Abstract: A wireless power supply apparatus includes a power reception coil, an actual load and an auxiliary load. The power reception coil functions as a repeater for receiving electric power in a non-contact manner by magnetic resonance with a power transmission coil to which electric power is supplied from a power supply unit and relaying transfer of the electric power from the power transmission coil. The actual load is connected to the power reception coil and is powered by the electric power received by the power reception coil. The auxiliary load is inserted parallel to the power reception coil and the actual load and forms a closed circuit with the power reception coil when supply of the electric power to the actual load is interrupted to be in an open state.

Abstract: A direct drive type system such as a direct drive type robot is provided. This system includes a rail member, a movable member guided by the rail member and movable along the rail member, and an electric motor to drive the movable member. The system includes a transmission coil and a reception coil. The transmission coil has plural transmission coil segments which are planar coils and arranged on and along the rail member. High-frequency power is supplied to the transmission coil from a power source. The reception coil is arranged on the movable member to be opposed to the transmission coil and configured to an area faced with each of the transmission coil segments, wherein the area is smaller than that of each transmission coil segment. The reception coil receives power from the transmission coil without contact by a magnetic resonance. The received power is supplied to the motor.

Abstract: A wireless power supply apparatus includes a power reception coil, an actual load and an auxiliary load. The power reception coil functions as a repeater for receiving electric power in a non-contact manner by magnetic resonance with a power transmission coil to which electric power is supplied from a power supply unit and relaying transfer of the electric power from the power transmission coil. The actual load is connected to the power reception coil and is powered by the electric power received by the power reception coil. The auxiliary load is inserted parallel to the power reception coil and the actual load and forms a closed circuit with the power reception coil when supply of the electric power to the actual load is interrupted to be in an open state.

Abstract: A direct drive type system such as a direct drive type robot is provided. This system includes a rail member, a movable member guided by the rail member and movable along the rail member, and an electric motor to drive the movable member. The system includes a transmission coil and a reception coil. The transmission coil has plural transmission coil segments which are planar coils and arranged on and along the rail member. High-frequency power is supplied to the transmission coil from a power source. The reception coil is arranged on the movable member to be opposed to the transmission coil and configured to an area faced with each of the transmission coil segments, wherein the area is smaller than that of each transmission coil segment. The reception coil receives power from the transmission coil without contact by a magnetic resonance. The received power is supplied to the motor.