February 10, 2017

How a Motor Works?

The general working mechanism is the same for all motors:

Figure: Basic Principle of how Electric Motors Work.
  • An electric current in a magnetic field will experience a force. 
  • If the current carrying wire is bent into a loop, then the two sides of the loop, which are at right angle to the magnetic field, will experience forces in opposite directions. 
  • The pair of forces creates a turning torque to rotate the coil. 
  • Practical motors have several loops on an armature to provide a more uniform torque and the magnetic field is produced by electromagnet arrangement called the field coils.


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