ADJUSTABLE FREQUENCY DRIVE on American Crane & Equipment Corp.


Crane and Hoist Equipment and Components by Type > Resource Center > Crane Glossary > ADJUSTABLE FREQUENCY DRIVE


	ADJUSTABLE FREQUENCY DRIVE
	A motor controller designed to convert fixed frequency AC power to available frequency power for AC motor speed control. The system is used in conjunction with a squirrel cage motor to control speed over a relatively wide, constant torque range, by maintaining a constant voltage / frequency ratio. This type of control "leashes" the in-rush current to deliver startup power to the motor as efficiently as possible providing a soft-start feature thereby minimizing load swing.

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