RESONANCE-TYPE POWER TRANSMITTER

• US 20170279312A1
• Filed: 09/12/2014
• Published: 09/28/2017
• Est. Priority Date: 09/12/2014
• Status: Active Grant

• Current Assignee: Mitsubshi Electric Engineering Company Limited (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubshi Electric Engineering Company Limited (Mitsubishi Electric Corporation)
• Inventors: AKUZAWA, Yoshiyuki, SAKAI, Kiyohide, EZOE, Toshihiro, TSUJI, Kansuke
• Granted Patent: US 10,110,071 B2
• Time in Patent Office: Days
• CPC Class Codes: H02J 50/12 of the resonant type

Abstract

A configuration includes: resonance-type power source circuits provided for at least two electric paths, each including a power element that performs switching at a high frequency of 2 MHz or more, and a resonant circuit element that causes the power element to perform resonant switching; a phase-control-type matching circuits provided for the respective electric paths, each having a function of controlling a phase difference between output currents of the resonance-type power source circuits and a function of providing matching of resonance conditions between the resonance-type power source circuit and a load; and a combining unit that combines output currents processed by the phase-control-type matching circuits for the respective electric paths.

Claims

1. A resonance-type power transmitter comprising:

resonance-type power source circuits provided for at least two electric paths, each resonance-type power source circuit having two output ends for outputting an alternating current having a frequency of 2 MHz or more;

phase-control-type matching circuits connected to the respective resonance-type power source circuits, each phase-control-type matching circuit including an inductor that has one end being connected to one of the two output ends of a corresponding one of the resonance-type power source circuits, and a capacitor that has one end being connected to either the one end of the inductor or the other end of the inductor, the capacitor having the other end being connected to the other of the two output ends of the corresponding one of the resonance-type power source circuits; and

a combining unit connected to the other ends of the inductors of the phase-control-type matching circuits, configured to combine outputs of the phase-control-type matching circuits.

9. The resonance-type power transmitter according to claim 1, further comprising:

a detection circuit configured to detect a level of a composite output current obtained by the combining unit; and

an automatic matching control circuit configured to variably control transmission characteristics of the phase-control-type matching circuits provided for the respective electric paths on a basis of a result of the detection by the detection circuit.

10. The resonance-type power transmitter according to claim 1, further comprising:

a detection circuit configured to detect levels of currents as inputs to the resonance-type power source circuits provided for the respective electric paths; and

an automatic matching control circuit configured to variably control transmission characteristics of the phase-control-type matching circuits provided for the respective electric paths on a basis of a result of the detection by the detection circuit.

11. The resonance-type power transmitter according to claim 1, further comprising:

a detection circuit configured to detect levels of the output currents of the resonance-type power source circuits provided for the respective electric paths; and

an automatic matching control circuit configured to variably control transmission characteristics of the phase-control-type matching circuits provided for the respective electric paths on a basis of a result of the detection by the detection circuit.

12. The resonance-type power transmitter according to claim 1, further comprising:

a detection circuit configured to detect levels of output voltages of the resonance-type power source circuits provided for the respective electric paths; and

an automatic matching control circuit configured to variably control transmission characteristics of the phase-control-type matching circuits provided for the respective electric paths on a basis of a result of the detection by the detection circuit.

13. The resonance-type power transmitter according to claim 1, further comprising:

a detection circuit configured to detect levels of output currents of the phase-control-type matching circuits provided for the respective electric paths; and

an automatic matching control circuit configured to variably control transmission characteristics of the phase-control-type matching circuits provided for the respective electric paths on a basis of a result of the detection by the detection circuit.

2-8. -8. (canceled)