- Miami, Florida, United States
- US $119.99
- Jun 9th
With DC motors, the speed is controlled simply by varying the amount of voltage applied to the armature. The more voltage, the higher the speed. By adding an inexpensive packaged control, the user can vary the output voltage -- and thereby the speed of the motor-- simply by turning a knob on the control unit.Such SCR controls get their name from the silicon controlled rectifiers (SCRs) they use to convert the AC current supplied by the power company to DC.