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
Estimating the term…
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.
Claims18
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.
(canceled)
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.
(canceled)
Dependencies are inferred from the claim text.