A power supply device for a high frequency soldering iron

The present invention relates to a power supply device for a high frequency soldering iron comprising a main body, a soldering iron tip, and a heat generation unit. The power supply device for a high frequency soldering iron comprises: a power assembly for receiving an alternating current power source to convert the same into a direct current power source; an FET switching unit for generating a switching signal; a high frequency switching transformer for converting a voltage of a pulsed alternating current power source generated by the switching signal; an induction coil installed in the soldering iron, induced by output of the high frequency switching transformer to generate an eddy current, and heating the heat generation unit by the eddy current; a first internal temperature sensor attached to the FET switching unit to measure a temperature (hereinafter, a first internal temperature); a second internal temperature sensor attached to the high frequency switching transformer to measure a temperature (hereinafter, a second internal temperature); a third internal temperature sensor provided on the heat generation unit to sense heat (hereinafter, a third internal temperature) generated in the heat generation unit; an ambient temperature sensor for measuring an ambient temperature of the soldering iron; and a control unit for controlling the FET switching unit to be turned off if the first and second internal temperatures become equal to or higher than a predetermined reference temperature, and adjusting a switching frequency of the FET switching unit by using the third internal temperature and the ambient temperature. According to the power supply device of the present invention, a switching period is adjusted depending on a difference range of an internal temperature of the soldering iron tip and an ambient temperature so as to compensate for different times of transition of the tip to a paramagnetic body depending on an external temperature or an ambient temperature. Therefore, it is possible to always heat the soldering tip to an appropriate temperature and to prevent an object to be soldered from being damaged by excessive temperature transition. 본 발명은 본체, 인두기 팁, 및, 발열부를 포함하여 구성되는 고주파 인두기의 전원 공급 장치에 관한 것으로, 교류전원을 입력받아 직류전원으로 변환하는 파워 어셈블리; 스위칭 신호를 생성하는 FET 스위칭부; 스위칭 신호에 의해 발생되는 펄스 형태의 교류전원의 전압을 변환하는 고주파 스위칭 변압기; 상기 인두기 내에 설치되고, 상기 고주파 스위칭 변압기의 출력에 의하여 유도되어 와전류를 발생시키고, 상기 와전류에 의해 발열부를 가열하는 유도 코일; 상기 FET 스위칭부에 부착되어 온도(이하 제1 내부온도)를 측정하는 제1 내부온도 센서; 상기 고주파 스위