| US 7,451,012 B2 | ||
| Fault electric arc protection circuits and method for detecting fault electric arc | ||
| Xin Wang, Guangdong (China); and Qianjun Shen, Guangdong (China) | ||
| Assigned to Gree Electric Applicances Inc. of Zhuhai, Guangdong (China) | ||
| Filed on Feb. 21, 2007, as Appl. No. 11/709,064. | ||
| Prior Publication US 2008/0201021 A1, Aug. 21, 2008 | ||
| Int. Cl. G06F 19/00 (2006.01) | ||
| U.S. Cl. 700—162 | 8 Claims |
| 1. A fault electric arc protection circuits system comprising a power source, wherein the circuits system comprising:
signal sample device for sampling current signals simultaneously, and output the sampled signals;
signal processing module for processing the sampled signals, and output processed results;
arc detecting control device for receiving the processed results from the signal processing module, and detecting the results
and determining whether to output control signals or not; and
power supply cutting off module for cutting off the power supply according to the control signals from the arc detecting control
device,
wherein said signal sampling device comprising a matching resistor and a current transformer without iron core: said signal
processing module comprising a rectifying tube and a voltage divider; said arc detecting control device is a single chip micyoco;
said power cut-off module comprising a set of audion that orderly connected, and an actuator portion; one end of the current
transformer is grounded and an other end is connected with the rectifying tube thus to connect to the single chip micyoco;
the matching resistor is coordinately connected between the rectifying tube and the current transformer, and the voltage divider
is coordinately connected between the rectifying tube and the single chip micyoco.
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