CN204248924U - A kind of electric hair cutter control circuit - Google Patents
A kind of electric hair cutter control circuit Download PDFInfo
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- CN204248924U CN204248924U CN201420689219.2U CN201420689219U CN204248924U CN 204248924 U CN204248924 U CN 204248924U CN 201420689219 U CN201420689219 U CN 201420689219U CN 204248924 U CN204248924 U CN 204248924U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The utility model provides a kind of electric hair cutter control circuit, belongs to the application in electric hair cutter field, and it comprises motor, treatment circuit, battery and battery protecting circuit; Described battery by battery protecting circuit to treatment circuit, drive circuitry; Described treatment circuit has voltage monitoring end, load monitoring end and PWM output; treatment circuit is gathered by voltage monitoring end voltage signal, the load current signal being gathered motor by load monitoring end that battery protecting circuit exports and controls the work of drive circuit drive motor by PWM output output pwm signal, and this pwm signal is produced according to the voltage signal gathered and load current signal by treatment circuit.Obviously, this control circuit structure is simple, easily realizes, and in addition, owing to adopting PWM to drive, has higher current conversion efficiency, is conducive to saving electric energy, extends service time of battery.
Description
Technical field
The utility model relates to a kind of control circuit, particularly a kind of electric hair cutter control circuit.
Background technology
Existing electric hair cutter adopts small-sized DC motor as power drive substantially, with rechargeable battery or disposable dry cell power supply.There are following 2 problems in existing scheme:
1, because existing battery technology limits, the platform voltage of battery discharge is stable not, that is: in battery discharge procedure, along with battery electric quantity constantly reduces, cell output voltage constantly reduces, and finally causes output power of motor non-constant;
2, the contradiction of motor outputting torsion and noise: in electric hair cutter application, if with larger electric current drive motors, when empty load of motor, noise and vibration clearly, reduce use level of comfort, if less electric current drive motors, not enough again at hair-cutting (increase load) process power.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of electric hair cutter control circuit, and this control circuit can solve the problem that power output is non-constant and noise is large simultaneously.
For solving the problem, the technical scheme that the utility model adopts is as follows:
A kind of electric hair cutter control circuit, comprises motor, treatment circuit, battery and battery protecting circuit; Described battery by battery protecting circuit to treatment circuit, drive circuitry; Described treatment circuit has voltage monitoring end, load monitoring end and PWM output; treatment circuit is gathered by voltage monitoring end voltage signal, the load current signal being gathered motor by load monitoring end that battery protecting circuit exports and controls the work of drive circuit drive motor by PWM output output pwm signal, and this pwm signal is produced according to the voltage signal gathered and load current signal by treatment circuit.
Preferably, described drive circuit comprises the first resistance, the second resistance, the 3rd resistance, diode, the first electric capacity and MOSFET;
One end of this first resistance is connected with PWM output, and the other end is connected with the grid of MOSFET;
One end of this second resistance is connected with the source electrode of MOSFET, other end ground connection;
One end of 3rd resistance is connected with the source electrode of MOSFET, and other end load monitoring end connects;
One end of this first electric capacity is connected with load monitoring end, other end ground connection;
The anode of this diode is connected with the negative input of motor, the negative electrode of diode is connected with the electrode input end of motor;
The drain electrode of this MOSFET is connected with the negative input of motor.
Preferably, described MOSFET is the MOSFET of N raceway groove.
Preferably, described battery is rechargeable battery.
Preferably, also comprise charging control circuit, rechargeable battery by battery protecting circuit and charging control circuit to treatment circuit, drive circuitry.
Preferably, described charging control circuit has the first power end, charged state indication end, charging complete indication end, charging current output, control end and the first earth terminal, and this charging control circuit is connected with the 4th resistance, the 5th resistance, the 6th resistance, the first light emitting diode, the second light emitting diode and the second electric capacity;
4th resistance, the 5th resistance are all connected with the first power end with one end of the second electric capacity;
The other end of the 4th resistance for accepting power supply, the other end ground connection of this second electric capacity;
The other end of the 5th resistance is connected with the anode of the first light emitting diode, the second light emitting diode, and the negative electrode of this first light emitting diode is connected with charged state indication end, and the negative electrode of this second light emitting diode is connected with charging complete indication end;
One end of 6th resistance is connected with control end, the other end of the 6th resistance and the first earth terminal common ground;
This charging current output is connected with the positive pole of rechargeable battery, and the positive pole of rechargeable battery is connected with the electrode input end of motor.
Preferably, described battery protecting circuit has second source end, the 3rd power end, the second earth terminal and protection end;
This second source end is connected with the 3rd electric capacity, and the other end of the 3rd electric capacity is all connected with the negative pole of rechargeable battery with the second earth terminal;
3rd power end is connected with the positive pole of rechargeable battery;
This protection end ground connection.
Compared to existing technology, the beneficial effects of the utility model are:
By gathering voltage signal and load current signal, appropriate pwm signal is exported with this, the stable not output power of motor caused of battery discharge platform voltage is solved non-constant with this, namely automatically drive current is increased when motor bringing onto load, guarantee enough Power output, automatically reduce drive current time unloaded, thus reduce noise.This control circuit structure is simple, easily realizes, and in addition, owing to adopting PWM to drive, has higher current conversion efficiency, is conducive to saving electric energy, extends service time of battery.
Accompanying drawing explanation
Fig. 1 is module diagram of the present utility model;
Fig. 2 is drive circuit connection diagram of the present utility model;
Fig. 3 is the connection diagram of the utility model charging control circuit and battery protecting circuit.
Reference numeral is as follows:
1, rechargeable battery; 2, motor; 3, drive circuit; 4, treatment circuit; 41, voltage monitoring end; 42, PWM output; 43, load monitoring end.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, electric hair cutter control circuit described in the utility model comprises motor 2, treatment circuit 4, charging control circuit, rechargeable battery 1 and battery protecting circuit; Described rechargeable battery 1 is powered to treatment circuit 4, drive circuit 3 by battery protecting circuit and charging control circuit; Described treatment circuit 4 has voltage monitoring end 41, load monitoring end 43 and PWM output 42, treatment circuit 4 is gathered voltage signal, the load current signal being gathered motor 2 by load monitoring end 43 that battery protecting circuit exports by voltage monitoring end 41 and is controlled drive circuit 3 drive motor 2 by PWM output 42 output pwm signal and works, and this pwm signal is produced according to the voltage signal gathered and load current signal by treatment circuit 4; Wherein, described treatment circuit 4 can be the STM8S003F of ST company, himself possesses PWM regulatory function, certainly, according to actual needs, selects other treatment circuits with PWM regulatory function also can.
As shown in Figure 2, described drive circuit 3 comprises the MOSFETQ1 of the first resistance R1, the second resistance R2, the 3rd resistance R3, diode D1, the first electric capacity C1 and N raceway groove; One end of this first resistance R1 is connected with PWM output 42, and the other end is connected with the grid of MOSFETQ1; One end of this second resistance R2 is connected with the source electrode of MOSFETQ1, other end ground connection; One end of 3rd resistance R3 is connected with the source electrode of MOSFETQ1, and other end load monitoring end 43 connects; One end of this first electric capacity C1 is connected with load monitoring end 43, other end ground connection; The anode of this diode D1 is connected with the negative input of motor, the negative electrode of diode D1 is connected with the electrode input end of motor; The drain electrode of this MOSFETQ1 is connected with the negative input of motor.
As shown in Figure 3, described charging control circuit U1 has the first power end VCC1, charged state indication end CHRG, charging complete indication end STDBY, charging current output BAT, control end PROG and the first earth terminal GND1, and this charging control circuit U1 is connected with the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the first light emitting diode DS1, the second light emitting diode DS2 and the second electric capacity C2; 4th resistance R4, the 5th resistance R5 are all connected with the first power end VCC1 with one end of the second electric capacity C2; The other end of the 4th resistance R4 for accepting power supply, the other end ground connection of this second electric capacity C2; The other end of the 5th resistance R5 is connected with the anode of the first light emitting diode DS1, the second light emitting diode DS2, the negative electrode of this first light emitting diode DS1 is connected with charged state indication end CHRG, and the negative electrode of this second light emitting diode DS2 is connected with charging complete indication end STDBY; One end of 6th resistance R6 is connected with control end PROG, the other end of the 6th resistance R6 and the first earth terminal GND1 common ground; This charging current output BAT is connected with the positive pole of rechargeable battery CDDC, and the positive pole of rechargeable battery CDDC is connected with the electrode input end of motor.Wherein, above-mentioned charging control circuit U1 can be TP4057; it is a complete single-unit lithium ion battery charged pool both positive and negative polarity reverse connecting protection, the linear charger adopting constant current/constant voltage; its SOT encapsulates and makes TP4057 become the ideal chose of portable use with less outer member number; the power work such as USB power source and adapter can be applicable to; when being applied to the utility model, the problem of existing electric clippers circuit protection difference more can be solved.
And described battery protecting circuit U2 has second source end VCC2, the 3rd power end VDD, the second earth terminal GND2 and protection end VM; This second source end VCC is connected with the 3rd electric capacity C3, and the other end of the 3rd electric capacity C3 is all connected with the negative pole of rechargeable battery CDDC with the second earth terminal GND2; 3rd power end VDD is connected with the positive pole of rechargeable battery CDDC; This protection end VM ground connection.Above-mentioned battery protecting circuit U2 can be XB5358A, and it is integrated with advanced power tube, and high-accuracy voltage detects and delay circuit.Described XB5358A is the packing forms of SOT23-5L, and only needs a peripheral components, and thickness is less than 0.8mm, is suitable for very much the battery protecting plate application of limited space, particularly some ultra-thin application.And XB5358 has the complete li-ion cell protection function such as over-charge protective, Cross prevention, overcurrent protection, short-circuit protection and support reversal connection, has very little operating current, can extend the life of a cell.In sum, in electric hair cutter, apply XB5358A is that battery protecting circuit is particularly suitable.
When utility model works, treatment circuit 4 produces different pwm signals according to the voltage signal gathered and load current signal, during as learnt that according to voltage signal rechargeable battery 1 voltage is higher, reduce the dutycycle of pwm signal, when rechargeable battery 1 voltage is lower, increase the dutycycle of pwm signal, or when learning that motor 2 load increases according to load current signal, increase the dutycycle of pwm signal, when motor 2 load reduces, reduce the dutycycle of pwm signal; By above-mentioned control mode, solve the stable not inconstant problem of output power of motor caused of battery discharge platform voltage, simultaneously, automatically drive current is increased when motor 2 bringing onto load, guarantee enough Power output, time unloaded, automatically reduce drive current, thus reduce noise.This control circuit structure is simple, easily realizes, and in addition, owing to adopting PWM to drive, has higher current conversion efficiency, is conducive to saving electric energy, extends service time of battery.
Above-mentioned embodiment is only preferred embodiment of the present utility model; can not limit the scope of the utility model protection with this, change and the replacement of any unsubstantiality that those skilled in the art does on basis of the present utility model all belong to the utility model scope required for protection.
Claims (7)
1. an electric hair cutter control circuit, is characterized in that: comprise motor, treatment circuit, battery and battery protecting circuit; Described battery by battery protecting circuit to treatment circuit, drive circuitry; Described treatment circuit has voltage monitoring end, load monitoring end and PWM output; treatment circuit is gathered by voltage monitoring end voltage signal, the load current signal being gathered motor by load monitoring end that battery protecting circuit exports and controls the work of drive circuit drive motor by PWM output output pwm signal, and this pwm signal is produced according to the voltage signal gathered and load current signal by treatment circuit.
2. electric hair cutter control circuit according to claim 1, is characterized in that: described drive circuit comprises the first resistance, the second resistance, the 3rd resistance, diode, the first electric capacity and MOSFET;
One end of this first resistance is connected with PWM output, and the other end is connected with the grid of MOSFET;
One end of this second resistance is connected with the source electrode of MOSFET, other end ground connection;
One end of 3rd resistance is connected with the source electrode of MOSFET, and other end load monitoring end connects;
One end of this first electric capacity is connected with load monitoring end, other end ground connection;
The anode of this diode is connected with the negative input of motor, the negative electrode of diode is connected with the electrode input end of motor;
The drain electrode of this MOSFET is connected with the negative input of motor.
3. electric hair cutter control circuit according to claim 2, is characterized in that: described MOSFET is the MOSFET of N raceway groove.
4. electric hair cutter control circuit according to claim 2, is characterized in that: described battery is rechargeable battery.
5. electric hair cutter control circuit according to claim 4, is characterized in that: also comprise charging control circuit, rechargeable battery by battery protecting circuit and charging control circuit to treatment circuit, drive circuitry.
6. electric hair cutter control circuit according to claim 5, it is characterized in that: described charging control circuit has the first power end, charged state indication end, charging complete indication end, charging current output, control end and the first earth terminal, and this charging control circuit is connected with the 4th resistance, the 5th resistance, the 6th resistance, the first light emitting diode, the second light emitting diode and the second electric capacity;
4th resistance, the 5th resistance are all connected with the first power end with one end of the second electric capacity;
The other end of the 4th resistance for accepting power supply, the other end ground connection of this second electric capacity;
The other end of the 5th resistance is connected with the anode of the first light emitting diode, the second light emitting diode, and the negative electrode of this first light emitting diode is connected with charged state indication end, and the negative electrode of this second light emitting diode is connected with charging complete indication end;
One end of 6th resistance is connected with control end, the other end of the 6th resistance and the first earth terminal common ground;
This charging current output is connected with the positive pole of rechargeable battery, and the positive pole of rechargeable battery is connected with the electrode input end of motor.
7. electric hair cutter control circuit according to claim 6, is characterized in that: described battery protecting circuit has second source end, the 3rd power end, the second earth terminal and protection end;
This second source end is connected with the 3rd electric capacity, and the other end of the 3rd electric capacity is all connected with the negative pole of rechargeable battery with the second earth terminal;
3rd power end is connected with the positive pole of rechargeable battery;
This protection end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420689219.2U CN204248924U (en) | 2014-11-17 | 2014-11-17 | A kind of electric hair cutter control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420689219.2U CN204248924U (en) | 2014-11-17 | 2014-11-17 | A kind of electric hair cutter control circuit |
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| Publication Number | Publication Date |
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| CN204248924U true CN204248924U (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420689219.2U Active CN204248924U (en) | 2014-11-17 | 2014-11-17 | A kind of electric hair cutter control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112571460A (en) * | 2020-10-28 | 2021-03-30 | 深圳逗爱创新科技有限公司 | Pet or commercial shearing device |
-
2014
- 2014-11-17 CN CN201420689219.2U patent/CN204248924U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112571460A (en) * | 2020-10-28 | 2021-03-30 | 深圳逗爱创新科技有限公司 | Pet or commercial shearing device |
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