Dc electric machine temperature test apparatus

Abstract

The invention relates to a dc motor direct-current motor experiment field, and specially discloses a direct current motor heat run test apparatus, which includes a pulse stream voltage generating unit and a direct current motor to be tested, wherein, the output end of the pulse stream voltage generating unit is connected to the excitation winding of the direct current motor to be tested, and the pulse stream voltage generating unit provides a pulse stream voltage overlapped by an adjustable direct voltage component and an adjustable sine alternating current voltage component. In the experiment process, the direct current motor heat run test apparatus provided by the invention does not require standard matched test accompanying motor, and can more quickly realize the heat run test of the direct current motor.

Description

Technical field [0001] The invention relates to the field of DC motor testing, in particular to a DC motor temperature rise test device. Background technique [0002] During the operation of the motor, in addition to external work, a part of the energy is consumed in the stator, rotor windings and other structures of the motor itself in the form of heat, causing the temperature of the motor to rise. The increase in motor temperature has a direct impact on the life of the motor. If the temperature of the motor exceeds the temperature rise range of the motor when it is running, the service life of the motor will be drastically reduced. Therefore, it is very important for those skilled in the art to realize the temperature rise test of the DC motor. [0003] The traditional DC motor temperature rise test is carried out with the direct load method under the rated power or nameplate current, voltage and rated speed, and the feedback method is usually used. [0004] See figure 1 Shown...

AI Technical Summary

Problems solved by technology

However, when conducting temperature rise tests on large motors produced in small batches, it is difficult to have a suitable motor as a companion motor, which makes it difficult to realize the temperature rise test of the motor

[0011] The patent application for invention with the application number 200610136844.4 filed by the applicant earlier discloses a DC motor temperature rise test device, which directly applies the generated pulse current voltage to the DC motor under test, although it can overcome the above two However, when using this DC motor temperature rise test device to perform temperature rise tests on DC motors, the dynamic response of the DC motor under test is relatively slow

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