AC Drivers (Inverter)


  • Explain the concepts of force, inertia, speed, and torque
  • Explain the difference between work and power
  • Convert horsepower to kilowatts
  • Describe the construction of a squirrel cage AC motor
  • Describe the operation of a rotating magnetic field
  • Calculate synchronous speed, slip, and rotor speed
  • Plot starting torque, pull-up torque, breakdown torque, and full-load torque on a NEMA B motor speed-torque curve
  • Describe the information displayed on a NEMA motor nameplate
  • Identify important motor derating factors
  • Describe the interrelationships for the following factors V/Hz, torque, flux, and working current
  • Describe the basic functions of the following AC drive circuits: converter, DC link, and inverter
  • Describe the operation of the following AC drive components: IGBT and free-wheeling diode
  • Explain how varying the pulse width and frequency of a PWM inverter affects motor speed
  • List several ways that an AC drive can stop its associated motor
  • Explain the difference between single-quadrant and four-quadrant operation
  • Explain the potential advantage of a regenerative AC drive design
  • Briefly describe each of the following AC drive control types: linear voltage/frequency, quadratic voltage/frequency, multi-point