VSD (Variable Speed Drives) drives change the speed of a motor by changing the input voltage and can be used with both AC and DC motors. VSD drives supply specific amperage and voltage to a motor. By adding a VSD to an AC motor, speed can be varied with precision.In HVAC systems, these variable speed drives are used primarily to control fans in variable air volume systems. They are energy efficient and can help reduce noise generation.
Q: What is the difference between VSD (variable speed drive) and VFD (variable frequency drive)?
A: Variable speed drive refers to AC and DC drives whereas the variable frequency drive only applies to AC motors