Variable Speed Drives have become the prominent motor tools when it comes to optimise the speed of HVAC equipment. Variable speed drives are ideal and effective to control the connected load speed, ramping up and down the motor speeds, thereby limiting the energy usage and improving the performance and durability of the equipment.
Owing to this benefit, there are several applications where variable Speed Drives are used typically, as appended below:
Variable speed drives help to create variable torque characteristic of the fan and the reduction in input power is in cube law relative to the reduction in speed. While damper controls have been other speed reduction method in fans, that led to the decrease in input power with reduced flow rate but lead to noise generation because of damper changing position that creates noise and vibration. This is something variable speed drives are effective at controlling and reducing.
Whereas variable speed drives effectively helps to enhance the control of the motor speed resulting in enhanced efficiency and improved power saving, overall.
There are various HVAC equipment whose functioning has been changed and efficiency has been improved using the variable speed drives (VSDs) like water pumping systems, boiler systems and more, across several industries.