Abstract: Disclosed is a rectifying circuit for high-frequency power supply that rectifies an alternating voltage at a high frequency exceeding 2 MHz, the rectifying circuit for high-frequency power supply including a voltage doubler rectifier circuit that rectifies the alternating voltage inputted from a reception antenna for power transmission 10, a partial resonance circuit that causes the voltage doubler rectifier circuit to perform partial resonant switching in a switching operation at the time of rectification, a matching functional circuit that has a function of matching a resonance condition to that of the reception antenna for power transmission 10, and a function of matching the resonance condition to that of the partial resonance circuit, and a smoothing functional circuit that smooths the voltage rectified by the voltage doubler rectifier circuit into a direct voltage.

Abstract: An automatic matching circuit includes a variable inductor disposed in order to perform impedance matching at a high frequency equal to or higher than 2 MHz between the output impedance of a high frequency power supply 10 and the input impedance of a resonant type transmission antenna 11, to cause an inductance value to be variable by using an electronic part that electrically performs contact switching including continuous contact switching, a variable capacitor disposed in order to perform the impedance matching, to cause a capacitance value to be variable by using an electronic part that electrically performs contact switching including continuous contact switching, and a variable control circuit 1 to control the electronic parts, in the variable inductor and the variable capacitor, each of which electrically performs the contact switching including the continuous contact switching, in such a way as to perform the impedance matching.

Abstract: A resonant type high frequency power supply device provided with a power semiconductor element that performs a switching operation at a high frequency exceeding 2 MHz, the resonant type high frequency power supply device including a variable inductor that makes an adjustment to the amplitude of a device output voltage.

Abstract: A rectifying circuit for high-frequency power supply that rectifies an alternating voltage at a high frequency exceeding 2 MHz, the rectifying circuit for high-frequency power supply including a bridge rectifier circuit that rectifies the alternating voltage inputted from a reception antenna for power transmission, a matching functional circuit that matches a resonance condition to that of the reception antenna for power transmission, and a smoothing functional circuit that smooths the voltage rectified by the bridge rectifier circuit into a direct voltage, in which the rectifying circuit for high-frequency power supply causes the bridge rectifier circuit to perform partial resonant switching in a switching operation at the time of rectification by using the matching functional circuit and the smoothing functional circuit.

Abstract: A resonant type high frequency power supply device provided with a power semiconductor element that performs a switching operation, the power supply device including a second power semiconductor element at least one or more connected in parallel to the power semiconductor element to achieve optimization of parasitic capacitances of the power semiconductor element and the second power semiconductor element itself, and a high frequency pulse drive circuit that transmits a pulse-shaped voltage signal having a high frequency exceeding 2 MHz to the power semiconductor element and the second power semiconductor element to drive the power semiconductor element and the second power semiconductor element.

Abstract: A resonant type high frequency power supply device provided with a power semiconductor element that performs a switching operation, the resonant type high frequency power supply device including a high frequency pulse drive circuit that transmits a pulse-shaped voltage signal having a high frequency exceeding 2 MHz to the power semiconductor element to drive the above-mentioned power semiconductor element, a variable pulse signal generating circuit that transmits a pulse-shaped voltage signal having a high frequency exceeding 2 MHz to the high frequency pulse drive circuit to drive the above-mentioned high frequency pulse drive circuit, and a bias power supply circuit that supplies driving power to both the variable pulse signal generating circuit and the high frequency pulse drive circuit.

Abstract: Disclosed is a rectifying circuit for high-frequency power supply that rectifies an alternating voltage at a high frequency equal to or higher than 2 MHz, the rectifying circuit for high-frequency power supply including a current doubler rectifier circuit that rectifies the alternating voltage inputted from a reception antenna for power transmission 10, a partial resonant circuit that causes the current doubler rectifier circuit to perform partial resonant switching in a switching operation at the time of rectification, a matching functional circuit that has a function of matching a resonance condition to that of the reception antenna for power transmission 10, and a function of matching the resonance condition to that of the partial resonant circuit, and a smoothing functional circuit that smooths the voltage rectified by the current doubler rectifier circuit into a direct voltage.

Abstract: A resonant type high frequency power supply device provided with a power semiconductor element that performs a switching operation at a high frequency exceeding 2 MHz, the resonant type high frequency power supply device including a resonance matched filter that controls both the waveform of a switching voltage of the power semiconductor element and the waveform of an output voltage.

Abstract: Disclosed is a resonant type high frequency power supply device provided with a power element that performs a switching operation, the power supply device including a high frequency pulse drive circuit 1 that transmits a pulse-shaped voltage signal having a high frequency exceeding 2 MHz to the power element to drive the power element, wherein a voltage signal from the high frequency pulse drive circuit 1 is subjected to partial resonance by an impedance of a signal line of the voltage signal and a parasitic capacitance of the power element.

Abstract: A system includes a primary transmission power supply 1 that provides single frequency power; a transmitter-receiver having plural channels of transmitting antennas 5 that wirelessly transmit power provided from the primary transmission power supply 1 and plural channels of receiving antennas 6 that receive the power transferred from the paired transmitting antennas 5; plural channels of transmission power circuits 2 that establish resonance conditions of the paired transmitting antennas; and plural channels of receiving power circuits 4 that establish resonance conditions of the paired receiving antennas, in which the individual transmission power circuits 2 provide the transmitting antennas 5 of adjacent channels with powers with half-wave resonance waveforms that avoid a period during which the power waves overlap on each other by shifting a phase of voltage or current of the powers.

Abstract: A system has primary transmission power supply 1 that supplies power; transmitter-receiver 3 including plural channels of transmitting antennas 5 that wirelessly transmit supplied power and plural channels of receiving antennas 6 that receive power from paired transmitting antennas 5; plural channels of transmission power circuits 2 that establish resonance conditions of paired transmitting antennas 5; and plural channels of receiving power circuits 4 that establish resonance conditions of paired receiving antennas 6. Transmitting antennas 5 have transmitting-side coils 8 approximately centered around the axis of a rotating body or arranged around the axis; and transmitting-side spacers 7 with prescribed permeabilities arranged to control magnetic flux caused by transmitting-side coils 8 for individual channels.

Abstract: A DC-DC converter 4 accumulates power generated by a power source in a power storage element, converts power from an input into a predetermined voltage to supply the predetermined voltage to a load connected to an output, and is activated to start power feeding when an input voltage exceeds Vd1. A power source control section 8 is connected to the output of the converter 4 to obtain power to operate, and controls the power supply to the load while changing an operation mode according to the power source energy. The section 8 is activated by the start of the power supply by the converter to operate in a low power-consumption mode with only the detected power source energy monitor, and starts the power supply to the load when the energy exceeds a level in which the input voltage becomes equal to Vd2 higher than Vd1.

Abstract: A system includes a primary transmission power supply 1 that provides single frequency power; a transmitter-receiver having plural channels of transmitting antennas 5 that wirelessly transmit power provided from the primary transmission power supply 1 and plural channels of receiving antennas 6 that receive the power transferred from the paired transmitting antennas 5; plural channels of transmission power circuits 2 that establish resonance conditions of the paired transmitting antennas; and plural channels of receiving power circuits 4 that establish resonance conditions of the paired receiving antennas, in which the individual transmission power circuits 2 provide the transmitting antennas 5 of adjacent channels with powers with half-wave resonance waveforms that avoid a period during which the power waves overlap on each other by shifting a phase of voltage or current of the powers.

Abstract: A system has primary transmission power supply 1 that supplies power; transmitter-receiver 3 including plural channels of transmitting antennas 5 that wirelessly transmit supplied power and plural channels of receiving antennas 6 that receive power from paired transmitting antennas 5; plural channels of transmission power circuits 2 that establish resonance conditions of paired transmitting antennas 5; and plural channels of receiving power circuits 4 that establish resonance conditions of paired receiving antennas 6. Transmitting antennas 5 have transmitting-side coils 8 approximately centered around the axis of a rotating body or arranged around the axis; and transmitting-side spacers 7 with prescribed permeabilities arranged to control magnetic flux caused by transmitting-side coils 8 for individual channels.

Abstract: A DC-DC converter 4 accumulates power generated by a power source in a power storage element, converts power from an input into a predetermined voltage to supply the predetermined voltage to a load connected to an output, and is activated to start power feeding when an input voltage exceeds Vd1. A power source control section 8 is connected to the output of the converter 4 to obtain power to operate, and controls the power supply to the load while changing an operation mode according to the power source energy. The section 8 is activated by the start of the power supply by the converter to operate in a low power-consumption mode with only the detected power source energy monitor, and starts the power supply to the load when the energy exceeds a level in which the input voltage becomes equal to Vd2 higher than Vd1.

Abstract: The vibration power generator includes: a plurality of permanent magnets (1, 2) integrated together to have given inter-magnet gaps under a state in which the same poles of the permanent magnets are opposed to each other; and a plurality of coils (3, 4) arranged on respective outer peripheries of the plurality of permanent magnets so as to have a distance from the plurality of permanent magnets, and is configured to generate an electric power through relative movement of the plurality of permanent magnets and the plurality of coils. A relationship between a length of the opposed coils and a length of the permanent magnet is set so that the length of the coils is larger than the length of the permanent magnet and equal to or smaller than a sum of the length of the permanent magnet and a length of the inter-magnet gap.

Abstract: The optical source device for a medical use or an industrial use can emit light of only an optical component of a required wavelength band without using xenon or filter and being harmful to not only an object itself such as an operated part but also an operator or observer and with a high efficiency and a high function. The device comprises a plurality of luminescent portions which each have a different luminescent wavelength band; wavelength restricting portions which each restrict each luminescent wavelength band of the luminescent portions; a mixing portion which mixes the outputs of the wavelength restricting portions; and a controlling portion which controls each luminescent output of the luminescent portions to emit light of only a necessary wavelength band.

Abstract: An electromagnetic converter includes a magnetic circuit having permanent magnets, a lower frame for fixing magnetic pole faces of these permanent magnets thereto, an upper frame having an opening formed therein on a side of the other magnetic pole faces of the permanent magnets and plates fixed to the other magnetic pole faces, and a diaphragm having a voice coil pattern arranged on side portions thereof in a direction of the length thereof and on a top portion thereof in a direction of the width thereof. Protruding portions join between these side portions. The periphery of the top portion is joined to the periphery of the opening of the upper frame via an upper gasket. A flange at the edges of the four side portions is joined to an inner surface of the upper frame, i.e., an inner portion of the magnetic circuit via a lower gasket.

Abstract: There is provided: first to fourth magnetic pole yokes 13-16 magnetized by the magnets 11, 12 having both poles on these opposite faces to establish a magnetic pole; and a vibrating membrane 17 disposed between the magnets 11, 12 and electromagnetically coupled to the yokes 13-16 by energizing a meandering coil pattern 17b thereon to vibrate in a predetermined direction. The yokes 13-16 include: abutting sections 13a-16a to be magnetized with abutting against the magnets 11, 12, and magnetic pole sections 13b-16b establishing the magnetic pole in a band shape. The sections 13b-16b each are disposed on the upper and lower sides of the vibrating membrane 17, and disposed with a gap (sound emitting hole 19) such that the magnetic poles different in magnetic polarity are positioned alternately in the lateral direction of the membrane 17 to form magnetic pole faces on the upper and lower sides thereof.