Vehicle permanent magnet synchronous motor torque estimation method based on power flow and medium

A permanent magnet synchronous motor, power flow technology, applied in the estimation/correction of motor parameters, model/simulation for control purposes, etc., can solve the problem that the calculation accuracy of motor parameters affects the accuracy of torque estimation

Inactive Publication Date: 2020-03-24
SHANGHAI LECKON ELECTRICAL TECH CO LTD
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Problems solved by technology

[0004] The existing permanent magnet synchronous motor torque estimation is roughly divided into two types. The first is based on the online estimation of the motor torque model. This method requires motor parameters, and the estimation of the motor

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  • Vehicle permanent magnet synchronous motor torque estimation method based on power flow and medium
  • Vehicle permanent magnet synchronous motor torque estimation method based on power flow and medium
  • Vehicle permanent magnet synchronous motor torque estimation method based on power flow and medium

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Embodiment Construction

[0076] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0077] A method for estimating the torque of a permanent magnet synchronous motor for vehicles based on power flow provided by the present invention includes a step of calculating the output torque of the shaft end of the motor;

[0078] Calculation steps of the output torque of the motor shaft end: Calculate the output of the motor shaft end according to any parameter or any combination of parameters in the DC bus input power, DC bus power loss, controller loss, motor copper loss, motor iron loss and fr...

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Abstract

The invention provides a vehicle permanent magnet synchronous motor torque estimation method based on power flow and a medium. The method comprises a motor shaft end output torque calculation step: calculating to obtain the output power of the motor shaft end according to any one parameter or any combination of multiple parameters of the input power of the direct current bus, the power loss of thedirect current busbar, the controller loss, the motor copper loss, the motor iron loss and the friction loss, and calculating to obtain the output torque value of the motor shaft end through the output power of the motor shaft end. According to the method, the actual torque is estimated, the deviation can be calculated with the torque instruction of the vehicle control unit, and torque compensation is carried out, so that higher torque control precision is achieved.

Description

technical field [0001] The present invention relates to the technical field of permanent magnet synchronous motors, in particular to a method and medium for estimating the torque of permanent magnet synchronous motors for vehicles based on power flow. Background technique [0002] With the wide application of new energy electric vehicles, motors and controllers are the core of power control. The requirements for automotive permanent magnet synchronous motors and their control performance are getting higher and higher at home and abroad. The performance directly affects its performance in the field of electric vehicles. development of. [0003] Electric vehicles require that the deviation between the torque command of the vehicle controller and the actual output torque of the motor shaft end is very low, that is, the torque control accuracy is very high, and the deviation between the actual torque and the torque command of the vehicle controller is estimated, and torque compe...

Claims

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Application Information

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IPC IPC(8): H02P6/34H02P23/14
CPCH02P23/14H02P6/34
Inventor 鲁克银徐强韩黎汪晶晶
Owner SHANGHAI LECKON ELECTRICAL TECH CO LTD
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