WIRELESS POWER FEEDER, WIRELESS POWER RECEIVER, AND WIRELESS POWER TRANSMISSION SYSTEM
First Claim
Patent Images
1. A wireless power feeder which performs power feed by a non-contact method to a wireless power receiver having a power receive resonance circuit including a power receive coil and a power receive capacitor,the wireless power feeder comprising:
- a power feed coil;
a resonance current detector which detects a resonance current of the power receive resonance circuit; and
a control circuit which performs power feed from the power feed coil to the power receive coil, on the basis of a magnetic field resonance effect between the power feed coil and the power receive coil, by supplying AC current to the power feed coil, and which associates a frequency of the AC current with a frequency of the resonance current detected by the resonance current detector, whereinthe power feed coil does not substantially constitute a resonance circuit;
the resonance current detector has a detection resonance circuit which includes a detection coil and a detection capacitor, and detects a resonance current of the power receive resonance circuit on the basis of a magnetic field resonance effect between the detection coil and the power receive coil;
a winding region of the detection coil in the resonance current detector is smaller than a winding region of the power feed coil; and
the detection coil in the resonance current detector is disposed such that the central winding axis of the detection coil forms an angle of not less than 80° and
not more than 100°
with respect to magnetic field vectors generated by the power feed coil.
2 Assignments
0 Petitions
Accused Products
Abstract
A wireless power feeder which performs power feed to a wireless power receiver having a power receive resonance circuit including a power receive coil and a power receive capacitor, this wireless power feeder including: a power feed coil; a resonance current detector; and a control circuit; wherein the power feed coil does not substantially constitute a resonance circuit; the current detector has a detection resonance circuit including a detection coil and a detection capacitor, and detects a resonance current of the power receive resonance circuit; the winding region of the detection coil in the current detector is smaller than the winding region of the power feed coil; and the detection coil in the current detector is disposed such that the central winding axis thereof forms an angle of not less than 80° and not more than 100° with respect to magnetic field vectors generated by the power feed coil.
-
Citations
10 Claims
-
1. A wireless power feeder which performs power feed by a non-contact method to a wireless power receiver having a power receive resonance circuit including a power receive coil and a power receive capacitor,
the wireless power feeder comprising: -
a power feed coil; a resonance current detector which detects a resonance current of the power receive resonance circuit; and a control circuit which performs power feed from the power feed coil to the power receive coil, on the basis of a magnetic field resonance effect between the power feed coil and the power receive coil, by supplying AC current to the power feed coil, and which associates a frequency of the AC current with a frequency of the resonance current detected by the resonance current detector, wherein the power feed coil does not substantially constitute a resonance circuit; the resonance current detector has a detection resonance circuit which includes a detection coil and a detection capacitor, and detects a resonance current of the power receive resonance circuit on the basis of a magnetic field resonance effect between the detection coil and the power receive coil; a winding region of the detection coil in the resonance current detector is smaller than a winding region of the power feed coil; and the detection coil in the resonance current detector is disposed such that the central winding axis of the detection coil forms an angle of not less than 80° and
not more than 100°
with respect to magnetic field vectors generated by the power feed coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10)
-
-
8. A wireless power feeder which performs power feed by a non-contact method to a wireless power receiver having a power receive resonance circuit including a power receive coil and a power receive capacitor,
the wireless power feeder comprising: -
a power feed coil; a resonance current detector which detects a resonance current of the power receive resonance circuit; and a control circuit which performs power feed from the power feed coil to the power receive coil, on the basis of a magnetic field resonance effect between the power feed coil and the power receive coil, by supplying AC current to the power feed coil, and which associates a frequency of the AC current with a frequency of the resonance current detected by the resonance current detector, wherein the power feed coil does not substantially constitute a resonance circuit; the resonance current detector has a magnetic detection element and detects a resonance current of the power receive resonance circuit, on the basis of the magnetic field of the power receive coil; the outer shape of the magnetic detection element in the resonance current detector is smaller than a winding region of the power feed coil; and the magnetic detection element in the resonance current detector is disposed such that the magnetic detection direction forms an angle of not less than 80° and
not more than 100°
with respect to magnetic field vectors generated by the power feed coil.
-
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 AssigneeTDK Corporation
-
Original AssigneeTDK Corporation
-
InventorsURANO, Takashi
-
Granted Patent
-
Time in Patent OfficeDays
-
Field of Search
-
US Class Current307/104
-
CPC Class CodesH02J 50/12 of the resonant typeH02J 50/80 involving the exchange of d...H02J 50/90 involving detection or opti...
