Three-dimensional analytical calculation method for electromagnetic torque of permanent magnet eddy current coupling

A technology of permanent magnet eddy current and electromagnetic torque, applied in design optimization/simulation, etc., can solve problems such as cumbersome steps, complicated calculation preparation process, large deviation between torque calculation results and actual values, and achieve torque calculation results close to , avoid the effect of unstable calculation process, fast and accurate calculation
CN110795849APending Publication Date: 2020-02-14NANJING INST OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NANJING INST OF TECH
Publication Date
2020-02-14

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Abstract

The invention provides a three-dimensional analytical calculation method for electromagnetic torque of a permanent magnet eddy current coupling. The three-dimensional analytical calculation method includes the steps: based on a sub-domain method electromagnetic field calculation model, firstly, enabling a permanent magnet eddy current coupling to be equivalent to four sub-domains of a permanent magnet array, an air gap, a conductor and a conductor back iron under a rectangular coordinate system; then calculating specific forms of coefficients related to the harmonic order in the magnetic vector potential expressions of the conductor and the conductor back iron field domain; and finally, obtaining an electromagnetic torque value under the given air gap and slip ratio. According to the three-dimensional analytical calculation method, the three-dimensional eddy current paths in the conductor and the conductor back iron are effectively simulated, and the established three-dimensional electromagnetic field calculation model is close to the actual situation, and the electromagnetic torque of permanent magnet eddy current couplers of various topological structures under the working conditions of different slip speeds, air gaps and the like can be accurately and rapidly predicted.
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Description

technical field

[0001] The invention relates to a three-dimensional analytical calculation method for electromagnetic torque of a permanent magnet eddy current coupling, which belongs to the technical field of eddy current analysis of moving conductors. Background technique

[0002] The permanent magnet eddy current coupling has the characteristics of no electromagnetic harmonics, good vibration reduction effect, low total cost, low maintenance cost, long service life, etc., and has broad application prospects in many industrial fields. The permanent magnet eddy current coupling is mainly composed of a permanent magnet rotor and a conductor rotor. The conductor rotor is mainly composed of a copper layer and a back iron layer, and the permanent magnet rotor is mainly composed of a permanent magnet array and its back iron. The permanent magnet eddy current coupling usually connects the permanent magnet rotor with the load shaft, connects the conductor rotor with the motor shaf...

Claims

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