In wireless EV charging, the device outside the vehicle that transfers energy via contactless coupling is called the:

• A. Touchless power supply
• B. Charging station
• C. Primary pad
• D. Wireless transfer

Answer: (C)

In wireless EV charging, energy is transferred across a small air gap using inductive coupling between two pads. The device located outside the vehicle that sends power into the system is the primary pad. It sits on the ground and contains the transmitter coil and power electronics that create the magnetic field for charging. The vehicle side has a secondary pad with a receiver coil that picks up the energy.

This term is the most specific and appropriate because it identifies the external transmitting component. The broader label “charging station” refers to the whole system, including control electronics, power conversion, and safety features, not just the pad on the ground. “Touchless power supply” isn’t a standard term in this context, and “wireless transfer” describes the general process rather than a specific component. Hence, the primary pad is the correct designation.