Omron Automotive Electronics Co., Ltd.

Omron Corporation

Yasumichi Omoto

Koji Hachiya

Yusaku Ido

Masayuki Hanatani

Hajime Tamanaha

Shunji Ota

Takeshi Shoji

Hiroyoshi Koitabashi

Masanori Ando

Charge efficiency of normal charge is improved without restricting an operation of a low-voltage load of an electric vehicle during the normal charge. During a charge of a high-voltage battery of a vehicle, when a determination of the normal charge is made, and when a determination that a mode switching target load is not operated is made, power saving mode transition processing is performed. Therefore, an operating mode of a DC-DC converter, which steps down a voltage at the high-voltage battery and supplies the stepped-down voltage to a low-voltage battery and a low-voltage load, is set to a power saving mode in which consumption power is reduced compared with a normal mode. When a determination that a start-up manipulation of the mode switching target load is performed is made, the operating mode of the DC-DC converter is changed to the normal mode.

Power conversion apparatus and power control method

A power supply device includes: a power factor correction circuit which includes a capacitor and which corrects a power factor of power; a DC-DC converter which includes a switching element and which steps up or down an output voltage of the power factor correction circuit; a control unit; and a voltage detection unit which detects a voltage of an input side of the power factor correction circuit. The control unit controls the switching element such that an output voltage of the DC-DC converter is gradually reduced when stopping an operation of the DC-DC converter in a normal state in which the voltage detection unit does not detect a voltage lower than a predetermined value. When the voltage detection unit detects a voltage lower than the predetermined value, the control unit immediately turns off the switching element to stop the operation of the DC-DC converter.

Power supply device

A voltage drop of an output voltage of a DC-DC converter, caused by a wiring resistance, can properly be compensated at low cost. The DC-DC converter is connected to a low-voltage battery through an ignition switch and started up by the ignition switch. A transformation unit transforms a voltage inputted from a high-voltage battery and supplies the voltage to the low-voltage battery. A control circuit calculates a wiring resistance between the transformation unit and the low-voltage battery based on the voltage inputted from the low-voltage battery through the ignition switch in connecting the ignition switch and an output voltage and an output current of the transformation unit. The control circuit corrects a command value of the output voltage of the transformation unit based on the calculated wiring resistance to control the output voltage of the transformation unit. The invention can be applied to a DC-DC converter for electric-powered vehicle.

DC-DC converter

A power-supply control device for battery having a plurality of cells connected in series has a voltage conversion unit that steps down a voltage at the battery to supply the stepped-down voltage to a first load, a first opening and closing unit that opens and closes a supply path of first power from the battery to the voltage conversion unit and a second load, a battery control unit that detects abnormality of the battery, controls opening and closing of the first opening and closing unit, and is operated by second power supplied from the battery or third power supplied from the voltage conversion unit, the second power being lower than the first power, and a second opening and closing unit that opens and closes a supply path of the second power from the battery to the battery control unit.

Power-supply control device

A DC-DC converter includes a power conversion unit, a load amount detector, a charge detector that detects whether or not a battery is being charged, a switching frequency setting unit, and a switching controller. The load amount detector detects a load amount of the power conversion unit. The switching frequency setting unit sets a switching frequency of a switching element based on the load amount when the charge detector detects that the battery is not being charged, and sets the switching frequency of the switching element to a predetermined value when the charge detector detects that the battery is being charged.

A system simplification can be achieved by reducing the number of sensors required to detect currents and voltages when an output current is estimated. A switching power supply deviceincludes a current transformer, a switching circuit, a rectifying circuit, a smoothing circuit, an input voltage detecting circuit, a control part, an output voltage detecting circuitand a PWM signal generating part. The control partcalculates a duty rate and an average value of voltage of the secondary side voltage of the current transformerdetected by the input voltage detecting circuitbased on a waveform of the detected voltage. The control partcalculates an output current lo based on the calculated duty rate, the calculated average value of voltage and an output voltage Vo detected by the output voltage detecting circuit

Switching power supply device having a controller to calculate the duty rate and output current

A similarity degree calculating unit calculates a similarity degree of a feature quantity of a face image of an imaged checking target, and a feature quantity of a face image of a registrant or a non-registrant registered in a registrant information DB or a non-registrant information DB. A check determination unit notifies a service determination unit when the similarity degree is higher than a threshold value. A related information acquiring unit acquires related information including inter-registrant information, and provides to a time-series information DB generation unit and the service determination unit. The time-series information DB generation unit updates the time-series information DB. A statistical information DB generation unit generates the statistical information DB from the time-series information DB. The service determination unit provides services based on the related information, the time-series information DB, and the statistical information DB.

Vehicle operation control device and method, as well as, program

A measurement device has a light source, an imaging device, and a distance measuring section The distance measuring section obtains a distance between the imaging device and a person based on a presence of occurrence of a red-eye effect at an eye of the person in an image in which the person irradiated with an illumination light emitted from the light source is imaged by the imaging device, and a distance between an optical axis of the imaging device and the light source.

Growing community of inventors

Kasugai, Japan

Yasumichi Omoto