KR960003008B1 - Interception circuit of alarm and micom power supply for an abnormal voltage - Google Patents

Interception circuit of alarm and micom power supply for an abnormal voltage Download PDF

Info

Publication number
KR960003008B1
KR960003008B1 KR1019930010164A KR930010164A KR960003008B1 KR 960003008 B1 KR960003008 B1 KR 960003008B1 KR 1019930010164 A KR1019930010164 A KR 1019930010164A KR 930010164 A KR930010164 A KR 930010164A KR 960003008 B1 KR960003008 B1 KR 960003008B1
Authority
KR
South Korea
Prior art keywords
voltage
alarm
unit
microcomputer
transformer
Prior art date
Application number
KR1019930010164A
Other languages
Korean (ko)
Other versions
KR950001453A (en
Inventor
박윤명
Original Assignee
엘지전자주식회사
이헌조
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 엘지전자주식회사, 이헌조 filed Critical 엘지전자주식회사
Priority to KR1019930010164A priority Critical patent/KR960003008B1/en
Publication of KR950001453A publication Critical patent/KR950001453A/en
Application granted granted Critical
Publication of KR960003008B1 publication Critical patent/KR960003008B1/en

Links

Classifications

    • 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
    • H02H7/10—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 converters; for rectifiers
    • H02H7/12—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 converters; for rectifiers for static converters or rectifiers
    • H02H7/1213—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 converters; for rectifiers for static converters or rectifiers for DC-DC converters
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/185—Electrical failure alarms
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0064—Magnetic structures combining different functions, e.g. storage, filtering or transformation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The power supplied to a microcomputer is cut when an abnormal voltage is supplied to a microcomputer. The circuit includes a transformer(21) for stepping down voltage level of an input AC voltage, a rectifier(22) for rectifying AC voltage, a filter(23) for smoothing filtered voltage, a voltage level detector(25) for detecting output voltage level of the filter(23), a constant voltage regulator(26) for regulating filtered voltage with certain level, an alarm(27) for generating an alarm signal when an alarm control signal is transmitted from a microcomputer(24), and a circuit breaker(28) for breaking power supplied to the rectifier when a high voltage is applied.

Description

이전압 인가시 경보 및 마이콤 전원차단 회로Alarm and Micom power off circuit

제1도는 종래 정전압 회로도.1 is a conventional constant voltage circuit diagram.

제2도는 본 발명 이전압 인가시 경보 및 전원차단 회로도.2 is a circuit diagram illustrating alarm and power cutoff when the present invention is applied with two voltages.

제3도는 이전압 검출부의 전압이 걸리는 상태도.3 is a state diagram in which the voltage of the second voltage detector is applied.

제4도는 본 발명 이전압 인가시 경보 및 전원차단 회로의 동작 흐름도.Figure 4 is a flow chart of the operation of the alarm and power off circuit when applying the present invention two voltage.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

21 : 트랜스포머 25 : 이전압 검출부21 transformer 25 a voltage detection unit

27 : 경보부 28 : 전원차단부27: alarm unit 28: power cut off

본 발명은 정상 전압 모드에서 이전압이 인가될때 이를 감지하여 경보를 내며 마이콤을 보호하기 위해 마이콤으로 입력되는 전압을 차단하는 이전압 인가시 경보 및 전원차단 회로에 관한 것이다.The present invention relates to an alarm and power cut-off circuit when applying a voltage applied to detect a voltage when the voltage is applied in the normal voltage mode and cuts off the voltage input to the microcomputer to protect the microcomputer.

종래 정전압 회로는 제1도에 도시되는 바와 같이, 1차측에 인가되는 임의의 교류전압을 강하시키는 트랜스포머(11)와, 상기 트랜스포머(11)의 2차측에서 출력된 전압을 직류전압으로 정류하는 정류부(12)와, 상기 정류부(12)에서 출력되는 전압을 필터링하는 필터부(13)와, 상기 필터부(13)에서 출력된 직류전압을 일정하게 유지시켜 마이콤(14)에 인가하는 정전압부(15)로 이루어졌다.As shown in FIG. 1, the conventional constant voltage circuit includes a transformer 11 for dropping an arbitrary AC voltage applied to the primary side, and a rectifier for rectifying the voltage output from the secondary side of the transformer 11 to a DC voltage. (12), a filter unit 13 for filtering the voltage output from the rectifying unit 12, and a constant voltage unit for maintaining the DC voltage output from the filter unit 13 and applying it to the microcomputer 14 ( 15).

이와 같은 종래 정전압회로는 제1도에 도시되는 바와 같이, 임의의 교류전압이 트랜스포머(11)의 1차측에 인가되면 전압을 강하시켜 정류부(12)에 인가하며, 상기 정류부(12)는 이 전압을 반파 정류하여 직류전압으로 변화시켜 필터부(13)에 인가하면 필터부(13)는 인가된 직류전압 내의 리플전압을 제거하여 정전압부(15)에 출력전압을 인가시키면 정전압부(15)는 일정한 전압을 유지시켜 마이콤(14)의 입력단자(Vcc)로 전압을 인가시켰다.In the conventional constant voltage circuit as shown in FIG. 1, when an arbitrary AC voltage is applied to the primary side of the transformer 11, the voltage is lowered and applied to the rectifying unit 12, and the rectifying unit 12 applies this voltage. Is converted into a DC voltage and applied to the filter unit 13, the filter unit 13 removes the ripple voltage within the applied DC voltage and applies the output voltage to the constant voltage unit 15. The voltage was applied to the input terminal Vcc of the microcomputer 14 while maintaining a constant voltage.

그러나, 이러한 종래 정전압회로는, 외부요인이나 기타 요인에 의해 정전압이 아닌 이 전압이 인가될 경우 트랜스포머가 파손되어 마이콤으로 입력되는 전압이 불안정하게 되는 문제점이 있었다.However, such a conventional constant voltage circuit has a problem in that when this voltage is applied instead of the constant voltage due to external factors or other factors, the transformer is damaged and the voltage input to the microcomputer becomes unstable.

본 발명의 목적은 상기와 같은 종래의 문제점을 해결하기 위한 것으로, 이 전압 인가시 이를 검출하여 제어하고 경보를 함으로 트랜스포머의 파손을 미연에 방지하고, 마이콤에 공급되는 전압을 안정하게 하기 위한 이 전압 인가시 경보 및 마이콤 전원차단 이 전압 인가시 경보 및 마이콤 전원차단 회로를 제공하는데 있다.An object of the present invention is to solve the conventional problems as described above, this voltage for preventing the damage of the transformer in advance by detecting, controlling and alarming this voltage applied, and to stabilize the voltage supplied to the microcomputer Alarm and Micom Shutdown When Applied This provides an alarm and micom shut down circuit when voltage is applied.

이하 본 발명의 기술적 구성을 상세히 설명하면 다음과 같다.Hereinafter, the technical configuration of the present invention in detail.

본 발명 이전압 인가시 경보 및 전원차단 회로는 제2도와 제3도에 도시되는 바와 같이, 1차측으로 인가되는 임의의 교류전압을 강하시키는 트랜스포머(21)와, 상기 트랜스포머(21)의 2차측에서 출력된 전압을 직류전압으로 정류하는 정류부(22)와, 상기 정류부(22)에서 출력되는 전압을 필터링하는 필터부(23)와, 상기 필터부(23)에서 출력되는 전압이 인가되며 정류부(22)에서 출력되는 12V계의 전압을 검출하여 마이콤(24)의 이전압 검출포트(P1)에 인가하는 이전압 검출부(25)와, 전압을 일정하게 유지시켜 마이콤(24)에 인가하는 정전압부(26)와, 상기 이전압 검출부(25)에서 출력된 신호가 인가된 마이콤(24)으로부터 경보신호가 인가되어 부저소리를 발생시키는 경보부(27)와, 트랜스포머(21)와 정류부(22) 사이에 연결되어 이전압인가시 과전류에 의해 전원이 차단되는 PTC소자로 이루어진 전원차단부(28)로 구성함을 그 기술적 구성상의 특징으로 한다.According to the present invention, when the two voltage is applied, the alarm and power cut-off circuit includes a transformer 21 for dropping any AC voltage applied to the primary side, as shown in FIGS. 2 and 3, and a secondary side of the transformer 21. The rectifier 22 rectifies the voltage output from the DC voltage, the filter unit 23 for filtering the voltage output from the rectifier 22, and the voltage output from the filter unit 23 is applied to the rectifier unit ( 22 is a voltage detection unit 25 for detecting the voltage of the 12V system output from the 22 and applied to the voltage detection port (P1) of the microcomputer 24, and a constant voltage unit for applying the voltage to the microcomputer 24 by keeping the voltage constant (26), between the alarm unit 27 and the transformer 21 and the rectifier 22 to generate an buzzer sound by applying an alarm signal from the microcomputer 24 to which the signal output from the voltage detection unit 25 is applied. Power is cut off due to overcurrent It is characterized by the technical configuration of the power blocking unit 28 made of a PTC element.

이러한 본 발명 이전압 인가시 경보 및 전원차단 회로는 교류전압이 트랜스포머(21)의 1차측에 인가되면 트랜스포머(21)는 1차측 전압을 2차측으로 여기시켜 임의의 전압으로 강하 출력하여 정류부(22)에 인가한다. 이때 정상전압이 아닌 이전압이 인가되면 트랜스포머(21)의 1차측의 이전압을 2차측으로 과도하게 여기시켜 필터부(23)에 필터링하며 이전압 검출부(25)에는 기준 전압(Vref)보다 과전압이 걸리게 된다. 임의의 입력전압을 V0라 하고 이것을 식으로 나타내면,In the present invention, when the second voltage is applied, the alarm and the power cut-off circuit, when an AC voltage is applied to the primary side of the transformer 21, the transformer 21 excites the primary side voltage to the secondary side to drop the output voltage to an arbitrary voltage, and the rectifier 22 ) Is applied. At this time, when a voltage other than the normal voltage is applied, the secondary voltage of the transformer 21 is excessively excited to the secondary side to be filtered by the filter unit 23, and the voltage detection unit 25 has a voltage higher than the reference voltage V ref . Overvoltage is applied. If any input voltage is called V 0 and this is expressed as

, ,

Vref(기준전압) = V0×R2/ (R1+R2)이다.V ref (reference voltage) = V 0 × R 2 / (R 1 + R 2 ).

이 과전압을 마이콤(24)의 이전압 검출포트(P1)로 감지하여 부저 출력(P2)에서 경보부(27)로 연속음 출력신호를 내보내어 경보부(27)에서 부저 경보음이 울리고 경보와 독립적으로 전원차단부(28)의 PTC소자가 일정 시간경과 후 오픈되어 발생한 과전류가 트랜스포머(21)와 마이콤(24)에 흐르는 것을 차단하여 이들을 보호한다.The overvoltage is sensed by the second voltage detection port P1 of the microcomputer 24 and the continuous sound output signal is output from the buzzer output P2 to the alarm unit 27 so that the buzzer alarm sounds at the alarm unit 27 and independently of the alarm. The PTC element of the power cut-off unit 28 is opened after a predetermined time elapses to prevent the overcurrent generated from flowing through the transformer 21 and the microcomputer 24 to protect them.

본 발명 이 전압 인가시 경보 및 마이콤 전원차단 회로의 동작방법을 제4도를 첨부하여 살펴보면, 임의의 전압이 인가되고(S1), 이 인가된 전압이 정상 전압보다 큰가를 판단하는 단계(S2)와, 정상 전압이면 계속적인 정상의 동작을 계속하고(S3), 정상전압이 아니면 경보부를 통하여 부저를 울리는 단계(S4)와, 경보와 독립적으로 전원을 차단하는 단계(S5)로 구성된다.Referring to FIG. 4, the operation method of the alarm and the microcomputer power cut-off circuit when the voltage is applied will be described with reference to FIG. 4. And, if the normal voltage continues to continue the normal operation (S3), if not the normal voltage is composed of a step of ringing the buzzer through the alarm (S4), and the step of shutting off the power independently of the alarm (S5).

아래의 표 1은 PTC 정수를 결정하는 데이터를 나타내는 것을 표로 보여준다.Table 1 below shows a table showing data for determining PTC constants.

[표 1]TABLE 1

이상에서 살펴 본 바와 같이, 본 발명 이 전압 인가시 경보 및 마이콤 전원차단 회로는 정상 전압 모드에서 이 전압이 인가될때 전원단부(28)에 의해 일정시간 경과후 전원이 자동으로 차단되어 각종 부품을 보호하고 또한 이전압인가시 이것을 감지부가 감지하여 감지된 신호가 마이콤의 입력단(P1)에 입력되고, 마이콤 출력단(P2)을 통해 경보부(27)에 경보신호를 내게한다. 본 발명은 상기와 같이 부품의 보호, 경보신호 뿐만 아니라 전원단을 형성하는 전원회로에도 적용할 수 있는 유용한 것이다.As described above, when the voltage is applied to the present invention, the alarm and the microcomputer power cut off circuit are automatically cut off by a power supply 28 after a certain time when the voltage is applied in the normal voltage mode to protect various components. In addition, when this voltage is applied, the sensing unit senses the detected signal is input to the input terminal P1 of the microcomputer and sends an alarm signal to the alarm unit 27 through the microcomputer output terminal P2. The present invention is useful as applicable to the power supply circuit forming the power stage as well as the protection of the components, the alarm signal as described above.

Claims (1)

1차측으로 인가되는 임의의 교류전압을 강하시키는 트랜스포머와, 상기 트랜스포머의 2차측에서 출력된 전압을 직류전압으로 정류하는 정류부와, 상기 정류부에서 출력되는 전압을 필터링하는 필터부와, 상기 필터부의 출력전압이 기준 전압보다 높은지를 검출하는 이 전압 검출부와, 상기 필터부의 출력전압을 일정하게 유지시켜 마이콤에 인가하는 정전압부와, 상기 이전압 검출부에서 검출된 과전압에 반응하여 마이콤으로부터 경보신호가 인가되어 부저소리를 발생시키는 경보부와, 트랜스포머와 정류부 사이에 연결되어 상기 과전압 인가시 과전류에 의해 절단되어 전원을 차단하는 전원차단부로 구성함을 특징으로 하는 이전압 인가시 경보 및 마이콤 전원차단 회로.A transformer for dropping any AC voltage applied to the primary side, a rectifier for rectifying the voltage output from the secondary side of the transformer to a DC voltage, a filter unit for filtering the voltage output from the rectifier unit, and an output of the filter unit An alarm signal is applied from the microcomputer in response to the overvoltage detected by the voltage detecting unit for detecting whether the voltage is higher than the reference voltage, the constant voltage unit for applying to the microcomputer by keeping the output voltage of the filter unit constant, and And a power cut-off unit connected between a transformer and a rectifier for generating a buzzer sound, and a power cut-off unit cut off by over-current when the over-voltage is applied to cut off the power.
KR1019930010164A 1993-06-05 1993-06-05 Interception circuit of alarm and micom power supply for an abnormal voltage KR960003008B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930010164A KR960003008B1 (en) 1993-06-05 1993-06-05 Interception circuit of alarm and micom power supply for an abnormal voltage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930010164A KR960003008B1 (en) 1993-06-05 1993-06-05 Interception circuit of alarm and micom power supply for an abnormal voltage

Publications (2)

Publication Number Publication Date
KR950001453A KR950001453A (en) 1995-01-03
KR960003008B1 true KR960003008B1 (en) 1996-03-02

Family

ID=19356857

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930010164A KR960003008B1 (en) 1993-06-05 1993-06-05 Interception circuit of alarm and micom power supply for an abnormal voltage

Country Status (1)

Country Link
KR (1) KR960003008B1 (en)

Also Published As

Publication number Publication date
KR950001453A (en) 1995-01-03

Similar Documents

Publication Publication Date Title
EP0914705B1 (en) Overvoltage protection circuit for smps based on demagnetization signal
JP2005340181A (en) Two terminal line voltage thermostat
US5771162A (en) Electric protective device used in switching mode power supply systems
US5375032A (en) Trip control device for circuit breaker
US6449180B1 (en) World wide power supply apparatus that includes a relay switch voltage doubling circuit
KR960003008B1 (en) Interception circuit of alarm and micom power supply for an abnormal voltage
KR101395217B1 (en) Apparatus for blocking power according to load current
KR101032045B1 (en) Switching mode power supply apparatus having over voltage protection function
US5638245A (en) Electric power cut-off detection unit for a monitor
KR0123006B1 (en) Power conversion device
JPH09215176A (en) Overvoltage protective unit
KR100532037B1 (en) Elevator protector and method
KR101124832B1 (en) Apparatus and Method for controlling of power according to monitering of waveform distortion
JPH08163866A (en) Switching power supply
JPH09130960A (en) Rush current interruption circuit
JP2003164054A (en) Overvoltage protection circuit
KR100317357B1 (en) Drive control circuit and method of step-up active filter for power factor control
KR950004463B1 (en) Apparatus for protecting tv monitor from surge voltage
KR0147896B1 (en) High voltage output protection circuit using micom
KR910007046Y1 (en) Protecting circuit for power source's short
KR0107819Y1 (en) Power source device with overvoltage input prevention circuits
JPH06276674A (en) Safety protective circuit
JPH0145223Y2 (en)
JP3338309B2 (en) Power circuit
KR0120963Y1 (en) The protecting circuit for output short in switching power supply

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
G160 Decision to publish patent application
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20000303

Year of fee payment: 5

LAPS Lapse due to unpaid annual fee