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Multi-stage starting/engine starting torque calculation method

A technology of starting torque and calculation method, which is applied in the direction of control generator, synchronous generator control, electrical components, etc., can solve the problems of motor control influence, result is no longer accurate, motor torque calculation is inaccurate, etc., to achieve torque value accurate effect

Active Publication Date: 2019-06-14
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, due to the existence of the armature reaction, the reluctance distribution of the motor is completely different from that in the no-load state, which makes the expression of the inductance change, and the result obtained based on the traditional formula for calculating the inductance of the AC-D axis is no longer accurate, resulting in inaccurate calculation of the motor torque. Accurate, has a great influence on the control of the motor

Method used

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  • Multi-stage starting/engine starting torque calculation method
  • Multi-stage starting/engine starting torque calculation method
  • Multi-stage starting/engine starting torque calculation method

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.

[0014] like figure 1 As shown, the present invention provides a multi-stage starter / generator starting torque calculation method. First, the three-phase inductance parameters and excitation inductance of the motor are calculated by using the electromagnetic field finite element software; then, the self-inductance of any stator phase winding in the three-phase inductance (such as A-phase self-inductance LAA) is Fourier decomposed to obtain Its DC component amplitude L s0 , second harmonic component amplitude L s2 and phase angle α, and at the same time, perform Fourier decomposition on the exciting inductance M to obtain its fundamental component amplitude M af and phase angle β; then, use the following formula to calculate the torque of the motor:

[0015]

[0016] A...

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Abstract

The invention provides a multi-stage starting / engine starting torque calculation method. The multi-stage starting / engine starting torque calculation method comprises the steps of firstly, calculatingto obtain three-phase inductance and excitation inductance of a motor by electromagnetic field finite element software; secondly, performing Fourier decomposition on winding inductance and excitationinductance of an arbitrary phase of a stator; and finally, calculating to obtain torque by a new torque calculation formula. Since the new torque calculation formula fully considers the influence of an armature magnetic field on a stator magnetic field and an excitation magnetic field, and the torque result obtained by calculation is more accurate.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a multi-stage starter / generator starting torque calculation method. Background technique [0002] At present, most aircraft AC power systems in my country use multi-stage brushless synchronous motors as generators. The multi-stage brushless synchronous motors are mainly composed of main motors, rotating rectifiers, exciters and auxiliary exciters (permanent magnet machines). With the rapid development of large aircraft, the integration of starting and power generation is becoming more and more important in modern aviation technology. The goal of starting / generating technology is to be able to use multi-stage motors to drag the aeroengine smoothly, and the size of the starting torque is one of its core issues. [0003] There are two main methods of moment calculation, that is, the direct simulation calculation method of finite element software and the calculation metho...

Claims

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Application Information

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IPC IPC(8): H02P9/08H02P101/30H02P103/20
Inventor 庞基刘卫国魏志煌孙承浩孟涛
Owner NORTHWESTERN POLYTECHNICAL UNIV
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