What is the purpose of a VFD’s DC bus voltage control function?
A. To control the motor’s speed
B. To control the VFD’s output voltage
C. To control the VFD’s input voltage
D. To control the VFD’s efficiency
Answer:B
What is the purpose of a VFD’s DC bus voltage control function?
A. To control the motor’s speed B. To control the VFD’s output voltage C. To control the VFD’s input voltage D. To control the VFD’s efficiency
Explanation: A VFD’s DC bus voltage control function is used to control the voltage on the VFD’s DC bus, which is the internal power supply of the VFD. By controlling the DC bus voltage, the VFD can control its output voltage to the motor, which in turn controls the motor’s speed. This function is used to stabilize the VFD’s output voltage, which can be affected by changes in load, temperature, and other factors. By maintaining a stable output voltage, the VFD can provide accurate and consistent speed control for the motor.