Method for measuring wound rotor type motor rated condition rated condition iron loss

Abstract

The invention discloses a method for measuring wound rotor type motor rated condition rated condition iron loss, and belongs to methods for measuring wound rotor type motor parameters. A prime motor is adopted to drag a wound rotor type motor rotor to rotate at the rated speed of a wound rotor type motor. A wound rotor type motor stator winding is conducted to an alternate current sinusoidal voltage source. A power sensor is adopted to measure the alternate current sinusoidal voltage source to obtain power output power. A current sensor is adopted to measure the wound rotor type motor stator winding to obtain a stator current effective value. The stator current effective value and the square of wound rotor type motor stator equivalent resistance are multiplied, and then the copper loss of a wound rotor type motor rated condition rated condition is obtained. The copper loss of the wound rotor type motor rated condition rated condition is subtracted from the output power of the alternate current sinusoidal voltage source, and then the iron loss of the wound rotor type motor rated condition rated condition is obtained. According to the method for measuring the wound rotor type motor rated condition rated condition iron loss, a complex iron loss computer model of the wound rotor type motor does not need to be set, and measuring is easy and accurate.

Description

Technical field [0001] The invention relates to a winding motor, in particular to a method for measuring the iron loss of the winding motor under rated operating conditions. Background technique [0002] Wound motor has a series of advantages such as simple structure, reliable operation, sturdy and durable, low price, convenient maintenance and so on. It is widely used in hoists, cranes, tower cranes and other places that require heavy starting and speed regulation. The iron loss of the wound motor includes hysteresis loss and eddy current loss. The measurement of the iron loss in the rated working condition is of great significance to the design, manufacture and energy-saving operation of the wound motor. At present, the known prior art uses motor parameters to estimate the iron loss of a wound-type motor under rated operating conditions through empirical formulas, which has the problem of being greatly affected by the motor parameters and poor accuracy. Therefore, how to quick...

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Problems solved by technology

At present, the known prior art is to use the motor parameters to estimate the iron loss under the rated working condition of the wound motor by using the motor parameters, which has the problems of being greatly affected by the motor parameters and having poor accuracy

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