DC Motors

• • Series Motor
  • Shunt Motor
  • Compound motor
  • Speed Control

  • Motor Starting

  
  

  What are the types of DC motors
• High starting torque Speed varies (decreases) with load 


  What are the characteristics of a series motor
• • Yoke (the external body of the motor)
  • poles (magnetic poles)
  • Stator (which has the field windings)
  • A rotor (which has the armature windings)
  • field windings


  What are the parts of a DC motor
• • The field and armature are connected in parallel
  • Low starting torque
  • Speed in constant with varying load
  • Advisable to start motor under no load


  What are the characteristics of a shunt motor
• The two types are 'short shunt motor' & 'long shunt motor'


  What are the types of compound motor
• What are the characteristics of a brush

  Its very soft

  • Its a conductor
  • Self lubricates
  • Resistance decreases with heat