CN103263969A - Shredder - Google Patents
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- CN103263969A CN103263969A CN2013101912912A CN201310191291A CN103263969A CN 103263969 A CN103263969 A CN 103263969A CN 2013101912912 A CN2013101912912 A CN 2013101912912A CN 201310191291 A CN201310191291 A CN 201310191291A CN 103263969 A CN103263969 A CN 103263969A
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Abstract
The invention provides a shredder, relates to the field of crushers, and aims to solve the problems that for the existing shredder, paper jamming phenomenon easily occurs, the noises are heavy, much energy is consumed, the antijamming capability is poor and the manufacturing cost is high. The shredder provided by the invention comprises a direct current motor and a control circuit, wherein the control circuit comprises a paper-inlet induced circuit, a speed feedback circuit, an MCU (Microprogrammed Control Unit), a positive and negative rotating switchover circuit, a voltage speed-regulating circuit, a rectifying circuit and a power circuit, the paper-inlet induced circuit is used for outputting a starting signal to start operation of the motor, the speed feedback circuit is used for feeding the rotate speed of the motor back to the MCU in a square-wave voltage signal form, the MCU is used for processing and calculating the signal fed by the paper-inlet induced circuit and the speed feedback circuit, the positive and negative rotating switchover circuit can switch the rotating direction of the motor, the voltage speed-regulating circuit is composed of an insulated gate bipolar transistor and a driving circuit of the insulated gate bipolar transistor and can regulate the rotating speed of the motor, the rectifying circuit is used for supplying power for the motor, and the power circuit is used for supplying power for the paper-inlet induced circuit, the speed feedback circuit, the MCU, the positive and negative rotating switchover circuit and the voltage speed-regulating circuit. The shredder provided by the invention has the advantages that the paper jamming phenomenon difficultly occurs, the noises are small, the energy is saved, the antijamming capability strong, and the cost is low.
Description
Technical field
The present invention relates to the crushing mechanism field, relate in particular to shredder.
Background technology
At present, people are leaked for avoiding secret, with shredder classified papers are cut into fine debris usually, to realize secret purpose.
Shredder comprises the paper shredding mechanism of being made up of the blade of one group of rotation, paper comb and motor etc., and control circuit, and comes the rotation of drive motors drive blade that paper is cut into fine debris by this control circuit, realizes shredded paper work.During shredder work, motor rotates and produces noise, contaminated environment, and the influence office, and it is many to expend electric weight, wastes energy.
For reducing the noise that shredder produces, cut down the consumption of energy, those skilled in the art proposes a kind of intelligent speed-regulating shredder.The alternating voltage zero-crossing that this shredder comprises motor, power supply, the current of electric sampling unit that is connected with motor, be connected with power supply detects the single-chip microcomputer central processing system that sampling unit, phase angle speed governing unit and input and output are connected with phase angle speed governing unit with the current of electric sampling unit respectively; Electric current by the current of electric sampling unit during to motor rotation is taken a sample, current sampling signal sent in the single-chip microcomputer central processing system it is handled computing, and by phase angle speed governing unit motor is carried out speed governing according to operation result, thereby reach noise reduction and purpose of energy saving.But also there is following deficiency in this intelligent speed-regulating shredder:
(1) when going into the paper amount when exceeding maximum paper feed amount, paperboard influences operating efficiency easily.
(2) single-chip microcomputer central processing system inside programming difficulty is big, causes technical staff's inefficiency, and the working time is long, and then causes the manufacturing cost height of shredder.
(3) in the shredder course of work, motor speed is sometimes fast and sometimes slow, and is low when high when causing noise that shredder produces, have a strong impact on office, and power consumption is many.
(4) control circuit complexity causes the manufacturing cost height of shredder, energy consumption height and poor anti jamming capability.
As fully visible, big, the big energy-consuming of the easy paperboard of existing shredder, noise, poor anti jamming capability and manufacturing cost height.
Summary of the invention
Easy paperboard, noise that existing shredder exists are big in order to solve, big energy-consuming, poor anti jamming capability and the high problem of manufacturing cost, and the inventor conscientiously researchs and analyses discovery to existing shredder:
The easy paperboard of existing shredder can't realize that because of it motor counter-rotating is withdrawed from paper and caused.Noise is greatly because be used for feedback load big or small wayward of the current of electric sample circuit of feedback motor speed, causes that motor speed is sometimes fast and sometimes slow to be caused.The reason of poor anti jamming capability mainly is to adopt controllable silicon to regulate electric moter voltage, and controllable silicon is subject to the influence of extraneous electrical network.The reason that manufacturing cost is high is to need to add alternating voltage zero-crossing when adopting controllable silicon to regulate electric moter voltage in control circuit to detect sample circuit, and the circuit complexity has increased electrical equipment and wiring difficulty; When judging motor speed according to the electric current of the electric current of motor and the corresponding relation between the rotating speed and current of electric sample circuit feedback, the difference of the type of motor and residing voltage environment thereof all can cause the electric current of motor different with the corresponding relation of rotating speed, the difficulty that causes programming is big, and the working time that takies the technical staff is long.The energy consumption height be because the noise that shredder produces is big, control circuit power consumption many due to.
The present invention proposes a kind of shredder, comprises direct current generator and control circuit, and this control circuit also comprises:
Go into the paper sensor circuit, the output of this circuit is connected with the input of MCU, and enabling signal is delivered among the described MCU, connects described control circuit, starts described direct current generator running;
Velocity feedback circuits, the output of this circuit is connected with the input of described MCU, and the rotating speed of described direct current generator is fed back among the described MCU with the square wave voltage signal form;
MCU goes into the signal that paper sensor circuit and described velocity feedback circuits are sent into for the treatment of computing is described;
The rotating commutation circuit, the input of this circuit is connected with the output of described MCU, and output is connected with described direct current generator;
The adjusting velocity by voltage circuit, drive circuit by insulated gate bipolar transistor, metal oxide semiconductor field effect tube or Darlington transistor and corresponding coupling is formed, and input is connected with the output of described MCU, output is connected with described direct current generator, and regulates the rotating speed of described direct current generator according to the operation result of described MCU;
Rectification circuit, the input of this circuit is connected with external ac power source, and output is connected with described direct current generator;
Power circuit is respectively described go into paper sensor circuit, velocity feedback circuits, MCU, rotating commutation circuit and adjusting velocity by voltage circuit supply.
Be provided with the rotating commutation circuit in the control circuit of this shredder, can adjust turning to of direct current generator at any time according to the paper feed amount, so that when paper feed amount during greater than the maximum paper feed amount of shredder, switch turning to of direct current generator, make its counter-rotating, and then the paper in the paper feed port withdrawed from, be difficult for paperboard.Cooperatively interact by velocity feedback circuits, adjusting velocity by voltage circuit and MCU, realize the adjusting to dc motor speed, and the rotation speed change of direct current generator is steady, noise is little, and power consumption is few, and is energy-conservation.The adjusting velocity by voltage circuit adopts the drive circuit of insulated gate bipolar transistor, metal oxide semiconductor field effect tube or Darlington transistor and corresponding coupling to regulate the supply voltage of direct current generator, antijamming capability is strong, and in adjustment process, direct current generator voltage is stable, need not use alternating voltage zero-crossing to detect sample circuit, simplify control circuit, reduced the production cost of shredder.Utilize direct current generator as power source, the direct current generator low price has further reduced the manufacturing cost of shredder.
Preferably, described velocity feedback circuits comprises Hall element, and this Hall element is for detection of the rotating speed of described direct current generator.Like this, velocity feedback circuits adopts Hall element to detect the rotating speed of direct current generator, and the corresponding relation of sending between the pulse width set-point of the expression desired speed of setting among the pulse width of square wave voltage signal of the sign dc motor speed among the MCU and the MCU is simple, programming is simple, shortened the programming time, improve operating efficiency, further reduced the manufacturing cost of shredder.
Preferably, the drive circuit of described insulated gate bipolar transistor comprises triode, resistance, electric capacity and voltage-stabiliser tube; The colelctor electrode of first triode and second triode is connected with described power circuit by resistance respectively; The base stage of described first triode and the 3rd triode all is connected with the colelctor electrode of described second triode and by capacity earth, emitter stage interconnects and is connected with the grid of described insulated gate bipolar transistor by resistance; The base stage of described second triode is connected with the output of described MCU by resistance, and emitter stage is connected with the colelctor electrode of described the 3rd triode and ground connection; Described voltage-stabiliser tube is in parallel with resistance, and anodal is connected with the grid of described insulated gate bipolar transistor, and negative pole is connected with the emitter stage of described insulated gate bipolar transistor.Such adjusting velocity by voltage circuit adjustment performance is good, and the rotation speed change of direct current generator is steady, and noise is little, and circuit is simple, low cost of manufacture, and then reduced the manufacturing cost of shredder.
Preferably, describedly go into the paper sensor circuit and comprise that infrared emission receives pipe, and this infrared emission receives pipe is used for detecting the paper signal and goes into the paper signal and be converted into enabling signal described.Like this, adopt infrared emission to receive pipe is detectedly gone into it paper signal and is converted into enabling signal, be quick on the draw, the accuracy in detection height can avoid direct current generator in the shredder to connect because receiving that wrong enabling signal starts, and then the minimizing power consumption, energy savings.
Preferably, described rotating commutation circuit comprises first relay and this first relay drive circuit, and being used for the described direct current generator of control just changes; Second relay and this second relay drive circuit are used for the described direct current generator counter-rotating of control.Further, described first relay drive circuit and described second relay drive circuit are formed by triode, diode and resistance, and the base stage of described triode is connected with the output of described MCU by resistance and passes through resistance eutral grounding, colelctor electrode is connected grounded emitter by diode with described power circuit.Adopt relay as the switch of control direct current generator current switching; can play the effect of automatic adjusting, safeguard protection and change-over circuit to direct current generator; and then can avoid electrical equipment in direct current generator and the control circuit because of electric current and/or voltage is excessive damages, improved the security performance of shredder.
Preferably, described power circuit comprises transforming circuit and current rectifying and wave filtering circuit.Further, described current rectifying and wave filtering circuit adopts bridge rectifier rectification, capacitor filtering.Further preferably, described adjusting velocity by voltage circuit and magnitude of voltage in the described power circuit are that the output of 18V is connected, described rotating commutation circuit and magnitude of voltage in the described power supply road are that the output of 12V is connected, described go into paper sensor circuit, velocity feedback circuits and MCU all with described power circuit in magnitude of voltage be that the output of 5V is connected.Like this, can reduce alternating voltage earlier before carrying out rectifying and wave-filtering, reduce the sectional pressure element of rectification filter circuit output end, and adopted capacitor filtering, circuit is simple, the low cost of manufacture of shredder.
The control circuit of shredder of the present invention adopts velocity feedback circuits, adjusting velocity by voltage circuit, rotating commutation circuit and MCU to cooperatively interact, realized the rotating speed of the direct current generator in the shredder and the automatic adjusting that turns to, easy to use, and be difficult for paperboard, the noise that produces is little, and power consumption is few.Utilize Hall element to detect the rotating speed of direct current generator, make the programming of MCU inside simple, reduced the manufacturing cost of shredder.Utilize the supply voltage of the drive circuit adjusting direct current generator of insulated gate bipolar transistor, metal oxide semiconductor field effect tube or Darlington transistor and corresponding coupling, antijamming capability is strong, simplify control circuit, further reduced the manufacturing cost of shredder.Utilize the infrared emission reception will detect into the paper signal pipe and be converted into enabling signal, the accuracy in detection height can reduce power consumption.Utilize the break-make of relay control control of DC circuit, security performance is good.
Description of drawings
The theory diagram of the control circuit when Fig. 1 is being connected with external ac power source of shredder of the present invention;
Fig. 2 is the control circuit figure of shredder of the present invention;
Fig. 3 is the timing waveform of the output voltage of the output voltage of the MCU in the control circuit of shredder of the present invention and adjusting velocity by voltage circuit.
The specific embodiment
As shown in Figure 1, shredder of the present invention comprises direct current generator 1 and is used for the control circuit that this direct current generator 1 of control is worked.Control circuit comprises power circuit 2, goes into paper sensor circuit 3, velocity feedback circuits 4, MCU (Micro Control Unit claim micro-control unit again) 5, adjusting velocity by voltage circuit 6, rotating commutation circuit 7 and rectification circuit 8.Wherein, power circuit 2 alternating current that external ac power source 9 is provided is converted to direct current for going into paper sensor circuit 3, velocity feedback circuits 4, MCU5, adjusting velocity by voltage circuit 6 and 7 power supplies of rotating commutation circuit.Go into that paper sensor circuit 3 is connected with MCU5 and it is detectedly gone into the paper signal and be converted into enabling signal and send among the MCU5, to connect control circuit, start direct current generator 1 and carry out shredded paper work.Velocity feedback circuits 4 is connected with MCU5 with direct current generator 1 and the rotating speed of detected direct current generator 1 form with square wave voltage signal is fed back among the MCU5.MCU5 handles computing to the signal of going into paper sensor circuit 3 and velocity feedback circuits 4 and sending into, and sends instruction according to operation result to adjusting velocity by voltage circuit 6, regulates the voltage of direct current generator 1, thereby realizes the adjusting to its rotating speed.Rotating commutation circuit 7 is connected with direct current generator 1 with adjusting velocity by voltage circuit 6, and switches turning to of direct current generator 1 according to the adjusting result of the supply voltage of 6 pairs of direct current generators 1 of adjusting velocity by voltage circuit.Rectification circuit 8 is converted to direct current with the alternating current that external ac power source 9 provides, and is direct current generator 1 power supply.
As shown in Figure 2, power circuit 2 comprises transforming circuit and current rectifying and wave filtering circuit.Wherein, the transformer T1 in the transforming circuit is connected with external ac power source by connecting plug-in unit J5, so that the alternating voltage on the input that is added in current rectifying and wave filtering circuit is carried out step-down.Preferably, between connection plug-in unit J5 and external ac power source, be provided with protective tube F1, with protection power circuit 2.Current rectifying and wave filtering circuit is by adopting four bridge rectifiers that diode D6-D9 forms, six capacitor C 2 and C5-C9, resistance R 16 and voltage-stabiliser tube U1 composition.Like this, current rectifying and wave filtering circuit adopts the bridge rectifier rectification, capacitor filtering, and circuit is simple.Certainly, current rectifying and wave filtering circuit also can adopt other modes to carry out rectifying and wave-filtering.Like this, power circuit adopts transforming circuit that the alternating voltage that is added on the current rectifying and wave filtering circuit input is carried out step-down, so that the required DC voltage of current rectifying and wave filtering circuit output control circuit.Power circuit 2 is used for to 6 power supplies of adjusting velocity by voltage circuit at the node place of resistance R 16 and capacitor C 9 output 18V voltage; At the node place of resistance R 16 and capacitor C 5 output 12V voltage, be used for to 7 power supplies of rotating commutation circuit; At the node place of voltage-stabiliser tube U1 and capacitor C 6 output 5V voltage, be used for to going into paper sensor circuit 3, velocity feedback circuits 4 and MCU5 power supply.
As shown in Figure 2, go into paper sensor circuit 3 and receive pipe L, connect plug-in unit J2 and four resistance R 2-R5 form by infrared emission, and output is connected with the input of MCU5, and be installed in the paper feed port place of shredder.When paper enters paper feed port, infrared emission receives pipe L is converted into the signal of telecommunication with detected optical signal as going into the paper signal earlier, again this signal of telecommunication is sent among the MCU5 as enabling signal, and MCU5 controls direct current generator 1 running after receiving this enabling signal, and the rotating shaft of direct current generator 1 is rotated.Like this go into the highly sensitive of paper sensor circuit, accuracy in detection height.
As shown in Figure 2, velocity feedback circuits 4 is made up of Hall element U1881, resistance R 1, capacitor C 1 and the bar magnet that is arranged in the rotating shaft of direct current generator 1, and input is connected with direct current generator 2, and output is connected with the input of MCU5.When the rotating shaft of direct current generator 1 was rotated, magnet rotated with the rotating shaft of direct current generator 1, and the square wave voltage signal of the rotating speed of the magnetic field output sign direct current generator 1 of the variation that produces when Hall element U1881 rotates according to magnet is to MCU5.After MCU5 receives this square wave voltage signal, the pulse width that can computing draws this square wave voltage signal, and the pulse width set-point of the expression desired speed set among the pulse width of this square wave voltage signal and the MCU5 compared, thereby regulate the supply voltage of direct current generator 1 according to comparing result, and then realize the adjusting to the rotating speed of direct current generator 1.
As shown in Figure 2, adjusting velocity by voltage circuit 6 is made up of insulated gate bipolar transistor Q3 (Insulated Gate Bipolar Transistor, be called for short IGBT) and drive circuit thereof, and input is connected with the output of MCU5, and output is connected with direct current generator 2.Drive circuit comprises triode Q4-Q6, voltage-stabiliser tube Z1, resistance R 11-15 and capacitor C 3.Wherein, the colelctor electrode of the first triode Q4 and the second triode Q5 is that the output of 18V is connected by voltage in resistance R 11 and R12 and the power circuit 2 respectively.The base stage of the first triode Q4 and the 3rd triode Q6 all is connected with the colelctor electrode of the second triode Q5 and by capacitor C 3 ground connection, emitter stage interconnects and is connected with the grid of insulated gate bipolar transistor Q3 by resistance R 13; The base stage of the second triode Q5 is connected with the output of MCU5 by resistance R 15, and emitter stage is connected with the colelctor electrode of the 3rd triode Q6 and ground connection.Voltage-stabiliser tube Z1 is in parallel with resistance R 14, and anodal is connected with the grid of insulated gate bipolar transistor Q3, and negative pole is connected with the emitter stage of insulated gate bipolar transistor Q3.Certainly, also can use metal oxide semiconductor field effect tube (Metal-Oxide-Semiconductor Field-Effect Transistor is called for short MOSFET) or the drive circuit of Darlington transistor and corresponding coupling to be used as the adjusting velocity by voltage circuit.
Like this, in the shredder course of work, the timing waveform of the output voltage of the output voltage of the MCU5 in the control circuit and adjusting velocity by voltage circuit 6 as shown in Figure 3, wherein, V1 is the timing waveform of pulse width modulation (PWM) signal of MCU5 output, and V2 is the timing waveform (namely being added to the voltage on the direct current generator 1) of adjusting velocity by voltage circuit 6 output voltage signals.During t1-t2 and t3-t4, the pwm signal voltage of MCU5 output is that 0V is when being low level, the second triode Q5 and the 3rd triode Q6 end, the 18V voltage that power circuit 2 provides is added on the base stage of the first triode Q4 by resistance R 12, make the first triode Q4 and insulated gate bipolar transistor Q3 conducting, work is carried out in direct current generator 1 energising.During t2-t3 and t4-t5, the pwm signal voltage of MCU5 output is that 5V is when being high level, the base stage of the second triode Q5 has the electric current inflow to make the second triode Q5 conducting, and the collector voltage of the second triode Q5 is 0.2V, and making the first triode Q4 is that 0.2V ends because of base voltage, and the 3rd triode Q6 conducting, at this moment, the grid of insulated gate bipolar transistor Q3 ends insulated gate bipolar transistor Q3 by the 3rd triode Q6 discharge, and direct current generator 1 outage quits work.
As shown in Figure 2, rotating commutation circuit 7 comprises the first relay Y1 and drive circuit 71, the second relay Y2 and drive circuit 72 thereof, and input is connected with the output of MCU5, and output is connected with direct current generator 1.Wherein, the drive circuit 71 of the first relay Y1 is made up of the 4th triode Q1, diode D1 and resistance R 6 and R8, and the base stage of the 4th triode Q1 is passed through, and resistance R 6 is connected with the output of MCU5 and pass through resistance R 8 ground connection, colelctor electrode is that the output of 12V is connected grounded emitter by diode D1 and output voltage in the power circuit 2.The drive circuit 72 of the second relay Y2 is made up of the 5th triode Q2, diode D2 and resistance R 9 and R10, and identical with the structure of the drive circuit 71 of the first relay Y1.When the 4th triode Q1 conducting, the first relay Y1 conducting, the running of direct current generator 1 forward; When the 5th triode Q2 conducting, the second relay Y2 conducting, direct current generator 1 antiport.
As shown in Figure 2, rectification circuit 8 is connected with external ac power source by protective tube F1, converts alternating current to direct current to give direct current generator 1 power supply, simultaneously, and protective tube F1 holding circuit.The output voltage of rectification circuit 8 offers direct current generator 1 after adjusting velocity by voltage circuit 6 is regulated, and offers the sense of current of direct current generator 1 by rotating commutation circuit 7 control rectification circuits 8.Like this, in the shredder course of work, can regulate its rotating speed by the supply voltage that adjusting velocity by voltage circuit 6 is regulated direct current generator 1, by the sense of current in the rotating commutation circuit 7 switching direct current generators 1, and then switch turning to of direct current generator 1.
The course of work of shredder of the present invention is as follows:
Go into and send enabling signal to MCU5 after paper sensor circuit 3 detects the paper feed port that paper enters shredder, control direct current generator 1 started running after MCU5 received this enabling signal.When the rotating shaft of direct current generator 1 is rotated, the bar magnet that is positioned in its rotating shaft rotates with rotating shaft, and the Hall element U1881 in the velocity feedback circuits 4 exports the square wave voltage signal of the rotating speed that characterizes direct current generator 1 to MCU5 according to the magnetic field that magnet rotates the variation that produces.MCU5 carries out computing drawing the pulse width of this square wave voltage signal to it after receiving this square wave voltage signal, and the pulse width set-point of the expression desired speed of the pulse width of this square wave voltage signal and the setting among the MCU5 is compared.
When the load of shredder less, when being the paper feed amount less than maximum paper feed amount, the pulse width of the square wave voltage signal that is drawn by the MCU5 computing is less than the pulse width set-point of the expression desired speed of the setting among the MCU5, the rotating speed of direct current generator 1 is greater than the desired speed among the MCU5, at this moment, the pwm signal of an EDM Generator of Adjustable Duty Ratio of MCU5 output is in adjusting velocity by voltage circuit 6.Adjusting velocity by voltage circuit 6 reduces the supply voltage of direct current generator 1 according to pwm signal, make it identical with desired speed among the MCU5 with the rotating speed that slows down direct current generator 1, and then the desired speed among the relative MCU5 of the rotating speed that makes direct current generator 1 is constant, make the rotating speed of direct current generator 1 steady, to avoid direct current generator 1 when lacking paper or not having paper, to produce the noise of high-decibel because rotating speed is too fast, improve the working environment quality.
When the load of shredder bigger, when being the paper feed amount greater than maximum paper feed amount, the pulse width of the square wave voltage signal that is drawn by the MCU5 computing is greater than the pulse width set-point of the expression desired speed of the setting among the MCU5, the rotating speed of direct current generator 1 is less than the desired speed among the MCU5, at this moment, the pwm signal of an EDM Generator of Adjustable Duty Ratio of MCU5 output is in adjusting velocity by voltage circuit 6.Adjusting velocity by voltage circuit 6 is heightened the supply voltage of direct current generator 1 according to pwm signal, improving the rotating speed of direct current generator 1, and then makes the rotating speed of direct current generator 1 identical with desired speed among the MCU5.When the alternating current voltage of the supply voltage correspondence of direct current generator 1 is 220V, if the rotating speed of direct current generator 1 is still less than the desired speed among the MCU5, then MCU5 sends to rotating commutation circuit 7 and turns to switching signal, make second relay Y2 conducting control direct current generator, 1 counter-rotating in the rotating commutation circuit 7 move back paper, and then the excessive paperboard of load of avoiding shredder to bear because of direct current generator.
Claims (9)
1. a shredder is characterized in that, comprises direct current generator and control circuit, and this control circuit also comprises: go into the paper sensor circuit, the output of this circuit is connected with the input of MCU, and enabling signal is delivered among the described MCU, connect described control circuit, start described direct current generator running;
Velocity feedback circuits, the output of this circuit is connected with the input of described MCU, and the rotating speed of described direct current generator is fed back among the described MCU with the square wave voltage signal form;
MCU goes into the signal that paper sensor circuit and described velocity feedback circuits are sent into for the treatment of computing is described;
The rotating commutation circuit, the input of this circuit is connected with the output of described MCU, and output is connected with described direct current generator;
The adjusting velocity by voltage circuit, drive circuit by insulated gate bipolar transistor, metal oxide semiconductor field effect tube or Darlington transistor and corresponding coupling is formed, and input is connected with the output of described MCU, output is connected with described direct current generator, and regulates the rotating speed of described direct current generator according to the operation result of described MCU;
Rectification circuit, the input of this circuit is connected with external ac power source, and output is connected with described direct current generator;
Power circuit is respectively described go into paper sensor circuit, velocity feedback circuits, MCU, rotating commutation circuit and adjusting velocity by voltage circuit supply.
2. shredder according to claim 1 is characterized in that, described velocity feedback circuits comprises Hall element, and this Hall element is for detection of the rotating speed of described direct current generator.
3. shredder according to claim 1 and 2 is characterized in that, the drive circuit of described insulated gate bipolar transistor comprises triode, resistance, electric capacity and voltage-stabiliser tube; The colelctor electrode of first triode and second triode is connected with described power circuit by resistance respectively; The base stage of described first triode and the 3rd triode all is connected with the colelctor electrode of described second triode and by capacity earth, emitter stage interconnects and is connected with the grid of described insulated gate bipolar transistor by resistance; The base stage of described second triode is connected with the output of described MCU by resistance, and emitter stage is connected with the colelctor electrode of described the 3rd triode and ground connection; Described voltage-stabiliser tube is in parallel with resistance, and anodal is connected with the grid of described insulated gate bipolar transistor, and negative pole is connected with the emitter stage of described insulated gate bipolar transistor.
4. shredder according to claim 1 and 2 is characterized in that, describedly go into the paper sensor circuit and comprise that infrared emission receives pipe, and this infrared emission receives pipe is used for detecting the paper signal and goes into the paper signal and be converted into enabling signal described.
5. shredder according to claim 1 and 2 is characterized in that, described rotating commutation circuit comprises first relay and this first relay drive circuit, and being used for the described direct current generator of control just changes; Second relay and this second relay drive circuit are used for the described direct current generator counter-rotating of control.
6. shredder according to claim 5, it is characterized in that, described first relay drive circuit and described second relay drive circuit are formed by triode, diode and resistance, and the base stage of described triode is connected with the output of described MCU by resistance and passes through resistance eutral grounding, colelctor electrode is connected grounded emitter by diode with described power circuit.
7. shredder according to claim 1 and 2 is characterized in that, described power circuit comprises transforming circuit and current rectifying and wave filtering circuit.
8. shredder according to claim 7 is characterized in that, described current rectifying and wave filtering circuit adopts bridge rectifier rectification, capacitor filtering.
9. shredder according to claim 8, it is characterized in that, described adjusting velocity by voltage circuit and magnitude of voltage in the described power circuit are that the output of 18V is connected, described rotating commutation circuit and magnitude of voltage in the described power supply road are that the output of 12V is connected, described go into paper sensor circuit, velocity feedback circuits and MCU all with described power circuit in magnitude of voltage be that the output of 5V is connected.
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| CN2013101912912A CN103263969A (en) | 2013-05-22 | 2013-05-22 | Shredder |
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| CN2013101912912A CN103263969A (en) | 2013-05-22 | 2013-05-22 | Shredder |
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| CN104457795A (en) * | 2013-09-17 | 2015-03-25 | 上海震旦办公设备有限公司 | Paper jamming judgment method for paper shredder |
| CN106345586A (en) * | 2016-09-29 | 2017-01-25 | 北京世纪金图科技有限公司 | Hard disk crushing machine |
| CN111064399A (en) * | 2020-01-17 | 2020-04-24 | 武汉中岩科技股份有限公司 | Full closed-loop direct current motor control system based on pipeline robot |
| CN112271978A (en) * | 2020-11-09 | 2021-01-26 | 广州市阳光科密电子科技有限公司 | Motor control circuit and paper shredder with same |
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| CN201644201U (en) * | 2010-01-27 | 2010-11-24 | 罗世凯 | Intelligent speed-regulating, energy-saving and noise-reducing paper shredder |
| CN201701986U (en) * | 2010-04-23 | 2011-01-12 | 罗世凯 | Intelligent speed-adjusting paper shredder |
| CN102340269A (en) * | 2011-08-11 | 2012-02-01 | 上海中科深江电动车辆有限公司 | Forward and reverse rotation control circuit structure of direct current motor |
| CN103301925A (en) * | 2013-05-10 | 2013-09-18 | 广州科密股份有限公司 | Speed-changing anti-blocking anti-jamming paper shredder circuit and control method of motor thereof |
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| CN104457795A (en) * | 2013-09-17 | 2015-03-25 | 上海震旦办公设备有限公司 | Paper jamming judgment method for paper shredder |
| 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 |
| CN106345586A (en) * | 2016-09-29 | 2017-01-25 | 北京世纪金图科技有限公司 | Hard disk crushing machine |
| CN111064399A (en) * | 2020-01-17 | 2020-04-24 | 武汉中岩科技股份有限公司 | Full closed-loop direct current motor control system based on pipeline robot |
| CN111064399B (en) * | 2020-01-17 | 2021-08-06 | 武汉中岩科技股份有限公司 | Full closed-loop direct current motor control system based on pipeline robot |
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Application publication date: 20130828 |