Hybrid wireless power transmitting system and method therefor

• US 10,014,725 B2
• Filed: 11/15/2013
• Issued: 07/03/2018
• Est. Priority Date: 10/31/2013
• Status: Active Grant

• Current Assignee: GE Hybrid Technologies, LLC (General Electric Company)
• Original Assignee: GE Hybrid Technologies, LLC (General Electric Company)
• Inventors: Jung, Chun-Kil, Hwang, Byong-Uk
• Primary Examiner(s): Donovan, Lincoln
• Assistant Examiner(s): Retebo, Metasebia
• Application Number:
  US15/033,449
• Publication Number:
  US 20160254705A1
• Time in Patent Office: 1,691 Days
• Field of Search: 307104
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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 7/00302 Overcharge protection

Abstract

The present invention provides a signal processing method performed by a hybrid wireless power transmitting apparatus which is configured to transmit wireless power signals based on magnetic resonance and magnetic induction, the method comprising transmitting a first object detection signal via an inductive power transmitting unit and a second object detection signal via a magnetic resonant power transmitting unit alternatively; operating one of the inductive power transmitting unit and the magnetic resonant power transmitting unit which is selected based on an inductive response signal and a resonant response signal corresponding to the first object detection signal and the second object detection signal respectively; and transmitting wireless power signal via the selected power transmitting unit; and a hybrid wireless power transmitting apparatus using the method.

Claims

1. A hybrid wireless power receiving apparatus comprising:

a receiving coil configured to receive an inductive power signal;

an antenna configured to locate around the receiving coil and to receive a resonant power signal;

a rectifying unit configured to generate rectified power by rectifying an alternative power generated from the inductive power signal and the resonant power signal;

a converter configured to convert the rectified power;

a voltage stabilization circuit connected between the rectifying unit and the converter; and

a receiving controller configured to;

control supply of the rectified power to the voltage stabilization circuit if the resonant power signal and the inductive power signal are received at an initial stage, and

control supply of the rectified power to the converter after turning off the voltage stabilization circuit if a power rectified by the resonant power signal and the inductive power signal is determined to be within a reference range.

2. The hybrid wireless power receiving apparatus of claim 1, further comprising a variable condenser connected to the antenna, wherein the receiving controller is further configured to control to receive an initial resonant power signal at a receiving frequency separated from a resonant frequency by adjusting the variable condenser if the antenna detects a magnetic resonant based wireless power transmitting apparatus.

3. The hybrid wireless power receiving apparatus of claim 2, wherein the receiving controller is further configured to control reception of the resonant power signal at the resonant frequency by re-adjusting the variable condenser after a reference time elapses from the reception time of the initial resonant power signal.

4. The hybrid wireless power receiving apparatus of claim 1, further comprising a near communication module configured to transmit charging status information generated by the resonant power signal.

5. The hybrid wireless power receiving apparatus of claim 1, further comprising a voltage sensor connected between the rectifying unit and the converter, wherein the receiving controller is further configured to control supply of the rectified power to the converter after turning off the voltage stabilization circuit if a voltage measured by the voltage sensor becomes within the reference range.

6. The hybrid wireless power receiving apparatus of claim 1, wherein the rectifying unit includes:

a resonant rectifying unit configured to rectify a power generated by the resonant power signal;

an inductive rectifying unit configured to rectify a power generated by the inductive power signal; and

a switching unit configured to select one of the resonant rectifying unit and the inductive rectifying unit.