Wireless power transmitter circuit and control circuit and control method thereof
First Claim
1. A wireless power transmitter circuit, comprising:
- a power inverter circuit which includes at least a first switching device, and is configured to operably convert a first DC power to an AC output power, wherein the AC output power includes an AC output current;
a resonant transmitter circuit which includes at least a transmitter coil and a variable capacitor circuit, and is configured to operably convert the AC output power to a resonant wireless power, wherein the resonant wireless power includes a resonant current; and
a control circuit, configured to operably generate an impedance control signal according to a difference between a current reference signal and a resonant current related signal, for controlling an impedance of the variable capacitor circuit to regulate the resonant current or the AC output current substantially at a predetermined current level, wherein the resonant current related signal is a signal related to the resonant current.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless power transmitter circuit includes a power inverter circuit, a resonant transmitter circuit and a control circuit. The power inverter circuit converts a DC power to an AC output power which includes an AC output current. The resonant transmitter circuit, including a variable capacitor circuit, converts the AC output power to a resonant wireless power which includes a resonant current. The control circuit generates an impedance control signal according to a resonant current related signal and a current reference signal, for controlling the impedance of the variable capacitor circuit to regulate the resonant current or the AC output current substantially at a predetermined current level.
-
Citations
22 Claims
-
1. A wireless power transmitter circuit, comprising:
-
a power inverter circuit which includes at least a first switching device, and is configured to operably convert a first DC power to an AC output power, wherein the AC output power includes an AC output current; a resonant transmitter circuit which includes at least a transmitter coil and a variable capacitor circuit, and is configured to operably convert the AC output power to a resonant wireless power, wherein the resonant wireless power includes a resonant current; and a control circuit, configured to operably generate an impedance control signal according to a difference between a current reference signal and a resonant current related signal, for controlling an impedance of the variable capacitor circuit to regulate the resonant current or the AC output current substantially at a predetermined current level, wherein the resonant current related signal is a signal related to the resonant current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A control circuit, configured to operably control a wireless power transmitter circuit which comprises:
- a power inverter circuit including at least a first switching device, and being configured to operably convert a first DC power to an AC output power, wherein the AC output power includes an AC output current; and
a resonant transmitter circuit which includes at least a transmitter coil and a variable capacitor circuit, and is configured to operably convert the AC output power to a resonant wireless power, wherein the resonant wireless power includes a resonant current;
the control circuit comprises;a current signal processing circuit, configured to operably generate a difference signal according to a current reference signal and a resonant current related signal, wherein the resonant current related signal is a signal related to the resonant current; and a signal conversion circuit, configured to operably generate an impedance control signal according to the difference signal, for controlling the impedance of the variable capacitor circuit to regulate the resonant current or the AC output current substantially at a predetermined current level. - View Dependent Claims (11, 12, 13, 14, 15, 16)
- a power inverter circuit including at least a first switching device, and being configured to operably convert a first DC power to an AC output power, wherein the AC output power includes an AC output current; and
-
17. A method for use in controlling a wireless power transmitter circuit which comprises:
- a power inverter circuit including at least a first switching device, and being configured to operably convert a first DC power to an AC output power, wherein the AC output power includes an AC output current; and
a resonant transmitter circuit which includes at least a transmitter coil and a variable capacitor circuit, and is configured to operably convert the AC output power to a resonant wireless power, wherein the resonant wireless power includes a resonant current, the method comprising;generating a difference signal according to a current reference signal and a resonant current related signal, wherein the resonant current related signal is a signal related to the resonant current; and generating an impedance control signal according to the difference signal, for controlling the impedance of the variable capacitor circuit to regulate the resonant current or the AC output current substantially at a predetermined current level. - View Dependent Claims (18, 19, 20, 21, 22)
- a power inverter circuit including at least a first switching device, and being configured to operably convert a first DC power to an AC output power, wherein the AC output power includes an AC output current; and
Specification