Methods and systems for minimizing vibration in electric machines
AssigneeGeneral Electric Company
InventorsRobert K. Hollenbeck, David M. Erdman
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Abstract
Methods and apparatus for minimizing electrical machine vibration are described. In an exemplary embodiment of the method, power is applied to the motor under microprocessor control such that a pulse modulated current profile is applied to the motor which in turn controls the amount of torque generated by the motor. By adjusting current profiles, torque generation is controlled, and vibration and noise are eliminated.
Claims20
A method of controlling vibration of a motor using a motor control system wherein the motor control system includes a microprocessor, a memory coupled to the microprocessor, a driver circuit coupled to the motor and the microprocessor, and a motor control program including a current profile stored in the memory, said method comprising the steps of:
- configuring the motor control system such that the microprocessor executes the motor control program including the current profile and controls the driver circuit;
- modifying motor current such that a fundamental frequency component of a torque pulse is reduced compared with torque pulse harmonics;
- and
- applying the current profile to the motor.
A motor control system configured for reducing vibrations and noise in electric motors, said system comprising:
- a microprocessor;
- a memory coupled to said microprocessor;
- a driver circuit coupled to said electric motor and said microprocessor;
- and
- a motor control program stored in said memory and configured to be executed by said microprocessor, said motor control program configured to modify motor current such that a fundamental frequency component of a torque pulse is reduced compared with torque pulse harmonics.
Dependencies are inferred from the claim text.