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Harmonic influence-considered linear motor iron loss calculation method and model

A linear motor, harmonic influence technology, applied in the direction of calculation, electric components, electromechanical devices, etc., can solve the problems of considering the actual structure of the linear motor, unable to consider the influence of harmonics, increasing calculation errors, etc., to improve convenience, The effect of improving motor efficiency and reducing iron consumption

Inactive Publication Date: 2018-09-28
SHANDONG UNIV
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Problems solved by technology

However, when the above two models are applicable to the case where the flux density waveform is a sine wave, the influence of harmonics on the iron loss of the linear motor cannot be considered, which significantly increases the calculation error
At the same time, the above two models do not take the actual structure of the linear motor into account, which will also bring some errors to the calculation

Method used

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  • Harmonic influence-considered linear motor iron loss calculation method and model
  • Harmonic influence-considered linear motor iron loss calculation method and model
  • Harmonic influence-considered linear motor iron loss calculation method and model

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example

[0049] Taking the cylindrical permanent magnet linear motor as an example, the stator material is DW470, the most common silicon steel sheet material in my country, and the laminated structure of silicon steel sheets is adopted. The loss coefficient is obtained by fitting the loss curve provided by the manufacturer k h The value is 124.376 5(WsT-2m-3), k a The value is 2.111 57(W(Ts-1)-3 / 2m-3), k f The value is 0.95. Combined with finite element software for modeling and calculation, and compared with the measured values ​​provided by the manufacturer.

[0050] Table 1 Iron loss of the stator of the cylindrical permanent magnet linear motor with no load.

[0051] Speed(m / s)

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Abstract

The invention discloses a harmonic influence-considered linear motor iron loss calculation method and model. According to the method, the condition of magnetic hysteresis loss increase caused by harmonic influences in a linear motor is considered; additional coefficients are imported in three iron loss models by combining practical conditions of a motor structure and a stator structure of the linear motor so as to obtain an iron loss calculation model; and iron loss of the linear motor is calculated by utilizing the iron loss calculation model. According to the method, the harmonic influencesand structures of motors are considered, so that better calculation precision is obtained.

Description

technical field [0001] The invention relates to the technical field of linear motor loss analysis and calculation, and relates to a method and model for calculating the iron loss of a linear motor considering the influence of harmonics. Background technique [0002] A linear motor is a motor that converts electrical energy directly into linear motion without any intermediate conversion mechanism. The linear motor has the characteristics of simple structure, high reliability, small mechanical loss and low cost. Therefore, it has been applied in many fields. Therefore, understanding its power consumption characteristics is of great significance for designing motors, optimizing structures, and improving efficiency. However, most of the current researches on iron loss are for rotating motors, and no accurate calculation model has been proposed for linear motors. Therefore, it is an urgent problem to study an accurate calculation model suitable for linear motor iron loss. [...

Claims

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Application Information

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IPC IPC(8): G06F17/50H02K41/02
CPCG06F30/23G06F2111/10H02K41/02
Inventor 仲慧彭博纬陈安康
Owner SHANDONG UNIV
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