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A Discrete Simulation Model Design Method for Permanent Magnet Motor

A technology of permanent magnet motor and simulation model, which is applied in the direction of motor control, model/simulation for control purposes, electrical components, etc. Effect

Active Publication Date: 2020-06-09
WEIHAI CREDITFAN VENTILATOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using mathematical equations for motor modeling, this method can quickly realize the modeling and verification of permanent magnet motors, but the disadvantage is that the accuracy of motor modeling is low

Method used

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  • A Discrete Simulation Model Design Method for Permanent Magnet Motor
  • A Discrete Simulation Model Design Method for Permanent Magnet Motor
  • A Discrete Simulation Model Design Method for Permanent Magnet Motor

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Embodiment Construction

[0055] First make some assumptions: (1) Neglect the effects of saturation, eddy current, and hysteresis; (2) The current of the motor is a symmetrical three-phase sine wave current: (3) The magnetomotive force of the permanent magnet is uncertain, that is, the equivalent excitation The current is constant; (4) The three-phase stator windings are distributed in a symmetrical star shape in space, and the armature resistance and armature self-inductance of each winding of the stator are equal.

[0056] In the permanent magnet motor mathematical model, the phase voltage, flux linkage and torque of the permanent magnet motor can be expressed in matrix form as:

[0057]

[0058] ψ abc =L abc i abc +ψ rabc (2)

[0059]

[0060]

[0061]

[0062] where V abc i abc 、ψ abc 、ψ rabc , R abc and L abc Three-phase voltage (V), three-phase current (A), three-phase stator flux linkage (WB), three-phase rotor flux linkage (WB), three-phase stator winding equivalent resist...

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Abstract

The invention relates to a design method for a discrete simulation model of a permanent magnet motor. The method comprises the steps of firstly obtaining phase voltage, flux linkage and torque of thepermanent magnet motor and obtaining phase voltage va, vb and vc of three-phase windings of the motor; building an equivalent mathematical model of the motor by using the phase voltage va, vb and vc of the three-phase windings, building a physical model through the equivalent mathematical model of the motor and completing design of the discrete simulation model of the permanent magnet motor by combining an electric model, a mechanical model and a motor signal detection module of the permanent magnet motor. According to the design method, the electric model, the mechanical model and the like are combined by using the physical model, so that the designed motor is higher in modeling accurately, especially, the modelling speed of the motor is effectively improved, the modelling difficulty of acomplex object is lowered, the data volume in processing process is simplified and actual simulation application is easier. The correctness and effectiveness of the method provided by the invention are verified through a simulation experiment. According to the design method, the control characteristics of modeling and simulation of the permanent magnet motor are improved and met.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a design method for a discrete simulation model of a permanent magnet motor. Background technique [0002] Permanent magnet motors have been widely used in industrial production and household appliances due to their high efficiency, high power density and high drive performance. Among them, permanent magnet synchronous motor and brushless DC motor are one of the most widely used motors. In order to further effectively predict, evaluate, and optimize the performance of permanent magnet motors, the simulation modeling of permanent magnet motors is very important. At present, people have done a lot of research work on the modeling of permanent magnet motors. The motor modeling method based on nonlinear finite element analysis is a relatively common one. The inductance, back electromotive force and cogging torque of the motor can be obtained accurately by usi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/34
CPCH02P6/34H02P2207/05
Inventor 林海李耀华周熙炜司利云陈金平陈俊硕
Owner WEIHAI CREDITFAN VENTILATOR
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