Power converter in resonance power transmission system, and resonance power transmission apparatus

• US 9,553,456 B2
• Filed: 09/01/2011
• Issued: 01/24/2017
• Est. Priority Date: 09/02/2010
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Choi, Jin Sung, Kwon, Sang Wook, Park, Yun Kwon, Park, Eun Seok, Hong, Young Tack, Ryu, Young Ho, Kim, Nam Yun, Kim, Dong Zo
• Primary Examiner(s): KAPLAN, HAL IRA
• Application Number:
  US13/223,640
• Publication Number:
  US 20120056487A1
• Time in Patent Office: 1,972 Days
• Field of Search: 307/104, 320/108
• US Class Current: 1/1
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/50 using additional energy repeaters between transmitting devices and receiving devices
• CPC Class Codes: H02M 7/003 Constructional details, e.g. physical layout, assembly, wiring or busbar connections
• CPC Class Codes: H02M 7/48 using discharge tubes with control electrode or semiconductor devices with control electrode
• CPC Class Codes: H02M 7/4815 Resonant converters H02M7/4811 and H02M7/4826 take precedence
• CPC Class Codes: H03H 7/00 Multiple-port networks comprising only passive electrical elements as network components receiver input circuits H04B1/18; networks simulating a length of communication cable H04B3/40
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

A power converter for transmitting a resonance power is provided that includes: an input end that receives a direct current (DC) voltage of a predetermined level; a first power converter that converts the DC voltage of a predetermined level to an alternating current (AC) signal using a first switching pulse signal having substantially the same frequency as a resonant frequency; a second power converter that converts the DC voltage of a predetermined level to an AC signal using a second switching pulse signal having an opposite phase to the first switching pulse signal; a first short circuit that reduces or eliminates an odd harmonic of the AC signal outputted from the first power converter, and provides the AC signal; and a second short circuit that reduces or eliminates an odd harmonic of the AC signal outputted from the second power converter, and provides the AC signal.

Claims

1. A power converter in a resonance power transmission system, the power converter comprising:

a source resonator;

an input end configured to receive a direct current (DC) voltage of a predetermined level;

a first power converter configured to convert the DC voltage of a predetermined level to an alternating current (AC) signal using a first switching pulse signal having substantially the same frequency as a resonant frequency;

a second power converter configured to convert the DC voltage of a predetermined level to an AC signal using a second switching pulse signal having an opposite phase to the first switching pulse signal;

a first short circuit configured to reduce or eliminate an odd harmonic of only the AC signal directly outputted from the first power converter, and to provide the AC signal where the odd harmonic is reduced or eliminated to the source resonator, wherein the first short circuit comprises a first capacitor and a first inductor tuned to the source resonator, and values of the first capacitor and the first inductor are determined based on a frequency of an odd harmonic component of the AC signal outputted from the first power converter; and

a second short circuit configured to reduce or eliminate an odd harmonic of only the AC signal directly outputted from the second power converter, and to provide the AC signal where the odd harmonic is reduced or eliminated to the source resonator, wherein the second short circuit comprises a second capacitor and a second inductor tuned to the source resonator, and values of the second capacitor and the second inductor are determined based on a frequency of an odd harmonic component of the AC signal outputted from the second power converter,

wherein the first and second short circuits are further configured such that odd harmonic elements of the AC signal output from the first short circuit are of opposite phase to odd harmonic elements of the AC signal output from the second short circuit.

2. The power converter of claim 1, wherein the resonant frequency corresponds to a range from 2 to 20 MHz.

3. The power converter of claim 1, wherein the AC signal outputted from the first short circuit has an opposite phase to the AC signal outputted from the second short circuit.

4. The power converter of claim 1, wherein the resonant frequency is provided by the source resonator.

5. The power converter of claim 1, wherein the AC signal of the first short circuit is combined with the AC signal of the second short circuit and provided to the source resonator.

6. The power converter of claim 1, wherein the first power converter comprises a first Direct Current/Alternating Current (DC/AC) inverter and wherein the second power converter comprises a second DC/AC inverter configured to convert DC voltage to AC voltage.

7. The power converter of claim 1, wherein the first power converter is configured to convert the Direct Current (DC) voltage of a predetermined level to a first AC signal utilizing the first switching pulse, and

wherein the second power converter is configured to convert the DC voltage of the predetermined level to a second AC signal utilizing the second switching pulse.

8. The power converter of claim 6, wherein the first power converter further comprises a switching device configured to be turned on when the first switching pulse signal is at a maximum frequency and to be turned off when the second switching pulse signal is at a minimum frequency.

9. An apparatus for transmitting a resonance power, the apparatus comprising:

a source resonator;

a voltage control unit configured to receive an input of an alternating current (AC) signal of a first frequency band, and to output a direct current (DC) voltage of a predetermined level;

a first power converter configured to convert the DC voltage of a predetermined level to an AC signal using a first switching pulse signal of a second frequency band;

a second power converter configured to convert the DC voltage of a predetermined level to an AC signal using a second switching pulse signal having an opposite phase to the first switching pulse signal;

a first short circuit configured to reduce or eliminate an odd harmonic of only the AC signal directly outputted from the first power converter, wherein the first short circuit comprises a first capacitor and a first inductor tuned to the source resonator, and values of the first capacitor and the first inductor are determined based on a frequency of an odd harmonic component of the AC signal outputted from the first power converter; and

a second short circuit configured to reduce or eliminate an odd harmonic of only the AC signal directly outputted from the second power converter, wherein the second short circuit comprises a second capacitor and a second inductor tuned to the source resonator, and values of the second capacitor and the second inductor are determined based on a frequency of an odd harmonic component of the AC signal outputted from the second power converter;

wherein the source resonator is configured to transfer an AC power, corresponding to an output signal of the first short circuit and the second short circuit, to a target resonator, and

wherein the first and second short circuits are further configured such that odd harmonic elements of the output signal of the first short circuit are of opposite phase to odd harmonic elements of the output signal of the second short circuit.

10. The apparatus of claim 9, wherein the source resonator comprises:

a transmission line comprising a first signal conducting portion, a second signal conducting portion, and a ground conducting portion corresponding to the first signal conducting portion and the second signal conducting portion;

a first conductor configured to electrically connect the first signal conducting portion to the ground conducting portion;

a second conductor configured to electrically connect the second signal conducting portion to the ground conducting portion; and

at least one capacitor inserted between the first signal conducting portion and the second signal conducting portion in series with respect to a current flowing through the first signal conducting portion and the second signal conducting portion.

11. The apparatus of claim 10, wherein the source resonator further comprises:

a matcher, located inside a loop formed by the transmission line, the first conductor, and the second conductor, configured to adjust an impedance of the source resonator.

12. A power converter comprising:

a source resonator;

at least one power converter circuit configured to receive a first signal to output a first Alternating Current (AC) signal and a second AC signal, the at least one power converter circuit comprising a first power converter and a second power converter;

a first short circuit configured to reduce or eliminate an odd harmonic of only the first AC signal directly outputted from the first power converter, wherein the first short circuit comprises a first capacitor and a first inductor tuned to the source resonator, and values of the first capacitor and the first inductor are determined based on a frequency of an odd harmonic component of the first AC signal outputted from the first power converter; and

a second short circuit configured to reduce or eliminate an odd harmonic of only the second AC signal directly outputted from the second power converter, wherein the second short circuit comprises a second capacitor and a second inductor tuned to the source resonator, and values of the second capacitor and the second inductor are determined based on a frequency of an odd harmonic component of the second AC signal outputted from the second power converter,

wherein the first and second short circuits are configured such that odd harmonic elements of an output signal of the first short circuit are of opposite phase to odd harmonic elements of an output signal of the second short circuit.

13. The power converter of claim 12, wherein the power converter circuit further comprises a switch.

14. The power converter of claim 13, wherein the switch is configured to receive a switching pulse signal.

15. The power converter of claim 12, wherein the first signal is direct current (DC) voltage of a predetermined level.

16. The power converter of claim 12, wherein values for the first and second capacitor C and the first and second inductor L are determined based on the frequency of the odd harmonic fodd according to the following equation:

17. The power converter of claim 12, wherein the first power converter and the second power converter are driven at opposite phases to each other.

18. A resonance power transmission system comprising the power converter of claim 12.