Air-gap asymmetrical switched reluctance linear motor magnetic path modeling method

Abstract

The invention discloses an air-gap asymmetrical switched reluctance linear motor magnetic path modeling method, particularly applicable to switched reluctance linear motors of various phase number structures and belongs to the field of switched reluctance linear motor establishing and control.The air-gap asymmetrical switched reluctance linear motor magnetic path modeling method is characterized in that a magnetic path model of an air-gap asymmetrical switched reluctance linear motor is formed by combining all calculation formulas of reluctance components in four magnetic paths at the active cell position xu where the central line of an active cell groove of the switched reluctance linear motor is aligned to the central line of stator teeth, the active cell position x0 where the front edges of active cell teeth are aligned to the front edges of the stator teeth, the active cell position x1/2 where the active cell teeth are overlapped with the stator teeth for one half of the width of the stator teeth, and the active cell position xa where the central line of the active cell teeth is aligned to the central line of the stator teeth without magnetic characteristic calculation performed by adopting a motor electromagnetic field finite element method.The method is quick in calculation, is suitable for the air-gap asymmetrical switched reluctance linear motors of various phase number structures, can achieve systematic and quick design, real-time simulation and real-time control of the air-gap asymmetrical switched reluctance linear motors and has a good engineering application value.

Description

technical field [0001] The invention relates to a magnetic circuit modeling method of an air-gap asymmetric switched reluctance linear motor, especially suitable for switched reluctance linear motors with asymmetrical air gaps of various phase structures, belonging to the modeling and control of switched reluctance linear motors field. Background technique [0002] The double-sided switched reluctance linear motor is based on the single-sided switched reluctance linear motor with one side of the stator added. It has the advantages of simple structure, strong fault tolerance, high reliability, and simple control. The effective thrust, the two excitation stator sides and the normal attraction force produced by the mover offset, improving the reliability of the motor. However, when the air gaps on both sides of the switched reluctance linear motor mover are asymmetrical, the electromagnetic field distribution of the motor is uneven, and the normal resultant force on the motor ...

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Problems solved by technology

However, when the air gaps on both sides of the switched reluctance linear motor mover are asymmetrical, the electromagnetic field distribution of the motor is uneven, and the normal resultant force on the motor mover generated by the stator windings on both sides is not zero, which affects the bilateral switched reluctance linear motor. The guide rail is unfavorable. At the same time, the vibration and noise of the switched reluctance linear motor are increased, and the service life of the switched reluctance linear motor is shortened. Therefore, the magnetization characteristics of the bilateral switched reluctance linear motor under the condition of asymmetrical air gaps on both sides of the mover are analyzed. It is essential to improve the efficiency of the motor and extend the service life of the motor

At present, the magnetic characteristics of the switched reluctance linear motor are mainly calculated by using the motor electromagnetic field finite element method to calculate the magnetization characteristics of the switched reluctance linear motor, and the two-dimensional finite element electromagnetic field calculation is difficult to fully reveal the magnetic characteristics of the switched reluctance linear motor. Elementary electromagnetic field calculation of the magnetization characteristics of switched reluctance linear motors, whether it is two-dimensional finite element or three-dimensional finite element electromagnetic field calculation, the calculation time is long and the calculation storage space is large, and it is impossible to realize the magnetic properties of the air gap asymmetric switched reluctance linear motor. The rapid calculation of characteristics, let alone the rapid design, real-time simulation and real-time control of the air-gap asymmetric switched reluctance linear motor system

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