Abstract: To minimize excessively high output or increases in magnetic-flux leakage by controlling power feeding on the power-feeding side if an unforeseen situation occurs. This power-feeding device (100) feeds power to an external power-receiving device (150) in a contactless manner. A power-feeding coil (103) uses electromagnetic power to feed electrical power to a power-receiving coil (154) in the power-receiving device (150). While power is being fed from said power-feeding coil (103), a power-feeding-side control unit (107) determines the amount of displacement of the power-feeding coil (103) and, on the basis of the determined displacement amount, controls the amount of electrical power being fed.

Abstract: A wireless power receiving device for receiving power wirelessly is configured to include a resonant circuit including a power receiving coil and a resonant capacitor for receiving power from a power feeding coil; and a phase adjustment circuit that is provided at a rear stage of the resonant circuit and adjusts a phase difference between a power feeding coil current and a power receiving coil current at a specific frequency to cancel horizontal magnetic flux.

Abstract: Power feed device (100) supplies power to storage battery (152) mounted on vehicle (150), through power receiving unit (154) of vehicle (150). Power supply unit (104) performs preliminary supply to power receiving unit (154) while sequentially changing a frequency, and performs main supply with power larger than in the preliminary supply. Power supply-side controller (103) acquires frequency characteristics associated with power supply coil (104a), and specifies a resonance frequency based on the acquired frequency characteristics. Power supply-side controller (103) determines whether or not to supply power to power reception coil (154a) based on a frequency difference between resonance frequencies.

Abstract: Disclosed is a contactless power supply device which supplies power in a contactless manner, and adopts a configuration including a power supply coil that generates an electromagnetic field and supplies power, a case that houses the power supply coil, a wire that dissolves at a temperature below a heat-resistant temperate of the case, a dissolution detection unit that detects dissolution of the wire, and a controller that performs control based on a detection result of the dissolution detection unit.

Abstract: Inverter supplies an alternating current (AC) power of a constant voltage or a constant current to power supply coil while varying a drive frequency. Frequency characteristic acquisition unit acquires frequency characteristics of a current value associated with a current flowing through power supply coil that receives the supplied AC power, or a voltage value associated with a voltage applied to power supply coil.

Abstract: Power supply device is provided with the following: a power supply unit (121) that includes a spiral coil or a solenoid coil; a frequency characteristic acquisition unit (211) that acquires the frequency characteristics of the efficiency of the supply of power from the power supply unit to the power receiving device; a peak determining unit (212) that determines peaks in the frequency characteristics of the efficiency of power supply; and a drive frequency determination unit (213) that, if two peaks have been found, determines as the drive frequency used for supplying power a frequency near the frequency that is the lower of the frequencies of the two peaks, with the lower frequency being given priority over a frequency near the higher frequency.

Abstract: The purpose of the invention is to facilitate mounting of a power receiving coil on a vehicle and also extend the allowable range of the positional shift of the power receiving coil with respect to a power supplying coil to prevent a power supply efficiency from lowering. A power supplying device (100) uses electromagnetic force to supply power to a vehicle (130) having a power receiving coil (153a) and has a power supplying coil (103a) facing the power receiving coil (153a) and supplying power thereto. The power supplying coil (103a) has substantially the same shape as the power receiving coil (153a) and has a first length longer than a second length, said first length being the length in the right and left direction of the vehicle (130), said second length being the length in the front and rear direction of the vehicle (130).

Abstract: The electricity supply device (100) supplies electricity using electromagnetic force and opposes an external electricity reception coil (153a). An electricity supply coil (102a) has a hollow section (102b), and has a spiral shape. A reader (103) has an antenna disposed in the projected space resulting from projecting the hollow section (102b) in the central axial direction of the electricity supply coil (102a) and at a position more separated from the electricity reception coil (153a) than the opposing surface that opposes the electricity reception coil (153a) and is of the electricity supply coil (102a), and ID data transmitted by an RF tag (154) installed proximally to the electricity reception coil (153a) is received and detected by the antenna. An electricity-supply-side control unit (104) determines the presence/absence of an electricity reception coil (153a) on the basis of the ID data detected by the reader (103).

Abstract: In the power supply apparatus (100), on an upper surface (202a), which is the surface opposing the power-receiving unit (153) of a cabinet (103b), in the portion where a power supply coil (103a) is projected when the power supply coil (103a) is projected on the cabinet (103b) toward the direction of the power-receiving unit (153), a first inclined part (203) gradually approaching the power supply coil (103a) from the top section (205) toward the inner edge section (211) of the power supply coil (103a) is formed in the radial direction of the power supply coil (103a), and in the portion where the power supply coil (103a) is projected, a second inclined part (204) gradually approaching the power supply coil (103a) from the top section (205) toward the outer periphery (212) of the power supply coil (103a) is formed in the radial direction of the power supply coil (103a).

Abstract: In the present invention, an electricity supply unit (103) contactlessly supplies electricity using electromagnetic induction to an electricity reception unit (153) provided to a vehicle. An electricity supply coil (103a) has a ring shape, and supplies electricity to the electricity reception unit (153) while facing the electricity reception unit (153). A casing (103b) houses the electricity supply coil (103a). The casing (103b) has an inclined section (202) that is inclined in a manner so as to approach the electricity supply coil (103a) gradually in the direction towards the outer periphery (212) of the electricity supply coil (103a) in the radial direction of the electricity supply coil (103a) at the portion at which the electricity supply coil (103a) is projected when the electricity supply coil (103a) is projected at the casing (103b) in the direction towards the electricity reception unit (153).

Abstract: A power supply apparatus capable of appropriately supplying electrical power to a power transmission coil even if a foreign object is heated during power supply. The power supply apparatus (100) is provided with a power supply coil (103a) opposing a power-receiving unit (153) provided to a vehicle and supplying power to the power-receiving unit (153), and a casing (103b) accommodating the power supply coil (103a). In the casing (103b), a first cover (202) is formed on a surface of the casing (103b) opposing the power-receiving unit (153), and a second cover (203) opposing the first cover (202) is arranged between the first cover (202) and the power supply coil (103a).

Abstract: An aluminum electrolytic capacitor has a capacitor element provided with an anode lead terminal and a cathode side lead terminal, a bottomed shield containing the capacitor element and a sealing rubber sealing an opening of the bottomed shield. The number of lead terminals of anode side and cathode side lead terminals, respective lead terminal being drawn out onto the same level of the bottomed shield, is selected from a number range of 2 to 4.

Abstract: An apparatus for automatically adjusting the playback position of the magnetic data recording device of the kind in which a rotating magnetic head is contacted with a stationary recording tape for recording the data on the tape and the tape is then advanced a predetermined length for recording the next data on the recording tape. The apparatus is designed to prevent the non-registration between the playback head position and the recorded zones of the tape and, to this end, a differential gearing is provided between the capstan shaft adapted for reeling out or unwinding of the tape and the driving shaft for said capstan shaft and operated to compensate for any non-registration between the playback head position and the recorded zones of the tape and automatically bringing the playback head at the edge of the recorded zone in the tape in good timing with the feed of the tape.