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Motor lumped parameter model modeling method

A technology of centralized parameter models and modeling methods, which is applied in special data processing applications, design optimization/simulation, etc., can solve the problems of inability to effectively respond to motor saturation, harmonics, inability to guarantee inductance curves, smooth flux linkage curves, and influence on motor models Solve problems such as efficiency and convergence performance, to achieve the effect of improving solution efficiency and convergence performance, and improving model accuracy

Pending Publication Date: 2021-08-06
梁文毅
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  • Application Information

AI Technical Summary

Problems solved by technology

This modeling method can consider the basic characteristics of the motor, but cannot effectively reflect the characteristics of motor saturation, harmonics, etc.
In view of this, the motor modeling method based on the multi-loop model has been applied in the system simulation, in which the motor parameters are extracted from the finite element model and then transferred to the motor centralized parameter model. Through the finite element analysis, the method can consider the motor space harmonics and However, due to the influence of numerical calculation errors, the finite element method cannot guarantee the smoothness of the output inductance curve and flux linkage curve. When deriving the motor model, it will introduce more obvious harmonic errors in the system simulation. And affect the solution efficiency and convergence performance of the motor model

Method used

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Embodiment 1

[0025] Example 1: See figure 1 , Figure 2a and Figure 2b , the present invention provides a technical solution: a motor centralized parameter model modeling method, comprising the following steps:

[0026] S1. According to the motor structure parameters, construct the motor finite element model; the motor structure parameters in the step S1 include the motor stator and rotor punching structure parameters, winding arrangement parameters, magnetic steel structure parameters and boundary conditions;

[0027] S2. Set the stator and rotor excitation parameters and rotor position, and calculate the finite element model; set the maximum scan angle according to the motor type, phase number, and pole pair number, for example, for a three-phase permanent magnet synchronous motor, you can set the maximum scan angle of the rotor Then, construct the flux linkage and inductance curves according to the odd harmonic function characteristics of the flux linkage and inductance; take into ac...

Embodiment 2

[0035] Example 2: see figure 1 , Figure 3a and Figure 3b , the present invention provides a technical solution: a motor centralized parameter model modeling method, comprising the following steps:

[0036] S1. According to the motor structure parameters, construct the motor finite element model; the motor structure parameters in the step S1 include the motor stator and rotor punching structure parameters, winding arrangement parameters, magnetic steel structure parameters and boundary conditions;

[0037] S2. Set the stator and rotor excitation parameters and rotor position, and calculate the finite element model; set the maximum scanning angle according to the motor type, phase number, and pole pair number; then, construct each Flux linkage and inductance curves; scan different current combinations of windings; when scanning multi-phase winding motors or squirrel cage bars, use equivalent current vectors to scan;

[0038] S3. Extract the inductance and flux linkage param...

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Abstract

The invention discloses a motor lumped parameter model modeling method, which comprises the following steps of S1, constructing a motor finite element model according to motor structure parameters; S2, setting stator and rotor excitation parameters and a rotor position, and calculating the finite element model; setting a maximum scanning angle; then, constructing flux linkage and inductance curves; scanning different current combinations of windings; S3, according to a finite element scanning result, extracting inductance and flux linkage parameters, and calculating corresponding resistance according to the winding, squirrel cage bar and end ring parameters; S4, smoothing the obtained inductance and flux linkage parameter curves; S5, constructing a motor model in a circuit simulator; S6, based on a node voltage method, constructing an electrical system nonlinear solution model. According to the method, the obtained inductance and flux linkage parameter curves are smoothed, numerical calculation errors of the curves are eliminated, the model precision is improved, and the solving efficiency and convergence performance of the model can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of computer virtual simulation, in particular to a modeling method for a concentrated parameter model of a motor. Background technique [0002] Three-phase induction motors, electric excitation synchronous motors, permanent magnet synchronous motors, switched reluctance motors, brushless DC motors and other motors are widely used in electrical systems such as aviation, aerospace, ships, weapons, and rail transit. For the main power generation and power consumption equipment, the accuracy of the simulation model plays a vital factor in the accurate analysis of the electrical system. [0003] At present, in electrical comprehensive simulation, an ideal model is usually established according to the type of motor and its basic characteristics. For example, for a three-phase induction motor, only its magnetomotive force and permeance fundamental wave are considered. Usually, the fundamental wave and the second h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23
CPCG06F30/23
Inventor 梁文毅高秋
Owner 梁文毅
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