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Method and device for correcting external characteristic calibration data of permanent magnet synchronous motor and medium

A permanent magnet synchronous motor, calibration data technology, applied in the control of generator, motor generator control, AC motor control and other directions, can solve the problem of inaccurate calibration data of permanent magnet synchronous motor external characteristics, to avoid the risk of loss of control, to achieve simple effect

Pending Publication Date: 2022-07-22
LEADRIVE TECH (SHANGHAI) CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the above-mentioned technical defects, the purpose of the present invention is to provide a correction method, equipment and medium for the calibration data of the external characteristics of the permanent magnet synchronous motor, which is used to overcome the difference between the rotor temperature and the calibration rotor temperature in the actual operation process, which leads to the problem obtained by looking up the table. The problem of inaccurate calibration data of the external characteristics of the permanent magnet synchronous motor

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  • Method and device for correcting external characteristic calibration data of permanent magnet synchronous motor and medium
  • Method and device for correcting external characteristic calibration data of permanent magnet synchronous motor and medium
  • Method and device for correcting external characteristic calibration data of permanent magnet synchronous motor and medium

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Embodiment 1

[0068] Embodiment 1: This embodiment discloses a method for correcting the calibration data of the external characteristics of a permanent magnet synchronous motor, refer to figure 1 and figure 2 , including the following steps:

[0069] A mapping table is provided, wherein the mapping table includes a plurality of rotor temperatures (t) and permanent magnet flux linkages The mapping relationship of ; set the motor bus voltage (U lim ), rotational speed (ω), d-axis current (id) and q-axis current (iq) of the motor; specifically, the target bus voltage and target rotational speed under the target operating conditions are expressed as U, respectively lim_t , ω t .

[0070] S110: Obtain the busbar voltage and rotational speed under the calibration condition, and obtain the calibration permanent magnet flux linkage from the mapping table according to the calibrated rotor temperature under the calibration condition;

[0071] Specifically, in this embodiment, the temperature ...

Embodiment 2

[0106] Embodiment 2: This embodiment also provides a method for correcting the calibration data of the external characteristics of the permanent magnet synchronous motor, refer to image 3 and Figure 4 , including the following steps:

[0107] A mapping table is provided, wherein the mapping table includes a plurality of mapping relationships between the rotor temperature and the permanent magnet flux linkage; it should be noted that the mapping table has the same function and expression as in the first embodiment, and will not be described repeatedly here. It should also be noted that the symbols in this embodiment are the same as those in the first embodiment.

[0108] A parameter table is provided, wherein the parameter table takes the ratio of the bus voltage and each rotational speed under the calibration condition as input, and outputs the corresponding d-axis current, q-axis current and torque (such as Figure 4 Medium fixed The area where the physical value of the...

Embodiment 3

[0128] Embodiment 3: To achieve the above purpose, the present invention also provides a computer device, comprising: a memory for storing executable program codes; and a processor for calling the executable program codes in the memory to execute The steps include any one of the correction methods described. The computer equipment can be a smart phone, tablet computer, laptop computer, desktop computer, rack server, blade server, tower server or rack server (including a stand-alone server, or a server cluster composed of multiple servers) that executes programs. )Wait. The computer device in this embodiment at least includes, but is not limited to, a memory 31 and a processor 32 that can be communicatively connected to each other through a system bus, such as Figure 5 shown. It should be pointed out that, Figure 5 Only a computer device is shown with components - but it should be understood that implementation of all shown components is not a requirement and that more or ...

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Abstract

The invention provides a method and device for correcting external characteristic calibration data of a permanent magnet synchronous motor and a medium, and relates to the technical field of permanent magnet synchronous motor calibration data processing.The method comprises the steps that the bus voltage and the rotating speed under the calibration working condition are obtained, and a calibrated permanent magnet flux linkage is obtained; carrying out per unit replacement to integrate a calibration data per unit value table; the calibration data per-unit value takes the ratio of the bus voltage relative rotating speed to the calibration permanent magnet flux linkage as input, and the d-axis current per-unit data, the q-axis current per-unit data and the torque per-unit data are matched; obtaining a target bus voltage, a target rotating speed and a target rotor temperature, and obtaining a target permanent magnet flux linkage; determining corrected input data, and obtaining target d-axis current per-unit data, target q-axis current per-unit data and target torque per-unit data; and reverse per-unit replacement is carried out to obtain target external characteristic data, so that the problem that the external characteristic calibration data of the permanent magnet synchronous motor obtained through table look-up is inaccurate due to the fact that the actual rotor temperature is different from the calibration rotor temperature is solved.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motor calibration data processing, in particular to a method, device and medium for correcting external characteristic calibration data of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motors are widely used in industrial control due to their high power density and high efficiency. [0003] In the field of electric vehicles, permanent magnet synchronous motors are used as drive motors. In order to achieve precise control of output torque, the optimal parameters of motor control are generally written into a table by offline calibration. The data such as current speed, motor torque under voltage, current point, etc. can be obtained by looking up the table. [0004] The permanent magnet flux linkage is greatly affected by temperature, which in turn affects the external characteristic torque and current point of the motor. The of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P21/20H02P25/022
CPCH02P21/14H02P21/20H02P25/022H02P2207/05
Inventor 张智勇刘光远丰树帅
Owner LEADRIVE TECH (SHANGHAI) CO LTD
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