Judgment method of the dynamic threshold value of motor protection at a dynamic load rate
Feng Zhou,
Yunli Guan,
Pengfei Wang
et al.
Abstract:To address the shortcomings of traditional motor thermal protection, which uses the motor’s temperature or temperature rise threshold operating at full load as the basis for the judgment method, a dynamic threshold judgment method based on a study of the motor’s temperature rise characteristics under a dynamic load rate is proposed. Taking a forced air-cooled, three-phase asynchronous motor with 11 kW power as the research object, a 2D/3D motor model under steady-state conditions is established. The loss distr… Show more
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