The content of the invention
The embodiment provides a kind of capacitor discharging circuit, modular power source and redundant system, it is intended to solves currentThe loss that capacitor discharging circuit in modular power source is present is too high and the problem of low reliability.
In a first aspect, the embodiments of the invention provide a kind of capacitor discharging circuit, in modular power source, the module to be electricSource is used to be connected to a bus interface board pluggablely, and the extraction detection that the capacitor discharging circuit includes being sequentially connected is singleMember, switch element and discharge cell；
Wherein, the extraction detection unit is used to detect whether the modular power source is extracted from the bus interface board,To control the break-make of the switch element；
When the modular power source is transferred to, the switching means conductive, the discharge cell is discharged；
When the modular power source is not transferred to, the switch element disconnects, and the discharge cell is open circuit.
Its further technical scheme is：The discharge cell includes the first electric capacity and discharge resistance；The switch element bagInclude switching tube, voltage-regulator diode and voltage supply resistance；Wherein, the positive pole connection of described discharge resistance one end and electric capacity, the other endIt is connected by the switching tube of the switch element with electric capacity negative pole；Described voltage supply resistance one end connects power supply, and other end connection is steadyPress the negative pole and switching tube of diode, the voltage-regulator diode plus earth.
Its further technical scheme is：The discharge resistance is composed in parallel by second resistance and 3rd resistor.
Its further technical scheme is：The voltage supply resistance is by first resistor, the 4th resistance and the 5th resistance string joint groupInto.
Its further technical scheme is：The extraction detection unit includes the first detection unit, first detection unitIncluding the first diode and the 6th resistance, one end of the 6th resistance is connected with the first pin, and the modular power source insertion is described totalDuring line interface plate, first pin is connected with the earth terminal on the bus interface board, the other end of the 6th resistance connection theThe negative pole of one diode.
Its further technical scheme is：The extraction detection unit also includes the second detection unit, and second detection is singleMember includes the second diode and the 7th resistance, and one end of the 7th resistance is connected with second pin, and the modular power source insertion is describedDuring bus interface board, the second pin is connected with the earth terminal on the bus interface board, the other end connection of the 7th resistanceThe negative pole of second diode.
Its further technical scheme is：The switching tube is metal-oxide-semiconductor.
Its further technical scheme is：The switching tube is managed for N-MOS.
Second aspect, the embodiment of the present invention also provides a kind of modular power source, and an EBI is connected to for pluggableOn plate, the modular power source includes capacitor discharging circuit as above described in first aspect.
The third aspect, the embodiment of the present invention also provides a kind of redundant system, including bus interface board and it is pluggable evenIt is connected to modular power source described in multiple as above second aspects on the bus interface board.
Compared with prior art, the present invention has the advantages that：
Capacitor discharging circuit can be turned off there is provided one kind in an embodiment of the present invention, extracting detection unit is used to detectWhether the modular power source is extracted from bus interface board, to control the break-make of the switch element；, should when the modular power source is transferred toSwitching means conductive, the discharge cell is discharged；When modular power source is not transferred to, the switch element disconnects, and now discharges singleFirst open circuit.Embodiments of the invention detect whether whole circuit module is extracted due to setting extraction detection cell circuit, and thenThe discharging function that turns off of the condenser network is realized, the reliability of circuit is also higher while reduction loss.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, completeSite preparation is described, it is clear that described embodiment is a part of embodiment of the invention, rather than whole embodiments.Based on this hairEmbodiment in bright, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not madeExample, belongs to the scope of protection of the invention.
It should be appreciated that ought be in this specification and in the appended claims in use, term " comprising " and "comprising" be indicatedDescribed feature, entirety, step, operation, the presence of element and/or component, but be not precluded from one or more of the other feature, it is wholeBody, step, operation, element, component and/or its presence or addition for gathering.
It is also understood that the term used in this description of the invention is merely for the sake of the mesh for describing specific embodimentAnd be not intended to limit the present invention.As used in description of the invention and appended claims, unless onOther situations are hereafter clearly indicated, otherwise " one " of singulative, " one " and "the" are intended to include plural form.
Fig. 1 and Fig. 2 illustrate capacitor discharging circuit 1000 provided in an embodiment of the present invention.Fig. 3 illustrates implementation of the present inventionThe pluggable matching relationship of modular power source 1010 and 1020 and bus interface board 1030 in the redundant system that example is provided.
Fig. 1 is referred to Fig. 3.Capacitor discharging circuit 1000 provided in an embodiment of the present invention, in modular power source 1020,The modular power source 1020 is used to be connected to a bus interface board 1030 pluggablely, and the interface end of bus interface board 1030 includesPositive pole 1031, negative pole 1032 and earth terminal 1033.The bus interface board 1030 can connect multiple module power supply circuits, realize manyIndividual wired in parallel expands the effect of power to reach.
The capacitor discharging circuit 1000 of the present embodiment include be sequentially connected extraction detection unit 100, switch element 200 withAnd discharge cell 300.Wherein, whether the extraction detection unit 100 is used to detect the modular power source 1020 from the bus interface boardExtracted on 1030, to control the break-make of the switch element 200.When modular power source 1020 is transferred to, the switch element 200 is turned on,Discharge cell 300 is discharged；When modular power source 1020 is not transferred to, the switch element 200 disconnects, the open circuit of discharge cell 300Do not discharge.Embodiments of the invention enter due to setting the extraction circuit of detection unit 100 to detect whether whole circuit module is extractedAnd the discharging function that turns off of the condenser network 1000 is realized, the reliability of circuit is also higher while reduction loss.
Referring to Fig. 2, in this preferred embodiment, discharge cell 300 includes the first electric capacity C1 and discharge resistance 301；SwitchUnit 200 includes switching tube Q1, voltage-regulator diode ZD1 and voltage supply resistance 201；Wherein, described one end of discharge resistance 301 and theOne electric capacity C1 positive pole connection, the other end is connected with the first connection end 1 of the switching tube Q1, and the second of the switching tube Q1 connectsEnd 2 is connect to be connected and be grounded with the negative pole of the first electric capacity C1；Described one end of voltage supply resistance 201 and the first electric capacity C1 are justPole is connected, and the other end connects the 3rd connection end 3 of the switching tube and the negative pole of the voltage-regulator diode ZD1, the voltage stabilizingDiode ZD1 plus earth.
As preferred, the discharge resistance 301 is composed in parallel by second resistance R2 and 3rd resistor R3.
As preferred, the voltage supply resistance 201 is by first resistor R1, the 4th resistance R4 and the 5th resistance R5 series connection groupsInto.
As preferred, the switching tube Q1 is metal-oxide-semiconductor.According to the characteristic of circuit of the present invention, selection N-MOS pipes are as openingClose pipe Q1.Switching tube Q1 is that the grid of N-MOS pipes is connected between voltage supply resistance 201 and voltage-regulator diode ZD1 negative poles, togetherWhen be also connected with extracting detection cell circuit 100, switching tube Q1 drain electrode (the first connection end 1) connects electricity by discharge resistance 301Source, its source electrode (the second connection end 2) ground connection.As long as therefore grid (the 3rd connection end 3) voltage reaches threshold voltage, the switching tubeQ1 will be turned on.
Further, extracting detection unit 100 includes the first detection unit 101, and first detection unit 101 includes firstDiode D1 and the 6th resistance R6, first diode D1 positive pole are connected to switching tube Q1 the 3rd connection end 3, its negative poleIt is connected with the 6th resistance R6 one end, the 6th resistance R6 other end is connected with the first pin HS, modular power source 1020When inserting bus interface board 1030, the first pin HS is connected with the earth terminal 1033 on the bus interface board 1030.Selectively,The extraction detection unit also includes the second detection unit 102, and second detection unit 102 includes the electricity of the second diode D2 and the 7thR7 is hindered, the second diode D2 positive pole is connected to one end of switching tube Q1 the 3rd connection end 3, its negative pole and the 7th resistance R7It is connected, the 7th resistance R7 other end is connected with second pin HS1, and modular power source 1020 inserts the bus interface board 1030When, second pin HS1 is connected prior to the first pin HS with the earth terminal 1033 on bus interface board 1030.Wherein second inspectionSurvey unit 102 is optional circuit, and the first pin HS is used for doing insertion startup pin, i.e., just start mould after the first pin HS is groundedBlock, in golden finger interface application, referring to Fig. 3, the first pin HS may be designed to most short pin, only when other are managedPin is all contacted well, and the first pin HS can just be contacted, and now modular power source 1020 could start, but can so give electric discharge inspectionMeasuring tape carrys out problem, when other pins such as both positive and negative polarity has been contacted, and in the time that the first pin HS is not in contact with, for above-mentioned electricityRoad thinks that now modular power source 1020 is to extract, but actual module power supply 1020 exports powered, and discharge resistance 301 is madeIt can discharge, can produce loss can possibly even cause to burn.Therefore the second detection unit 102 of increase, sets the second detection unitSecond pin HS1 in 102 is pin most long in all pins, prior to the access of other pins, so both can guarantee that startup sequential,Again will not false triggering discharge circuit, when modular power source 1020 is connected, second pin HS1 ends equivalent ground connection at first, then switching tube Q1Grid level ground connection, switching tube Q1 is not turned on, and the open circuit of discharge cell 300 is not discharged, it is to avoid is produced loss and is even burnt；When module electricityWhen source 1020 is extracted, second pin HS1 ends are finally hanging, and switching tube Q1 grid obtains voltage of voltage regulation, and switching tube Q1 conductings are putFirst electric capacity C1 passes through second resistance R2 and 3rd resistor R3 repid discharges to safe voltage in electric unit 300, it is to avoid electric shockIt is dangerous.
As shown in figure 3, the embodiment of the present invention also provides a kind of power module 1020 and a kind of redundant system.Wherein, it is electricSource module 1020 includes the capacitor discharging circuit 1000 and other interlock circuit units described by above-described embodiment.The redundancySystem includes bus interface board 1030 and pluggable the multiple modular power sources being connected on the bus interface board 1030.ForPower module and other circuit structures of redundant system are well known to those skilled in the art, and will not be repeated here.
Compared with prior art, the present invention has the advantages that：
Capacitor discharging circuit can be turned off there is provided one kind in an embodiment of the present invention, extracting detection unit is used to detectWhether the modular power source is extracted from bus interface board, to control the break-make of the switch element；, should when the modular power source is transferred toSwitching means conductive, the discharge cell is discharged；When modular power source is not transferred to, the switch element disconnects, and now discharges singleFirst open circuit.Extract detection cell circuit detects whether whole circuit module is extracted by the way that whether port is grounded, should if extractingPort is hanging, and switch element starts, and the electric charge that discharge cell starts on electric discharge, electric capacity is discharged by discharge resistance, is realized with thisThe condenser network turns off discharging function, while the extraction detection unit also includes the second detection unit, with the first inspectionUnit identical structure is surveyed, but bus interface board is accessed prior to the first detection unit, it is ensured that normally starts sequential, while will not againFalse triggering discharge circuit, the reliability of circuit is also higher while reduction loss.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, anyThose familiar with the art the invention discloses technical scope in, various equivalent modifications can be readily occurred in or replacedChange, these modifications or substitutions should be all included within the scope of the present invention.Therefore, protection scope of the present invention should be with rightIt is required that protection domain be defined.