Abstract: The invention provides a non-contact power supply system which supplies power from a power feeding coil on a ground side to a power receiving coil on a vehicle side, and provides a coil position detecting method of detecting a position of a power receiving coil. An excitation voltage and an excitation frequency for the power feeding coil are changed depending on the position of the power receiving coil relative to the power feeding coil. Then, the position of the power receiving coil is detected based on a received voltage with the power receiving coil when the power feeding coil is excited.

Abstract: A parking assist system is used in a wireless power supply system which performs wireless power supply between a ground-side coil unit and a vehicle-side coil unit. The parking assist system determines a position of a vehicle relative to each of a first region in which the power supply is possible when a gap between the vehicle-side coil unit and the ground-side coil unit is maximum and a second region in which the power supply is possible when the gap is minimum. The parking assist system determines possibility of the power supply, based on a result of the determination on the vehicle position, and displays a result of the determination on the possibility of the power supply, for an occupant of the vehicle.

Abstract: The invention provides a non-contact power supply system which supplies power from a power feeding coil on a ground side to a power receiving coil on a vehicle side, and provides a coil position detecting method of detecting a position of a power receiving coil. An excitation voltage and an excitation frequency for the power feeding coil are changed depending on the position of the power receiving coil relative to the power feeding coil. Then, the position of the power receiving coil is detected based on a received voltage with the power receiving coil when the power feeding coil is excited.

Abstract: A coil unit for contactless power transmission includes a non-circular flat coil; a core member made of a magnetic material; and a thermal conductor that has a higher thermal conductivity than the core member. The coil has a corner section and a non-corner section in a coil axial direction view, and the core member and the thermal conductor are disposed to face the non-corner section and the corner section, respectively in a coil axial direction.

Abstract: A magnetic core 47 to be housed in a coil bobbin 57 is split along a coil-axis intersecting direction Y into a plurality of split magnetic cores 47a, the coil-axis intersecting direction Y intersecting a coil axis direction X, and a clearance C extending along the coil axis direction X is provided between the plurality of split magnetic cores 47a. In each clearance C, a protrusion 51a protruding upward from a core base 51 is inserted and arranged to ensure sufficient rigidity. Providing the clearances C reduces the entire weight of the magnetic core 47 and also ensures a large coil width in the coil-axis intersecting direction Y. By ensuring a large coil width, alignment between a power-transmission-side coil 11 and a power-reception-side coil 13 becomes easier.

Abstract: A wireless power supply system of the present invention performs wireless power supply between a power transmission coil installed at a parking space and a power reception coil mounted on a vehicle, transmits judging power for judging a parking position from the power transmission coil to the power reception coil in an operation of parking the vehicle in the parking space, and sets an excitation frequency of the judging power to a frequency lower than an in-phase resonance point or higher than an anti-phase resonance point.

Abstract: The parking assistance device is used in a wireless power supply system which performs wireless power supply between the power transmitting coil on a ground side and the power receiving coil on a vehicle side, and includes: three or more coils aligned in one direction in a plan view of the vehicle, the coils configured to detect magnetic flux in a height direction of the vehicle which is generated by the power transmitting coil; and a misalignment detection unit configured to detect misalignment between the power transmitting coil and the power receiving coil in the one direction, based on a decrease in the magnetic flux in the height direction of the vehicle which is detected by the three or more coils.

Abstract: A contactless electric power supply device 100 to charge a battery 28 of a vehicle includes a power transmitting circuit 101 having a power transmitting coil 12 and a charging circuit 201 having a power receiving coil 22. An electric power is transmitted from power transmitting coil 12 to power receiving coil 22 in a contactless manner. When the vehicle approaches power supply device 100, a trial power supply in which a electric power transmission through a minute electric power is carried out is executed and a power transmission efficiency from power transmitting coil 12 to power receiving coil 22 is estimated on a basis of a current flowing through power transmitting circuit 101. From this power transmission efficiency, a determination of whether power receiving coil 22 falls in a range in which battery 28 is chargeable with respect to power transmitting coil 12 is made.

Abstract: A coil unit for contactless power transmission includes a non-circular flat coil; a core member made of a magnetic material; and a thermal conductor that has a higher thermal conductivity than the core member. The coil has a corner section and a non-corner section in a coil axial direction view, and the core member and the thermal conductor are disposed to face the non-corner section and the corner section, respectively in a coil axial direction.

Abstract: A wireless power supply system of the present invention performs wireless power supply between a power transmission coil installed at a parking space and a power reception coil mounted on a vehicle, transmits judging power for judging a parking position from the power transmission coil to the power reception coil in an operation of parking the vehicle in the parking space, and sets an excitation frequency of the judging power to a frequency lower than an in-phase resonance point or higher than an anti-phase resonance point.

Abstract: A parking assist system is used in a wireless power supply system which performs wireless power supply between a ground-side coil unit and a vehicle-side coil unit. The parking assist system determines a position of a vehicle relative to each of a first region in which the power supply is possible when a gap between the vehicle-side coil unit and the ground-side coil unit is maximum and a second region in which the power supply is possible when the gap is minimum. The parking assist system determines possibility of the power supply, based on a result of the determination on the vehicle position, and displays a result of the determination on the possibility of the power supply, for an occupant of the vehicle.

Abstract: The parking assistance device is used in a wireless power supply system which performs wireless power supply between the power transmitting coil on a ground side and the power receiving coil on a vehicle side, and includes: three or more coils aligned in one direction in a plan view of the vehicle, the coils configured to detect magnetic flux in a height direction of the vehicle which is generated by the power transmitting coil; and a misalignment detection unit configured to detect misalignment between the power transmitting coil and the power receiving coil in the one direction, based on a decrease in the magnetic flux in the height direction of the vehicle which is detected by the three or more coils.

Abstract: A power reception-side coil is mounted on the bottom surface of a vehicle body and contactlessly receives power transmitted from a power feeding-side coil disposed on the ground. The power reception-side coil is of a solenoid type such that an electric wire is wound with the vehicle longitudinal direction as a coil axis. A shield member that is a plate-shaped magnetic shield is disposed between the bottom surface of the vehicle body and the power reception-side coil. The shield member has a forward-inclined surface serving as a first wall part protruding downward of the vehicle, the forward-inclined surface being raised and provided at the vehicle front side in a direction of the coil axis with respect to the power reception-side coil.

Abstract: In this vehicle mounting structure of a contactless power reception device, a power reception-side coil that configured to be mounted on a bottom surface of a vehicle body and that has an electrically conductive wire wound with the vehicle longitudinal direction as the coil axis is attached to the vehicle body by means of a fastening member made of a magnetic body. The fastening member is disposed to the outside of the power reception-side coil in a direction perpendicular to the coil axis.

Abstract: A magnetic core 47 to be housed in a coil bobbin 57 is split along a coil-axis intersecting direction Y into a plurality of split magnetic cores 47a, the coil-axis intersecting direction Y intersecting a coil axis direction X, and a clearance C extending along the coil axis direction X is provided between the plurality of split magnetic cores 47a. In each clearance C, a protrusion 51a protruding upward from a core base 51 is inserted and arranged to ensure sufficient rigidity. Providing the clearances C reduces the entire weight of the magnetic core 47 and also ensures a large coil width in the coil-axis intersecting direction Y. By ensuring a large coil width, alignment between a power-transmission-side coil 11 and a power-reception-side coil 13 becomes easier.

Abstract: This contactless electricity supply device, which contactlessly performs charging of the battery (28) of a vehicle, is provided with: an electricity transmission coil (12) disposed at a road surface; and an electricity reception coil (22) disposed in the vehicle. A foreign object detection coil (13) is provided to the upper surface of the electricity transmission coil (12), and on the basis of induced voltage arising at the foreign object detection coil (13) during a trial electricity supply, foreign objects between the electricity transmission coil (12) and the electricity reception coil (22) are detected.

Abstract: Provided is a contactless power supplying system which is efficient and can be built of small coils by appropriately limiting power to be inputted into a transmitting coil. In the contactless power supplying system, power transmitted from a transmitting coil is received by a receiving coil by means of magnetic coupling, and the contactless power supplying system includes a power control unit configured to cause power from a power source to flow through the transmitting coil and a control unit configured to perform power limiting control of limiting the power flowing through the transmitting coil by controlling the power control unit.

Abstract: In this vehicle mounting structure of a contactless power reception device, a power reception-side coil that configured to be mounted on a bottom surface of a vehicle body and that has an electrically conductive wire wound with the vehicle longitudinal direction as the coil axis is attached to the vehicle body by means of a fastening member made of a magnetic body. The fastening member is disposed to the outside of the power reception-side coil in a direction perpendicular to the coil axis.

Abstract: A power reception-side coil is mounted on the bottom surface of a vehicle body and contactlessly receives power transmitted from a power feeding-side coil disposed on the ground. The power reception-side coil is of a solenoid type such that an electric wire is wound with the vehicle longitudinal direction as a coil axis. A shield member that is a plate-shaped magnetic shield is disposed between the bottom surface of the vehicle body and the power reception-side coil. The shield member has a forward-inclined surface serving as a first wall part protruding downward of the vehicle, the forward-inclined surface being raised and provided at the vehicle front side in a direction of the coil axis with respect to the power reception-side coil.

Abstract: Provided is a contactless power supplying system which is efficient and can be built of small coils by appropriately limiting power to be inputted into a transmitting coil. In the contactless power supplying system, power transmitted from a transmitting coil is received by a receiving coil by means of magnetic coupling, and the contactless power supplying system includes a power control unit configured to cause power from a power source to flow through the transmitting coil and a control unit configured to perform power limiting control of limiting the power flowing through the transmitting coil by controlling the power control unit.