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Variable Frequency Drives (VFD)

Variable-frequency drive (VFD) or adjustable-frequency drive, variable-voltage/variable-frequency (VVVF) drive, variable speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage. VFDs are used in applications ranging from small appliances to large compressors

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