Wireless power transfer system and vehicle power supply device

A vehicle power supply device that supplies electric power to a vehicle, the vehicle incorporating a power supply secondary coil, the vehicle power supply device comprising:

• a main structure provided with a storage space arranged along a moving path;
• a power supply apparatus provided at a specific position that is at least one particular position on the moving path, the power supply apparatus having a power supply primary coil capable of performing wireless power transfer and a drive circuit that drives the power supply primary coil;
• a vehicle support structure that is a structure capable of supporting the vehicle;
• a moving carriage having a moving carriage main body and the power supply primary coil incorporated in the moving carriage main body, the moving carriage main body being capable of supporting the vehicle support structure that supports the vehicle and moving on the moving path;
• and
• a transfer apparatus capable of transferring the vehicle between the moving carriage main body and the storage space, wherein
• when the moving carriage stops at the specific position on the moving path,
• the power supply primary coil and the power supply secondary coil are arranged such that a first magnetic flux direction line that is a linear virtual line extending in accordance with a direction of a magnetic flux of a magnetic field generated in a central part of the power supply primary coil and a second magnetic flux direction line that is a linear virtual line extending in accordance with a direction of a magnetic flux of a magnetic field generated in a center of the power supply secondary coil substantially intersect, and the wireless power transfer is performed from the power supply primary coil to the power supply secondary coil incorporated in the vehicle supported by the vehicle support structure supported by the moving carriage.

A vehicle power supply device that supplies electric power to a vehicle, the vehicle power supply device comprising:

• a main structure provided with a storage space arranged along a moving path;
• a power supply apparatus provided at a specific position that is at least one particular position on the moving path, the power supply apparatus having a power supply primary coil capable of performing wireless power transfer and a drive circuit that drives the power supply primary coil;
• a vehicle support structure having a vehicle support structure main body and a power supply secondary coil, the vehicle support structure main body being capable of holding a wheel of the vehicle to support the vehicle, the power supply secondary coil being provided at the vehicle support structure main body and capable of receiving the wireless power transfer;
• a moving carriage having a moving carriage main body and the power supply primary coil incorporated in the moving carriage main body, the moving carriage main body being capable of supporting the vehicle support structure that supports the vehicle and moving on the moving path;
• and
• a transfer apparatus capable of transferring the vehicle between the moving carriage main body and the storage space, wherein
• when the moving carriage stops at the specific position on the moving path,
• the power supply primary coil and the power supply secondary coil are arranged such that a first magnetic flux direction line that is a linear virtual line extending in accordance with a direction of a magnetic flux of a magnetic field generated in a central part of the power supply primary coil and a second magnetic flux direction line that is a linear virtual line extending in accordance with a direction of a magnetic flux of a magnetic field generated in a center of the power supply secondary coil substantially intersect, the wireless power transfer is performed from the power supply primary coil to the power supply secondary coil of the vehicle support structure supported by the moving carriage, and electric power supplied by the wireless power transfer to the power supply secondary coil is supplied to the vehicle supported by the vehicle support structure.