Magnetic Field Determination Method of Cylindrical Linear Oscillating Motor Based on Polar Coordinate Transformation
A technology for oscillating motors and determination methods, which is applied in CAD circuit design, geometric CAD, and special data processing applications, etc., and can solve problems that affect the performance and required indicators of linear motors, reduce the effective output of the motor, and complicate the solution process. To achieve the effect of simplifying the solution time, avoiding complexity and reducing the solution area
Active Publication Date: 2021-04-27
SOUTHEAST UNIV
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Problems solved by technology
If the influence of the edge effect of the linear motor is ignored, the additional loss of the motor will increase, and the effective output of the motor will decrease, which will seriously affect the performance and requirements of the linear motor.
However, using the sub-domain method for partition processing can take into account the end effects on both sides of the motor. However, using this method requires a large number of magnetic field boundary conditions and junction conditions, and writing multiple sets of partial differential equations requires the Besser Carrier function to solve, the solution process is complex and cumbersome
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[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...
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The invention discloses a method for determining the magnetic field of a cylindrical linear oscillating motor based on polar coordinate conversion. First, the structural parameters of the cylindrical linear motor are determined, and an oscillation model of the cylindrical linear motor is established in a cylindrical coordinate system; then, the oscillating motor model is equivalent , using the coordinate transformation method, transform the solution coordinate system from the traditional cylindrical coordinate system to the polar coordinate system for analysis; then combine the separation of variables method and the sub-domain method to partition the model in this polar coordinate system, and write each area Laplace's equation or Poisson's equation; finally, using the boundary conditions and interface conditions of the magnetic field to solve the above-mentioned general solution equations for each region, so as to obtain the electromagnetic performance of the linear oscillating motor.
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...
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IPC IPC(8): G06F30/30
CPCG06F30/17G06F30/367
Inventor 余海涛郭蓉夏涛张维仲伟博施振川刘小梅王琦王尧王安华
Owner SOUTHEAST UNIV