Which device allows an AC traction motor to operate from a DC source?

Which device allows an AC traction motor to operate from a DC source?

• A. Inverter
• B. AC traction motor
• C. DC traction motor
• D. Fish tape

Answer: (A)

An AC traction motor needs varying-frequency AC power to control speed and torque, but a DC supply provides a steady voltage. The device that converts this DC into adjustable three-phase AC is the inverter. By producing AC with controllable frequency and voltage, the inverter lets the motor run smoothly and at different speeds from a DC source. The other options don’t fit: a DC traction motor runs directly on DC, an AC traction motor won’t operate from DC without conversion, and fish tape isn’t related to vehicle traction power.

An AC traction motor needs varying-frequency AC power to control speed and torque, but a DC supply provides a steady voltage. The device that converts this DC into adjustable three-phase AC is the inverter. By producing AC with controllable frequency and voltage, the inverter lets the motor run smoothly and at different speeds from a DC source. The other options don’t fit: a DC traction motor runs directly on DC, an AC traction motor won’t operate from DC without conversion, and fish tape isn’t related to vehicle traction power.