What is a DC motor and how does it work?

What is the main function of a DC motor?

A direct current (DC) motor is a type of electric machine that converts electrical energy into mechanical energy. DC motors take electrical power through direct current, and convert this energy into mechanical rotation.

How do you identify a DC motor?

Look for the commutator & brushes and salient field system to confirm. (iii) has 5 terminals, then it is a AC synchronous motor (3 for stator and 2 for field). Look for 2 slip rings for rotor dc supply. (iii) has 4 terminals, then it may be a DC motor, in which case look for the commutator & brushes to confirm.

What are the 4 parts of a DC motor?

The basic parts of a brushed DC motor are:

  • Case, bearing and stator magnets (stator, i.e. stationary),
  • Motor shaft and washers,
  • Armature / rotor,
  • Commutator (and sometimes a Varistor), and.
  • Brushes and terminals or leads.

What are the two main parts of a DC motor?

DC motors include two key components: a stator and an armature. The stator is the stationary part of a motor, while the armature rotates. In a DC motor, the stator provides a rotating magnetic field that drives the armature to rotate.

What are the disadvantages of DC motor?

Disadvantages of DC motors

  • High initial cost.
  • Increased operation and maintenance cost due to the presence of commutator and brush gear.
  • Cannot operate in explosive and hazard conditions due to sparking occur at brush (risk in commutation failure)
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What are the advantages of DC series motor?

Advantages of DC Series Motor

Dc series motor have good accelerating torque. Dc series motor have a relatively huge starting torques. Dc series motor delivers high torque during an overload. The dc series motor draws less current and power from the source compared to a shunt or compound motor.