Hitachi, Ltd.

Renesas Electronics Corporation

Hitachi Astemo Ltd.

Aya Ohmae

Wen Zheng Li

Hiroki Funato

Masafumi Watanabe

Yusaku Katsube

Masahiro Toyama

Umberto Paoletti

Isao Houda

Kota Toida

Hiroshi Ikeda

Atsushi Nakamura

Takashi Suga

Fusanori Nishikimi

Ayumu Hatanaka

Keisuke Fukumasu

Isao Hoda

Yutaka Okubo

Paoletti Umberto

An object of the disclosure is to provide a technique for identifying an arc position between an overhead line and a pantograph mounted on an electric vehicle. A system according to the disclosure includes: a magnetic field detector configured to detects a magnetic field generated by an arc; and a first processor disposed in an electric vehicle and configured to determine a horizontal position of the arc on a pantograph by using the magnetic field detected by the detector.

Pantograph arc monitoring system and method

Provided is an immunity evaluation system that enables design feedback in consideration of a subject wiring and an improvement amount for improving an electromagnetic noise resistance of a circuit board. An immunity evaluation device includes: a storage unit configured to store characteristic data including probe-circuit board wiring coupling characteristics which are determined by a combination of a near-field probe and circuit board characteristics, and a test result; and an IC reaching signal level estimation unit configured to estimate a signal level reaching a terminal of an evaluation target IC. The immunity evaluation device receives board design information, information of the near-field probe, and test waveform instruction information of a signal applied to the near-field probe. The IC reaching signal level estimation unit reads the coupling characteristics from the storage unit based on the board design information of a test subject circuit board and the information of the near-field probe, and outputs a value of the IC reaching signal level reaching a terminal of the evaluation target IC from the board design information of the test subject circuit board, the information of the near-field probe, and the coupling characteristics.

Immunity evaluation system and immunity evaluation method

Since inductance due to wiring to a Y capacitor is large, it is necessary to arrange the Y capacitor near a bus bar, and there is no degree of freedom in arranging the Y capacitor. Directions of currents flowing through a positive electrode side wiringand a negative electrode side wiringin a multi-core cableare a directionfrom a bus bar positive electrode terminaltoward the Y capacitor positive electrode terminal, and a directionfrom a bus bar negative electrode terminaltoward the Y capacitor negative electrode terminal, respectively. On the other hand, a direction of a current flowing through a ground wiringis a directionfrom a Y capacitor ground terminaltoward a ground terminal. A magnetic flux generated by the currents flowing through the positive electrode side wiringand the negative electrode side wiringin the multi-core cableand a magnetic flux generated by the current flowing through the ground wiringin the multi-core cablecancel each other out, and the inductance can be kept small.

Filter device and power converter

A high voltage filter includes an anode bus bar, a cathode bus bar, a first capacitive element connected between the anode bus bar and a ground connector connected to a ground, a second capacitive element connected between the cathode bus bar and the ground connector, and a third capacitive element connected between the anode bus bar and the cathode bus bar. An anode terminal of the first capacitive element and a cathode terminal of the third capacitive element are arranged adjacent to each other, and a cathode terminal of the second capacitive element and an anode terminal of the third capacitive element are arranged adjacent to each other.

High voltage filter and power conversion device

Provided is an electromagnetic noise analyzing apparatus, a controlling apparatus, and a controlling method in each of which the continuous change of the running state of a vehicle or a railway vehicle is considered. The controlling apparatus includes: a vehicle running control section which outputs, on the basis of operation information of a vehicle, a vehicle driving parameter as a driving state of the vehicle; a signal converting section which converts the vehicle driving parameter into a noise parameter as an electric parameter; and an electromagnetic noise analyzing section which calculates, on the basis of the noise parameter, the amount of electromagnetic noise propagating in the vehicle.

Electromagnetic noise analyzing apparatus, controlling apparatus and controlling method

A clock control circuit includes a clock controller which disperses a harmonic of a clock signal in a used frequency band of a reception signal and controls an amplitude of a harmonic remaining in the used frequency band after the dispersion on a basis of a spread frequency used for the dispersion and a spread width of the harmonic.

Clock control circuit, demodulation device and spread spectrum method

It is an object to provide an electromagnetic wave measuring apparatus and an electromagnetic wave measuring method that suppress deterioration in sensitivity of electromagnetic noise in electromagnetic wave measurement. An electromagnetic wave measuring apparatus includes a sensor that detects an electromagnetic wave and outputs a detection signal having intensity corresponding to the magnitude of energy of the detected electromagnetic wave, a resistor connected to the sensor, a first variable capacitor connected to the sensor, a voltage detection circuit connected to the sensor, a second variable capacitor connected to a wire between the sensor and the voltage detection circuit, and a capacitance adjusting unit that adjusts capacitance values of the first variable capacitor and the second variable capacitor. The electromagnetic wave measuring apparatus adjusts, in the adjusting unit, the capacitance values of the first and second variable capacitors and performs electromagnetic wave measurement.

Electromagnetic wave measuring apparatus and electromagnetic wave measuring method

The purpose of the present invention is to provide a small electromagnetic wave detection apparatus. This electromagnetic wave detection apparatus has: a planar Luneburg lens, which is covered with metal plates facing each other, and which changes the output direction of electromagnetic waves corresponding to the input direction of the electromagnetic waves; and an electric field sensor electrically connected to the metal plates. The electric field sensor detects the electromagnetic waves outputted from the Luneburg lens, and outputs a detection signal having an intensity corresponding to the direction in which the electromagnetic waves have traveled thereto, and the level of the energy of the electromagnetic waves thus detected.

Electromagnetic wave detection apparatus

To provide a clock control circuit, a demodulation device, and a spread spectrum method, which can reduce interference caused by a clock signal on which spread spectrum is performed when demodulating a signal. A clock controlleraccording to the present invention disperses a harmonic of a clock signal in a used frequency band of a reception signal and controls a harmonic remaining in the used frequency band after the dispersion. For example, the clock controllercontrols an amplitude of the harmonic on the basis of a spread frequency used for the dispersion and a spread width of the harmonic.

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Tokyo, Japan

Aya Ohmae