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Electric Vehicle Propulsion - Coggle Diagram

- - - - Single Phase
        
        Asynchronous
        
        Synchronous
      - Three-Phase
        
        Asynchronous
        
        Squirrel Cage
        
        Wound Rotor
        
        Synchronous
        
        Permanent Magnet
        
        Reluctance
        
        Non-Salient Pole
        
        Salient Pole
    - - Series Wound
      - Seperately Excited Shunt Wound
      - Permanent Magnet / Brushless
      - Compounded
      - Shunt Wound
- - - - Very high torque at low speeds makes the DC motor attractive for traction and engine starting applications
      - Rotational speed can easily be controlled by varying the supply voltage
    - - Rotating part (rotor) called the armature (winding similar to wound rotor)
      - Stationary part (stator) introduces a magnetic field by either permanent magnets or field windings which act on the armature
    - - Commutator (a rotary electrical switch that periodically reverses the current between the rotor)
      - Shaft
      - Brush (Keeps in contact with commutator and allow for current to flow into the armature)
      - Stator (This can be permanent magnet or electromagnet)
      - Armature (Electromagnet coil)
  - - - Inner Rotor Motor
        Heat is easily dissipated from electromagnet coil winding as it is positioned outside. Designed to produce high torque.
      - Outer Rotor Motor
        Heat is from electromagnet coil winding is trapped within the permanent magnet. Designed to operate at lower rated current and low cogging torque.
    - - The coil for the 3 phase in the stator are winded and connected together in star connection.
      - Each commutation sequence:
        
        One windings energized to positive power (current enter)
        
        Second winding is negative (current exit)
        
        Third is in a non-energized condition
      - Torque is produced because of the interaction between the magnetic field generated by the stator coils and the permanent magnets. (ex: positive attract to negative)
      - In order to keep the motor running, the magnetic field produced by the windings should shift position, as the rotor moves to catch up with the stator field.