Advance VFD Quiz 1

What is Synchronous Speed?

• Synchronous speed is the speed of the rotor in a DC motor.
• Synchronous speed is the maximum speed of an AC motor under load.
• Synchronous speed is the speed at which electrical energy is converted to mechanical energy.
• Synchronous speed is the speed at which the motor's stator field rotates.

Which two factors determine an asynchronous motor's speed when it's operated directly on the line?

• Voltage and current rating
• Line frequency and number of poles

• Load torque and rotor resistance
• Temperature and humidity levels

What is the term for the difference between a motor's synchronous speed and its actual shaft speed?

• Torque
• Load
• Frequency
• Slip

Which motor type's shaft turns at about the same speed as its stator field rotates?

• Synchronous or Servo motor

• DC motor
• Stepper motor
• Induction motor

Which part of a VFD converts AC into DC?

• Inverter
• Controller
• Transformer
• Rectifier

Which VFD components switch DC on and off very quickly to create synthetic AC?

• Diodes
• Transformers
• Insulated Gate Bipolar Transistors (IGBTs)

• Capacitors

What is the technique called that VFDs use to produce synthetic AC?

• Pulse Width Modulation (PWM)
• Frequency Modulation (FM)
• Phase Shift Keying (PSK)
• Amplitude Modulation (AM)

List the three categories of motors that the MOVIDRIVE B can control.

• Brushless motors, DC motors, Servo motors

• Induction motors, Linear motors, DC motors

• Stepper motors, Servo motors, Linear motors

• Synchronous motors, Asynchronous motors, Linear

What is the MOVIDRIVE B's programming language called?

• Step 7

• Visual Basic

• C++

• IPOS

How much continuous overload can a MOVIDRIVE B handle?

• 75% of rated output
• 125% of rated output

• 200% of rated output
• 100% of rated output