Pinless power coupling

• US 9,666,360 B2
• Filed: 09/11/2013
• Issued: 05/30/2017
• Est. Priority Date: 01/29/2007
• Status: Active Grant

• Current Assignee: Powermat Technologies, Ltd.
• Original Assignee: Powermat Technologies, Ltd.
• Inventors: Ben-Shalom, Amir, Rofe, Arik, Azancot, Yossi, Greenwald, Oola
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): Perez Borroto, Alfonso
• Application Number:
  US14/024,051
• Publication Number:
  US 20140008997A1
• Time in Patent Office: 1,357 Days
• Field of Search: 307104
• CPC Class Codes: H01F 2027/2809 on stacked layers
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/2885 with shields or electrodes shields or electrodes for pancake coils H01F27/2871; construction of electric or magnetic shields or screens H01F27/36
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

A pin-less power coupling arrangement comprising at least one pin-less power jack; the power jack comprising a primary coil shielded behind an insulating layer for inductive coupling to a pin-less power plug; said power plug comprising a secondary coil wherein said insulating layer is substantially flat and said power plug and said power jack may be aligned by an alignment means. Various such alignment means are discussed as are enabled surfaces for supporting inductive power jacks and inductive plugs coupled to various appliances.

Claims

1. A method for regulating wireless power transfer from a primary unit operable to transmit power to a secondary unit operable to receive power, said primary unit comprising at least one primary coil, at least one driver, at least one primary microcontroller, and at least one primary signal receiver;

and said secondary unit comprising at least one secondary coil, at least one secondary microcontroller, and at least one secondary signal transmitter, the method comprising the following steps;

establishing a communication channel operable to transfer electromagnetic signals between said at least one primary signal receiver and said at least one secondary signal transmitter;

said primary unit transmitting detection pulses;

said secondary unit detecting said detection pulse;

said secondary unit transmitting a confirmation signal to said primary unit;

said primary unit receiving said confirmation signal;

said at least one driver providing a high frequency oscillating voltage across said at least one primary coil;

said at least one primary coil transmitting power to said at least one secondary coil;

said at least one secondary microcontroller monitoring power transferred to said at least one secondary coil;

said at least one secondary microcontroller generating a regulation signal;

said at least one secondary signal transmitter transmitting a regulation signal to said primary unit;

said at least one primary signal receiver receiving said regulation signal; and

said at least one primary microcontroller regulating the power transmitted according to said regulation signal.

2. The method of claim 1, wherein the step of said at least one secondary microcontroller monitoring power transferred to said at least one secondary coil comprises transmitting analogue signals to said secondary microcontroller.

3. The method of claim 1, wherein the step of said at least one secondary signal transmitter transmitting a regulation signal to said primary unit comprises transmitting a digital signal via said communication channel.

4. The method of claim 1, wherein said communication channel further transfers electromagnetic signals carrying data pertaining to power requirements of said load.

5. The method of claim 1, wherein said communication channel further transfers electromagnetic signals carrying data pertaining to required operating voltage for said electric load.

6. The method of claim 1, wherein said communication channel further transfers electromagnetic signals carrying data pertaining to required operating current for said electric load.

7. The method of claim 1, wherein said communication channel further transfers electromagnetic signals carrying data pertaining to required operating temperature for said electric load.

8. The method of claim 1, wherein said communication channel further transfers electromagnetic signals carrying data pertaining to measured operating voltage for said electric load.

9. The method of claim 1, wherein said communication channel further transfers electromagnetic signals carrying data pertaining to measured operating current for said electric load.

10. The method of claim 1, wherein said communication channel further transfers electromagnetic signals carrying data pertaining to measured operating temperature for said electric load.

11. The method of claim 1, wherein said communication channel further transfers electromagnetic signals carrying data pertaining to a user identification code.

12. The method of claim 1, wherein said communication channel further transfers electromagnetic signals carrying data pertaining to proximity of the secondary unit.

13. The method of claim 1 further comprising said secondary microcontroller monitoring at least one operating parameter of said electric load and encoding the monitored parameter data into said regulation signal.

14. A primary unit operable to transmit power wirelessly to a secondary unit operable to receive power wirelessly, said primary unit comprising:

at least one primary coil operable to transmit power to said secondary unit;

at least one driver comprising a switching unit and a high frequency oscillating voltage supply operable to provide a high frequency oscillating voltage across said at least one primary coil;

at least one primary signal receiver operable to receive electromagnetic signals selected from at least one regulation signal and at least one confirmation signal sent from said secondary unit thereby establishing a communication channel therebetween; and

at least one primary microcontroller comprising circuitry configured and operable to generate detection pulses, to activate said driver in response to said confirmation signals, and to regulate said driver according to said regulation signals.

15. The primary unit of claim 14, wherein said switching unit comprises a full-bridge power converter.

16. The primary unit of claim 14, wherein said switching unit comprises a half-bridge power converter.

17. A secondary unit operable to receive power wirelessly from a primary unit operable to transmit power wirelessly, said secondary unit comprising:

at least one secondary coil operable to receive power wirelessly from said primary unit;

at least one secondary signal transmitter operable to transmit electromagnetic signals selected from at least one regulation signal and at least one confirmation signal to said primary unit thereby establishing a communication channel therebetween;

at least one secondary microcontroller; and

at least one secondary microcontroller comprising circuitry configured and operable to generate a confirmation signal in response to a detection pulse received from said primary unit, to monitor power transferred to said at least one secondary coil, and to generate a regulation signal according to monitored power.

18. The secondary unit of claim 17 further comprising a conductive communication channel operable to transmit analogue signals to the secondary microcontroller for monitoring power transfer.

19. The secondary unit of claim 17 further comprising a load wired to said secondary coil and a conductive communication channel between said load and said secondary microcontroller.

20. The secondary unit of claim 17, wherein said secondary microcontroller further comprises a rectifier.