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Motor temperature-raising experimental method and device

A technology of temperature rise test and power supply, applied in the direction of motor generator test, etc., can solve the problems of high cost and complex system, and achieve the effect of low maintenance cost, high efficiency and simple structure

Inactive Publication Date: 2006-08-16
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It requires two synchronous generator sets and excitation and other supporting equipment, the system is complex and expensive

Method used

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  • Motor temperature-raising experimental method and device
  • Motor temperature-raising experimental method and device
  • Motor temperature-raising experimental method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment one: if figure 1 shown.

[0014] A motor temperature rise test method, which connects an inverter in series between a power supply and a motor under test, and connects a pulse control input end of the inverter to a control pulse output end of a control unit;

[0015] Two sine wave signals with different frequencies are superimposed as a modulation wave and intersected with a triangular wave carrier to generate a PWM signal. The frequency and amplitude of the two sine wave signals can be adjusted independently;

[0016] Using the PWM signal as the pulse control signal of the inverter, the basic component of the inverter output voltage is also the superposition of two sinusoidal voltages with the same frequency as the control signal, and the two frequency components contained in the inverter output voltage The voltage can be adjusted, and the output voltage of the inverter is applied to the tested voltage to carry out the superimposed frequency motor temperat...

Embodiment 2

[0021] Embodiment two: if image 3 shown.

[0022] A motor temperature rise test method, which sequentially connects a transformer, a rectifier, an inverter and a filter in series between the power supply and the motor under test, and the pulse control input of the inverter is connected to the control pulse output of a control unit ;

[0023] Two sine wave signals with different frequencies are superimposed as a modulation wave and intersected with a triangular wave carrier to generate a PWM signal. The frequency and amplitude of the two sine wave signals can be adjusted independently;

[0024] Using the PWM signal as the pulse control signal of the inverter, the basic component of the inverter output voltage is also the superposition of two sinusoidal voltages with the same frequency as the control signal, and the two frequency components contained in the inverter output voltage The voltage can be adjusted, and the output voltage of the inverter is applied to the tested vol...

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Abstract

A temperature rising test method of motor includes series-setting transformer, rectifier, inverter and filter in sequence between power supply and motor to be tested; connecting pulse control input end of inverter to control pulse output end of control unit, superposing two sine wave signals with different frequency then crossing them with triangle carrier to form PWM signal being used as pulse control signal of inverter to make output voltage basic composition of inverter be superposition of two sine voltage with the same frequency of control signal and to make two frequency-composition voltage contained in output voltage of inverter be able to be adjusted .

Description

technical field [0001] The invention relates to a motor test method and equipment, in particular to a motor temperature rise test method and device. Background technique [0002] The traditional superimposed frequency method motor temperature rise test uses two sets of three-phase synchronous generator sets, the output voltage and frequency are U1, f1, U2, f2 respectively. It is required that both terminals of each phase stator winding of at least one of the synchronous generators are drawn out. The three-phase stator windings of two synchronous generators are respectively connected in series (such as figure 2 shown), and then supply power to the motor under test. It needs two synchronous generator sets and supporting equipment such as excitation, the system is complicated and the cost is expensive. Contents of the invention [0003] The object of the present invention is to provide a motor temperature rise test method and device, which can generate the voltage required...

Claims

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Application Information

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IPC IPC(8): G01R31/34
Inventor 刘连根何多昌李军刘可安尚敬曹国荣
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS