Hybrid Book - Chapter 6

8 Questions | Total Attempts: 42

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Hybrid Book Quizzes & Trivia

Questions and Answers
  • 1. 
    A PM electric machine contains all of the following except a ___.
    • A. 

      Rotor

    • B. 

      Stator

    • C. 

      Magnet

    • D. 

      Commutator

  • 2. 
    In a PM/BLDC machine, an increase in stator current causes a(n) ___.
    • A. 

      Increase in torque

    • B. 

      Decrease in torque

    • C. 

      Increase in rotor speed

    • D. 

      Decrease in rotor speed

  • 3. 
    A V-shaped magnet arrangement in the rotor decreases the ___.
    • A. 

      Maximum rotor speed

    • B. 

      Minimum rotor speed

    • C. 

      Rotor diameter

    • D. 

      Back EMF

  • 4. 
    A PM/BLDC operates with a(n) ___ stator to trigger timing control.
    • A. 

      Synchronous

    • B. 

      Asynchronous

    • C. 

      Six-step

    • D. 

      Axial

  • 5. 
    Field weakening of a PM electric machine is necessary to overcome the back EMF created by the ___.
    • A. 

      Stator magnetic field

    • B. 

      Stator speed

    • C. 

      Magnets

    • D. 

      Flux vector angle

  • 6. 
    One method to control the regenerative braking power generated by a PM electric machine is to ___.
    • A. 

      Control the lag angle

    • B. 

      Control the lead angle

    • C. 

      Increase the stator field speed

    • D. 

      Decrease the stator field speed

  • 7. 
    Another method to control the regenerative braking power generated by a PM electric machine is to ___.
    • A. 

      Increase the rotor speed

    • B. 

      Increase the field-weakening current

    • C. 

      Increase the lead vector

    • D. 

      Eliminate power-inverter signaling

  • 8. 
    The Toyota Prius PM electric machine controls ___ magnets poles on its rotor.
    • A. 

      4

    • B. 

      8

    • C. 

      16

    • D. 

      24

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