Method for testing parameters of synchronous motor and device for achieving same

A technology for synchronous motor and parameter testing, which is applied in the direction of motor generator testing, measuring devices, and measuring electricity. It can solve problems such as strong dependence on drive performance, inability to measure and obtain various parameters at the same time, and complex torque coefficient testing methods. , to achieve the effects of improving measurement accuracy, convenient operation, and simple system structure

Active Publication Date: 2009-12-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of low test accuracy of AC-D axis inductance parameters, complex torque coefficient test methods, strong dependence on driver performance, and inability to simultaneously measu

Method used

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  • Method for testing parameters of synchronous motor and device for achieving same
  • Method for testing parameters of synchronous motor and device for achieving same
  • Method for testing parameters of synchronous motor and device for achieving same

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Experimental program
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specific Embodiment approach 1

[0011] Specific implementation manner 1: The process of the synchronous motor parameter testing method described in this implementation manner is:

[0012] Measure the AC and DC axis inductance L of the tested synchronous motor winding q , L d , The specific process is: to pass a single-phase AC current into any two phases of the three-phase windings of the synchronous motor under test i = 2 I sin ωt , Use external force to drive the rotor of the tested synchronous motor to rotate at a constant speed for more than one revolution. During the rotation of the tested synchronous motor, measure the voltage u at both ends of the energized winding, and decompose and calculate the effective value of the fundamental wave voltage of the measured voltage, and then take out all fundamental wave voltages Maximum value U among effective values max1 , Minimum U min1 , Then the quadrature axis and direct ...

specific Embodiment approach 2

[0021] Specific embodiment 2: The synchronous motor parameter test method described in this embodiment is based on the test method described in specific embodiment 1, adding the measurement of the DC resistance R of each phase winding of the synchronous motor under test. 0a The specific process is as follows: Direct current I is applied to any two-phase winding of the three-phase winding of the synchronous motor under test 0a , Collect and obtain the DC voltage U at both ends of the two-phase winding with DC current 0a , Then the DC resistance of the single-phase winding of the tested synchronous motor is: R 0 a = U 0 a 2 I 0 a .

[0022] The DC current I is applied to any two-phase windings...

specific Embodiment approach 3

[0023] Specific implementation mode 3: The synchronous motor parameter testing method described in this implementation mode is based on the testing method described in specific implementation mode 1, adding the back EMF coefficient K of the tested synchronous motor E The specific process is: use external force to drive the tested synchronous motor to rotate at a constant speed of n, and collect the effective value E of the fundamental wave of the electromotive force at both ends of any two-phase winding in the tested synchronous motor during the rotation of the tested synchronous motor. 0 , To obtain the back EMF coefficient of the tested synchronous motor K E = E 0 3 n .

[0024] For the electromotive force at both ends of any two-phase winding described in this embodiment, see Figure 4 As shown, it refers to...

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Abstract

The invention provides a method for testing parameters of a synchronous motor and a device for achieving the same, which relate to the field of motor tests. The method and the device solve the problems of low testing accuracy of quadrature and direct axis inductance parameters, complex method for testing moment coefficient, and strong dependency on driver performance in the prior method. The method comprises the following steps: energizing any two phases in three phases of windings of a tested synchronous motor with single-phase alternating current (square root 2I sin omega t), driving a rotor of the tested synchronous motor with an external force to rotate at a uniform speed for at least one revolution, testing voltage signals at two ends of the energized windings, and obtaining the quadrature axis and direct axis inductances of Lq and Ld respectively of the tested synchronous motor according to the voltage signals; and energizing any two phases of the three phases of the windings of the tested synchronous motor with direct current I1, driving the motor of the tested synchronous motor with the external force to rotate at a uniform speed for at least one revolution, and calculating the moment coefficient KT of the tested synchronous motor according to the tested maximum moment value Tmax1. The method and the device are applied to the field of testing the parameters of the synchronous motor.

Description

Technical field [0001] The invention relates to the technical field of motor testing, in particular to the testing technology of synchronous motor parameters. Background technique [0002] The accuracy of the parameters of the synchronous motor has a very important influence on the calculation accuracy of the motor characteristics and performance, the accuracy of the mathematical model, and the control performance of the motion control system. In the parameters of synchronous motors, winding resistance can usually be simply measured by LCR meter, bridge method, etc.; the back-EMF coefficient can be used to drive the measured motor to rotate by other motors, and the no-load electromotive force and motor speed at both ends of the winding can be measured. Then it is obtained by calculation; the measurement process of the torque coefficient is usually: use a driver to drive the measured motor, load the measured motor through a dynamometer, use a torque sensor to measure the output to...

Claims

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Application Information

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IPC IPC(8): G01R31/06G01R19/00G01R31/34G01L3/00
Inventor 寇宝泉刘奉海
Owner HARBIN INST OF TECH
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