Stator permanent magnet linear oscillation motor design method and system considering saturation effect

Abstract

The invention discloses a stator permanent magnet linear oscillation motor design method and system considering a saturation effect, and the method comprises the steps: determining a design index and a parameter limiting range of a stator permanent magnet linear oscillation motor, and calculating a rated current effective value of the motor under a specific size parameter according to the efficiency and copper loss limitation; calculating the saturation coefficient and the electromagnetic thrust of the aligning part of the stator and the rotor iron core on the easy-to-saturate side of the motor by combining a no-load and load nonlinear equivalent magnetic circuit model; and judging whether the performance parameters such as the saturation degree of the iron core and the electromagnetic thrust meet the requirements or not through the design indexes corresponding to the specific application, if not, updating the size parameters, and recalculating the saturation coefficient and the output thrust until the design requirements are met. According to the method, the problems that a traditional sub-domain analysis method cannot process the saturation problem and a three-dimensional finite element method is low in calculation efficiency can be solved, the relation between the asymmetric iron core saturation effect of the stator and design size parameters is quantitatively described, and size design and output characteristic evaluation of the stator permanent magnet linear oscillation motor are completed.

Description

technical field [0001] The invention belongs to the field of linear oscillating motors, and relates to a design method and system of a stator permanent magnet linear oscillating motor considering saturation effects. Background technique [0002] Linear reciprocating motion is mainly realized by the traditional rotary motor + motion conversion mechanism. This method has been criticized for its low transmission efficiency, high noise, complex structure, large volume and poor reliability. If the direct drive of the linear oscillating motor is used instead, the intermediate motion conversion mechanism can be omitted and the linear reciprocating motion can be directly realized, which is small in size and high in efficiency. Such motors have great potential in various applications in vehicles, such as active suspension systems, linear compressors, free-piston engines, vibration energy harvesters, and more. Among them, the permanent magnet linear oscillation motor using permanent ...

AI Technical Summary

Problems solved by technology

[0004] However, according to the working principle of the linear oscillating motor, it is inevitable that part of the iron core is at high magnetic flux density due to the positive superposition of the armature and permanent magnetic fields, while the rest is at low magnetic flux density due to their mutual weakening

This phenomenon is more pronounced in stator permanent magnet linear oscillating motors, and usually manifests as completely different flux density levels in the two stators, resulting in asymmetrical saturation

The traditional subdomain approach adopted in the document "Electromagnetic analysis of single-phase linearoscillatory actuator based on subdomain analytical model with end and stacking effects" (published in 2021 IEEE Transactions on Magnetics, volume 57, issue 2, pages 1-5) is very It is difficult to deal with such problems, and the document "Electromagnetic design and dynamic characteristics of permanent magnet linear oscillating machines considering instantaneous inductance according to mover position" (published in 2020 IEEE Transactions on Applied Superconductivity Volume 30, Issue 4, Pages 1-5) adopts Generic 3D finite element analysis is time consuming

Images