CN2288540Y - Miniature charger for non-power frequency transformer - Google Patents
Miniature charger for non-power frequency transformer Download PDFInfo
- Publication number
- CN2288540Y CN2288540Y CN96234690U CN96234690U CN2288540Y CN 2288540 Y CN2288540 Y CN 2288540Y CN 96234690 U CN96234690 U CN 96234690U CN 96234690 U CN96234690 U CN 96234690U CN 2288540 Y CN2288540 Y CN 2288540Y
- Authority
- CN
- China
- Prior art keywords
- output
- circuit
- frequency transformer
- charger
- pulse transformer
- 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
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a miniature charger for a non-power frequency transformer, which is composed of an outer shell, an input end for commercial power, a battery card for charge current output and a circuit board. The utility model is characterized in that a control circuit for power supply changeover is arranged on the circuit board; an output and an input ends thereof are isolated. The utility model has the advantages of simple structure and reliable work. An industrial frequency transformer is omitted in the circuit. The size is small; the cost is lower; the carrying is convenient. An input end for commercial power thereof and an output end of pulse current are isolated; the use is safe. The output can adopt the pulse current; the charging effect is better; the utility model is suitable for charging for small secondary batteries.
Description
A kind of no industrial frequency transformer mini charger belongs to the circuit arrangement that is used for batteries charging.
Present employed small charger, its structure be mostly by Industrial Frequency Transformer and rectification circuit be combined into, has that efficient is low, volume big, carry inconvenience.CN2178016Y discloses a kind of New-type charge device, between the anode of battery E and output, be serially connected with resistance R and diode D by C, R voltage divider, make the negative half period of 220V alternating current after C, the step-down of R voltage divider, resistance and diode pair battery through being connected in series carry out reverse charging.Though no industrial frequency transformer in the circuit is simple in structure, poor stability, the effect of charging is not good enough yet.
The purpose of this utility model is to provide a kind of no industrial frequency transformer mini charger of simple in structure, reliable operation.
The utility model is to realize above-mentioned purpose like this.Charger is made up of battery card, the circuit board of shell, mains electricity input end, output charging current.The power source conversion control circuit is arranged on the circuit board, comprise the current limliting Resistor-Capacitor Unit and the high frequency electric source change-over circuit of restriction charger operate as normal power, in the high frequency electric source change-over circuit pulse transformer is arranged, its output is isolated with input.
The utlity model has simple in structure, the characteristics of reliable operation.Saved Industrial Frequency Transformer in the circuit, had that volume is little, cost is low, be convenient for carrying; Its mains electricity input end and pulse current output are isolated, safe in utilization; The output of employing pulse current can make charging effect better, is suitable for doing the charger of small-sized secondary batteries charging.
Accompanying drawing is an electrical schematic diagram of the present utility model.Its circuit connecting relation is: civil power is through resistance R
1, R
2Input is through diode D
1Rectification and voltage-stabiliser tube D
2After the pressure limiting, positive pole is connected to the centre tap of pulse transformer B primary coil, and negative pole is connected to the emitter of triode BG, and collector electrode then is connected with the end of pulse transformer B, and the other end passes through resistance R
3Be connected to the base stage of triode BG; Pulse transformer B's is secondary, through diode D
3Be connected to output after the rectification.
Embodiment of the present utility model is of a size of 90 * 40 * 28mm for the mini charger for 5, No. 7 secondary cell charges, and component parameters is as follows:
R
1, R
25-30 kilo-ohm, 1/2W D
11N4007
R
347-100 kilo-ohm, 1/8W D
21W, 72V
BG NPN type high inverse-voltage tube D
31N4148
Claims (2)
1, a kind of by shell, mains electricity input end, the battery card of output charging current, the no industrial frequency transformer mini charger that circuit board is formed, it is characterized in that: the power source conversion control circuit is arranged on the circuit board, comprise current limliting Resistor-Capacitor Unit and high frequency electric source change-over circuit to restriction charger operate as normal power, in the high frequency electric source change-over circuit pulse transformer is arranged, its output is isolated with input.
2, a kind of no industrial frequency transformer mini charger according to claim 1, it is characterized in that: the circuit connecting relation of power source conversion control circuit is that civil power is through resistance R
1And R
2Input is through diode D
1Rectification and voltage-stabiliser tube D
2After the pressure limiting, positive pole is connected to the centre tap of pulse transformer B primary coil, and negative pole is connected to the emitter of triode BG, and collector electrode then is connected with the end of pulse transformer B, and the other end passes through resistance R
3Be connected to the base stage of triode BG; Pulse transformer B's is secondary, through diode D
3Be connected to output after the rectification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96234690U CN2288540Y (en) | 1996-04-20 | 1996-04-20 | Miniature charger for non-power frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96234690U CN2288540Y (en) | 1996-04-20 | 1996-04-20 | Miniature charger for non-power frequency transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2288540Y true CN2288540Y (en) | 1998-08-19 |
Family
ID=33910989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96234690U Expired - Fee Related CN2288540Y (en) | 1996-04-20 | 1996-04-20 | Miniature charger for non-power frequency transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2288540Y (en) |
-
1996
- 1996-04-20 CN CN96234690U patent/CN2288540Y/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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |