CN208401540U - A kind of anti-surge circuit for VPX power supply - Google Patents
A kind of anti-surge circuit for VPX power supply Download PDFInfo
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- CN208401540U CN208401540U CN201821052706.2U CN201821052706U CN208401540U CN 208401540 U CN208401540 U CN 208401540U CN 201821052706 U CN201821052706 U CN 201821052706U CN 208401540 U CN208401540 U CN 208401540U
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- unijunction transistor
- relay
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Abstract
The utility model discloses a kind of anti-surge circuits for VPX power supply, power supply is connect by power switch with relay, the current-limiting resistance other end is connect with thyristor anode, relay is also connect with dropping resistor one end, the dropping resistor other end is connect with diode cathode, diode cathode connects isolation capacitance, diode cathode is also connect with the second base stage of unijunction transistor, thyristor control electrode is connect with the first base stage of unijunction transistor, the first base stage of unijunction transistor also passes through load resistance and connect with power supply cathode, unijunction transistor emitter is connect by delay capacitor with power supply cathode, unijunction transistor emitter also passes through adjustable resistor and connect with diode cathode.The utility model has the beneficial effects that suction and time by control relay, spike electric current caused by preventing the power supply short time from powering on prevent to cause spark, protect power supply and other load circuits.
Description
Technical field
The utility model belongs to VPX power technique fields, and in particular to a kind of anti-surge circuit for VPX power supply.
Background technique
VPX bus improves power supply power supply ability, and 5V highest can provide 115W power, and 12V provides 384W, and 48V is provided
768W.In a slot of VME bus, the power of maximum 90W can only be provided using 5V power supply, and VPX bus only 5V power supply
115W power is provided for, 12V and 48V power supply can more provide the power of 384W and 768W.Such powerful power supply, makes
Obtaining VPX subcard can integrate more modules.Due to the power-on time end of VPX ontology power supply, peak surge electricity may be generated
Road causes spark, damages to VPX ontology power circuit.
Utility model content
To overcome technological deficiency of the existing technology, the utility model discloses a kind of Anti-surgings for VPX power supply
Circuit, structure is simple, increases the power-on time of load circuit, the spike electric current for preventing power supply powered on moment from generating
Power supply and load circuit are damaged.
Technical solution adopted by the utility model to solve its technical problems is a kind of Anti-surging electricity for VPX power supply
Road, including power supply and delay control circuit, the delay control circuit include relay, dropping resistor, current-limiting resistance, list
Junction transistors, thyristor, diode, isolation capacitance, delay capacitor and adjustable resistor；
The power supply anode is connect with power switch one end, the magnetic induction loop one of the power switch other end and relay
End connection, the magnetic induction loop other end of relay are connect with current-limiting resistance one end, and the current-limiting resistance other end and thyristor anode connect
It connects, thyristor cathode is connect with power supply cathode, and the relay other end is also connect with dropping resistor one end, and dropping resistor is another
End is connect with diode cathode, and diode cathode connects isolation capacitance, and diode cathode also connects with the second base stage of unijunction transistor
It connects, thyristor control electrode is connect with the first base stage of unijunction transistor, and the first base stage of unijunction transistor also passes through load resistance and supplies
Electric power cathode connection, unijunction transistor emitter are connect by delay capacitor with power supply cathode, unijunction transistor transmitting
Pole also passes through adjustable resistor and connect with diode cathode.
Preferably, the anti-surge circuit further includes delay control switch, and the delay control switch is connected in parallel to delay electricity
Hold both ends.
Preferably, the anti-surge circuit further includes protective resistance, and described protective resistance one end connects adjustable resistor,
The other end is connect with unijunction transistor emitter.
Preferably, the anti-surge circuit further includes voltage-stabiliser tube, and regulator tube negative is connect with dropping resistor, voltage-stabiliser tube anode
It is connect with power supply cathode.
Preferably, the relay is normally opened pattern relay.
The utility model has the beneficial effects that the anti-surge circuit principle is simple, circuit components are few, by control after
The suction and time delay of electric appliance increase the power-on time with other load circuits of the power supply of relay control connection, prevent
Only the power supply short time powers on caused spike electric current, prevents to cause spark, protects power supply and other load electricity
Road.
Detailed description of the invention
Fig. 1 is a kind of specific embodiment schematic diagram of the utility model.
Fig. 2 is another specific embodiment schematic diagram of the utility model.
Appended drawing reference: J- relay, E- power supply, SCR- thyristor, UJT- unijunction transistor, the first base stage of B1-,
The second base stage of B2-, D1- voltage-stabiliser tube, D2- diode, K1- power switch, K2- delay control switch, C1- isolation capacitance, C2- prolong
When capacitor, R1- current-limiting resistance, R2- dropping resistor, R3- load resistance, R4- protective resistance, RW- adjustable resistor.
Specific embodiment
More detailed description is done to the embodiments of the present invention below in conjunction with attached drawing and appended drawing reference, makes to be familiar with ability
The technology people in domain can implement accordingly after studying this specification carefully.It should be appreciated that specific embodiment described herein is only to solve
The utility model is released, is not used to limit the utility model.
In the description of the present invention, it should be noted that the orientation of the instructions such as term " on ", "horizontal", "inner" or
Positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing the present invention and simplifying the description,
Rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, because
This should not be understood as limiting the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in utility model.
Embodiment: referring to attached drawing 1, a kind of attached anti-surge circuit for VPX power supply shown in Fig. 2, including power supply E
And delay control circuit, the delay control circuit include relay J, dropping resistor R2, current-limiting resistance R1, unijunction transistor
UJT, thyristor SCR, diode R2, isolation capacitance C1, delay capacitor C2 and adjustable resistor RW；
The power supply E anode is connect with the one end power switch K1, the magnetic strength of the power switch K1 other end and relay J
The connection of coil one end, the magnetic induction loop other end of relay J are connect with the one end current-limiting resistance R1, the current-limiting resistance R1 other end and crystalline substance
The connection of brake tube SCR anode, thyristor SCR cathode connect with power supply E cathode, the relay J other end also with dropping resistor R2
One end connection, the dropping resistor R2 other end are connect with diode D2 anode, and diode D2 cathode connects isolation capacitance C1, diode
D2 cathode is also connect with the second base stage of unijunction transistor UJT B2, thyristor SCR control pole and the first base stage of unijunction transistor UJT
B1 connection, the first base stage of unijunction transistor UJT B1 also pass through load resistance R3 and connect with power supply E cathode, unijunction transistor
UJT emitter is connect by delay capacitor C2 with power supply E cathode, and unijunction transistor UJT emitter also passes through adjustable resistance
Device RW is connect with diode D2 anode.
In the present embodiment, relay J is normally opened pattern relay, when power switch K1 closure, drives the crystalline substance of relay J
Brake tube SCR default is not turned on, and relay J does not inhale and the load circuit no current connected with relay J control；Power supply E is logical
The magnetic induction loop and dropping resistor R2 of relay J are crossed, passing through after the voltage step-down that dropping resistor R2 exports power supply E can modulation
Device RW is hindered for delay capacitor C2 charging, when the voltage value of delay capacitor C2 reaches the threshold value of unijunction transistor UJT, single crystals
Body pipe UJT transient switching, the interior charge stored of isolation capacitance C1 are discharged by unijunction transistor UJT and load resistance R3, are flowed through
The electric current at the both ends load resistance R3 generates voltage on load resistance R3 and send to thyristor SCR control pole, then thyristor SCR
Conducting, relay J inhale and, with relay J control connection load circuit connect with power supply E, realization be delayed power on, wherein
The resistance sizes of itself can be changed in adjustable rheostat RW, and then change the charging time of delay capacitor C2, realize delay time
It adjusts.
Preferably, the anti-surge circuit further includes delay control switch K2, and the delay control switch K2, which is connected in parallel to, to be prolonged
When the both ends capacitor C2.
In another embodiment, delay time can be improved in delay control switch K2, for example, when anti-surge circuit
Normal delay time be after 5 seconds relay J inhale and, connect power supply E with the load circuit of relay J control connection, if
It is closed a delay control switch K2 in normal delay time 5 seconds, is released the charge on delay capacitor C2, therefore prolong
When capacitor C2 enter next time charging in, and then achieve the purpose that increase delay time.
Preferably, the anti-surge circuit further includes protective resistance R4, and the one end the protective resistance R4 connects adjustable resistance
Device RW, the other end are connect with unijunction transistor UJT emitter.
In another embodiment, delay time, setting protection can be changed due to adjusting the resistance value of adjustable rheostat RW
Resistance R4 is lacking of preventing adjustable rheostat RW to be adjusted to that electrical relay J on the power supply E that resistance value is zero appearance acts immediately
It falls into.
Preferably, the anti-surge circuit further includes voltage-stabiliser tube D1, and voltage-stabiliser tube D1 cathode is connect with dropping resistor R2, pressure stabilizing
Pipe D1 anode is connect with power supply E cathode.
In another embodiment, setting voltage-stabiliser tube D1 prevents power supply E output voltage excessively high, protects voltage-stabiliser tube D1
Late-class circuit afterwards.
The above content is the further descriptions made in conjunction with specific preferred embodiment to the utility model, cannot recognize
Determine specific embodiment of the present utility model to be only limited to these instructions.For the common skill of the utility model technical field
For art personnel, the other embodiments obtained in the case where not departing from the technical solution of the utility model be should be included in practical
In novel protection scope.
Claims (5)
1. a kind of anti-surge circuit for VPX power supply, it is characterised in that: including power supply (E) and delay control circuit, institute
Stating delay control circuit includes relay (J), dropping resistor (R2), current-limiting resistance (R1), unijunction transistor (UJT), thyristor
(SCR), diode (D2), isolation capacitance (C1), delay capacitor (C2) and adjustable resistor (RW)；
Power supply (E) anode is connect with the one end power switch (K1), power switch (K1) other end and relay (J)
The connection of magnetic induction loop one end, the magnetic induction loop other end of relay (J) are connect with the one end current-limiting resistance (R1), current-limiting resistance (R1)
The other end is connect with thyristor (SCR) anode, and thyristor (SCR) cathode is connect with power supply (E) cathode, and relay (J) is another
One end is also connect with the one end dropping resistor (R2), and dropping resistor (R2) other end is connect with diode (D2) anode, diode
(D2) cathode connection isolation capacitance (C1), diode (D2) cathode are also connect with the second base stage of unijunction transistor (UJT) (B2), brilliant
Brake tube (SCR) control electrode is connect with the first base stage of unijunction transistor (UJT) (B1), the first base stage of unijunction transistor (UJT) (B1)
It is also connect by load resistance (R3) with power supply (E) cathode, unijunction transistor (UJT) emitter passes through delay capacitor (C2)
It is connect with power supply (E) cathode, unijunction transistor (UJT) emitter is also passing through adjustable resistor (RW) and diode (D2) just
Pole connection.
2. being used for the anti-surge circuit of VPX power supply as described in claim 1, it is characterised in that: the anti-surge circuit also wraps
It includes delay control switch (K2), the delay control switch (K2) is connected in parallel to the both ends delay capacitor (C2).
3. being used for the anti-surge circuit of VPX power supply as described in claim 1, it is characterised in that: the anti-surge circuit also wraps
It includes protective resistance (R4), described protective resistance one end (R4) connects adjustable resistor (RW), the other end and unijunction transistor
(UJT) emitter connects.
4. being used for the anti-surge circuit of VPX power supply as described in claim 1, it is characterised in that: the anti-surge circuit also wraps
It includes voltage-stabiliser tube (D1), voltage-stabiliser tube (D1) cathode is connect with dropping resistor (R2), voltage-stabiliser tube (D1) anode and power supply (E) cathode
Connection.
5. being used for the anti-surge circuit of VPX power supply as described in claim 1, it is characterised in that: the relay (J) is normally opened
Pattern relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821052706.2U CN208401540U (en) | 2018-07-04 | 2018-07-04 | A kind of anti-surge circuit for VPX power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821052706.2U CN208401540U (en) | 2018-07-04 | 2018-07-04 | A kind of anti-surge circuit for VPX power supply |
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| Publication Number | Publication Date |
|---|---|
| CN208401540U true CN208401540U (en) | 2019-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821052706.2U Active CN208401540U (en) | 2018-07-04 | 2018-07-04 | A kind of anti-surge circuit for VPX power supply |
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| CN (1) | CN208401540U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110554757A (en) * | 2019-09-06 | 2019-12-10 | 山东超越数控电子股份有限公司 | Time-sharing power-on power supply system and design method thereof |
-
2018
- 2018-07-04 CN CN201821052706.2U patent/CN208401540U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110554757A (en) * | 2019-09-06 | 2019-12-10 | 山东超越数控电子股份有限公司 | Time-sharing power-on power supply system and design method thereof |
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