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A method for calculating the amount of permanent magnets of a permanent magnet motor

A technology of permanent magnet consumption and permanent magnet motor, which is applied in the field of permanent magnet consumption calculation of permanent magnet motor, and can solve problems such as waste of resources and cost.

Active Publication Date: 2020-07-07
山西北方机械控股有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, in order to solve the waste of resources and the high cost of permanent magnet synchronous motors due to excessive permanent magnet consumption, and propose a method for calculating the permanent magnet consumption of permanent magnet synchronous motors

Method used

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  • A method for calculating the amount of permanent magnets of a permanent magnet motor
  • A method for calculating the amount of permanent magnets of a permanent magnet motor
  • A method for calculating the amount of permanent magnets of a permanent magnet motor

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Embodiment 1

[0052] A method for determining the air gap of a permanent magnet motor, taking a TYCKK400-4 (6kV 400kW) motor as an example, the specific steps include:

[0053] 1. According to the basic theory of electromechanics and the motor design manual, the back EMF is determined to be 6400V, the maximum air gap and the minimum air gap are 9mm and 6mm respectively, the length of the stator core is 462.5mm, and the length of the rotor core is 462.5mm. The magnetic permeability of the rotor is 6600 and 1600, the inner and outer diameters of the stator are 670mm and 423mm respectively, and the shaft diameter of the rotor is 150mm, which makes it effective and feasible in the design direction of ordinary asynchronous motors.

[0054] 2. According to the formula (1), it is determined that the outer diameter of the rotor is 408mm; the average air gap length parameter is used here, and those skilled in the art can assign values ​​according to the actual situation; for the permanent magnet moto...

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Abstract

The invention relates to a method for calculating the permanent magnet usage number of a permanent magnet motor, and belongs to the technical field of three-phase alternating current permanent magnetsynchronous motors. The method includes: firstly determining basic parameters of a permanent magnet motor according to the motor theory and the motor design manual so as to ensure that the parametersare effective and feasible in designing of a common asynchronous motor; determining the outer diameter D2 of a rotor according to the determined inner diameter of a stator and the size of an air gap;determining the magnetic flux area that the permanent magnets can be arranged in the rotor according to the rotor outer diameter, the shaft diameter and the number of motor poles; ignoring the core magnetic resistance and the leakage flux according to the electric motor magnetomotive force balance law, and calculating and obtaining the theoretical optimal usage number of the permanent magnets; andconsidering a harmonic magnetic leakage coefficient, an iron core magnetic resistance coefficient, an air gap magnetic leakage factor and an iron core magnetic leakage coefficient and then calculating the actual usage number of the permanent magnets according to the theoretical optimal usage number of the permanent magnets. Compared with the prior art, the method can reasonably determine the usage number of the permanent magnets, can improve the utilization rate of the permanent magnets, and can reduce the cost of the electronic motor on the basis of satisfying the electromagnetic performance.

Description

technical field [0001] The invention relates to a method for calculating the permanent magnet consumption of a permanent magnet motor, belonging to the technical field of three-phase AC permanent magnet synchronous motors. Background technique [0002] At present, the consensus in the motor industry is that the three-phase AC permanent magnet synchronous motor has the characteristics of high efficiency and flat efficiency curve, high power factor and high efficiency, and is superior to the three-phase asynchronous motor. The amount of permanent magnets used as the main assessment cost of permanent magnet motors affects the design cycle and market promotion of permanent magnet motors. The existing formula for calculating the amount of permanent magnets mainly considers the optimal amount of permanent magnets used in the state of maximizing the magnetic energy product of the permanent magnets. However, in actual design, the working point of the permanent magnets is not in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K15/03H02K1/00
CPCH02K1/00H02K15/03H02K2213/03
Inventor 武文虎冯雪山冯泽民刘志宏刘琳贾钰
Owner 山西北方机械控股有限公司
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