Chan Gi
Chan Gi Kim, Cheongju-City KR
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20110270541 | AIR FLOW RATE SENSOR - Disclosed is an air flow rate sensor capable of sensing an air flow rate and respirator air flow rate. The air flow rate sensor includes a chamber having left and right portions having same internal diameters and a central portion having an internal diameter greater than the internal diameters of the left and right portions, first and second pressure taps provided at the left and right portions of the chamber, respectively, and a pressure sensor connected to the first and second pressure taps to measure a differential pressure between the left and right portions of the chamber. There are obstacles on the path of air flow, so that exact and uniform measurement characteristics are maintained. Since energy loss is measured by using vortex, the structure of the air flow rate sensor is simplified. The air flow rate sensor is used as a respirator air flow rate sensor. | 11-03-2011 |
Chan Gi Park, Gyeonggi-Do KR
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20130322137 | POWER FACTOR CORRECTION CIRCUIT - Disclosed is a power factor correction circuit. The power factor correction circuit according to an exemplary embodiment of the present disclosure includes an electrolyte capacitor and a film capacitor, where ripple burden of the electrolyte capacitor is lessened to reduce the capacity of the condenser and to lengthen the life. | 12-05-2013 |
Chan Gi Park, Yangpyeong-Gun KR
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20130193922 | APPARATUS FOR DISCHARGING DC-LINK CAPACITOR FOR ELECTRIC VEHICLE CHARGER - An exemplary embodiment of the present disclosure includes an apparatus for discharging DC-link capacitor for electric vehicle charger. In a case the apparatus operates abnormally, operations of a rectifier, a boost PFC circuit and a DC-DC converter are discontinued, and the apparatus receives the power source charged in the DC-link capacitor through the auxiliary power supply unit to thereby perform a control operation. | 08-01-2013 |
Chan Gi Park, Anyang-Si KR
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20150062986 | POWER FACTOR CORRECTION CIRCUIT - Provided is a power factor correction circuit correcting a power factor of AC voltage. The power factor correction circuit includes: a rectifying unit stopping rectifying the AC voltage in a transient state and generating an rectified voltage by rectifying the AC voltage in a steady state; a power factor correction unit generating a power-factor-corrected voltage by correcting the rectified voltage; a smoothing unit generating a smoothed voltage by smoothing the power-factor-corrected voltage; and an inrush current limiting unit providing a limited current by limiting an inrush current generated by the AC voltage in the transient state and stopping providing a current to the smoothing unit. | 03-05-2015 |
20150063401 | TEMPERATURE MEASUREMENT APPARATUS USING NEGATIVE TEMPERATURE COEFFICIENT THERMISTOR - Provided is a temperature measurement apparatus using a negative temperature coefficient (NTC) thermistor. A temperature sensor includes the NTC thermistor and a variable resistor part. A resistance value of the variable resistor part varies between a default resistance value for measuring a temperature and a temporary resistance value for determining a disconnection. An abnormal operation determination unit determines whether the NTC thermistor is disconnected, based on an output voltage of the temperature sensor when the variable resistor part has the temporary resistance value. | 03-05-2015 |
20150063421 | TEMPERATURE MEASUREMENT APPARATUS USING NEGATIVE TEMPERATURE COEFFICIENT THERMISTER - A temperature measurement apparatus using a negative temperature coefficient (NTC) thermister is provided. A temperature sensor includes the NTC thermister and a variable resistor part, in which a resistance value of the variable resistor part varies between a first resistance value for a first output voltage value and a second resistance value for a second output voltage value to allow a voltage value corresponding to a present temperature to be outputted. A voltage temperature matching unit outputs the present temperature based on the first output voltage value and the second output voltage value. | 03-05-2015 |