Thyristor Speed Controller (9017)
The Thyristor Speed Controller contains a thyristor single-phase half-bridge rectifier installed in a full-height EMS module.
Speed control of the DC motor is achieved by varying the firing angle of the thyristors.
In the open-loop mode of control, the firing angle is set manually using a potentiometer. While in the closed-loop mode, it is set by a controller, which compares the motor armature voltage to a voltage reference set by the user.
The mode of control is selectable using a toggle switch.