CN107070440A - A kind of light-coupled isolation type pulse command power electronic switching circuit - Google Patents
A kind of light-coupled isolation type pulse command power electronic switching circuit Download PDFInfo
- Publication number
- CN107070440A CN107070440A CN201611189336.2A CN201611189336A CN107070440A CN 107070440 A CN107070440 A CN 107070440A CN 201611189336 A CN201611189336 A CN 201611189336A CN 107070440 A CN107070440 A CN 107070440A
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- circuit
- resistance
- command
- shutdown
- transport
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
- H03K17/223—Modifications for ensuring a predetermined initial state when the supply voltage has been applied in field-effect transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
- H03K17/785—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling field-effect transistor switches
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- Electronic Switches (AREA)
- Amplifiers (AREA)
- Relay Circuits (AREA)
Abstract
The invention discloses a kind of light-coupled isolation type pulse command power electronic switching circuit, constituted using photoelectric coupled circuit, discharge circuit and surge current suppression circuit.Photoelectric coupled circuit A input connection start, shutdown pulse command, isolation is used as using optocoupler.Photoelectric coupled circuit A output end connection discharge circuit B；By the instruction that the present invention is received is pulse command, if individually using optocoupler, locking switch machine state is unable to, therefore the present invention maintains state using the transport and placing device for connecting into positive feedback.Discharge circuit B output end connection surge current suppression circuit C, surge current suppression circuit C is the on-off circuit based on the enhanced mosfet transistor of N-channel, act as suppressing surge current and opens the execution circuit of shut-off.It realizes the shut-off of opening under the control of isolated form pulse command using the electronic circuit based on optocoupler, and preferably, magnetic field is insensitive to external world, and on-off times are almost unrestricted for mechanical property.
Description
Technical field
The invention belongs to power electronics field, and in particular to a kind of light-coupled isolation type pulse command power electronic switching electricity
Road.
Background technology
It possesses the function of start and close to the intelligent requirements of electronic equipment, typically by start and close instruction switching electricity
The Switching Power Supply of sub- equipment realizes startup and shutdown.For the interference free performance of equipment, usually require that start and close instruction with
Isolation is realized by the electronic circuit of control electronics.In order to save energy, start and close instruction is typically impulse form, without
It is level form.
The isolated form pulse command startup and shutdown of Switching Power Supply can be realized by electromagnetic relay.Great-power electromagnetic
Relay volume, weight are big；Electromagnetic relay is electromechanical device, and its mechanical property is poor, in the mechanical environment of big magnitude, after
The state of electrical equipment may change；Electromagnetic relay magnetic-field-sensitive to external world；Electromagnetic relay is abrasiveness element, switchs the longevity
Order as 104~107.In addition, the on-off mode of electromagnetic relay is kept using magnetic, if referring under equipment before electricity without hair shutdown
Order, when equipment is next electric, does not send out start-up command, remains as opening state, be likely to result in improper start.
The content of the invention
In view of this, the invention provides a kind of light-coupled isolation type pulse command power electronic switching circuit, it is abandoned
Electromagnetic relay, the transport and placing device lock pulse instruction for connecting into positive feedback is combined using optocoupler, so as to realize locking switch machine shape
State；Compared with the on-off circuit that existing electromagnetic relay is realized, mechanical property of the present invention is preferable, in the mechanical environment of big magnitude
In, state will not change；Magnetic field is insensitive to external world；Electricity under power end is simply entered, regardless of whether hair shutdown command, in next time
When electric on input supply terminal, equipment is necessarily off state.
In order to solve the above technical problems, specific method of the present invention is as follows：
A kind of light-coupled isolation type pulse command power electronic switching circuit, by photoelectric coupled circuit, discharge circuit and surge current
Suppression circuit is constituted；
Photoelectric coupled circuit is made up of start photoelectrical coupler and shutdown photoelectrical coupler, two inputs of photoelectrical coupler of starting shooting
Start-up command main track On+ and start-up command loop line On- is connected respectively, and two inputs of shutdown photoelectrical coupler connect shutdown respectively
Instruct main track Off+ and shutdown command loop line Off-；
Discharge circuit includes being sequentially connected diode D1 and resistance on the transport and placing device N1 for connecting into positive feedback, positive feedback loop
R6；In start photoelectrical coupler three in the colelctor electrode connection transport and placing device N1 of triode inverting input, shutdown photoelectrical coupler
The colelctor electrode connection transport and placing device N1 of pole pipe in-phase input end；Transport and placing device N1 inverting inputs further connect input by resistance R4
Voltage loop line Vin-, and connect by resistance R2 voltage-regulator diode DZ1 negative electrode；Transport and placing device N1 in-phase input ends further pass through electricity
Resistance R5 meets input voltage loop line Vin-, and connects by resistance R3 voltage-regulator diode DZ1 negative electrode；Voltage-regulator diode DZ1 negative electrode
Input voltage main track Vin+ is connect by resistance R1, transport and placing device N1 power end Vcc is also accessed, voltage-regulator diode DZ1 anode connects
Input voltage loop line Vin-；
Surge current suppression circuit is the on-off circuit based on the enhanced mosfet transistor Q1 of N-channel, and MOSFET is brilliant
Body pipe Q1 grid passes through electric capacity C1 connection input voltage loop lines Vin- by resistance R7 connection transport and placing devices N1 output end；
Mosfet transistor Q1 source class connection input voltage loop line Vin-, the output drained as this on-off circuit.
The operation principle of the present invention is as follows：
1. original state：Device power, does not send out start-up command and shutdown command, the inverting input of discharge circuit and same
Phase input terminal voltage is respectively initial value V1a, V2a, V1a ＞ V2a, the output end V3 ≈ 0 of discharge circuit, Inrush current restraining electricity
The switching tube Q1 cut-offs on road (C), equipment is off state；
2. off state turns to opening state：By photoelectric coupled circuit apply pulse start-up command, discharge circuit it is anti-phase defeated
Enter to hold V1 to be reduced to V1b, V1b ≈ 0, the output end V3 of discharge circuit is about power source voltage Vcc, and surge current suppression circuit is opened
Pipe conducting is closed, the power supply of equipment is open-minded, device power-up；The in-phase input end V2 of discharge circuit is due to diode D1's and resistance R6
Positive feedback effect, the in-phase input end V2 of discharge circuit (B), which becomes, turns to V2b, V2b ＞ V2a；Power-on pulse order fulfillment, amplifier
The inverting input V1 of circuit (B) returns to initial value V1a, and now the in-phase input end V2 of discharge circuit (B) is V2b, V2b ＞
V1a, the switching tube locking conducting state of surge current suppression circuit (C), equipment locking opening state；
3. opening state turns to off state：By photoelectric coupled circuit apply pulse shutdown command, discharge circuit it is same mutually defeated
Enter to hold V2 to be reduced to V2c, V2c ≈ 0, the inverting input V1=V1a of discharge circuit, the output end V3 ≈ 0 of discharge circuit, surge
The switching tube shut-off of current suppressing circuit, the power supply shut-off of equipment；Shut down end-of-pulsing, diode D1 and resistance R6 positive feedback
Effect terminates, and the in-phase input end V2 of discharge circuit, which becomes, turns to initial value V2a, now the inverting input V1 of discharge circuit (B)
=V1a, V1a ＞ V2a, the output end V3 ≈ 0 of discharge circuit, MOSFET pipes Q1 maintain cut-off state, equipment locking off state.
Under input supply terminal Vin after electricity, again during upper electricity, the present invention is in original state, the inverting input of discharge circuit and same phase
Input terminal voltage is respectively initial value V1a, V2a, V1a ＞ V2a, the output end V3 ≈ 0 of discharge circuit, surge current suppression circuit
(C) switching tube Q1 cut-offs, equipment is still within off state.
Compared with the prior art, the invention has the advantages that：
(1) due to using the switch based on electronic circuit, and electromechanical device is not based on, the switch of such as relay, this
Preferably, in the mechanical environment of big magnitude, state will not change invention mechanical property；Magnetic field is insensitive to external world, on-off times
It is almost unrestricted；
(2) due to no longer " remembering " state in the past after electronic circuit switch circuit breaking, no matter electricity under power end is simply entered
Whether shutdown command is sent out, when electric on next input supply terminal, the certain off state for being in original state of switch of the invention,
Equipment is necessarily off state.
Brief description of the drawings
Fig. 1 is composition schematic diagram of the invention.
Embodiment
Illustrate embodiments of the invention below with reference to accompanying drawings.
The invention provides a kind of light-coupled isolation type pulse command power electronic switching circuit.As shown in figure 1, the switch is electric
Photoelectric coupled circuit A, discharge circuit B and surge current suppression circuit C is route to constitute.Photoelectric coupled circuit A input connection start, shutdown
Pulse command, isolation is used as using optocoupler.Photoelectric coupled circuit A output end connection discharge circuit B；By the present invention is received
Instruction be pulse command, if individually using optocoupler, be unable to locking switch machine state, therefore the present invention is using connecting into just
The transport and placing device of feedback maintains state.Discharge circuit B output end connection surge current suppression circuit C, surge current suppression circuit C
It is the on-off circuit based on the enhanced mosfet transistor of N-channel, act as suppressing surge current and open shut-off performs electricity
Road.
It can be seen that, the present invention has abandoned electromagnetic relay, it is to avoid use a series of problems of electromagnetic relay.
The present invention's implements circuit refering to Fig. 1, input voltage main track Vin+ connection resistance R1 one end；Resistance R1's
The power supply that other end connects voltage-regulator diode DZ1 negative electrode, resistance R2 one end, resistance R3 one end and amplifier N1 draws
Pin Vcc；Voltage-regulator diode DZ1 anode connection input voltage loop line Vin-；The one of resistance R2 other end connection resistance R4
The colelctor electrode of the triode at end, amplifier N1 inverting input and photoelectrical coupler U1；Resistance R4 other end connects input electricity
Push back line Vin-；Resistance R3 other end connection resistance R5 one end, amplifier N1 in-phase input end and photoelectrical coupler U2
The colelctor electrode of triode, resistance R6 one end；Resistance R5 other end meets input voltage loop line Vin-；Resistance R6's is another
End connection diode D1 negative electrode；Diode D1 anode connection amplifier N1 output end, resistance R7 one end；Resistance R7's is another
One end connection electric capacity C1 one end, Inrush current restraining MOSFET pipes Q1 grid；Inrush current restraining MOSFET pipes Q1 source
Pole meets input voltage loop line Vin-；Device power supply (DPS) circuit outside MOSFET pipes Q1 drain electrode connection；Input voltage loop line Vin-
The power supply loop line for connecting the emitter-base bandgap grading, the emitter-base bandgap grading of photoelectrical coupler U2 triode and amplifier N1 of photoelectrical coupler U1 triode draws
Pin Gnd；The anode tap of start-up command main track On+ connection photoelectrical couplers U1 diode；Start-up command loop line On- connection photoelectricity
The cathode terminal of coupler U1 diode；The anode tap of shutdown command main track Off+ connection photoelectrical couplers U2 diode；Close
The cathode terminal of machine instruction loop line Off- connection photoelectrical couplers U2 diode.
Equipment is realized in opening shut-off work：
1. original state：V1 is initial value V1a, and V2 is initial value V2a, V1a ＞ V2a, V3 ≈ 0, and MOSFET pipes Q1 ends,
Equipment is off state；
2. off state turns to opening state：Apply pulse start-up command, V1 is reduced to V1b, V1b ≈ 0, V3 ≈ Vcc,
MOSFET pipes Q1 is turned on, power supply start；V2 is due to diode D1 and resistance R6 positive feedback effect, and V2, which becomes, turns to V2b, V2b ＞
V2a；Power-on pulse order fulfillment, V1 returns to initial value V1a, and now V2 is V2b, and V2b ＞ V1a, MOSFET pipes Q1 remains open-minded
State, equipment maintains opening state；
3. opening state turns to off state：Apply pulse shutdown command, V2 is reduced to V2c, V2c ≈ 0, V1=V1a, V3
≈ 0, MOSFET pipe Q1 are turned off, input voltage shut-off, equipment shutdown；Shutdown end-of-pulsing, diode D1 and resistance R6's is positive and negative
Feedback effect terminates, and V2, which becomes, turns to initial value V2a, now V1=V1a, and V1a ＞ V2a, V3 ≈ 0, MOSFET pipes Q1 maintains cut-off shape
State, equipment maintains off state.
In a word, off state of the present invention relies on the comparison of discharge circuit, exports low level, closes surge current suppression circuit
Switching tube.Opening state exports high level, opens the switching tube of surge current suppression circuit in the presence of start-up command,
After pulse command terminates, opening state is locked by the positive feedback of amplifier.Off state excites discharge circuit by shutdown command,
The switching tube of surge current suppression circuit is closed, off state is returned to and locks off state.
In summary, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., should be included in the present invention's
Within protection domain.
Claims (1)
1. a kind of light-coupled isolation type pulse command power electronic switching circuit, it is characterised in that by photoelectric coupled circuit (A), amplifier electricity
Road (B) and surge current suppression circuit (C) are constituted；
Photoelectric coupled circuit (A) is made up of start photoelectrical coupler and shutdown photoelectrical coupler, two inputs of photoelectrical coupler of starting shooting
Start-up command main track On+ and start-up command loop line On- is connected respectively, and two inputs of shutdown photoelectrical coupler connect shutdown respectively
Instruct main track Off+ and shutdown command loop line Off-；Start-up command and shutdown command are pulse command；
Discharge circuit (B) includes being sequentially connected diode D1 and resistance on the transport and placing device N1 for connecting into positive feedback, positive feedback loop
R6；In start photoelectrical coupler three in the colelctor electrode connection transport and placing device N1 of triode inverting input, shutdown photoelectrical coupler
The colelctor electrode connection transport and placing device N1 of pole pipe in-phase input end；Transport and placing device N1 inverting inputs further connect input by resistance R4
Voltage loop line Vin-, and connect by resistance R2 voltage-regulator diode DZ1 negative electrode；Transport and placing device N1 in-phase input ends further pass through electricity
Resistance R5 meets input voltage loop line Vin-, and connects by resistance R3 voltage-regulator diode DZ1 negative electrode；Voltage-regulator diode DZ1 negative electrode
The power end Vcc that input voltage main track Vin+ also accesses transport and placing device N1 is connect by resistance R1, voltage-regulator diode DZ1 anode connects defeated
Enter voltage loop line Vin-；
Surge current suppression circuit (C) is the on-off circuit based on the enhanced mosfet transistor Q1 of N-channel, MOSFET crystal
Pipe Q1 grid passes through electric capacity C1 connection input voltage loop lines Vin- by resistance R7 connection transport and placing devices N1 output end；
Mosfet transistor Q1 source electrode connection input voltage loop line Vin-, the output drained as this on-off circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611189336.2A CN107070440B (en) | 2016-12-21 | 2016-12-21 | Optical coupling isolation type pulse instruction power electronic switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611189336.2A CN107070440B (en) | 2016-12-21 | 2016-12-21 | Optical coupling isolation type pulse instruction power electronic switch circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107070440A true CN107070440A (en) | 2017-08-18 |
| CN107070440B CN107070440B (en) | 2020-07-07 |
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ID=59618764
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611189336.2A Active CN107070440B (en) | 2016-12-21 | 2016-12-21 | Optical coupling isolation type pulse instruction power electronic switch circuit |
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| Country | Link |
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| CN (1) | CN107070440B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230436A (en) * | 2019-05-23 | 2019-09-13 | 南京理工大学 | A kind of control and telemetric circuit applied to cube star separator |
| CN111525916A (en) * | 2020-06-04 | 2020-08-11 | 中国工程物理研究院总体工程研究所 | Pulse control switch assembly suitable for underwater unmanned underwater vehicle and control method thereof |
| CN112865775A (en) * | 2021-01-07 | 2021-05-28 | 中国电子科技集团公司第四十三研究所 | Remote control startup and shutdown circuit |
| CN113991610A (en) * | 2021-10-28 | 2022-01-28 | 北京卫星制造厂有限公司 | Power on/off enabling and under-voltage locking device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103427806A (en) * | 2012-05-16 | 2013-12-04 | 浙江科跃焊接设备有限公司 | Voltage comparator with signal locking function |
| CN104635581A (en) * | 2015-01-12 | 2015-05-20 | 北京联合大学 | Single-chip microprocessor-controlled hysteresis voltage comparator |
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2016
- 2016-12-21 CN CN201611189336.2A patent/CN107070440B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427806A (en) * | 2012-05-16 | 2013-12-04 | 浙江科跃焊接设备有限公司 | Voltage comparator with signal locking function |
| CN104635581A (en) * | 2015-01-12 | 2015-05-20 | 北京联合大学 | Single-chip microprocessor-controlled hysteresis voltage comparator |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110230436A (en) * | 2019-05-23 | 2019-09-13 | 南京理工大学 | A kind of control and telemetric circuit applied to cube star separator |
| CN111525916A (en) * | 2020-06-04 | 2020-08-11 | 中国工程物理研究院总体工程研究所 | Pulse control switch assembly suitable for underwater unmanned underwater vehicle and control method thereof |
| CN112865775A (en) * | 2021-01-07 | 2021-05-28 | 中国电子科技集团公司第四十三研究所 | Remote control startup and shutdown circuit |
| CN113991610A (en) * | 2021-10-28 | 2022-01-28 | 北京卫星制造厂有限公司 | Power on/off enabling and under-voltage locking device |
| WO2023071495A1 (en) * | 2021-10-28 | 2023-05-04 | 北京卫星制造厂有限公司 | Power-on/off enabling and undervoltage locking circuit for satellite-borne power supply |
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| Publication number | Publication date |
|---|---|
| CN107070440B (en) | 2020-07-07 |
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