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How To Change The DC Motor Speed
- Jan 07, 2019 -

There are three ways to control the speed of a DC motor:

(1) Adjust the armature voltage. Changing the armature voltage and changing the speed is a constant torque speed control method with fast dynamic response, which is suitable for systems requiring a wide range of stepless smooth speed regulation.

(2) Changing the main magnetic flux of the motor can only weaken the magnetic flux and make the motor shift upward from the rated speed. It is a constant power speed regulation method, and the dynamic response is slow. Although it can be steplessly smoothed, the speed regulation range is small.

(3) Change the armature circuit resistance R in the motor armature outside the string resistance to adjust the speed, only step speed regulation, poor smoothness, soft mechanical characteristics, low efficiency.