What are the causes of DC speed motor heating

hit count: Updated: 2019-08-28 14:07:08 [ close ] share:

    It is normal for DC speed motor to generate heat during use, but it has a certain control range. Some users find that the fever is not a problem, in fact, we can understand the cause of the fever from several aspects.

    It is normal for DC speed motor to generate heat at 70-90 ° C. As long as it is lower than 130 ° C, there is generally no problem. If it really feels overheating, set the current of the driver to about 70% of the rated current of the motor or reduce the motor speed. When there is no failure, it will also heat normally. Of course, the normal heating temperature will not be too high.

    Reasons for normal heating of DC speed-regulating motor:

    First, the coil has resistance, and the current flows through the loss power;

    Second, the magnetic field of the iron core has a "hysteresis loop", and a part of the magnetic energy converted from electrical energy continues to be converted into thermal energy;

    Third, the iron core also has eddy currents, and a part of the magnetic energy converted from electrical energy is turned into electric current and then into thermal energy;

    Fourth, there is friction between the rotating parts of the machine, and a part of the kinetic energy converted from electrical energy continues to be converted into thermal energy.

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