High power DC motor speed regulating circuit

This article introduces a 600 W DC motor speed regulation circuit. This motor is the take-up motor of a
reel machine. In order to take up the thread reeled out by the reel machine, the
take-up speed often needs to be adjusted. The method is to adjust the voltage with an autotransformer and then rectify it to control
the speed of the DC motor. size. However, autotransformers that are frequently adjusted are easily burned
out, and voltage regulators are often burned out due to broken carbon brushes or poor contact of the carbon brushes. To this end,
this article introduces a single-phase speed control circuit (Figure 2-49), which can replace the original speed control circuit
. After testing, this circuit is very practical. The entire circuit is installed in a box as big as a matchbox
, and the potentiometer is fixed on the control panel.