Denso Corporation

Toyohashi University of Technology

Murata Machinery, Ltd.

Naoki Sakai

Takashi Ohira

Masayoshi Sugino

Satoshi Kitabayashi

Kazuhiro Ishikawa

Takanari Sasaya

Minoru Mizutani

Masafumi Hayakawa

Tetsuo Hirano

Motoaki Miyazaki

Hiroki Kuniyoshi

Makoto Teramoto

Takaaki Masaki

Shinji Abe

In a local cart traveling system, a frame track includes first and second metal rails each with an L-shaped cross section and facing each other. A local cart is within the frame track, and includes a first electricity receiving tire and a second electricity receiving tire to travel on horizontal travel surfaces of the rails. A voltage supplier supplies an AC voltage to the travel surfaces, so that the first metal rail and a first electricity receiving tire define a first capacitor and the second metal rail and the second electricity receiving tire define a second capacitor. The local cart includes a power receiver to receive AC power, and a travel motor that receives power after the AC power is rectified. The frame track includes a connecting plate as an electrical insulator covering portions of the surfaces of vertical walls of the first metal rail and the second metal rail.

Traveling body system

In each E-class inverter, an internal voltage detection circuit detects an internal voltage of a resonant type power supply circuit or a matching circuit and adjusts a phase of a driving signal of a MOSFET based on a detected voltage. It is thus possible to match a phase of a current voltage of a sine waveform of each inverter and combine power highly efficiently. Since power combining is performed highly efficiently without using a variable capacitor and variable inductor, it is possible to suppress upsizing of elements and achieve downsizing of a power amplifier circuit.

Power amplifier circuit including multiple inverters connected in parallel

A wireless power transmission apparatus includes a high-frequency power generator, a power-transmitting electrode, a plurality of power-receiving electrodes, a switchable matching device, a detection circuit and a controller. The high-frequency power generator generates high-frequency power. The power-transmitting electrode is configured to transmit the high-frequency power generated by the high-frequency power generator. Each of the power-receiving electrodes is capable of wirelessly receiving the high-frequency power from the power-transmitting electrode. The matching device is electrically connected with the power-transmitting electrode and includes one or more matching circuits. The detection circuit detects, based on the output of reflected power from the power-transmitting electrode, whether or not the generation of the high-frequency power by the high-frequency power generator and the transmission of the high-frequency power at the power-transmitting electrode match each other. The controller switches the one or more matching circuits of the matching device depending on the detection result of the detection circuit.

Wireless power transmission apparatus, conveyance system employing the apparatus and method of controlling the apparatus

A high frequency oscillator has a high frequency generation part, an oscillation part, a matching unit, rectification element parts and switch parts. The oscillation part oscillates high frequency power generated by the high frequency generation part. The matching unit is arranged between the high frequency generation part and the oscillation part, and has one or more capacitors and matching circuits having difference characteristics so as to perform matching between the high frequency generation part and the oscillation part. The rectification element parts and the matching circuits are arranged in one-to-one correspondence. The rectification element parts rectify high frequency power supplied from the high frequency generation part to the oscillation part. The switch part is connected to the corresponding rectification element part to switch the corresponding capacitor connected to the corresponding matching circuit through the corresponding rectification element part.

High frequency oscillator and wireless power supply device

An electronic device includes a printed circuit board, a housing in which the printed circuit board is accommodated, a cover covering an end opening of the housing, and a connector disposed on the printed circuit board which has an end exposed through an aperture of the cover outside the housing. The housing has an improved structure characterized by at least one protrusion formed on an inner face of a top wall of the housing, a bend in the top wall of the housing, and a table protruding outwardly from one wall of the housing on which a nameplate is attached. When the connector is rotated around a portion of the inner circumference of the cover defining the aperture, the at least one protrusion or the bend stops the rotation of the connector. The improved housing structure ensures a high rigidity of the housing and easy assembly of the electronic device.

Electronic device with protective housing having enhanced rigidity

Growing community of inventors

Toyohashi, Japan

Naoki Sakai