Power receiver and power transmitting system
First Claim
1. A power receiver comprising:
- a first secondary-side resonant coil, including a resonant coil part, a first terminal and a second terminal, that receives electric power from a primary-side resonant coil through magnetic field resonance generated between the primary-side resonant coil and the first secondary-side resonant coil, the first terminal and the second terminal being respectively provided on both ends of the resonant coil part;
a capacitor inserted in series with the resonant coil part of the first secondary-side resonant coil;
a rectifier circuit, coupled to the first terminal and the second terminal, that rectifies alternating-current power input from the first secondary-side resonant coil;
a smoothing circuit coupled to an output side of the rectifier circuit;
a pair of output terminals coupled to an output side of the smoothing circuit;
a switch coupled in parallel to the capacitor or coupled in series between the rectifier circuit and one of the first terminal and the second terminal of the first secondary-side resonant coil; and
a drive controller that drives the switch through a first PWM drive pattern determined by a first duty cycle and by a first frequency that is less than or equal to a frequency of the magnetic field resonance, the first duty cycle being set based on a first efficiency of electric power reception of the first secondary-side resonant coil, a first rated output of a first load coupled to the pair of output terminals, a second efficiency of electric power reception of a second secondary-side resonant coil of another power receiver that receives electric power from the primary-side resonant coil through magnetic field resonance generated between the primary-side resonant coil and the second secondary-side resonant coil, and a second rated output of a second load to which the electric power is supplied from the other power receiver.
1 Assignment
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Accused Products
Abstract
A power receiver includes: a first secondary-side resonant coil that receives electric power from a primary-side resonant coil through magnetic field resonance; a capacitor; a smoothing circuit; a pair of output terminals; a switch coupled in parallel to the capacitor or in series between a rectifier circuit and either a first terminal or a second terminal; and a drive controller that drives the switch through a first PWM drive pattern determined by a first duty cycle and by a first frequency that is less than or equal to a frequency of the magnetic field resonance. The first duty cycle is set based on a first efficiency of power reception of the first secondary-side resonant coil, a first rated output of a first load, a second efficiency of power reception of a second secondary-side resonant coil of another power receiver, and a second rated output of a second load.
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Citations
12 Claims
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1. A power receiver comprising:
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a first secondary-side resonant coil, including a resonant coil part, a first terminal and a second terminal, that receives electric power from a primary-side resonant coil through magnetic field resonance generated between the primary-side resonant coil and the first secondary-side resonant coil, the first terminal and the second terminal being respectively provided on both ends of the resonant coil part; a capacitor inserted in series with the resonant coil part of the first secondary-side resonant coil; a rectifier circuit, coupled to the first terminal and the second terminal, that rectifies alternating-current power input from the first secondary-side resonant coil; a smoothing circuit coupled to an output side of the rectifier circuit; a pair of output terminals coupled to an output side of the smoothing circuit; a switch coupled in parallel to the capacitor or coupled in series between the rectifier circuit and one of the first terminal and the second terminal of the first secondary-side resonant coil; and a drive controller that drives the switch through a first PWM drive pattern determined by a first duty cycle and by a first frequency that is less than or equal to a frequency of the magnetic field resonance, the first duty cycle being set based on a first efficiency of electric power reception of the first secondary-side resonant coil, a first rated output of a first load coupled to the pair of output terminals, a second efficiency of electric power reception of a second secondary-side resonant coil of another power receiver that receives electric power from the primary-side resonant coil through magnetic field resonance generated between the primary-side resonant coil and the second secondary-side resonant coil, and a second rated output of a second load to which the electric power is supplied from the other power receiver. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A power transmitting system comprising:
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a first power receiver; a second power receiver; and a power transmitter including a primary-side resonant coil, wherein the first power receiver includes a first secondary-side resonant coil, including a resonant coil part, a first terminal and a second terminal, that receives electric power from the primary-side resonant coil through magnetic field resonance generated between the primary-side resonant coil and the first secondary-side resonant coil, the first terminal and the second terminal being respectively provided on both ends of the resonant coil part; a capacitor inserted in series with the resonant coil part of the first secondary-side resonant coil; a rectifier circuit, coupled to the first terminal and the second terminal, that rectifies alternating-current power input from the first secondary-side resonant coil; a smoothing circuit coupled to an output side of the rectifier circuit; a pair of output terminals coupled to an output side of the smoothing circuit; a switch coupled in parallel to the capacitor or coupled in series between the rectifier circuit and one of the first terminal and the second terminal of the first secondary-side resonant coil; and a drive controller that drives the switch through a first PWM drive pattern determined by a first duty cycle and by a first frequency that is less than or equal to a frequency of the magnetic field resonance, the first duty cycle being set based on a first efficiency of electric power reception of the first secondary-side resonant coil, a first rated output of a first load coupled to the pair of output terminals, a second efficiency of electric power reception of a second secondary-side resonant coil of the second power receiver that receives electric power from the primary-side resonant coil through magnetic field resonance generated between the primary-side resonant coil and the second secondary-side resonant coil, and a second rated output of a second load to which the electric power is supplied from the second power receiver. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification