Wireless power transmitter and method for wirelessly transmitting power
First Claim
1. A wireless power transmitter comprising:
- a converter comprising switching elements forming a bridge circuit, wherein the converter is configured to output an alternating current (AC) voltage comprising a frequency determined according to an operating frequency of at least one switching element among the switching elements;
a resonator comprising an inductor and a capacitor, and configured to receive the AC voltage to wirelessly transmit power; and
a controller configured to output control signals controlling the switching elements so thatthe converter performs a first mode operation in which an operating duty cycle is fixed and the operating frequency is varied, andan operation of the converter is switched from the first mode operation to a second mode operation in which the operating frequency is fixed and the operating duty cycle is varied, in response to the operating frequency reaching a first reference frequency,wherein the bridge circuit comprises half-bridge circuit comprising a first switch and a second switch connected to each other in series and alternately operated, andwherein the converter comprisesan inductor comprising a first inductor terminal connected to a first source terminal of an input power source, and a second inductor terminal connected to a connection terminal between the first and second switches, andan output capacitor comprising a first output capacitor terminal connected to one terminal of the half-bridge circuit, and a second output capacitor terminal connected to a second source terminal of the input power source and another terminal of the half-bridge circuit.
2 Assignments
0 Petitions
Accused Products
Abstract
A wireless power transmitter includes: a converter including switching elements forming a bridge circuit, wherein the converter is configured to output an alternating current (AC) voltage including a frequency determined according to an operating frequency of at least one switching element among the switching elements; a resonator including an inductor and a capacitor, and configured to receive the AC voltage to wirelessly transmit power; and a controller configured to output control signals controlling the switching elements so that the converter performs a first mode operation in which an operating duty cycle is fixed and the operating frequency is varied, and an operation of the converter is switched from the first mode operation to a second mode operation in which the operating frequency is fixed and the operating duty cycle is varied, in response to the operating frequency reaching a first reference frequency.
-
Citations
15 Claims
-
1. A wireless power transmitter comprising:
-
a converter comprising switching elements forming a bridge circuit, wherein the converter is configured to output an alternating current (AC) voltage comprising a frequency determined according to an operating frequency of at least one switching element among the switching elements; a resonator comprising an inductor and a capacitor, and configured to receive the AC voltage to wirelessly transmit power; and a controller configured to output control signals controlling the switching elements so that the converter performs a first mode operation in which an operating duty cycle is fixed and the operating frequency is varied, and an operation of the converter is switched from the first mode operation to a second mode operation in which the operating frequency is fixed and the operating duty cycle is varied, in response to the operating frequency reaching a first reference frequency, wherein the bridge circuit comprises half-bridge circuit comprising a first switch and a second switch connected to each other in series and alternately operated, and wherein the converter comprises an inductor comprising a first inductor terminal connected to a first source terminal of an input power source, and a second inductor terminal connected to a connection terminal between the first and second switches, and an output capacitor comprising a first output capacitor terminal connected to one terminal of the half-bridge circuit, and a second output capacitor terminal connected to a second source terminal of the input power source and another terminal of the half-bridge circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A wireless power transmitter comprising:
-
a converter comprising switching elements forming a bridge circuit, wherein the converter is configured to output alternating current (AC) voltage comprising an amplitude determined according to an operating duty cycle of at least one switching element among the switching elements, and a frequency determined according to an operating frequency of the at least one switching element; a resonator comprising an inductor and a capacitor, and configured to receive the AC voltage to wirelessly transmit power; and a controller configured to output control signals controlling the switching elements so that the converter performs one of a first mode operation in which the operating duty cycle is fixed and the operating frequency is varied, and a second mode operation in which the operating frequency is fixed and the operating duty cycle is varied, in response to a change in the operating frequency, wherein the bridge circuit comprises half-bridge circuit comprising a first switch and a second switch connected to each other in series and alternately operated, and wherein the converter comprises an inductor comprising a first inductor terminal connected to a first source terminal of an input power source, and a second inductor terminal connected to a connection terminal between the first and second switches, and an output capacitor comprising a first output capacitor terminal connected to one terminal of the half-bridge circuit, and a second output capacitor terminal connected to a second source terminal of the input power source and another terminal of the half-bridge circuit. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
-
Specification