Polar-coordinate conversion-based magnetic-field determination method of cylindrical linear oscillation motor

A technology for oscillating motors and determining methods, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., and can solve problems affecting the performance and required indicators of linear motors, the reduction of effective output results of motors, and the increase of additional losses of motors. Achieve the effect of solving the problem of longitudinal end effect, fast speed and small amount of calculation

CN108363858AActive Publication Date: 2018-08-03SOUTHEAST UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-08-03

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Abstract

The invention discloses a polar-coordinate conversion-based magnetic-field determination method of a cylindrical linear oscillation motor. Firstly, structure parameters of the cylindrical linear motorare determined, and an oscillation model of the cylindrical linear motor under a cylindrical coordinate system is established; then equivalence processing is carried out on the oscillation motor model, and a coordinate transformation method is employed to convert a solving coordinate system from the traditional cylindrical coordinate system to a polar coordinate system for analysis; then a methodof separation of variables and a subdomain method are combined to carry out region dividing on the model under the polar coordinate system, and Laplace equations or Poisson equations of all regions are listed; and finally, boundary conditions and interface conditions of a magnetic field are utilized to solve general-solution equations of all the above-mentioned regions, and thus electromagnetic performance of the linear oscillation motor is obtained.
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Description

technical field

[0001] The invention belongs to the fields of electric engineering and motors, and relates to a permanent magnet synchronous linear motor. Background technique

[0002] The cylindrical permanent magnet linear motor is a new type of permanent magnet linear motor, which has the advantages of both permanent magnet motors and linear motors. Compared with the traditional "rotary motor + ball screw" transmission method, it adopts the direct drive method, which has the advantages of no intermediate transmission link, high rigidity, high thrust, fast response speed, outstanding advantages of energy saving, and maintenance-free. Therefore, it is widely used in hoisting systems, high-performance servo drives and other occasions.

[0003] The cylindrical permanent magnet linear motor is similar to the rotary motor. When the primary winding of the linear motor is fed with three-phase symmetrical AC current, a traveling wave similar to the rotating magnetic field will be...

Examples

Embodiment Construction

[0030] The present invention will be further described below in conjunction with embodiment and accompanying drawing.

[0031] (1) According to the design requirements of the linear oscillating motor, the structural parameters of the cylindrical linear oscillating motor are determined, and a quasi-two-dimensional physical model of the cylindrical linear oscillating motor is established according to the parameters in the cylindrical coordinate system.

[0032](2) The quasi-two-dimensional physical model of the cylindrical linear oscillating motor is partitioned, and the regions are divided according to the actual components of the motor. The details of each region are as follows: motor back iron region 1, permanent magnet region 2, air gap layer region 3, stator core Zone 4, back iron upper end area 11, back iron lower end area 12, permanent magnet upper end area 21, permanent magnet lower end area 22, stator upper end area 411, stator underside The end area 412 is divided into...