Patent application number | Description | Published |
20120230058 | NON-CONTACT POWER TRANSMISSION APPARATUS - A non-contact power transmission apparatus includes a high-frequency converting section, which converts input voltage to high-frequency voltage and outputs it, a primary coil, which receives high-frequency voltage from the high-frequency converting section, and a secondary coil, which receives electric power from the primary coil. The non-contact power transmission apparatus further includes a load to which the electric power received by the secondary coil is supplied, a rectifier located between the secondary coil and the load, and an output adjusting section, which supplies, as pulses, output voltage to the high-frequency converting section. The output adjusting section is configured to increase or reduce output to the load by adjusting a duty cycle of the pulse output. | 09-13-2012 |
20140320079 | NON-CONTACT POWER SUPPLY APPARATUS AND NON-CONTACT POWER SUPPLY SYSTEM - A non-contact power supply apparatus is configured to transmit power in a non-contact manner from a primary-side coil to a secondary-side coil by supplying alternating current power to the primary-side coil. The non-contact power supply apparatus is provided with an alternating current power output unit, a power transmitting unit, wiring, a detecting unit, and a determining unit. The alternating current power output unit is capable of outputting alternating current power. The power transmitting unit has the primary-side coil. The wiring electrically connects the alternating current power output unit and the power transmitting unit to each other. The detecting unit detects a ratio between an output voltage and an output current, which are outputted from the alternating current power output unit, or a phase difference between the output voltage and the output current. On the basis of the ratio and/or the phase difference detected by means of the detecting unit, the determining unit determines whether an abnormality has generated or not in the non-contact power supply apparatus. | 10-30-2014 |
20140333258 | CONTACTLESS POWER TRANSMISSION DEVICE - A contactless power transmission device is provided with an AC power source, a primary coil, a secondary coil, an electric component and a power factor calculation unit. The primary coil is supplied with AC power from the AC power source. The secondary coil is allowed to receive AC power from the primary coil. The electric component is supplied with the AC power that is received by the secondary coil. The power factor calculation unit calculates at least either the power factor with respect to the load from the output of the AC power source to the electric component, or the power factor with respect to the load from the output of the secondary coil to the electric component. | 11-13-2014 |
20150251545 | POWER RECEIVING DEVICE AND WIRELESS POWER TRANSFER APPARATUS - A power receiving device receives alternating current power in a wireless manner from a power supply device including a primary coil that receives the alternating current power. The power receiving device includes a secondary coil, a variable load, a first impedance conversion unit, a second impedance conversion unit, a fixed load, and a switch. The switch switches an output destination, to which the alternating current power received by the secondary coil is output from the first impedance conversion unit, to the fixed load or to the second impedance conversion unit and the variable load. | 09-10-2015 |
20150255991 | POWER RECEIVING DEVICE, POWER SUPPLY DEVICE, AND WIRELESS POWER TRANSFER APPARATUS - A power receiving device receives alternating current power in a wireless manner from a power supply device including an alternating current power supply and a primary coil. The power receiving device includes a secondary coil, a variable load, an impedance conversion unit, and an acknowledgement unit. Under a situation in which the acknowledgement unit acknowledges that the value of the alternating current power output from the alternating current power supply is unvaried, the impedance of the impedance conversion unit is variably controlled when an electrical property that is dependent on a relative position of the primary coil and the secondary coil varies. | 09-10-2015 |