CN204761364U - Anti -shake moves electric screwdriver speed governing circuit - Google Patents
Anti -shake moves electric screwdriver speed governing circuit Download PDFInfo
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- CN204761364U CN204761364U CN201520574129.3U CN201520574129U CN204761364U CN 204761364 U CN204761364 U CN 204761364U CN 201520574129 U CN201520574129 U CN 201520574129U CN 204761364 U CN204761364 U CN 204761364U
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Abstract
The utility model relates to an anti -shake moves electric screwdriver speed governing circuit, including external circuit, still include oscillation circuit, reference level production return circuit, comparison circuit, feedback loop, protection return circuit, peak absorption circuit, the comparison circuit input is connected to the oscillation circuit output, comparison circuit's output connect protection circuit input end, external circuit is connected to the output of protection circuit, external circuit is connected to feedback loop's input, oscillation circuit's input is connected to feedback loop's output, feeds back oscillation circuit with external circuit's operating condition, external circuit is connected to the input of peak absorption circuit, the utility model discloses output is steady, can eliminate the response spike voltage of external circuit motor, and control motor rotation number is invariable, prevents the shake.
Description
Technical field
The utility model belongs to electric screwdriver field, is specifically related to a kind of stabilization electric screwdriver alignment circuit.
Background technology
Existing electric screwdriver, the induction peak voltage occurred when closing for preventing motor, at motor winding two ends reverse parallel connection diode, for induced voltage provides path of releasing, the effect eliminating peak voltage depends on the response speed of anti-parallel diodes, and when working in on-off mode speed governing, high-frequency switching spike impacts, all require higher to the through-current capability of diode and dissipation power.
Utility model content
In order to solve the problems referred to above that prior art exists, the utility model provides a kind of stabilization electric screwdriver alignment circuit.
The technical scheme that the utility model adopts is: a kind of stabilization electric screwdriver alignment circuit, comprise external circuit, also comprise oscillating circuit, reference level produces loop, comparison circuit, feedback loop, protective loop, peak absorbing loop, described output end of oscillating circuit connects comparison circuit input, the output of described comparison circuit connects protective circuit input, the output of described protective circuit connects external circuit, the input of described feedback loop connects external circuit, the output of described feedback loop connects the input of oscillating circuit, the operating state of external circuit is fed back to oscillating circuit, the input in described peak absorbing loop connects external circuit.
Further, also comprise LED illumination circuit, described LED illumination circuit output end connects the input of oscillating circuit, described LED illumination circuit comprises the first triode Q1, second switch SW2, LED illumination lamp, the base stage of described first triode Q1 is by the 17 resistance R17, 16 resistance R16 is connected with one end of second switch SW2 and passes through the 18 resistance R18 ground connection, the grounded emitter of described first triode Q1, the collector electrode of described first triode Q1 connects LED illumination lamp by the 19 resistance R19, the other end of described second switch SW2 connects power supply VCC, the 6th electric capacity C6 is in series with between 17 resistance R17 and the 18 resistance R18.
Further, described oscillating circuit comprises integrated circuit first component IC1, first resistance R1, 4th resistance R4, first electric capacity C1, second electric capacity C2, 1 pin of described integrated circuit first component IC1 connects feedback loop 14 and second resistance R2 one end by the 3rd resistance R3, the other end ground connection of described second resistance R2, 2 pin of described integrated circuit first component IC1 connect comparison circuit, 3 pin of described integrated circuit first component IC1 connect feedback loop and pass through the second resistance R2 ground connection, described first electric capacity C1 mono-termination power VCC, described first electric capacity C1 other end ground connection, one end of described second electric capacity C2 is connected with 2 pin of integrated circuit first component IC1, the other end ground connection of described second electric capacity C2, described first resistance R1 one end connects 1 pin of integrated circuit first component IC1, the other end of described first resistance R1 connects power supply VCC, 1 pin of the one termination integrated circuit first component IC1 of described 4th resistance R4, 2 pin of another termination integrated circuit first component IC1 of described 4th resistance R4.
Further, described reference level produces loop and comprises carbon slurry resistance VR, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, described carbon slurry resistance VR one end connects power supply VCC by the 6th resistance R6, the described carbon slurry resistance VR other end is by the 8th resistance R8 ground connection, and described carbon starches termination comparison circuit in the middle of resistance VR.
Further; described comparison circuit comprises integrated circuit second component IC2, the first interrupteur SW 1; 7 pin of described integrated circuit second component IC2 connect protective loop; 5 pin of described integrated circuit second component IC2 connect oscillating circuit 11 and are connected with first interrupteur SW 1 one end with by the 12 resistance R12; 6 pin of described integrated circuit second component IC2 connect reference level by the 5th resistance R5 and produce loop 12 and pass through the 4th electric capacity C4 ground connection, and described first interrupteur SW 1 other end connects power supply VCC.
Further, described feedback loop comprises the tenth resistance R10, the 11 resistance R11, the 3rd electric capacity C3, the 5th electric capacity C5, after described tenth resistance R10, the 11 resistance R11 connect, one end connects external circuit, the other end connects oscillating circuit and the 5th electric capacity C5 one end, described 5th electric capacity C5 other end ground connection, described 3rd electric capacity C3 one end connects the tenth resistance R10 one end and the 11 resistance R11 one end, described 3rd electric capacity C3 other end ground connection.
Further; described protective loop comprises voltage stabilizing didoe ZD1, pull down resistor R14, current-limiting resistance R20; the negative pole of described voltage stabilizing didoe ZD1 connects power supply VCC by pull-up resistor R13; the plus earth of described voltage stabilizing didoe ZD1; described pull down resistor R14 one end ground connection; the other end of described pull down resistor R14 connects the negative pole of current-limiting resistance R20 one end and voltage stabilizing didoe ZD1, and the other end of described current-limiting resistance R20 connects comparison circuit 13.
Further, peak absorbing loop comprises the 7th electric capacity C7, the 8th electric capacity C8, and described 7th electric capacity C7 one end connects power supply VCC, and the described 7th electric capacity C7 other end is connected with one end of the 8th electric capacity C8, and the other end of described 8th electric capacity C8 connects external circuit.
The beneficial effects of the utility model are: stable output power, can eliminate the induction peak voltage of external circuit motor, control motor speed constant, prevent shake; Be accompanied with field work illumination functions, and trip switch back lighting can not be extinguished at once, postpone just to extinguish after about 10 seconds, for operating personnel provides illumination convenient; With protection switch, when can prevent from not using, misoperation causes personal injury; There are two kinds of patterns, can directly full speed operation or continuous speed adjustment work from low speed to high speed, for eliminating peak voltage further, and reducing the heating loss of diode, adopting and adding capacitive absorption loop again at the two ends of diode, better effect can be obtained.
Accompanying drawing explanation
Fig. 1 is a kind of stabilization electric screwdriver alignment circuit theory diagram;
Fig. 2 is a kind of stabilization electric screwdriver alignment circuit figure.
In figure: 11, oscillating circuit; 12, reference level produces loop; 13, comparison circuit; 14, feedback loop; 1, external circuits; 2, LED illumination circuit; 3, protective circuit; 4, peak absorbing loop.
Embodiment
As shown in Figure 1, the utility model provides a kind of stabilization electric screwdriver alignment circuit, comprise external circuit 1, also comprise oscillating circuit 11, reference level produces loop 12, comparison circuit 13, feedback loop 14, protective loop 3, peak absorbing loop 4, oscillating circuit 11 output connects comparison circuit 13 input, the output of comparison circuit 13 connects protective circuit 3 input, the output of protective circuit 3 connects external circuit 1, the input of feedback loop 14 connects external circuit 1, the output of feedback loop 14 connects the input of oscillating circuit 11, the operating state of external circuit 1 is fed back to oscillating circuit 11, the input in peak absorbing loop 4 connects external circuit 1.
Also comprise LED illumination circuit 2, LED illumination circuit 2 output connects the input of oscillating circuit 11, LED illumination circuit 2 comprises the first triode Q1, second switch SW2, LED illumination lamp, the base stage of described first triode Q1 is by the 17 resistance R17, 16 resistance R16 is connected with one end of second switch SW2 and passes through the 18 resistance R18 ground connection, the grounded emitter of described first triode Q1, the collector electrode of described first triode Q1 connects LED illumination lamp by the 19 resistance R19, the other end of described second switch SW2 connects power supply VCC, the 6th electric capacity C6 is in series with between 17 resistance R17 and the 18 resistance R18, first electric capacity C1 of the 9th resistance R9 and oscillating circuit 11 part forms low energy filtering, thus filter out power noise, when second switch SW2 closes, electric current is tided over the 16 resistance R16 and is charged to the 6th electric capacity C6,17 resistance R17 and the 18 resistance R18 carries out to the 6th electric capacity C6 level the base stage that dividing potential drop is added to the first triode Q1, make the first triode Q1 conducting, then LED illumination lamp and the 19 resistance R19 have electric current to flow through, and LED illumination lamp luminescence can be thrown light on, after second switch SW2 opens, the electric charge that the 6th electric capacity C6 is filled with can keep the first triode Q1 to continue conducting about 10 seconds, and then the first triode Q1 closes, and LED illumination lamp is extinguished.
Oscillating circuit 11 comprises integrated circuit first component IC1, first resistance R1, 4th resistance R4, first electric capacity C1, second electric capacity C2, 1 pin of integrated circuit first component IC1 connects feedback loop 14 and second resistance R2 one end by the 3rd resistance R3, the other end ground connection of the second resistance R2, 2 pin of integrated circuit first component IC1 connect comparison circuit 13, 3 pin of integrated circuit first component IC1 connect feedback loop 14 and pass through the second resistance R2 ground connection, first electric capacity C1 mono-termination power VCC, first electric capacity C1 other end ground connection, one end of second electric capacity C2 is connected with 2 pin of the first integrated circuit (IC) 1, the other end ground connection of the second electric capacity C2, first resistance R1 one end connects 1 pin of integrated circuit first component IC1, the other end of the first resistance R1 connects power supply VCC, 1 pin of the one termination integrated circuit first component IC1 of the 4th resistance R4, 2 pin of another termination first integrated circuit (IC) 1 of the 4th resistance R4, form charging and discharging circuit by the 4th resistance R4 and the second electric capacity C2, the 3rd resistance R3 and the second resistance R2 ratio of components comparatively level loop, the first resistance R1 is used for current limliting, and the first electric capacity C1 is used for bypass supply noise.Second electric capacity C2 level and the second resistance R2 level are input to integrated circuit first component IC1 and compare, and the output level of control integration circuit first component IC1 overturns between high and low, causes the charge and discharge of the second electric capacity C2, thus produce vibration.
Reference level produces loop 12 and comprises carbon slurry resistance VR1, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, described carbon slurry resistance VR1 one end connects power supply VCC by the 6th resistance R6, the described carbon slurry resistance VR1 other end is by the 8th resistance R8 ground connection, and carbon starches termination comparison circuit in the middle of resistance VR1; By the 6th resistance R6, the 7th resistance R7 and carbon slurry resistance VR1, R8 form, obtain different reference levels by the slip on carbon slurry resistance VR1 of sliding spring sheet.
Comparison circuit 13 comprises integrated circuit second component IC2, the first interrupteur SW 1,7 pin of integrated circuit second component IC2 connect protective loop 3,5 pin of integrated circuit second component IC2 connect oscillating circuit 11 and are connected with first interrupteur SW 1 one end with by the 12 resistance R12,6 pin of integrated circuit second component IC2 connect reference level by the 5th resistance R5 and produce loop 12 and pass through the 4th electric capacity C4 ground connection, and first interrupteur SW 1 other end connects power supply VCC; 12 resistance R12 and the first interrupteur SW 1 are for being switched to full speed operation pattern, and the 5th resistance R5 and the 4th electric capacity C4 forms low-pass filter circuit, can carry out filtering to the high-frequency noise of input; The reference level input ic second component IC2 that the vibration output level of oscillating circuit 11 part and reference level produce loop 12 part compares, and control integration circuit second component IC2 exports square wave.
Feedback loop 14 comprises the tenth resistance R10, the 11 resistance R11, the 3rd electric capacity C3, the 5th electric capacity C5, after described tenth resistance R10, the 11 resistance R11 connect, one end connects external circuit, the other end connects oscillating circuit 11 and the 5th electric capacity C5 one end, described 5th electric capacity C5 other end ground connection, described 3rd electric capacity C3 one end connects the tenth resistance R10 one end and the 11 resistance R11 one end, described 3rd electric capacity C3 other end ground connection; Feedback loop feeds back to oscillating circuit 11 part the operating state of external circuit 1, so that stable oscillation stationary vibration, eliminates temperature drift.
Protective loop 3 comprises voltage stabilizing didoe ZD1, pull down resistor R14, current-limiting resistance R20, the negative pole of described voltage stabilizing didoe ZD1 connects power supply VCC by pull-up resistor R13, the plus earth of described voltage stabilizing didoe ZD1, pull down resistor R14 one end ground connection, the other end of described pull down resistor R14 connects the negative pole of current-limiting resistance R20 one end and voltage stabilizing didoe ZD1, and the other end of described current-limiting resistance R20 connects comparison circuit 13; Pull-up resistor R13 makes integrated circuit second component IC2 can export high level, pull down resistor R14, during integrated circuit second component IC2 output low level, for the Accumulating charge of metal-oxide-semiconductor field effect transistor Q2 grid provides path of releasing.Current-limiting resistance R20 slows down metal-oxide-semiconductor field effect transistor Q2 conducting speed, and avoid metal-oxide-semiconductor field effect transistor Q2 conducting to puncture instantaneously, ZD1 is voltage stabilizing didoe, the grid overvoltage of restriction metal-oxide-semiconductor field effect transistor Q2.
Peak absorbing loop 4 comprises the 7th electric capacity C7, the 8th electric capacity C8, and described 7th electric capacity C7 one end connects power supply VCC, and the described 7th electric capacity C7 other end is connected with one end of the 8th electric capacity C8, and the other end of the 8th electric capacity C8 connects external circuit 1; External motor MG1 is inductive load, when metal-oxide-semiconductor field effect transistor Q2 closes, motor MG1 internal inductance can produce induced electromotive force (may be 2 times of supply voltage) very high instantaneously, metal-oxide-semiconductor field effect transistor Q2 is produced and impacts, and induced electromotive force can not discharge, ringing can occur at metal-oxide-semiconductor field effect transistor Q2 switching moments, the fluctuation of service of motor MG1 can be shaken.After increasing the 7th electric capacity C7, the 8th electric capacity C8, the induced electromotive force of motor MG1 is absorbed, to next metal-oxide-semiconductor field effect transistor Q2 again conducting time, the 7th electric capacity C7, the 8th electric capacity C8 absorb energy discharged by metal-oxide-semiconductor field effect transistor Q2 again.
External circuits 1 comprises metal-oxide-semiconductor field effect transistor Q2, motor MG1, the first diode D1; the grid of metal-oxide-semiconductor field effect transistor Q2 connects protective loop 3; the source ground of metal-oxide-semiconductor field effect transistor Q2; the drain electrode of metal-oxide-semiconductor field effect transistor Q2 is connected with the positive pole of motor MG1 and the first diode D1, and the negative pole of the first diode D1 connects power supply VCC.
After energising, oscillating circuit 11 part is vibrated, produce the switching pulse controlled required for motor speed adjusting, control the switching frequency of motor, reference level produces loop 12 and produces linearly adjustable reference voltage according to switch over travel, make switching pulse controlled, the reference voltage that oscillating output voltage and reference level produce loop 12 part is input to comparison circuit 13 part simultaneously to carry out level and compares, produce the duty ratio adjustable signal controlling output power of motor, export square wave, as long as adjustment reference level produces the reference voltage of loop 12 part, the duty cycle square wave that then comparison circuit 13 part compares output will change, the square wave of the variable duty ratio that comparison circuit 13 part exports is through protective circuit 3 part pull-up pull-down circuit rear drive external circuit 1, the operate condition of external circuit 1 gets back to oscillating circuit 11 part by feedback loop 14 partial feedback again, form closed-loop control, the deviation that whole line-internal produces because of variations in temperature is transmitted back to oscillating circuit 11 part in degenerative mode, deviation is eliminated in automatic adjustment, when speed-regulating switch moves to the travel position of setting, the SW2 of LED illumination circuit 2 part can close, and namely LED can light luminescence, even if after unclamping speed-regulating switch, LED still can continue to light and then extinguish for about 10 seconds, for field work or darkroom operation provide the facility of illumination.In the whole electric screwdriver course of work, the capacitive absorption loop of peak absorbing loop 4 part, all at the induction peak voltage of constant absorption motor, makes the power output of motor constant, prevents shake.
The utility model is not limited to above-mentioned preferred forms; anyone can draw other various forms of products under enlightenment of the present utility model; no matter but any change is done in its shape or structure; every have identical with the application or akin technical scheme, all drops within protection range of the present utility model.
Claims (8)
1. a stabilization electric screwdriver alignment circuit, comprise external circuit, it is characterized in that: also comprise oscillating circuit (11), reference level produces loop (12), comparison circuit (13), feedback loop (14), protective loop (3), peak absorbing loop (4), described oscillating circuit (11) output connects comparison circuit (13) input, the output of described comparison circuit (13) connects protective circuit (3) input, the output of described protective circuit (3) connects external circuit (1), the input of described feedback loop (14) connects external circuit (1), the output of described feedback loop (14) connects the input of oscillating circuit (11), the operating state of external circuit (1) is fed back to oscillating circuit (11), the input of described peak absorbing loop (4) connects external circuit (1).
2. a kind of stabilization electric screwdriver alignment circuit according to claim 1, it is characterized in that: also comprise LED illumination circuit (2), described LED illumination circuit (2) output connects the input of oscillating circuit (11), described LED illumination circuit (2) comprises the first triode (Q1), second switch (SW2), LED illumination lamp, the base stage of described first triode (Q1) is by the 17 resistance (R17), 16 resistance (R16) is connected with one end of second switch (SW2) and passes through the 18 resistance (R18) ground connection, the grounded emitter of described first triode (Q1), the collector electrode of described first triode (Q1) connects LED illumination lamp by the 19 resistance (R19), the other end of described second switch (SW2) connects power supply (VCC), the 6th electric capacity (C6) is in series with between 17 resistance (R17) and the 18 resistance (R18).
3. a kind of stabilization electric screwdriver alignment circuit according to claim 1 and 2, it is characterized in that: described oscillating circuit (11) comprises integrated circuit first component (IC1), first resistance (R1), 4th resistance (R4), first electric capacity (C1), second electric capacity (C2), 1 pin of described integrated circuit first component (IC1) connects feedback loop (14) and the second resistance (R2) one end by the 3rd resistance (R3), the other end ground connection of described second resistance (R2), 2 pin of described integrated circuit first component (IC1) connect comparison circuit (13), 3 pin of described integrated circuit first component (IC1) connect feedback loop (14) and pass through the second resistance (R2) ground connection, described first electric capacity (C1) termination power (VCC), described first electric capacity (C1) other end ground connection, one end of described second electric capacity (C2) is connected with 2 pin of integrated circuit first component (IC1), the other end ground connection of described second electric capacity (C2), described first resistance (R1) one end connects 1 pin of integrated circuit first component (IC1), the other end of described first resistance (R1) connects power supply (VCC), 1 pin of one termination integrated circuit first component (IC1) of described 4th resistance (R4), 2 pin of another termination integrated circuit first component (IC1) of described 4th resistance (R4).
4. a kind of stabilization electric screwdriver alignment circuit according to claim 1 and 2, it is characterized in that: described reference level produces loop (12) and comprises carbon slurry resistance (VR), the 6th resistance (R6), the 7th resistance (R7), the 8th resistance (R8), described carbon slurry resistance (VR) one end connects power supply (VCC) by the 6th resistance (R6), described carbon slurry resistance (VR) other end is by the 8th resistance (R8) ground connection, and described carbon starches termination comparison circuit (13) in the middle of resistance (VR).
5. a kind of stabilization electric screwdriver alignment circuit according to claim 1 and 2, it is characterized in that: described comparison circuit (13) comprises integrated circuit second component (IC2), first switch (SW1), 7 pin of described integrated circuit second component (IC2) connect protective loop (3), 5 pin of described integrated circuit second component (IC2) connect oscillating circuit (11) and are connected with the first switch (SW1) one end with by the 12 resistance (R12), 6 pin of described integrated circuit second component (IC2) connect reference level by the 5th resistance (R5) and produce loop (12) and pass through the 4th electric capacity (C4) ground connection, described first switch (SW1) other end connects power supply (VCC).
6. a kind of stabilization electric screwdriver alignment circuit according to claim 1 and 2, it is characterized in that: described feedback loop (14) comprises the tenth resistance (R10), 11 resistance (R11), 3rd electric capacity (C3), 5th electric capacity (C5), described tenth resistance (R10), after 11 resistance (R11) series connection, one end connects external circuit (1), the other end connects oscillating circuit (11) and the 5th electric capacity (C5) one end, described 5th electric capacity (C5) other end ground connection, described 3rd electric capacity (C3) one end connects the tenth resistance (R10) one end and the 11 resistance (R11) one end, described 3rd electric capacity (C3) other end ground connection.
7. a kind of stabilization electric screwdriver alignment circuit according to claim 1 and 2, it is characterized in that: described protective loop (3) comprises voltage stabilizing didoe (ZD1), pull-up resistor (R14), current-limiting resistance (R20), the negative pole of described voltage stabilizing didoe (ZD1) connects power supply (VCC) by pull down resistor (R13), the plus earth of described voltage stabilizing didoe (ZD1), described pull-up resistor (R14) one end ground connection, the other end of described pull-up resistor (R14) connects the negative pole of current-limiting resistance (R20) one end and voltage stabilizing didoe (ZD1), the other end of described current-limiting resistance (R20) connects comparison circuit (13).
8. a kind of stabilization electric screwdriver alignment circuit according to claim 1 and 2, it is characterized in that: peak absorbing loop (4) comprise the 7th electric capacity (C7), the 8th electric capacity (C8), described 7th electric capacity (C7) one end connects power supply (VCC), described 7th electric capacity (C7) other end is connected with one end of the 8th electric capacity (C8), and the other end of described 8th electric capacity (C8) connects external circuit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520574129.3U CN204761364U (en) | 2015-08-03 | 2015-08-03 | Anti -shake moves electric screwdriver speed governing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520574129.3U CN204761364U (en) | 2015-08-03 | 2015-08-03 | Anti -shake moves electric screwdriver speed governing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204761364U true CN204761364U (en) | 2015-11-11 |
Family
ID=54476032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520574129.3U Expired - Fee Related CN204761364U (en) | 2015-08-03 | 2015-08-03 | Anti -shake moves electric screwdriver speed governing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204761364U (en) |
-
2015
- 2015-08-03 CN CN201520574129.3U patent/CN204761364U/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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20210803 |