What is the purpose of a VFD’s dynamic braking function?
A. To slow down the motor quickly when it is running at high speeds
B. To increase the braking torque of the motor
C. To stop the motor quickly when it is running at high speeds
D. To reduce the heat generated by the motor during braking
Answer:C
What is the purpose of a VFD’s dynamic braking function?
A. To slow down the motor quickly when it is running at high speeds B. To increase the braking torque of the motor C. To stop the motor quickly when it is running at high speeds D. To reduce the heat generated by the motor during braking
Explanation: A VFD’s dynamic braking function uses the inverter section of the VFD to quickly stop the motor by applying a high frequency, high voltage signal to the motor terminals. This creates a strong electromagnetic field in the motor, which generates a braking torque that slows the motor down. This function is particularly useful when the motor needs to be stopped quickly, such as in emergency stop situations.