Semiconductor device and power conversion device
AssigneeRenesas Electronics Corporation
InventorMasashi Tsubota
Life of this patent
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Abstract
To solve the problem of multi-pulse control in which the load of the control software is increased and further switching/timing adjustment is required, a semiconductor device includes a control unit including a CPU and a memory, a PWM output circuit for controlling the driver IC to drive the power semiconductor device, a current detection circuit for detecting the motor current, and an angle detection circuit for detecting the angle of the motor. The PWM output circuit includes a square wave generator circuit to generate a square wave based on the angle of the angle detection circuit as well as the base square wave information.
Claims15
A semiconductor device comprising:
- a control circuit including a central processing unit (CPU) and a memory;
- a pulse width modulation (PWM) output circuit configured to control a driver integrated circuit (IC) that drives a power semiconductor device;
- a current detection circuit configured to detect a motor current;
- and
- an angle detection circuit configured to detect an angle of the motor,
- wherein the PMW output circuit includes a square wave generator circuit,
- wherein the square wave generator circuit generates a square wave based on an angle information of the angle detection circuit and a base square wave information, and
- wherein the control circuit is configured to:
- (a) generate a theoretical sine wave;
- (b) generate the base square wave information based on a deviation between a motor current measurement waveform and the theoretical sine wave;
- (c) adjust the base square wave information by changing a duty cycle of the base square wave information;
- and
- (d) adjust the base square wave information by changing a phase of the base square wave information.
A semiconductor device comprising:
- a pulse width modulation (PWM) output circuit configured to control a driver integrated circuit (IC) that drives a power semiconductor device;
- a current detection circuit configured to detect a motor current;
- and
- an angle detection circuit configured to detect an angle of the motor,
- wherein the PWM output circuit comprises a square wave generator circuit,
- wherein the square wave generator circuit generates a square wave based on an angle information of the angle detection circuit as well as a theoretical sine wave, and
- wherein the square wave generator circuit further comprises an adjuster circuit configured to adjust a gain and an offset of current information from the current detection circuit.
A power conversion device comprising:
- a power semiconductor device configured to provide an alternating current (AC current) to a motor;
- a first semiconductor device configured to drive the power semiconductor device;
- a second semiconductor device configured to control the first semiconductor device;
- a current detector circuit configured to detect a current of the motor;
- and
- an angle detector circuit configured to detect an angle of the motor,
- wherein the second semiconductor device comprises:
- a control circuit including a central processing unit (CPU) and a memory;
- a pulse width modulation (PWM) output circuit configured to control the first semiconductor device;
- a current detection circuit configured to detect the current information from the current detector;
- and
- an angle detection circuit configured to detect the angle information from the angle detector,
- wherein the PWM output circuit comprises a square wave generator circuit,
- wherein the square wave generator circuit generates a square wave based on the angle information of the angle detection circuit and a base square wave information, and
- wherein the control circuit is configured to:
- (a) generate a theoretical sine wave;
- (b) generate the base square wave information based on a deviation between a motor current measurement waveform and the theoretical sine wave;
- (c) adjust the base square wave information by changing a duty cycle of the base square wave information;
- and
- (d) adjust the base square wave information by changing a phase of the base square wave information.
Dependencies are inferred from the claim text.