CN207283213U - A kind of circuit structure of hair cutter charger - Google Patents
A kind of circuit structure of hair cutter charger Download PDFInfo
- Publication number
- CN207283213U CN207283213U CN201721233053.3U CN201721233053U CN207283213U CN 207283213 U CN207283213 U CN 207283213U CN 201721233053 U CN201721233053 U CN 201721233053U CN 207283213 U CN207283213 U CN 207283213U
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- China
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- circuit
- input
- isolating transformer
- pwm controller
- hair cutter
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Abstract
The utility model discloses a kind of circuit structure of hair cutter charger, including input rectifying filter circuit, start-up circuit, PWM controller, PSR feedback, switching tube, isolating transformer and output rectifier and filter；The input termination AC input of input rectifying filter circuit, the output terminal of input rectifying filter circuit connect the primary of isolating transformer and the input terminal of start-up circuit respectively；The primary connection of isolating transformer is built in the switching tube of PWM controller, the secondary connection output rectifier and filter of isolating transformer, and the magnetic core dispensing of isolating transformer is fixed；The input terminal of the output terminal connection PWM controller of start-up circuit, the output terminal connecting valve pipe of PWM controller；PSR feedback link PWM controllers.The utility model make it that operating noise is smaller, meanwhile, stable work in work.
Description
Technical field
Hair cutter charger technologies field is the utility model is related to, refers in particular to a kind of circuit knot of hair cutter charger
Structure.
Background technology
Stepped up as domestic consumption is horizontal, more and more families recognize to get a haircut at home when being a kind of health
Life style still, consumption idea are gradually converted to healthy emphatically from exquisite fashion, and purchase one is the dedicated hair cutter of family,
One of indispensable standard configuration as numerous emerging residential care electric appliances, and the accessory that charger is hair cutter.
When designing the charger of hair cutter, the noise of charger must control well, make its work quiet.The prior art
In, the transformer TR of charger is fixed by the way of vacuum impregnation, and plug-in unit capacitance is all porcelain Jie's formula of selection.Through
Test is crossed, the noise of charger at work is mainly derived from the plug-in unit capacitance on transformer TR and circuit board.The work of controller
Working frequency is 50KHz or so, and transformer TR and plug-in unit capacitance easily send noise because of resonance.
In view of this, the utility model develops a kind of circuit structure for the hair cutter charger for overcoming the defect, this
Thus case produces.
Utility model content
The purpose of this utility model is to provide a kind of circuit structure of hair cutter charger so that and operating noise is smaller,
Meanwhile stable work in work.
In order to achieve the above objectives, the solution of the utility model is：
A kind of circuit structure of hair cutter charger, including input rectifying filter circuit, start-up circuit, PWM controller,
PSR feedbacks, switching tube, isolating transformer and output rectifier and filter；The input termination AC input of input rectifying filter circuit,
The output terminal of input rectifying filter circuit connects the primary of isolating transformer and the input terminal of start-up circuit respectively；Isolating transformer
Primary connection be built in the switching tube of PWM controller, the secondary connection output rectifier and filter of isolating transformer, isolation becomes
The magnetic core dispensing of depressor is fixed；The input terminal of the output terminal connection PWM controller of start-up circuit, the output terminal of PWM controller connect
Connect switching tube；PSR feedback link PWM controllers.
Further, the armature winding interlayer of isolating transformer sets at least two layers of adhesive tape.
Further, the input front end of input rectifying filter circuit sets protection circuit.
After using the above scheme, the primary connection of the utility model isolating transformer is built in the switching tube of PWM controller,
The secondary connection output rectifier and filter of isolating transformer, the magnetic core dispensing of isolating transformer are fixed, and substitute prior art TR
Magnetic core use vacuum impregnation fixed form, structure glue can more preferable fixed magnetic core, so as to avoid low-frequency vibration so that work
Noise is smaller.
Under normal conditions, the operating voltage of PWM controller is between 8V-28V, the too high overvoltage that can be triggered inside IC of voltage
Protection, voltage is too low, triggers under-voltage protection, when the timing of the turn ratio one, when being operated in CV0.5V patterns, since output voltage is only
0.5V, easily triggers the under-voltage protection inside IC, causes to export standby cut-out.If improving transformer turns ratio, although can be to avoid
The threshold values of under-voltage protection is triggered, but over-voltage protection point just becomes very sensitive.The armature winding of the utility model isolating transformer
Interlayer sets at least two layers of adhesive tape, primary layer capacitance is reduced, so as to improve the coefficient of coup of transformer.Coupling between primary and secondary
Conjunction property improves, and when output voltage changes between 0.5V to 3.8V, the operating voltage of PWM controller can be maintained at 8-28V
Between without trigger protection, stable work in work.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the circuit diagram of the utility model.
Label declaration
1 start-up circuit 2 of input rectifying filter circuit
3 PSR of PWM controller feedbacks 4
5 isolating transformer 6 of switching tube
Output rectifier and filter 7 protects circuit 8.
Embodiment
The utility model is described in detail below in conjunction with drawings and the specific embodiments.
Please refer to Fig.1 and Fig. 2 described in, a kind of circuit structure for hair cutter charger that the utility model discloses is including defeated
Enter current rectifying and wave filtering circuit 1, start-up circuit 2, PWM controller 3, PSR feedbacks 4, switching tube 5, isolating transformer 6 and output rectification filter
Wave circuit 7.
The input termination AC input of input rectifying filter circuit 1, the output terminal of input rectifying filter circuit 1 connect respectively every
From the primary of transformer 6 and the input terminal of start-up circuit 2；The primary connection of isolating transformer 6 is built in opening for PWM controller 3
Pipe 5, the secondary connection output rectifier and filter 7 of isolating transformer 6 are closed, the magnetic core dispensing of isolating transformer 6 is fixed, substituted existing
Have a fixed form that technology TR magnetic cores use vacuum impregnation, structure glue can more preferable fixed magnetic core, so as to avoid low-frequency vibration,
So that operating noise is smaller.
Meanwhile in the circuit structure of charger, Leaded Ceramic Disc Capacitor is replaced using thin-film capacitor, the stability of thin-film capacitor with can
By property all on Leaded Ceramic Disc Capacitor.
The input terminal of the output terminal connection PWM controller 3 of start-up circuit 2, the output terminal connecting valve pipe of PWM controller 3
5.4 connection PWM controller 3 of PSR feedbacks.
Under normal conditions, the operating voltage of PWM controller is between 8V-28V, the too high overvoltage that can be triggered inside IC of voltage
Protection, voltage is too low, triggers under-voltage protection, when the timing of the turn ratio one, when being operated in CV0.5V patterns, since output voltage is only
0.5V, easily triggers the under-voltage protection inside IC, causes to export standby cut-out.If improving transformer turns ratio, although can be to avoid
The threshold values of under-voltage protection is triggered, but over-voltage protection point just becomes very sensitive.
The armature winding interlayer of the utility model isolating transformer 6 sets at least two layers of adhesive tape, reduces primary layer capacitance,
So as to improve the coefficient of coup of transformer.Coupling between primary and secondary improves, when output voltage becomes between 0.5V to 3.8V
When dynamic, the operating voltage of PWM controller can be maintained between 8-28V without trigger protection, stable work in work.
In the present embodiment, the input front end of input rectifying filter circuit 1 sets protection circuit 8, i.e., in AC input and input
Protection circuit 8 is set between current rectifying and wave filtering circuit 1.
The above is only the preferred embodiment of the present invention, not to the limitation of this case design, all setting according to this case
The crucial equivalent variations done of meter, each fall within the protection domain of this case.
Claims (3)
- A kind of 1. circuit structure of hair cutter charger, it is characterised in that：Including input rectifying filter circuit, start-up circuit, PWM Controller, PSR feedbacks, switching tube, isolating transformer and output rectifier and filter；The input termination of input rectifying filter circuit AC input, the output terminal of input rectifying filter circuit connect the primary of isolating transformer and the input terminal of start-up circuit respectively；Every Primary connection from transformer is built in the switching tube of PWM controller, the secondary connection output rectification filter electricity of isolating transformer Road, the magnetic core dispensing of isolating transformer are fixed；The input terminal of the output terminal connection PWM controller of start-up circuit, PWM controller Output terminal connecting valve pipe；PSR feedback link PWM controllers.
- A kind of 2. circuit structure of hair cutter charger as claimed in claim 1, it is characterised in that：The primary of isolating transformer Winding interlayer sets at least two layers of adhesive tape.
- A kind of 3. circuit structure of hair cutter charger as claimed in claim 1, it is characterised in that：Input rectifying filter circuit Input front end set protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721233053.3U CN207283213U (en) | 2017-09-25 | 2017-09-25 | A kind of circuit structure of hair cutter charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721233053.3U CN207283213U (en) | 2017-09-25 | 2017-09-25 | A kind of circuit structure of hair cutter charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207283213U true CN207283213U (en) | 2018-04-27 |
Family
ID=61982902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721233053.3U Active CN207283213U (en) | 2017-09-25 | 2017-09-25 | A kind of circuit structure of hair cutter charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207283213U (en) |
-
2017
- 2017-09-25 CN CN201721233053.3U patent/CN207283213U/en active Active
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