Motor

 Electric drives

• An electric motor or drive is an electro-mechanical machine which converts the electrical energy into mechanical energy.
• The working principle of electric motor is mainly depends on the interaction of magnetic and electric field.

Typical Motors. 

 Types of electric motor

There are at least a dozen different types of electric motor, but there are two main classifications.

1. Alternating Current(AC) Motor
2. Direct Current(DC) Motor

Motor Classifications

AC Motor

• The alternating current is converted to mechanical energy by the AC motor.
• The AC motor takes alternating current as a input.
• AC power is required to run this motor.

DC Motor

• A machine that converts the DC electrical power into mechanical power is known as DC motor.
• Works on the principle that "when a current carrying conductor is placed in a magnetic field, it will experience a mechanical force" 
• The direction of this mechanical force is as per Fleming's left hand rule.
• The DC motor takes direct current as a input.

Synchronous Motor

• The machine changes the electrical power to mechanical power at a desired frequency is called synchronous motor.
• The speed of motor is synchronized with the supply frequency.

Linear Motor

• The motor which produces linear force instead of rotational force is known as linear motor.

Asynchronous or Induction Motor

• This motor uses electromagnetic induction phenomenon for the conversion of electrical power into mechanical power.
• It never runs at synchronous speed.