CN102307006B - Start-up circuit of high-voltage power supply - Google Patents
Start-up circuit of high-voltage power supply Download PDFInfo
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- CN102307006B CN102307006B CN 201110278599 CN201110278599A CN102307006B CN 102307006 B CN102307006 B CN 102307006B CN 201110278599 CN201110278599 CN 201110278599 CN 201110278599 A CN201110278599 A CN 201110278599A CN 102307006 B CN102307006 B CN 102307006B
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- output
- high voltage
- voltage source
- circuit
- contact
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Abstract
The invention, which belongs to the electronic technology field, relates to a start-up circuit of a high-voltage power supply. The circuit is characterized in that: a BR1 input terminal is connected with an output terminal x of a TA and a leading out terminal p of a J 1-2D of a J1; a BR1 output terminal voltage passes through C1, same-phase input terminal R3, VZ1, R4 and then is applied to a U1 input terminal; a collector of a U1 output terminal is connected with a of a U2 and is also connected with a control power supply Vcc through a R5; an emitting electrode of the U1 output terminal and the Vcc are in ground connection; a reversed-phase input terminal of the U2 and the Vcc are in ground connection through a R7 and the reversed-phase input terminal of the U2 is connected with a contact J1-1D through a R6; a contact J1-1 is connected with the Vcc; anodes of a VD2 and a VD3 are connected through a R1 and a base of a V1; the Vcc is connected with the anodes of the VD2 and the VD3 through a R8; a VD2 cathode is connected with a U2 output terminal; and a VD3 cathode is connected with an output terminal Vcon of a high-voltage power supply control unit, wherein the output terminal Vcon is used for outputting a control signal. Beneficial effects of the start-up circuit provided in the invention are as follows: the start-up circuit is simple and reliable; costs are low; and the design and the manufacture are convenient.
Description
Technical field
The invention belongs to electronic technology field, relate to a kind of power starting circuit, refer to especially be applied to adopt the high voltage source start-up circuit of automatic coupling voltage regulator pressure regulation form.
Background technology
High voltage source has important application at numerous areas, needs according to safety and application, often (as, when related materials is carried out Insulation Test) require high voltage source to have " startup of making zero " function, after namely requiring high voltage source to start, output voltage stabilization is zero or very low, then heightens gradually voltage according to test requirements document.
At present, consider based on aspects such as application scenario, cost, reliabilities, a lot of high voltage sourcies still adopt the form of automatic coupling voltage regulator pressure regulation.The high voltage source of this pressure regulation form is in order to realize the start-up performance that makes zero, and known method has:
The one, take soft-start method.Though when this method can guarantee just to start, the high voltage source output voltage is zero, but owing to there being the human negligence factor, the carbon brush that determines the automatic coupling voltage regulator output voltage before starting may not be in no-voltage or the position of low-voltage very, so after high voltage source starts, output voltage may rise to high voltage (its size is by the carbon brush determining positions of automatic coupling voltage regulator before starting) very soon, can not reliably realize the start-up performance that makes zero of high voltage source.
The 2nd, take upper installation of corresponding site (position of carbon brush when corresponding automatic coupling voltage regulator output voltage is zero or very low) at automatic coupling voltage regulator to have mechanical stroke switch or the push-button switch method of normally opened contact.The method principle as shown in Figure 1, it is the normally opened contact of switch S T to be series at the start-up circuit of high voltage source, be zero or during very low position when the carbon brush of automatic coupling voltage regulator transfers to output voltage, make the normally opened contact of switch S T closed, only have and at this moment press power initiation key SB
2, at the control signal V that comes from the output of high voltage source measurement and control unit
conControl under, relay J
1Two normally opened contact J
1-1HAnd J
1-2H(seeing Fig. 2) closure, the power supply main circuit of connection high voltage source, high voltage source could startup work.Although this method can realize the start-up performance that makes zero of high voltage source, but mechanical travel switch or push-button switch are installed on automatic coupling voltage regulator due to needs designer oneself, so there is inconvenience in reality, difference as because of size, contour structures and the high voltage source controller interior layout of automatic coupling voltage regulator often is subjected to the factor restrictions such as fixing means, locus etc.
Summary of the invention
The objective of the invention is for adopting the high voltage source of automatic coupling voltage regulator pressure regulation form, a kind of novel start-up circuit is provided, it should need not to install travel switch or push-button switch on automatic coupling voltage regulator, and only adopt simple circuit, just only can guarantee that the output voltage at automatic coupling voltage regulator is zero or very low, after power initiation the high voltage source output voltage stabilization be zero or very low situation under, could start high voltage source, can solve the start-up performance that makes zero of high voltage source.
The technical solution used in the present invention is: a kind of high voltage source start-up circuit comprises testing circuit and control circuit, and testing circuit is by full-bridge BR
1, capacitor C
1, voltage stabilizing didoe VZ
1, photoelectrical coupler U
1, operational amplifier U
2, resistance R
3, R
4, R
5, R
6, R
7, working power V
ccEtc. formation, control circuit is by diode VD
1, VD
2, VD
3, triode V
1, SB stops key
1, start button SB
2, relay J
1Actuating coil, J
1The normally opened contact J of one group of contact
1-1HAnd normally-closed contact J
1-1D, resistance R
1, R
2, R
8, working power V
ccEtc. formation.It is characterized in that: BR
1One end of input is connected with the output x of automatic coupling voltage regulator TA, BR
1The other end of input and relay J
1Normally-closed contact J
1-2DExit p be connected, BR
1The positive pole of output and C
1Positive pole, R
3An end be connected, BR
1The negative pole of output and C
1Negative pole, VZ
1Anode and R
4An end be connected, R
3The other end be connected and VZ
1Negative electrode, U
1The anode of input is connected, U
1The negative electrode of input and R
4The other end be connected, U
1The collector electrode of output and U
2In-phase input end be connected, U
1The collector electrode of output is through R
5With working power V
ccBe connected, U
1The emitter of output and V
ccGround be connected, U
2Inverting input through R
7With V
ccGround be connected, U
2Inverting input through R
6With contact J
1-1DBe connected, moving contact J
1-1With V
ccBe connected, VD
2And VD
3Anode through R
1With V
1Base stage is connected, V
ccThrough R
8With VD
2And VD
3Anode be connected, VD
2Negative electrode and U
2Output be connected, VD
3Negative electrode and high voltage source measurement and control unit output control signal V
conOutput be connected.
The guiding theory of technique scheme is: before power initiation, and J
1Normally-closed contact J
1-2DBe closure state, utilize automatic coupling voltage regulator TA output voltage through BR
1, C
1, R
3Deng the direct voltage after rectifying and wave-filtering, control U
1The electric current of input, and then change U
1The voltage of output collector electrode utilizes U
2, R
5, R
6, R
7Comparator Deng consisting of detects U
2The voltage of output collector electrode, and provide corresponding signal.When the output voltage of TA is no-voltage or when very low, U
1The electric current of input is very little, U
1The equivalent resistance of output is very large, makes U
2The voltage of in-phase input end (that is U
1The voltage of output collector electrode) greater than U
2The voltage of inverting input is (by working power V
ccThrough J
1Normally-closed contact J
1-1D, pass through R
6, R
7Set), U
2The output high level signal, U
2High level signal and the V of output
con, through VD
2, VD
3, R
8Consist of with behind the door, be high level signal, at this moment, click power initiation key SB
2, by V
1Drive J
1Work makes J
1-1H, J
1-2HClosure, the main circuit of high voltage source is switched on, and the output voltage of high voltage source is zero or low-voltage very, realizes the startup of making zero of high voltage source; Otherwise, when the output voltage of TA when not being very low, U
2The output low level signal, at this moment, even if press SB
2, due to V
1Base stage be low level, make V
1End, be positioned at the J of high voltage source main circuit
1-2HStill be in off-state, high voltage source is not activated.After high voltage source starts, J
1J
1-1DAnd J
1-2DBecome off-state, U
2The anti-phase input terminal voltage be set to zero, and U
2In-phase input end voltage much larger than zero (because of J
1-2DCut off BR
1Input terminal voltage, make U
1The equivalent resistance of output is very large), so U
2Output, the high level signal when still keeping power initiation in high voltage source work is constant.
Effect of the present invention and benefit are: be comprised of testing circuit and control circuit, it need not to install travel switch or push-button switch on automatic coupling voltage regulator, also need not to change the relay in former start-up circuit, just can guarantee to adopt the high voltage source of automatic coupling voltage regulator pressure regulation form, only the output voltage at automatic coupling voltage regulator is zero or very low, after power initiation the high voltage source output voltage stabilization be zero or very low situation under, could start high voltage source, reliably realize the start-up performance that makes zero of high voltage source.Need not travel switch or push-button switch are installed on automatic coupling voltage regulator, designing and making is convenient.Its circuit is simple, cost is low, reliability is high.
Description of drawings
Fig. 1 is that the high voltage source of automatic coupling voltage regulator pressure regulation form generally adopts the start-up circuit figure with the start-up performance that makes zero at present.
In figure: ST is the travel switch on the corresponding site (corresponding automatic coupling voltage regulator output voltage is zero or very low position) that is fixed in automatic coupling voltage regulator; SB
1Stop key (contact is normally closed) of high voltage source; SB
2It is the startup button (often open the contact) of high voltage source; J
1-1HIt is relay J
1The normally opened contact of one group of contact; J
1-1DIt is relay J
1The normally-closed contact of one group of contact; V
conThe control signal that is taken from the output of high voltage source measurement and control unit, V under normal circumstances
conBe high level, V when the faults such as overcurrent or overvoltage occurring when high voltage source
conBe low level; HR is the indicator light that stops of power supply; HG is the startup indicator light of power supply; V
ccIt is working power.
Fig. 2 is the main circuit sketch that adopts the high voltage source of automatic coupling voltage regulator pressure regulation form.
In figure: TA is automatic coupling voltage regulator, and the input of TA and output are respectively A, X and a, x; J
1-2HAnd J
1-2DRespectively Fig. 1 repeat circuit J
1Another the group contact normally opened contact and normally-closed contact; P is and J
1-2DThe exit that is connected; V
conIt is the control signal of high voltage source measurement and control unit output; HV
outIt is the high pressure of high voltage source output.
Fig. 3 is a kind of high voltage source start-up circuit figure that the present invention provides.
In figure: x is the output x of automatic coupling voltage regulator TA in map interlinking 2; P is J in map interlinking 2
1-2DExit p; U
1It is photoelectrical coupler; U
2Be operational amplifier, device uses as a comparison here; J
1-1H, J
1-1DAnd J
1-1It is respectively relay J
1Normally opened contact, normally-closed contact and the moving contact of one group of contact; HR is the indicator light that stops of power supply; HG is the startup indicator light of power supply; V
ccIt is working power.
Embodiment
Be described in detail specific embodiments of the invention below in conjunction with technical scheme and accompanying drawing.
In a kind of high voltage source start-up circuit that Fig. 3 provides, comprise by full-bridge BR
1, capacitor C
1, voltage stabilizing didoe VZ
1, photoelectrical coupler U
1, operational amplifier U
2, resistance R
3, R
4, R
5, R
6, R
7, working power V
ccDeng the testing circuit that consists of, by diode VD
1, VD
2, VD
3, triode V
1, SB stops key
1, start button SB
2, relay J
1Actuating coil, J
1The normally opened contact J of one group of contact
1-1HAnd normally-closed contact J
1-1D, resistance R
1, R
2, R
8, working power V
ccDeng the control circuit that consists of.BR
1Input respectively with the high voltage source main circuit in output x and the J of automatic coupling voltage regulator TA
1Normally-closed contact J
1-2DExit p be connected, BR
1Output end voltage through C
1, R
3, VZ
1, R
4After, put on U
1Input, J
1Another the group contact normally opened contact J
1-2HBe serially connected between the input of the automatic coupling voltage regulator TA output of high voltage source main circuit and power conversion unit (seeing Fig. 2), the annexation between all the other each elements as shown in Figure 3.
Fig. 3 utilizes the TA output voltage through BR
1, C
1, R
3Deng the direct voltage after rectifying and wave-filtering, control U
1The electric current of input, and then change U
1The equivalent resistance of output and U
1The voltage of output collector electrode utilizes U
2, R
5, R
6, R
7Comparator Deng consisting of detects U
2The voltage of output collector electrode, and provide corresponding signal, this signal and V
conControl together V
1Conducting or cut-off, and pass through J
1Relevant contacts control high voltage source and whether start.
Before high voltage source starts, V
1Cut-off, J
1J
1-1DAnd J
1-2DBe kept closed, power supply to stop indicator light HR bright, start indicator light HG and do not work, V
ccThrough J
1-1DAnd pass through R
6, R
7Dividing potential drop is the U as comparator
2Inverting input is set a certain reference voltage greater than 0V.At this moment, when the output voltage of TA is zero or when very low, U
1The electric current of input is very little, U
1The equivalent resistance of output is very large, makes U
2The voltage of in-phase input end (that is U
1The voltage of output collector electrode) greater than U
2The reference voltage of inverting input, U
2The output high level signal, U
2High level signal and the V of output
con(V under normal circumstances
conBe high level, V when overvoltage or overcurrent appear in power supply
conBe low level), through VD
2, VD
3, R
8Consist of with behind the door, be high level signal, at this moment, click power initiation key SB
2, by V
1Drive J
1Work makes J
1-1H, J
1-2HClosure, the main circuit of high voltage source is switched on, and the output voltage of high voltage source is zero or low-voltage very, has realized the startup of making zero of high voltage source, and the startup indicator light HG of power supply is bright, stops indicator light HR and extinguishes; Otherwise, when the output voltage of TA is not very during low-voltage, U
2The output low level signal, U
2Low level signal and the V of output
con, through VD
2, VD
3, R
8Consist of with behind the door, be low level signal, at this moment, even if press SB
2, due to V
1Base stage be low level, make V
1End, be positioned at the J of high voltage source main circuit
1-2HStill be in off-state, high voltage source is not activated.
After high voltage source starts, J
1J
1-1DAnd J
1-2DBecome off-state, U
2The anti-phase input terminal voltage be set to zero, and U
2In-phase input end voltage much larger than zero (because of J
1-2DCut off BR
1Input terminal voltage, make U
1The equivalent resistance of output is very large), so U
2Output, high level signal when still keeping power initiation in high voltage source work is constant, as long as the faults such as overcurrent or overvoltage do not appear in power supply, the main circuit of high voltage source is switched on all the time, can change the output voltage of high voltage source by the output voltage of regulating TA.
When the fault such as overcurrent or overvoltage occurring when high voltage source, take from the control signal V of high voltage source measurement and control unit output
conBecome low level, make V
1Base stage be low level, V
1Cut-off, J
1Coil lose operating current, J
1-2H, J
1-2HRecover off-state, the main circuit power supply of high voltage source is cut off, and high voltage source quits work.
In Fig. 3, VZ
1, R
3, R
4Play a part voltage stabilizing and current limliting, guaranteed U
1The input electric current in allowing working range; VD
2, VD
3Consist of and door, guarantee only at V
conAnd U
2Output just starts high voltage source when being all high level, when the fault such as overvoltage or overcurrent occurring when power supply, can in time turn-off high voltage source; Operational amplifier U
2Be here that device uses as a comparison, can save the pull-up resistor that general comparator needs.
in conjunction with above-mentioned, a kind of high voltage source start-up circuit that the start-up circuit that the high voltage source of automatic coupling voltage regulator pressure regulation form more shown in Figure 1 generally adopts at present and the present invention shown in Figure 3 provide, as can be known, the high voltage source start-up circuit that the present invention provides, need not to install travel switch or push-button switch on automatic coupling voltage regulator, also need not to change the relay in former start-up circuit, just can guarantee to adopt the high voltage source of automatic coupling voltage regulator pressure regulation form, only the output voltage at automatic coupling voltage regulator is zero or very low, after power initiation the high voltage source output voltage stabilization be zero or very low situation under, could start high voltage source, reliably realize the start-up performance that makes zero of high voltage source.Simultaneously, the high voltage source start-up circuit that the present invention provides, simple and reliable, cost is low, designing and making is convenient.
Claims (1)
1. a high voltage source start-up circuit, comprise testing circuit and control circuit, and testing circuit is by full-bridge rectifier BR
1, capacitor C
1, voltage stabilizing didoe VZ
1, photoelectrical coupler U
1, operational amplifier U
2, resistance
R 3,
R 4,
R 5,
R 6,
R 7Consist of, control circuit is by diode VD
1, VD
2, VD
3, triode V
1, SB stops key
1, start button SB
2, relay J
1Actuating coil, J
1The normally opened contact J of one group of contact
1-1HAnd normally-closed contact J
1-1D, resistance
R 1,
R 2,
R 8Consist of, it is characterized in that: BR
1One end of input is connected with the output x of automatic coupling voltage regulator TA, BR
1The other end of input and relay J
1Normally-closed contact J
1-2DExit p be connected, BR
1The positive pole of output with
C 1Positive pole,
R 3An end be connected, BR
1The negative pole of output with
C 1Negative pole, VZ
1Anode and
R 4An end be connected,
R 3The other end and VZ
1Negative electrode, U
1The anode of input is connected, U
1The negative electrode of input with
R 4The other end be connected, U
1The collector electrode of output and U
2In-phase input end be connected, U
1The collector electrode warp of output
R 5With working power
V ccBe connected, U
1The emitter of output and working power
V ccGround be connected, U
2The inverting input warp
R 7With working power
V ccGround be connected, U
2The inverting input warp
R 6With contact J
1-1DBe connected, moving contact J
1-1With working power
V ccBe connected, VD
2And VD
3The anode warp
R 1With V
1Base stage is connected, working power
V ccWarp
R 8With VD
2And VD
3Anode be connected, VD
2Negative electrode and U
2Output be connected, VD
3Negative electrode and the control signal of high voltage source control unit
V conOutput is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110278599 CN102307006B (en) | 2011-09-20 | 2011-09-20 | Start-up circuit of high-voltage power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110278599 CN102307006B (en) | 2011-09-20 | 2011-09-20 | Start-up circuit of high-voltage power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102307006A CN102307006A (en) | 2012-01-04 |
| CN102307006B true CN102307006B (en) | 2013-06-19 |
Family
ID=45380829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110278599 Expired - Fee Related CN102307006B (en) | 2011-09-20 | 2011-09-20 | Start-up circuit of high-voltage power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102307006B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104980013A (en) * | 2015-07-15 | 2015-10-14 | 常州顶芯半导体技术有限公司 | Time switch AC power circuit |
| CN111650884A (en) * | 2020-05-08 | 2020-09-11 | 纽控(广东)数控技术有限公司 | Monitoring device for power input of numerical control system, monitoring method thereof and storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2729773Y (en) * | 2004-04-08 | 2005-09-28 | 何山 | Voltage stabilizing electric saving apparatus |
| CN201464946U (en) * | 2009-04-28 | 2010-05-12 | 东莞市嘉利五金电器厂 | Zero crossing voltage gear shifting AC voltage regulator for relay |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6614668B2 (en) * | 2002-01-10 | 2003-09-02 | Adc Telecommunications, Inc. | Method and system for limiting in rush current of a power supply filter |
| DE102008031536A1 (en) * | 2008-07-03 | 2010-01-14 | Fujitsu Technology Solutions Gmbh | Circuit arrangement and drive circuit for a power supply, computer power supply and method for switching a power supply |
-
2011
- 2011-09-20 CN CN 201110278599 patent/CN102307006B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2729773Y (en) * | 2004-04-08 | 2005-09-28 | 何山 | Voltage stabilizing electric saving apparatus |
| CN201464946U (en) * | 2009-04-28 | 2010-05-12 | 东莞市嘉利五金电器厂 | Zero crossing voltage gear shifting AC voltage regulator for relay |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102307006A (en) | 2012-01-04 |
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