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Use of frequency transformer for motor temperature-raising experiment

A technology of temperature rise test and frequency converter, which is applied in the field of frequency converter, can solve the problems of complex system and high cost, and achieve the effect of simple system structure, low maintenance cost and low cost

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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  • Use of frequency transformer for motor temperature-raising experiment
  • Use of frequency transformer for motor temperature-raising experiment

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Embodiment Construction

[0008] It connects the inverter in series between the power supply and the motor under test. The basic composition of the output voltage of the frequency converter consists of the superposition of two sinusoidal voltages. The frequency converter superimposes two sine wave signals of different frequencies as a modulation wave intersecting with the triangular wave carrier to generate a PWM signal, and the frequency and amplitude of the two sine wave signals can be adjusted independently; the PWM signal is used as the inverter internal inverter The pulse control signal of the inverter, so that 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 voltage of the two frequency components contained in the inverter output voltage can be adjusted. A PWM signal is a pulse width modulated signal.

[0009] The voltage for the motor temperature rise test of the superimposed frequency ...

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Abstract

A frequency converter used in temperature rising test of motor is connected in series between power supply and motor to be tested .It features that two sine voltage superposition is contained in basic composition of frequency transformer output voltage.

Description

technical field [0001] The invention relates to the use of a frequency converter for a motor temperature rise test. 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 purpose of the present invention is to provide a frequency converter for motor temperature rise test. Compared with the traditional test method, it reduces two sets of...

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
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