Author: Veikong Electric

A Proven Platform Continues to Evolve  VEIKONG is pleased to introduce VFD500Plus, the next evolution of the proven VFD500 high-performance vector drive platform. For many years, VFD500 has served customers across a wide range of industrial applications and has built a strong reputation for stable operation, practical functions and reliable motor control. It has been one of VEIKONG’s important general-purpose drive products and a dependable choice for machine builders, system integrators and end users.  VFD500Plus builds on that established foundation. The “Plus” designation represents continuity as well as progress: the new series retains the practical general-purpose positioning of VFD500 while expanding motor compatibility, control performance, functional safety, communication options and system scalability. It is designed for customers who value the proven strengths of VFD500 but need additional capabilities for newer machines and more connected industrial systems.For users and service teams already familiar with VFD500, this development path also creates a clear product logic. Existing VFD500 experience remains valuable, while VFD500Plus provides a higher-specification option when new projects introduce more demanding motion control, safety integration or network requirements. Customers can therefore select the appropriate platform according to actual application needs rather than treating every project as requiring the same drive configuration.  Broader Motor Compatibility  VFD500 has provided mature control for asynchronous motor applications in many industries. VFD500Plus extends this capability to a wider range of motor technologies. In addition to asynchronous motors, it supports surface-mounted permanent magnet synchronous motors, interior permanent magnet synchronous motors and synchronous reluctance motors.  This broader compatibility allows equipment manufacturers to use one drive platform across more machine designs. Whether a project focuses on traditional induction motors, higher-efficiency permanent magnet motors or newer synchronous reluctance solutions, VFD500Plus provides greater flexibility for product development, upgrading and standardization.  Enhanced Vector Control and Low Speed Performance  Building on the V/F and sensorless vector control experience of VFD500, VFD500Plus provides V/F control, sensorless vector control and closed-loop vector control with a speed sensor. Its speed regulation range reaches 1:100 under V/F control, 1:200 under sensorless vector control and 1:1000 under closed-loop vector control.  The drive also delivers strong low-speed load capability: 150% at 0.5 Hz in V/F mode, 180% at 0.25 Hz in sensorless vector mode and 180% at zero speed in closed-loop vector mode. These improvements give users more control headroom in applications requiring stable starting, accurate speed regulation, rapid load response or dependable torque at very low speed.  A Wider Power Range and Stronger System Scalability  VFD500Plus covers power ratings from 0.4 kW to 1000 kW, allowing the same product family to support compact machinery as well as large industrial systems. The expanded range helps customers reduce the need to combine unrelated drive platforms when equipment portfolios include both low-power and high-power machines.  Two motor parameter groups, multiple acceleration and deceleration settings, process PID, simple PLC logic, multi-step speed operation, skip frequency and V/F separation further improve adaptability. These functions support different operating conditions without losing the straightforward commissioning approach expected from a general-purpose drive.  Functional Safety and Reliability Upgrades  Dual Safe Torque Off inputs are standard on VFD500Plus. In an appropriately designed safety system, STO can prevent the drive from producing motor torque and gives machine designers a more convenient basis for integrating functional safety. The final safety architecture should always be evaluated according to the machine, risk assessment and applicable standards.  Reliability has also been further strengthened through thermal simulation, optimized heat dissipation and an independent air duct that helps reduce dust entry into the drive. A large-air-volume, long-life cooling fan and enlarged aluminum heat-sink fins support temperature control. Comprehensive protection functions cover conditions including phase loss, overcurrent, motor overload, drive overload, overtemperature, ground short circuit, motor overspeed, speed deviation and PID feedback loss.  More Communication and Expansion Choices  VFD500Plus retains standard Modbus communication and adds a broader range of optional network solutions, including CANopen, EtherCAT, PROFINET, Modbus TCP, Ethernet and BACnet. This makes the drive easier to integrate into PLC systems, industrial Ethernet networks, building automation and more advanced machine architectures.  Encoder expansion options include incremental encoders, resolvers and Tamagawa-protocol absolute encoders. Users can also select a standard digital keypad, an optional dual-display keypad or an optional LCD keypad. Together with expandable I/O and communication options, these choices make configuration more flexible while keeping the standard product practical.  Smooth Operation for Modern Industrial Applications  Speed tracking start allows VFD500Plus to identify and smoothly restart a motor that is still rotating, helping reduce current and mechanical shock on fans, pumps and other inertia loads. Over-excitation can assist deceleration in suitable applications, while under-voltage stall prevention helps the motor decelerate in a controlled manner during a momentary power interruption and supports recovery after power returns.  VFD500 remains a proven high-performance platform whose reliability has been demonstrated through years of industrial use. VFD500Plus carries that experience forward and adds more capability for projects that require multiple motor types, higher control accuracy, functional safety, broader connectivity or a larger power range. With this launch, VEIKONG offers customers a stronger and more future-ready general-purpose drive platform without losing the practical engineering foundation that made VFD500 successful. 

Walk through a plant, and you will hear four names for what looks like the same box on the wall: VFD, frequency inverter, frequency converter, and servo drive. Buyers often ask if these are four different products. Some of the names describe one thing, and one of them describes a different job.  Utility power arrives at a fixed frequency. A drive lets a motor run at other speeds, so one motor can handle work that changes. Drives have also become compact and versatile, since microprocessors replaced older solid-state elements.  You can find them in petroleum, chemical, hoisting, water supply, plastics, textiles, printing, and packing. With that many uses, the naming gets messy.  The Short Answer  VFD, frequency inverter, and frequency converter point to the same family of devices. A servo drive is the one with a different focus: position control and precision.  What Is a VFD?  A VFD starts a motor smoothly and brings it up to the desired speed at a controlled acceleration rate. It also controls torque and direction. That means one motor can serve jobs that need different speeds.  A VFD system has three parts:  People usually pick a VFD for these reasons:  Frequency Inverter and Frequency Converter: Same Idea, Different Words  Veikong’s own pages show how loosely these terms get used. The pump page talks about frequency converters, while the product lines are called frequency inverters and VFDs. They describe the same drive doing the same work.  Pumps make a clear example. When a drive slows a pump, the pump curve shifts down. The system reaches the same reduced flow it would get from a valve, such as 700 GPM down from 1200 GPM, but at a lower pressure.  Lower pressure can mean longer pump seal life, less impeller wear, and less vibration and noise. Because of the affinity laws, power drops sharply at reduced flow. That drop is where the savings come from.  Typical pump uses include:  Where a Servo Drive Is Different  The S6 shows what sets a servo drive apart. It is a spindle-dedicated servo drive, built to run the spindle motors of CNC lathes, milling machines, machining centers, and grinders. It brings position control and encoder interfaces that a plain speed drive does not focus on.  Key details of the S6:  There is also a middle ground. The VFD550I electro-hydraulic servo inverter is made for hydraulic control.  It supports asynchronous and permanent magnet synchronous motors, and it handles pressure control under encoderless vector control with built-in pressure control algorithms. It suits injection molding machines, die-casting machines, and hydraulic stations.  Which One Fits Your Machine?  Match the drive to the job:  Veikong’s Drive Range at a Glance  The range also includes the VFD 500, VFD 530, and VFD 550 AC drives, plus bypass soft starters.  Why Buyers Look at Veikong Electric  Shenzhen VEIKONG Electric Co. Ltd. is an AC drive enterprise founded in 2004. It researches, manufactures, and trades high-, medium-, and low-voltage frequency inverters, with general purpose VFDs available up to 1000kW.  Its R&D and management team brings more than 20 years of experience in research, product development, and quality management.  Summary  VFD, frequency inverter, and frequency converter are three names for one kind of drive, which controls the speed, torque, and direction of an AC motor. Veikong’s general purpose VFDs cover power ratings up to 1000kW.  A servo drive such as the S6 goes further with position control, spindle orientation, and encoder interfaces. The VFD550I sits between the two for hydraulic pressure control.  Not sure which drive suits your machine? Send the Veikong team your motor and application details, and they will help you select the right one. 

VFD Fault Codes Explained: Overcurrent, Overvoltage, Undervoltage, and Overload Trips (Causes and Fixes) Variable frequency drives protect both the motor and the equipment they run. When a drive detects a condition outside safe limits, it stops the process and displays a fault code. For plant engineers and maintenance teams, the priority is to find the cause quickly and correct it before production is affected. A trip does not always mean the drive is faulty. Many events that appear to be drive failures begin elsewhere, in the wiring, the mechanical load, or the incoming supply. Accurate diagnosis depends on reviewing the whole system, not only the drive. This guide explains four common trips: overcurrent, overvoltage, undervoltage, and overload. For each one, it outlines the typical causes and the recommended corrective actions. Quick Comparison of the Four Trips Trip Typical Trigger First fix to try Overcurrent Loose connections, damaged wires, mechanical friction, fast acceleration, heavy starting load   Check wiring, run autotuning, lengthen acceleration time. Overvoltage Quick deceleration, overhauling loads, supply voltage spikes Lengthen deceleration time, stabilize the supply, add braking resistors or a regenerative supply   Undervoltage Supply voltage too low, grid fluctuations Measure input voltage and DC bus, confirm the supply matches the drive rating   Overload Undersized drive, starting torque or surge loads, heat Recheck sizing with margin, clean and cool the drive, consider derating   What Is a VFD Fault Code? A VFD fault code is the drive’s way of naming the problem it detected before it stopped. Frequency converters help keep production stable through fault diagnosis. They point to process problems, and sometimes the drive itself needs repair or replacement. First Steps Before You Reset Anything A few quick checks save a lot of guessing: Overcurrent Trips Overcurrent means the drive saw more current than it should. It is one of the most common trips, and the cause is often simple. Common causes How to fix it Overvoltage Trips Overvoltage shows up most often when a motor slows down fast. During quick deceleration, the motor acts like a generator and sends energy back into the drive. Voltage spikes on the supply side can cause the same trip. Overhauling loads, where machine inertia keeps pushing the motor, do it too. How to fix it Veikong Electric lists a braking chopper, an aluminum resistor, and a ripple resistor, each with its own datasheet. Check the datasheet for ratings, and confirm the match with the technical team before ordering. Undervoltage Trips Undervoltage refers to a supply that is too low. A low supply can also make a drive stop for reasons that look unclear at first. What to check If the drive stops for no clear reason Use this short routine: Overload Trips Overload happens when the drive is asked for more than it can deliver. The most common reason is sizing. A drive that is too small trips out under load. Common causes How to fix it How to Prevent Repeat Trips Is Every Trip a Drive Failure? No, many trips come from loose wiring, a stuck load, supply problems, or heat. Check the system before replacing the drive. How Veikong Backs Its Drives Shenzhen VEIKONG Electric Co., Ltd researches, manufactures, and trades high-, medium-, and low-voltage frequency inverters, and has been doing so since 2004. Its products follow ISO9001 quality management and meet ISO, CE, and IEC standards. Before delivery, each product passes a 12-hour power-on aging test in a high-temperature chamber, then a final full-load test. Support includes: Overcurrent often points to wiring, friction, or fast acceleration. Overvoltage usually comes from quick stops, so slow the deceleration or add braking. Undervoltage means checking the supply and the signals. Overload is mostly about sizing, starting torque, and heat. Read the code, check live values, and ask what changed on the machine. Need help with a drive that keeps tripping, or choosing the right size? Email infoveikong-electric.com, call +86-0755-89587650, or message on WhatsApp at +86 15989436541. For technical support, write to Service@veikong-electric.com.

Ask anyone who runs heavy equipment which part of the cycle worries them most, and many will say the stop. A motor that starts slowly is an inconvenience. A motor that won’t stop when it should is a risk to people, loads, and machines.  That is why braking gets real attention in lifting, pumping, and other industrial work. A stop often needs to be quick. It also needs to be controlled. Getting both takes the right drive and, in many cases, the right braking parts.   This post looks at how a drive fits into the picture, which braking products Veikong Electric offers, and what to prepare before choosing a setup.  Start With the Drive  Braking makes more sense once you know what a variable frequency drive (VFD) does. Veikong Electric describes it as an electronic system that controls an AC induction motor. It manages torque, speed, and direction, and it brings the motor up to speed at a controlled rate.  The company says a VFD system has three parts:  Stopping is built into drive control from the start. Braking parts extend it.  When Does a VFD Make Sense?  Veikong recommends a VFD in several situations. Stopping belongs to the same control picture, so the list is worth knowing. It includes:  The site also notes that VFDs have become compact and versatile over the years, thanks to microprocessors replacing solid-state elements.  The Three Braking Products in Veikong’s Range  Veikong lists these braking-related items in its product menu:  Each one has its own downloadable datasheet. Ratings and model numbers are best confirmed with the technical team, since the datasheets are the place to check exact specifications.  Where Stopping Matters Most: Lifting  Veikong’s clearest braking material is on its hoist and crane page. It describes drives for lifting with reliable braking control, quick stop, and DC excitation control. The stated goal is a system that is safe, reliable, and efficient.  The page also says the company offers several drive types for lifting work: translational structural, full inverter, and dynamic braking frequency inverter. Cranes and hoists differ a great deal, so the right choice depends on the machine.  The idea behind the brake control is simple. Electrical braking is set up to match mechanical braking. Together they act as a protective lock on the system.  What Else a Lifting Drive Needs to Do  Stopping is only part of the picture. A lifting drive also has to hold a load steadily at low speed and work alongside other motors. Veikong’s page lists these features:  These drives are used for lifting, pitching, luffing, wheelbarrow, gyration, and grabbing work.  Other Parts in the Same Product Family  A braking setup rarely stands alone. Veikong groups several support products in the same catalog, so a buyer can look at the whole drive system in one place.  Chokes (reactors):  Filters:  Alongside these sit the drive ranges themselves, including the VFD500, VFD530, VFD550, and VFD580, as well as bypass and online soft starters. Seeing the full range helps when a project needs more than one part.  Choosing a Braking Setup: What to Have Ready  Veikong’s site does not publish a sizing formula for choppers and resistors, so the safest route is to talk to the technical team early. Arrive with clear answers to a few questions.  Clear answers here save time and lead to a better match.  Who Is Behind These Products?  Shenzhen VEIKONG Electric Co., Ltd. researches, manufactures, and trades high-, medium-, and low-voltage frequency inverters. It gives 2004 as its founding year and reports more than 20 years of experience.   The team says it has that same depth of experience in theoretical research, product development, and quality management. Its drives use SPWM, sensorless vector control, and vector and torque control technology.  On quality and standards, the site says:  There are various industries using Veikong products, including petroleum, chemical, melting, hoisting, electric power, building materials, water supply, plastics, textiles, printing, and packing.  Read Also: How to Size a VFD for Your Motor: A Complete kW/HP Selection Guide   Summary  A motor needs a good stop as much as a good start. A VFD gives control over speed, torque, and direction, and braking choppers and resistors support the stopping side of the job. Veikong Electric lists a Braking Chopper, an Aluminum Resistor, and a Ripple Resistor. It also builds lifting drives around reliable brake control, quick stop, and DC excitation.  If you are planning a braking setup, gather your motor, drive, and application details first. Then check the datasheets and confirm the match with the Veikong team before you order. 

Picking the wrong drive for a motor is one of the most common mistakes in industrial automation, and one of the costliest. A drive that’s too small trips out under load. One that’s too big wastes money and can even hide real problems with your motor or process.  Getting the kW-to-HP match right, along with voltage, load type, and control mode, is the difference between a system that runs for years and one that keeps you on the phone with tech support.  This guide walks through the practical steps from sizing a variable frequency drive (VFD) to a motor, using real specification ranges and technology built into VEIKONG’s own product line as reference points.  What a VFD Actually Does  A VFD controls an AC induction motor’s speed, torque, and direction by adjusting the frequency of the power it sends to the motor. Instead of running at one fixed speed set by utility power, the motor can ramp up smoothly and hold whatever speed the process needs.  A VFD system is generally made up of three parts:  Sizing starts with understanding how these three pieces need to work together for your specific application.  Step 1: Start With the Motor Nameplate  Before you look at any drive catalog, pull the numbers straight off the motor nameplate: rated kW or HP, rated voltage, rated current, rated frequency, and rated RPM. These are the same values you’ll enter into the drive during setup for motor parameter self-learning, so accuracy here matters.   On VEIKONG drives, this data feeds directly into vector control parameters so the drive can auto-tune itself to the motor.  Step 2: Match Voltage and Phase to Your Supply  VFDs are built around specific voltage and phase combinations, and getting this wrong is an easy way to damage equipment. VEIKONG’s general-purpose drives are available in:  Always confirm the incoming supply voltage and phase count matches the drive’s rated input before ordering.  Step 3: Know Your Load Type  Not every motor works the same way once it’s spinning. This is where load type comes in, and it directly affects how you size the drive.  Pump and fan loads follow the affinity laws, meaning power demand drops sharply as speed drops. This is why a VFD on a pump can produce major energy savings. Reducing pump speed even a little cuts power draw by a lot, since flow relates to speed, but power relates to speed cubed.   Applying this principle correctly means you size the drive around the motor’s full load current, not just the average running condition, since the drive still needs headroom for startup and peak demand moments.  Other loads, like hoists, cranes, or machines with heavy starting torque, need a different approach. These require high starting torque even at low speeds, so the drive has to be capable of full torque output from a near standstill, not just at running speed.  Step 4: Account for Starting and Overload Needs  Once you know your load type, match it to the drive’s control mode. VEIKONG’s drives support sensorless vector control (SVC) and closed-loop vector control (VC) for applications that need strong, precise torque management and can deliver acceleration and deceleration in as little as 0.1 seconds in VC mode.   For lifting and hoisting equipment specifically, some models include dedicated lifting logic and brake control functions built into the software.  Don’t size a drive purely on running kW. Add margin for:  Step 5: Pick the Right Drive Family for the kW Range  Once you have your motor’s kW/HP, voltage, and load profile, match it to a drive series built for that range. VEIKONG’s lineup spans several tiers:  Drive Series   Typical Range   Best Fit  VFD 500M  0.4 to 4kW (1-phase), 0.75 to 7.5kW (3-phase)   Economic, smaller motors  VFD 500  General purpose, 220V and 380V models   Standard industrial motors  VFD 530  220V and 380V models  High-precision PMSM and IM motors, lifting applications   VFD 510 IP55  2.2kW to 45kW or higher  Harsh, dusty, or wet environments needing IP55 protection   VFD 580  High-end applications  Demanding vector control needs   If your application involves solar-powered pumping, VEIKONG also offers dedicated solar pump inverters designed around variable, unpredictable power input from PV arrays rather than a fixed utility feed.  When Should You Actually Use a VFD?  A VFD isn’t needed for every motor. It’s worth the investment when you need to:  Extra Specs Worth Checking  Beyond kW and voltage, a few technical details separate a drive that fits your operation from one that just barely works:  Read Also: Why Can a VFD Overheat Even When the Motor Current Is Normal? Understanding Carrier Frequency, Ambient Temperature  Summary  Sizing a VFD correctly comes down to five things: get accurate nameplate data, match voltage and phase, understand your load type, size in margin for starting torque and overload, and pick a drive family built for your kW range.  Skipping any one of these steps is how underpowered drives trip out, and oversized ones waste money.  VEIKONG Electric has over 20 years of experience manufacturing AC drives, solar pump inverters, and motor control solutions, with products built to ISO9001 and CE standards and backed by a 24-month warranty.  If you’re not sure which drive series fits your motor and application, their team offers free product selection support before you buy. 

Clean water doesn’t move on its own. Every stage, from source to tap and from treatment back into the environment, relies on pumps, blowers, and motors running around the clock.  Yet water demand is never steady. It rises in the morning, dips at night, and spikes during storms or peak industrial hours. Plants that run their motors at one fixed speed regardless of demand end up paying for capacity they don’t need most of the time, and they put extra strain on pipes and equipment in the process.  Variable frequency drives exist to solve that mismatch, and they’ve become one of the most practical upgrades a water or wastewater facility can make.  Why Motor Control Matters in Water Treatment  Water and wastewater treatment plants run on pumps. Raw water intake pumps, booster pumps, chemical dosing pumps, aeration blowers, and sludge pumps all depend on electric motors that rarely need to run at full speed all day.   Demand changes by the hour, sometimes by the minute, as water use rises and falls across a city or industrial site. Running every motor at fixed speed, all the time, wastes energy and puts extra wear on pipes, valves, and seals.  This is where variable frequency drives, or VFDs, come in. A VFD adjusts motor speed to match real demand instead of forcing the system to throttle flow with valves. That single change affects almost everything downstream: energy bills, equipment life, and how smoothly a plant runs day to day.   Below, we walk through how VFDs work, where they fit into a treatment plant, and what to look for in a drive built for this kind of duty.  What Is a VFD?  A variable frequency drive is an electronic system that controls an AC induction motor. It manages torque, speed, and direction, and it brings a motor up to its target speed at a controlled rate instead of slamming it on at full power.  A VFD system is made up of three parts:  Modern drives have gotten smaller and more capable over the years, largely because microprocessors have replaced older solid-state components. That shrinkage matters in a treatment plant, where control panels and lift station enclosures often have limited space.  Where VFDs Fit Into a Treatment Plant  Pump behavior follows a set of rules known as the affinity laws, and understanding them helps explain why VFDs save so much energy. A pump has a curve that shows how flow and pressure relate to each other.   A system curve, built from the piping, valves, and fittings in place, shows how much resistance the pump has to push against. Most plants don’t run at one fixed flow rate all day.   Two common ways to manage that are:  A VFD takes a different approach. Instead of fighting the system with a valve, it slows the pump down. This shifts the entire pump curve downward, so the same reduced flow is reached, but at lower pressure and much lower power draw.   In practical terms, this means:  Lower risk of pipeline stress from resonance, since a variable operating frequency makes it hard for the pipe’s natural resonance to line up with the motor’s running frequency  Booster pumps, along with chilled and hot water pumps and condenser water pumps, are named as typical applications where frequency converters deliver these benefits.  When Should a Plant Use a VFD?  A VFD isn’t the right fit for every motor, but it earns its place in several common treatment-plant situations:  A Manufacturer’s Drive Lineup for Water Applications  Veikong Electric, based in Shenzhen, China, builds several drive families that apply directly to water and wastewater duty.  The VFD500 is the company’s general-purpose AC drive. It supports MODBUS, CANopen, PROFINET, EtherCAT, and TCP communication, so it can talk to a plant’s SCADA or PLC network. It also supports closed-loop PG card operation, PT100/PT1000 temperature sensor inputs for monitoring motor or process temperature, and an STO (Safe Torque Off) safety function.   Veikong states that internal testing against other brands showed lower output current and higher torque from the VFD500, along with acceleration and deceleration as fast as 0.1 seconds in VC control mode.  For larger or more demanding processes, the VFD580 is the company’s high-end vector drive. It works with synchronous, asynchronous, spindle, and servo motors, supports dual closed-loop control, and includes a built-in comparator and logic control unit that can act as a simple PLC.   It also carries PT100/PT1000 sensor support and an incremental encoder port, useful where a plant needs tighter process feedback.  Other Veikong Products Built Around Water Supply Duty   Beyond general-purpose drives, Veikong also offers products built specifically around water supply duty:  Company Background and Quality Standards  Shenzhen Veikong Electric Co., Ltd. was founded in 2004 and has more than 20 years of experience researching, manufacturing, and trading high-, medium-, and low-voltage frequency inverters.  The company follows the ISO9001 standard for quality management, and its products have passed CE certification. Veikong also states a commitment to complying with ISO14001 environmental management requirements and OHSAS18001 occupational health and safety standards across its operations.   The company reports a global reach of 200+, more than 150 satisfied clients, and more than 150 awards.  Read Also: Variable Frequency Drive (VFD) vs. Soft Starter: A Comparative Guide for Industrial Motor Control  Summary  VFDs give water and wastewater plants a way to match motor speed to actual demand instead of wasting energy through valve throttling. The payoff shows up as lower power bills, longer equipment life, and quieter, more stable operation.  Choosing the right drive depends on the application: a general-purpose drive with strong communication support for standard pumping duty, a high-end vector drive for processes that need tight feedback control, or a purpose-built constant pressure or multi-pump product for booster and lift station work.  For plants weighing a VFD upgrade, matching the drive to the actual duty cycle, communication needs, and pump type makes the difference between a good fit and an expensive mismatch. 

Variable frequency drives (VFDs) run pumps, fans, compressors, and conveyors in plants of every kind. They save energy by matching motor speed to the job, which is why so many facilities rely on them.  A drive also changes the electricity around it. It affects the power supply on one side and the motor on the other. Reactors and filters keep those effects in check. This guide covers what they do, when you need them, and how to choose.  The Short Answer: A VFD needs reactors and filters because it creates two different problems. On the input side, it draws current in short pulses, which produces harmonics. On the output side, fast switching can send high voltage peaks to the motor, and long cables make that worse. Reactors and filters reduce both.  What Happens on the Input Side of a VFD?  Most VFDs begin with a diode bridge rectifier that turns AC power into DC. The rectifier only conducts near the peak of the voltage wave. So the drive pulls current in narrow spikes rather than a smooth flow.  Those spikes contain harmonics. These are extra frequencies layered on top of the normal 50 Hz or 60 Hz supply. In a standard six-pulse rectifier, the main ones are the 5th, 7th, 11th, and 13th.  What problems do harmonics cause?  What Happens on the Output Side?  The drive switches its output at high frequency. Veikong’s sine wave filter datasheet says this can produce voltage peaks of 1,300 V or more at the motor terminals and coils. That constant stress ages the motor.   It weakens the coils, wears and pits the bearings, and adds heat, noise, and cable interference. The longer the distance between drive and motor, the stronger the effect.  Which Reactors Help, and What Does Each One Do?  Veikong’s range includes three reactors, also called chokes: DC, AC input, and AC output.  1. DC reactor  A DC choke sits between the rectifier and the DC bus capacitors. According to Veikong’s datasheet, it:  The selection table for 400 V drives runs from 0.4/0.75 kW (3 A) up to 720 kW (1,800 A). Many Veikong drives also include a built-in DC choke as standard, or offer optional external reactors.  2. AC input (line) reactor  The simplest fix on the input side is a 3% or 5% AC line reactor. It raises the source impedance, which smooths the sharp current pulses and cuts harmonic current distortion.  3. AC output reactor  Long motor cables raise capacitive leakage current, which can trip the drive or damage it. Veikong’s sizing guide recommends an output reactor once the cable passes 50 meters.  Which Filters Does Veikong Offer?  The product range lists an AC input filter (EMI), an AC output filter, a sine-wave filter, and a harmonic filter.  1. Sine-wave filter  This filter sits between the drive and the motor. The datasheet lists these benefits:  2.  Harmonic filters  Some sites need more than a reactor, such as those with sensitive equipment or many drives. Passive harmonic filters are tuned to trap specific harmonics, typically the 5th and 7th. Active harmonic filters sense distortion in real time and inject opposite currents to cancel it.  How Do You Choose the Right Protection?  Does every VFD need a filter or reactor?  Not always. Veikong notes that simple, low-cost steps often bring a big improvement, so advanced filtering is not always needed right away.  A quick reference  What should you tell the supplier?  Veikong’s datasheet says all network conditions must be gathered before a filter is chosen:  Veikong’s technical team asks for your motor nameplate details and a description of the application. They say they will reply with a recommendation within 24 hours.  About Veikong  Shenzhen Veikong Electric Co., Ltd. is an AC drive company that researches, makes, and trades high-, medium-, and low-voltage frequency inverters. Veikong was founded in 2004 and cites more than 20 years of experience.   Shenzhen Veikong Electric Co., Ltd. follows the ISO 9001 standard for quality management and that its products have passed CE certification.  Read Also: Why Does Motor Cable Length Matter in VFD Systems? Understanding Reflected Voltage and Output Protection  Summary  A VFD affects both sides of a system. On the input side, it draws current in short pulses, which creates harmonics. A 3% or 5% AC line reactor, a DC choke, or a harmonic filter can bring those down.  On the output side, fast switching can put high voltage peaks on the motor. Output reactors and sine-wave filters reduce that stress. Veikong recommends an output reactor above 50 meters of motor cable, and a sine wave filter with a lower carrier frequency above 100 meters.  With proper filtering, Veikong drives support shielded cable up to 500 meters. Simple parts often do the job first, so match the choice to your motor, cable run, and application.  Contact Veikong  Need help matching a reactor or filter to your drive and motor? Send your motor nameplate details and application description to the technical team.  Address: 4F, Building 5, Dongluyang Industrial Park, No. 4, Tengfeng 4th Road, Fuyong Phoenix Third Industrial Zone, Baoan District, Shenzhen, China

VEIKONG is pleased to announce that we will participate in the China International Industry Fair 2026, which will be held from October 12 to 16, 2026, at the National Exhibition and Convention Center in Shanghai, China.s  This will be VEIKONG’s first appearance at CIIF under our own brand, representing an important step in strengthening our presence in the industrial automation market. We warmly invite customers, distributors, system integrators, equipment manufacturers, and industry professionals to visit us at Hall 8.1, Booth F128.  At the exhibition, visitors will have the opportunity to explore VEIKONG’s latest variable frequency drives, specialized motor control solutions, soft starters, and related industrial automation products.  Exhibition Information  Date: October 12–16, 2026 Venue: National Exhibition and Convention Center, Shanghai, China Hall: 8.1 Booth: F128  Discover VEIKONG’s Industrial Drive Solutions  Modern industrial equipment requires more than simple motor speed adjustment. Different machines have different requirements for starting torque, speed accuracy, overload capacity, communication, braking, protection, and environmental adaptability.  At CIIF 2026, VEIKONG will present a selection of drive solutions developed for a wide range of industrial applications. Our product portfolio includes general-purpose variable frequency drives, high-performance vector drives, lifting application drives, solar pump inverters, high-protection solutions, soft starters, and supporting accessories.  These products can be considered for applications such as pumps, fans, air compressors, lifting equipment, textile machinery, packaging machines, woodworking equipment, CNC machines, conveyors, logistics systems, and other motor-driven equipment.  Rather than recommending the same product for every project, the VEIKONG team evaluates the motor parameters, power supply, load characteristics, control requirements, installation environment, and operating conditions before proposing a suitable solution.  Face-to-Face Technical Communication  One of the most valuable parts of an industrial exhibition is the opportunity to discuss real applications directly with customers and engineers.  At the VEIKONG booth, visitors can bring information about their motors, machines, current drive systems, or new projects. Our team will be available to discuss topics such as VFD model selection, motor compatibility, voltage and power requirements, overload capacity, braking solutions, communication functions, parameter settings, and system configuration.  For specialized applications, customers can also communicate with us about lifting control, multi-motor coordination, solar water pumping, high-frequency motor operation, constant-pressure water supply, and other application requirements.  These discussions help both sides move beyond basic catalogue specifications. By understanding the actual working conditions, we can provide recommendations that are more relevant to the customer’s equipment and reduce potential problems during installation and commissioning.  Reliable Products Supported by Testing  Reliability is one of the most important considerations when choosing an industrial drive. A VFD may operate continuously for long periods and may face changing loads, high temperatures, dust, voltage fluctuations, or demanding acceleration and deceleration cycles.  VEIKONG pays close attention to product testing and quality control. Before delivery, our products undergo multiple inspection and testing procedures according to the product type and power range. The purpose is to verify basic functions, output performance, protection functions, and operating stability before the equipment reaches the customer.  At CIIF 2026, visitors can examine the products directly and learn more about their structure, keypad options, control functions, communication capabilities, protection features, and application positioning.  Technical Support Beyond Product Delivery  Industrial automation products often require professional support throughout the project. Correct selection and parameter configuration are just as important as the hardware itself.  VEIKONG provides support during both the pre-sales and after-sales stages. Before an order, our sales and engineering teams can help customers confirm product selection based on the motor information and application conditions. After delivery, we can assist with parameter settings, installation questions, commissioning, troubleshooting, and other technical issues.  This support is particularly important for customers using a new product series or applying a VFD to specialized equipment for the first time. Clear communication can help shorten the commissioning process and reduce unnecessary trial and error.  Cooperation Opportunities for Global Partners  CIIF 2026 will also provide an opportunity for VEIKONG to meet distributors, automation companies, panel builders, system integrators, and equipment manufacturers seeking long-term cooperation.  In addition to standard products, visitors can discuss OEM and ODM requirements, logo and label customization, keypad options, product documentation, communication functions, accessories, and market development plans with our team.  VEIKONG has served customers in different international markets and understands that each region may have different voltage standards, application habits, certification requirements, service expectations, and market positioning. We aim to build practical partnerships based on suitable products, responsive communication, and long-term technical support.  Visit VEIKONG at Hall 8.1, Booth F128  CIIF 2026 will be an important opportunity for VEIKONG to present our products, exchange application experience, listen to market feedback, and establish new partnerships.  Whether you are looking for a VFD for a specific machine, evaluating a new industrial drive supplier, developing your own automation product line, or searching for a reliable long-term manufacturing partner, we welcome you to visit our booth and speak with our team.  Meet VEIKONG at the National Exhibition and Convention Center in Shanghai from October 12 to 16, 2026.  We look forward to welcoming you at Hall 8.1, Booth F128 and exploring new possibilities in industrial automation together.