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Method and device for automatic calibration of vehicle-mounted motor

An automatic calibration and calibration technology, which is applied to the estimation/correction of motor parameters, can solve the problems of manual calibration of motor control current, such as high technical requirements, high work intensity, and poor calibration accuracy, so as to increase the number of sampling points and improve work efficiency. , The effect of eliminating reading errors

Active Publication Date: 2019-03-12
BEIJING ELECTRIC VEHICLE
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides an automatic calibration method and device for a vehicle-mounted motor, which solves the problems of high technical requirements for manual calibration of motor control current, high work intensity, long calibration period and poor calibration accuracy

Method used

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  • Method and device for automatic calibration of vehicle-mounted motor
  • Method and device for automatic calibration of vehicle-mounted motor
  • Method and device for automatic calibration of vehicle-mounted motor

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Embodiment 1

[0044] Such as figure 1 As shown, the embodiment of the present invention provides a method for automatic calibration of a vehicle-mounted motor, which specifically includes the following steps:

[0045] Step 101: Obtain output torque values ​​under different calibrated direct axis currents and different calibrated quadrature axis currents.

[0046] In order to improve the calibration accuracy, as many calibration direct-axis currents and calibration quadrature-axis currents as possible should be set. Generally, the output torque values ​​are different under different direct-axis currents and quadrature-axis currents.

[0047] Specifically, before step 101, it also includes: configuring the initial direct-axis current, the step size of the direct-axis current, the initial quadrature-axis current, and the step-size of the quadrature-axis current; Current; different quadrature currents are determined according to the initial quadrature current and the step size of the quadratur...

Embodiment 2

[0064] The first embodiment above introduces the automatic calibration method of the vehicle-mounted motor of the present invention, and the following embodiment will further introduce its corresponding device in conjunction with the accompanying drawings.

[0065] Specifically, such as figure 2 As shown, embodiments of the present invention provide a vehicle-mounted motor automatic calibration device, including:

[0066] An acquisition module 21, configured to acquire output torque values ​​under different calibrated direct-axis currents and different calibrated quadrature-axis currents;

[0067] Calculation module 22, used to calculate the torque constant under the corresponding calibrated DC current and calibrated quadrature axis current according to the output torque value;

[0068] The processing module 23 is configured to perform curve fitting according to the torque constant to obtain an optimal torque-direct axis current curve.

[0069] Among them, the vehicle-mount...

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Abstract

The invention discloses a vehicle-mounted motor automatic calibration method and apparatus. The method comprises the steps of obtaining an output torque value under different calibrated direct axis currents and different calibrated quadrature-axis currents; calculating torque constants under the corresponding calibrated direct axis currents and calibrated quadrature-axis currents according to the output torque value; and performing curve fitting according to the torque constants to get the best curve of torque-direct axis currents. According to the invention, in performing bench matching work of new energy vehicle drive motors, by giving the different calibrated direct axis currents and different calibrated quadrature-axis currents and increasing the number of sampling points, the calibration accuracy is raised; the corresponding output torque values are automatically read and the corresponding torque constants are calculated to eliminate reading errors to further improve the calibration accuracy; and according to the torque constants, curve fitting is performed to get the best curve of the torque-direct axis currents, thereby greatly improving the efficiency of motor calibration.

Description

technical field [0001] The invention relates to the field of automobile performance measurement, in particular to an automatic calibration method and device for a vehicle-mounted motor. Background technique [0002] In the field of new energy vehicle testing, the control current of the drive motor of the new energy vehicle needs to be calibrated on the bench. At present, the calibration of the control current in the motor bench calibration is carried out manually. The method of manual calibration is adopted, that is, in different work Under different conditions (different demand torque T and motor speed n), manually change the value of Id or Iq to match the optimal torque, so as to obtain the required Id and Iq tables. This method will produce reading errors during manual processing; and will affect the flux linkage due to the large temperature range of the motor, thereby affecting the calibration accuracy; it also takes a long time for calibration and data processing, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P23/14
CPCH02P23/14
Inventor 刘玉辉蒋荣勋苏伟曹永霞
Owner BEIJING ELECTRIC VEHICLE
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