Advanced VFD Quiz 2

What is the term for an object's tendency to resist changes in motion?

• Momentum
• Inertia
• Velocity
• Acceleration

What is the term for the aggressiveness that the control system uses to achieve or maintain the setpoint/target position?

• control feedback
• setpoint adjustment
• target modulation
• tightness/stiffness

Which vector control mode can operate the motor either open or closed loop?

• V/f

• VFC

• CFC

• PWM

Which vector control mode only works with SEW motors?

• V/f

• PWM

• VFC

• CFC

What kind of control system incorporates three factors that look at error from a past, present, and future perspective?

• Proportional-Integral-Derivative (PID)

• Feedback Control System
• Reactive Control System
• Static Control System

If you do not know a system's load inertia, what should you use for this value?

• 3

• Estimate based on personal experience.
• Use the maximum load capacity of the system.
• 10x the motor inertia

Which stiffness value, 0.5 or 2, is more likely to cause the motor to vibrate and the VFD halt with a fault code?

• 2
• 0.5

What causes the Movidrive's scope to start saving the data?

• A timer.

• It receives a trigger

• The green racetrack in Motion Studio

• The power supply is interrupted.

Which scope setting determines the length of the captured trace?

• Trace duration
• Number of channels

• Trace size
• Sample time

What can you do during the CFC startup process that you cannot do during the VFC startup process?

• You can change the system clock settings.
• You can run diagnostic tests on hardware.
• You can update the operating system software.
• You can measure the actual load inertia.