Motor drive device, and motor drive method
AssigneePanasonic Corporation
InventorKenichi Kishimoto
Life of this patent
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Abstract
A motor drive device includes a drive controller for generating drive signal “trq”, a limiter for limiting a value of drive signal “trq” within a range, a limit value generator for generating limit value “lmt”, and a drive output section for generating an energizing signal in response to an output signal from the limiter. The limit value generator generates a comparison signal by adding offset value “ofs” to drive signal “trq” and updates limit value “lmt” based on a size relation between a value (trq+ofs) of the comparison signal and limit value “lmt”.
Claims14
A motor drive device to control driving a motor in accordance with an external command, the motor drive device comprising:
- a drive controller for generating a drive signal to drive the motor;
- a limiter for liming a value of the drive signal within a range;
- a limit value generator for generating a limit value;
- and
- a drive output section for generating an energizing signal in response to an output signal from the limiter, and energizing a winding of the motor with the energizing signal,
- wherein the limit value generator generates a comparison signal by adding an offset value to the drive signal, and updates the limit value based on a size relation between a value of the comparison signal and the limit value.
A method of driving a motor of a motor drive device that controls driving the motor in accordance with an external command, the method comprising the steps of:
- generating a drive signal for driving the motor;
- limiting a value of the drive signal within a range;
- generating a limit value;
- and
- generating an energizing signal in response to an output signal corresponding to the drive signal a value of which is limited within the range, and energizing a winding of the motor with the energizing signal,
- wherein the step of generating the limit value includes steps of generating a comparison signal by adding an offset value to the drive signal, and updating the limit value based on a size relation between a value of the comparison signal and the limit value.
Dependencies are inferred from the claim text.