CN106669950B - A kind of control circuit for kneading machine - Google Patents
A kind of control circuit for kneading machine Download PDFInfo
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- CN106669950B CN106669950B CN201610986783.4A CN201610986783A CN106669950B CN 106669950 B CN106669950 B CN 106669950B CN 201610986783 A CN201610986783 A CN 201610986783A CN 106669950 B CN106669950 B CN 106669950B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/04—Safety devices
Abstract
The invention discloses a kind of control circuit for kneading machine, including enter paper detection circuit, shredded paper delay control circuit, booting delay control circuit, feedback control circuit, trigger control circuit, switching circuit, power circuit and motor；Enter paper detection circuit for according to detecting whether that paper is put into the shredded paper mouth of shredder；Shredded paper delay control circuit and booting delay control circuit；Feedback control circuit is for providing positive and negative booting delay control circuit of feeding；Trigger control circuit, the break-make for controlling switching circuit；Switching circuit is for controlling motor operation or stopping；Power circuit is used to power for shredder aforementioned circuit；Motor is for driving shredder.The present invention is provided with shredded paper delay control circuit and booting delay control circuit; after paper tail leaves paper inlet; shredder can also work a period of time; or after paper causes paper jam to shut down too much; paper tail is not cut; it is rerunned after shredder can be allowed to stop, thus can thoroughly going to sticks and staves paper.
Description
Technical field
The present invention relates to a kind of control circuit for kneading machine.
Background technology
Shredder is the machine that paper is destroyed for shredding, generally by the blade of one group of rotation, paper comb and drive motor group
At paper is sent among the blade being mutually twisted, and is divided into many tiny scraps of paper, to achieve the purpose that secrecy.With
The application of the enhancing of confidential notions, shredder is more and more common, also develops the shredder of various functions.It is intelligent (to write
Enter program) shredder it is powerful, it is stable, but expensive.Non intelligent type (pure circuit, be not written into program)
Shredder reasonable price, but function can be limited, for example, paper inlet can't detect paper after will be stopped, cause paper tail broken
It is unclean etc., all constrain the universal of the shredder of low price.
Invention content
The object of the present invention is to provide it is a kind of can by paper thoroughly broken clean control circuit for kneading machine.
Realize the object of the invention technical solution be a kind of control circuit for kneading machine, including enter paper detection circuit, shredded paper prolongs
When control circuit, booting delay control circuit, feedback control circuit, trigger control circuit, switching circuit, power circuit and electricity
Machine；
It is described enter paper detection circuit, for according to detecting whether that paper is put into the shredded paper mouth of shredder, to control whether
Starting switch circuit；
The shredded paper delay control circuit and booting delay control circuit, for by changing resistance and capacitance
To control shutdown work delay time and booting work delay time；
The feedback control circuit, for providing positive and negative booting delay control circuit of feeding so that shredder is opened or the stopping time
The reference voltage of circuit is increased or is dragged down；
The trigger control circuit, the break-make for controlling switching circuit；
The switching circuit, for controlling motor operation or stopping；
The power circuit, for powering for shredder aforementioned circuit；
The motor, for driving shredder.
The shredded paper delay control circuit include resistance R6, resistance R17, resistance R18, capacitance C10, amplifier LM358 one
A amplifier IC1A and diode D2；The booting delay control circuit include resistance R3, resistance R4, resistance R5, capacitance C9 and
Another amplifier IC1B of amplifier LM358.
1 foot of the IC1A connects the cathode of diode D2, and 3 feet connect the concatenated intermediate point of resistance R6, R17, and 2 feet connect resistance
One end of R18 and capacitance C10 parallel connections, 4 feet ground connection, 8 feet meet VCC；The 5 concatenated intermediate points of foot connecting resistance R3, R4 of the IC1B,
6 feet connect the concatenated intermediate point of R5, C9；The anode of the diode D2 connects 6 feet, and cathode connects 1 foot.7 feet connect feedback control
Circuit (4) and trigger control circuit (5)；Another termination VCC of the resistance R3, resistance R5 and resistance R6；The resistance R4, electricity
Hinder the other end ground connection of R17, resistance R18, capacitance C9 and capacitance C10.
The feedback control circuit is the resistance R2 being connected between 5 feet of IC1B and 7 feet.
The switching circuit includes bidirectional triode thyristor Q1 and mechanical switch SW1, and 5 feet of mechanical switch SW1 connect two-way controllable
The poles T1 of silicon Q1,1 foot connect the poles T2 of bidirectional triode thyristor Q1；The poles G of bidirectional triode thyristor Q1 connect trigger control circuit, power circuit.
The trigger control circuit includes resistance R15, resistance R16 and triode Q2, and a termination of resistance R15 is two-way controllable
The poles G of silicon Q1, the collector of another termination triode Q2, the emitter ground connection of triode Q2, resistance R16 are connected to triode Q2
Base stage and 7 feet of IC1B between.
The motor is series excited machine, is arranged between 1 foot, 2 feet and 4 feet of mechanical switch SW1, and connects power supply electricity
Road.
The power circuit includes power interface J1, power interface J2, fuse F1, varistor VR1, varistor
VR2, inductance L3, capacitance C5, capacitance C7, capacitance C8, resistance R1, resistance R19, diode D4, diode D5 and zener diode
Z1；The fuse F1 is connected in power interface line J1 lines, and varistor VR1 mono- terminates power interface J2, and another termination is protected
Dangerous silk F1；After capacitance C5 and resistance R19 parallel connections and inductance L3 series windings are connected on the cathode of power interface J2 and diode D5；Diode
The cathode of D4 is connected in 5 feet of mechanical switch SW1, and anode is connected between resistance R19 and the cathode of diode D5；Varistor VR2
Both ends be separately connected T1, T2 of silicon-controlled Q1；The cathode of capacitance C7 is grounded, and anode is connect with the poles T1 of bidirectional triode thyristor Q1,
And VCC is connect by resistance R1；The cathode of zener diode Z1 connects VCC, plus earth；The anode of capacitance C8 meets VCC, and cathode connects
Ground.
Control circuit for kneading machine further includes indicating circuit；The indicating circuit includes concatenated resistance R21 and light-emitting diodes
Pipe D8 and concatenated resistance R22 light emitting diodes D7；The switching circuit further includes safety switch, the safety switch peace
Loaded on shredded paper gate, one end connects power circuit, and 6 feet of a contact portion mechanical switch SW1 of the other end, another is touched
One end of point connection resistance R21；The anode of the other end connection light emitting diode D8 of resistance R21, the cathode of light emitting diode D8
Ground connection；A termination VCC of resistance R22, the other end connect the anode of light emitting diode D7, the minus earth of light emitting diode D7.
It is described enter paper detection circuit include resistance R7, resistance R9, infrared transmitting tube HF1, infrared receiving tube HR1 and diode
D1；The infrared transmitting tube HF1 and infrared receiving tube HR1 is oppositely arranged on the both sides of paper inlet of paper shredder；Resistance R7 and infrared
Reception pipe HR1 series connections are between VCC and ground, and resistance R9 and infrared transmitting tube HF1 series connections are between VCC and ground；Diode
The cathode of D1 connects shredded paper delay control circuit, and anode is connected between resistance R7 and infrared receiving tube HR1.
After using above-mentioned technical proposal, the present invention has the effect of below positive：(1) present invention is provided with shredded paper and prolongs
When control circuit and booting delay control circuit, after paper tail leaves paper inlet, shredder can also work a period of time, or
After paper causes paper jam to shut down too much, paper tail is not cut, and is rerunned after shredder can be allowed to stop, thus can be thorough
Ground goes to sticks and staves paper.
(2) after shredded paper delay time of the invention adjusts booting delay by a pair of of resistance and capacitance, then
Shredded paper delay time is adjusted by adjusting another pair resistance and capacitance, it is very convenient.
(3) because actual use in, be in power supply containing ripple, so reference voltage be also to have ripple, in this way
Cause shredder to occur a unstable shake when shutting down, influences user experience.Invention introduces positive feedbacks, are turning off
When due to positive feedback effect, reference voltage is lower immediately so that output Trig control signal reliably become low electricity
It is flat, bidirectional triode thyristor is closed, is not shaken when shredder being made to be stopped.
(4) present invention is mounted with that safety switch, one end connect power circuit on shredded paper gate, and other end connection machinery is opened
It closes；When the door is open, safety open disconnects, and the main circuit of machine is cut off, and so that machine is stopped, can be reached the mesh of safeguard protection
's.
(5) the ingenious connection of bidirectional triode thyristor and mechanical switch of the invention so that mechanical switch can play the role of changing, can be with
Change the traffic direction of motor, forward or reverse, and when mechanical switch is in forward position, bidirectional triode thyristor controls the fortune of motor
Row and stopping, when bidirectional triode thyristor is connected, motor operation, when bidirectional triode thyristor turns off, motor stops；When machinery is in reversion position
When setting, alternating current is directly connected to motor by mechanical switch, makes motor reversal.
(6) ingehious design switching circuit and power circuit of the present invention so that trigger current is the G from bidirectional triode thyristor always
Outflow, that is, used two, three quadrant characteristics of bidirectional triode thyristor, effectively avoided fourth quadrant.Because of capacitance-resistance mode power supply mould
In formula, due to the limitation of the element power of zener diode, the electric current of relatively high power cannot be provided, circuit of the invention to control
System becomes simple, the stabilization that properties of product become.Also because trigger current need it is small so that power can be done smaller,
Effectively cost is saved.
(7) since the time that machine powers on is random, it is possible to be powered in the zero crossing of sine wave, it is also possible in sine
The peak point of wave is powered, if powered in peak point, the crest voltage of 311V will be all added on the current limliting original paper of power circuit,
It is typically chosen resistance, but to the dash current protection diode of limitation energization moment, the resistance value of resistance cannot be too small, but resistance
Value is bigger, and the fever in normal work will be more serious, and waste energy.Therefore the present invention uses inductance conduct instead and powers on
The current limiting element of moment effectively limits the dash current for powering on peak value, protects diode, and inductance itself does not consume energy,
It does not generate heat when normal work, the energy that inductance is stored can feed back to power grid in next cycle.
Description of the drawings
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail, wherein
Fig. 1 is the principle of the present invention block diagram.
Fig. 2 is the circuit diagram of the present invention.
When Fig. 3 is feedback-less control circuit, when shredder turns off, the benchmark electricity of 5 feet of voltage and LM358 on capacitance C9
Pressure figure.
When Fig. 4 is feedback-less control circuit, when shredder turns off, the output voltage figure of 7 feet of LM358.
Fig. 5 is when having feedback control circuit, and when shredder turns off, the benchmark of 5 feet of voltage and LM358 on capacitance C9 is electric
Pressure figure.
Fig. 6 is when having feedback control circuit, when shredder turns off, the output voltage figure of 7 feet of LM358.
Fig. 7 be circuit after the power is turned on, voltage oscillogram.
Fig. 8 be circuit after the power is turned on, voltage oscillogram, t0 is to be powered in peak point in figure.
Attached figure label is：
Enter paper detection circuit 1, shredded paper delay control circuit 2, booting delay control circuit 3, feedback control circuit 4, triggering
Control circuit 5, switching circuit 6, motor 7, power circuit 8, indicating circuit 9.
Specific implementation mode
(embodiment 1)
See Fig. 1, a kind of control circuit for kneading machine of the present embodiment, including enters paper detection circuit 1, shredded paper delay control circuit
2, be switched on delay control circuit 3, feedback control circuit 4, trigger control circuit 5, switching circuit 6, motor 7, power circuit 8 and refer to
Show circuit 9；Enter paper detection circuit 1, detects whether that paper is put into the shredded paper mouth of shredder for basis, to control whether to start
Switching circuit 6；Shredded paper delay control circuit 2 and booting delay control circuit 3, for by changing resistance and capacitance
To control shutdown work delay time and booting work delay time；Feedback control circuit 4 prolongs for providing positive and negative booting of feeding
When control circuit 3 so that shredder open or the reference voltage of stopping time circuit increase or drag down；Trigger control circuit 5, for controlling
The break-make of switching circuit 6 processed；Switching circuit 6, for controlling the operation of motor 7 or stopping；Power circuit 8, for for before shredder
State circuit power supply；Motor 7, for driving shredder；Indicating circuit 9 is used to indicate shredder on/off situation and work feelings
Condition.
See Fig. 2, a kind of specific circuit diagram given in figure, enter paper detection circuit 1 include resistance R7, it is resistance R9, infrared
Transmitting tube HF1, infrared receiving tube HR1 and diode D1；Infrared transmitting tube HF1 and infrared receiving tube HR1 are oppositely arranged on shredded paper
The both sides of machine paper inlet；Resistance R7 and infrared receiving tube HR1 series connections are between VCC and ground, resistance R9 and infrared transmitting tube HF1
Series connection is between VCC and ground；The cathode of diode D1 connects shredded paper delay control circuit 2, and anode is connected on resistance R7 and is connect with infrared
Between closed tube HR1.Infrared receiving tube HR1 receives the infrared light conducting of infrared transmitting tube HF1 transmittings, diode D1 when not having paper
Anode voltage very little, when there is paper, infrared receiving tube HR1 does not receive infrared light and is in cut-off state, diode D1 anodes
Voltage is pulled up by resistance R7, becomes high level.
Shredded paper delay control circuit 2 include resistance R6, resistance R17, resistance R18, capacitance C10, one of amplifier LM358 put
Big device IC1A and diode D2；The delay control circuit 3 that is switched on includes resistance R3, resistance R4, resistance R5, capacitance C9 and amplifier
Another amplifier IC1B of LM358.1 foot of IC1A connects the cathode of diode D2, and 3 feet connect the concatenated centre resistance R6, R17
Point, 2 feet connect one end of resistance R18 and capacitance C10 parallel connections, 4 feet ground connection, and 8 feet meet VCC；The 5 foot connecting resistance R3 of the IC1B,
The concatenated intermediate points of R4,6 feet connect the concatenated intermediate point of R5, C9, and the anode of diode D2 connects 6 feet, and cathode connects 1 foot.7 feet connect
Connect feedback control circuit (4) and trigger control circuit (5)；Another termination VCC of the resistance R3, resistance R5 and resistance R6；Institute
State the other end ground connection of resistance R4, resistance R17, resistance R18, capacitance C9 and capacitance C10.The signal of resistance R3, resistance R4 partial pressures
The 5 foot electrode input ends that reference voltage is connected to amplifier LM358 are formed with the feedback signal formed by resistance R2, shredder is powered
Since the electricity on capacitance C9 is 0 voltage it is 0 when beginning, so the voltage for being connected to 6 foot of amplifier LM358 negative inputs is also
0V makes 7 feet of amplifier LM358 export high level in this way, to drive trigger control circuit 5 to go control bidirectional triode thyristor Q1 open-minded
Shredder is set to work, because that the voltage at the both ends capacitance C9 can be with the charging of resistance R5 is higher and higher, when the voltage is more than amplifier
When reference voltage on 5 feet of LM358,7 feet of amplifier LM358 export low level, to drive trigger control circuit 5 to go to turn off
Bidirectional triode thyristor Q1, makes shredder be stopped.The paper that booting delay control circuit is used to be put into for user is excessive, causes
Shredder paper jam, but paper has been moved off into paper detection circuit, and the case where some paper tail is not cut, occur this
Situation pushes out again as long as mechanical switch SW1 is pushed stopping, and motor 8 rotates forward, and cuts away last paper, and booting work is prolonged
When time span can very easily be realized by the resistance value and capacitance C9 capacity that change resistance R5.Resistance R6, resistance R17
The 3 foot electrode input ends that one shredded paper delay reference voltage is connected to amplifier LM358, the diode when there is paper are provided after partial pressure
The anode voltage of D1 is high level, to the capacitance C10 chargings of the 2 foot negative inputs to being connected to amplifier LM358, works as voltage
When the reference voltage of 3 feet more than amplifier LM358,1 foot of amplifier LM358 exports low level, and by diode D2 to capacitance
C9 discharges so that the 6 foot voltages of amplifier LM358 are less than 5 feet of amplifier LM358, and 7 feet of amplifier LM358 export high level, pass through
Trigger control circuit 5, which controls bidirectional triode thyristor Q1 conducting, makes shredder work, paper it is broken it is complete after, the anode of diode D1 becomes again
Low level, at this time capacitance C10 discharge further through resistance R18, electric discharge makes voltage drop capacitance C10 on to 3 feet for being less than amplifier LM358
When voltage, 1 foot of amplifier LM358 exports high level, and resistance R5 again starts to charge up capacitance C9, when voltage is more than fortune on capacitance C9
When putting the voltage of 5 feet of LM358,7 feet of amplifier LM358 export low level, and bidirectional triode thyristor is turned off by trigger control circuit 5
Q1 makes shredder be stopped.Shredded paper delay time include resistance R18 to the discharge time of capacitance C10 and resistance R5 to capacitance
The charging time of C9, after adjusting booting delay by resistance R5 and capacitance C9, then by adjusting the resistance value and electricity of resistance R18
Hold the capacity of C10 to adjust shredded paper delay time.
Feedback control circuit 4 is the resistance R2 being connected between 5 feet of IC1B and 7 feet.Resistance R2 is by the 7 of amplifier LM358
Foot output signal feeds back to resistance R3, resistance R4 voltage division signals, forms reference voltage, when 7 feet of amplifier LM358 export high level
When, reference voltage is formed after making voltage division signal increase due to the feedback of resistance R2, when 7 feet of amplifier LM358 export low level
When, form reference voltage after due to the feedback of resistance R2 voltage division signal being declined.It is broken due to the positive feedback provided with resistance R2
Capacitance C9 voltages rise to the 5 foot voltages of amplifier LM358 to paper machine when off so that 7 feet of LM358 become low electricity from high level
Usually, due to the effect of positive feedback, being connected to the reference voltage of 5 feet of amplifier LM358 can be lower, it is ensured that the 6 foot voltages of LM358
The continual and steady 5 foot voltages more than LM358 of energy so that it is electric to pass through triggering control for the output low level that 7 feet of LM358 are stablized
Road 5, the Q1 shutdowns of control bidirectional triode thyristor, shredder are stopped.Similarly, due to the positive feedback of resistance R2, shredder is open-minded
When capacitance C9 voltages drop to the 5 foot voltages of amplifier LM358 so that when 7 feet of LM358 have low level to become high level, due to
The effect of positive feedback, being connected to the 5 foot reference voltages of amplifier LM358 can get higher, it is ensured that the 6 foot voltages of LM358 can be continual and steady
The 5 foot voltages less than LM358 so that the output high level that 7 feet of LM358 are stablized passes through trigger control circuit 5, and control is double
Open-minded to silicon-controlled Q1, machine is started to work.The reason of feedback control circuit 4 are arranged is：Because in actual use, in power supply
It is containing ripple, so the 5 foot reference voltages of amplifier LM358 are also to have ripple, such as the U (5P) in Fig. 3；Shutdown when
The voltage waited on capacitance C9 slowly rises, such as the U (6P) in Fig. 3.In the case where being not provided with feedback control circuit 4,
In turn off process, the output voltage of 7 feet of amplifier LM358 becomes narrow gradually rectangular wave by there are a string of positive pulses, such as U in Fig. 4
Shown in (7P), causes shredder to occur a unstable shake when shutting down in this way, influence user experience.And it introduces positive and negative
Feedback, due to the effect of positive feedback when shutdown, reference voltage is lower immediately, and (this amplitude dragged down can pass through change
The power of positive feedback is realized by changing the resistance value of resistance R2), such as the U (5P) in Fig. 5；Voltage on capacitance C9 is same
It is slowly to rise, such as the U (6P) in Fig. 5, but being lower due to reference voltage so that U (6P) stablized is more than U (5P), to
Make the U (7P) in output Trig control signal such as Fig. 6, reliably become low level, closes bidirectional triode thyristor Q1, shredder is made to stop
It is not shaken when only working.
Trigger control circuit 5 includes resistance R15, resistance R16 and triode Q2, a termination bidirectional triode thyristor of resistance R15
The poles G of Q1, the collector of another termination triode Q2, the emitter ground connection of triode Q2, resistance R16 are connected to triode Q2's
Between base stage and 7 feet of IC1B.Triode Q2 is driven by resistance R16 when 7 feet of amplifier LM358 export high level so that
Triode Q2 conductings, then so that the trigger current of bidirectional triode thyristor Q1 is flowed out by trigger electrode G, by resistance R15 and three poles
Pipe Q2 flows to ground, and when trigger electrode G has trigger current outflow, bidirectional triode thyristor Q1 is turned on, and is rotated to control motor 7, broken
Paper machine works, and the triggering mode of this sourcing current makes the break-make of bidirectional triode thyristor Q1 be easily controlled.
Switching circuit 6 includes bidirectional triode thyristor Q1 (model BT136), mechanical switch SW1 and safety switch, mechanical switch
5 feet of SW1 connect the poles T1 of bidirectional triode thyristor Q1, and 1 foot connects the poles T2 of bidirectional triode thyristor Q1；The poles the G contact hair of bidirectional triode thyristor Q1
Control circuit 5, power circuit 7.Safety switch is installed on shredded paper gate, and one end connects power circuit 8, and one of the other end touches
6 feet of point connection mechanical switch SW1, one end of another contact portion resistance R21；When the door is open, safety open disconnects, machine
Main circuit be cut off, so that machine is stopped, to achieve the purpose that safeguard protection.As shown in Fig. 2, bidirectional triode thyristor Q1 and machine
The ingenious connection of tool switch SW1 so that mechanical switch SW1 plays the role of changing, thus it is possible to vary the traffic direction of motor 7, rotate forward or
Reversion, and when mechanical switch SW1 is in forward position, the operation and stopping of bidirectional triode thyristor Q1 control motors 7, when two-way controllable
When silicon Q1 conductings, motor 7 is run, and when bidirectional triode thyristor Q1 is turned off, motor 7 stops；When mechanical SW1 is in backward position, exchange
Electricity is directly connected to motor 7 by mechanical switch SW1, and motor 7 is made to invert.
Power circuit 7 include power interface J1, power interface J2, fuse F1, varistor VR1, varistor VR2,
Inductance L3, capacitance C5, capacitance C7, capacitance C8, resistance R1, resistance R19, diode D4, diode D5 and zener diode Z1；Institute
It states fuse F1 to be connected in power interface line J1 lines, varistor VR1 mono- terminates power interface J2, another termination fuse
F1；After capacitance C5 and resistance R19 parallel connections and inductance L3 series windings are connected on the cathode of power interface J2 and diode D5；Diode D4's
Cathode is connected in 5 feet of mechanical switch SW1, and anode is connected between resistance R19 and the cathode of diode D5；The two of varistor VR2
End is separately connected T1, T2 of silicon-controlled Q1；The cathode of capacitance C7 is grounded, and anode is connect with the poles T1 of bidirectional triode thyristor Q1, and is led to
It crosses resistance R1 and meets VCC；The cathode of zener diode Z1 connects VCC, plus earth；The anode of capacitance C8 connects VCC, cathode ground connection.Electricity
After the power is turned on, the power supply due to being connected to the both ends J1, J2 is alternating current, and voltage waveform is as shown in fig. 7, the potential as J1 is higher than J2 on road
When, electric current after fuse F1, safety switch, capacitance C7, diode D5, capacitance C5 in parallel and resistance R19, inductance L3 by flowing
To J2, practical equivalent circuit is connected for capacitance C7, capacitance C5 and inductance L3, so the half cycle of each sine wave, it will about C5*
220V (due to inductance very little, the ratio of capacitance C7 and capacitance C5 are again very big, have ignored the partial pressure of inductance L3 and capacitance C7 here)
Electricity flow into capacitance C7, according to load, adjustment adjustment capacitance C5, you can to form a direct current on capacitance C7
Pressure, the DC voltage form DC power supply after being filtered again by resistance R1 current limlitings, zener diode Z1 voltage stabilizings, capacitance C8.When
When the ends J2 potential is higher than J1, electric current passes through inductance L3, capacitance C5 in parallel and resistance R19, diode D4, safety switch, insurance
Silk F1, J1 is eventually flowed into, so when the ends J2 potential is higher than J1, circuit is that the electricity stored by capacitance C7 and capacitance C8 comes
For loaded work piece.Since the time that machine powers on is random, it is possible to be powered in the zero crossing of sine wave, it is also possible in sine
The peak point of wave is powered, such as the t of Fig. 8OPoint.Zero crossing be powered it is out of question, but if being powered in peak point, due to capacitance C7,
Capacitance C5 and inductance L3 is series connection again, and the voltage at both ends when capacitance powers on cannot be mutated, i.e. capacitance C7 and capacitance C5 are being powered on
Moment is equivalent to short circuit, and the crest voltage of such 311V will be all added on inductance L3.Common design is to be used herein electricity
Resistance, and to the dash current protection diode D4 and diode D5 of limitation energization moment, the resistance value of resistance cannot be too small, but electricity
Resistance value is bigger, and the fever in normal work will be more serious, and waste energy.Therefore the present embodiment use inductance L3 as
The current limiting element of powered on moment rather than the common resistive element used, a characteristic of inductance, which is electric current, to be mutated, inductance
Impedance Z=j ω L=j*2* π * f*L, when curent change is faster, i.e., the f in formula is bigger, and impedance is bigger, even if on so
Capacitance C7 and C5 are equivalent to short circuit when electric, and inductance L3 does not allow electric current moment to become larger yet, and effectively limits the impact for powering on peak value
Electric current protects diode D4 and diode D5, and inductance L3 itself does not consume energy, and when normal work does not generate heat, and inductance is stored
Energy can feed back to power grid in next cycle.
As shown in Fig. 2, the ingehious design of switching circuit 6 and power circuit 8 so that DC power supply and bidirectional triode thyristor Q1 are total
A points, electric current is always flowed out from trigger electrode G points when triggering bidirectional triode thyristor Q1, according to the trigger characteristic of bidirectional triode thyristor Q1, is located at
Second and when third quadrant, trigger current maximum only needs 10mA, and when positioned at first and fourth quadrant, trigger current maximum needs
Want 25mA.First quartile：T2+, G+ refer to silicon-controlled principal current and flow to T1 by T2, and trigger current flows to T1 by G；Second quadrant：
T2+, G- refer to silicon-controlled principal current and flow to T1 by T2, and trigger current flows to G by T1 and flowed out from trigger electrode G；Third quadrant：
T2-, G- refer to silicon-controlled principal current and flow to T2 by T1, and trigger current flows to G by T1 and flowed out from trigger electrode G；Fourth quadrant：
T2-, G+ refer to silicon-controlled principal current and flow to T2 by T1, and trigger current flows to T1 by G.The present embodiment is fully according to bidirectional triode thyristor
The trigger characteristic of Q1, ingehious design switching circuit 6 and power circuit 8 so that trigger current is flowed out from the poles G always, that is, is used
Two, three quadrant characteristics of bidirectional triode thyristor Q1, effectively avoid fourth quadrant.Because in capacitance-resistance mode electric source modes, due to
The limitation of the element power of zener diode, cannot provide the electric current of relatively high power, and the circuit of the present embodiment makes control become
Simply, the stabilization that properties of product become.Also because trigger current need it is small so that power can be done smaller, effectively
Cost is saved.
Motor 7 is series excited machine, is arranged between 1 foot, 2 feet and 4 feet of mechanical switch SW1, and connect power circuit.Refer to
Show that circuit 9 includes concatenated resistance R21 and light emitting diode D8 and concatenated resistance R22 light emitting diodes D7；Resistance R21
One end connect safety switch SAFTY1, the other end connects the anode of light emitting diode D8, the minus earth of light emitting diode D8；
A termination VCC of resistance R22, the other end connect the anode of light emitting diode D7, the minus earth of light emitting diode D7.
Use is fully described below：It is first closed safety switch, after energization, DC voltage is formed at the VCC of Fig. 2,
When having paper, paper is placed between infrared receiving tube HR1 and infrared transmitting tube HF1, infrared receiving tube HR1 and diode
The points of D1 even become high voltage, and capacitance C10 chargings, the 2 foot voltages of amplifier LM358 is then given to be more than 3 foot voltages, 1 foot of LM358
Low level is exported, by diode D2 the voltage pull-down of capacitance C9 so that the 6 foot voltages of amplifier LM358 are lower than 5 feet, 7 outputs
High voltage drives triode Q2, resistance R15 by resistance R16, bidirectional triode thyristor Q1 is made to be connected, and shredder brings into operation.Work as handle
Paper is taken away between infrared receiving tube HR1 and infrared transmitting tube HF1, or stops being put into paper, and infrared receiving tube HR1 is received
Infrared light, resistance R7 and infrared receiving tube HR1, diode D1 tie points become low-voltage, are equivalent to diode D1 and do not work,
It is slowly discharged by resistance R18, the 2 foot voltages for being put into amplifier LM358 always are less than 3 foot voltages, at this moment 1 foot of amplifier LM358
Meeting output HIGH voltage, diode D2 reversely end, do not work, and resistance R5 charges to capacitance C9, and voltage is higher and higher, makes
When the 6 foot voltages of amplifier LM358 are obtained higher than 5 foot, 7 feet export low-voltage, triode Q2 are driven by resistance R16, double
It is turned off to silicon-controlled Q1, shredder stops.
Particular embodiments described above has carried out further in detail the purpose of the present invention, technical solution and advantageous effect
It describes in detail bright, it should be understood that the above is only a specific embodiment of the present invention, is not intended to restrict the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the present invention
Within the scope of shield.
Claims (10)
1. a kind of control circuit for kneading machine, it is characterised in that：Including enter paper detection circuit (1), shredded paper delay control circuit (2),
Be switched on delay control circuit (3), feedback control circuit (4), trigger control circuit (5), switching circuit (6), motor (7), power supply
Circuit (8) and indicating circuit (9)；
It is described enter paper detection circuit (1), for according to detecting whether that paper is put into the shredded paper mouth of shredder, to control whether to open
Dynamic switching circuit (6)；
The shredded paper delay control circuit (2) and booting delay control circuit (3), for being held by changing resistance and capacitance
It measures to control shutdown work delay time and booting work delay time；
The feedback control circuit (4), for providing positive and negative booting delay control circuit (3) of feeding so that shredder is opened or stopped
When circuit reference voltage increase or drag down；
The trigger control circuit (5), the break-make for controlling switching circuit (6)；
The switching circuit (6), for controlling motor (7) operation or stopping；
The motor (7), for driving shredder；
The power circuit (8), for powering for shredder aforementioned circuit.
2. a kind of control circuit for kneading machine according to claim 1, it is characterised in that：The shredded paper delay control circuit
(2) include resistance R6, resistance R17, resistance R18, capacitance C10, an amplifier IC1A of amplifier LM358 and diode D2；Institute
State another amplifier that booting delay control circuit (3) includes resistance R3, resistance R4, resistance R5, capacitance C9 and amplifier LM358
IC1B。
3. a kind of control circuit for kneading machine according to claim 2, it is characterised in that：1 foot of the IC1A connects diode
The cathode of D2,3 feet connect the concatenated intermediate point of resistance R6, R17, and 2 feet connect one end of resistance R18 and capacitance C10 parallel connections, and 4 feet connect
Ground, 8 feet meet VCC；The anode of the diode D2 connects 6 feet, and cathode connects 1 foot；7 feet connect feedback control circuit (4) and touch
Send out control circuit (5)；Another termination VCC of the resistance R3, resistance R5 and resistance R6；The resistance R4, resistance R17, resistance
The other end of R18, capacitance C9 and capacitance C10 are grounded.
4. a kind of control circuit for kneading machine according to claim 3, it is characterised in that：The feedback control circuit (4) is
The resistance R2 being connected between 5 feet of IC1B and 7 feet.
5. a kind of control circuit for kneading machine according to claim 4, it is characterised in that：The switching circuit (6) includes double
To silicon-controlled Q1 and mechanical switch SW1,5 feet of mechanical switch SW1 connect the poles T1 of bidirectional triode thyristor Q1, and 1 foot connects bidirectional triode thyristor
The poles T2 of Q1；The poles G of bidirectional triode thyristor Q1 connect trigger control circuit (5), power circuit (8).
6. a kind of control circuit for kneading machine according to claim 5, it is characterised in that：Trigger control circuit (5) packet
Include resistance R15, resistance R16 and triode Q2, the poles G of a termination bidirectional triode thyristor Q1 of resistance R15, another termination triode Q2
Collector, the emitter ground connection of triode Q2, resistance R16 is connected between the base stage of triode Q2 and 7 feet of IC1B.
7. a kind of control circuit for kneading machine according to claim 6, it is characterised in that：The motor (7) is series excited machine,
It is arranged between 1 foot, 2 feet and 4 feet of mechanical switch SW1, and connects power circuit.
8. a kind of control circuit for kneading machine according to claim 7, it is characterised in that：The power circuit (8) includes electricity
Source interface J1, power interface J2, fuse F1, varistor VR1, varistor VR2, inductance L3, capacitance C5, capacitance C7, electricity
Hold C8, resistance R1, resistance R19, diode D4, diode D5 and zener diode Z1；The fuse F1 is connected on power supply and connects
In mouth J1 circuits, varistor VR1 mono- terminates power interface J2, another termination fuse F1；After capacitance C5 and resistance R19 parallel connections
The cathode of power interface J2 and diode D5 are connected on inductance L3 series windings；The cathode of diode D4 is connected in the 5 of mechanical switch SW1
Foot, anode are connected between resistance R19 and the cathode of diode D5；The both ends of varistor VR2 be separately connected silicon-controlled Q1 T1,
T2；The cathode of capacitance C7 is grounded, and anode is connect with the poles T1 of bidirectional triode thyristor Q1, and meets VCC by resistance R1；Zener diode
The cathode of Z1 connects VCC, plus earth；The anode of capacitance C8 connects VCC, cathode ground connection.
9. a kind of control circuit for kneading machine according to claim 8, it is characterised in that：Further include indicating circuit (9)；It is described
Indicating circuit (9) includes concatenated resistance R21 and light emitting diode D8 and concatenated resistance R22 light emitting diodes D7；It is described
Switching circuit further includes safety switch, and the safety switch is installed on shredded paper gate, and one end connects power circuit (8), another
6 feet of one contact portion mechanical switch SW1 at end, one end of another contact portion resistance R21；The other end of resistance R21
Connect the anode of light emitting diode D8, the minus earth of light emitting diode D8；A termination VCC of resistance R22, other end connection hair
The anode of optical diode D7, the minus earth of light emitting diode D7.
10. a kind of control circuit for kneading machine according to claim 9, it is characterised in that：It is described enter paper detection circuit (1) packet
Include resistance R7, resistance R9, infrared transmitting tube HF1, infrared receiving tube HR1 and diode D1；The infrared transmitting tube HF1 and infrared
Reception pipe HR1 is oppositely arranged on the both sides of paper inlet of paper shredder；Resistance R7 and infrared receiving tube HR1 series connections are in VCC and ground
Between, resistance R9 and infrared transmitting tube HF1 series connections are between VCC and ground；The cathode of diode D1 connects shredded paper delay control circuit
(2), anode is connected between resistance R7 and infrared receiving tube HR1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610986783.4A CN106669950B (en) | 2016-11-09 | 2016-11-09 | A kind of control circuit for kneading machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610986783.4A CN106669950B (en) | 2016-11-09 | 2016-11-09 | A kind of control circuit for kneading machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106669950A CN106669950A (en) | 2017-05-17 |
| CN106669950B true CN106669950B (en) | 2018-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610986783.4A Active CN106669950B (en) | 2016-11-09 | 2016-11-09 | A kind of control circuit for kneading machine |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19757766A1 (en) * | 1997-12-23 | 1999-06-24 | Hermann Schwelling | Device for delayed drive shutdown of document shredders |
| US20020100827A1 (en) * | 2001-01-30 | 2002-08-01 | Ming-Hui Ho | Paper shredder |
| CN2702778Y (en) * | 2003-08-16 | 2005-06-01 | 郑鹏程 | Controller for automatic breaking paper machine |
| CN2825104Y (en) * | 2005-10-10 | 2006-10-11 | 罗贤俐 | Delay unit of paper shredder |
| CN100389883C (en) * | 2006-01-17 | 2008-05-28 | 钟奋强 | Intelligent gearshift paper shredder and its automatic gearshifting method |
| CN201135908Y (en) * | 2007-11-20 | 2008-10-22 | 广州市阳光科密电子科技有限公司 | Intellectualized safe paper crusher |
| CN102716795B (en) * | 2011-02-14 | 2014-05-07 | 上海震旦办公设备有限公司 | Shredder control system based on permittivity |
| CN102847602A (en) * | 2011-06-27 | 2013-01-02 | 上海震旦办公设备有限公司 | Paper shredder control system responsive to touch-sensitive element |
| CN104117423B (en) * | 2013-04-24 | 2016-03-02 | 上海震旦办公设备有限公司 | Energy-saving paper shredder operating circuit |
| CN104457795B (en) * | 2013-09-17 | 2017-02-01 | 上海震旦办公设备有限公司 | Paper jamming judgment method for paper shredder |
| CN206184590U (en) * | 2016-11-09 | 2017-05-24 | 常州市浦西尔电子有限公司 | Control circuit for kneading machine |
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2016
- 2016-11-09 CN CN201610986783.4A patent/CN106669950B/en active Active
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