Non-Contact Power Transmission Apparatus
First Claim
1. A non-contact power transmission apparatus comprising:
- a primary core wirelessly sending out a wireless power signal to a non-contact power receiving apparatus having a secondary core, wherein the apparatus is operated such that, when the apparatus detects a change in a load of the primary core, the apparatus measures a delay time from an output time of an asking signal, asking what an object on the non-contact power transmission apparatus is, to a time of receipt of a response signal corresponding to the asking signal, the signals being transmitted via the primary core, compares the measured delay time with a reference standby time, and if the measured time is shorter than the reference standby time, determines that the object is a foreign substance, and if the measured time is longer than the reference standby time, determines that the object is a normal non-contact power receiving apparatus, and sends out the wireless power signal.
3 Assignments
0 Petitions
Accused Products
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.
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Citations
15 Claims
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1. A non-contact power transmission apparatus comprising:
a primary core wirelessly sending out a wireless power signal to a non-contact power receiving apparatus having a secondary core, wherein the apparatus is operated such that, when the apparatus detects a change in a load of the primary core, the apparatus measures a delay time from an output time of an asking signal, asking what an object on the non-contact power transmission apparatus is, to a time of receipt of a response signal corresponding to the asking signal, the signals being transmitted via the primary core, compares the measured delay time with a reference standby time, and if the measured time is shorter than the reference standby time, determines that the object is a foreign substance, and if the measured time is longer than the reference standby time, determines that the object is a normal non-contact power receiving apparatus, and sends out the wireless power signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A non-contact power transmission apparatus comprising a transmission module having a primary core wirelessly sending out a wireless power signal to a non-contact power receiving apparatus having a secondary core, wherein the transmission module includes:
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a body case; a board provided in the body case and having a control module for sending out the wireless power signal;
a shielding plate provided on an upper portion of the board;
first and second power transmission core sides provided on an upper portion of the shielding plate such that they are electrically connected with the control module, the first and second power transmission core sides partially overlapping each other;
a light-emitting device for displaying the charging state provided on a side of the body case such that it is electrically connected with the control module; anda cover coupled to the body case and on which the non-contact power receiving apparatus is placed. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification