WIRELESS POWER RECEIVING APPARATUS AND CONTROL METHOD FOR SUCH APPARATUS

• US 20150130272A1
• Filed: 12/12/2014
• Published: 05/14/2015
• Est. Priority Date: 09/21/2011
• Status: Abandoned Application

• Current Assignee: Pioneer Corporation
• Original Assignee: Pioneer Corporation
• Inventors: SUZUKI, Masami, URUSHIBATA, Eiichi, IWAWAKI, Keisuke
• Application Number:
  US14/568,470
• Publication Number:
  US 20150130272A1
• Time in Patent Office: Days
• US Class Current: 307/9.1
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: B60L 53/37 using optical position determination, e.g. using cameras
• CPC Class Codes: B60L 53/39 with position-responsive activation of primary coils
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

A wireless power transmitting apparatus (10) is a wireless power transmitting apparatus which transmits electric power in a wireless manner by electromagnetic induction to a power receiving apparatus (20) which is provided with a power reception coil (220) and a fixed capacitance capacitor (230) electrically connected in parallel with the power reception coil. The wireless power transmitting apparatus is provided with: an alternating current power supply (110) which generates alternating current power; a power transmission coil (120) which is electrically connected to the alternating current power supply; a variable capacitance capacitor (130) which is electrically connected in series with the power transmission coil; and a capacitance controlling device (140) which controls a capacitance value of the variable capacitance capacitor to reduce a phase difference between a voltage phase and a current phase of the alternating current power.

Claims

1. A wireless power receiving apparatus which receives electric power transmitted from a power transmitting apparatus in a wireless manner by electromagnetic induction, said wireless power receiving apparatus comprising:

a power reception coil;

a variable capacitance capacitor which is electrically connected with the power reception coil;

a storing device configured to store therein type of a moving body in which said wireless power receiving apparatus is disposed; and

a capacitance controlling device configured to control capacitance of the variable capacitance capacitor on the basis of the type stored in the storing device.

2. The wireless power receiving apparatus according to claim 1, wherein

said wireless power receiving apparatus further comprises a coupling coefficient conversing device configured to convert the type of the moving body into a coupling coefficient indicating extent of magnetic coupling of a power transmission coil of the power transmitting apparatus and the power reception coil, and

the capacitance controlling device controls the capacitance of the variable capacitance capacitor on the basis of the converted coupling coefficient.

3. The wireless power receiving apparatus according to claim 2, wherein

the storing device is a database configured to store therein information of an electric vehicle in which said wireless power receiving apparatus is disposed, and

the type of the moving body is information which is included in the information, stored in the database, and which indicates a vehicle type of the electric vehicle in which said wireless power receiving apparatus is disposed.

4. A control method in a wireless power receiving apparatus which has a power reception coil, a variable capacitance capacitor electrically connected with the power reception coil and a type storing device configured to store therein type of a moving body, and which receives electric power transmitted from a power transmitting apparatus in a wireless manner by electromagnetic induction, said control method comprising:

a obtaining process which obtains the type stored in the type storing device; and

a capacitance controlling process which controls capacitance of the variable capacitance capacitor on the basis of obtained type.

5. The control method according to claim 4, wherein

said control method further comprises a coupling coefficient conversing process which converts the type of the moving body into a coupling coefficient indicating extent of magnetic coupling of a power transmission coil of the power transmitting apparatus and the power reception coil, and

the capacitance controlling process controls the capacitance of the variable capacitance capacitor on the basis of the converted coupling coefficient.

6. The control method according to claim 5, wherein

the storing device is a database configured to store therein information of an electric vehicle in which said wireless power receiving apparatus is disposed, and

the type of the moving body is information which is included in the information stored in the database, and which indicates a vehicle type of the electric vehicle in which said wireless power receiving apparatus is disposed.