CN203445783U - Circuit topology structure of redundancy constant voltage power supply - Google Patents
Circuit topology structure of redundancy constant voltage power supply Download PDFInfo
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- CN203445783U CN203445783U CN201320598421.XU CN201320598421U CN203445783U CN 203445783 U CN203445783 U CN 203445783U CN 201320598421 U CN201320598421 U CN 201320598421U CN 203445783 U CN203445783 U CN 203445783U
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Abstract
A circuit topology structure of a redundancy constant voltage power supply comprises a load RL, and at least two constant voltage power supplies V1 and V2 used for supplying power to the load RL. The switch devices and the relays are both in series connection between the positive voltage ends V1+ and V2+ of the constant voltage power supplies V1 and V2 and one end V0+ of the load RL, and the switch devices are both in series connection between the negative voltage ends V1- and V2- of the constant voltage power supplies V1 and V2 and the other end V0- of the load RL. According to the utility model, a half bridge arm unit circuit which is composed of the switch devices, such as the diodes, the triodes, etc., is added between the negative voltage ends of the constant voltage power supplies and the load RL, so that the connection mode of the redundancy constant voltage power supply and the load RL is changed into a double half bridge arm connection mode from a single half bridge arm connection mode, and the work reliability of the redundancy constant voltage power supply can be improved effectively.
Description
Technical field
The utility model relates to a kind of circuit topological structure, particularly a kind of circuit topological structure of redundancy constant voltage source.
Background technology
At present; in order to improve the power supply reliability of electronic system, avoid the problem that causes electronic system to work due to power supply fault, conventionally can in parallel one or more export identical power supply and be used as backup battery; form redundant power, to guarantee the reliability of electronic system work.
As shown in Figure 1, for having the conventional connected mode of duplex feeding constant voltage source and load in prior art, wherein V1+ and V2+ represent respectively the positive voltage terminal of input constant voltage source V1 and V2, and V-represents the negative voltage side that constant voltage source is shared, and RL represents load.Positive voltage terminal V1+, the V2+ of constant voltage source V1 and V2 is connected with one end VO+ of load RL with D2 by series diode D1 respectively, and the other end VO-of load RL is directly directly connected with the negative voltage side of V2 with constant voltage source V1.By the positive voltage terminal of above-mentioned constant voltage source, the connected mode by the switching devices such as diode and load RL is referred to as half brachium pontis connection mode for we, and the connected mode between whole constant voltage source and load RL is referred to as to single half brachium pontis connection mode.Wherein, in accompanying drawing 1 circuit structure in dotted portion we be referred to as half bridge arm unit circuit.
This list half brachium pontis connection mode is mainly based upon under the trouble-proof prerequisite of redundancy device (as diode D1, D2), but any electronic device has certain failure rate, is inevitably, and this also adopts the reason of redundant power power supply just.But this list half brachium pontis connection mode exists defect also: (comprising short circuit, hydraulic performance decline, open circuit etc.) when arbitrary device breaks down in redundancy device all can affect the normal operation of circuit, redundant power was lost efficacy.
Therefore, be necessary to provide a kind of circuit topological structure of improved redundancy constant voltage source, the deficiency existing to overcome prior art.
Utility model content
For overcoming the problem of the deficiencies in the prior art and existence, the utility model provides a kind of circuit topological structure of redundancy constant voltage source, to improve the functional reliability of redundancy constant voltage source.
The utility model is achieved through the following technical solutions:
A kind of circuit topological structure of redundancy constant voltage source, comprise load RL, at least two-way is used to constant voltage source V1 and the V2 of load RL power supply, between positive voltage terminal V1+, the V2+ of described constant voltage source V1, V2 and one end VO+ of load RL, be all connected in series with switching device, between described constant voltage source V1 and negative voltage side V1-, the V2-of V2 and the other end VO-of load RL, be all connected in series with switching device.
Positive voltage terminal V1+, the V2+ of the V1 of described constant voltage source, V2 is connected with half brachium pontis connection mode by switching device with one end VO+ of load RL; Meanwhile, negative voltage side V1-, the V2-of the V1 of described constant voltage source, V2 is also connected with half brachium pontis connection mode by switching device with the other end VO-of load RL, between constant voltage source V1, V2 and load RL, with two half brachium pontis connection modes, is connected.
Preferably, described switching device is diode, triode, field effect transistor or insulated gate bipolar transistor, and described constant voltage source is DC constant voltage power supply, comprises Switching Power Supply or battery etc.
Further, when described switch is triode, when field effect transistor or insulated gate bipolar transistor, described circuit topological structure also includes at least two relays, wherein, the normally-closed contact of one relay is connected in series in the collector electrode of positive voltage terminal V1+ and the described triode Tr21 of described constant voltage source V1, the drain electrode of described field effect transistor Tr31 or state between the collector electrode of insulated gate bipolar transistor Tr41, the normally-closed contact of another relay is also connected in series in the collector electrode of positive voltage terminal V2+ and the described triode Tr22 of described constant voltage source V2, between the collector electrode of the drain electrode of described field effect transistor Tr32 or described insulated gate bipolar transistor Tr42.
When described switching device is triode, field effect transistor or insulated gate bipolar transistor, need to increase base stage, field effect transistor, the grid of insulated gate bipolar transistor or the relay coil of relay that corresponding control circuit is connected in triode, with the break-make of control switch device and relay; The object that increases relay is to protect the switching devices such as triode, field effect transistor or insulated gate bipolar transistor; and further expand functional reliability of the present utility model with and range of application, when switching device is diode, do not need to increase corresponding control circuit.
The utility model is by increasing by the half bridge arm unit circuit being comprised of switching devices such as diode, triodes between the negative voltage side at constant voltage source and load RL, the connected mode that makes redundancy constant voltage source and load RL becomes two half brachium pontis connection modes from the connection mode of single half brachium pontis, can effectively improve the functional reliability of redundancy constant voltage source.
Accompanying drawing explanation
Fig. 1 is the connection diagram between redundancy constant voltage source and load RL, i.e. the list half brachium pontis connection mode of redundancy constant voltage source in prior art;
Fig. 2 is the circuit theory schematic diagram of embodiment 1 in the utility model;
Fig. 3 is the circuit theory schematic diagram of embodiment 2 in the utility model;
Fig. 4 is the circuit theory schematic diagram of embodiment 3 in the utility model;
Fig. 5 is the circuit theory schematic diagram of embodiment 4 in the utility model.
Embodiment
Understanding for the ease of those skilled in the art, is described in further detail the utility model below in conjunction with the drawings and specific embodiments.
As shown in accompanying drawing 2-5, a kind of circuit topological structure of redundancy constant voltage source, comprise load RL, at least two-way is used to constant voltage source V1 and the V2 of load RL power supply, between positive voltage terminal V1+, the V2+ of described constant voltage source V1, V2 and one end VO+ of load RL, be all connected in series with switching device, between described constant voltage source V1 and negative voltage side V1-, the V2-of V2 and the other end VO-of load RL, be all connected in series with switching device.
Preferably, described switching device is diode, triode, field effect transistor or insulated gate bipolar transistor; When described switching device is triode, field effect transistor or insulated gate bipolar transistor, need to increase base stage, field effect transistor, the grid of insulated gate bipolar transistor or the relay coil of relay that corresponding control circuit is connected in triode, with the break-make of control switch device and relay; The object that increases relay is to protect the switching devices such as triode, field effect transistor or insulated gate bipolar transistor; and further expand functional reliability of the present utility model with and range of application, when switching device is diode, do not need to increase corresponding control circuit.
Positive voltage terminal V1+, the V2+ of the V1 of described constant voltage source, V2 is connected with half brachium pontis connection mode with relay (except the circuit being constituted by a diode) by switching device with one end VO+ of load RL; Meanwhile, negative voltage side V1-, the V2-of the V1 of described constant voltage source, V2 is also connected with half brachium pontis connection mode by switching device with the other end VO-of load RL, between constant voltage source V1, V2 and load RL, with two half brachium pontis connection modes, is connected.Described constant voltage source is DC constant voltage power supply, comprises Switching Power Supply or battery etc.
embodiment 1
As shown in Figure 2, described switching device is diode, and described diode comprises diode D11, D12, D13, D14; The positive pole of described diode D11 is connected with the positive voltage terminal V1+ of constant voltage source V1, and its negative pole is connected with one end VO+ of load RL; The positive pole of described diode D12 is connected with the positive voltage terminal V2+ of constant voltage source V2, and its negative pole is connected with one end VO+ of load RL; The negative pole of described diode D13 is connected with the negative voltage side V1-of constant voltage source V1, and its negative pole is connected with the other end VO-of load RL; The negative pole of described diode D14 is connected with the negative voltage side V1-of constant voltage source V2, and its negative pole is connected with the other end VO-of load RL.
embodiment 2
As shown in Figure 3, described switching device is triode and relay, and described triode comprises triode Tr21, Tr22, Tr23, Tr24; The collector electrode of described triode Tr21 is connected with the positive voltage terminal V1+ of constant voltage source V1, and its emitter is connected with one end VO+ of load RL; The collector electrode of described triode Tr22 is connected with the positive voltage terminal V2+ of constant voltage source V2, and its emitter is connected with one end VO+ of load RL; The emitter of described triode Tr23 is connected with the negative voltage side V1-of constant voltage source V1, and its collector electrode is connected with the other end VO-of load RL; The emitter of described triode Tr24 is connected with the negative voltage side V1-of constant voltage source V2, and its collector electrode is connected with the other end VO-of load RL.Further, between positive voltage terminal V1+, the V2+ of V1, the V2 of described constant voltage source and described triode Tr21, Tr22, be also connected in series with relay K M21, KM22.Wherein, the normally-closed contact of relay K M21 is connected in series between the positive voltage terminal V1+ of V1 and the collector electrode of described triode Tr21 of constant voltage source; The normally-closed contact of relay K M22 is connected in series between the positive voltage terminal V2+ of V2 and the collector electrode of described triode Tr22 of constant voltage source.Preferably, in the present embodiment, described triode is NPN double pole triode (BJT).
embodiment 3
As shown in Figure 4, described switching device is field effect transistor, and described field effect transistor comprises field effect transistor Tr31, Tr32, Tr33, Tr34; The drain electrode of described field effect transistor Tr31 is connected with the positive voltage terminal V1+ of constant voltage source V1, and its source electrode is connected with one end VO+ of load RL; The drain electrode of described field effect transistor Tr32 is connected with the positive voltage terminal V2+ of constant voltage source V2, and its source electrode is connected with one end VO+ of load RL; The source electrode of described field effect transistor Tr33 is connected with the negative voltage side V1-of constant voltage source V1, and its drain electrode is connected with the other end VO-of load RL; The source electrode of described field effect transistor Tr34 is connected with the negative voltage side V1-of constant voltage source V2, and its drain electrode is connected with the other end VO-of load RL.Further, between positive voltage terminal V1+, the V2+ of V1, the V2 of described constant voltage source and described field effect transistor Tr31, Tr32, be also connected in series with relay K M31, KM32.Wherein, the normally-closed contact of relay K M31 is connected in series between the positive voltage terminal V1+ and the drain electrode of described field effect transistor Tr31 of V1 of constant voltage source; The normally-closed contact of relay K M32 is connected in series between the positive voltage terminal V2+ and the drain electrode of described field effect transistor Tr32 of V2 of constant voltage source.Preferably, in the present embodiment, described field effect transistor is N channel field-effect pipe (MOSFET).
embodiment 4
As shown in Figure 5, described switching device is insulated gate bipolar transistor (IGBT), and described insulated gate bipolar transistor comprises insulated gate bipolar transistor Tr41, Tr42, Tr43, Tr44; The collector electrode of described insulated gate bipolar transistor Tr41 is connected with the positive voltage terminal V1+ of constant voltage source V1, and its emitter is connected with one end VO+ of load RL; The collector electrode of described insulated gate bipolar transistor Tr42 is connected with the positive voltage terminal V2+ of constant voltage source V2, and its emitter is connected with one end VO+ of load RL; The emitter of described insulated gate bipolar transistor Tr43 is connected with the negative voltage side V1-of constant voltage source V1, and its collector electrode is connected with the other end VO-of load RL; The emitter of described insulated gate bipolar transistor Tr44 is connected with the negative voltage side V1-of constant voltage source V2, and its collector electrode is connected with the other end VO-of load RL.Further, between positive voltage terminal V1+, the V2+ of V1, the V2 of described constant voltage source and described insulated gate bipolar transistor Tr41, Tr42, be also connected in series with relay K M41, KM42.Wherein, the normally-closed contact of relay K M41 is connected in series between the positive voltage terminal V1+ of V1 and the collector electrode of described insulated gate bipolar transistor Tr41 of constant voltage source; The normally-closed contact of relay K M42 is connected in series between the positive voltage terminal V2+ of V2 and the collector electrode of insulated gate bipolar transistor Tr42 of constant voltage source.
Below the operation principle of each embodiment of the present utility model is further described: main inventive concept of the present utility model is for replacing the list half brachium pontis connection mode of generally applying in current redundancy constant voltage source with the connection mode of two half brachium pontis, to improve the functional reliability of redundancy constant voltage source, when breaking down, a certain device of redundant circuit (comprises short circuit, hydraulic performance decline, open circuit etc.), do not have influence on as far as possible the work to rear class load RL, thereby improve the work MBTF(mean free error time of redundancy constant voltage source), make it not disobey redundancy original intention, maximize its reliability, stability.For convenience of describing, herein by the load RL(in each accompanying drawing containing) circuit (as the circuit part being comprised of switching device, relay) of above part is called first bridge arm unit circuit, and load RL(containing) following circuit (circuit part being comprised of switching device) is partly called second bridge arm unit circuit.In addition, constant voltage source herein mainly refers to DC constant voltage power supply.
Two half bridge arm unit circuit that formed by diode, triode, field effect transistor, insulated gate bipolar transistor and relay (except the circuit being constituted by a diode) in each embodiment above, be to utilize the reverse voltage endurance of each diode component or the contact of relay as the isolation between power pack and load, and after its conducting, good low resistance resist (or low-voltage is fallen) characteristic.When there is short trouble in the inner output of a certain road power supply wherein, at load voltage, drop to the moment below design load, effect isolation due to the reverse voltage endurance (diode circuit) of semiconductor switch device or relay contact (circuit that other three kinds of switching devices form), make electric current not form loop by the output circuit of short trouble power supply, prevented that load voltage from dropping to dangerous degree.
Even now Redundanter schalter device short circuit in upper (lower) half brachium pontis, also can due under (on) the redundant diode device of brachium pontis oppositely the effect of the contact of withstand voltage or relay isolated, fault power supply is exited automatically, guaranteed the normal stable of load supplying.
In above-described embodiment 2-4, when described switching device is triode, field effect transistor or insulated gate bipolar transistor, need to increase the base stage that corresponding control circuit is connected in triode, grid or the relay coil of field effect transistor insulated gate bipolar transistor, with the break-make of control switch device and relay contact; Can utilize the methods such as internal resistance detection, current detecting, voltage detecting to judge whether voltage source has fault also to carry out accordingly the break-make of control switch device and relay contact, simultaneously the alternative alarm signals such as acousto-optic of exporting.And when switching device is diode (as described in Example 1), do not need to increase corresponding control circuit.
Why select triode (BJT), field effect transistor (MOSFET), IGBT etc. as a kind of preferred version of switching device, to consider that the large current lead-through forward voltage drop of general-purpose diode and fast recovery diode is large, heating is large, unfavorable to environmental protection, and Schottky diode (SCHOTTKY BARRIER RECTIFIER) is because of withstand voltage low inapplicable in the high occasion of direct current supply voltage.And the little and relay contact of the conduction impedance (or conduction voltage drop) that utilizes triode, field effect transistor, insulated gate bipolar transistor infinitely-great characteristic of impedance while disconnecting when normal operation (and not power consumption) can be given full play to its advantage separately.
The list half brachium pontis connection mode that in prior art, redundancy constant voltage source is generally applied, its reliability that improves the work of power supply is mainly based upon under the trouble-proof prerequisite of redundancy device, but be on recordly, any electronic device, there is certain failure rate, inevitably, and this reason that also why redundant power supply exists just.In the process of redundant power supply load power supply, if because of a variety of causes, when there is the various electromagnetic interference at larger pulsating current and surge electromotive force and scene, can cause the failure probability that each switching device is certain.In the utility model, with the connection mode of two half brachium pontis, replace single half brachium pontis connection mode, i.e. constant voltage source redundancy not only, redundant circuit itself is redundancy also, has increased overall work reliability, can greatly improve the reliability of constant voltage source redundant power supply.
Certainly; the utility model can also be selected the switching device of other types as required; or can in half bridge arm unit circuit, suitably increase corresponding circuit; what each embodiment was cited above is only the utility model preferred embodiment; also be in order to set forth better circuit topological structure of the present utility model; be not to restriction of the present utility model, do not departing under the prerequisite of inventive concept of the present utility model, any apparent replacement is all within protection range of the present utility model.
Claims (7)
1. the circuit topological structure of a redundancy constant voltage source, comprise load RL, at least two-way is used to constant voltage source V1 and the V2 of load RL power supply, it is characterized in that: between positive voltage terminal V1+, the V2+ of described constant voltage source V1, V2 and one end VO+ of load RL, be all connected in series with switching device, between described constant voltage source V1 and negative voltage side V1-, the V2-of V2 and the other end VO-of load RL, be all connected in series with switching device.
2. circuit topological structure according to claim 1, is characterized in that: described switching device is diode, and described diode comprises diode D11, D12, D13, D14;
The positive pole of described diode D11 is connected with the positive voltage terminal V1+ of constant voltage source V1, and its negative pole is connected with one end VO+ of load RL;
The positive pole of described diode D12 is connected with the positive voltage terminal V2+ of constant voltage source V2, and its negative pole is connected with one end VO+ of load RL;
The negative pole of described diode D13 is connected with the negative voltage side V1-of constant voltage source V1, and its negative pole is connected with the other end VO-of load RL;
The negative pole of described diode D14 is connected with the negative voltage side V1-of constant voltage source V2, and its negative pole is connected with the other end VO-of load RL.
3. circuit topological structure according to claim 1, is characterized in that: described switching device is triode, and described triode comprises triode Tr21, Tr22, Tr23, Tr24;
The collector electrode of described triode Tr21 is connected with the positive voltage terminal V1+ of constant voltage source V1, and its emitter is connected with one end VO+ of load RL;
The collector electrode of described triode Tr22 is connected with the positive voltage terminal V2+ of constant voltage source V2, and its emitter is connected with one end VO+ of load RL;
The emitter of described triode Tr23 is connected with the negative voltage side V1-of constant voltage source V1, and its collector electrode is connected with the other end VO-of load RL;
The emitter of described triode Tr24 is connected with the negative voltage side V1-of constant voltage source V2, and its collector electrode is connected with the other end VO-of load RL.
4. circuit topological structure according to claim 1, is characterized in that: described switching device is field effect transistor, and described field effect transistor comprises field effect transistor Tr31, Tr32, Tr33, Tr34;
The drain electrode of described field effect transistor Tr31 is connected with the positive voltage terminal V1+ of constant voltage source V1, and its source electrode is connected with one end VO+ of load RL;
The drain electrode of described field effect transistor Tr32 is connected with the positive voltage terminal V2+ of constant voltage source V2, and its source electrode is connected with one end VO+ of load RL;
The source electrode of described field effect transistor Tr33 is connected with the negative voltage side V1-of constant voltage source V1, and its drain electrode is connected with the other end VO-of load RL;
The source electrode of described field effect transistor Tr34 is connected with the negative voltage side V1-of constant voltage source V2, and its drain electrode is connected with the other end VO-of load RL.
5. circuit topological structure according to claim 1, is characterized in that: described switching device is insulated gate bipolar transistor, and described insulated gate bipolar transistor comprises insulated gate bipolar transistor Tr41, Tr42, Tr43, Tr44;
The collector electrode of described insulated gate bipolar transistor Tr41 is connected with the positive voltage terminal V1+ of constant voltage source V1, and its emitter is connected with one end VO+ of load RL;
The collector electrode of described insulated gate bipolar transistor Tr42 is connected with the positive voltage terminal V2+ of constant voltage source V2, and its emitter is connected with one end VO+ of load RL;
The emitter of described insulated gate bipolar transistor Tr43 is connected with the negative voltage side V1-of constant voltage source V1, and its collector electrode is connected with the other end VO-of load RL;
The emitter of described insulated gate bipolar transistor Tr44 is connected with the negative voltage side V1-of constant voltage source V2, and its collector electrode is connected with the other end VO-of load RL.
6. according to the circuit topological structure described in any one in claim 3～5, it is characterized in that: described circuit topological structure also includes at least two relays,
The normally-closed contact of one relay is connected in series between the positive voltage terminal V1+ of described constant voltage source V1 and the collector electrode of described triode Tr21, and the normally-closed contact of another relay is connected in series between the positive voltage terminal V2+ of described constant voltage source V2 and the collector electrode of described triode Tr22; Or
The normally-closed contact of one relay is connected in series between the positive voltage terminal V1+ and the drain electrode of described field effect transistor Tr31 of described constant voltage source V1, and the normally-closed contact of another relay is connected in series between the positive voltage terminal V2+ and the drain electrode of described field effect transistor Tr32 of described constant voltage source V2; Or
The normally-closed contact of one relay is connected in series between the positive voltage terminal V1+ of described constant voltage source V1 and the collector electrode of described insulated gate bipolar transistor Tr41, and the normally-closed contact of another relay is connected in series between the positive voltage terminal V2+ of described constant voltage source V2 and the collector electrode of described insulated gate bipolar transistor Tr42.
7. according to the circuit topological structure described in any one in claim 1～5, it is characterized in that: described constant voltage source is DC constant voltage power supply, comprise Switching Power Supply or battery.
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| CN201320598421.XU CN203445783U (en) | 2013-09-26 | 2013-09-26 | Circuit topology structure of redundancy constant voltage power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913877A (en) * | 2016-03-31 | 2016-08-31 | 华为技术有限公司 | Memory device, self-checking method for stand-by alive circuit of memory device, and control chip |
| CN107404224A (en) * | 2017-07-25 | 2017-11-28 | 许继电气股份有限公司 | A kind of compression joint type IGBT current converter valve low voltage supply units |
| CN108321924A (en) * | 2018-02-08 | 2018-07-24 | 柳州钢铁股份有限公司 | Redundant direct current regulated power supply system |
-
2013
- 2013-09-26 CN CN201320598421.XU patent/CN203445783U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105913877A (en) * | 2016-03-31 | 2016-08-31 | 华为技术有限公司 | Memory device, self-checking method for stand-by alive circuit of memory device, and control chip |
| CN107404224A (en) * | 2017-07-25 | 2017-11-28 | 许继电气股份有限公司 | A kind of compression joint type IGBT current converter valve low voltage supply units |
| CN107404224B (en) * | 2017-07-25 | 2020-04-28 | 许继电气股份有限公司 | Crimping type IGBT converter valve low-voltage power supply device |
| CN108321924A (en) * | 2018-02-08 | 2018-07-24 | 柳州钢铁股份有限公司 | Redundant direct current regulated power supply system |
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