Other Motor Types
AC Synchronous Motor
A synchronous electric motor is an AC motor in which the rotation of the shaft is synchronized with and equal to the frequency of the line current. Small synchronous motors are used in applications where precise timing is important, such as clocks and timers.
Series Wound DC Motor
A series wound DC motor has its field winding connected in series with the armature winding. The motor torque produced is directly related to the current used. This motor has very high starting torque – this torque can be strong enough to lift heavy loads, but only over short periods of time. Applications include starter motors and industrial cranes. These motors have very poor speed regulation and can over speed at light loads.
AC Single Phase Induction Motor
A Single Phase Induction Motor is an AC motor that runs directly off of single phase line current. They are used in homes and offices since the supply power is generally single phase. They are cheap, have simple construction, and are relatively reliable. They are used in most home appliances.
Shunt Wound DC Motor
A shunt wound DC motor has its field winding connected in parallel with the armature winding. This motor has very good speed regulation, in other words, it can run at a constant speed independent of the variations on the load. It has low starting torque.
AC Three Phase Induction Motor
A Three Phase Induction Motor is an AC motor that runs on three phase AC line current. They are used mostly for industrial applications. They are cheap, have simple construction, and are relatively reliable. Where three phase power is available, these motors are more efficient than single phase motors.
Compound Wound DC Motor
A compound wound DC motor gets its name from the fact that characteristics of both the series wound and the shunt wound motors can be obtained from it. It performs in between the series and shunt wound motors for starting torque and speed regulation.