KR940003077Y1 - Over voltage protective apparatus - Google Patents
Over voltage protective apparatus Download PDFInfo
- Publication number
- KR940003077Y1 KR940003077Y1 KR2019890001007U KR890001007U KR940003077Y1 KR 940003077 Y1 KR940003077 Y1 KR 940003077Y1 KR 2019890001007 U KR2019890001007 U KR 2019890001007U KR 890001007 U KR890001007 U KR 890001007U KR 940003077 Y1 KR940003077 Y1 KR 940003077Y1
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- KR
- South Korea
- Prior art keywords
- voltage
- heater
- microcomputer
- power
- overvoltage
- Prior art date
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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
- H02H7/125—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 rectifiers
- H02H7/1252—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 rectifiers responsive to overvoltage in input or output, e.g. by load dump
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/0019—Circuit arrangements
Abstract
내용 없음.No content.
Description
제1도는 본 고안 장치의 회로도.1 is a circuit diagram of the device of the present invention.
제2a 내지 g도는 본 고안 장치의 각부 동작 파형도.2a to g is a diagram showing the operation of each part of the device of the present invention.
본 고안은 전열기기의 과전압 보호장치에 관한 것으로서 특히, 마이콤에서 연결된 정류부의 출력에 이상전압을 감지하는 전압감지부를 설치하되 전압감지부의 출력을 마이콤의 리세트 단자에 연결하여 입력전압의 변동에 따른 부하의 손상을 방지할수 있도록한 전열기의 과전압 보호장치에 관한 것이다.The present invention relates to an overvoltage protection device for a heating device. In particular, a voltage sensing unit for detecting an abnormal voltage is installed at an output of a rectifying unit connected to a microcomputer, and the output of the voltage sensing unit is connected to a reset terminal of the microcomputer according to a change in input voltage. The present invention relates to an overvoltage protection device of a heater that prevents damage to a load.
종래의 전열기에서는 과전압 입력시 퓨우즈의 용융이나 바랙터의 정격전압 이상일때 바랙터의 단락에 의존하므로서 사용자의 부주의로 인해 과전압을 인가(즉 100V용 전열기에 만약 220V를 인가한 경우)할 경우에는 퓨우즈와 바랙터를 교체해 주어야 할뿐만 아니라 만약, 퓨우즈나 바랙터에 이상이 있을때는 부하인 히터등이 과열됨에 따라 화재가 일어나게 되는 등의 단점이 있다.In conventional heaters, when overvoltage is input, the fuse is melted or when the voltage exceeds the varactor's rated voltage, depending on the short circuit of the varactor. In addition to the need to replace the fuse and varactor, if there is an error in the fuse or varactor, there is a disadvantage such as a fire occurs as the heater is overheated load.
본 고안은 이와같은 종래의 단점을 해결하기 위하여 마이콤에 전압을 공급하는 정류부의 출력에 이상전압을 감지하는 전압감지부를 설치하여 이상전압이 감지되면 마이콤의 리세트 단자에 제어신호를 인가시켜 마이콤을 리세트시켜 주므로서 히터에 인가되는 교류전원이 차단되어 히터의 과열로 야기되는 화재등을 방지할수 있도록 한 전열기의 과전압 보호장치를 제공하는 것을 목적으로 하며, 이하 첨부된 도면을 참조하여 본 고안 장치의 구성 및 작용효과를 상세히 설명하면 다음과 같다.In order to solve the above disadvantages, the present invention installs a voltage sensing unit for detecting an abnormal voltage at the output of the rectifying unit supplying the voltage to the microcomputer, and applies a control signal to the reset terminal of the microcomputer when the abnormal voltage is detected. It is an object of the present invention to provide an overvoltage protection device for a heater that can prevent a fire caused by overheating of the heater by cutting off the AC power applied to the heater by resetting. The configuration and effect of the described in detail as follows.
제1도에 의하면 본 고안 장치는 교류전원(AC)이 일차코일에 연결된 트랜스(T1)의 2차코일에 연결된 정류부(1)와, 제너다이오드(ZD1)와 트랜지스터(Q1)로 구성되어 정류부(1)의 출력에서 이상전압을 감지하여 마이콤(4)의 리세트단자에 제어신호를 인가하는 전압감지부(2)와, 트랜지스터(Q2,Q3,Q4)와 제너다이오드(ZD2) 및 다이오드(D3)로 구성된 정전압부(3)와, 마이콤(4)의 제어출력(P)에 의하여 계전기(RL1)의 구동을 제어하는 트랜지스터(Q5)를 구성된 계전기 구동부(5)을 설치하여 된 것으로서 여기서 H는 히터, R1 내지 R11은 저항, BD는 브릿지 다이오드, D1, D3는 다이오드, C1, C2, C3는 콘덴서, 6은 정전압 레귤레이터이다.According to FIG. 1, the device of the present invention includes a rectifier 1 connected to a secondary coil of a transformer T1 connected to an AC power source, a zener diode ZD1, and a transistor Q1. Reset terminal of microcomputer 4 by detecting abnormal voltage at output of 1) A voltage sensing section 2 for applying a control signal to the constant voltage section, a constant voltage section 3 composed of transistors Q2, Q3 and Q4, a zener diode ZD2 and a diode D3, and a control output of the microcomputer 4 The relay driver 5 includes the transistor Q5 for controlling the driving of the relay RL1 by P), where H is a heater, R1 to R11 is a resistor, BD is a bridge diode, and D1 and D3 are diodes. , C1, C2, and C3 are capacitors, and 6 are constant voltage regulators.
이와같은 구성으로 된 본 고안 장치의 작용효과를 제2a∼g도를 참조하여 설명하면 먼저 교류전원(AC)을 인가하게 되면 정류부(1)의 브릿지 다이오드(BD)를 통해 제2a도와 같이 전파정류된 전류가 평활콘덴서(C1)에 서서히 충전됨에 따라 J점에는 제2b도에 도시된 바와같은 전압이 나타나게 된다.Referring to the effects of the device of the present invention having such a configuration with reference to Figures 2a to g when first applying the AC power (AC) as shown in Figure 2a through the bridge diode (BD) of the rectifier 1 As the current is gradually charged in the smoothing capacitor C1, the voltage as shown in FIG.
따라서 콘덴서(C1)의 양단전압이 일정전압(약 10V)이상이 되면 전류가 접지에서 제너다이오드(ZD2)와 저항(R6-R8,R11) 및 다이오드(D3)를 통해 흐르게 됨에따라 정전압부(3)의 트랜지스터(Q2)가 온이 되어 마이콤(4)의 전원단자(VSS)에는 제2e도와 같은 전압이 인가되므로서 마이콤(4)이 동작하게 된다.Therefore, when the voltage between both ends of the capacitor (C1) exceeds a certain voltage (about 10V), the current flows through the zener diode (ZD2), resistors (R6-R8, R11) and diode (D3) from the ground, the constant voltage section (3) Transistor Q2 is turned on, and the microcomputer 4 operates by applying the same voltage as that of the second e diagram to the power supply terminal VSS of the microcomputer 4.
또한 콘덴서(C1)의 양단전압이 조금씩 상승하기 시작하여 일정전압(약 20V)이 되면 저항(R6) 양단전압이 트랜지스터(Q3)를 온시킬수 있을 정도가 됨에따라 트랜지스터(Q3)가 온이 되어 트랜지스터(Q4)는 오프된다.In addition, when the voltage across the capacitor C1 starts to increase little by little and reaches a constant voltage (about 20 V), the transistor Q3 is turned on as the voltage between the resistor R6 and the voltage between the resistor R6 is sufficient to turn on the transistor Q3. Q4 is turned off.
따라서 트랜지스터(Q4)의 콜렉터에 인가되는 전압이 콘덴서(C3)에 서서히 충전됨에 따라 마이콤(4)의 리세트단자에는 '하이'(즉 접지레벨)가 인가되므로서 마이콤(4)은 정상적인 동작을 행하게 된다.Therefore, as the voltage applied to the collector of transistor Q4 is gradually charged in the capacitor C3, the reset terminal of the microcomputer 4 'High' (i.e., ground level) is applied to the microcomputer 4 to perform normal operation.
즉, 마이콤(4)의 출력(P)이 '로우'가 됨에따라 계전기 구동부(5)의 트랜지스터(Q5)가 온이 되므로서 계전기(RL1)의 접점스위치(SW1)가 온이되어 히터(H)에 전원(AC)의 Y인가된다.That is, as the output P of the microcomputer 4 becomes 'low', the transistor Q5 of the relay driver 5 is turned on, so that the contact switch SW1 of the relay RL1 is turned on so that the heater H is turned on. Is applied to the power supply AC.
이때 (즉 마이콤(4)이 정상적으로 동작할때) 콘덴서(C1)의 양단전압(약 30V)이 전압감지부(2) 내의 제너다이오드(ZD1)를 온시킬수 있는 전압이하가 되므로서 트랜지스터(Q1)는 오프된다. 또한 입력에 과전압(정격전압의 약 130% 정도)이 인가되면 콘덴서(C1)의 양단전압(약 37V)도 상승하게 됨에따라 콘덴서(C1)의 양단에 직렬로 연결된 다이오드(D1)와 제너다이오드(ZD1) 및 분배저항(R1,R10)의 전압분배에 의해 트랜지스터(Q1)가 온이 되므로서 마이콤(4)의 리세트단자에는 '로우'가 인가되어 마이콤(4)은 초기화된다.At this time (ie, when the microcomputer 4 operates normally), the voltage at both ends of the capacitor C1 (about 30 V) becomes less than or equal to a voltage at which the zener diode ZD1 in the voltage sensing unit 2 is turned on. Is off. In addition, when an overvoltage (approximately 130% of the rated voltage) is applied to the input, the voltage at both ends of the capacitor C1 (about 37V) also increases, so that a diode D1 and a zener diode connected in series at both ends of the capacitor C1 ( The reset terminal of the microcomputer 4 is turned on because the transistor Q1 is turned on by the voltage distribution between the ZD1) and the distribution resistors R1 and R10. 'Low' is applied to the microcomputer 4 is initialized.
따라서 마이콤(4)의 출력단자(P)에서는 '하이'가 출력됨에 따라 계전기(RL1)의 접점스위치(SW1)가 오프되어 히터(H)에 인가되는 교류전원(AC)이 차단되므로서 이상전압에 의한 히터(H)의 과열로 야기되는 화재를 막을수 있다.Therefore, the output terminal P of the microcomputer 4 outputs a 'high', so that the contact switch SW1 of the relay RL1 is turned off to cut off the AC power applied to the heater H, thereby causing an abnormal voltage. It is possible to prevent the fire caused by overheating of the heater (H) by the.
여기서 제2a∼g도를 좀더 상세히 설명하면 제2a도는 입력전압을 나타낸 것이고, (b)는 J점의 전위를 나타낸 것이며, (c)는 J점의 전위에서 K점의 전위를 뺀 것이고, (d)도는 W점의 전위이며, (e)는 X점의 전위를 나타낸 것이고, (f)도는 Y점, (g)도는 Z점의 전위를 나타낸 것이며, T1은 리세트 구간이고, T2는 정상적인 동작일때이며, T3는 과전압시를 나타낸 것이다.2a to g illustrate the input voltage, (b) shows the potential of point J, (c) is the potential of point J minus the potential of point K, ( d) is the potential of point W, (e) is the potential of X point, (f) is the potential of Y point, (g) is the potential of Z point, T1 is the reset period, T2 is normal In operation, T3 indicates overvoltage.
이상에서 설명한 바와같은 본 고안 장치는 입력전압의 변화를 감지하여 과전압이 인가되면 마이콤을 리세트시켜 히터에 공급하는 전원을 차단하므로서 부하의 과열로 인한 화재를 방지하게 된다.As described above, the device of the present invention senses a change in the input voltage and resets the microcomputer when the overvoltage is applied to cut off the power supply to the heater, thereby preventing fire due to overheating of the load.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890001007U KR940003077Y1 (en) | 1989-01-31 | 1989-01-31 | Over voltage protective apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019890001007U KR940003077Y1 (en) | 1989-01-31 | 1989-01-31 | Over voltage protective apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR900015015U KR900015015U (en) | 1990-08-02 |
| KR940003077Y1 true KR940003077Y1 (en) | 1994-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019890001007U KR940003077Y1 (en) | 1989-01-31 | 1989-01-31 | Over voltage protective apparatus |
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| Country | Link |
|---|---|
| KR (1) | KR940003077Y1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002074559A1 (en) * | 2001-03-20 | 2002-09-26 | Kumho Tire Co., Inc. | Pneumatic tire with reinforced bead part |
-
1989
- 1989-01-31 KR KR2019890001007U patent/KR940003077Y1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002074559A1 (en) * | 2001-03-20 | 2002-09-26 | Kumho Tire Co., Inc. | Pneumatic tire with reinforced bead part |
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| Publication number | Publication date |
|---|---|
| KR900015015U (en) | 1990-08-02 |
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