Denso Corporation

Nippon Soken, Inc.

Toyota Jidosha Kabushiki Kaisha

Asmo Co., Ltd.

Denso Corpora Tion

So-ken Corporation

Ibaraki University

Yuji Hayashi

Seiji Iyasu

Yuichi Handa

Kimikazu Nakamura

Norihito Kimura

Keiji Shigeoka

Hideki Itou

Tomoyuki Kikuta

Shuji Kurauchi

Kiyoshi Nagata

Yuuichi Handa

Masaya Ootake

Tsuyoshi Yamashita

Kenji Tomita

Eiji Ina

Naoki Yamamoto

Keita Kawai

Hirofumi Kinjou

Keita Saito

Hiroyasu Baba

Kaoru Koketsu

Shinji Ichikawa

Hiroaki Yuasa

Koji Kawasaki

Nobumasa Ueda

Yukihiro Matsushita

Hiroyuki Sakakibara

Hirofumi Kinjo

Masamichi Ishikawa

Tatsuya Murakami

Takuto Suzuki

Kohei Toyama

Yuuki Tsutsu

Satoru Yoshikawa

Satoshi Takada

Masakazu Fukada

Yoshiki Suzuki

Yuta Doi

Takashi Sumi

Masatoshi Uno

A power conversion apparatus connected to three or more voltage units, includes three or more power conversion circuits connected to respective units of the three or more voltage units; and a multiport transformer connected to the three or more power conversion circuits at mutually different ports, in which at least one voltage unit of the three or more voltage units is an electrical load.

Power conversion apparatus

A vehicle-mounted sensor cleaning device cleans a sensing surface of a vehicle-mounted sensor. The vehicle-mounted sensor cleaning device includes a gas nozzle spraying a gas toward the sensing surface, a gas supply device supplying the gas to the gas nozzle, and a control section controlling operation of the gas supply device. A predetermined value is set in the control section, for indicating an abnormal state of detection accuracy of the vehicle-mounted sensor based on detection accuracy information of an object which is obtained from the vehicle-mounted sensor. A gas supply threshold value is also set, for use in operating the gas supply device to direct a supply of the gas toward the sensing surface before the detection accuracy information becomes equal to or lower than the predetermined value. If the detection accuracy information has become lower than the gas supply threshold value, the control section operates the gas supply device.

Vehicle-mounted sensor cleaning device

A control apparatus is provided for controlling an electric power conversion apparatus. The electric power conversion apparatus includes a reactor and a drive switch and is configured to convert one of an AC voltage and a DC voltage into the other of the AC voltage and the DC voltage. The control apparatus is configured to: acquire a current detection value that is a detected value of reactor current flowing through the reactor; acquire the AC voltage; calculate, based on the AC voltage, a command value of the reactor current; set a correction value based on the AC voltage; calculate a post-correction current detection value by subtracting the correction value from the current detection value; and operate the drive switch through peak current mode control, thereby controlling the post-correction current detection value to be in agreement with the command value.

Control apparatus for electric power conversion apparatus

An electric power conversion apparatus includes a main DC-to-DC converter and an electric power conversion unit. The main DC-to-DC converter is configured to perform voltage conversion between a first-voltage section that operates at a first voltage and a second-voltage section that operates at a second voltage. The electric power conversion unit is connected with the first-voltage section and includes an electric power conversion section and an auxiliary DC-to-DC converter. The electric power conversion section is configured to perform electric power conversion between the first-voltage section and a third-voltage section that operates at a third voltage. The auxiliary DC-to-DC converter is connected in parallel with the main DC-to-DC converter. The auxiliary DC-to-DC converter shares a common configuration section with the electric power conversion section. The common configuration section is constituted of at least part of the electric power conversion section.

Electric power conversion apparatus

The control apparatus is used with the electrical power converter working to an inputted one of ac voltage and a terminal-to-terminal voltage at a capacitor into the other. The control apparatus calculates a sine-wave command value for a reactor current based on the ac voltage and an amplitude command value indicating an amplitude of the reactor current. The control apparatus also operates switches SW in peak-current mode control to bring the reactor current into agreement with a command value for the reactor current to which a current correction value is added. The control apparatus sets the current correction value to include a component of fluctuation in the terminal-to-terminal voltage at the capacitor based on the ac voltage Vac.

Control apparatus for electrical power converter

A control device is applied to a power conversion system including a first power conversion device and a second power conversion device connected in parallel with a common power supply target. The control device acquires a load output including a load current or power to be supplied to the power supply target, and control operation of the first power conversion device and the second power conversion device based on at least any of a voltage parameter including any of an input voltage and an output voltage and the load output.

Power conversion system control device and control system

In a control apparatus for a power converter, a current obtainer obtains a current flowing through an inductor as an inductor current, and an alternating-current voltage obtainer obtains an alternating-current voltage. A drive signal outputting unit generates, based on the alternating-current voltage obtained by the voltage obtainer, a sinusoidal command. The drive signal outputting unit performs peak-current mode control to output a drive signal that controls switching of the drive switch to thereby cause the inductor current to follow the sinusoidal command. A delay unit delays, for one switching cycle of the drive switch, an off-switching timing of the drive switch in accordance with the alternating-current voltage. The drive signal defines the off-switching timing of the switch.

Control apparatus for power converter

A power conversion apparatus performs power conversion among at least a first device, a second device, and a third device. The power conversion apparatus includes a primary converter configured to perform power conversion between the first device and second device. The primary converter includes a first switch, a second switch, a third switch, a fourth switch, and a capacitor. The second switch, the third switch, the fourth switch, and the capacitor are connected in full bridge configuration to constitute a full bridge converter.

Full bridge configuration power conversion apparatus for power conversion among at least three devices

An onboard optical sensor cleaning device ejects fluid against a sensing surface of an onboard optical sensor installed in a vehicle and removes foreign matter from the sensing surface. The onboard optical sensor cleaning device includes a cleaning liquid ejection port that ejects supplied cleaning liquid and an air ejection port that ejects supplied air. The cleaning liquid ejection port and the air ejection port are independent from each other, an air ejection axis of the air ejection port is set so that the ejected air mixes with the cleaning liquid ejected from the cleaning liquid ejection port and to be directed toward the sensing surface.

Onboard optical sensor cleaning device

A control device is applied to a power conversion system including a first DDC and a second DDC connected in parallel with a common power supply target. The control device performs the equalization control of correcting, with an output correction voltage, at least any of a voltage command value of the first DDC and a voltage command value of the second DDC to equalize an output current. Moreover, while the equalization control is being performed, it is determined on which one of an output side of the first DDC or an output side of the second DDC abnormal disconnection has been caused based on the output correction voltage.

Power conversion system control device

In an apparatus for controlling a DC-AC converter including a reactor and a plurality of drive switches and configured to convert DC power supplied via input terminals into AC power and supply the AC power to an AC power source connected to output terminals. In the apparatus, a current corrector is configured to set a current correction value including a harmonic component for a frequency component of a supply voltage of the AC power source that has minima at zero crossings where the supply voltage is zero and superimpose the current correction value on a sinusoidal commanded current generated based on the supply voltage of the AC power source, thereby generating a commanded current after correction. A current controller is configured to operate the drive switches using peak current mode control to control the reactor current to the commanded current after correction.

Apparatus for controlling DC-AC converter to reduce distortions in output current

In a control apparatus for a power converter, a current obtainer obtains a current flowing through an inductor as an inductor current, and a voltage obtainer obtains an alternating-current voltage. A slope compensation unit generates, based on the alternating-current voltage obtained by the voltage obtainer, a slope compensation signal having a slope that depends on the alternating-current voltage, and adds the slope compensation signal to the inductor current obtained by the current obtainer. A current controller controls on-off switching operations of a switch in a peak current mode to thereby cause the inductor current, to which the slope compensation signal has been added, to follow a sinusoidal command current that depends on the alternating-current voltage.

An electric power conversion device has an electric power converter and a control device. The control device adjusts an output voltage of the electric power converter to approach a first current flowing a first drive switch to an instruction current during a first period in which an input voltage supplied from an AC power source has a positive polarity, and adjusts the output voltage of the electric power converter to approach a second current flowing a second drive switch to the instruction current during a second period in which the input voltage supplied from the AC power source has a negative polarity. The control device operates a switch arranged in a second current sensor during the first period, and operates a switch arranged in a first current sensor during the second period.

Bridge-less type electric power conversion device having current detection circuit of current transformer type

Growing community of inventors

Kasugai, Japan

Yuji Hayashi