Global nonlinear inductance test method of switched reluctance motor

A technology of switched reluctance motor and test method, which is applied in the direction of motor generator test, measurement of resistance/reactance/impedance, measurement device, etc., can solve the problem of large inductance error of switched reluctance motor, and achieves simple measurement method and measurement accuracy high effect

Inactive Publication Date: 2009-09-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of using traditional LCR meters to measure the inductance of switched reluctance motors with large errors, and to provide a method for testing the global non-linear inductance of switched reluctance motors

Method used

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  • Global nonlinear inductance test method of switched reluctance motor
  • Global nonlinear inductance test method of switched reluctance motor
  • Global nonlinear inductance test method of switched reluctance motor

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specific Embodiment approach 1

[0022] Specific implementation mode one: the following combination Figure 1 to Figure 5 Describe this embodiment, the device used in the method of this embodiment includes a switched reluctance motor, a DC power supply 3, a switch 4, a current sensor 5, a computer 6, a stepper motor 7 and a stepper motor controller 8, and the phase of the switched reluctance motor The positive input terminal of the power supply of the winding 1 is connected to the positive terminal of the DC power supply 3, the negative terminal of the DC power supply 3 is connected to one end of the switch 4, and the other end of the switch 4 is connected to the negative input terminal of the power supply of the phase winding 1,

[0023] The current sensor 5 collects the current of the phase winding 1 and outputs it to the computer 6,

[0024] The output terminal of the stepper motor controller 8 is connected with the control terminal of the stepper motor 7, and the output shaft of the stepper motor 7 is fix...

specific Embodiment approach 2

[0056] Embodiment 2: The difference between this embodiment and Embodiment 1 is that it also includes a voltage sensor 9, which collects the voltage of the phase winding 1 and outputs it to the computer 6. Others are the same as Embodiment 1.

[0057] The voltage sensor 9 monitors whether the voltage value loaded on both ends of the phase winding 1 is normal.

specific Embodiment approach 3

[0058] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the step voltage U=1.2I described in step 3 e R, where I e R is the rated current of the phase winding 1, R is the equivalent resistance of the phase winding 1, and the others are the same as the first embodiment.

[0059] It is better to set the voltage value loaded on both ends of the phase winding 1 in this way, and the motor will not be burned.

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Abstract

A global nonlinear inductance test method of a switched reluctance motor belongs to the motor test field, aiming at solving the problem of big error of the inductance of the switched reluctance motors measured by traditional LCR meters. In the method, the position of a rotor of the switched reluctance motor is changed and fixed by a stepping motor; step voltage is loaded on a phase winding of the switched reluctance motor; a computer collects the current value of the phase winding via a current sensor; the collecting cycle is controlled by the computer programs; instantaneous inductance corresponding to the current values of different phase windings is computed when the position of the rotor is a certain fixed angle; the stepping motor is controlled to rotate according to the stepping angle; the relation between the current of the inductance is measured by above method under the condition of different positions of the rotor and finally the global nonlinear inductance information is obtained. The method is used for measuring the global nonlinear inductance of the switched reluctance motors.

Description

technical field [0001] The invention relates to a method for testing the global non-linear inductance of a switched reluctance motor, belonging to the field of motor testing. Background technique [0002] Due to the advantages of simple structure, convenient control, high reliability and low cost, switched reluctance motor has been valued and recognized by all walks of life. The switched reluctance motor is a kind of motor with high magnetic saturation, and its parameters are nonlinear. Especially the inductance parameters of the motor, the inductance of the motor is not only related to the rotor position of the motor, but also related to the winding current of the motor. The traditional LCR meter used to measure the inductance of the motor ignores the saturation characteristics of the motor and the non-linearity of the inductance, resulting in huge errors in the performance evaluation of the motor. Therefore, the measurement of the saturated inductance of the switched rel...

Claims

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Application Information

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IPC IPC(8): G01R31/34G01R27/26
Inventor 吴红星刘奉海寇宝泉嵇恒侯云鹏
Owner HARBIN INST OF TECH
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