A motor load device

Abstract

The invention provides a technical scheme of a motor loading device. The motor loading device provided by the technical proposal comprises a motor and a torque speed sensor. The motor loading device is characterized in that the motor drives a rotary table by virtue of the torque speed sensor, two sides of the rotary table are provided with magnet pole dishes, the polarities of the magnet pole dishs are different from each other, and the rotary table is connected with a resistance-variable box in series. The motor loading device provided by the scheme is used for warming the motor in a testing laboratory, and exerting loads to the motor in a loading test, and the motor loading device is especially applicable to small-scale motor testing rooms of enterprises; during a test process, by virtue of two methods of adjusting an exciting current and the resistance value of the rotary table, the loads can be conveniently exerted to the motor, the adjustment range is enlarged, and the adjustment precision and the stability are improved.

Description

technical field [0001] The invention relates to the field of motor product testing, in particular to a load device used for motor temperature rise and load tests. Background technique [0002] During the temperature rise and load test of the motor, it is necessary to select a device to apply a load to the motor, and this load is continuous, stable and adjustable. At present, there are many ways to apply load to the motor. One is to use magnetic powder hysteresis. Generally, this loading method is suitable for applications that require frequent start-stop and reversing, and the temperature rise load test of the motor takes a long time. , small power motors also need more than 3 hours; the speed is high, the general synchronous speed is 3000r / min or 1500r / min, which makes the more heat produced and accumulated, which directly causes the magnetic powder brake as a whole (each component and surface ) temperature rise; one is to drive the AC motor, which requires a complex feedb...

AI Technical Summary

Problems solved by technology

At present, there are many ways to apply load to the motor. One is to use magnetic powder hysteresis. Generally, this loading method is suitable for applications that require frequent start-stop and reversing, and the temperature rise load test of the motor takes a long time. , small power motors also need more than 3 hours; the speed is high, the general synchronous speed is 3000r / min or 1500r / min, which makes the more heat produced and accumulated, which directly causes the magnetic powder brake as a whole (each component and surface ) temperature rise; one is to drive the AC motor, which requires a complex feedback control system to change the frequency of the load motor, and the investment is relatively large, and it is difficult for general enterprise laboratories to have sufficient investment; one It is to drive a DC motor. This method requires an excitation unit, armature circuit resistance adjustment and energy feedback. The disadvantage of difficult loading under the circumstances is also difficult to overcome

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