POWER CONVERTER IN RESONANCE POWER TRANSMISSION SYSTEM, AND RESONANCE POWER TRANSMISSION APPARATUS

• US 20120056487A1
• Filed: 09/01/2011
• Published: 03/08/2012
• Est. Priority Date: 09/02/2010
• Status: Active Grant

• 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
• Granted Patent: US 9,553,456 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• 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 which may be used in a resonance power transmission system and an apparatus for transmitting a resonance power are provided. According to an aspect, a power converter in a resonance power transmission system may include: 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 the AC signal outputted from the first power converter, and to provide the AC signal where the odd harmonic is reduced or eliminated to a source resonator; and a second short circuit configured to reduce or eliminate an odd harmonic of the AC signal outputted from the second power converter, and to provide the AC signal where the odd harmonic is reduced or eliminated to the source resonator.

Claims

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

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 the AC signal outputted from the first power converter, and to provide the AC signal where the odd harmonic is reduced or eliminated to a source resonator; and

a second short circuit configured to reduce or eliminate an odd harmonic of the AC signal outputted from the second power converter, and to provide the AC signal where the odd harmonic is reduced or eliminated to the source resonator.

2. The power converter of claim 1, wherein the resonant frequency corresponds to a range from about 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 first short circuit includes a capacitor and an inductor, and

values of the capacitor and the inductor are determined based on a frequency of an odd harmonic component of the AC signal outputted from the first power converter.

5. The power converter of claim 1, wherein:

the second short circuit includes a capacitor and an inductor, and

values of the capacitor and the inductor are determined based on a frequency of an odd harmonic component of the AC signal outputted from the second power converter.

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

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 power 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 the AC signal outputted from the first power converter;

a second short circuit configured to reduce or eliminate an odd harmonic of the AC signal outputted from the second power converter; and

a source resonator 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.

7. The apparatus of claim 6, wherein:

the first short circuit includes a capacitor and an inductor, and

values of the capacitor and the inductor are determined based on a frequency of an odd harmonic component of the AC signal outputted from the first power converter.

8. The apparatus of claim 6, wherein:

the second short circuit includes a capacitor and an inductor, and

values of the capacitor and the inductor are determined based on a frequency of an odd harmonic component of the AC signal outputted from the second power converter.

9. The apparatus of claim 6, wherein the source resonator comprises:

a transmission line including a first signal conducting portion, a second 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.

10. The apparatus of claim 9, 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.

11. A power converter comprising:

at least one power converter circuit configured to receive a first signal to output a second signal; and

at least one harmonic eliminating circuit configured to reduce and/or eliminate an odd harmonic of the second signal.

12. The power converter of claim 11, wherein the power converter circuit comprises a switch.

13. The power converter of claim 12, wherein the switch is configured to receive a switching pulse signal.

14. The power converter of claim 11, wherein the first signal is direct current (DC) voltage of a predetermined level.

15. The power converter of claim 11, wherein the second signal is alternating current (AC).

16. The power converter of claim 11, wherein the at least one harmonic eliminating circuit comprises a capacitor and an inductor.

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

18. The power converter of claim 11, wherein the at least one power converter circuit comprises two power converter circuits, wherein the two power converter circuits are driven at opposite phase to each other.

19. A resonance power transmission system comprising the power converter of claim 11.

20. The resonance power transmission system of claim 19, further comprising:

a resonator device,

wherein the impedance of the at least one harmonic eliminating circuit is substantially the same as a resonator device.