Motor maximum torque current ratio control method and device, and computer readable medium

A technology of maximum torque current and control method, applied in motor control, motor generator control, AC motor control, etc., which can solve the problem of low efficiency of permanent magnet synchronous motors and the failure to truly realize the maximum torque current ratio control of permanent magnet synchronous motors And other issues

Pending Publication Date: 2020-08-11
SIEMENS ELECTRICAL DRIVES SHANGHAI
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Problems solved by technology

[0004] Aiming at the current maximum torque-to-current ratio control method for permanent magnet synchronous motors, the relationship between the quadrature-axis current and the direct-axis current under the condition of satisfying the maximum torque-to-current ratio control is linearized, and then through the relationship between the quadrature-axis current and the direct-axis current The lin

Method used

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  • Motor maximum torque current ratio control method and device, and computer readable medium
  • Motor maximum torque current ratio control method and device, and computer readable medium
  • Motor maximum torque current ratio control method and device, and computer readable medium

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Embodiment Construction

[0105] As mentioned above, in order to achieve the maximum torque-to-current ratio control of the permanent magnet synchronous motor, it is necessary to solve the nonlinear equations that characterize the relationship between the quadrature axis current and the direct axis current and the electromagnetic torque, so as to obtain the The target quadrature axis current and the target direct axis current of the maximum torque current ratio control of the permanent magnet synchronous motor, but because the above nonlinear equations are relatively complex, it is difficult to solve the nonlinear equations in the controller by using the usual extremum principle , so that the nonlinear equations are converted into linear relational expressions, and the approximate target quadrature axis current and target direct axis current are obtained by solving the linear relational expressions, so as to approximately realize the maximum torque of the permanent magnet synchronous motor current ratio...

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Abstract

The invention provides a motor maximum torque-current ratio control method and device, and a computer readable medium. The method comprises the steps: obtaining a first electromagnetic torque used forrepresenting an electromagnetic torque needed to be generated by a permanent magnet synchronous motor; determining a target quadrature-axis current and a target direct-axis current according to the first electromagnetic torque and a preset first mapping relationship, wherein the first mapping relationship is used for representing a geometrical relationship between the quadrature-axis current andthe electromagnetic torque and between the direct-axis current and the electromagnetic torque in the permanent magnet synchronous motor; and controlling the permanent magnet synchronous motor to operate according to the target quadrature-axis current and the target direct-axis current. The scheme can improve the efficiency of the permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a method, a device and a computer-readable medium for controlling the maximum torque-to-current ratio of a motor. Background technique [0002] Permanent magnet synchronous motor (permanent-magnet synchronous motor, PMSM) has the advantages of simple structure, small size, light weight, low power factor, etc., and is widely used in various industries of industrial production. The electromagnetic torque of the permanent magnet synchronous motor is determined by the flux linkage and the torque current, and the flux linkage is determined by the permanent magnet and the weak / strong magnetic current component, so under the premise that the permanent magnet synchronous motor produces the same electromagnetic torque, the torque current It may not be the same. The permanent magnet synchronous motor is controlled by the method of maximum torque current ratio control (Maximu...

Claims

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Application Information

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IPC IPC(8): H02P21/22H02P21/14H02P21/20H02P25/022
CPCH02P21/22H02P21/14H02P21/20H02P25/022H02P2207/05Y02T10/72
Inventor 薛海芬
Owner SIEMENS ELECTRICAL DRIVES SHANGHAI
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