CN202190095U - Nonpolarity short-circuit protection charger circuit - Google Patents
Nonpolarity short-circuit protection charger circuit Download PDFInfo
- Publication number
- CN202190095U CN202190095U CN2011202557454U CN201120255745U CN202190095U CN 202190095 U CN202190095 U CN 202190095U CN 2011202557454 U CN2011202557454 U CN 2011202557454U CN 201120255745 U CN201120255745 U CN 201120255745U CN 202190095 U CN202190095 U CN 202190095U
- Authority
- CN
- China
- Prior art keywords
- circuit
- current
- charging
- short
- nonpolarity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a nonpolarity short-circuit protection charger circuit which belongs to the field of battery charging circuits. The technical scheme is that the output end of a power transformer is connected with a charging circuit, and the charging circuit is characterized in that two one-way silicon controlled rectifiers are reversely connected in parallel, then connected between one end of an output coil of the transformer and a charging joint M in series, and form a polarity identification circuit with a photocoupler IC (integrated circuit) and current-limiting resistors R1, R2 and R3. The control electrodes of the two silicon controlled rectifiers and the current-limiting resistors R1 and R2 are connected on the anodes through an inner switch of the photocoupler IC, are connected in parallel in the direction of a diode in the photocoupler and then are connected on the M and N poles interfaces with the current-limiting resistor R3, and the N pole is connected with the other end of a secondary coil.
Description
Technical field:
The nonpolarity short-circuit protection charger circuit in the utility model design battery charger field.
Background technology:
Various on the market at present chargers are various in style, are exactly that the correct polarity that must aim at battery connects but all exist a common characteristic, otherwise will burn charger or battery.
The utility model content:
The purpose of the utility model is exactly the defective that exists to prior art, and a kind of charger circuit of nonpolarity short-circuit protection of automatic identification polarity is provided.
Its technical scheme is to connect charging circuit from power transformer B output, and charging circuit is to be connected on behind two one-way SCR reverse parallel connections between secondary coil one end and the charging connector and optocoupler IC and current-limiting resistance R again
1, R
2, R
3Form polarity identification circuit.The two SCR control utmost points are through IC optocoupler internal switch and current-limiting resistance (R
1, R
2) be connected on the anode, in the optocoupler after the diode reverse parallel connection with current-limiting resistance R
3Be serially connected between M, the N joint, the N joint links to each other with the secondary output winding other end.M, when N does not have the battery of connecing, T
1, T
2All do not have controlled electrode current, M, N joint with regard to no-voltage output, just can not damage charger during short circuit yet yet, do not consider battery polar during charging yet, and careless connection all can charge normal battery, and this circuit structure is simple, and is easy to use.
Description of drawings:
Accompanying drawing is the circuit theory diagrams of a kind of embodiment, and IN is two terminal electrodes that power supply input M, N export for charging among the figure.
Embodiment:
Further describing circuit below in conjunction with accompanying drawing constitutes and operation principle:
Two one-way SCR (T
1, T
2) be serially connected in transformer B behind the reverse parallel connection and export between an end and the charging connector, with optocoupler IC and current-limiting resistance R
1, R
2, R
3Form the polarity identification rectification circuit.The two SCR control utmost points are through IC optocoupler internal switch and current-limiting resistance (R
1, R
2) be connected on the anode, in the optocoupler after the diode reverse parallel connection with current-limiting resistance R
3Be serially connected between M, the N joint, charging connector N links to each other with the secondary output winding other end.Work as M during charging and connect anode, N connects negative pole, and electric current is by M → R
3→ IC1 pin → IC2 pin → N → M, optocoupler IC7,8 pin conductings at this moment, electric current passes through R
1To T
1The controlled utmost point provides synchronous triggering voltage (electric current), T
1Conducting, M utmost point output positive voltage, charging operate as normal, T
2Do not have controlled electrode current and end, when the N utmost point connects anode, M connects negative pole, and electric current is by N → IC3 pin → IC4 pin → R
3→ M negative pole, optocoupler 6,5 pin conductings at this moment, electric current passes through R
2To T
2The controlled utmost point provides the voltage that sets out synchronously (electric current), T
2Controlled electrode current is arranged and conducting, N utmost point output positive voltage charging operate as normal, and T
1Do not have controlled electrode current and end.There is not when connecing battery T
1, T
2Do not have controlled electrode current and end, thereby can not damage charger when M, N short circuit yet, played the effect of polarity identification and short-circuit protection.Corresponding 7,8 foot controls of optocoupler 1,2 pin, corresponding 5,6 foot controls of 3,4 pin.
Claims (1)
1. nonpolarity short-circuit protection charger; It is characterized in that: connect charging circuit from power transformer B output; After charging circuit is two one-way SCR reverse parallel connections, be connected between transformer secondary output coil one end and the charging connector M again and optocoupler IC and current-limiting resistance R
1, R
2, R
3Form polarity identification circuit, the two SCR control utmost points are through IC optocoupler internal switch and current-limiting resistance (R
1, R
2) be connected on the anode, in the optocoupler after the diode reverse parallel connection with current-limiting resistance R
3Be connected between M, the N joint, the N joint links to each other with the inferior utmost point output winding other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202557454U CN202190095U (en) | 2011-07-18 | 2011-07-18 | Nonpolarity short-circuit protection charger circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202557454U CN202190095U (en) | 2011-07-18 | 2011-07-18 | Nonpolarity short-circuit protection charger circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202190095U true CN202190095U (en) | 2012-04-11 |
Family
ID=45921528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202557454U Expired - Fee Related CN202190095U (en) | 2011-07-18 | 2011-07-18 | Nonpolarity short-circuit protection charger circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202190095U (en) |
-
2011
- 2011-07-18 CN CN2011202557454U patent/CN202190095U/en not_active Expired - Fee Related
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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: 20120411 Termination date: 20120718 |