Motor heating control method, controller and system based on look-up table and closed-loop control

Abstract

The invention provides a motor heating control method, controller and system based on table look-up and closed-loop control, belonging to the field of motor control. The motor heating control method includes: obtaining in real time the direct-axis current increment corresponding to the closed-loop control mode according to the target heating power and actual heating power of the motor; querying the pre-calibrated Table 1 according to the target torque and actual speed of the motor to obtain the corresponding direct axis current look-up table value; obtain the target direct axis current of the motor according to the direct axis current increment and the direct axis current look-up table value; query the pre-calibrated value according to the target direct axis current and the target torque Table 2 obtains the corresponding target quadrature axis current, so as to pass current to the motor according to the target direct axis current and the target quadrature axis current. The motor heating control method of the invention can realize the continuous control of the heating power of the motor and the simultaneous control of the heating power and torque of the motor.

Description

technical field [0001] The invention relates to the field of motor control, in particular to a motor heating control method, controller and system based on look-up table and closed-loop control. Background technique [0002] Through motor control, the motor can adjust the input current of the motor while the output torque remains unchanged. Since the heating power of the motor is directly related to the current, the control of the motor heating power can also be realized by controlling the input current of the motor. [0003] At present, some models of Tesla abroad have realized the heating power of the motor by controlling it and using this part of the heating power to heat the passenger compartment or power battery. However, there is currently no method to adjust the heating power of the motor under the condition that the control torque remains unchanged. [0004] Considering the non-linearity of motor parameters, some motor controller suppliers currently use look-up tabl...

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Problems solved by technology

Because this table is sorted according to the goal of optimal efficiency, when the motor is controlled only according to this table, the precise control of the motor torque can be realized, but the adjustment and control of the heating power of the motor cannot be realized

[0005] In addition, on the basis of the current motor control, multiple data tables under different heating powers are formed through calibration, and then the corresponding tables are searched according to different target heating powers to obtain the corresponding direct-axis current and quadrature-axis current, but this control This method cannot achieve continuous control of heating power, and cannot eliminate the influence of motor parameter changes and interference on heating power, and increases the calibration workload

[0006] Therefore, the current motor control method cannot realize the continuous control of the motor heating power.

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