Hybrid Book - Chapter 7

23 Questions | Total Attempts: 104

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Hybrid Book Quizzes & Trivia

Questions and Answers
  • 1. 
    The power inverter in a Honda Civic Hybrid can be found ___.
    • A. 

      Behind the left kick panel

    • B. 

      Behind the glove box

    • C. 

      Behind the rear seat

    • D. 

      In the engine compartment

  • 2. 
    The power inverter in a Toyota Prius can be found ___.
    • A. 

      Behind the left kick panel

    • B. 

      Behind the glove box

    • C. 

      Behind the rear seat

    • D. 

      In the engine compartment

  • 3. 
    One type of power transistor typically used in a power inverter is the ___.
    • A. 

      MOSFET

    • B. 

      FET

    • C. 

      MITFET

    • D. 

      IGFET

  • 4. 
    In a basic power inverter system, ___ transistors are used to drive a 3-phase electric machine.
    • A. 

      3

    • B. 

      6

    • C. 

      12

    • D. 

      24

  • 5. 
    There are ___ basic waveforms for electric machine control.
    • A. 

      2

    • B. 

      3

    • C. 

      4

    • D. 

      6

  • 6. 
    ___ is used to create an electric machine sine wave.
    • A. 

      PWM

    • B. 

      Triangle modulation

    • C. 

      Flux vectoring

    • D. 

      Unijunction angling

  • 7. 
    The sum of power concept is based on ___ difference between the rotor and stator.
    • A. 

      Voltage

    • B. 

      Current

    • C. 

      Triggering

    • D. 

      Control

  • 8. 
    The power inverter senses the ___ to control the amount of regenerative power generated during braking or vehicle coast.
    • A. 

      IGBT temperature

    • B. 

      Vehicle speed

    • C. 

      Battery-pack state of charge

    • D. 

      Electric machine field vector

  • 9. 
    Voltage boosting of the power inverter is used by ___.
    • A. 

      Toyota and Lexus

    • B. 

      GM and Honda

    • C. 

      Toyota and GM

    • D. 

      Ford and Lexus

  • 10. 
    One of the primary functions of the flyback diode in an IGBT package is to steer electrical current during ___ mode.
    • A. 

      Advanced torque

    • B. 

      Regenerative

    • C. 

      Reverse

    • D. 

      Machine start

  • 11. 
    One of the reasons that a power inverter control system uses different waveforms to power an electric machine is to ___.
    • A. 

      Decrease maximum speed

    • B. 

      Decrease slip angles

    • C. 

      Maintain bus voltage level

    • D. 

      None of the above

  • 12. 
    If the power inverter controller were to request only an increase in speed (or rpm), the ___ must increase.
    • A. 

      Waveform amplitude

    • B. 

      Number of rotor bars

    • C. 

      Number of magnets

    • D. 

      Stator frequency

  • 13. 
    ___ IGBTs are required to turn on two phases of a wye-connected stator.
    • A. 

      Two

    • B. 

      Three

    • C. 

      Six

    • D. 

      Eight

  • 14. 
    The boost converter is primarily used in the power inverter to ___.
    • A. 

      Increase horsepower and torque

    • B. 

      Decrease battery-pack size

    • C. 

      Reduce back EMF

    • D. 

      All of the above

  • 15. 
    The power inverter controller must ___ to the IGBT to increase the voltage level to the electric machine.
    • A. 

      Increase frequency

    • B. 

      Increase PWM

    • C. 

      Decrease frequency

    • D. 

      Decrease PWM

  • 16. 
    Increasing the voltage to the electric machine also increase the ___.
    • A. 

      Horsepower

    • B. 

      Torque

    • C. 

      Speed

    • D. 

      All of the above

  • 17. 
    A six-pack motor drive has ___ IGBTs.
    • A. 

      3

    • B. 

      6

    • C. 

      12

    • D. 

      36

  • 18. 
    An IGBT contains ___ transistor technologies.
    • A. 

      MOSFET and bipolar

    • B. 

      Bipolar and unijunction

    • C. 

      Bipolar and gate turn-off

    • D. 

      Thyristor and bipolar

  • 19. 
    The sum of power concept is very similar to the function of a(n) ___.
    • A. 

      Alternator and generator rotor

    • B. 

      Battery and cranking motor

    • C. 

      Charging system indicator bulb

    • D. 

      High-voltage vehicle light

  • 20. 
    To increase the electrical current to the electric machine stator coils, a power inverter must command sine wave amplitude to ___.
    • A. 

      Increase

    • B. 

      Decrease

    • C. 

      Remain unchanged

    • D. 

      Shut off for at least 3 seconds

  • 21. 
    The ___ control algorithm achieves torque control by controlling the phase electrical current in the stator coils and by controlling the slip frequency.
    • A. 

      Torque ripple

    • B. 

      Overmodulation

    • C. 

      Slip

    • D. 

      Reactive power

  • 22. 
    ___ is a technique used to increase the available voltage to a motor by using waveforms other than sine waves.
    • A. 

      Overmodulation

    • B. 

      Voltage boosting

    • C. 

      Boost converting

    • D. 

      Voltage bucking

  • 23. 
    Reactive power is generated during ___ mode when the magnetic fields of the rotor cut across the stator pole windings.
    • A. 

      Electric-assist propulsion

    • B. 

      Regenerative braking

    • C. 

      Capacitance charging

    • D. 

      Boost converter

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