Nissan Motor Company Limited

Renault S.a.s.

Toshihiro Kai

Kraisorn Throngnumchai

Shigeharu Yamagami

Throngnumchai Kraisorn

Keisuke Inoue

Kousuke Saito

Yuusuke Minagawa

Yusuke Minagawa

Yasuaki Hayami

Yuuya Yamauchi

Tetsuya Hayashi

Kengo Maikawa

Yusuke Zushi

Kentaro Shin

Taku Shimomura

Kentarou Shin

Yuji Naruse

Kraison Throngnumchai

Yuya Yamauchi

Giorgio Lovison

Throngnumachai Kraisorn

A control method of controlling a resonance type power conversion device including a voltage resonance circuit is provided. The voltage resonance circuit comprising, a choke coil connected to input power supply, a first switching element connected to the choke coil, a capacitor connected in parallel to the first switching element, and a resonance circuit connected between a connection point and an output terminal, the connection point being a point at which the choke coil and the first switching element are connected. The control method comprising, detecting a polarity of current flowing through parallel circuit connected in parallel to the first switching element by using a sensor included in the voltage resonance circuit; and controlling an operating condition of the first switching element depending on a polarity of the current detected by the sensor.

Control method for controlling resonance power converter, and resonance power converter

A method for controlling a power conversion device can prevent over temperature by suppressing a change in impedance of a capacitor included in a rectifier circuit. The power conversion device includes an AC wave generation circuit for generating an AC wave, and a rectifier circuit for rectifying the AC wave generated by the AC wave generation circuit with a configuration including a rectifier capacitor and a diode connected in parallel. The method for controlling the power conversion device regulates the AC wave input to the rectifier capacitor depending on a change in impedance of the rectifier capacitor so as to suppress the change in the impedance of the rectifier capacitor.

Method for controlling power conversion device and power conversion device

A method for controlling a power conversion device for converting power from a power supply by controlling an input to a resonance circuit comprising a resonance coil and a resonance capacitor, with a switching element, the method comprising simultaneously changing a switching frequency and a time ratio of the switching element so that the switching element satisfies a condition of zero-voltage switching when an output power of the power conversion device is changed.

Power conversion device and method for converting power from a power supply

A method for controlling a resonance type power converter including a first resonance circuit (L, C) and a shunt circuit (), which converts and outputs the power of the DC power supply, shunting a current flowing into a first capacitor (C) by controlling a second switching element (S) during a predetermined period within turn-off period of a first switching element (S), the first capacitor connected in parallel to the first switching element (S), the second switching element (S) included in the shunt circuit (), and the first switching element (S) operated in response to the resonance of the first resonance circuit (L, C).

Method for controlling resonant power conversion device, and resonant power conversion device

The present disclosure includes by controlling at least either one of a switching frequency of a switching element (S) or a duty ratio indicating an ON period of the switching element, securing delay time from voltage at both ends of the switching element reaches zero voltage by resonance of the resonant circuit (L, C) in an OFF state of the switching element until the switching element is turned on, and turning on the switching element within the delay time.

Method for controlling resonance-type power converter, resonance-type power converter, and DC-DC converter

A non-contact power feeding apparatus transmits, by at least magnetic coupling, an electric power in a non-contact manner to a power reception coil from a power transmission coil. The transmission coil is electrically connected to an alternating-current power source. The non-contact power feeding apparatus outputs an electric power to a load electrically connected to the power reception coil. The non-contact power feeding apparatus includes a coupling state estimator configured to estimate a coupling state between the power transmission coil and the power reception coil. The non-contact power feeding apparatus also includes an available output power calculator configured to calculate an available output power that can be output to the load, based on a limit value of a circuit element of a power feeding circuit including the power transmission coil and the power reception coil and on the coupling state.

Non-contact power feeding apparatus and non-contact power feeding method

A non-contact power feeding apparatus including a power transmitting coilreceiving supply of electric power from an AC power supply, a power receiving coilreceiving electric power transmitted from the power transmitting coilin a non-contacting manner, switching unit for switching connections with coilsto, output unit for outputting the electric power received from the power receiving coilto a loadthrough the switching unit, and controller for controlling the switching unit. The power receiving coilincludes a plurality of coilstosharing their coil axes, the switching unit is connected to the coilstoand switches polarity of the coilstoin accordance with interlinkage magnetic flux passes through each of the coilsto

Non-contact power feeding apparatus

There are provided with: a secondary windingto which an electric power is supplied in a non-contact manner from a primary windingby an alternating-current power source; a first circuit sectionconnected in parallel to the secondary winding; and a second circuit sectionconnected in series to a parallel circuit of the secondary windingand the first circuit section. An impedance of the first circuit sectionis larger than an impedance of the second circuit section.

A non-contact power supply device comprises: a primary winding (); and a secondary winding () to which an electric power is supplied from an alternating current power supply via the primary winding, wherein an impedance characteristic of Zwith respect to a frequency is such that a minimal value is provided in the proximity of a frequency of a fundamental wave component of the alternating current power supply and another impedance characteristic of Zwith respect to the frequency is such that the frequency of the fundamental wave component is provided between the frequency which is nearest to the frequency of the fundamental wave component and at which a maximal value is provided and the frequency which is nearest to the frequency of the fundamental wave component and at which the minimal value is provided.

Non-contact power supply device

As an aspect of the present invention, a noncontact power feeding apparatus includes: a power transmission resonator; and a power reception resonator configured to be magnetically coupled with the power transmission resonator by magnetic field resonance. The power transmission resonator is magnetically coupled with the power reception resonator by the magnetic field resonance, whereby electric power is supplied from an electric power source to the power reception resonator through the power transmission resonator. One of the power transmission resonator and the power reception resonator has a predetermined single resonant frequency, and the other one of the power transmission resonator and the power reception resonator has multiple resonant frequencies inclusive of the predetermined single resonant frequency.

Noncontact power feeding apparatus and noncontact power feeding method

A contactless power feeding apparatus includes a secondary winding to which power is supplied from a primary winding by an AC power supply. An impedance absolute-value characteristic of Zhas a frequency of a fundamental wave component to be between a frequency where a local maximum exists and that is nearest to the frequency of the fundamental wave component, and a frequency where a local minimum exists and that is nearest to the frequency of the fundamental wave component. An impedance absolute-value characteristic of Zhas the frequency of the fundamental wave component to be between a frequency where the local maximum exists and that is nearest to the frequency of the fundamental wave component, and a frequency where the local minimum exists and that is nearest to the frequency of the fundamental wave component.

Contactless power feeding apparatus

A non-contact charging device is provided with: a power receiving device which has at least a power receiving coil which receives electrical power, in a non-contact manner, from a power transmitting coil by means of a magnetic connection; a battery which is charged by the electrical power; a charge-state detection means, which detects the charge-state of the battery; a position detection means which detects the position of the power transmitting coil; and a charge time calculation means, which calculates a first charge time for the battery according to the charge-state as detected by the charge-state detection means and a first position of the power transmitting coil as detected by the position detection means.

Non-contact charging device

A non-contact charging device includes a power receiving device having at least a power receiving coilB which receives electric power from a power transmitting coilA in a non-contact manner by magnetic coupling; a batterywhich is charged by the electric power; a state-of-charge detection unit for detecting the state of charge of the battery; and a permissible charging range setting unit for setting a permissible charging range indicating the range of the position of the power transmitting coilA relative to the position of the power receiving coilB, in which the charging of the batteryis permitted, according to the state of charge detected by the state-of-charge detection unit.

A contactless electricity-supplying device () includes a secondary winding () to which electric power is supplied from a primary winding (), by an AC power supply (). The impedance characteristic (Z) of Zin regard to the frequency has a local maximum (Z) near the frequency (f) of the fundamental wave component of aforementioned AC power supply (); and the impedance characteristic (Z) of Zin regard to the frequency has the aforementioned frequency (f) of the fundamental wave component to be between, a frequency (f) that has its local maximum (Z) nearest to aforementioned frequency (f) of the fundamental wave component, and a frequency (f) that has its local minimum (Z) nearest to the frequency (f) of the fundamental wave component. Zindicates that the coupling coefficient (k) between aforementioned primary winding () and aforementioned secondary winding () is a prescribed value (0.3), and that it is an impedance of just the primary side (Z) as seen from the output side of aforementioned AC power supply (); and Zindicates that the coupling coefficient (k) between aforementioned primary winding () and aforementioned secondary winding () is the aforementioned prescribed value (0.3), and that it is an impedance of just the secondary side (Z) as seen from the side of a load () to be connected to aforementioned secondary winding ().

Contactless electricity-supplying device

In a power converter including an inverter configured to convert a direct current voltage into an alternating current voltage by controlling switching devices to be turned ON or OFF based on a control signal and to output the alternating current voltage to a load, a carrier wave frequency is changed. A command value is compensated in accordance with the changing carrier wave frequency. The control signal results from a comparison of the carrier wave with a compensated command value. As a result of the compensation, output fluctuations caused by an error voltage between the command value and an output voltage to the load can be suppressed.

Growing community of inventors

Yamato, Japan

Toshihiro Kai