CN1722928B - Soft start high power DC light source - Google Patents
Soft start high power DC light source Download PDFInfo
- Publication number
- CN1722928B CN1722928B CN 200510026582 CN200510026582A CN1722928B CN 1722928 B CN1722928 B CN 1722928B CN 200510026582 CN200510026582 CN 200510026582 CN 200510026582 A CN200510026582 A CN 200510026582A CN 1722928 B CN1722928 B CN 1722928B
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- resistance
- current
- electric capacity
- bridge rectifier
- capacitor
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- 239000003990 capacitor Substances 0.000 claims abstract description 43
- AEEAZFQPYUMBPY-UHFFFAOYSA-N [I].[W] Chemical compound [I].[W] AEEAZFQPYUMBPY-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000004065 semiconductor Substances 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000007600 charging Methods 0.000 abstract description 17
- 229910052721 tungsten Inorganic materials 0.000 abstract description 2
- 239000010937 tungsten Substances 0.000 abstract description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002964 excitative effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
一种软启动大功率直流光源，由碘钨灯(1)和电源部分组成，电源部分包含桥式整流器(2)、π形滤波电路(3)和5伏低压电源(6)，π形滤波电路(3)由第一电容(C1)、第六电阻(R6)和第二电容(C2)组成，桥式整流器(2)的两个输入端与220V市电网连接，桥式整流器(2)的正输出端与第一电容(C1)的正端连接，第六电阻(R6)跨接在第一电容(C1)的正端和第二电容(C2)的正端之间，第一电容(C1)的负端与第二电容(C2)的负端连接，碘钨灯(1)跨接在第二电容(C2)的正端和负端之间，其特征在于，它还含有限流电阻(4)和延时短路电路(5)，限流电阻(4)跨接在桥式整流器(2)的负输出端和第一电容(C1)的负端之间，延时短路电路(5)的正电源输入端和负电源输入端分别与低压电源(6)的正输出端和负输出端连接，延时短路电路(5)的两个输出端跨接在限流电阻(4)的两端。有能避免大充电电流对桥式整流器(2)的损害和延时高度精密、工作稳定可靠的优点。
A soft-start high-power DC light source, consisting of an iodine-tungsten lamp (1) and a power supply part, the power supply part includes a bridge rectifier (2), a π-shaped filter circuit (3) and a 5-volt low-voltage power supply (6), and the π-shaped filter The circuit (3) is composed of a first capacitor (C 1 ), a sixth resistor (R 6 ) and a second capacitor (C 2 ). The two input terminals of the bridge rectifier (2) are connected to the 220V mains grid. The positive output terminal of (2) is connected to the positive terminal of the first capacitor (C 1 ), and the sixth resistor (R 6 ) is connected across the positive terminal of the first capacitor (C 1 ) and the positive terminal of the second capacitor (C 2 ). Between the terminals, the negative terminal of the first capacitor (C 1 ) is connected to the negative terminal of the second capacitor (C 2 ), and the tungsten lamp (1) is connected between the positive terminal and the negative terminal of the second capacitor (C 2 ). It is characterized in that it also contains a current-limiting resistor (4) and a delay short-circuit circuit (5), and the current-limiting resistor (4) is connected across the negative output terminal of the bridge rectifier (2) and the first capacitor (C 1 ), the positive power supply input terminal and the negative power supply input terminal of the delay short-circuit circuit (5) are respectively connected with the positive output terminal and the negative output terminal of the low-voltage power supply (6), and the two delay short-circuit circuit (5) The first output terminal is connected across the two ends of the current limiting resistor (4). The invention has the advantages of avoiding damage to the bridge rectifier (2) by a large charging current, highly precise time delay, and stable and reliable operation.
Description
Technical field
The present invention relates to a kind of soft-startup large power DC light source, definitely say, relate to a kind of use soft-startup large power DC light source 220 volts of civil powers, that be output as direct current light, belong to the technical field of large power DC light source.
Background technology
At present, directly use the general output AC light of light source of civil power, light intensity changes at any time.Another kind of common light source can not provide the illumination that continues high-power and high-luminance by battery or small-power DC power supply.In the occasion that needs the large power DC light source illumination, above light source all can not be satisfied the demand.
Summary of the invention
Can not provide the deficiency that continues the high power DC optical illumination for overcoming existing light source, the purpose of this invention is to provide a kind of soft-startup large power DC light source.This DC light source has the advantage of using 220 volts of civil powers, soft start, output high power DC light.
The present invention realizes that the technical scheme that above-mentioned purpose adopts is: a kind of soft-startup large power DC light source, form by iodine-tungsten lamp 1 and power unit, power unit comprises bridge rectifier 2, π shape filter circuit 3 and 5 volts of low-tension supplies 6, and π shape filter circuit 3 is by first capacitor C
1, the 6th resistance R
6With second capacitor C
2Form, two inputs of bridge rectifier 2 are connected the positive output end of bridge rectifier 2 and first capacitor C with 220V city electrical network
1Anode connect the 6th resistance R
6Be connected across first capacitor C
1The anode and second capacitor C
2Anode between, first capacitor C
1The negative terminal and second capacitor C
2Negative terminal connect, iodine-tungsten lamp 1 is connected across second capacitor C
2Anode and negative terminal between, it is characterized in that it also contains current-limiting resistance 4 and time-delay short circuit current 5, current-limiting resistance 4 is connected across the negative output terminal and first capacitor C of bridge rectifier 2
1Negative terminal between, the positive supply input of time-delay short circuit current 5 is connected with negative output terminal with the positive output end of 5 volts low-tension supplies 6 respectively with the negative supply input, two outputs of the short circuit current 5 of delaying time are connected across the two ends of current-limiting resistance 4.
Owing to need bigger power during iodine-tungsten lamp 1 work, π shape filter circuit 3 needs to adopt very big filter capacitor (first capacitor C of capacitance
1With second capacitor C
2).Directly obtain power supply by π shape filter circuit 3 as iodine-tungsten lamp 1, promptly the resistance of current-limiting resistance 4 is 0, and so, such large power DC light source starts, and when promptly starting shooting, the charging current of filter capacitor is very big, can cause bridge rectifier 2 to burn because of overcurrent.Must adopt soft starting mode when therefore, large power DC light source starts.In soft-startup large power DC light source of the present invention, π shape filter circuit 3 has the current-limiting resistance 4 of time-delay short circuit current 5 to connect with the two ends cross-over connection.When this DC light source started, time-delay short circuit current 5 opened circuit, and filter capacitor is by current-limiting resistance 4 chargings, and charging current is limited in the safe range by current-limiting resistance 4; After one section time-delay, time-delay short circuit current 5 closures, current-limiting resistance 4 has been filled electric filter capacitor and has continued charging by short circuit, and this moment, charging current was still in safe range; Filter capacitor charging finishes, and iodine-tungsten lamp 1 continues output high power DC light under the power supply of bridge rectifier 2 and π shape filter circuit 3, and meanwhile, bridge rectifier 2 can overcurrent, and bridge rectifier 2 is protected.
Technical scheme of the present invention is further characterized in that time-delay short circuit current 5 is by first resistance R
1, second resistance R
2, the 3rd resistance R
3, the 4th resistance R
4, the 5th resistance R
5, relay R LY, the first diode D
1, the second diode D
2, triode Q
1, metal-oxide-semiconductor Q, voltage comparator U
1And Single Chip Microcomputer (SCM) system MCU composition, relay R LY is the single-pole double throw type relay of DC5V, voltage comparator U
1Model be LM393, the model of Single Chip Microcomputer (SCM) system MCU is AT89C51, first resistance R
1With second resistance R
2Be connected across second capacitor C after the series connection
2Anode and the negative output terminal of bridge rectifier 2 between, first resistance R
1With second resistance R
2Tie point be connected grid g, Chang Kaiduan no and the 3rd resistance R with the common port com of relay R LY
3An end link together the 3rd resistance R
3The other end be connected with the negative output terminal of bridge rectifier 2, an end of source electrode s, current-limiting resistance 4 and the negative output terminal of bridge rectifier 2 link together, the other end and first capacitor C of drain electrode d, current-limiting resistance 4
1Negative terminal link together voltage comparator U
1Anode VCC and ground end GND be connected the negativing ending grounding of 5 volts of low-tension supplies 6, the first diode D respectively with negative terminal with the anode of 5 volts of low-tension supplies 6
1With the second diode D
2Forward be connected across between the anode and normal phase input end A+ of 5 volts of low-tension supplies 6 after the series connection, inverting input A-is connected with the port P2.2 of Single Chip Microcomputer (SCM) system MCU, relay R LY is connected across between the anode and collector electrode c of 5 volts of low-tension supplies 6, emitter e is connected with the negative terminal of 5 volts of low-tension supplies 6, the 5th resistance R
5Be connected across the anode and the voltage comparator U of 5 volts of low-tension supplies 6
1Output terminals A out between, the 4th resistance R
4Be connected across voltage comparator U
1Output terminals A out and base stage b between.
Soft-startup large power DC light source of the present invention starts, and promptly after the start, port P2.2 exports high signal, the voltage of the input signal of normal phase input end A+ is lower than the voltage of the input signal of inverting input A-, output terminals A out output low level signal, base stage b voltage is lower than 0.6V, triode Q
1End, relay R LY is not excitatory, and common port com and normal-closed end nc connect, and grid g-source electrode s voltage is 0V, and metal-oxide-semiconductor Q ends, the current-limiting resistance 4 and first capacitor C
1Series connection limits first capacitor C
1The start charging current is to safe range.Behind the time-delay hundreds of millisecond, 5 actions of time-delay short circuit current: port P2.2 output low level signal, the voltage of the input signal of normal phase input end A+ is higher than the voltage of the input signal of inverting input A-, and output terminals A out exports high signal, base stage b voltage is higher than 0.6V, triode Q
1Conducting, relay R LY is excitatory, and common port com and Chang Kaiduan no connect, and grid g-source electrode s voltage is malleation, metal-oxide-semiconductor Q conducting, current-limiting resistance 4 is by short circuit, first capacitor C of part charging
1Continue charging, up to first capacitor C
1Charging is finished, and its charging current is always in safe range.Iodine-tungsten lamp 1 is connected across the two ends of power unit, i.e. second capacitor C
2Two ends, iodine-tungsten lamp 1 continues to export powerful direct current light because of obtaining power supply.Simultaneously, soft starting circuit is limited in the electric current that flows through bridge rectifier 2 in the safe range, thereby bridge rectifier 2 is protected.In addition, the time delayed signal of port P2.2 output is produced by Single Chip Microcomputer (SCM) system MCU, the time-delay high-precision, and the short circuit current 5 of guaranteeing to delay time can be worked reliable and stablely.
Compare with background technology, the invention has the beneficial effects as follows, first capacitor C when soft starting circuit of the present invention has reduced startup
1Charging current, the electric current that flows through bridge rectifier 2 reduces thereupon, has avoided the infringement of big charging current to bridge rectifier 2; The time delayed signal of time-delay short circuit current 5 is provided by Single Chip Microcomputer (SCM) system MCU, and the time-delay high-precision guarantees that DC light source working stability of the present invention is reliable.
Description of drawings
Fig. 1 is the structured flowchart of soft-startup large power DC light source of the present invention.
Fig. 2 is the circuit diagram of soft-startup large power DC light source of the present invention.
Fig. 3 is when not having the large power DC light source startup of current-limiting resistance and time-delay short circuit current, first capacitor C
1With second capacitor C
2Charging current surpass the schematic diagram of safe range.
Fig. 4 is a soft-startup large power DC light source of the present invention when starting, first capacitor C
1With second capacitor C
2The schematic diagram of charging current in safe range.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is further described.
Among Fig. 2, in the frame of broken lines current-limiting resistance 4 and time-delay short circuit current 5.The source electrode s of metal-oxide-semiconductor Q and drain electrode d are two outputs of time-delay short circuit current 5, are connected across the two ends of current-limiting resistance 4.Other circuit connect, and have a detailed description in " summary of the invention ", just seldom give unnecessary details here.
Embodiment
The circuit of present embodiment as shown in Figure 2.Components and parts model or the parameter now enumerating present embodiment and adopted are as follows:
1 500 watts of iodine-tungsten lamps of iodine-tungsten lamp
First resistance R
1150 kilohms, 1/4 watt
Second resistance R
210 kilohms, 1/4 watt
The 3rd resistance R
31 megohm, 1/4 watt
The 4th resistance R
4240 ohm, 1/4 watt
The 5th resistance R
53 kilohms, 1/4 watt
The 6th resistance R
610 ohm of ceramic resistors, 300 watts
4 30 ohm of ceramic resistors of current-limiting resistance, 20 watts
Its model of metal-oxide-semiconductor Q is MTY30N60E
First capacitor C
1100 microfarad electrochemical capacitors, withstand voltage 400 volts
Second capacitor C
21000 microfarad electrochemical capacitors, withstand voltage 400 volts
The first diode D
1Its model is 1N4148
The second diode D
2Its model is 1N4148
Triode Q
1Its model is 9013
In the present embodiment, start again with the current-limiting resistance short circuit, is received the effect that reduces charging current through 200 milliseconds time-delay.See Fig. 4.
Claims (2)
1. a soft-startup large power DC light source is made up of iodine-tungsten lamp (1) and power unit, and power unit comprises bridge rectifier (2), π shape filter circuit (3) and 5 volts of low-tension supplies (6), and π shape filter circuit (3) is by the first electric capacity (C
1), the 6th resistance (R
6) and the second electric capacity (C
2) form, two inputs of bridge rectifier (2) are connected the positive output end of bridge rectifier (2) and the first electric capacity (C with 220V city electrical network
1) anode connect the 6th resistance (R
6) be connected across the first electric capacity (C
1) the anode and the second electric capacity (C
2) anode between, the first electric capacity (C
1) the negative terminal and the second electric capacity (C
2) negative terminal connect, iodine-tungsten lamp (1) is connected across the second electric capacity (C
2) anode and negative terminal between, it is characterized in that, it also contain current-limiting resistance (4) and the time-delay short circuit current (5), current-limiting resistance (4) is connected across the negative output terminal and the first electric capacity (C of bridge rectifier (2)
1) negative terminal between, the positive supply input of time-delay short circuit current (5) is connected with negative output terminal with the positive output end of 5 volts of low-tension supplies (6) respectively with the negative supply input, two outputs of time-delay short circuit current (5) are connected across the two ends of current-limiting resistance (4), and time-delay short circuit current (5) is by the first resistance (R
1), the second resistance (R
2), the 3rd resistance (R
3), the 4th resistance (R
4), the 5th resistance (R
5), relay (RLY), the first diode (D
1), the second diode (D
2), triode (Q
1), metal-oxide-semiconductor (Q), voltage comparator (U
1), and Single Chip Microcomputer (SCM) system (MCU) composition, relay (RLY) is the single-pole double throw type relay of DC5V, voltage comparator (U
1) model be LM393, the model of Single Chip Microcomputer (SCM) system (MCU) is AT89C51, the first resistance (R
1) and the second resistance (R
2) be connected across the second electric capacity (C after the series connection
2) anode and the negative output terminal of bridge rectifier (2) between, the first resistance (R
1) and the second resistance (R
2) tie point be connected grid (g), Chang Kaiduan (no) and the 3rd resistance (R with the common port (com) of relay (RLY)
3) an end link together the 3rd resistance (R
3) the other end be connected with the negative output terminal of bridge rectifier (2), an end of source electrode (s), current-limiting resistance (4) and the negative output terminal of bridge rectifier (2) link together, the other end and the first electric capacity (C of drain electrode (d), current-limiting resistance (4)
1) negative terminal link together voltage comparator (U
1) anode (VCC) and ground end (GND) be connected the negativing ending grounding of 5 volts of low-tension supplies (6), the first diode (D respectively with negative terminal with the anode of 5 volts of low-tension supplies (6)
1) and the second diode (D
2) forward be connected across between the anode and normal phase input end (A+) of 5 volts of low-tension supplies (6) after the series connection, inverting input (A-) is connected with the port P2.2 of Single Chip Microcomputer (SCM) system (MCU), relay (RLY) is connected across between the anode and collector electrode (c) of 5 volts of low-tension supplies (6), emitter (e) is connected with the negative terminal of 5 volts of low-tension supplies (6), the 5th resistance (R
5) be connected across the anode and the voltage comparator (U of 5 volts of low-tension supplies (6)
1) output (Aout) between, the 4th resistance (R
4) be connected across voltage comparator (U
1) output (Aout) and base stage (b) between.
2. soft-startup large power DC light source according to claim 1 is characterized in that, components and parts model or parameter that it adopted are enumerated as follows:
(1) 500 watt of iodine-tungsten lamp of iodine-tungsten lamp
Its model of bridge rectifier (2) is KBPC3510
First resistance (the R
1) 150 kilohms, 1/4 watt
Second resistance (the R
2) 10 kilohms, 1/4 watt
The 3rd resistance (R
3) 1 megohm, 1/4 watt
The 4th resistance (R
4) 240 ohm, 1/4 watt
The 5th resistance (R
5) 3 kilohms, 1/4 watt
The 6th resistance (R
6) 10 ohm of ceramic resistors, 300 watts
(4) 30 ohm of ceramic resistors of current-limiting resistance, 20 watts
Its model of metal-oxide-semiconductor (Q) is MTY30N60E
First electric capacity (the C
1) 100 microfarad electrochemical capacitors, withstand voltage 400 volts
Second electric capacity (the C
2) 1000 microfarad electrochemical capacitors, withstand voltage 400 volts
First diode (the D
1) its model is 1N4148
Second diode (the D
2) its model is 1N4148
Triode (Q
1) its model is 9013
The delay time of time-delay short circuit current (5) is 200 milliseconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510026582 CN1722928B (en) | 2005-06-09 | 2005-06-09 | Soft start high power DC light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510026582 CN1722928B (en) | 2005-06-09 | 2005-06-09 | Soft start high power DC light source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1722928A CN1722928A (en) | 2006-01-18 |
| CN1722928B true CN1722928B (en) | 2010-12-01 |
Family
ID=35912786
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510026582 Expired - Fee Related CN1722928B (en) | 2005-06-09 | 2005-06-09 | Soft start high power DC light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1722928B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751143B (en) * | 2012-07-16 | 2014-12-10 | 苏州工业园区和顺电气股份有限公司 | Control circuit for relay |
| CN102751142A (en) * | 2012-07-16 | 2012-10-24 | 苏州工业园区和顺电气股份有限公司 | Power supply control circuit for relay driving module |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2567911Y (en) * | 2002-08-02 | 2003-08-20 | 韩民 | Filament lamp |
-
2005
- 2005-06-09 CN CN 200510026582 patent/CN1722928B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2567911Y (en) * | 2002-08-02 | 2003-08-20 | 韩民 | Filament lamp |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平9-163742A 1997.06.20 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1722928A (en) | 2006-01-18 |
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Granted publication date: 20101201 Termination date: 20130609 |