Wireless power transmission system
First Claim
Patent Images
1. A wireless power transmission system comprising:
- a power transmission device comprising;
an AC power generation circuit configured to generate AC currents;
a plurality of first circuits connected to the AC power generation circuit; and
a plurality of power transmission resonators each connected to different one of the plurality of first circuits and configured to generate magnetic fields based on the AC currents received through the plurality of first circuits; and
a power reception device comprising;
a plurality of power reception resonators configured to receive AC power through magnetic field coupling to the plurality of power transmission resonators;
a plurality of second circuits each connected to different one of the plurality of power reception resonators; and
a rectifier circuit connected to the plurality of second circuits and configured to convert voltages of the AC power received through the plurality of second circuits to DC voltages, wherein;
phases of the AC currents generated by the AC power generation circuit are shifted from each other,the plurality of first circuits each has a first ABCD-parameters including a parameter A, a parameter B, a parameter C and a parameter D, andthe plurality of second circuits each has a second ABCD-parameters including a parameter A, a parameter B, a parameter C and a parameter D, wherein;
the parameter A is an open-circuit output reverse voltage gain,the parameter B is a short-circuit output transfer impedance,the parameter C is an open output transfer admittance,the parameter D is a short-circuit output reverse current gain,an absolute value of the parameter A of the first ABCD-parameters of each of the plurality of first circuits is less than 1,an absolute value of the parameter D of the second ABCD-parameters of each of the plurality of second circuits is less than 1, anda difference of amplitudes of the AC currents in the power transmission resonators is suppressed even when a difference of coupling coefficients between the power transmission resonators and the power reception resonators varies.
1 Assignment
0 Petitions
Accused Products
Abstract
According to one embodiment, a wireless power transmission system includes: a power transmission device and a power reception device. The power transmission device includes an AC power generation circuit; first circuits connected to the AC power generation circuit; and power transmission resonators. The power reception device includes: power reception resonators, second circuits each connected to different one of the plurality of power reception resonators and a rectifier circuit. An absolute value of an open-circuit output reverse voltage gain in an F matrix of each of the plurality of first circuits is less than 1, and an absolute value of a short-circuit output reverse current gain in an F matrix of each of the plurality of second circuits is less than 1.
-
Citations
9 Claims
-
1. A wireless power transmission system comprising:
-
a power transmission device comprising; an AC power generation circuit configured to generate AC currents; a plurality of first circuits connected to the AC power generation circuit; and a plurality of power transmission resonators each connected to different one of the plurality of first circuits and configured to generate magnetic fields based on the AC currents received through the plurality of first circuits; and a power reception device comprising; a plurality of power reception resonators configured to receive AC power through magnetic field coupling to the plurality of power transmission resonators; a plurality of second circuits each connected to different one of the plurality of power reception resonators; and a rectifier circuit connected to the plurality of second circuits and configured to convert voltages of the AC power received through the plurality of second circuits to DC voltages, wherein; phases of the AC currents generated by the AC power generation circuit are shifted from each other, the plurality of first circuits each has a first ABCD-parameters including a parameter A, a parameter B, a parameter C and a parameter D, and the plurality of second circuits each has a second ABCD-parameters including a parameter A, a parameter B, a parameter C and a parameter D, wherein; the parameter A is an open-circuit output reverse voltage gain, the parameter B is a short-circuit output transfer impedance, the parameter C is an open output transfer admittance, the parameter D is a short-circuit output reverse current gain, an absolute value of the parameter A of the first ABCD-parameters of each of the plurality of first circuits is less than 1, an absolute value of the parameter D of the second ABCD-parameters of each of the plurality of second circuits is less than 1, and a difference of amplitudes of the AC currents in the power transmission resonators is suppressed even when a difference of coupling coefficients between the power transmission resonators and the power reception resonators varies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeKabushiki Kaisha Toshiba (Toshiba Corporation)
-
Original AssigneeKabushiki Kaisha Toshiba (Toshiba Corporation)
-
InventorsSuzuki, Masatoshi, Ishihara, Hiroaki
-
Primary Examiner(s)Kessie, Daniel
-
Assistant Examiner(s)Chowdhuri, Swarna N
-
Application NumberUS15/705,370Publication NumberTime in Patent Office865 DaysField of Search307104US Class CurrentCPC Class CodesH02J 50/12 of the resonant typeH02J 50/70 involving the reduction of ...H02J 7/00 Circuit arrangements for ch...
