No Point of Contact Charging System
First Claim
1. A non-contact charging system having a battery pack (B) charged by an induced electromotive force generated from a non-contact charger (A) supplied with power, wherein the non-contact charger (A) comprises:
- an electromagnetic wave filter (100) connected to a power input terminal to block electromagnetic waves caused by Alternating Current (AC) power;
a primary rectification circuit (110) for rectifying the AC power, the electromagnetic waves of which are blocked, to Direct Current (DC) power;
a flyback converter (110′
) for storing power transferred from the primary rectification circuit (110) while a contained transistor is turned on, and applying an input voltage to a gate driver (160), a central processing unit (180) and an ion generation unit (182) and applying a driving voltage to a series resonance type converter (120) when the contained transistor is turned off;
a current detection unit (170) interposed between the flyback converter (110′
) and the series resonance type converter (120) to detect variation in current resulting from approach of the battery pack (B), and outputting a comparison current depending on variation in current;
a central processing unit (180) for detecting the approach of the battery pack (B) using the comparison current input from the current detection unit (170), controlling the gate drive (160) according not only to whether the battery pack (B) approaches but also to the current of a temperature protection circuit unit (183) to stop the switching of the gate drive (160) when abnormal operation occurs or the temperature of a foreign object placed on the non-contact charging pad exceeds a predetermined temperature;
a gate driver (160) for outputting gate signals under the control of the central processing unit (180);
the series resonance type converter (120) for adjusting the waveforms of voltage and current applied to a primary core unit (130) in response to the gate signals input from the gate driver (160); and
the primary core unit (130) switched by the series resonance type converter (120) to generate the induced electromotive force.
2 Assignments
0 Petitions
Accused Products
Abstract
Disclosed herein is a non-contact charging system. The non-contact charging system detects a portable terminal, a battery pack or a foreign object that is placed on the pad of a non-contact charger, and effectively monitors and controls its charging state through the detection, thus preventing such a foreign object placed on the pad from being heated by induction heating, and further causes anions to be generated during the charging of the portable terminal or the battery pack, thus sterilizing bacteria on a terminal and keeping ambient air thereof fresh.
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Citations
11 Claims
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1. A non-contact charging system having a battery pack (B) charged by an induced electromotive force generated from a non-contact charger (A) supplied with power, wherein the non-contact charger (A) comprises:
- an electromagnetic wave filter (100) connected to a power input terminal to block electromagnetic waves caused by Alternating Current (AC) power;
a primary rectification circuit (110) for rectifying the AC power, the electromagnetic waves of which are blocked, to Direct Current (DC) power;
a flyback converter (110′
) for storing power transferred from the primary rectification circuit (110) while a contained transistor is turned on, and applying an input voltage to a gate driver (160), a central processing unit (180) and an ion generation unit (182) and applying a driving voltage to a series resonance type converter (120) when the contained transistor is turned off;
a current detection unit (170) interposed between the flyback converter (110′
) and the series resonance type converter (120) to detect variation in current resulting from approach of the battery pack (B), and outputting a comparison current depending on variation in current;
a central processing unit (180) for detecting the approach of the battery pack (B) using the comparison current input from the current detection unit (170), controlling the gate drive (160) according not only to whether the battery pack (B) approaches but also to the current of a temperature protection circuit unit (183) to stop the switching of the gate drive (160) when abnormal operation occurs or the temperature of a foreign object placed on the non-contact charging pad exceeds a predetermined temperature;
a gate driver (160) for outputting gate signals under the control of the central processing unit (180);
the series resonance type converter (120) for adjusting the waveforms of voltage and current applied to a primary core unit (130) in response to the gate signals input from the gate driver (160); and
the primary core unit (130) switched by the series resonance type converter (120) to generate the induced electromotive force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- an electromagnetic wave filter (100) connected to a power input terminal to block electromagnetic waves caused by Alternating Current (AC) power;
Specification