Kabushiki Kaisha Toyota Jidoshokki

Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Jikoshikki

Shimpei Sakoda

Kazuyoshi Takada

Sadanori Suzuki

Shinji Ichikawa

Yukihiro Yamamoto

Kenichi Nakata

Toru Nakamura

Tetsuhiro Ishikawa

Yasuhiro Koike

Sergey Moiseev

Kiminori Ozaki

Hiroaki Asano

Tadashi Kondo

Masanori Tsuzaka

Power supply equipment () is provided with an AC power supply () and a primary-side resonance coil (). Movable body equipment () is provided with a secondary-side resonance coil (), which receives power from the primary-side coil, a rectifier (), which rectifies the received power, a charger () to which the rectified power is supplied, and a secondary battery (), which is connected to the charger. A primary matching unit () is provided between the AC power supply () and the primary-side resonance coil (). A secondary matching unit () is provided between the secondary-side resonance coil () and the rectifier (). A control unit is provided to either the power supply equipment () or the movable body equipment (). The control unit controls a primary matching unit adjustment unit () and a secondary matching unit adjustment unit (). In order to efficiently transfer power from the primary side to the secondary side when charging the secondary battery, the control unit initially adjusts the secondary matching unit (). After adjusting the secondary matching unit (), the control unit adjusts the first matching unit ().

Resonance-type non-contact power supply system, and adjustment method for matching unit during charging of resonance-type non-contact power supply system

Power reception equipment () is provided with: a secondary side resonance coil () which receives power from a primary side resonance coil () of power supply equipment (); and a rectifier () which rectifies the received power. The power reception equipment is further provided with: a secondary matching unit () which is provided between the secondary side resonance coil () and the rectifier (); a charger () to which rectified electric power is supplied; a power storage device () which is connected to the charger; and a control unit () which adjusts the secondary matching unit when the power storage device is being charged. The control unit stores, as data on a storage device (), the relationship between the charge power from the power supply equipment during the power ascension phase and the matching status of the secondary matching unit () when charging. During the phase in which the power output from the supply equipment is reduced, the control unit adjusts, on the basis of the data stored in the storage device during the power ascension phase, the secondary matching unit () so as to reach a suitable status corresponding to the charge power.

Power reception equipment for resonance-type non-contact power supply system

A non-contact power transmission apparatus includes a high-frequency converting section, which converts input voltage to high-frequency voltage and outputs it, a primary coil, which receives high-frequency voltage from the high-frequency converting section, and a secondary coil, which receives electric power from the primary coil. The non-contact power transmission apparatus further includes a load to which the electric power received by the secondary coil is supplied, a rectifier located between the secondary coil and the load, and an output adjusting section, which supplies, as pulses, output voltage to the high-frequency converting section. The output adjusting section is configured to increase or reduce output to the load by adjusting a duty cycle of the pulse output.

Non-contact power transmission apparatus

Movable body equipment is provided with: a secondary-side resonance coil, which receives power from a primary-side resonance coil of power supply equipment; a rectifier, which rectifies the power received by the secondary-side resonance coil; and a secondary battery, to which to which the power rectified by the rectifier is supplied. A resonance-type non-contact power supply system is provided with: state of charge detection units, which detect the state of charge of the secondary battery; and an impedance estimation unit, which estimates an impedance estimation value for the secondary battery on the basis of the state of charge of the secondary battery. When the absolute value of the difference between the impedance estimation value and the current impedance value of the secondary battery exceeds a threshold, a determination unit determines that a foreign body is present between the primary-side resonance coil and the secondary-side resonance coil.

Resonance-type non-contact power supply system

A power feeding system is provided, in which a detected value of reflected power at a power supply device in a power feeding installation is sent from the power feeding installation to a vehicle via a first communication device, the vehicle has an impedance matching device for adjusting an impedance at a resonance system that is constituted of a power transmission resonator, including a primary self-resonant coil and a primary coil in the power feeding installation, and a power receiving resonator, including a secondary self-resonant coil and a secondary coil in the vehicle, and the impedance matching device is controlled based on the detected value of the reflected power at the power supply device, which has been received from the power feeding installation.

Power feeding system and vehicle

An induction device includes a casing, a coil retainer, a coil that is disposed in the casing and retained to the coil retainer and a core that is disposed in the casing. The coil extends spirally around the core. The core and the coil retainer are fixed to the casing separately.

Induction device

A vehicle includes a power reception terminal, a charger and a non-contact power reception unit. The power reception terminal is configured to be electrically connectable to an AC power supply. The charger is configured to convert AC electric power inputted from the power reception terminal to a predetermined DC voltage. The non-contact power reception unit is configured to be magnetically coupled to a power transmission unit of an AC power supply to receive electric power from the AC power supply in a non-contact manner. The non-contact power reception unit is connected to a power conversion circuit of the charger.

Vehicle charging apparatus for charging a power storage device mounted on a vehicle

An electronic device includes a shielding member, an electric circuit, and a filter capacitor. The electric circuit has an output line and is arranged inside the shielding member. The filter capacitor is arranged outside the shielding member to be connected to the output line.

Electronic device

A resonance type non-contact charging apparatus is disclosed. A charger of the apparatus receives the high frequency power from a secondary side resonance coil of the apparatus. A power ratio detecting section of the apparatus detects the ratio of the reflected power from a primary side resonance coil to the high frequency power source with respect to the output power from the high frequency power source to the primary side resonance coil. A stop control section of the apparatus stops the high frequency power source when the ratio detected by the power ratio detecting section becomes greater than or equal to a predetermined threshold value.

Resonance type non-contact charging apparatus

A resonance type non-contact charging system is disclosed that includes a resonance system. The resonance system has a primary side resonance coil, a secondary side resonance coil, a reflected power detecting section, a power converting section having a DC/DC converter, and a battery. The charging system has a controlling section that controls the DC/DC converter. The controlling section controls the duty cycle of the DC/DC converter based on detection result of the reflected power detecting section such that the input impedance of the resonance system at the resonant frequency and the output impedance of a high-frequency power source match each other.

Resonance type non-contact charging apparatus that matches the input impedance of the resonance system with the output impedance of the AC power source

A resonance type non-contact power supply system is provided that includes power supplying equipment and an electric vehicle. The power supply equipment includes an alternating-current power source and a primary-side resonance coil for receiving power from the alternating-current power source. The electric vehicle includes power receiving equipment and a vehicle height control device mounted on the electric vehicle. The power receiving equipment includes a secondary-side resonance coil that receives power from the primary-side resonance coil, a rectifier that rectifies the power received by the secondary-side resonance coil, and an electrical storage device, to which the power rectified by the rectifier is supplied. A resonance system that includes the primary-side resonance coil and the secondary-side resonance coil is configured such that impedance thereof is adjusted by the use of the vehicle height control device when the electrical storage device is charged.

Resonance type non-contact power supply system for vehicle and electric vehicle

A non-contact power transmission apparatus having an AC power source and a resonance system is disclosed. The resonance system has a primary coil connected to the AC power source, a primary side resonance coil, a secondary side resonance coil, a secondary coil, and a load connected to the secondary coil. The primary side resonance coil is separated from the primary coil in an axial direction by a first distance, and the secondary coil is separated from the secondary side resonance coil in the axial direction by a second distance. At least one of the first distance and the second distance is adjusted to be a distance that is determined in advance in accordance with the impedance of the load so that the power transmission efficiency is maintained at a proper value.

A non-contact power transmission apparatus having a resonance system is disclosed. The resonance system includes a primary coil to which an alternating-current voltage from an alternating-current source is applied, a primary-side resonance coil, a secondary-side resonance coil, and a secondary coil to which a load is connected. The impedance of the primary coil is set such that the output impedance of the alternating-current source and the input impedance of the resonance system are matched to each other.

Non-contact power transmission apparatus and method for designing non-contact power transmission apparatus

A resonance type non-contact charging device includes a high frequency power source, a primary side resonant coil, a secondary side resonant coil, a charger, a secondary battery, and a stop control unit. The primary side resonant coil receives supply of high frequency electric power from the high frequency power source. The secondary side resonant coil is arranged apart from the primary side resonant coil in a non-contact manner. The secondary side resonant coil receives electric power from the primary side resonant coil through magnetic field resonance between the primary side resonant coil and the secondary side resonant coil. The charger receives supply of high frequency electric power from the secondary side resonant coil. The secondary battery is connected to the charger. The stop control unit stops the high frequency power source before stopping the charger when charging is to be stopped.

Growing community of inventors

Kariya, Japan

Shimpei Sakoda