MOTOR DRIVING DEVICE, AND MOTOR DRIVING METHOD
First Claim
1. A motor driving device which generates a first PWM control signal for PWM driving each phase of stator windings of a motor and a second PWM control signal for synchronously rectifying the phases on the basis of a current command signal indicating a level of a current to be supplied to the motor and a phase current signal indicating a level of a current actually supplied to the motor and drives the motor according to the first and second PWM control signals, the motor driving device comprising:
- a synchronous rectification control switching section for controlling the presence or absence of a mask for the second PWM control signal according to a provided control switching signal.
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Accused Products
Abstract
A motor driving device generates a first PWM control signal for PWM driving each phase (1u, 1v, 1w) of stator windings of a motor (1) and a second PWM control signal for synchronously rectifying the phases (1u, 1v, 1w) on the basis of a current command signal indicating the level of a current to be supplied to the motor (1) and a phase current signal indicating the level of a current actually supplied to the motor (1) and drives the motor (1) according to the first and second PWM control signals. The motor driving device includes a synchronous rectification control switching section (21) for controlling the presence or absence of a mask for the second PWM control signal according to a provided control switching signal.
31 Citations
15 Claims
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1. A motor driving device which generates a first PWM control signal for PWM driving each phase of stator windings of a motor and a second PWM control signal for synchronously rectifying the phases on the basis of a current command signal indicating a level of a current to be supplied to the motor and a phase current signal indicating a level of a current actually supplied to the motor and drives the motor according to the first and second PWM control signals, the motor driving device comprising:
a synchronous rectification control switching section for controlling the presence or absence of a mask for the second PWM control signal according to a provided control switching signal. - View Dependent Claims (2, 3, 4, 5, 12, 13, 14, 15)
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6. A motor driving method in which a first PWM control signal for PWM driving each phase of stator windings of a motor and a second PWM control signal for synchronously rectifying the phases are generated on the basis of a current command signal indicating a level of a current to be supplied to the motor and a phase current signal indicating a level of a current actually supplied to the motor for driving the motor according to the first and second PWM control signals, wherein
the second PWM control signal is masked when the motor is driven at low speed and is unmasked when the motor is driven at high speed.
Specification