Correction method for output torque of permanent magnet synchronous motor affected by temperature

A permanent magnet synchronous motor, output torque technology, applied in the control of generators, motor control, motor-generator control and other directions, can solve the problems of limited computing power, complex algorithms, affecting the computing efficiency of the on-board controller single-chip microcomputer, etc., to achieve a simple algorithm , Improve the load rate and ensure the effect of control performance

Active Publication Date: 2022-01-07
SHANGHAI DAJUN TECH
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mature and available algorithms are often more complicated. Considering the limited computing power of the single-chip microcomputer used by the vehicle-mounted controller, most algorithms increase the load rate of the single-chip microcomputer and affect the computing efficiency of the single-chip microcomputer of the vehicle-mounted controller.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Correction method for output torque of permanent magnet synchronous motor affected by temperature
  • Correction method for output torque of permanent magnet synchronous motor affected by temperature
  • Correction method for output torque of permanent magnet synchronous motor affected by temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0043] The method for correcting the output torque of the permanent magnet synchronous motor affected by the temperature of the present invention comprises the following steps:

[0044] Step 1. Measure the normal temperature t 0 The flux linkage value ψ of the rotor permanent magnet of the lower motor ft0 , according to the known formula (1) of the flux linkage and temperature of the permanent magnet of the rotor, calculate the minimum temperature t within the operating range of the motor min and the maximum temperature t max The flux linkage value ψ of the rotor permanent magnet of the lower motor ftmin 、ψ ftmax ;

[0045]

[0046] Where: ψ ft is the flux linkage value at the measured temperature, t is the measured temperature, t 0 is the normal temperature, and α is the coefficient;

[0047] Step 2, respectively at the lowest temperature t min , room temperature t 0 and the maximum temperature t max Calibrate the motor at the ambient temperature, draw three I d...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for correcting the output torque of a permanent magnet synchronous motor affected by temperature. The method respectively calibrates the motor at the normal temperature and the lowest and highest working temperature of the motor, and obtains the shaft currents of the motor under the three temperature conditions respectively. According to the expected value of the output torque of the motor, the unique combination of the shaft current of the motor that falls on the MTPA curve of the motor is obtained by looking up the table, and is output as the expected value of the DQ axis current of the motor vector control system, thereby correcting the output torque of the motor. The method corrects the flux linkage of the permanent magnet of the motor rotor affected by temperature to achieve the purpose of compensating the output torque of the motor. The algorithm is simple and does not need to increase the load rate of the single-chip microcomputer of the on-board controller to ensure the control performance of the whole vehicle.

Description

technical field [0001] The invention relates to a method for correcting the output torque of a permanent magnet synchronous motor affected by temperature. Background technique [0002] With the gradual popularization of new energy vehicles on a global scale, permanent magnet synchronous motors are widely used in the transmission of new energy vehicles due to their high power density, high efficiency, small size and light weight. system. [0003] But because the permanent magnet material in the rotor is made of magnetic steel, permanent magnet synchronous motors also have some disadvantages. For example, under the condition of the whole vehicle, the car must be able to operate normally in various extreme weathers, and the range of the working environment temperature of the motor is often designed to be very wide (for example, from -40°C to 120°C), but according to the hysteresis loop, it can be seen that , The magnetic flux density of the rotor permanent magnet magnet steel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P25/022
CPCH02P21/14H02P25/024H02P2207/05
Inventor 管希铭王双全陈双赵宇黄洪剑
Owner SHANGHAI DAJUN TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products