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A method for online identification of permanent magnet synchronous motor parameters

A permanent magnet synchronous motor and identification method technology, which is applied in the control of generators, motor generators, electronically commutated motors, etc., can solve the problems of unsatisfactory motor control effects and difficult determination of motor parameters.

Active Publication Date: 2020-08-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] Aiming at the technical problems that the motor parameters are difficult to determine due to the influence of the external environment such as temperature during the operation of the motor, and the inaccurate estimation of the motor parameters will easily lead to unsatisfactory motor control effects, the present invention provides a permanent magnet synchronous motor. Parameter online identification method, based on the combination of finite set-model predictive control method and Kalman filter algorithm

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  • A method for online identification of permanent magnet synchronous motor parameters
  • A method for online identification of permanent magnet synchronous motor parameters
  • A method for online identification of permanent magnet synchronous motor parameters

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Embodiment Construction

[0056] The method provided by the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0057] The permanent magnet synchronous motor parameter online identification method of the present invention is based on the finite set-model predictive control method and the Kalman filter algorithm. The online identification method mainly includes: the establishment of the motor mathematical model, the parameter decoupling of the prediction error and the Kalman filter algorithm There are three aspects of online parameter identification, the specific process is as follows: figure 1 shown.

[0058] The method includes the following steps:

[0059] Step 1, establishing a simplified mathematical model of the permanent magnet synchronous motor under the dq axis coordinate system;

[0060] Step 2. Calculate the stator current prediction error based on the finite set-model predictive control method, and properly decouple the stator induct...

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Abstract

The invention provides an online identification method for a permanent magnet synchronous motor, and can realize the decoupling and the online identification of motor parameters, including stator inductance, rotor permanent magnet flux linkage and the like. The method comprises the following steps that: firstly, through a model prediction control method, a current prediction error formula is deduced, the stator inductance and the rotor flux linkage of the motor are further decoupled, mutual influences and mutual functions between motor parameters can be reduced, then, a Kalman filtering algorithm is used for carrying out online parameter identification on a discrete linear system, and a state vector is predicted and corrected. The filtered motor parameters can weaken the harmonic fluctuation of the motor due to external environment change in a running process so as to perform a significant meaning for eliminating the interference of external factors and improving motor control accuracy.

Description

technical field [0001] The invention relates to an online identification method for parameters of a permanent magnet synchronous motor, in particular to a technology for realizing online identification of parameters of a permanent magnet synchronous motor based on a Kalman filter algorithm. Background technique [0002] Motor parameters play a decisive role in the precise control of the motor. Therefore, in the current motor control system, it is necessary to accurately identify the motor parameters. The motor parameters include the stator inductance Ls, stator resistance Rs and rotor flux linkage Ψf of the motor. Currently applied more mature motor control technology including vector control technology and direct torque control technology. In the vector control system, the double closed-loop control of the speed outer loop and the current inner loop is adopted, and the precise control parameters (such as stator resistance and stator inductance, etc.) determine the smooth op...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/14H02P21/16
Inventor 张硕周莹张承宁李雪萍张春涛
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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