3 Issues of Using VFD on Single Phase Power Supplies

high frequency solar pump inverter

A solar pump inverter converts the direct current of solar panel into alternating current for powering any pump driven by a three-phase motor. It also provides complete pump protection against surges, dry running, low frequency, overheating, and overloads. It is one of the most needful devices for any solar water pumping system to work efficiently and effectively.

It is specially designed for the watering system. A high-frequency solar pump inverter has special functions that are adopted for use with photovoltaic arrays, including power point tracking and anti-islanding protection. It tracks the maximum power of the solar panels and is effective to increase the output of the solar panels.

Incidentally variable frequency drives (VFDs) have become highly important in today’s industrial applications. These come in single-phase and 3-phase process, each having their particular characteristics. Here we are going to discuss some important factors related to single-phase VFD.

Why not just use a rotary phase converter instead of a single-phase VFD?
A phase power generally covert single-phase power to three-phase power, but it doesn’t offer the many benefits that a VFD offers. There is also a similar problem to be made on the cost of a phase converter and it will likely not save much, compared to a drive.

Issues of Using VFD on Single Phase Power Supplies
The operation of VFD on a single-phase power line is very simple, but you do need to be aware of some of the issues that are:

1.  EMC Compliance
Usually, VFD satisfies the requirements of certain standards. And for achieving this standard it’s essential to install the equipment as per the manufacturer’s instruction. It can require screened VFD cables from the VFD to the motor. Some additional measures may be required for installation that may be sensitive to RFI.

2. Harmonics
All VFDs produce some form of harmonics on the line power that’s expressively improved when operating on a single-phase power supply and mostly so, on single-wire earth return where the loading on smaller suppliers may be relatively high. The sizing of the transformer and the VFD loading on the power supply needs to be taken into consideration when concerned about harmonics and the effect of the excessive harmonics may cause overheating of electrical components.

3. Temperature Rating
A single wire earth return line system only occurs in rural areas, where higher ambient temperatures may be experienced, and because of this, the ambient temperature must be considered. Around the world, some manufacturers offer VFDs with a continuous rating of ambient, and a VFD is available so the equipment can be used as direct wall mounting without further enclosing. It promotes better cooling and lowers internal temperatures.

These are some issues of using VFD on a single-phase power supply. There are many manufacturers around the globe that manufacture quality VFDs, high-frequency solar pump inverter for increasing the output of the solar panels, to meet varied industrial applications’ requirements.

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