US 8,552,593 B2 · Non-contact power transmission apparatus

Abstract

A non-contact power transmission apparatus accurately determines the kind of object that is placed on the charging deck of the non-contact power transmission apparatus, and, only when a non-contact power receiving apparatus is placed on the power transmission apparatus, allows power transmission and data communication to take place, thereby accurately determining the state of the receiver side and efficiently controlling the transmission of power. In the power transmission apparatus, the power supplied to the non-contact power receiving apparatus is measured, and the output power of the wireless power signal output from two different cores is controlled, thereby allowing the charging operation to be stably conducted even if the non-contact power receiving apparatus is moved anywhere on the power transmission apparatus. The power transmission apparatus improves both the reliability of operation of the non-contact charging system, and the competitiveness of related products, such as portable terminals, battery packs and the like.

Claims21

Dependent claims

A method for controlling a power transmission in a non-contact power transmission device, the method comprising:

detecting a load change of a primary core in the non-contact power transmission apparatus when an object is placed on the non-contact power transmission apparatus;
transmitting a requesting signal to the object via the primary core if a load change is detected;
receiving a response signal via the primary core in response to the requesting signal and measuring a delay time between the time of outputting the requesting signal and the time of receiving the response signal;
confirming whether the object is a non-contact power receiving apparatus by comparing the delay time with a reference time;
receiving a pulse signal according to the comparison result of the non-contact power signal and a reference voltage, the non-contact power signal being transmitted from the non-contact power receiving apparatus;
and
controlling an intensity of the non-contact power signal according to the pulse signal.

4 more elements

A non-contact power transmission apparatus comprising:

a primary core configured to transmit a non-contact power transmission signal and an ID requesting signal;
an ID identifier configured to detect a load change of the primary core, the load change being generated when an object is placed on or near the primary core;
and
a power transmission controller configured to transmit a requesting signal to the object via the primary core due to being placed on if the load change is detected by the ID identifier, to receive a response signal generated in response to the requesting signal via the primary core, to measure a delay time between the transmission timing of the requesting signal and the receiving timing of the response signal, and to confirm whether the object is a non-contact power receiving apparatus by comparing the delay time with a reference time, to receive a pulse signal according to the comparison result of the non-contact power signal and a reference voltage, the non-contact power signal being transmitted from the non-contact power receiving apparatus;
and to control an intensity of the non-contact power signal according to the pulse signal.

2 more elements

Dependencies are inferred from the claim text.

Non-contact power transmission apparatus

Life of this patent

Non-contact power transmission apparatus

Life of this patent

Abstract

Claims21