KR880000768Y1 - Power circuit - Google Patents

Power circuit

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Publication number
KR880000768Y1
KR880000768Y1 KR2019840001164U KR840001164U KR880000768Y1 KR 880000768 Y1 KR880000768 Y1 KR 880000768Y1 KR 2019840001164 U KR2019840001164 U KR 2019840001164U KR 840001164 U KR840001164 U KR 840001164U KR 880000768 Y1 KR880000768 Y1 KR 880000768Y1
Authority
KR
South Korea
Prior art keywords
transistor
capacitor
microcomputer
power
collector
Prior art date
Application number
KR2019840001164U
Other languages
Korean (ko)
Other versions
KR850007209U (en
Inventor
이영철
Original Assignee
삼성전자 주식회사
정재은
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 삼성전자 주식회사, 정재은 filed Critical 삼성전자 주식회사
Priority to KR2019840001164U priority Critical patent/KR880000768Y1/en
Publication of KR850007209U publication Critical patent/KR850007209U/en
Application granted granted Critical
Publication of KR880000768Y1 publication Critical patent/KR880000768Y1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/002—Error detection; Error correction; Monitoring protecting against parasitic influences, e.g. noise, temperatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)
  • Electronic Switches (AREA)

Abstract

내용 없음.No content.

Description

마이콤의 순간 정전시 오동작 방지회로Malfunction prevention circuit during momentary power failure of micom

제1도는 본 고안의 회로도.1 is a circuit diagram of the present invention.

제2도는 순간 정전시 본 고안의 특성도.2 is a characteristic diagram of the present invention at the moment of power failure.

본 고안은 마이콤의 동작으로 제어되는 컴퓨터 선풍기 등에 있어서 순간 정전시 발생될 우려가 있는 마이콤의 오동작을 방지하므로서 기기의 모든 동작이 정확히 제어될 수 있도록 한 마이콤의 순간 정전시 오동작 방지회로에 관한 것이다.The present invention relates to a malfunction prevention circuit during a momentary power failure of a microcomputer to prevent the malfunction of the microcomputer that may be generated during a momentary power failure in a computer fan controlled by the operation of the microcomputer, so that all operations of the device can be accurately controlled.

통상 마이콤을 동작시키기 위한 입력전원에는 정전압 회로를 통한 일정직류전압이 인가되는 것인데, 마이콤의 동작도중 정전이 되었다가 다시 전원이 복귀되는 경우, 그 정전시간이 극히 짧다면 정전이 되었음에도 불구하고 마이콤의 리세트 되지 않으므로 전원이 복귀될시에 마이콤은 오동작을 유발하여 모든 제어동작이 정확히 수행되지 못하는 결점이 있었다.In general, a constant DC voltage through a constant voltage circuit is applied to an input power source for operating a microcomputer.If the power supply is restored after a power failure during the operation of the microcomputer, if the power failure time is extremely short, Since it is not reset, when the power is restored, the microcomputer malfunctioned and all the control operations were not performed correctly.

본 고안은 이와 같은 결점을 해소시키고자 정전시에는 마이콤의 입력전원을 순간적으로 차단시킬 수 있는 회로를 안출한 것으로서, 이를 도면에 의거 상세히 설명하면 다음과 같다.The present invention devised a circuit that can cut off the input power of the microcomputer momentarily in case of power failure in order to solve such a drawback, which will be described in detail with reference to the drawings.

즉, 제1도에서와 같이 브릿지 정류회로(BR)의 출력단에 충전콘덴서(C1)를 연결하는 한편, 스위칭 트랜지스터(T3)의 콜렉터에 연결하고, 이의 베이스에는 제너다이오드(Dz)를 연결하며, 에미터측의 출력을 마이콤의 입력전원단에 연결되는 것에 있어서, 전원 트랜스(T)의 2차측에 정류다이오드(D1)(D2)를 연결하고, 소용량의 충전용 전해 콘덴서(C2)를 두어 접지시키는 한편, 트랜지스터(T1)의 베이스에 연결하며, 이의 콜렉터에는 상기 트랜지스터(T1)에 역동작하는 트랜지스터(T2)의 베이스에 연결하고, 이 트랜지스터(T2)의 콜렉터를 상기 제너다이오드(Dz)의 캐소오드측에 연결하여 구성한 것이다.That is, as shown in FIG. 1, the charging capacitor C 1 is connected to the output terminal of the bridge rectifying circuit BR, while the charging capacitor C 1 is connected to the collector of the switching transistor T 3 , and the zener diode Dz is connected to the base thereof. In addition, the output of the emitter side is connected to the input power terminal of the microcomputer, the rectifier diode (D 1 ) (D 2 ) is connected to the secondary side of the power transformer (T), and a small capacity electrolytic capacitor (C 2) ) to couple to ground the other hand, connects to the base of the transistor (T 1), and its collector is connected to the base of the transistor (T 2) operating stations for the transistor (T 1), the collector of the transistor (T 2) Is connected to the cathode side of the zener diode (Dz).

미설명부호 R1, R2, R3는 바이어스 저항이다.Reference numerals R 1 , R 2 , and R 3 are bias resistors.

이와 같은 구성으로 된 본 고안의 동작상태를 제2도에서와 같은 타임챠트와 병행하여 상세히 설명하면, 처음 전원이 공급되는 경우에는 용량이 적은 콘덴서(C2)가 먼저 충전 완료되고, 콘덴서 (C1)가 충전완료되므로 트랜지스터(T1)가 ON 되고 트랜지스터(T2)가 OFF되어 트랜지스터(T3)가 ON 되면 마이콤에 전원이 공급된다.When the operation state of the present invention having such a configuration is described in detail in parallel with the time chart as shown in FIG. 2, when the power is first supplied, the capacitor C 2 having a small capacity is first charged, and the capacitor C Since 1 ) is fully charged, the transistor T 1 is turned on, the transistor T 2 is turned off, and when the transistor T 3 is turned on, power is supplied to the microcomputer.

이와 같이 전원이 공급되어 콘덴서(C1)에 충전이 완료되면 마이콤에는 정상적인 전원(제2도의 Vc전압)이 공급되는데, 이후 시각(t1)에서 정전이 되었다면, 전원 공급시에 이미 트랜지스터(T1)는 ON 되어 있으므로 콘덴서 (C1)의 충전 전압은 저항(R2)을 거쳐 트랜지스터(T1)를 통하여 방전을 시작하고, 콘덴서(C2)에 충전된 전압도 저항(R1)을 통하여 방전을 하게 된다.When the power is supplied and the charging of the capacitor C 1 is completed, the microcomputer is supplied with the normal power supply (Vc voltage of FIG. 2). If the power failure occurs at the time t 1 , the transistor T is already supplied at the time of power supply. Since 1 ) is ON, the charging voltage of the capacitor C 1 starts to discharge through the transistor T 1 through the resistor R 2 , and the voltage charged in the capacitor C 2 also increases the resistance R 1 . Discharge through.

그런데, 저항(R1)을 통하여 방전되는 콘덴서(C2)의 방전속도가 콘덴서(C1)의 방전속도에 비하여 훨씬 빠르므로 콘덴서(C2)가 먼저 방전을 하여 시각(t2)에서 트랜지스터(T1)가 OFF 되면, 트랜지스터(T2)가 ON 되어 저항(R2)을 통해서 방전되던 콘덴서(C1)의 충전전압은 거의 대부분이 저항(R3)을 통하여 방전을 계속한다.However, since the discharge speed of the capacitor C 2 discharged through the resistor R 1 is much faster than the discharge speed of the capacitor C 1 , the capacitor C 2 discharges first and the transistor at time t 2 . When (T 1 ) is turned off, the charging voltage of the capacitor (C 1 ), which is turned on by the transistor (T 2 ) and discharged through the resistor (R 2 ), continues to be discharged through the resistor (R 3 ).

이때에는 트랜지스터(T2)가 ON 상태에서이므로 트랜지스터(T3)의 베이스 전위가 0 전위로 떨어져서 트랜지스터(T3)가 OFF 되기 때문에 마이콤에 입력되는 전원은 완전 차단된다.At this point, the transistor (T 2) is so because the transistor (T 3) the base potential of the transistor off to zero potential (T 3) of the power OFF from the ON state is input to the microprocessor is cut off completely.

이후 시각(t3)에서 정전이 복귀되었다면, 콘덴서(C1)가 다시 충전되고 완전히 방전되었던 콘덴서(C2)에 충전이 다시 시작되어 트랜지스터(T1)가 ON 되는 시각(t4)에서 트랜지스터(T3)가 ON 되어 출력측에 마이콤 구동 입력전원이 공급되는 것이다.After that, if the power failure is restored at time t 3 , the capacitor C 1 is charged again and the charging starts again at the capacitor C 2 which has been completely discharged so that the transistor T 1 is turned on at time t 4 . (T 3 ) is ON and the microcomputer drive input power is supplied to the output side.

이와 같이 전원공급도중 정전이 되는 경우에는 순간적으로 짧은 시간(t1~t2)내에 출력을 차단시키게 되므로 정전으로 전압이 강하하여 콘덴서(C1)의 전위가 논리레벨 Low로 되는 상한전압(Va)으로 떨어지기전에 전원이 복귀되더라도 마이콤은 오동작할 염려가 없는 것이다.In the case of a power failure during the power supply, the output is interrupted within a short time (t 1 to t 2 ). Therefore, the upper limit voltage Va at which the potential of the capacitor C 1 becomes a logic level low due to the voltage drop due to the power failure. Even if the power is restored before falling to), the microcomputer will not malfunction.

Claims (1)

전원 트랜스(T) 및 정류회로(BR)를 통한 전원 전압의 출력단에 콘덴서(C1)를 연결하고, 저항(R3)과 제너다이오드(Dz)의 접속점을 베이스로 하는 트랜지스터(T3)의 콜렉터에 연결하여 이의 에미터측을 마이콤에 연결하는 것에 있어서, 상기 전원트랜스(T)의 양단에 정류용 다이오드(D1)(D2)를 연결하고, 충방전 콘덴서(C2)를 두어 접지시키는 한편 저항(R1)을 통하여 트랜지스터(T1)의 베이스에 연결하며, 이의 콜렉터에 상기 트랜지스터(T1)에 역작용하는 스위칭 트랜지스터(T2)의 베이스에 연결하고, 이 트랜지스터(T2)의 콜렉터에는 상기 제너다이오드(Dz)의 캐소오드측에 연결하여 결합됨을 특징으로 하는 마이콤의 순간 정전시 오동작 방지회로.The capacitor C 1 is connected to the output terminal of the power supply voltage through the power supply transformer T and the rectifier circuit BR, and the transistor T 3 is based on the connection point of the resistor R 3 and the zener diode Dz. In connecting the emitter side to the microcomputer by connecting to the collector, the rectifying diodes (D 1 ) (D 2 ) are connected to both ends of the power transformer (T), and the charge and discharge capacitor (C 2 ) is placed and grounded. on the other hand via the resistor (R 1) connected to the base of the transistor (T 1) and connected to the base of the switching transistor (T 2) for inverse agonists to the transistor (T 1) to its collector, and of the transistor (T 2) The collector is connected to the cathode side of the zener diode (Dz) coupled to the malfunction prevention circuit during a momentary power failure of the microcomputer.
KR2019840001164U 1984-02-14 1984-02-14 Power circuit KR880000768Y1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019840001164U KR880000768Y1 (en) 1984-02-14 1984-02-14 Power circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2019840001164U KR880000768Y1 (en) 1984-02-14 1984-02-14 Power circuit

Publications (2)

Publication Number Publication Date
KR850007209U KR850007209U (en) 1985-10-04
KR880000768Y1 true KR880000768Y1 (en) 1988-03-15

Family

ID=19233117

Family Applications (1)

Application Number Title Priority Date Filing Date
KR2019840001164U KR880000768Y1 (en) 1984-02-14 1984-02-14 Power circuit

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KR (1) KR880000768Y1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100545717B1 (en) * 2001-11-23 2006-01-24 최진민 Gas Detector Power Supply

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Publication number Publication date
KR850007209U (en) 1985-10-04

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