Temperature rise test method and system for electrically excited synchronous motors

Abstract

The application provides a temperature rise test method and system for electrically excited synchronous motors. The temperature rise test method comprises the following steps that: a first alternating current power supply supplies alternating current voltage to a stator side of the motor; a direct current power supply supplies direct current voltage; a controller generates an adjustable control signal; a current transformer processes the direct current voltage according to the control signal to obtain pulse excitation voltage and outputs the pulse excitation voltage to a rotor side of the motor; the control signal is adjusted to ensure that an effective value of alternating current flowing to the tested motor is equal to a rated current value of the motor, and then the motor can be subjected to a temperature rise test; and a temperature measurer calculates the temperature rise of the motor. The controller can adjust the output control signal according to the requirement on the type and the like of the tested synchronous motor, and the temperature rise test system can be used for performing the temperature rise test on the different types of electrically excited synchronous motors, and company test motors are not needed, so that the test working efficiency is high, and the cost is low.

Description

technical field [0001] The application belongs to the electrical field, and in particular relates to a temperature rise test method and system for an electrically excited synchronous motor. Background technique [0002] The temperature rise test of the motor is a test to determine the temperature rise of the motor stator winding, iron core and rotor winding under specified operating conditions. The purpose of the test is to check whether the temperature rise of each effective part of the motor meets the requirements of the standard. [0003] Currently, see figure 1 The system diagram of the test shown includes: the tested motor 001, the accompanying test motor 002, the temperature measurement unit 003, the line power supply 004 and the coupling 005. The power and working range of the accompanying test motor 002 are larger than that of the tested motor 001. The two motors are connected through the coupling 005 and kept in sync. The losses of the two motors are supplied by t...

AI Technical Summary

Problems solved by technology

[0004] However, if this method is used for the temperature rise test of an electrically excited synchronous motor, each time a temperature rise test is performed on an electrically excited synchronous motor, it is necessary to set up a companion motor whose power and working range are larger than the tested motor. When the temperature rise test of the electric excitation synchronous motor is carried out, it is necessary to set up corresponding accompanying test motors separately. There are many accompanying test motors to be prepared, and there is no special test device or system, which makes the temperature rise test of the electric excitation synchronous motor more flexible. low cost

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