Patent application number | Description | Published |
20110316553 | ABNORMALITY DETECTION SYSTEM - The abnormality detection system is provided for detecting an abnormality of an object. The abnormality detection system includes a high-frequency power source, a primary coil, a secondary coil and a controller. The high-frequency power source supplies power. The primary coil receives the power supplied from the high-frequency power source. The secondary coil is mounted to the object in noncontact with the primary coil for receiving power supplied from the primary coil. The controller is operable to detect the power received by the secondary coil and also to determine whether or not an abnormality is present in the object based on the detected power. | 12-29-2011 |
20120175968 | NON-CONTACT POWER TRANSMISSION APPARATUS AND POWER TRANSMISSION METHOD THEREOF - A primary coil, a primary resonance coil, a secondary resonance coil, a secondary coil, and a load form a resonant system. A frequency matching section is configured to match the resonant frequency of a resonant system and the output frequency of a high frequency power source with each other when the load fluctuates. An impedance matching section is configured to match the impedance from input terminals of the primary coil to the load at the resonant frequency and the impedance from the high frequency power source to the input terminals of the primary coil with each other. | 07-12-2012 |
20120306262 | SHIELD DEVICE FOR RESONANCE TYPE CONTACTLESS POWER TRANSMISSION SYSTEM - A shield device for a resonance type contactless power transmission system that reduces adverse influence on power transmission efficiency without unnecessarily increasing space for installing the shield device is provided. A shield device of the resonance type contactless power transmission system includes cylindrical shield members, which are provided in a power supply unit and a power receiving unit, respectively. The distance between the bottom of the shield member provided in the power supply unit and the primary-side resonance coil and the distance between the bottom of the shield member provided in the power receiving unit and the secondary-side resonance coil are both set to be greater than a distance between the primary-side resonance coil and the secondary-side resonance coil that allows power transmission at the maximum efficiency from the power supply unit to the power receiving unit. | 12-06-2012 |
20140175897 | RESONANCE-TYPE NON-CONTACT POWER SUPPLY SYSTEM - A resonance system that receives power from a power source section is configured by at least a primary resonance coil, a secondary resonance coil, and a load. The output frequency f | 06-26-2014 |
20140203658 | RESONANCE-TYPE NON-CONTACT POWER SUPPLY SYSTEM - A resonance-type non-contact power supply system is configured such that a power supply section is changeable in output frequency, and has an impedance measuring section that measures the input impedance of a resonant system. The power supply system includes a control section that performs control for transmitting proper power to power receiving equipment after changing the output frequency (f | 07-24-2014 |
20150028804 | CONTACTLESS POWER TRANSMISSION DEVICE - A contactless power transmission device includes a switching unit that switches a power transmission line so that a first power is transmitted through the first line when an AC power supply outputs a first AC power and so that a second power is transmitted through a second line when the AC power supply outputs a second AC power. An impedance conversion unit is arranged on the second line that converts an impedance from an output of the AC power supply to a variable load when the second power is transmitted through the second line to approach an impedance from the output of the AC power supply to the variable load when the first power is transmitted through the first line. | 01-29-2015 |
20150200547 | POWER-RECEIVING DEVICE AND POWER TRANSMISSION SYSTEM - A power-receiving device includes a secondary-side coil which can receive a first alternating current power without contact from a power-sending device having a primary side coil into which first alternating current power is input. The power-receiving device comprises a first power transmission path, a second power transmission path, a common path positioned in common with the first and second power transmission paths, and a voltage regulator arranged on the common path. The voltage regulator rectifies the first alternating current power received by the secondary coil or the second alternating current power from a connecting portion, converts the rectified power to a predetermined specific voltage value, and outputs the power. | 07-16-2015 |
20150229132 | POWER RECEIVING DEVICE AND WIRELESS POWER TRANSFER DEVICE - A power-receiving device includes a secondary coil, which wirelessly receives AC power from a power-supply device having a primary coil, a variable load, in which an impedance changes in accordance with the power value of the input power, a PFC circuit having a first switching element, and a DC/DC converter having a second switching element. The PFC circuit rectifies the AC power received by the secondary coil and improves the power factor by adjusting the duty cycle in switching operation of the first switching element in accordance with the impedance fluctuation of the variable load. The DC/DC converter is configured to convert the voltage of the DC power to a different voltage and output the converted voltage to the variable load, and to adjust the duty cycle in switching operation of the second switching element in accordance with the impedance fluctuation of the variable load. | 08-13-2015 |