METHOD AND APPARATUS FOR CONTROLLING WIRELESS POWER TRANSMISSION

• US 20140265615A1
• Filed: 01/16/2014
• Published: 09/18/2014
• Est. Priority Date: 03/18/2013
• Status: Active Grant

• Current Assignee: Korea Advanced Institute of Science and Technology, Samsung Electronics Co. Ltd.
• Original Assignee: Korea Advanced Institute of Science and Technology, Samsung Electronics Co. Ltd.
• Inventors: KIM, Bong Chul, KWON, Sang Wook, KIM, Ki Young, KIM, Nam Yun, MOON, Gun Woo, AHN, Chi Hyung, CHO, Shin Young, MOON, Sang Cheol
• Granted Patent: US 9,608,471 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: B60L 2210/30 AC to DC converters
• CPC Class Codes: B60L 2210/40 DC to AC converters
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• 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 53/302 Cooling of charging equipment
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: H02J 3/18 Arrangements for adjusting, eliminating or compensating reactive power in networks for adjustment of voltage H02J3/16
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• 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 10/72 Electric energy management in electromobility
• 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 method and an apparatus for controlling wireless power transmission are provided. An apparatus for controlling wireless power transmission includes a controller configured to determine an output voltage of a power factor correction unit based on charging information of a battery, the power factor correction unit configured to correct an input voltage into the determined output voltage, and output a variable voltage, and a resonance unit configured to transmit power converted from the variable voltage to a wireless power reception apparatus.

Claims

1. An apparatus for controlling wireless power transmission, comprising:

a controller configured to determine an output voltage of a power factor correction unit based on charging information of a battery;

the power factor correction unit configured to correct an input voltage into the determined output voltage, and output a variable voltage; and

a resonance unit configured to transmit power converted from the variable voltage to a wireless power reception apparatus.

2. The apparatus of claim 1, wherein the charging information is obtained from the wireless power reception apparatus, and comprises at least one of a charging level, a charging capacity, and a charging type of the battery.

3. The apparatus of claim 1, wherein the power factor correction unit is configured to obtain the input voltage from a power supply, and to output the variable voltage based on a result of the determining of the controller;

and

the resonance unit is configured to transmit the power converted from the variable voltage to an alternating current (AC) voltage using a resonant frequency of a resonator to the wireless power reception apparatus.

4. The apparatus of claim 3, further comprising:

an inverter configured to convert a fixed output voltage into an AC voltage based on a variable frequency,

wherein the power factor correction unit is configured to output the fixed output voltage.

5. The apparatus of claim 4, wherein the controller is configured to determine a value of the variable frequency in a resonant frequency band of the resonator, based on the obtained charging information of the battery.

6. The apparatus of claim 4, wherein the controller comprises:

a gain calculator configured to calculate a voltage gain with respect to the output voltage of the power factor correction unit, based on a value of a voltage to be applied to the battery; and

a frequency determiner configured to determine a value of the variable frequency, among frequencies having transmission efficiencies greater than or equal to a predetermined transmission efficiency, based on a transmission efficiency allowing for the calculated voltage gain,

wherein the value of the voltage to be applied to the battery is obtained from the wireless power reception apparatus.

7. The apparatus of claim 3, further comprising:

an inverter configured to convert an output voltage of the power factor correction unit into an AC voltage based on a variable frequency,

wherein the controller is configured to determine a value of the variable frequency in a resonant frequency band of the resonator and the output voltage of the power factor correction unit, based on the obtained charging information of the battery.

8. The apparatus of claim 1, further comprising:

a communication unit configured to receive the charging information of the battery from the wireless power reception apparatus.

9. An apparatus for controlling wireless power transmission, comprising:

a controller configured to determine a variable frequency of an inverter based on charging information of a battery;

the inverter configured to convert an input voltage into an alternating (AC) voltage based on the determined variable frequency; and

a resonance unit configured to transmit power converted into the AC voltage to a wireless power reception apparatus.

10. The apparatus of claim 9, wherein the charging information is obtained from the wireless power reception apparatus, and comprises at least one of a charging level, a charging capacity, and a charging type of the battery.

11. The apparatus of claim 9, wherein the input voltage to the inverter is obtained from a power supply;

and

the resonance unit is configured to transmit the power converted into the AC voltage using the variable frequency as a resonant frequency of a resonator to the wireless power reception apparatus.

12. The apparatus of claim 11, further comprising:

a power factor correction unit configured to correct an input voltage from a power supply into the determined output voltage, to output a variable voltage based on a result of the determining by the controller,

wherein the inverter is configured to convert the variable voltage into an AC voltage using a basic resonant frequency of the resonator.

13. The apparatus of claim 12, wherein the controller is configured to determine the output voltage of the power factor correction unit based on the obtained charging information of the battery.

14. The apparatus of claim 11, wherein the controller comprises:

a gain calculator configured to calculate a voltage gain with respect to the input voltage, based on a value of a voltage to be applied to the battery; and

a frequency determiner configured to determine a value of the variable frequency, among frequencies having transmission efficiencies greater than or equal to a predetermined transmission efficiency, based on a transmission efficiency allowing for the calculated voltage gain,

wherein the value of the voltage to be applied to the battery is obtained from the wireless power reception apparatus.

15. The apparatus of claim 11, further comprising:

a power factor correction unit configured to correct the input voltage into the determined output voltage and output a variable voltage based on a result of the determining by the controller,

wherein the controller is configured to determine a value of the variable frequency in a resonant frequency band of the resonator and the output voltage of the power factor correction unit, based on the obtained charging information of the battery.

16. The apparatus of claim 9, further comprising:

a communication unit configured to receive the charging information of the battery from the wireless power reception apparatus.

17. An apparatus for controlling wireless power transmission, comprising:

a controller configured to determine an output voltage of a power factor correction unit and a variable frequency of an inverter, based on charging information of a battery;

the power factor correction unit configured to correct an input voltage into the determined output voltage, to output a variable voltage based on a result of the determining by the controller;

the inverter configured to convert the variable voltage into an alternating (AC) voltage based on the determined variable frequency; and

a resonance unit configured to transmit power converted into the AC voltage to a wireless power reception apparatus.

18. The apparatus of claim 17, wherein the charging information is obtained from the wireless power reception apparatus, and comprises at least one of a charging level, a charging capacity, and a charging type of the battery;

the power factor correction unit is configured to obtain the input voltage from a power supply; and

the resonance unit is configured to transmit the power converted into the AC voltage using the variable frequency as a resonant frequency of a resonator to the wireless power reception apparatus.

19. The apparatus of claim 18, wherein the controller comprises:

a gain calculator configured to calculate a voltage gain with respect to the output voltage of the power factor correction unit, based on a value of a voltage to be applied to the battery;

a frequency determiner configured to determine a value of the variable frequency, among frequencies having transmission efficiencies greater than or equal to a predetermined transmission efficiency, based on a transmission efficiency allowing for the calculated voltage gain; and

a voltage determiner configured to an output voltage of the power factor correction unit based on the transmission efficiency,

wherein the value of the voltage to be applied to the battery is obtained from the wireless power reception apparatus.

20. The apparatus of claim 17, further comprising:

a communication unit configured to receive charging information of the battery from the wireless power reception apparatus.

21. A method for controlling power transmission, the method comprising:

determining an output voltage of a power factor correction unit based on charging information of a battery;

correcting an input voltage to the power factor correction unit into the determined output voltage, and outputting a variable voltage that varies based on a result of the determining; and

transmitting power converted from the variable voltage into an alternating (AC) voltage to a wireless power reception apparatus.

22. The method of claim 21, wherein the determining of the output voltage is performed with a controller of an apparatus for controlling wireless power transmission;

and

the charging information is obtained from the wireless power reception apparatus.

23. The method of claim 22, wherein the determining of the output voltage comprises:

calculating, by the controller, a voltage gain with respect to the output voltage of the power factor correction unit, based on a value of a voltage to be applied to the battery; and

determining, by the controller, a value of the variable frequency, among frequencies having transmission efficiencies greater than or equal to a predetermined transmission efficiency, based on a transmission efficiency allowing for the calculated voltage gain,

wherein the value of the voltage to be applied to the battery is obtained from the wireless power reception apparatus.