DC electric machine temperature rise testing method and apparatus

A technology of DC motor and temperature rise test, applied in the direction of motor generator test, etc., can solve the problems of complex system and so on

Inactive Publication Date: 2007-06-06
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional test method requires a paired motor, and the system is more complicated

Method used

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  • DC electric machine temperature rise testing method and apparatus
  • DC electric machine temperature rise testing method and apparatus
  • DC electric machine temperature rise testing method and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] As shown in Figure 4, it includes a DC filter capacitor 1, a filter 2, a rectifier 3, a PWM chopper 4, and a control unit 5, where the rectifier 3, PWM chopper 4, and filter 2 are connected in series in sequence at the AC power input terminal and the motor under test, the DC filter capacitor 1 is connected between the output terminals of the rectifier 3; the control unit 5 is composed of a sine wave generator 6, a triangular wave generator 7, a first Two superimposers 9 and PWM signal generator 10 constitute, two input ends of described sine wave generator 6 are connected with frequency input end and amplitude input end respectively, the output end of this sine wave generator 6 and DC average voltage give The fixed value input terminal is connected with the two input terminals of the first superimposer 8, the output terminal of the first superimposer 8 is connected with the modulation signal input terminal of the second superimposer 9, and the carrier input terminal of t...

Embodiment 2

[0020] As shown in Figure 5, the PWM chopper 4 includes two controllable power devices connected between the output terminals of the rectifier 3, these two power devices are connected in series in sequence, and their control terminals are respectively connected to the The control pulse output terminals of the PWM signal generator 10 of the control unit 5 are connected; the filter 2 is composed of a reactor and a capacitor, the capacitor is connected between the two input terminals of the tested DC motor, and the reactor is connected between the tested DC motor Between the positive terminal of the power supply and the connection midpoint of the two power devices. All the other parts are the same as the first embodiment.

Embodiment 3

[0022] As shown in Figure 6, the PWM chopper 4 includes two four controllable power devices connected between the output terminals of the rectifier 3, the four power devices are divided into two groups, and two power devices in each group respectively connected in series successively, and its control terminals are respectively connected to the control pulse output terminals of the PWM signal generator 10 of the control unit 5; the filter 2 is composed of a reactor and a capacitor, and the capacitor is connected to the two input terminals of the tested DC motor In between, the connection midpoints of the two power devices of each group are respectively connected to the positive terminal of the power supply of the DC motor under test through a reactor. All the other parts are the same as the first embodiment.

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Abstract

A test method and the device for the temperature rise of direct current electric engine connects the rectifier, the PWM chopper and the filter between the power input and the tested engine. The impulse controlled input of the chopper is connected with the controlled impulse output of a controlled unit. A sine signal generated by a controlled unit plus with the DC voltage given value to get a impulse signal which minus the signal of the triangle wave generator, the result is transferred to the PWM generator to generate a PWM signal as the controlling signal of the PWM chopper which the output voltage is an impulse voltage acted on the tested electric engine. The speed of the electric engine is changed by adjusted the breadth, the frequency of the sine wave and the DC given value. If the virtual value of the AC for the electric engine is same with the rating DC value, the temperature rise test can be done. The system is simple and the working strength has decreased, the efficiency is improved.

Description

technical field [0001] The invention relates to a DC motor test method and equipment, in particular to a DC motor temperature rise test method and device. Background technique [0002] The traditional DC motor temperature rise test is carried out with the direct load method at rated power or nameplate current, voltage and rated speed, and the method of adding load generally adopts the feedback method. The method is to connect the tested motor with another DC motor of the corresponding specification mechanically and electrically, one of which operates as a motor, while the other operates as a generator. The losses of the two motors are supplied by the line power supply or the booster (as shown in Figures 1 and 2), and the losses of the two motors can also be jointly supplied by the line power supply and the booster (as shown in Figure 3). [0003] Traditional test methods require matching motors, and the system is more complicated. Contents of the invention [0004] The o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34
Inventor 何多昌尚敬曹国荣李军张敏
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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