Which section of solid-state DC drives supplies the DC voltage to the motor?

• A. Power section
• B. Control section
• C. Feedback section
• D. Input section

Answer: (A)

When you think about delivering the motor’s power, the responsibility lies with the power section. This part houses the power electronics—devices such as thyristors or transistors and the related circuitry—that actually convert and regulate the voltage and current that go to the motor. It includes the rectified DC path, any DC-link capacitors, and the switching stage (like a chopper or PWM inverter) that shapes the voltage applied to the motor.

The control section’s job is to process commands and generate the firing or modulation signals that drive those power devices. It doesn’t supply the motor power itself, but it determines what voltage/current the power section should produce to meet speed or torque requests. The feedback section provides measurements (speed, current, etc.) back to the controller so the drive can adjust its output in a closed loop. The input section handles the incoming supply, rectification, and protection before the power section takes over.

So the section that supplies the DC voltage to the motor is the power section.