CN103746547A - Driving circuit of firefighting emergency power supply - Google Patents

Driving circuit of firefighting emergency power supply Download PDF

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Publication number
CN103746547A
CN103746547A CN201410030078.8A CN201410030078A CN103746547A CN 103746547 A CN103746547 A CN 103746547A CN 201410030078 A CN201410030078 A CN 201410030078A CN 103746547 A CN103746547 A CN 103746547A
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China
Prior art keywords
light
coupled isolation
power supply
power
fire
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Pending
Application number
CN201410030078.8A
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Chinese (zh)
Inventor
任宇华
梁军
苏伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SICHUAN GELAI FIRE-FIGHTING ELECTRICAL APPLIANCE EQUIPMENT Co Ltd
Original Assignee
SICHUAN GELAI FIRE-FIGHTING ELECTRICAL APPLIANCE EQUIPMENT Co Ltd
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Application filed by SICHUAN GELAI FIRE-FIGHTING ELECTRICAL APPLIANCE EQUIPMENT Co Ltd filed Critical SICHUAN GELAI FIRE-FIGHTING ELECTRICAL APPLIANCE EQUIPMENT Co Ltd
Priority to CN201410030078.8A priority Critical patent/CN103746547A/en
Publication of CN103746547A publication Critical patent/CN103746547A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a driving circuit of a firefighting emergency power supply, which is used for driving power modules for realizing inverter output of the firefighting emergency power supply. The driving circuit comprises at least four opto-isolator driving modules and at least two power modules, wherein the opto-isolator driving modules are used for receiving driving signals for driving the power modules, each power module comprises two electrically connected power tubes, each power tube is electrically connected with one opto-isolator driving module respectively for enabling the corresponding power tube to be driven by the opto-isolator driving module for realizing inverter output. When the driving circuit is provided with four opto-isolator driving modules and two power modules, the driving circuit of the firefighting emergency power supply is applicable to a single-phase load; when the driving circuit is provided with six opto-isolator driving modules and three power modules, the driving circuit of the firefighting emergency power supply is applicable to a three-phase load. In actual life, the three-phase loads are in the majority, so that the driving circuit provided by the invention can play a good effect.

Description

A kind of drive circuit of fire-fighting emergency power supply
Technical field
The present invention relates to a kind of fire-fighting emergency power supply, relate in particular to a kind of drive circuit driving for fire-fighting emergency power supply power model.
Background technology
At present, fire-fighting emergency power supply we life in occupation of and important effect.But current fire-fighting emergency power supply drive circuit, when power tube being detected and occur over current fault or overvoltage fault, can only be passed to processor by its fault-signal and process, and allows processor make decision, then cuts off all output.Its mode is especially complicated, and when processor goes wrong, will make to detect invalid, causes whole system damage, has greatly increased the maintenance cost of safeguarding fire-fighting emergency power supply.
Summary of the invention
The present invention is directed to the problems referred to above, a kind of drive circuit of novel fire-fighting emergency power supply has been proposed, this drive circuit simplicity of design, driving effect is good, and can be when there is overcurrent-overvoltage situation in power model, cut off in time the optocoupler input that light-coupled isolation drives, namely cut off the original driving signal from the driving power pipe of fire-fighting emergency power supply main controller, avoid fire-fighting emergency power supply system to occur larger fault.
Technical scheme provided by the invention is:
A drive circuit for fire-fighting emergency power supply, it is for driving the power model of realizing described fire-fighting emergency power supply inversion output, and wherein, described drive circuit comprises:
At least four light-coupled isolation driver modules, it receives the driving signal that drives described power model;
At least two power models, each power model includes the power tube of two electrical connections; Wherein,
Each power tube is electrically connected to one of them light-coupled isolation driver module respectively, so that corresponding power model is subject to the driving of light-coupled isolation driver module to realize inversion, exports.
Preferably, described light-coupled isolation driver module comprises:
A light-coupled isolation drives chip, and its first signal input is connected with the main controller of described fire-fighting emergency power supply, and for receiving the primary signal that drives described power tube break-make, its signal output part is electrically connected to described power tube;
The first diode, its negative electrode is connected to the failure output terminal that described light-coupled isolation drives chip, anode drives the secondary signal input of chip to be connected with described main controller, described light-coupled isolation, for detecting for described main controller, cut off the optocoupler input that described light-coupled isolation drives chip when described power tube breaks down simultaneously.
Preferably, described light-coupled isolation driver module also comprises: the switching tube circuit of controlling described power tube break-make; Wherein, described switching tube circuit comprises:
The first resistance, its one end is connected to the signal output part that described optocoupler drives chip;
The first switching tube and second switch pipe, described the first switching tube is connected with the base stage of second switch pipe, and be also connected to the other end of described the first resistance, emitter is connected to respectively the gate pole of described power tube by the second resistance and the 3rd resistance, and collector electrode connects respectively driving power and ground wire.
Preferably, described switching tube circuit also comprises:
The 4th resistance, driving power described in one termination, the other end is connected to the emitter of described power tube;
Zener diode, its anodic bonding is to the emitter of described power tube, and negative electrode is connected to ground wire.
Preferably, described switching tube circuit also comprises:
The first electric capacity and the second electric capacity, wherein, described the first Capacitance parallel connection is at described the 5th resistance two ends, and the second Capacitance parallel connection is at the two ends of described voltage stabilizing didoe.
Preferably, described light-coupled isolation driver module also comprises:
The second diode, the negative electrode of described the second diode is connected to the collector electrode of described power tube;
The 6th resistance, its one end is connected to the anode of described the second diode, and the other end is connected to described light-coupled isolation and drives chip;
The 3rd electric capacity, it is connected between described the 6th other end of resistance and the emitter of described power tube.
Preferably, described light-coupled isolation driver module also comprises: fault cue circuit; Wherein, described fault cue circuit comprises:
Light-emitting diode and with the 7th resistance of the anode series of described light-emitting diode, the negative electrode of described light-emitting diode is connected to the failure output terminal that described light-coupled isolation drives chip, the other end of described the 7th resistance connects high level.
Preferably, described power tube is insulated gate bipolar transistor.
Fire-fighting emergency power supply drive circuit provided by the invention can be when there is overvoltage or overcurrent in power tube, directly cut off the optocoupler input that all light-coupled isolations drive chip, and then cut off the driving signal of all power models, to cut off the inversion output of fire-fighting emergency power supply, although still will send fault-signal to main controller in this process, but also need not respond and cut off output through processor, the performance of equipment is provided greatly.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of one of them power model that the drive circuit of fire-fighting emergency power supply of the present invention is corresponding.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail, to make those skilled in the art can implement according to this with reference to specification word.
For fire-fighting emergency power supply, that it plays the part of in life is the role of stand-by power supply, when civil power breaks down, will start the normal work that fire-fighting emergency power supply carrys out proof load, because no matter be for industrial production or for family, civil power breaks down all can affect normal life.For this reason, the invention provides a kind of drive circuit of fire-fighting emergency power supply, as shown in Figure 1, this drive circuit is the power model (only showing the circuit theory diagrams for one of them power model at Fig. 1) of realizing described fire-fighting emergency power supply inversion output for driving, wherein, described drive circuit comprises: at least four light-coupled isolation driver modules, and it receives the driving signal that drives described power model; At least two power models, each power model includes the power tube of two electrical connections; Wherein, each power tube is electrically connected to one of them light-coupled isolation driver module respectively, so that corresponding power model is subject to the driving of light-coupled isolation driver module to realize inversion, exports.Here, for threephase load, just adopt six light-coupled isolation driver modules and three power models, the corresponding output of each power model is a cross streams electricity wherein, and three power models export the three-phase alternating current that meets threephase load; And for single-phase load, only need to adopt four light-coupled isolation driver modules and two power models, and same, the corresponding output of each power model is a cross streams electricity wherein, and two power models export the alternating current that meets single-phase load.
Specifically, described light-coupled isolation driver module comprises: a light-coupled isolation drives chip op1, its first signal input (reverse signal input Vin-) is connected with the main controller of described fire-fighting emergency power supply, for receiving the primary signal that drives described power tube break-make, its signal output part is electrically connected to described power tube; The first diode D3, its negative electrode is connected to the failure output terminal that described light-coupled isolation drives chip, anode drives the secondary signal input (forward signal input Vin+) of chip to be connected with described main controller, described light-coupled isolation, for detecting for described main controller, cut off the optocoupler input that described light-coupled isolation drives chip when described power tube breaks down simultaneously.The fault here comprises overvoltage fault and over current fault.The principle of this circuit design is: when overvoltage fault and over current fault appear in power tube, will drive in light-coupled isolation the failure output terminal output low level of chip, now diode D3 meeting conducting, it is low will making light-coupled isolation drive the forward signal input level of chip, and according to the internal structure of light-coupled isolation driving chip, will optocoupler input be cut off because forward signal input drags down, the cut-out of optocoupler input will make cannot be sent to power tube below from the driving signal of main controller again, will cut off the inversion output of power model.The drive circuit of the fire-fighting emergency power supply providing in the present invention, all light-coupled isolations drive the forward signal input Vin+ of chip to be all electrically connected, from circuit diagram, can see, under normal circumstances, all light-coupled isolations drive the forward signal input Vin+ of chip to connect high level, if failure output terminal output low level, can drag down Vin+ pin, and then have influence on the optocoupler input that all light-coupled isolations drive chip.
Here, in order to carry out the prompting of fault, the present invention has also designed fault cue circuit when design driven circuit; Wherein, described fault cue circuit comprises: LED 1 and with the 7th resistance R 13 of the anode series of described light-emitting diode, the negative electrode of described light-emitting diode is connected to the failure output terminal of described light-coupled isolation chip, and the other end of described the 7th resistance connects high level (being connected to supply voltage 5V here).
Further, in light-coupled isolation, drive chip to receive after the driving signal from fire-fighting emergency power supply main controller, will be at the corresponding signal that drives of output output, and can normally open and not overvoltage for guaranteed output pipe at output, and reliable turn-off, also designed the switching tube circuit of controlling described power tube break-make; Wherein, described switching tube circuit comprises: the first resistance R 9, and its one end is connected to the signal output part that described optocoupler drives chip; The first switching tube Q1 and second switch pipe Q3, described the first switching tube is connected with the base stage of second switch pipe, and be also connected to the other end of described the first resistance, emitter is connected to respectively the gate pole G1 of described power tube by the second resistance R 7 and the 3rd resistance R 11, collector electrode connects respectively driving power U1 and ground wire.Here U1 is generally 24V, and the effect of R7 is power limitation pipe peak current when opening, the phenomenon of avoiding power tube to there will be overcurrent to puncture; The effect of R11 is the cut-off current of power limitation pipe gate pole, and then prevents that the UCE of whole power tube is excessive.
Preferably, described switching tube circuit also comprises: the 4th resistance R 5, and driving power U1 described in one termination, the other end is connected to the emitter E 1 of described power tube; Zener diode D5, its anodic bonding is to the emitter E 1 of described power tube, and negative electrode is connected to ground wire.Here, the design of R5 and D5 can be when malleation normally the opening and not overvoltage of effective guaranteed output pipe, and when negative pressure effective guaranteed output pipe reliable turn-off.Here, preferably, described switching tube circuit also comprises: the first capacitor C 4 and the second capacitor C 7, and wherein, described the first Capacitance parallel connection is at described the 5th resistance two ends, and the second Capacitance parallel connection is at the two ends of described voltage stabilizing didoe.These two main effects of electric capacity are to carry out filtering.
Preferably, described light-coupled isolation driver module also comprises: the second diode D1, and the negative electrode of described the second diode is connected to the collector electrode c1 of described power tube; The 6th resistance R 3, its one end is connected to the anode of described the second diode D1, and the other end is connected to described optocoupler and drives chip; The 3rd capacitor C 1, it is connected between described the 6th other end of resistance and the emitter of described power tube.Here, resistance R 3 and capacitor C 1 can effectively regulate the duration of overcurrent protection.Preferably, described power tube is insulated gate bipolar transistor, i.e. IGBT pipe.For IGBT pipe, its conducting voltage generally, between 1.6-2.3V, if the phenomenon of overcurrent appears in IGBT pipe, will make its conducting voltage raise, and is exactly to detect by detecting the size of UCE the phenomenon whether IGBT pipe occurs overcurrent in the present invention.
The power model that power model described in the present invention can directly adopt prior art to provide, the concrete electrical connection of its inside belongs to prior art, does not describe in detail here.
Fire-fighting emergency power supply drive circuit of the present invention can cut off in time all output when overvoltage and over-current phenomenon avoidance appear in power tube, need not respond through processor, and the performance of equipment is provided greatly.
Although embodiment of the present invention are open as above, but it is not restricted to listed utilization in specification and execution mode, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other modification, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend of describing.

Claims (8)

1. a drive circuit for fire-fighting emergency power supply, it,, for driving the power model of realizing described fire-fighting emergency power supply inversion output, is characterized in that, described drive circuit comprises:
At least four light-coupled isolation driver modules, it receives the driving signal that drives described power model;
At least two power models, each power model includes the power tube of two electrical connections; Wherein,
Each power tube is electrically connected to one of them light-coupled isolation driver module respectively, so that corresponding power model is subject to the driving of light-coupled isolation driver module to realize inversion, exports.
2. the drive circuit of fire-fighting emergency power supply as claimed in claim 1, is characterized in that, described light-coupled isolation driver module comprises:
A light-coupled isolation drives chip, and its first signal input is connected with the main controller of described fire-fighting emergency power supply, and for receiving the primary signal that drives described power tube break-make, its signal output part is electrically connected to described power tube;
The first diode, its negative electrode is connected to the failure output terminal that described light-coupled isolation drives chip, anode drives the secondary signal input of chip to be connected with described main controller, described light-coupled isolation, for detecting for described main controller, cut off the optocoupler input that described light-coupled isolation drives chip when described power tube breaks down simultaneously.
3. the drive circuit of fire-fighting emergency power supply as claimed in claim 2, is characterized in that, described light-coupled isolation driver module also comprises: the switching tube circuit of controlling described power tube break-make; Wherein,
Described switching tube circuit comprises:
The first resistance, its one end is connected to the signal output part that described light-coupled isolation drives chip;
The first switching tube and second switch pipe, described the first switching tube is connected with the base stage of second switch pipe, and be also connected to the other end of described the first resistance, emitter is connected to respectively the gate pole of described power tube by the second resistance and the 3rd resistance, and collector electrode connects respectively driving power and ground wire.
4. the drive circuit of fire-fighting emergency power supply as claimed in claim 3, is characterized in that, described switching tube circuit also comprises:
The 4th resistance, driving power described in one termination, the other end is connected to the emitter of described power tube;
Zener diode, its anodic bonding is to the emitter of described power tube, and negative electrode is connected to ground wire.
5. the drive circuit of fire-fighting emergency power supply as claimed in claim 4, is characterized in that, described switching tube circuit also comprises:
The first electric capacity and the second electric capacity, wherein, described the first Capacitance parallel connection is at described the 5th resistance two ends, and the second Capacitance parallel connection is at the two ends of described voltage stabilizing didoe.
6. the drive circuit of fire-fighting emergency power supply as claimed in claim 5, is characterized in that, described light-coupled isolation driver module also comprises:
The second diode, the negative electrode of described the second diode is connected to the collector electrode of described power tube;
The 6th resistance, its one end is connected to the anode of described the second diode, and the other end is connected to described light-coupled isolation and drives chip;
The 3rd electric capacity, it is connected between described the 6th other end of resistance and the emitter of described power tube.
7. the drive circuit of fire-fighting emergency power supply as claimed in claim 6, is characterized in that, described light-coupled isolation driver module also comprises: fault cue circuit; Wherein, described fault cue circuit comprises:
Light-emitting diode and with the 7th resistance of the anode series of described light-emitting diode, the negative electrode of described light-emitting diode is connected to the failure output terminal that described light-coupled isolation drives chip, the other end of described the 7th resistance connects high level.
8. the drive circuit of fire-fighting emergency power supply as claimed in claim 7, is characterized in that, described power tube is insulated gate bipolar transistor.
CN201410030078.8A 2013-12-13 2014-01-22 Driving circuit of firefighting emergency power supply Pending CN103746547A (en)

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CN201410030078.8A CN103746547A (en) 2013-12-13 2014-01-22 Driving circuit of firefighting emergency power supply

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CN201310685144.0 2013-12-13
CN201310685144 2013-12-13
CN201410030078.8A CN103746547A (en) 2013-12-13 2014-01-22 Driving circuit of firefighting emergency power supply

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Cited By (1)

* Cited by examiner, † Cited by third party
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CN116191653A (en) * 2023-05-04 2023-05-30 国网山东省电力公司平度市供电公司 Direct-current emergency power supply applying master-slave control mode and control method thereof

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Publication number Priority date Publication date Assignee Title
CN116191653A (en) * 2023-05-04 2023-05-30 国网山东省电力公司平度市供电公司 Direct-current emergency power supply applying master-slave control mode and control method thereof

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Application publication date: 20140423