How to determine the constant torque of a DC motor

The number of clicks: Updated: 2019-12-10 17:16:12 [ close ] share:


    Constant torque speed regulation is an indicator of DC motors , which usually means that the control system has current control, and the armature current is kept constant, and the speed is adjusted by changing the armature voltage. So, how to judge the constant torque of DC motor?

    When the magnetic field of the DC motor is constant, the armature current is constant, and the speed is adjusted by changing the armature voltage for constant torque speed control. At this time, the running state is constant torque operation. Above the base speed, when the field weakening speed is increased, the armature voltage is constant, and the speed is adjusted by changing the magnetic field excitation to adjust the speed for constant power. The operating state at this time is constant power operation. If it is not to keep the armature current constant, just turn it on when it is powered on, and stop it when it is powered off, and the torque and current will fluctuate with the load. If you use a DC motor, the magnetic field is constant. If your control system has current control, you can keep the armature current constant, and you can adjust the speed by changing the armature voltage. That is constant torque speed regulation.

    Then, if the DC motor does not keep the armature current constant, the power will stop and the torque and current fluctuate with the load.



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