Semiconductor device and motor control method
AssigneeRenesas Electronics Corporation
InventorNaohiko Aoki
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Abstract
A semiconductor device for controlling a three-phase motor with double windings, includes a first inverter that drives a first winding of the three-phase motor, a second inverter that drives a second winding of the three-phase motor and a communication line between the first and second inverters. The first and second inverters, through the communication line, notify a respective operation state each other.
Claims11
A semiconductor device for controlling a three-phase motor with double windings, the semiconductor device comprising:
- a first inverter that drives a first winding of the three-phase motor;
- a second inverter that drives a second winding of the three-phase motor;
- and
- a communication line between the first and second inverters,
- wherein the first and second inverters, through the communication line, notify a respective operation state each other,
- wherein the first inverter includes a first control circuit,
- wherein the first control circuit, based on the operation state of the second inverter notified through the communication line, changes a drive current of the first winding, and
- wherein when the second inverter is in an abnormal state, the first control circuit adds a drive current to be flowed in the second winding by the second inverter to the drive current of the first winding.
A semiconductor device for controlling a three-phase motor with double windings, the semiconductor device comprising:
- a first inverter that drives a first winding of the three-phase motor;
- a second inverter that drives a second winding of the three-phase motor;
- and
- a communication line between the first and second inverters,
- wherein the first and second inverters, through the communication line, notify a respective operation state each other,
- wherein the first inverter includes a first control circuit,
- wherein the first control circuit, based on the operation state of the second inverter notified through the communication line, changes a drive current of the first winding,
- wherein the first inverter further includes a first temperature detection circuit,
- wherein the second inverter includes a second control circuit and a second temperature detection circuit, and
- wherein the first and second control circuits change the respective drive currents of the first and second windings in accordance with temperatures indicated by the first and second temperature detection circuits.
A semiconductor device for controlling a three-phase motor with double windings, the semiconductor device comprising:
- a first inverter that drives a first winding of the three-phase motor;
- a second inverter that drives a second winding of the three-phase motor;
- and
- a communication line between the first and second inverters,
- wherein the first and second inverters, through the communication line, notify a respective operation state each other,
- wherein the first inverter includes a first control circuit,
- wherein the first control circuit, based on the operation state of the second inverter notified through the communication line, changes a drive current of the first winding,
- wherein the first inverter further includes a first PWM (Pulse Width Modulation) generation circuit and a first power transistor,
- wherein the second inverter further includes a second PWM generation circuit and a second power transistor,
- wherein the drive current of the first winding is generated by controlling a gate of the first power transistor by a PWM signal generated by the first PWM generation circuit, and
- wherein the drive current of the second winding is generated by controlling a gate of the second power transistor by a PWM signal generated by the second PWM generation circuit.
A motor control method for controlling a three-phase motor with double windings by a first and second inverters, the motor control method comprising:
- flowing a first drive current for driving a first winding of the three-phase motor by the first inverter,
- flowing a second driving current for driving a second winding of the three-phase motor by the second inverter, and
- notifying operation states of the first and second inverters each other,
- wherein the first inverter changes the first drive current based on the notified operating state of the second inverter,
- wherein the first inverter further includes a first power transistor,
- wherein the second inverter further includes a second power transistor,
- wherein the first inverter controls a gate of the first power transistor by a PWM (Pulse Width Modulation) signal, and
- wherein the second inverter controls a gate of the second power transistor by a PWM signal.
Dependencies are inferred from the claim text.