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Multi-phase cage type induction motor magnetic field calculation method and system

A technology for induction motor and magnetic field calculation, which is applied in the manufacture of motor generators, electrical components, electromechanical devices, etc. It can solve the influence of space harmonic electromagnetic performance of the subdomain model that cannot be further studied, and the limitations of motor optimization design, etc. problem, to achieve the effect of high optimization design efficiency, time saving and wide applicability

Active Publication Date: 2021-09-28
NAVAL UNIV OF ENG PLA
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Problems solved by technology

This method assumes that the air gap of the rotating cage induction motor only contains the fundamental magnetic potential, and the established subdomain model cannot further study the influence of the space harmonics of the magnetic potential on the electromagnetic performance of the motor, which has limitations in the optimal design of the motor

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  • Multi-phase cage type induction motor magnetic field calculation method and system
  • Multi-phase cage type induction motor magnetic field calculation method and system
  • Multi-phase cage type induction motor magnetic field calculation method and system

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no. 1 example

[0072] Such as figure 1 As shown, as the first embodiment of the present invention, a method for calculating the magnetic field of a polyphase cage induction motor is provided, the method comprising:

[0073] Step 1. Divide the solution area of ​​the motor according to the type of excitation source, so as to obtain the motor model, and obtain the distribution function of the current density of the stator winding based on the motor model;

[0074] Step 2, aiming at the influence of the kth current density harmonic, the vector magnetic potential in each subdomain is used as the solution object of the governing equation, and the Laplace equation, Poisson equation and Helmholtz equation are respectively established, and according to each The general solution of the vector magnetic potential is obtained by using the boundary conditions between the interfaces;

[0075] Step 3, based on the general solution of the vector magnetic potential of each subfield, solve the harmonic coeffi...

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Abstract

The invention discloses a multi-phase cage type induction motor magnetic field calculation method and system, and the method comprises the steps: dividing a motor solving region according to the type of an excitation source, thereby obtaining a motor model, and obtaining a distribution function of the current density of a stator winding based on the motor model; aiming at the influence of the k current density harmonics, taking the vector magnetic potential in each sub-domain as a solving object of a control equation, respectively establishing a Laplace's equation, a Poisson equation and a Helmholtz equation, and solving a general solution of the vector magnetic potential according to boundary conditions among interfaces; based on the general solution of the vector magnetic potential of each sub-domain, solving the harmonic coefficient of each sub-domain; and based on the harmonic coefficient of each sub-domain, solving the radial and tangential components of the air gap flux density according to the vector magnetic potential expression of the air gap sub-domain, and solving the torque caused by the k space harmonics of the magnetomotive force and the total electromagnetic torque according to the radial and tangential components of the air gap flux density and the Maxwell tensor method.

Description

technical field [0001] The invention relates to the field of motor magnetic field calculation, in particular to a multiphase cage induction motor magnetic field calculation method and system based on a sub-domain harmonic model. Background technique [0002] T. Lubin, etc. “Analytic calculation of eddy currents in the slots of electrical machines: Application to cage rotor induction motors,” IEEE Trans. Magn., vol.47, no.11, pp.4650–4659, Nov.2011. This method replaces the stator winding with the equivalent current layer at the edge of the stator as the excitation source, and calculates the eddy current distribution and electromagnetic properties in the rotor bar of the cage rotor induction motor based on the subdomain method, but does not consider the stator slot with tooth tips. It is impossible to calculate the influence of stator slotting on the electromagnetic performance of the motor; [0003] Xue Zhiqiang, Zhou Yu, Li Huaishu. Analytical calculation of the no-load ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/00G06F30/20
CPCH02K15/00G06F30/20
Inventor 陈瀚斯赵镜红许浩熊义勇张俊洪周杨威郭国强吴媚张书恒
Owner NAVAL UNIV OF ENG PLA
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