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A method for online measurement of flux linkage characteristics of switched reluctance motor

A technology of switched reluctance motor and measurement method, applied in magnetic performance measurement, motor generator test, etc., can solve problems such as large test workload, not commonly used equipment, and SRM production impact.

Inactive Publication Date: 2017-03-29
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] In addition, the dividing head and clamping device required by this method are not commonly used equipment for general electrical engineering researchers.
If it is necessary to test the SRM installed at the work site, it needs to be removed from the work site and moved to a special test laboratory, which will affect the production of the original SRM work site, and the test workload will be heavy

Method used

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  • A method for online measurement of flux linkage characteristics of switched reluctance motor
  • A method for online measurement of flux linkage characteristics of switched reluctance motor
  • A method for online measurement of flux linkage characteristics of switched reluctance motor

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Embodiment Construction

[0037] The function of the flux linkage characteristic with respect to the phase current i and the rotor position angle θ can be expressed as ψ(i, θ). The relationship between the one-phase winding inductance L and the signal (θ, u, i) when the motor is running is as follows figure 1 Shown, where θ u Is the non-aligned position of the rotor, θ a Is the rotor alignment position, θ on Is the turn-on angle of the main switching device, θ * Is the rotor is between θ u And θ a Any position angle between. Corresponding to a specific current i * Position angle θ * The flux linkage at can be calculated by formula (1).

[0038]

[0039] Where t * Is the corresponding rotor position θ * Ψ is the flux linkage, r is the phase resistance, u is the phase voltage, i is the phase current, ψ(0,θ on ) Is when the current i=0, that is, at the opening angle θ on The flux linkage value at the position. It’s important to note that with θ on The current values ​​corresponding to the positions are all ...

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Abstract

The invention proposes a novel SRM (switched reluctance motor) flux linkage characteristic measurement method which does not need any dividing head or clamping device and only needs to connect a controller used for measurement to an SRD for control of operation for a period of time and thus the flux linage characteristics of the SRM can be obtained on site in an online automatic manner. Obtained result data is directly saved in the controller and can be directly used by a control program. The method is capable of carrying out measurement directly in an industrial site without moving the motor from a work site to a professional laboratory and realizing online measurement in the work site so that the work load is low and operation is convenient.

Description

Technical field [0001] The invention relates to the field of switched reluctance motors (SRM), in particular to the measurement of the flux linkage characteristics of the switched reluctance motors. Background technique [0002] The flux linkage characteristic of the Switched Reluctance Motor (SRM) is the main basis for realizing its optimal control. Due to the double salient pole structure and magnetic circuit saturation of SRM, its flux linkage characteristics are highly nonlinear, and it is generally impossible to obtain practical flux linkage characteristics through analytical calculations. [0003] At present, the methods to obtain the characteristics of SRM flux linkage mainly include finite element method (FEA), direct measurement method and indirect measurement method. [0004] (1) Finite element method: The flux linkage can be calculated through professional software and detailed switched reluctance motor design data. However, professional software is very expensive, and S...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/12G01R31/34
Inventor 陈海进李跃辉
Owner NANTONG UNIVERSITY