CN1056781A - The automatic control circuit of controllable silicon high-power DC power supply - Google Patents
The automatic control circuit of controllable silicon high-power DC power supply Download PDFInfo
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- CN1056781A CN1056781A CN 91103107 CN91103107A CN1056781A CN 1056781 A CN1056781 A CN 1056781A CN 91103107 CN91103107 CN 91103107 CN 91103107 A CN91103107 A CN 91103107A CN 1056781 A CN1056781 A CN 1056781A
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- circuit
- power supply
- voltage
- power
- automatic control
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Abstract
The present invention relates to a kind of automatic control circuit of high-power DC power supply, major loop adopts silicon controlled rectifier and is provided with the auxiliary circuit of dependable performance, the DC power supply that can be used for electrolysis, charging and other power consumption equipment is specially adapted to produce the power supply of javelle water and lead acid accumulator automatic charger.Owing in SCR control utmost point loop, increased adjustment resistance, the relay control point is connected on the anode of ammeter, improved the operational reliability of complete machine; Because the change with resistance, electric capacity connected mode of buzzer and luminous tube, load current is little when making warning, luminous tube glistens, eye-catching etc.
Description
The present invention relates to a kind of automatic control circuit of high-power DC power supply, major loop adopts silicon controlled rectifier, and be provided with the auxiliary circuit of dependable performance, can be widely used in the DC power supply of electrolysis, charging and other power consumption equipment, be specially adapted to produce the power supply of javelle water and lead acid accumulator automatic charger.
All be provided with power transformer in the high-power DC power supply of prior art; adopt full-wave rectification, filtering etc.; circuit is comparatively complicated; and the way that protective circuit adopts the jumping machine to cut off general supply reaches the purpose of power-off protection; because of cutting off general supply; so should adopt large-scale relay, thereby complete machine cost height, heaviness, transformer heating reduce overall efficiency, causes continuous operation to be restricted.As number of patent application is that 88206441.X comes to this, so only be applicable to the power supply that power is little.And 88214734.X has adopted traditional double reverse-stars type silicon controlled rectifier, is provided with six controllable silicons the former side of transformer and carries out pressure regulation, circuit complexity, heaviness, cost height.
For overcoming the as above shortcoming of circuit, the inventor has developed a kind of without transformer realization large-power AC-DC power converting circuit, declare patent to Patent Office the beginning of the year, number of patent application is 91100723.7, but through the practice of recent months, find following shortcoming: 1, controllable silicon is fragile.2, utilize capacitance decompression in the timing circuit, to the power requirement height of voltage-stabiliser tube, voltage-stabiliser tube is fragile, causes the complete machine functional reliability not high.3, the main electric elements poor heat stability that adopts in the soft-start circuit causes the main circuit power poor stability, adjusts inconvenience, and 4, in the overvoltage, short-circuit protection circuit, power supply is obtained ± 12V by the resistance step-down, not only heating.And volume is big.Because it is unstable that J2-2 is connected on the control of ammeter negative terminal, primary circuit always is in alarm condition when start in addition, during sound and light alarm, buzzer and luminous tube link with+12V respectively, and its shortcoming is: load current is big when 1. reporting to the police, 2. light-emitting diode is bright continuously, does not glisten, and is not eye-catching.
The objective of the invention is at above-mentioned defective, do further to improve.It is reliable to provide a kind of complete machine power controlling to improve, and simple to operate, volume is little, the automatic control circuit of lightweight high-power DC power supply.
Realize that the measure that above-mentioned purpose is taked is: the auxiliary circuit that dependable performance is set in circuit.
Fig. 1 is a calcspar of the present invention;
Fig. 2 is the basic circuit diagram of trigger, synchro source and soft-start circuit;
Fig. 3 is the basic circuit diagram of timing circuit;
Fig. 4 is the basic circuit diagram of bipolar power supply;
Fig. 5 is the basic circuit diagram of overcurrent and short-circuit protection circuit;
Fig. 6 is a silicon controlled rectifier major loop basic circuit diagram;
Fig. 7 is an embodiment circuit diagram of producing javelle water.
Below in conjunction with accompanying drawing formation of the present invention and embodiment are further described:
This circuit is mainly by synchro source, trigger, the half-wave silicon controlled rectifier, and soft-start circuit, timing circuit, overcurrent and short-circuit protection circuit are formed.
1, referring to Fig. 2, trigger is by BG
2And R
2, R
3, R
4, R
5, W
1, C
2And, D
3Form; Its synchro source is by R
9, D
1And DW
1Form, trigger produced and the synchronous phase-shift pulse of major loop, directly by single-phase power electricity 220V through R
9Step-down, diode D
1Rectification, voltage-stabiliser tube DW
1Shaping obtains:
Soft-start circuit is by BG
1, R
4, R
6, R
7, R
8, R
10, D
2, DW
2And C
3Form.The moment of energized, C
3Last voltage is zero, BG
1The source is in cut-off state, and the trigger no pulse is exported, and thyristor operating angle is zero, along with C
3On voltage constantly increase BG
1By reaching capacity at last by the end of conducting, trigger progressively reaches a certain definite oscillatory regime, and controllable silicon also just has a certain definite angle of flow, and major loop is started working, regulator potentiometer W
1Can regulate output current and voltage continuously.The setting of soft-start circuit can be avoided damaging the electric current gauge outfit because of careless manipulation causes rush of current to cause.Its key is BG
1Selection, now select 3CX series for use, because of its penetrating current is little, and temperature coefficient is low, the circuit Heat stability is good, then main circuit current stability is high, and adjusts easily.
2, major loop is the controllable silicon half-wave rectifying circuit, referring to Fig. 6: R
1, C
1For silicon controlled rectifier voltage absorbs circuit, cancelled heavy transformer, directly adjust resistance R by the pulse process of trigger output by single-phase power electricity
29Be input to the silicon controlled control utmost point, control the silicon controlled angle of flow again, certain electric current and the voltage of output behind silicon controlled rectifier.R
1, C
1The effect of voltage absorpting circuit is to prevent that controllable silicon moment overvoltage is breakdown.
Even because the product of the same producer of silicon controlled trigger current also may be inconsistent.And trigger current is excessive, and control very easily damages, and the controllable silicon heating; And trigger current is too small, and then controllable silicon can not conducting, or Current Regulation is not steady.For eliminating above drawback, must adjust silicon controlled trigger current, promptly in SCR control utmost point loop, be provided with the adjustment resistance R
29
3, timing circuit adopts R
30Step-down is referring to Fig. 3.
By the time-base circuit ic chip
1, C
4, C
5, C
6, DW
3, D
4, D
5, D
6, R
11, R
12, R
13, R
30, W
2, J
1Form.Its DC power supply is directly by R
30, DW
3, D
4, C
6Obtain, power-on regularly begins, and power supply passes through R
12, W
2To C
5Charging, A point current potential U during beginning
ABe electronegative potential, IC
1Output B point be high potential, at this moment relay is failure to actuate, D
6Bright, Displaying timer carries out, and works as C
5On current potential raise gradually and make V
ADuring=2/3Vcc, IC
1Overturn, the B point becomes low unit, D
6Go out J
1Action, its contact J
1Disconnect the silicon controlled input pulse, make not conducting of major loop (referring to Fig. 6).Length regularly is by regulating W
2Determine that wherein key is C
5And R
30, we selected withstand voltage high electrochemical capacitor for use so that leak electricity little, through the actual measurement, the timing accuracy of this timing circuit is, regularly 1 hour, error satisfied instructions for use fully in 2 minutes, former timing circuit adopts capacitance decompression to obtain 12V voltage, but this class circuit is to the power requirement height of voltage-stabiliser tube, and circuital current is big more, and problem is outstanding more, cause circuit reliability poor, so adopt R
30Step-down, rectification again, filtering, voltage stabilizing and obtain stable 12V voltage.
4, overcurrent and short-circuit protection circuit, referring to Fig. 4, Fig. 5.
When major loop generation overcurrent or short circuit, be used for avoiding circuit or electric current gauge outfit to be damaged.By bipolar power supply, sample resistance, operational amplifier and reverse circuit are formed, because the operating current of equipment is that the 0-25 peace is adjustable continuously, is difficult to be provided with in major loop sample resistance, the present invention utilizes the shunt FL of ammeter as sample resistance dexterously, referring to Fig. 5 and Fig. 7, because the voltage signal on the FL is very faint, even the electric current of 30A also has only the voltage of 75mv on it, for this reason, select operational amplifier IC for use
2Signal on the FL is amplified, input to then by operational amplifier IC
3Overcurrent and the short-circuit protection circuit formed generally, are regulated W
3Make IC
3Output voltage is-12V D
8Bright (green), BG
3End J
2Be failure to actuate.When overcurrent or short circuit, IC
3State turnover, and output+12V, D
8Go out BG
3Conducting, J
2SCR control polar circuit and electric current gauge outfit are then cut off in action, send the sound and light alarm signal simultaneously, D
9Bright (red), FM sends chimes of doom, and circuit is carried out general protection.Because D
7Alarm self-locking; so after cutting off major loop; still keep sound and light alarm; after pending fault is got rid of; click reset switch S circuit state is overturn, can continue to enter running status, and adopt NE555 in the past as reverse circuit; protecting for it is overturn under predetermined main circuit current, is to adopt to regulate operational amplifier IC
2Gain reaches, and the sensitivity of control circuit is reduced.IC among the present invention
2Inverting input be connected to reference potential, pass through R by+12V
18, DW
7, R
19, W
3Produce,, reach change IC by adjusting reference potential
2The purpose of output voltage, and its gain immobilizes, thereby the sensitivity of control circuit remains unchanged.
Adopt operational amplifier IC
3(741) as overcurrent, short-circuit protection circuit, it is connected into voltage comparator, when overcurrent or short circuit, state turnover makes relay jump organizational security and protects D
7Self-locking is also kept J
2Conducting keeps alarm signal.
The present invention is dexterously buzzer FM and luminous tube D
9With R
26, C
12The shunt circuit is in series: make the little 2. luminous tube of load current D when 1. reporting to the police
9Flash of light, more eye-catching.
The present invention is with relay J
2-2The control point is connected on the anode of ammeter, so that control stabilization is reliable.In overcurrent and the short-circuit protection circuit; past ± acquisition of 12V voltage is to adopt the way of resistance step-down and obtain; its shortcoming is; because of adopting power resistor; not only heating but also volume are big, and be contradictory with the volume that reduces complete machine, for this reason; the present invention adopts the two 15V transformers of 3W, obtains ± 12V voltage through over commutation, filtering, voltage stabilizing.After improving like this, circuit is simple, and no heater element is reliable.Fig. 7 is a hypochlorite generator embodiment basic circuit diagram, and it is made up of each element circuit as mentioned above, its electrical property and principle as above-mentioned, the model or the parameter of main components and parts are seen attached list in the circuit.
Advantage of the present invention:
1, in the major loop, owing in SCR control utmost point loop, increased adjusting resistance R29, to guarantee that controllable silicon moves in the best condition, improved the reliable property of complete machine.
2, original J
2-2The control point is the negative terminal that is connected on the electric current gauge outfit, and practice shows that control is stable inadequately, and the anode problem of now changing into ammeter is solved preferably, and control stabilization is reliable.
3, original sound light alarming circuit is that buzzer and luminous tube are connected on respectively+12V, its shortcoming be 1. loss current greatly 2. luminous tube do not glisten, existing cleverly buzzer FM and luminous tube D
9With R
26, C
12The shunt circuit is in series, and load current is little when making warning, and the luminous tube flash of light is eye-catching.
4, the power supply of timing circuit changes the resistance step-down into, reduces the requirement to voltage-stabiliser tube, makes circuit reliable.
5, overcurrent, short-circuit protection circuit are used two 741 operational amplifiers instead, and adopt the diode self-locking, have improved control sensitivity and reliability.
Claims (4)
1, the automatic control circuit of controllable silicon high-power DC power supply, by synchro source, trigger, soft-start circuit, half-wave silicon controlled rectifier, timing circuit, overcurrent and short-circuit protection circuit are formed:
(1) synchro source 220V power supply is through R
9Step-down, D
1Rectification, DW
1Voltage stabilizing and obtaining,
(2) trigger is by BG
2, R
2, R
3, R
4, R
5, W
1, C
2And D
3Form, in flip-flop circuit, be provided with soft-start circuit: by BG
1, R
6, R
7, R
8, R
10, D
2, DW
2And C
3Form,
(3) major loop (half-wave silicon controlled rectifier) is by controllable silicon SCR, voltage absorpting circuit R
1, C
1And ammeter (A) formation,
(4) overcurrent and short-circuit protection circuit are by bipolar power supply, sample resistance (FL) operational amplifier (IC
2), reverse circuit (IC
3) form,
It is characterized in that,
(1) is provided with the adjustment resistance R in the SCR control utmost point loop
29,
(2) in overcurrent and the short-circuit protection circuit: operational amplifier (IC
2) inverting input added by+12V and passed through R
18, DW
7, R
19, W
3The reference potential that produces; Reverse circuit (IC
3) adopt operational amplifier to make comparator, diode D
7Constitute latching circuit,
(3) relay J
2-2The control point is connected on the anode of ammeter (A).
2, by the said automatic control circuit of claim 1, it is characterized in that the BG in the soft-start circuit
1Selected 3CX series for use, to guarantee the high stability of main circuit current.
By claim 1 and 2 said automatic control circuits, it is characterized in that 3, timing circuit adopts resistance R
30Step-down is so that the unlikely damage of voltage-stabiliser tube.
4, by the said automatic control circuit of claim 3, it is characterized in that bipolar power supply is by the two 15V transformer step-downs of 3W, obtain ± 12V voltage through over commutation, filtering, voltage stabilizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103107 CN1056781A (en) | 1991-05-18 | 1991-05-18 | The automatic control circuit of controllable silicon high-power DC power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103107 CN1056781A (en) | 1991-05-18 | 1991-05-18 | The automatic control circuit of controllable silicon high-power DC power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1056781A true CN1056781A (en) | 1991-12-04 |
Family
ID=4905895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91103107 Pending CN1056781A (en) | 1991-05-18 | 1991-05-18 | The automatic control circuit of controllable silicon high-power DC power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1056781A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989116A (en) * | 2009-07-29 | 2011-03-23 | 鸿富锦精密工业（深圳）有限公司 | Audio coding chip power supply circuit |
-
1991
- 1991-05-18 CN CN 91103107 patent/CN1056781A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989116A (en) * | 2009-07-29 | 2011-03-23 | 鸿富锦精密工业（深圳）有限公司 | Audio coding chip power supply circuit |
| CN101989116B (en) * | 2009-07-29 | 2014-04-23 | 鸿富锦精密工业（深圳）有限公司 | Audio coding chip power supply circuit |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |