|A Level Power Switching Capacitor Phase Diac >MOSFET< Phase Relay Thyristor Thyristor AC Transistor Triac|
Power Switching MOSFET
MOSFETS can be used for switching but Triacs and Thyristors are preferred in very high power switching situations.
All the circuits include back-emf diodes to allow the current in the motors to die away slowly, preventing large back emf potentials.
Commonly used for small to medium power situations.
Very common if the motor needs to be reversed or it's a stepper motor and the coil currents need to be reversed. Purpose designed chips are available to control this set-up.
The N and P Channel MOSFETS are connected as switches, not source followers.
Rarely chosen. The top circuit is usually better.