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Permanent magnet synchronous motor simulator based on four-order diagonal implicit RK algorithm

A permanent magnet synchronous motor and motor simulation technology, which is applied in simulators, electric controllers, motor generator tests, etc., can solve problems such as difficult simulation, achieve low cost, high computing efficiency, and avoid numerical oscillation

Pending Publication Date: 2020-08-21
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0004] In recent years, permanent magnet synchronous motor simulators have been studied by more and more scholars, but when they actually establish a mathematical model, they always establish a linear ordinary differential equation of the motor, and the permanent magnet synchronous motor is actually equivalent to A complex nonlinear load, which is difficult to simulate

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  • Permanent magnet synchronous motor simulator based on four-order diagonal implicit RK algorithm
  • Permanent magnet synchronous motor simulator based on four-order diagonal implicit RK algorithm
  • Permanent magnet synchronous motor simulator based on four-order diagonal implicit RK algorithm

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] The one-step fourth-order diagonal implicit RK algorithm flow chart of the permanent magnet synchronous motor proposed by the present invention, its essence is to constantly use the independent variable x n come for x n+1 The value of , that is, use the old value to solve the new value, iterate repeatedly, increase the data accuracy, and find the true value point. Each iteration requires the above five steps to calculate the formula once, and finally it can be summarized into the fourth-order implicit RK in the figure. algorithm. Compared with the traditional algorithm, the fourth-order diagonal implicit RK algorithm proposed by the present invention can change the step size in the calculation process to obtain a high-precision and stable value, and the implicit RK algorithm can be applied to nonlinear and non-linear In a stable situation, it has high calculat...

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Abstract

The invention discloses a permanent magnet synchronous motor simulator based on a four-order diagonal implicit Runge-Kuta algorithm. The simulator is characterized in that: an ordinary differential equation of a permanent magnet synchronous motor is established, then the ordinary differential equation is discretized, and a numerical solution changing along with time is resolved step by step according to the initial conditions of the ordinary differential equation. Compared with other motor simulators, the motor simulator selects a different algorithm, the four-order diagonal implicit Runge-Kuta algorithm has the advantages that several points are selected from each integral step moment, different weights are selected for integration, solving of high-order derivatives is avoided, and high precision is guaranteed. The permanent magnet synchronous motor simulator based on the four-order diagonal implicit Runge-Kuta algorithm can be self-started, so that the step length can be convenientlychanged in the calculation process, and a relatively accurate value can be obtained.

Description

technical field [0001] The invention relates to the field of power electronic loads, in particular to a permanent magnet synchronous motor simulator based on a fourth-order diagonal implicit Runge-Kutta (RK) algorithm. Background technique [0002] The motor simulator can replace the real motor for the performance test of the motor controller. It establishes an accurate dynamic mathematical model of the motor, and uses numerical values ​​to reflect the state of the mechanical port of the motor, so as to realize the digital setting of the mechanical load of the motor; at the same time, it uses the power electronic converter To simulate the port characteristics of the motor, control the port input current to be consistent with the current characteristics when the controller is directly connected to the motor, and is mainly used in various working conditions of the motor. The voltage and current output characteristics of the motor controller can be used not only in the developm...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B17/02G05B11/42G05B23/02G01R31/34G06F30/20G06F17/11
CPCG05B17/02G05B11/42G05B23/0213G01R31/34G06F30/20G06F17/11
Inventor 李文娟孔文豪
Owner HARBIN UNIV OF SCI & TECH
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