KR970013614A - Resonant Current Sensing Device for Voltage Resonant Inverter Circuit - Google Patents

Resonant Current Sensing Device for Voltage Resonant Inverter Circuit Download PDF

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Publication number
KR970013614A
KR970013614A KR1019950026377A KR19950026377A KR970013614A KR 970013614 A KR970013614 A KR 970013614A KR 1019950026377 A KR1019950026377 A KR 1019950026377A KR 19950026377 A KR19950026377 A KR 19950026377A KR 970013614 A KR970013614 A KR 970013614A
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KR
South Korea
Prior art keywords
voltage
power transistor
current sensing
resonant
sensing device
Prior art date
Application number
KR1019950026377A
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Korean (ko)
Inventor
김종록
Original Assignee
구자홍
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 구자홍, 엘지전자 주식회사 filed Critical 구자홍
Priority to KR1019950026377A priority Critical patent/KR970013614A/en
Publication of KR970013614A publication Critical patent/KR970013614A/en

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  • Inverter Devices (AREA)
  • Protection Of Static Devices (AREA)

Abstract

본 발명은 전압공진형 인버터회로에 관한 것으로, 특히 순간정전이나 써지(Surge)가 발생하였을 경우에 공진전압이 급격히 증가함으로 인한 파워트랜지스터의 파괴를 막을 수 있는 전압공진형 인버터회로의 공진전류감지장치에 관한 것으로, 일반적으로 순간적인 정전이나 써지에 의하여 급작한 공진전압의 상승에 의하여 파워트랜지스터의 파괴가 우려되고, 이를 방지하기 위하여 내전압이 높은 파워트랜지스터를 사용하는 경우에는 그에따른 가격상승의 요인이 되는 문제점이 있었으나, 본 발명에서는 공진전류가 상승하게 되면 이를 감지하여 파워트랜지스터의 베이스에 인가되는 펄스를 소정시간 차단함으로써, 파워트랜지스터의 파괴를 막을 수 있을 뿐만아니라 내전압이 낮은 파워트랜지스터를 사용할 수 있으므로 가격절감의 효과가 있게된다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voltage resonant inverter circuit. In particular, a resonant current sensing device of a voltage resonant inverter circuit capable of preventing destruction of a power transistor due to a sudden increase in resonance voltage in the event of a momentary power failure or surge. In general, there is a concern that the power transistor may be destroyed due to a sudden resonance voltage increase due to a momentary power failure or surge, and in the case of using a power transistor having a high withstand voltage to prevent this, However, in the present invention, when the resonance current is increased, the present invention senses this and blocks the pulse applied to the base of the power transistor for a predetermined time, thereby preventing the destruction of the power transistor and using a power transistor having a low withstand voltage. Price savings are effective.

Description

전압공진형 인버터회로의 공진전류감지장치Resonant Current Sensing Device for Voltage Resonant Inverter Circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 일반적인 전압공진형 인버터회로를 나타낸 도,1 is a view showing a general voltage resonance inverter circuit;

제2도는 본 발명 전압공진형 인버터회로의 공진전류감지 장치를 나타낸 도.2 is a view showing a resonance current detecting device of the voltage resonant inverter circuit of the present invention.

Claims (4)

파워트랜지스터에 흐르는 공진전류를 감지하는 공진전류감지부와, 상기 공진전류감지부에서 감지된 공진전류를 기준전압과 비교하여 그에따른 신호를 출력하는 비교판단부와, 상기 비교판단부의 출력에 따라 스위칭하는 스위칭부와, 상기 스위칭부의 출력에 따라 상기 파워트랜지스터의 베이스에 인가되는 펄스의 차단여부를 결정하는 펄스차단부로 구성하여 된 것을 특징으로 하는 전압공진형 인버터회로의 공진전류감지장치.A resonance current sensing unit for sensing a resonance current flowing through a power transistor, a comparison determination unit for comparing the resonance current sensed by the resonance current sensing unit with a reference voltage, and outputting a signal according to the reference voltage, and switching according to the output of the comparison determination unit And a pulse blocking unit for determining whether or not to block a pulse applied to the base of the power transistor according to the output of the switching unit. 제1항에 있어서, 펄스차단부는 파원트랜지스터의 베이스에 인가되는 펄스를 차단한 다음 소정시간 경과 후 정상적인 펄스를 다시 공급할 수 있게 하는 것을 특징으로 하는 전압공진형 인버터회로의 공진전류감지장치.The resonant current sensing device of claim 1, wherein the pulse blocking unit blocks the pulse applied to the base of the wave transistor and supplies the normal pulse again after a predetermined time elapses. 제1항에 있어서, 공진전류 감지부는 공진전류가 흐르는 라인에 저항 어레이를 직렬로 연결하여 저항 양단에 걸리는 전압으로 공진전류의 크기를 감지하는 것을 특징으로 하는 전압공진형 인버터회로의 공진전류감지장치.The resonant current sensing device of claim 1, wherein the resonant current sensing unit senses the magnitude of the resonant current by a voltage across the resistor by connecting a resistor array in series to a line through which the resonant current flows. . 제3항에 있어서, 저항 어레이는 하나 혹은 복수개의 저항들이 병렬로 연결되어 이루어진 것을 특징으로 하는 전압공진형 인버터회로의 공진전류감지장치.The apparatus of claim 3, wherein the resistor array comprises one or a plurality of resistors connected in parallel. 5. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950026377A 1995-08-24 1995-08-24 Resonant Current Sensing Device for Voltage Resonant Inverter Circuit KR970013614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950026377A KR970013614A (en) 1995-08-24 1995-08-24 Resonant Current Sensing Device for Voltage Resonant Inverter Circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950026377A KR970013614A (en) 1995-08-24 1995-08-24 Resonant Current Sensing Device for Voltage Resonant Inverter Circuit

Publications (1)

Publication Number Publication Date
KR970013614A true KR970013614A (en) 1997-03-29

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Application Number Title Priority Date Filing Date
KR1019950026377A KR970013614A (en) 1995-08-24 1995-08-24 Resonant Current Sensing Device for Voltage Resonant Inverter Circuit

Country Status (1)

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KR (1) KR970013614A (en)

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