Apparatus and method to generate braking torque in an ac drive

Details Apparatus and method to generate braking torque in an ac drive Apparatus and method to generate braking torque in an ac drive

H - Electricity

02

P

H02P 3/18 (2006.01)

Patent

CA 2282802

A device and control method to produce braking torque counter to motor rotation. A converter supplies multiple frequency AC power to the motor. A first frequency is supplied at the normal operating frequency/speed. A second frequency, different from the normal operating frequency, is supplied to produce braking torque. The level of braking can be controlled to generally consume some or all of the braking in the device or motor. More than one braking frequency may be utilized. In addition, the relationship between the normal and braking frequency(s) can be maintained to limit motor pulsation.

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