US 9,438,068 B2 · Wireless power feeder and wireless power feeding method

Abstract

A non-contact power feeder includes a plurality of power transmission coils disposed along a disposition surface, wherein a power receiving device that houses a power reception coil is disposed on the disposition surface, and a controller that determines a first traveling wave power, from among a plurality of traveling wave powers, that feeds the power transmission coil corresponding to the power receiving device based on a state of change of at least one of: actual transmitted power, from the plurality of traveling wave powers, transmitted from the plurality of power transmission coils to the power reception coil when power transmitted to the plurality of power transmission coils is changed, and reactive power, from the plurality of traveling wave powers, not transmitted from the power transmission coil to the power reception coil when the power transmitted to the plurality of power transmission coils is changed.

Claims18

Dependent claims

A wireless power feeder, comprising:

a power transmission coil that feeds power to a power reception coil provided with a power receiving device;
and
a controller that determines power transmitted to the power transmission coil based on a change of a slope of at least one of actual transmitted power and reactive power, wherein
the actual transmitted power is transmitted from the power transmission coil to the power reception coil, and
the reactive power is not transmitted from the power transmission coil to the power reception coil.

2 more elements

A wireless power feeding method for a wireless power feeder comprising a plurality of power transmission coils disposed along a disposition surface and a controller, a power receiving device that houses a power reception coil being disposed on the disposition surface, the method comprising:

changing, with the controller, a traveling wave power that is transmitted to the power transmission coils corresponding to the power receiving device;
and
determining, with the controller, a first traveling wave power, from the changed traveling wave power, based on a state of change of a change amount of at least one of actual transmitted power and reactive power relative to a changed amount of the changed traveling wave power,
feeding, with the controller, the determined first traveling wave power to a power transmission coil corresponding to the power receiving device, wherein
the actual transmitted power is transmitted from the plurality of power transmission coils to the power reception coil, and
the reactive power is not transmitted from the power transmission coil to the power reception coil.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

14/242,176Filed 1 Apr 2014

Priority

JP 2013-0779723 Apr 2013

Published

US 2014/0300315 A19 Oct 2014

Granted

6 Sep 2016

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

H02J 50/10
Circuit arrangements or systems for wireless supply or distribution of electric power: using inductive coupling
H02J 50/402
Using two or more transmitting or receiving devices: the two or more transmitting or the two or more receiving devices being integrated in the…
H02J 50/80
Circuit arrangements or systems for wireless supply or distribution of electric power: involving the exchange of data, concerning supply or…
H02J 50/90
Circuit arrangements or systems for wireless supply or distribution of electric power: involving detection or optimisation of position, e.g. alignment

Wireless power feeder and wireless power feeding method

Life of this patent

Wireless power feeder and wireless power feeding method

Life of this patent

Abstract

Claims18