CN205407256U - Multi -stage parallel connection supply circuit - Google Patents
Multi -stage parallel connection supply circuit Download PDFInfo
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- CN205407256U CN205407256U CN201620149319.5U CN201620149319U CN205407256U CN 205407256 U CN205407256 U CN 205407256U CN 201620149319 U CN201620149319 U CN 201620149319U CN 205407256 U CN205407256 U CN 205407256U
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Abstract
The utility model discloses a multi -stage parallel connection supply circuit, the negative pole of little load has connect and has been used for an automatic switch perhaps blocks when breaking to dividing from the closure to closed from dividing to break big load current backward flow extremely the DC power supply negative pole block the device. The utility model discloses can solve the negative pole crosstalk risk of bringing when multistage protection is parallelly connected to be used, can avoid the unexpected disconnection of bipolar switch, improve validity, the reliability of circuit work, circuit structure is simple, and easy realization has higher practical value.
Description
Technical field
This utility model relates to a kind of plural parallel stage power supply circuits.
Background technology
In railway transportation equipment, for using specific function demand, protection switch plural parallel stage cross-over control loaded situation altogether inevitably occurs.When protecting contact capacity inconsistent, the action of little load switch is very likely produced impact by the action of heavy load switch, as shown in Figure 1.The DC source DC positive pole of this circuit and the first switch positive contact of F01 automatically, the second positive contact automatically switching F02 connect；The first positive contact automatically switching F01 and the first Current Limiting Diodes D1, heavy load connect；Current Limiting Diodes D1 is connected with little load；The second positive contact automatically switching F02 is accessed between the first Current Limiting Diodes D1 and little load by the second Current Limiting Diodes D2；The negative pole of heavy load, little load negative pole all automatically switch negative contact one end of F01, second negative contact one end automatically switching F02 are connected with first；First switchs the negative contact other end of F01, the second automatic negative contact other end access DC power cathode switching F02 automatically.
Assuming to protect and control to supply electricity to little load and heavy load with switch F01 automatically, switch F02 is in order to protect the little load of disjunction (F01 protects breaking current more than F02) automatically.When F02 is kept closed, when F01 is from disjunction to Guan Bi conversion, negative contact lags behind positive contact in short-term, and (because automatically switching self reason, there is Microsecond grade in positive and negative contact, even Millisecond is asynchronous), big/little load total current will be back to power cathode by the negative contact of F02.But, owing to F02 protects breaking current relatively low, by " improper protection " tripping, use to circuit and impact.
Otherwise, under the premise of F02 Guan Bi, F01 is converted to disconnection position from Guan Bi position, disconnects when positive contact lags behind negative contact, there is also above-mentioned risk.As shown in Figure 2.
Summary of the invention
Technical problem to be solved in the utility model is, not enough for prior art, it is provided that a kind of plural parallel stage power supply circuits.
For solving above-mentioned technical problem, this utility model be the technical scheme is that a kind of plural parallel stage power supply circuits, including DC source；Described DC power anode and the first positive contact of switch automatically, the second positive contact automatically switched connect；The first positive contact automatically switched and the first Current Limiting Diodes, heavy load connect；Current Limiting Diodes is connected with little load；The second positive contact automatically switched is accessed between the first Current Limiting Diodes and little load by the second Current Limiting Diodes；The negative pole of heavy load, little load negative pole all with first automatically negative contact one end of switch, the second switch automatically negative contact one end be connected；The first negative contact other end automatically switched, the second negative contact other end automatically switched access DC power cathode；The negative pole of described little load is connected to and to Guan Bi or is back to the blocking vessel of described DC power cathode from blocking described large load current when being closed into disjunction from disjunction for automatically switching described first.
Blocking vessel of the present utility model is one-way conduction diode；Described little load negative pole is connected with described one-way conduction diode anode；Negative contact one end of described one-way conduction diode cathode and first switch automatically connects.Use one-way conduction diode structure simple, it is achieved convenient.
Compared with prior art, the had the beneficial effect that this utility model of this utility model can solve multi-stage protection used in parallel time the negative pole string risk brought, it is possible to avoid double-pole switch surprisingly to disconnect, improve the effectiveness of circuit work, reliability；Circuit structure is simple, it is easy to realizes, has higher practical value.
Accompanying drawing explanation
Fig. 1 is existing plural parallel stage power supply circuits schematic diagram；
Fig. 2 is existing plural parallel stage power supply circuits F02 Guan Bi, and F01 is converted to current trend schematic diagram when disconnecting position from Guan Bi position；
Fig. 3 is this utility model one embodiment circuit theory diagrams；
Fig. 4 is this utility model F02 Guan Bi, and F01 is converted to, from Guan Bi position, the current trend schematic diagram disconnecting position.
Detailed description of the invention
As it is shown on figure 3, this utility model embodiment concatenates one-way conduction diode D3, reconfiguration negative wire circuit at the negative pole of little load, it is prevented that string electricity situation occurs.
When F02 is kept closed, when F01 is from disjunction to Guan Bi, when the negative contact of F01 lags behind positive contact (Microsecond grade in short-term, even Millisecond), only little load current will be back to power cathode by the negative contact of F02, and heavy load blocks due to one-way conduction two diode, big electric current cannot be back to power cathode by F02.Now, owing to F02 due to little flowing through of load current " abnormal disjunction ", and then will not avoid the adverse effect brought to circuit use.
Otherwise, under the premise of F02 Guan Bi, F01 is converted to disconnection position from Guan Bi position, when positive contact lags behind the risk that negative contact disconnection causes, is also avoided by (see figure 4).
Claims (2)
1. plural parallel stage power supply circuits, including DC source；Described DC power anode and the first positive contact of switch automatically, the second positive contact automatically switched connect；The first positive contact automatically switched and the first Current Limiting Diodes, heavy load connect；Current Limiting Diodes is connected with little load；The second positive contact automatically switched is accessed between the first Current Limiting Diodes and little load by the second Current Limiting Diodes；The negative pole of heavy load, little load negative pole all with first automatically negative contact one end of switch, the second switch automatically negative contact one end be connected；The first negative contact other end automatically switched, the second negative contact other end automatically switched access DC power cathode；It is characterized in that, the negative pole of described little load is connected to and to Guan Bi or is back to the blocking vessel of described DC power cathode from blocking described large load current when being closed into disjunction from disjunction for automatically switching described first.
2. plural parallel stage power supply circuits according to claim 1, it is characterised in that described blocking vessel is one-way conduction diode；Described little load negative pole is connected with described one-way conduction diode anode；Negative contact one end of described one-way conduction diode cathode and first switch automatically connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620149319.5U CN205407256U (en) | 2016-02-29 | 2016-02-29 | Multi -stage parallel connection supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620149319.5U CN205407256U (en) | 2016-02-29 | 2016-02-29 | Multi -stage parallel connection supply circuit |
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| Publication Number | Publication Date |
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| CN205407256U true CN205407256U (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620149319.5U Active CN205407256U (en) | 2016-02-29 | 2016-02-29 | Multi -stage parallel connection supply circuit |
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| CN (1) | CN205407256U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890774A (en) * | 2019-12-06 | 2020-03-17 | 中国科学院微小卫星创新研究院 | Device for protecting discharge switch of satellite storage battery and operation method thereof |
| CN112186732A (en) * | 2020-10-26 | 2021-01-05 | 国网江苏省电力有限公司电力科学研究院 | Switching circuit, switching device and control method for low-voltage bipolar power supply system |
-
2016
- 2016-02-29 CN CN201620149319.5U patent/CN205407256U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110890774A (en) * | 2019-12-06 | 2020-03-17 | 中国科学院微小卫星创新研究院 | Device for protecting discharge switch of satellite storage battery and operation method thereof |
| CN110890774B (en) * | 2019-12-06 | 2022-03-15 | 中国科学院微小卫星创新研究院 | Device for protecting discharge switch of satellite storage battery and operation method thereof |
| CN112186732A (en) * | 2020-10-26 | 2021-01-05 | 国网江苏省电力有限公司电力科学研究院 | Switching circuit, switching device and control method for low-voltage bipolar power supply system |
| CN112186732B (en) * | 2020-10-26 | 2023-03-31 | 国网江苏省电力有限公司电力科学研究院 | Switching circuit, switching device and control method for low-voltage bipolar power supply system |
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