Mitsubishi Electric Engineering Company, Limited

Mitsubishi Electric Corporation

Yoshiyuki Akuzawa

Yuki Ito

Kiyohide Sakai

Toshihiro Ezoe

Hiroshi Matsumori

Yoshiyuki Takahashi

Hirokazu Suzuki

Jun Bunya

Kansuke Tsuji

A conductor () wound into a multiple-layered helical shape, and an insulating member () provided between layers of the conductor are provided.

Resonance-type power transfer coil

A power reception device includes: a power reception coil that receives power by magnetic resonance; a power reception circuit that converts power received by the power reception coil into direct current; a load circuit that operates by the power into which the power is converted by the power reception circuit; a first substrate on which the power reception coil and the power reception circuit are mounted; and a second substrate on which the load circuit is mounted, the second substrate being located outside the power reception coil as viewed in an axial direction of the power reception coil.

Power reception device and contactless power transmission system

There are included: a switching parameter detecting unit () that detects a switching voltage of a switching element (Q); and an abnormality detecting unit (a first comparing unit () and an abnormality determining unit ()) that detects an abnormality caused by foreign matter, on the basis of a result of the detection by the switching parameter detecting unit ().

Power transmission-side apparatus

A movable portion transmission system includes a transmitter and receiver having a transmission antenna to perform wireless transmission of electric power supplied thereto and a reception antenna to receive the electric power from the transmission antenna, a transmission power supply circuit to establish a resonance condition of the transmission antenna, and a reception power supply circuit to establish a resonance condition of the reception antenna. The transmission antenna includes a transmission side coil in a spiral shape which is arranged while being centered at the axial center of a rotary member, and the reception antenna includes a reception side coil in a spiral shape which is arranged with a gap therefrom to the transmission side coil while being centered at the axial center of the rotary member.

Movable portion transmission system using wireless power transmission

A transmission/reception unit including a transmitting antenna and a receiving antenna for carrying out a wireless power transmission in cooperation with the transmitting antenna. Each of the transmitting antenna and the receiving antenna includes a coil which has a shape in which a portion through which a current flows in a direction extends along another portion through which a current flows in an opposite direction.

Power transmission device and antenna

Disclosed is a resonance type power transmission device in which a plurality of systems having respective transmitters and receiversare arranged opposite to each other and each of the systems transmits electric power having a single frequency, each of the transmitters and receivers having a transmission antennaand a reception antennawhich are disposed so as to be fitted to each other, and in which a magnetic sheetis disposed in a portion between the systems, opposite to the transmitters and receiversat a distance, from each of the transmitters and receivers, of 1/10 or more of the minimum of the outer diameters of the transmission antennaand the reception antenna

Resonance type power transmission device

A resonant coupling power transmission system includes a resonance type power transmission devicehaving a resonance type power supplyto supply power, and a resonance type transmission antennato transmit the power supplied by the resonance type power supply, and a resonance type power reception devicehaving a resonance type reception antennato receive the power transmitted by the resonance type transmission antenna, and a reception circuitto supply the power received by the resonance type reception antennato a load, and the characteristic impedance of each of the functional units is set in such a way that there is provided a correlation among the resonance characteristic value of the resonance type power supply, that of the resonance type transmission antenna, and that of the resonance type power reception device

Resonant coupling power transmission system, resonance type power transmission device, and resonance type power reception device

A configuration includes: resonance-type power source circuits provided for at least two electric paths, each including a power element that performs switching at a high frequency of 2 MHz or more, and a resonant circuit element that causes the power element to perform resonant switching; a phase-control-type matching circuits provided for the respective electric paths, each having a function of controlling a phase difference between output currents of the resonance-type power source circuits and a function of providing matching of resonance conditions between the resonance-type power source circuit and a load; and a combining unit that combines output currents processed by the phase-control-type matching circuits for the respective electric paths.

Resonance-type power transmitter

Disclosed is a resonant type transmission power supply device including a transmission power state detecting circuitto detect a transmission power state of a transmission antenna, a foreign object detecting circuitto detect the presence or absence of a foreign object in an electromagnetic field generated from the transmission antennaon the basis of a detection result acquired by the transmission power state detecting circuit, and a power control circuitto reduce or stop the supply of electric power to the transmission antennawhen foreign object is detected by the foreign object detecting circuit

Resonant type transmission power supply device and resonant type transmission power supply system

A transmitting device includes a transmission power supply to output electric power, whose frequency matches a resonance frequency of each of the transmitting antennas, based on input power, plural switches respectively provided for the transmitting antennas, the switches being switchable to connect or disconnect supply lines for supplying the electric power outputted by the transmission power supply to the transmitting antennas, a parameter detector to detect parameters regarding the transmission power supply, the parameter being changed as a receiving antenna gets close to the transmitting antennas, by using a protective function of the transmission power supply, and a switch controller to estimate the position of the receiving antenna from the result of the detection, and to perform switching control on the switches in accordance with the position of the receiving antenna.

Resonance type power transmission system, transmitting device, and power supply position control system

Disclosed is a resonant type power transmission antenna device provided with a plurality of transmission antennasand a plurality of reception antennas, the resonant type power transmission antenna device including a transmission shield antennaarranged between the plurality of transmission antennas, a reception shield antennaarranged between the plurality of reception antennas, transmission and reception circuitsandto operate the transmission and reception shield antennasandin electromagnetic field resonance having a phase opposite to that of the transmission and reception antennasandrespectively adjacent to the transmission and reception shield antennas.

Resonant type power transmission antenna device

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.

Rectifying circuit for high-frequency power supply

A second resonant type transmission power supply deviceincludes a transmission power state detecting circuitthat detects a transmission power state of a second transmission antenna, a foreign object detecting circuitthat detects the presence or absence of a foreign object in an overlapping range of electromagnetic fields on the basis of a detection result acquired by the transmission power state detecting circuit, and a power control circuitthat, when a foreign object is detected by the foreign object detecting circuit, controls a first resonant type transmission power supply devicein such a way as to reduce or stop the supply of electric power to a first transmission antenna

Resonant type power transmission system and resonance type power transmission device

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.

Resonant type high frequency power supply device and switching circuit for resonant type high frequency power supply device

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 circuitthat 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 circuitis subjected to partial resonance by an impedance of a signal line of the voltage signal and a parasitic capacitance of the power element.

Growing community of inventors

Chiyoda-ku, Japan

Yoshiyuki Akuzawa