KR970002432Y1 - Switching mode power supply - Google Patents
Switching mode power supply Download PDFInfo
- Publication number
- KR970002432Y1 KR970002432Y1 KR2019940004489U KR19940004489U KR970002432Y1 KR 970002432 Y1 KR970002432 Y1 KR 970002432Y1 KR 2019940004489 U KR2019940004489 U KR 2019940004489U KR 19940004489 U KR19940004489 U KR 19940004489U KR 970002432 Y1 KR970002432 Y1 KR 970002432Y1
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- Prior art keywords
- power supply
- switching
- mode power
- voltage
- switching mode
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Classifications
-
- 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
- H02M3/325—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 using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
내용없음No content
Description
제1도는 종래 스위칭모드 전원공급기의 회로도.1 is a circuit diagram of a conventional switching mode power supply.
제2도는 종래 스위칭모드 전원공급기의 동작파형도.2 is an operation waveform diagram of a conventional switching mode power supply.
제3도는 본 고안 스위칭모드 전원공급기의 회로도.3 is a circuit diagram of the inventive switch mode power supply.
제4도는 본 고안 스위칭모드 전원공급기의 동작파형도.4 is an operation waveform diagram of a switching mode power supply of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
BD : 브리지다이오드 C1 : 콘덴서BD: Bridge Diode C1: Capacitor
R1,R2 : 저항 TR1 : 트랜지스터R1, R2: Resistor TR1: Transistor
L : 코일 TRAMS : 2차변압기L: Coil TRAMS: Secondary Transformer
가 : 스위칭회로 나 : 스위치수단A: Switching circuit b: Switching means
PC1 : 포토커플러PC1: Photocoupler
본 고안은 스위칭모드 전원공급기에 관한 것으로, 특히 입력전원 전압을 정류하고 정류된 전압을 2차측에 공급하기 위하여 초기 구동시, 발생되는 소음을 제거할 수 있도록 한 스위칭모드 전원공급기에 관한 것이다.The present invention relates to a switching mode power supply, and more particularly to a switching mode power supply to rectify the input power supply voltage and to eliminate the noise generated during initial driving to supply the rectified voltage to the secondary side.
종래 스위칭모드 전원공급기는 제1도에 도시한 바와같이, 전원입력단(AC)으로부터 입력되는 전압을 브리지다이오드(BD)로 정류하고 이정류된 전압은 콘덴서(C1)로 충전함과 아울러, 저항(R1), 코일(L), 트랜지스터(TR1)로 구성된 스위칭회로(가)를 통해서 스위칭하면서 2차측 변압기(TRANS)로 안정된 전압을 공급하도록 되어 있었다.As shown in FIG. 1, the conventional switching mode power supply rectifies the voltage input from the power input terminal AC to the bridge diode BD and charges the rectified voltage to the capacitor C1, It was supposed to supply a stable voltage to the secondary transformer TRANS while switching through a switching circuit composed of R1), coil L, and transistor TR1.
그러나 상기 스위칭모드 전원공급기는 초기 구동시, 상기 브리지다이오드(BD)를 통해서 정류된 전압이 제2도에 도시한 바와같이, 콘덴서(C1)에 충전이 완료되기 전에 낮은 주파수(20KHZ)이하로 상기 스위칭회로(가)가 작동하게 되더 이 스위칭작동에 따른 소음을 발생시키는 문제점을 가지고 있다.However, when the switching mode power supply is initially driven, the voltage rectified through the bridge diode BD is lower than the low frequency 20KHZ before charging to the capacitor C1 is completed, as shown in FIG. The switching circuit (a) is to operate has a problem that generates the noise caused by the switching operation.
따라서 본 고안의 목적은 스위칭모드 전원공급기의 초기구동시, 정류된 전압이 콘덴서에 충전 와료되기 전에 스위칭동작을 하지 못하도록 함으로써, 상기 스위칭동작으로 인한 소음발생을 제거하는데 있다.Therefore, an object of the present invention is to eliminate the noise generated by the switching operation by preventing the switching operation before the rectified voltage is charged to the capacitor during the initial operation of the switching mode power supply.
상기의 목적을 실현하기 위하여 본 고안은 입력전원전압을 정류하고 정류된 전압을 충전하고, 스위칭하면서 2차측 변압기로 전압을 유기하는 스위칭모드 전원공급기에 있어서,상기 스위칭모드 전원공급기의 초기구동시, 정류된 전압이 충전 완료되기 전까지 스위칭동작을 하지 못하도록 하는 스위칭수단을 구비하여서 된 것을 특징으로 한다.In order to achieve the above object, the present invention rectifies an input power supply voltage, charges a rectified voltage, and switches a switch mode power supply to induce a voltage to a secondary transformer while switching, during initial operation of the switch mode power supply, Characterized in that the switching means for preventing the switching operation until the rectified voltage is completed charging.
이하 첨부된 도면에 의거 본 고안을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
제3도는 본 고안 스위칭모드 전원공급기의 회로도 로서,3 is a circuit diagram of the inventive switch mode power supply,
입력전원전압(AC)을 정류하는 브리지다이오드(BD)와,A bridge diode (BD) for rectifying the input power voltage (AC),
상기 브리지다이오드(BD)에서 정류된 전압을 충전하는 콘덴서(C1)와,A capacitor C1 charging the voltage rectified by the bridge diode BD;
상기 콘덴서(C1)에서 충전이 완료되면 스위칭 동작하는 스위칭회로(가)와,A switching circuit for switching when the charging is completed in the capacitor C1;
상기 스위칭회로(가)에서 발생되는 전압을 유기하는 2차 변압기(TRANS)로 구성되는 스위칭모드 전원공급기에 있어서,In the switching mode power supply consisting of a secondary transformer (TRANS) for inducing a voltage generated in the switching circuit (a),
상기 스위칭모드 전원공급기의 초기구동시, 상기 정류된 전압이 콘덴서(C1)에 충전 완료될 때 까지 스위칭회로(가)가 동작이 하지 못하도록 하는 포토커플러(PC1)인 스위칭수단(나)을 구성하여서 된 것이다.In the initial operation of the switching mode power supply, by configuring a switching means (b) which is a photocoupler (PC1) to prevent the switching circuit (a) from operating until the rectified voltage is completed charging the capacitor (C1) It is.
제4도는 본 고안 스위칭모드 전원공급기의 파형도 이다.4 is a waveform diagram of the inventive switch mode power supply.
상기와 같이 구성되는 본 고안의 작용효과를 설명하면 다음과 같다.Referring to the effect of the present invention is configured as described above are as follows.
먼저 스위칭모드 전원공급기에 전원을 인가한 상태에서, 초기에 전원을 온시키게 되면, 상기 입력전원전압(AC)이 브리지다이오드(BD)를 통해서 전파정류되고, 이 전파 정류된 전업은 콘덴서(C1)에 충전이 되게 되는데, 이때 상기 전파정류된 전압은 제4도에 도시한 바와같이, 상기 콘덴서(C1)에 충전이 완료되기전 까지는 상기 스위칭수단(나)에 인가되는 전압이 미소전류이기 때문에 상기 스위칭수단(나)인 포토커플러(PC1)의 발광소자를 구동시키지 못하게 되므로 스위칭회로(가)와 접속된 상기 포토커플러(PC1)의 수광소자를 턴온 시키지 못하기 때문에 상기 스위칭회로(가)는 스위칭동작을 하지 않게 되어 2차 변압기(TRANS)에는 전압이 유기되지 않게 된다.First, when the power is initially turned on while the power is supplied to the switching mode power supply, the input power voltage AC is full-wave rectified through the bridge diode BD, and the full-wave rectified electric power is condenser C1. At this time, the full-wave rectified voltage is as shown in FIG. 4, since the voltage applied to the switching means (B) is a microcurrent until the capacitor C1 is completely charged. Since the light emitting element of the photocoupler PC1, which is the switching means (b), cannot be driven, the switching circuit a) cannot be turned on because the light receiving element of the photocoupler PC1 connected to the switching circuit A cannot be turned on. As a result, no voltage is induced in the secondary transformer (TRANS).
이어서 상기 정류된 전압이 소정시간이 경과하여 제4도에 도시한 바와같이 콘덴서(C1)에 충전이 완료되면 상기 콘덴서(C1)는 충전된 전압을 방전하게 되도 이방전전압은 스위칭수단(나)인 포토커플러(PC1)의 발광소자를 구동시키게 되어 상기 발광소자는 상기 스위칭회로(가)에 접속된 수광소자를 턴온시키게 되므로 상기 방전전압은 상기 수광소자를 통해서 스위칭회로(가)에 인가되어 상기 스위칭회로(가)를 제4도에 도시한 바와같이 스위칭 동작시키면서 스위칭회로(가)의 코일(L)를 통해서 2차 변압기(TRANS)로 전압을 유지시켜 주게 되는 것이다.Subsequently, when the rectified voltage has passed a predetermined time and the charging of the capacitor C1 is completed as shown in FIG. 4, the capacitor C1 discharges the charged voltage. Since the light emitting device of the photo coupler (PC1) is driven to turn on the light receiving device connected to the switching circuit (a), the discharge voltage is applied to the switching circuit (a) through the light receiving device As shown in FIG. 4, the switching circuit A maintains the voltage through the coil L of the switching circuit A to the secondary transformer TRANS.
이상에서 설명한 바와같이 본 고안은 스위칭모드 전원공급기에 있어서,As described above, the present invention provides a switching mode power supply.
초기 구동시, 입력되는 전원전압이 정류되고 이 정류된 전압이 콘덴서에 충전이 완료될 때 까지 스위칭회로가 동작하지 않도록 함으로써,In the initial driving, the input power supply voltage is rectified and the switching circuit does not operate until the rectified voltage is completed charging.
상기 콘덴서 충전시에 스위칭회로의 동작으로 인하여 야기되는 소음을 제거할 수 있는 효과를 제공하게 되는 것이다.The charging of the capacitor is to provide an effect that can eliminate the noise caused by the operation of the switching circuit.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019940004489U KR970002432Y1 (en) | 1994-03-08 | 1994-03-08 | Switching mode power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019940004489U KR970002432Y1 (en) | 1994-03-08 | 1994-03-08 | Switching mode power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR950028826U KR950028826U (en) | 1995-10-20 |
| KR970002432Y1 true KR970002432Y1 (en) | 1997-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019940004489U KR970002432Y1 (en) | 1994-03-08 | 1994-03-08 | Switching mode power supply |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR970002432Y1 (en) |
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1994
- 1994-03-08 KR KR2019940004489U patent/KR970002432Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR950028826U (en) | 1995-10-20 |
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