Drive circuit for electric motors
AssigneeRegal Beloit America, Inc.
InventorLUDOVIC ANDRE CHRETIEN
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Abstract
Drive circuits for parallel electric motors are provided. A drive circuit includes an inverter, at least one current sensor, and a DSP. The inverter is coupled to and configured to provide three phase power to a plurality of parallel electric motors. The at least one current sensor is coupled to the inverter and is configured to measure stator phase currents output by the inverter for driving the plurality of parallel electric motors. The DSP is coupled to the inverter and the at least one current sensor and is configured to receive the stator phase currents from the at least one current sensor, and generate at least one PWM signal for controlling the inverter based on the stator phase currents.
Claims21
A drive circuit comprising:
- an inverter coupled to and configured to provide three phase power to a plurality of parallel electric motors, the plurality of parallel electric motors including at least one permanent magnet (PM) motor;
- at least one current sensor coupled to said inverter and configured to measure stator phase currents output by said inverter for driving the plurality of parallel electric motors;
- and
- a digital signal processor (DSP) coupled to said inverter and said at least one current sensor, said DSP configured to:
- receive the stator phase currents from said at least one current sensor;
- select a target PM motor that generates a largest torque output, among the at least one PM motor, based on the stator phase currents;
- and
- generate at least one PWM signal for controlling said inverter based on the stator phase currents to synchronize operation of the plurality of parallel electric motors based on a vector control algorithm operating on the stator current measurements of the target PM motor.
(canceled)
A drive circuit comprising:
- an inverter coupled to and configured to provide three phase power to a plurality of parallel electric motors, the plurality of parallel electric motors including at least one permanent magnet (PM) motor;
- at least two current sensors coupled to said inverter and configured to measure stator phase currents output by said inverter for driving the plurality of parallel electric motors;
- and
- a digital signal processor (DSP) coupled to said inverter and said at least two current sensors, said DSP configured to:
- receive the stator phase currents from said at least two sensors;
- select a target PM motor that generates a largest torque output, among the at least one PM motor, based on the stator phase currents;
- and
- generate at least one PWM signal for controlling said inverter based on the stator phase currents to synchronize operation of the plurality of parallel electric motors based on a vector control algorithm operating on the stator current measurements of the target PM motor.
Dependencies are inferred from the claim text.