CN201194326Y - Protection apparatus preventing reverse connection for DC power source - Google Patents
Protection apparatus preventing reverse connection for DC power source Download PDFInfo
- Publication number
- CN201194326Y CN201194326Y CNU2008200176600U CN200820017660U CN201194326Y CN 201194326 Y CN201194326 Y CN 201194326Y CN U2008200176600 U CNU2008200176600 U CN U2008200176600U CN 200820017660 U CN200820017660 U CN 200820017660U CN 201194326 Y CN201194326 Y CN 201194326Y
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- China
- Prior art keywords
- load output
- direct current
- utility
- reverse connection
- model
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Abstract
The utility model relates to a direct current power anti-reverse connection protective apparatus, which comprises a direct current power input terminal, a load output terminal and an overcurrent protector connected between the direct current power input terminal and the load output terminal. The utility model is characterized in that the load output terminal is parallel with a unilateral diode, and the overcurrent protector is serially connected to the circuit between the direct current input terminal and the unilateral diode. According to the utility model, only two parts are used for solving the reverse connection problem of direct current power, the structure is simple, safe and reliable, and the production cost is greatly reduced.
Description
Technical field
The utility model relates to the anti-reverse protective device of a kind of DC power supply.
Background technology
DC power supply in use wants strictness to prevent to connect instead, once power supply connects instead, is easy to load is burnt.Burn load in order to prevent that power supply from connecing anti-the time, need increase the reverse connecting protection device usually in DC power-supply circuit, existing reverse connecting protection device is complex structure, failure rate height, production cost height not only, and reliability is also poor.
Summary of the invention
The purpose of this utility model provides the anti-reverse protective device of a kind of DC power supply simple in structure, that production cost is low, reliability is high.
For achieving the above object, the utility model adopts following technical scheme:
The anti-reverse protective device of DC power supply described in the utility model; comprise dc supply input, load output and be connected dc supply input and the load output between overcurrent protector; it is characterized in that: be parallel with unilateral diode on the load output, overcurrent protector is connected in the circuit between dc supply input and the unilateral diode.
The utility model has only solved DC power supply reverse connecting protection problem with two parts, and simple in structure, safe and reliable, production cost reduces significantly.
Description of drawings
Accompanying drawing is the structural representation of an embodiment of the utility model.
Embodiment
As shown in drawings, the anti-reverse protective device of DC power supply described in the utility model comprise dc supply input 1, load output 2 and be connected dc supply input 1 and load output 2 between overcurrent protector 3.Overcurrent protector 3 can adopt existing overcurrent protective device, and its operating current determines according to the size of load current, the maximum current in the time of at least should be greater than the load operate as normal.Be parallel with unilateral diode D on load output 2, the withstand voltage of unilateral diode D determines that according to working power voltage its operating current at least should be greater than the operating current of overcurrent protector 3.Overcurrent protector 3 is connected in the circuit between dc supply input 1 and the unilateral diode D, can be connected on power positive end as shown in drawings, also can be connected on the negative pole end of power supply.
When the power supply connection is correct; electric current is loaded into the two ends of load output 2 and unilateral diode D by overcurrent protector 3; at this moment; because the unilateral conduction of unilateral diode D; unilateral diode D ends; can be considered as the resistance infinity, electric current is all by load output 2 powering loads.
When power supply connects anti-the time, unilateral diode D conducting, instantaneous large-current makes overcurrent protector 3 actions, cuts off the electricity supply, and reaches the effect of protection load.
The structure of overcurrent protector 3 is not described in detail in this for existing known technology.
Claims (1)
1. the anti-reverse protective device of DC power supply; comprise dc supply input (1), load output (2) and be connected dc supply input (1) and load output (2) between overcurrent protector (3); it is characterized in that: be parallel with unilateral diode (D) on the load output (2), overcurrent protector (3) is connected in the circuit between dc supply input (1) and the unilateral diode (D).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200176600U CN201194326Y (en) | 2008-02-15 | 2008-02-15 | Protection apparatus preventing reverse connection for DC power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200176600U CN201194326Y (en) | 2008-02-15 | 2008-02-15 | Protection apparatus preventing reverse connection for DC power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201194326Y true CN201194326Y (en) | 2009-02-11 |
Family
ID=40393858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200176600U Expired - Fee Related CN201194326Y (en) | 2008-02-15 | 2008-02-15 | Protection apparatus preventing reverse connection for DC power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201194326Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916995A (en) * | 2010-08-12 | 2010-12-15 | 三一重工股份有限公司 | Power supply reverse connection protection circuit |
| CN101949991A (en) * | 2010-09-30 | 2011-01-19 | 淮南市博泰矿山电器有限公司 | Closing control lead short-circuit detecting device |
-
2008
- 2008-02-15 CN CNU2008200176600U patent/CN201194326Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916995A (en) * | 2010-08-12 | 2010-12-15 | 三一重工股份有限公司 | Power supply reverse connection protection circuit |
| CN101949991A (en) * | 2010-09-30 | 2011-01-19 | 淮南市博泰矿山电器有限公司 | Closing control lead short-circuit detecting device |
| CN101949991B (en) * | 2010-09-30 | 2012-08-08 | 淮南市博泰矿山电器有限公司 | Closing control lead short-circuit detecting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090211 Termination date: 20110215 |