CN2257104Y - Frequency-changing isolation reducing transformer - Google Patents
Frequency-changing isolation reducing transformer Download PDFInfo
- Publication number
- CN2257104Y CN2257104Y CN 95240366 CN95240366U CN2257104Y CN 2257104 Y CN2257104 Y CN 2257104Y CN 95240366 CN95240366 CN 95240366 CN 95240366 U CN95240366 U CN 95240366U CN 2257104 Y CN2257104 Y CN 2257104Y
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- China
- Prior art keywords
- pin
- transformer
- transistor
- output
- power supply
- 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 frequency-changing isolation pressure reducer which is composed of a filter circuit, a rectifying oscillation circuit, and an isolation voltage transforming circuit. All electronic component devices are arranged in a housing made of flame resistant material, only input plugs are used for connecting the socket of an external power supply without using power supply leading wires, and output low voltage is connected with loads through leading wires. The utility model has the advantages of small size, light weight, favorable performance and reliability, low manufacturing cost and is an ideal pressure reducing device.
Description
The utility model belongs to the application of electronic technology field.
At present used reducing transformer in the domestic market is a kind of power frequency reducing transformer, and it only utilizes transformer to reduce voltage, and volume is big, external form is heavy, cost is high, performance and reliability are all poor.
The purpose of this utility model provides a kind of frequency conversion isolated buck device, and it has, and volume is little, in light weight, low-voltage, high-power, performance and reliability is all good, low cost of manufacture.
The utility model is made up of filter circuit (L1, L2, Rt, F1), rectification oscillating circuit (Ic, BG1, BG2, F2), isolation transforming circuit (B, F3); Between the 2nd pin of inductor L1 in the filter circuit and the A end that is connected across power supply Vac after thermal resistor Rt, fuse F1 connect and integrated package Ic, the C that inductor L2 is connected across power supply Vac hold and integrated package Ic the 1st pin between; The 3rd pin of integrated package Ic in the rectification oscillating circuit meets the collector electrode C1 of transistor BG1, the 4th of Ic, 5 pin meet transistor BG1 respectively, the base stage b1 of BG2, b2, the 7th pin of Ic and the emitter e 1 of transistor BG1, the collector electrode C2 of transistor BG2 is connected, the 9th pin of Ic meets the collector electrode C2 of transistor BG2, the 6th pin of Ic connects the 1 elementary end of transformer B of isolating in the transforming circuit, the 8th pin of Ic is connected by 2 elementary ends of fuse F2 and transformer B, 3 termination output D of B level of transformer, 4 ends of B level of transformer, be connected with output E by fuse F3, the G point is the tap of B level of transformer, isolate B the level of transformer in the transforming circuit, can be according to the size of output voltage, adopt many tapping points to obtain different output voltages, all electronics devices of frequency conversion isolated buck device in the housing that fire proofing is made to form an integral body, only connect external power receptacle with the input plug without power supply lead wire, the low-voltage of output connects load by lead-in wire.
The utility model converts power frequency to low frequency, and volume is little, in light weight, performance and good reliability, and low cost of manufacture is desirable low-voltage, powerful frequency conversion isolated buck device.
Accompanying drawing is the utility model electrical schematic diagram.
Among the figure: L1, L2 are that transformer, Rt are that thermistor, F1, F2, F3 are that fuse, BG1, BG2 are transistor for band core inductor, B, and model 2SD, Ic are integrated circuit block, model: WH888, R are load.
Now in conjunction with the accompanying drawings the utility model has been done further introduction:
Press the frequency conversion isolated buck device of accompanying drawing assembling, its all electronics devices in the housing that fire proofing is made to form an integral body, without power supply lead wire, input adopts the plug mode to be connected with power supply, the low-voltage of output connects load by lead-in wire, after connecting city's AC power, at first pass through inductor L1, the filtering of L2, then with voltage after the filtering, by the integrated package Ic in the rectification oscillating circuit, transistor BG1, BG2 produces the low-frequency voltage greater than power frequency, through the step-down of transformer B, be supplied to load R to obtain low-frequency LVPS, as household electrical appliance such as electric blankets.
Claims (2)
1, a kind of frequency conversion isolated buck device is characterized in that: it is made up of filter circuit (L1, L2, Rt, F1), rectification oscillating circuit (Ic, BG1, BG2, F2), isolation transforming circuit (B, F3); Between the 2nd pin of inductor L1 in the filter circuit and the A end that is connected across power supply Vac after thermal resistor Rt, fuse F1 connect and integrated package Ic, the C that inductor L2 is connected across power supply Vac hold and integrated package Ic the 1st pin between; The 3rd pin of integrated package Ic in the rectification oscillating circuit meets the collector electrode C1 of transistor BG1, the 4th of Ic, 5 pin meet transistor BG1 respectively, the base stage b1 of BG2, b2, the 7th pin of Ic and the emitter e 1 of transistor BG1, the collector electrode C2 of transistor BG2 is connected, the 9th pin of Ic meets the collector electrode C2 of transistor BG2, the 6th pin of Ic connects the 1 elementary end of transformer B of isolating in the transforming circuit, the 8th pin of Ic is connected by 2 elementary ends of fuse F2 and transformer B, 3 termination output D of B level of transformer, 4 ends of B level of transformer, be connected with output E by fuse F3, the G point is the tap of B level of transformer, and load R is connected across output D, between the E.
2, frequency conversion isolated buck device according to claim 1 is characterized in that: isolate B the level of transformer in the transforming circuit, can adopt many tapping points to obtain different output voltages according to the size of output voltage; All electronics devices of frequency conversion isolated buck device to form an integral body, without power supply lead wire, only connect external power receptacle with the input plug in the housing that fire proofing is made, the low-voltage of output meets load R by lead-in wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240366 CN2257104Y (en) | 1995-08-17 | 1995-08-17 | Frequency-changing isolation reducing transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95240366 CN2257104Y (en) | 1995-08-17 | 1995-08-17 | Frequency-changing isolation reducing transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2257104Y true CN2257104Y (en) | 1997-06-25 |
Family
ID=33881962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95240366 Expired - Fee Related CN2257104Y (en) | 1995-08-17 | 1995-08-17 | Frequency-changing isolation reducing transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2257104Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944719A (en) * | 2012-11-16 | 2013-02-27 | 大连丰和日丽电气有限公司 | Passive direct-current voltage transducer |
-
1995
- 1995-08-17 CN CN 95240366 patent/CN2257104Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944719A (en) * | 2012-11-16 | 2013-02-27 | 大连丰和日丽电气有限公司 | Passive direct-current voltage transducer |
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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 |