Resonance power generation apparatus

• US 8,674,557 B2
• Filed: 04/05/2011
• Issued: 03/18/2014
• Est. Priority Date: 04/08/2010
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Nam Yun, Park, Eun Seok, Kwon, Sang Wook, Hong, Young Tack, Ryu, Young Ho
• Primary Examiner(s): Deberadinis, Robert L.
• Application Number:
  US13/079,883
• Publication Number:
  US 20110248571A1
• Time in Patent Office: 1,078 Days
• Field of Search: 307/140
• US Class Current: 307/140
• 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: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields

Abstract

Provided are a resonance power generation apparatus and method for wireless power transmission. The resonance power generation apparatus may include a voltage controller to receive an input of an alternating current (AC) signal of a first frequency band and to output a direct current (DC) voltage having a constant level, a power converter to separate the DC voltage into a voltage waveform and a current waveform by a switching pulse signal of a second frequency band, and a resonance power generator to generate an AC resonance power from the voltage waveform and the current waveform.

Claims

1. A resonance power generation apparatus, comprising:

a voltage controller to receive an input of an alternating current (AC) signal of a first frequency band, and to output a direct current (DC) voltage that has a constant level;

a power converter to separate the DC voltage into a voltage waveform and a current waveform by a switching pulse signal of a second frequency band;

a resonance power generator to generate an AC resonance power by combining the voltage waveform and the current waveform, and to remove a harmonic component; and

a controller to apply the switching pulse signal to the power converter.

2. The resonance power generation apparatus of claim 1, wherein the power converter comprises:

a switching device that is switched based on the switching pulse signal; and

a voltage accumulator to accumulate a voltage output via the switching device during a low level of the switching pulse signal.

3. The resonance power generation apparatus of claim 1, wherein the resonance power generator comprises:

a frequency resonating unit to generate an AC signal with a resonance frequency;

a matching transformer to generate an AC resonance power with a sine waveform from an AC signal output from the frequency resonating unit; and

a source resonator to transmit a generated resonance power to a target resonator.

4. The resonance power generation apparatus of claim 1, wherein the switching pulse signal comprises a sine wave signal or a square wave signal.

5. The resonance power generation apparatus of claim 1, wherein the controller drives signal levels of the voltage waveform and the current waveform that are output from the power converter, by adjusting a power level of the switching pulse signal.

6. The resonance power generation apparatus of claim 4, wherein the controller selects a switching pulse signal from among the sine wave signal and the square wave signal, based on a transmission efficiency and a distance to a target resonator, and provides the selected switching pulse signal to the power converter.

7. The resonance power generation apparatus of claim 1, wherein the second frequency band ranges from 500 kilohertz (KHz) to 20 megahertz (MHz).

8. The resonance power generation apparatus of claim 1, wherein the controller controls a duty rate of the switching pulse signal to be 10% to 90%.

9. The resonance power generation apparatus of claim 1, wherein the voltage waveform and the current waveform do not overlap with each other.

10. The resonance power generation apparatus of claim 1, wherein the controller controls the voltage controller such that an output voltage of the switching device in the power converter is less than or equal to a set value.

11. The resonance power generation apparatus of claim 1, wherein the AC signal of the first frequency band is generated by a high-speed switching scheme employing a high-speed switching device or by an oscillation scheme employing an oscillator.