VFD – Variable Frequency Drive: What, How, Where to Buy VFDs Know that a Variable Frequency Drive (VFD) controls the speed and torque of AC motors by adjusting the frequency and voltage of the power supply. Then assess your motor’s specifications and application requirements to select an appropriate VFD. Purchase high-quality VFDs from low-cost suppliers … Continue reading VFD – Variable Frequency Drive: What, How, Where to Buy VFDs