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2. AC motor - Wikipedia

   en.wikipedia.org/wiki/AC_motor

   a control-voltage (AC) winding in quadrature (i.e., 90 degrees phase shifted) with the main winding so as to produce a rotating magnetic field. Reversing phase makes the motor reverse. An AC servo amplifier, a linear power amplifier, feeds the control winding.

3. Commutator (electric) - Wikipedia

   en.wikipedia.org/wiki/Commutator_(electric)

   By reversing the current direction in the rotating ... These are single-phase AC-only motors with higher starting torque than could be obtained with split-phase ...

4. Universal motor - Wikipedia

   en.wikipedia.org/wiki/Universal_motor

   The universal motor is very similar to a DC series motor in construction, but is modified slightly to allow the motor to operate properly on AC power. This type of electric motor can operate well on AC because the current in both the field coils and the armature (and the resultant magnetic fields) will alternate (reverse polarity) synchronously ...

5. Rotary converter - Wikipedia

   en.wikipedia.org/wiki/Rotary_converter

   These included single phase AC systems, poly-phase AC systems, low voltage incandescent lighting, high voltage arc lighting, and existing DC motors in factories and street cars. [ 7 ] [ 8 ] Most machinery and appliances at that time were operated by DC power, which was provided at the user level by rotary converter substations for residential ...

6. Shaded-pole motor - Wikipedia

   en.wikipedia.org/wiki/Shaded-pole_motor

   A shaded-pole motor is a motor, in which the auxiliary winding is composed of a copper ring or bar surrounding a portion of each pole to produce a weakly rotating magnetic field. [2] When single phase AC supply is applied to the stator winding, due to shading provided to the poles, a rotating magnetic field is generated.

7. Repulsion motor - Wikipedia

   en.wikipedia.org/wiki/Repulsion_motor

   A repulsion motor is a type of electric motor which runs on alternating current (AC). It was formerly used as a traction motor for electric trains (e.g. SR Class CP and SR Class SL electric multiple units) but has been superseded by other types of motors. [citation needed] Repulsion motors are classified as single phase motors.