Salient pole motor magnetic linkage calculation method based on magnetic density distribution characteristics
A technology of distributed feature, salient pole motor, applied in the control of generator, motor generator control, electronic commutation motor control and other directions, can solve the problems of difficult calculation, difficult to use modeling method, large calculation deviation, etc., to achieve a simple structure. , Solve the problem of electromagnetic field analysis, the effect of small calculation amount
Inactive Publication Date: 2018-07-13
深圳市默贝克驱动技术有限公司
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Problems solved by technology
[0005] (2) Calculation of air-gap reluctance: the diversity of the geometric paths of the magnetic field lines through the air gap makes it difficult to calculate the air-gap reluctance
[0006] (3) Non-uniform distribution of magnetic saturation: The distribution of magnetic force lines in the air gap determines the uneven distribution of its magnetic flux on the stator and rotor teeth, which in turn leads to uneven magnetic density distribution
This phenomenon leads to changes in the equivalent reluctance of the stator and rotor teeth, which is difficult to calculate
[0007] (4) Dynamics of magnetic saturation: Near the tip of the salient pole near the air gap, its value and distribution change with the rotor position and current excitation intensity, which is not easy to calculate
However, this model will produce large calculation deviations on switched reluctance motors
This is because: 1) The equivalent air gap reluctance changes with the rotor position, so it is difficult to use traditional modeling methods; 2) It is difficult to describe the inhomogeneity and time-varying magnetic saturation distribution by using a concentrated reluctance to represent the salient pole reluctance
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[0024] The present invention will be further described below in conjunction with accompanying drawing.
[0025] Such as image 3 As shown, a method for calculating the flux linkage of a salient pole motor based on the flux density distribution characteristics includes the following steps:
[0026] S10, parameter initialization: calculate the number of stator teeth 10 and rotor teeth 30, the radial length of stator teeth 10 and rotor teeth 30, the circumferential width of stator teeth 10 and rotor teeth 30, the radius and diameter of air gap according to the geometric dimensions length; calculate the relative position between the stator tooth 10 and the rotor tooth 30; input the BH magnetization curve of the magnetic permeable material;
[0027] S20. Calculating the air-gap reluctance: according to the relative positions of the stator teeth 10 and the rotor teeth 30, there are two situations: non-overlapping positions and overlapping positions. Calculate the air-gap reluctanc...
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The invention discloses a salient pole motor magnetic linkage calculation method based on magnetic density distribution characteristics. The method includes the steps: parameter initialization; air-gap reluctance calculation; salient pole reluctance calculation; equivalent tooth-tip reluctance magnetic conductivity adjustment; tooth root reluctance geometric size adjustment: adjusting tooth root reluctance width by an iteration method; salient pole reluctance determination; magnetic linkage calculation. The method is obvious in effect, convenient and practical, has the advantages of simple structure and less calculated amount of a traditional equivalent magnetic circuit model and can also rapidly calculate any rotor positions and the magnetic linkage under any excitation current intensity,and salient pole motor electromagnetic field analysis is achieved.
Description
technical field [0001] The invention relates to a method for calculating the flux linkage of a motor, which belongs to the field of click control, in particular to a method for calculating the flux linkage of a salient pole motor based on the distribution characteristics of flux density. Background technique [0002] The salient pole motor generates torque through the change of air-gap reluctance. It belongs to the rare earth-free DC motor. It has the advantages of simple structure, low cost, easy start, wide speed regulation, strong fault tolerance, and high temperature resistance. It is widely used in electrical appliances, aerospace, etc. , electric vehicles and other fields. Motor design with high power density is one of the core issues of today's electric drive systems. Its electromagnetic analysis is the basis for optimizing the structure of the motor body and high-performance control. Flux calculation is the primary issue of electromagnetic analysis. [0003] The sal...
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Login to View More IPC IPC(8): H02P21/14
CPCH02P21/141
Inventor 樊胜利韦元林李均民余强田里思
Owner 深圳市默贝克驱动技术有限公司