NON-CONTACT TYPE POWER TRANSFER APPARATUS

• US 20170187240A1
• Filed: 07/08/2016
• Published: 06/29/2017
• Est. Priority Date: 12/23/2015
• Status: Active Grant

• Current Assignee: Wit Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: CHO, Sang Ho, KO, Tae Seok
• Granted Patent: US 10,170,941 B2
• Time in Patent Office: Days
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02M 7/53871 with automatic control of output voltage or current

Abstract

A non-contact type power transfer apparatus includes a power converter configured to convert input power into transmission power; a power transmitter configured to transmit the transmission power in a non-contact manner; and a controller configured to provide a power conversion control signal to control a power conversion operation of the power converter according to a state of the transmission power, and to output an input power control signal to control a power level of the input power according to the power conversion control signal.

Claims

1. A non-contact type power transfer apparatus comprising:

a power converter configured to convert input power into transmission power;

a power transmitter configured to transmit the transmission power in a non-contact manner; and

a controller configured to provide a power conversion control signal to control a power conversion operation of the power converter according to a state of the transmission power, and to output an input power control signal to control a power level of the input power according to the power conversion control signal.

2. The non-contact type power transfer apparatus of claim 1, further comprising a power supply configured to adjust the power level of the input power according to the input power control signal output from the controller and to supply the input power to the power converter.

3. The non-contact type power transfer apparatus of claim 2, wherein the controller is further configured to output the power conversion control signal to adjust at least one of a switching frequency of the power converter, a switching on/off duty ratio of the power converter, or combinations thereof;

and,

to output the input power control signal to adjust a switching on/off duty ratio of the power supply according to at least one of the switching frequency of the power converter, the switching on/off duty ratio of the power converter, or combinations thereof.

4. The non-contact type power transfer apparatus of claim 3, wherein the controller is further configured to calculate at least one of the switching frequency of the power converter, the switching on/off duty ratio of the power converter according to the power conversion control signal and a clock signal, or combinations thereof, and to output the input power control signal, adjusting the switching on/off duty ratio of the power supply depending on whether a result of the calculation is outside of a reference range.

5. The non-contact type power transfer apparatus of claim 2, wherein the controller is further configured to output the power conversion control signal to comprise a first gate signal and a second gate signal, and

to calculate switch on phases of the first gate signal and the second gate signal according to the power conversion control signal and a clock signal, and to output the input power control signal to adjust the switching on/off duty ratio of the power supply depending on whether a result of the calculation is outside of a reference range.

6. The non-contact type power transfer apparatus of claim 2, wherein the controller is further configured to employ the power conversion control signal as the input power control signal.

7. The non-contact type power transfer apparatus of claim 1, wherein the controller is further configured to transmit the input power control signal to an external variable adaptor supplying the input power to the power converter.

8. The non-contact type power transfer apparatus of claim 1, wherein the power converter comprises a full-bridge inverter or a half-bridge inverter.

9. A non-contact type power transfer apparatus comprising:

a power converter configured to convert input power into transmission power;

a power transmitter configured to transmit the transmission power in a non-contact type manner; and

a controller configured to adjust a power level of the input power in response to a state of a power conversion operation of the power converter being outside of a reference range.

10. The non-contact type power transfer apparatus of claim 9, further comprising a power supply configured to adjust the power level of the input power according to a control of the controller and to supply the varied power level of the input power to the power converter.

11. The non-contact type power transfer apparatus of claim 10, wherein the controller is further configured to adjust the power level of the input power in response to the state of the power conversion operation, the state of the power conversion operation comprising at least one of a switching frequency of the power converter, a switching on/off duty ratio of the power converter, or combinations thereof.

12. The non-contact type power transfer apparatus of claim 9, wherein the controller is further configured to adjust the power level of the input power depending on whether at least one of the switching frequency of the power converter, the switching on/off duty ratio of the power converter, or combinations thereof are outside of the reference range.

13. The non-contact type power transfer apparatus of claim 9, wherein the controller is further configured to provide a first gate signal and a second gate signal to the power converter to control the power conversion operation of the power converter, and

to adjust the power level of the input power depending on whether switch on phases of the first gate signal and the second gate signal are outside of the reference range.

14. The non-contact type power transfer apparatus of claim 9, wherein the controller is further configured to transmit the input power control signal to adjust the power level of the input power to an external variable adaptor supplying the input power to the power converter.

15. The non-contact type power transfer apparatus of claim 9, wherein the power converter comprises a full-bridge inverter or a half-bridge inverter.

16. A wireless power transfer apparatus, comprising:

a power supply configured to provide a variable power responsive to a supply signal;

a power converter coupled to the power supply, the power converter being configured to convert the variable power into a transmission power; and

,

a controller configured to adaptively adjust the variable power of the power supply and an operational characteristic of the power converter, or combinations thereof, in response to a calculation performed on the transmission power.

17. The wireless power transfer apparatus of claim 16, wherein the controller comprises a processor configured to continuously calculate a switching frequency of the power converter relative to a reference clock;

and, to adaptively adjust a duty ratio of the power converter in response to the calculated switching frequency to maintain the switching frequency within a predetermined range.

18. The wireless power transfer apparatus of claim 16, wherein:

the power converter comprises a switch; and

, the controller comprises a processor configured;

to generate a control signal for the switch of the power converter, to continuously calculate a duty ratio of the control signal output to the power converter, and

to adaptively adjust the duty ratio of the control signal in response to the calculated duty ratio.

19. The wireless power transfer apparatus of claim 16, wherein:

the power converter comprises two switches; and

,

the controller comprises a processor configured to generate two control signals respectively corresponding to the two switches for control thereof, to continuously calculate a phase difference between the control signals, and, to adaptively adjust a duty ratio of the switches in response to the calculated phase difference.