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US 11,374,515 B1Granted
Operation method and operation device of motor driver for driving motor
AssigneeIndustrial Technology Research Institute
InventorsChih-Chiang Wu, Yun-Huan Li, Hsin-Ping Chou, Shih-Hsiang Wu
Life of this patent
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Abstract
An operation method and an operation device of a motor driver for driving a motor are provided. The operation method includes: establishing a hysteresis control method; and adjusting a switch frequency of a power module for operating the motor by using the hysteresis control method according to a change of rotation speed of the motor and a current switch frequency.
Claims16
An operation method of a motor driver for driving a motor, the operation method comprising:
- establishing a hysteresis control method;
- and
- adjusting a switch frequency of a power module for operating the motor by using the hysteresis control method according to a change of rotation speed of the motor and a current switch frequency;
- wherein step of establishing the hysteresis control method comprises:
- obtaining a loss information of the power module when operating the motor at a rotation speed with a predetermined frequency;
- establishing a thermal model of the power module according to a three-dimensional model of the power module and the loss information to obtain a simulation temperature of the power module when operating the motor at the rotation speed with the predetermined frequency;
- and
- determining a value of the predetermined frequency according to the simulation temperature and a tolerable temperature of the power module in a manner that the simulation temperature is below the tolerable temperature, wherein the predetermined frequency in a condition that the simulation temperature is below the tolerable temperature is utilized as the switch frequency for operating the motor at the rotation speed.
5 more elements
An operation device of a motor driver for driving a motor, the operation device comprising:
- a control unit configured for adjusting a switch frequency of a power module for operating the motor by a hysteresis control method according to a change of rotation speed of the motor and a current switch frequency;
- a loss calculation unit configured for obtaining a loss information of the power module when operating the motor at a rotation speed with a predetermined frequency;
- and
- a temperature calculation unit configured for establishing a thermal model of the power module according to a three-dimensional model of the power module and the loss information to obtain a simulation temperature of the power module when operating the motor at the rotation speed with the predetermined frequency;
- wherein a value of the predetermined frequency is determined according to the simulation temperature and a tolerable temperature of the power module in a manner that the simulation temperature is below the tolerable temperature, and the predetermined frequency in a condition that the simulation temperature is below the tolerable temperature is utilized as the switch frequency for operating the motor at the rotation speed.
2 more elements
Dependencies are inferred from the claim text.