Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Engineering Company, Limited

Mitsubishi Electric Corporation

Kiyohide Sakai

Yoshiyuki Akuzawa

Toshihiro Ezoe

Yuki Ito

Shinichi Takagi

Hiroshi Aruga

Yoshihito Hirano

Yasuharu Koyata

Masao Imaki

Shigenori Shibue

Kouhei Teramoto

Akira Inoue

Shinsuke Shikama

Yoshinori Takahashi

Tomohiro Akiyama

Ryoji Hayashi

Mitsuhiro Shimozawa

Morishige Hieda

Tatsuo Hatta

Kazutomi Mori

Jiro Suzuki

Hiroyuki Joba

Takao Endou

Takeshi Fujita

Minoru Hashimoto

Takayuki Yanagisawa

Kimio Shigihara

Fusaoki Uchikawa

Sadayuki Matsumoto

Yasuaki Yoshida

Kenichi Tajima

Masakazu Takabayashi

Junichiro Hoshizaki

Hajime Takeya

Kiichi Yoshiara

Takeyuki Maegawa

Syuhei Yamamoto

Yuuhiko Hamada

Kansuke Tsuji

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 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

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.

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.

Resonant type high frequency power supply device

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, 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, 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.

An array antenna apparatus in which an SN ratio is improved. Antenna elements having transmission modules, respectively, are arranged in plurality, wherein the plurality of transmission modules respectively have transmission signal generators that each output a transmission intermediate frequency signal, local oscillation signal generators that each output a local oscillation signal, and transmission mixers that each mix the transmission intermediate frequency signal and the local oscillation signal with each other, thereby to carry out frequency conversion to a transmission high frequency signal. A reference signal source inputs a reference signal to the transmission signal generators and the local oscillation signal generators. The transmission intermediate frequency signal and the local oscillation signal are synchronized with each other by the reference signal.

Array antenna apparatus

A transmission module including a power supply voltage control unit that sets a power supply voltage to the high frequency amplifier in a variable manner, and a control circuit that controls an amplitude control unit, a phase control unit and the power supply voltage control unit. The control circuit and the power supply voltage control unit control the power supply voltage in accordance with an output power of the high frequency amplifier. The transmission module can carry out not only phase control but also amplitude control in a continuous manner, while suppressing amplitude and phase variation, and a high frequency amplifier in the transmission module is made highly efficient. In addition, a large directional gain, a low side lobe level and a low power consumption are achieved, as a phased array antenna apparatus using a transmission module.

Transmission module and phased array antenna apparatus

Provided is a device capable of oscillating a plurality of oscillation modes within a laser medium for obtaining a fundamental wave output which is easy in output scaling and high in luminance, thereby enabling a second harmonic conversion which is high in efficiency. The device includes: a laser medium () that is planar, has a waveguide structure in a thickness direction of a cross-section that is perpendicular to an optical axis (), and has a cyclic lens effect in a direction perpendicular to the optical axis () and the thickness direction; a clad () that is bonded onto one surface of the laser medium (); and heat sink () that is bonded onto one surface side of the laser medium () through the clad (), and in the device, a laser oscillation includes a laser oscillation that oscillates in a waveguide mode of the laser medium (), and a laser oscillation that oscillates in a plurality of resonator modes that are generated by a cyclic lens effect of the laser medium ().

Mode control waveguide laser device

Provided are a speckle removing light source capable of removing speckle by using laser light whose wavelength is temporally changed and a lighting apparatus for producing an image from which the speckle is removed. Included are a light source for outputting laser light, and a light frequency modulator for temporally changing a wavelength of the laser light. The light frequency modulator has a predetermined period set for changing the wavelength of the laser light. Also, provided is a lighting apparatus, including a spatial light modulator illuminated with the laser light outputted from the speckle removing light source to produce an image. The spatial light modulator has a period set for producing the image, which is longer than the period for changing the wavelength of the laser light by the light frequency modulator.

Growing community of inventors

Tokyo, Japan

Kiyohide Sakai