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A Calculation Method for Rotor Dynamic Eccentric Displacement of Permanent Magnet Synchronous Motor

A permanent magnet synchronous motor, displacement calculation technology, applied in the direction of design optimization/simulation, geometric CAD, etc., can solve the problem of not considering the influence of the manufacturing process, and achieve the effect of avoiding differences

Active Publication Date: 2022-03-11
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to propose a method for calculating the dynamic eccentric displacement of the permanent magnet synchronous motor rotor considering the dispersion of the structural parameters of the motor, so as to solve the problem that the manufacturing process has no influence on the rotor in the current related research on the calculation of the dynamic eccentric displacement of the permanent magnet synchronous motor rotor. The Influence of Dynamic Eccentric Displacement Calculation

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  • A Calculation Method for Rotor Dynamic Eccentric Displacement of Permanent Magnet Synchronous Motor
  • A Calculation Method for Rotor Dynamic Eccentric Displacement of Permanent Magnet Synchronous Motor
  • A Calculation Method for Rotor Dynamic Eccentric Displacement of Permanent Magnet Synchronous Motor

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specific Embodiment approach 1

[0025] Specific Embodiment 1: This embodiment provides a method for calculating the dynamic eccentric displacement of the permanent magnet synchronous motor rotor. The method first determines its body structure simulation model according to the composition characteristics, structural parameters and electromagnetic scheme of the permanent magnet synchronous motor; Based on the actual manufacturing process parameter data of the permanent magnet synchronous motor, the three-phase self-inductance and mutual inductance waveform of the permanent magnet synchronous motor is obtained through finite element simulation; at the same time, the permanent magnet synchronous motor SVPWM double closed-loop control circuit is established based on Simulink; finally, according to Maxwell finite The inductance value of the permanent magnet synchronous motor calculated by the meta-simulation model is converted to obtain the DQ inductance value of the permanent magnet synchronous motor, which is subs...

specific Embodiment approach 2

[0040] Specific implementation mode two: combination Figure 1-Figure 5 This embodiment is described. In this embodiment, a certain type of permanent magnet synchronous motor is used as an object to perform no-load current simulation analysis considering the dispersion of structural parameters. The specific steps are as follows:

[0041] Step 1: Establish the simulation model of the permanent magnet synchronous motor based on Maxwell according to the structural parameters and material properties of the permanent magnet synchronous motor, and construct its three-phase self-inductance and mutual inductance waveform (output characteristics) about the inner diameter of the stator, the eccentricity of the magnetic tile pole arc, The model relationship of mass density of silicon steel sheet, eccentricity of stator and rotor, diameter of rotor shaft, outer diameter of stator, phase resistance, lamination coefficient, residual magnetic induction intensity, model height, outer diameter ...

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Abstract

The invention discloses a method for calculating the dynamic eccentric displacement of a permanent magnet synchronous motor rotor, which belongs to the technical field of permanent magnet synchronous motor detection. The method is: according to the composition characteristics, structural parameters and electromagnetic scheme of the permanent magnet synchronous motor, determine its body structure simulation model; according to the actual manufacturing process parameters of the permanent magnet synchronous motor, obtain the three-phase self-inductance and mutual inductance of the permanent magnet synchronous motor through finite element simulation Waveform; Based on Simulink, the permanent magnet synchronous motor SVPWM double closed-loop control circuit is established, and the no-load current of the permanent magnet synchronous motor is simulated. A simulation model of rotor dynamic eccentric displacement is established, and the no-load current of the permanent magnet synchronous motor is simulated according to the second step, and the characteristic frequency content corresponding to different rotor dynamic eccentric displacements is obtained by fitting according to the least square method. Establish the motor simulation model according to the actual structure parameter size of the motor, obtain the characteristic frequency content of the batch no-load current, and calculate the batch rotor dynamic eccentric displacement according to step five. The invention solves the problem of calculating the dynamic eccentric displacement of the rotor of the permanent magnet synchronous motor at present.

Description

technical field [0001] The invention relates to a method for calculating the dynamic eccentric displacement of a permanent magnet synchronous motor rotor, belonging to the technical field of permanent magnet synchronous motor detection. Background technique [0002] There are many production processes of permanent magnet synchronous motors. Among them, the stator and rotor assembly process relies on tooling to ensure the coaxiality of the stator and rotor, which inevitably causes the dynamic eccentricity of the rotor. At the same time, the symmetry and consistency of the stator and rotor also affect the degree of dynamic eccentricity of the rotor. For permanent magnet synchronous motors, due to the constraints of the manufacturing process level, the parameter dispersion and assembly dispersion brought about by the design, manufacturing and assembly process make it inevitable that there will be a certain degree of The difference, and this difference intensifies the degree of ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/17
Inventor 叶雪荣吴丽琴朱妍翟国富
Owner HARBIN INST OF TECH