CN106655100A - Intelligent control system based on over current protection circuit - Google Patents
Intelligent control system based on over current protection circuit Download PDFInfo
- Publication number
- CN106655100A CN106655100A CN201610890206.5A CN201610890206A CN106655100A CN 106655100 A CN106655100 A CN 106655100A CN 201610890206 A CN201610890206 A CN 201610890206A CN 106655100 A CN106655100 A CN 106655100A
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- Prior art keywords
- triode
- resistance
- polar capacitor
- poles
- negative pole
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
- H02H7/1257—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers responsive to short circuit or wrong polarity in output circuit
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/125—Avoiding or suppressing excessive transient voltages or currents
Abstract
The invention discloses an intelligent control system based on an over current protection circuit, which is mainly composed of a time base integrated chip U3, a diode rectifier U1, a triode VT2, an over current protection circuit, a three-end voltage stabilizing circuit, a magnetic control circuit connected with the time base integrated chip U3 and the triode VT2 respectively, and a double-control circuit connected with the A input end of the diode rectifier U1. A magnetic switch CK and a peripheral circuit are combined to control on and off of a lighting lamp LM and an air exchange fan MAC; voltage stabilizing processing can be carried out on input voltage, the inputted voltage is more stable, the stability of the system of the invention is well improved, and automatic on and off of the lighting lamp LM and the air exchange fan MAC can be well controlled.
Description
Technical field
The present invention relates to a kind of energy-saving control system, and in particular to be a kind of Based Intelligent Control based on current foldback circuit
System.
Background technology
With the continuous improvement of people's living standard, the also more and more higher of the requirement to living environment, people are in order that health
Between air quality more preferably, just the air quality of toilet is improved using ventilation fan, while illuminating lamp can be passed through at night
To improve the brightness in toilet.Using two independent mechanical switch come to respectively to ventilation fan and illuminating lamp more than current people
Open and close be controlled, and need people to pass through manually operated twice just to complete to illuminating lamp and ventilation when in use
That what is fanned is turned on and off.However, people when in use often open illuminating lamp after forget to turn on ventilation fan, make toilet
Peculiar smell in air can not timely be discharged, and so as to can not well improve the air quality of toilet, serious have impact on
People's is healthy.
The content of the invention
It is an object of the invention to overcome independent using two more than the illuminating lamp and ventilation fan of the toilet of prior art
Mechanical switch needs when in use people to pass through two being controlled to the open and close respectively to ventilation fan and illuminating lamp
The secondary manually operated defect being turned on and off that just can be completed to illuminating lamp and ventilation fan, there is provided one kind can be to illuminating lamp and ventilation
The control system that fan is opened and closed automatically.
The present invention is achieved through the following technical solutions：A kind of intelligence control system based on current foldback circuit, mainly
By when base integrated chip U3, diode rectifier U1, triode VT2, positive pole is connected with the B inputs of diode rectifier U1
Connect, the A inputs of negative pole and diode rectifier U1 be collectively forming control system input polar capacitor C6, one end and pole
Property electric capacity C6 positive pole be connected, the resistance R9 that the other end is connected with the negative pole of polar capacitor C6, positive pole with when basis set Cheng Xin
The polar capacitor C2 that the THOLD pins of piece U3 are connected, negative pole is connected Jing after resistance R4 with the base stage of triode VT2, one end
Be connected with the emitter stage of triode VT2, the other end with when base integrated chip U2 the adjustable resistance that is connected of CVOLT pins
R5, one end with when base integrated chip U2 CVOLT pins be connected, the electricity that the other end is connected with the colelctor electrode of triode VT2
Resistance R6, positive pole is connected with the colelctor electrode of field triode VT2, negative pole sequentially Jing after relay K and resistance R7 with when basis set Cheng Xin
The polar capacitor C4 that the OUT pins of piece U2 are connected, N poles are connected with relay K with the tie point of resistance R7, P poles and polarity
The diode D3 that the negative pole of electric capacity C4 is connected, the current foldback circuit being connected with the A inputs of diode rectifier U1, point
Not with when the VCC pins of base integrated chip U3 and the cathode output end and cathode output end of diode rectifier U1 be connected
Three-terminal voltage-stabilizing circuit, respectively with when base integrated chip U3 and triode VT2 the magnetic control circuit that is connected of colelctor electrode, and with two
The dual control circuit composition that the A inputs of pole pipe rectifier U1 are connected.
The THOLD pins of base integrated chip U2 are connected respectively with DISCHG pins and VCC pins when described；Base when described
The RESET pins of integrated chip U2 are connected with VCC pins, its GND pins ground connection；The magnetic control circuit respectively with when basis set into
The THOLD pins of chip U2 are connected with DIS pins and VCC pins；Wherein the one of the normally opened contact K-2 of the relay K
End is connected with the negative pole of polar capacitor C6, the output end of the other end and current foldback circuit is collectively forming the first of control system
Output end；Wherein one end of the normally opened contact K-1 of the relay K is connected with the negative pole of polar capacitor C6, its other end with
The output end of dual control circuit is collectively forming the second output end of control system.
The current foldback circuit by triode VT3, triode VT4, triode VT5, triode VT6, triode VT7,
The polarity electricity that positive pole is connected Jing after resistance R12 with the emitter stage of triode VT4, negative pole is connected with the base stage of triode VT4
Hold C9, the diode D5 that P poles are connected with the positive pole of polar capacitor C9, N poles are connected with the colelctor electrode of triode VT3, P poles Jing
Be connected with the emitter stage of triode VT4 after resistance R13, the diode D6 that N poles are connected with the colelctor electrode of triode VT6, one
End is connected with the base stage of triode VT6, the resistance R14 that the other end is connected with the colelctor electrode of triode VT4, positive pole and three poles
The polar capacitor C10 that the base stage of pipe VT5 is connected, negative pole is connected with the base stage of triode VT7, one end is with triode VT3's
The resistance R15 that base stage is connected, the other end is connected with the base stage of triode VT7, positive pole is connected with the emitter stage of triode VT5
Ground connection, the polar capacitor C11 that is connected with the emitter stage of triode VT6 of negative pole after connecing, the emitter stage phase of one end and triode VT6
Connection, the resistance R17 of other end ground connection, one end is connected with the base stage of triode VT3, the resistance R16 of other end ground connection, and
The polar capacitor C12 being grounded after positive pole is connected with the base stage of triode VT7, negative pole is connected with the emitter stage of triode VT7
Composition；The colelctor electrode of the triode VT4 is also connected with the base stage of triode VT5；The colelctor electrode and three of the triode VT5
The base stage of pole pipe VT6 is connected；The emitter stage of the triode VT6 is also connected with the colelctor electrode of triode VT7；The polarity
The negative pole of electric capacity C12 is also connected with the negative pole of polar capacitor C10；The grounded emitter of the triode VT3；The polarity electricity
Hold the output end of the negative pole as current foldback circuit of C11.
By voltage stabilizing chip U3, negative pole is connected the three-terminal voltage-stabilizing circuit with the GND pins of voltage stabilizing chip U2, positive pole Jing is electric
The polar capacitor C5 that is connected with the VDD pins of voltage stabilizing chip U2 after resistance R8, and the OUT pin phases of N poles and voltage stabilizing chip U2
The Zener diode D2 compositions that connection, P poles are connected with the negative pole of polar capacitor C5；The N poles of the Zener diode D2 and when
The VCC pins of base integrated chip U3 are connected；The negative pole of the polar capacitor C5 and the cathode output end of diode rectifier U1
It is grounded after being connected；The VDD pins of voltage stabilizing chip U2 are connected with the cathode output end of diode rectifier U1.
The magnetic control circuit by magnetic switch CK, FET MOS, triode VT1, the grid of one end and FET MOS
Be connected, the resistance R1 that the other end is connected with wherein one end of magnetic switch CK, P poles are connected with the emitter stage of triode VT1,
The diode D1 that N poles are connected Jing after resistance R2 with the source electrode of FET MOS, positive pole is connected with the base stage of triode VT1,
Negative pole with when base integrated chip U2 the polar capacitor C1 that is connected of DISCHG pins, the colelctor electrode phase of one end and triode VT1
Connection, the inductance L that is connected with the negative pole of polar capacitor C1 of the other end, and positive pole are connected with the N poles of diode D1, negative pole
The polar capacitor C3 compositions being connected with the drain electrode of FET MOS Jing after resistance R3；The other end and three of the magnetic switch CK
The colelctor electrode of pole pipe VT1 is connected；The N poles of the diode D1 with when base integrated chip U2 TRIG pins be connected；It is described
The drain electrode of FET MOS is grounded after being connected with the colelctor electrode of triode VT2.
By bidirectional thyristor V, N poles are connected the dual control circuit with the control end of bidirectional thyristor V, the photosensitive electricity of P poles Jing
The diode D4 being connected with the A inputs of diode rectifier U1 after resistance RG, positive pole is connected, bears with the P poles of diode D4
The polar capacitor C8 that pole is connected with the first anode of bidirectional thyristor V, and negative pole Jing after adjustable resistance R11 with diode D4
P poles be connected, polar capacitor C7 that positive pole is connected Jing after resistance R10 with the second plate of bidirectional thyristor V composition；It is described
The positive pole of polar capacitor C7 is collectively forming the second output end of control system with the normally opened contact K-1 of relay K；The polarity electricity
The negative pole for holding C8 is also connected with the A inputs of diode rectifier U1.
To guarantee the practical effect of the present invention, the magnetic switch CK is by open type tongue tube AG and alnico magnets
The magnetic switch of ZT compositions, wherein one end of the open type tongue tube AG and the grid phase Jing after resistance R1 with FET MOS
Connection, the other end are connected with the colelctor electrode of triode VT1；Voltage stabilizing chip U2 is W7800 integrated chips；Basis set when described
It is NE555 integrated chips into chip U3.
The present invention has compared with prior art advantages below and beneficial effect：
(1) present invention can by magnetic switch CK in combination with peripheral circuit to the unlatching of illuminating lamp LM and ventilation fan MAC and
Closing is controlled, and the present invention can carry out voltage stabilizing process to input voltage, makes the voltage of input more stable, improves well
The stability of the present invention, ensures that the present invention can well control illuminating lamp LM and ventilation fan MAC is automatically turned on
With closing, can well improve the air quality of toilet, serious have impact on the healthy of people.
(2) instant high-voltage produced in present invention energy output voltage is eliminated or suppressed, and can be effectively prevented this
The backend electronics element of invention and load are damaged by high voltage, ensure that the stability and reliability of the output voltage of the present invention
Property.
(3) when base integrated chip U3 of the invention preferentially employs NE555 integrated chips to realize, the chip is electric with periphery
Road combines, and can effectively improve the present invention automatically turning on and the control effect closed to illuminating lamp LM and ventilation fan MAC.
Description of the drawings
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the electrical block diagram of the current foldback circuit of the present invention.
Specific embodiment
The present invention is described in further detail with reference to embodiment, but embodiments of the present invention not limited to this.
Embodiment
As shown in figure 1, a kind of intelligence control system based on current foldback circuit of the present invention, mainly by when basis set Cheng Xin
Piece U3, diode rectifier U1, triode VT2, resistance R4, adjustable resistance R5, resistance R6, resistance R7, resistance R9, polar capacitor
C2, polar capacitor C4, polar capacitor C6, diode D3, relay K.Voltage stabilizing chip U3, resistance R8, polar capacitor C5, voltage stabilizing two
Pole pipe D2, current foldback circuit, magnetic control circuit, three-terminal voltage-stabilizing circuit, and dual control circuit composition.
For the practical effect of the present invention, base integrated chip U3 then preferentially employs NE555 collection when described described
Realize into chip；Diode rectifier U1 is the diode rectifier that 4 1N4001 diodes are formed；Triode VT2 is
3DG06 triodes, the resistance of resistance R4 is 10k Ω, and the resistance adjustable range of adjustable resistance R5 is 1～15k Ω, the resistance of resistance R6
It is worth for 20k Ω, the resistance of resistance R7 is 15k Ω, and the resistance of resistance R9 is 100k Ω；The capacitance of polar capacitor C2 be 100 μ F, pole
Property electric capacity C4 capacitance be 4.7 μ F, the μ F of capacitance 2.2 of polar capacitor C6；Diode D3 is 1N4006 diodes；Relay K is
JQX-15F type 24V/30A relays.
During connection, the positive pole of polar capacitor C6 is connected with the B inputs of diode rectifier U1, and negative pole is whole with diode
The A inputs of stream device U1 are collectively forming the input of control system and are connected with civil power.Resistance R9 one end is with polar capacitor C6's
Positive pole is connected, and the other end is connected with the negative pole of polar capacitor C6.The positive pole of polar capacitor C2 with when base integrated chip U3
THOLD pins are connected, and negative pole is connected Jing after resistance R4 with the base stage of triode VT2.One end of adjustable resistance R5 and three poles
The emitter stage of pipe VT2 is connected, the other end with when base integrated chip U2 CVOLT pins be connected.
Meanwhile, one end of resistance R6 with when base integrated chip U2 CVOLT pins be connected, the other end and triode VT2
Colelctor electrode be connected.The positive pole of polar capacitor C4 is connected with the colelctor electrode of field triode VT2, negative pole sequentially Jing relays K
With after resistance R7 with when base integrated chip U2 OUT pins be connected.The N poles of diode D3 and the company of relay K and resistance R7
Contact is connected, and P poles are connected with the negative pole of polar capacitor C4.Three-terminal voltage-stabilizing circuit respectively with when base integrated chip U3 VCC
Pin is connected with the cathode output end and cathode output end of diode rectifier U1.Magnetic control circuit respectively with when basis set Cheng Xin
Piece U3 is connected with the colelctor electrode of triode VT2.Current foldback circuit is connected with the A inputs of diode rectifier U1.It is double
Control circuit is connected with the A inputs of diode rectifier U1.
The THOLD pins of base integrated chip U2 are connected respectively with DISCHG pins and VCC pins when described；Base when described
The RESET pins of integrated chip U2 are connected with VCC pins, its GND pins ground connection；The magnetic control circuit respectively with when basis set into
The THOLD pins of chip U2 are connected with DIS pins and VCC pins；Wherein the one of the normally opened contact K-2 of the relay K
End is connected with the negative pole of polar capacitor C6, the output end of the other end and current foldback circuit is collectively forming the first of control system
Output end is simultaneously connected with ventilation fan MAC；Wherein one end of the normally opened contact K-1 of the relay K is negative with polar capacitor C6
Pole is connected, its other end and the output end of dual control circuit be collectively forming control system the second output end and with illuminating lamp LM phases
Connection.
Wherein, base integrated chip U3 when described, triode VT2, resistance R4, adjustable resistance R5, resistance R6, resistance R7, pole
Property electric capacity C2, polar capacitor C4, diode D3 and relay K define monostable time delay circuit.The monostable time delay circuit energy
By when the output of base integrated chip U3 low and high level conversion come the closure of the relay K in control circuit with disconnect, so as to
The voltage output of dual control circuit is controlled.Meanwhile, diode rectifier U1, resistance R9 and polar capacitor C6 form rectification filter
Wave circuit, current rectifying and wave filtering circuit diode rectifier U1 and resistance R9 and polar capacitor C6 defines current rectifying and wave filtering circuit,
During the civil power of input, diode rectifier U1 carries out rectification to the civil power being input into makes civil power be converted to DC voltage, polar capacitor
C6 and resistance R9 then carry out being depressured the DC voltage that current limliting obtains 12V, work of the voltage as control system to the DC voltage
Make voltage.
Further, described three-terminal voltage-stabilizing circuit is by voltage stabilizing chip U2, Zener diode D2, resistance R8, and polarity
Electric capacity C5 is constituted.
During connection, the negative pole of polar capacitor C5 is connected with the GND pins of voltage stabilizing chip U2, positive pole Jing after resistance R8 with it is steady
The VDD pins of pressure chip U2 are connected.The N poles of Zener diode D2 are connected with the OUT pins of voltage stabilizing chip U2, P poles and pole
The negative pole of property electric capacity C5 is connected.The N poles of the Zener diode D2 with when base integrated chip U3 VCC pins be connected；Institute
State polar capacitor C5 negative pole be connected with the cathode output end of diode rectifier U1 after be grounded；Voltage stabilizing chip U2
VDD pins are connected with the cathode output end of diode rectifier U1.What the three-terminal voltage-stabilizing circuit was exported to current rectifying and wave filtering circuit
12V DC voltages are carried out after voltage stabilizing and current stabilization as the direct-current working volts of rear portion circuit with stable.
In order to ensure the practical effect of the present invention, voltage stabilizing chip U2 then preferentially employs W7800 integrated chips
To realize；Meanwhile, the resistance of resistance R8 is 400k Ω, and the capacitance of polar capacitor C5 is 100 μ F；And Zener diode D2 is then
1N4011 diodes.
Further, the magnetic control circuit is by magnetic switch CK, FET MOS, triode VT1, resistance R1, resistance
R2, resistance R3, polar capacitor C1, polar capacitor C3, inductance L, and diode D1 are constituted.
During connection, one end of resistance R1 is connected with the grid of FET MOS, the other end and wherein the one of magnetic switch CK
End is connected.The P poles of diode D1 are connected with the emitter stage of triode VT1, and N poles are Jing after resistance R2 with FET MOS's
Source electrode is connected.The positive pole of polar capacitor C1 is connected with the base stage of triode VT1, negative pole with when base integrated chip U2
DISCHG pins are connected.One end of inductance L is connected with the colelctor electrode of triode VT1, and the other end is negative with polar capacitor C1
Pole is connected.The positive pole of polar capacitor C3 is connected with the N poles of diode D1, and negative pole is Jing after resistance R3 with FET MOS's
Drain electrode is connected.
The other end of the magnetic switch CK is connected with the colelctor electrode of triode VT1；The N poles of the diode D1 with when base
The TRIG pins of integrated chip U2 are connected；The drain electrode of the FET MOS is connected with the colelctor electrode of triode VT2 and is followed by
Ground.
Wherein, the magnetic switch CK of the circuit is that the magnetic switch being made up of open type tongue tube AG and alnico magnets ZT comes real
It is existing, wherein one end of the open type tongue tube AG stimulate the menstrual flow electrically connect with the grid of FET MOS after resistance R1, the other end and
The colelctor electrode electrical connection of triode VT1；And alnico magnets ZT is then arranged on the door-plate edge of toilet, open type tongue tube
AG is then arranged on the doorframe corresponding with alnico magnets ZT.During enforcement, when the door of toilet is to open, magnetic switch CK's
The distance of permanent magnet ZT and open type tongue tube AG becomes remote, and open type tongue tube AG is not made by the magnetic force of alnico magnets ZT
It is off-state with, the third contact in open type tongue tube AG, magnetic control circuit not output voltage；After door is closed, magnetic switch CK
The distance of permanent magnet ZT and open type tongue tube AG become near, magneticactions of the open type tongue tube AG in alnico magnets ZT
Under, the third contact closure in open type tongue tube AG makes magnetic control circuit output voltage.
In order to ensure the practical effect of the present invention, described is that FET MOS is IRFP260 FETs, three poles
Pipe VT1 is 3DG130 triodes, and resistance R1 is 18.5k Ω, and the resistance of resistance R2 is 12k Ω, and the resistance of resistance R3 is 2k Ω；Pole
Property electric capacity C1 capacitance be 0.47 μ F, the capacitance of polar capacitor C3 is 10 μ F；Inductance L is 100 μ P core inductance L；Diode D1
For 1N4008 diodes.
Yet further, the dual control circuit is by bidirectional thyristor V, resistance R10, adjustable resistance R11, photo resistance
RG, polar capacitor C7, polar capacitor C8, and diode D4 are constituted.
During connection, the N poles of diode D4 are connected with the control end of bidirectional thyristor V, and P poles are Jing after photo resistance RG with two
The A inputs of pole pipe rectifier U1 are connected.The positive pole of polar capacitor C8 is connected with the P poles of diode D4, negative pole with it is two-way
The first anode of IGCT V is connected.The negative pole of polar capacitor C7 is connected Jing after adjustable resistance R11 with the P poles of diode D4,
Positive pole is connected Jing after resistance R10 with the second plate of bidirectional thyristor V.
The positive pole of the polar capacitor C7 is collectively forming the second output of control system with the normally opened contact K-1 of relay K
End is simultaneously connected with illuminating lamp LM；The negative pole of the polar capacitor C8 is also connected with the A inputs of diode rectifier U1.Should
Dual control circuit is used to be controlled the open and close of illuminating lamp LM.
For the practical effect of the present invention, it is two-way that described bidirectional thyristor V then preferentially employs BTB06TO-220
Realizing, the resistance of resistance R10 is 51 Ω to IGCT, and the adjustable range of the resistance of adjustable resistance R11 is 1～10k Ω, photosensitive electricity
Resistance RG is CdS photo resistance, and polar capacitor C7 capacitances are 47 μ F/16V, and its capacitance for shift capacitor of polar capacitor C8 is 100 μ
F/50V；Diode D4 is the switching diode of 1N4002.
As shown in Fig. 2 the current foldback circuit is by triode VT3, triode VT4, triode VT5, triode VT6,
Triode VT7, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, resistance R17, polar capacitor C9, polar capacitor
C10, polar capacitor C11, polar capacitor C12, diode D5, and diode D6 are constituted.
During connection, the positive pole of polar capacitor C9 is connected Jing after resistance R12 with the emitter stage of triode VT4, negative pole and three
The base stage of pole pipe VT4 is connected.The P poles of diode D5 are connected with the positive pole of polar capacitor C9, the collection of N poles and triode VT3
Electrode is connected.The P poles of diode D6 are connected Jing after resistance R13 with the emitter stage of triode VT4, and N poles are with triode VT6's
Colelctor electrode is connected.One end of resistance R14 is connected with the base stage of triode VT6, the colelctor electrode phase of the other end and triode VT4
Connection.The positive pole of polar capacitor C10 is connected with the base stage of triode VT5, and negative pole is connected with the base stage of triode VT7.
Meanwhile, one end of resistance R15 is connected with the base stage of triode VT3, and the other end is connected with the base stage of triode VT7
Connect.The positive pole of polar capacitor C11 is grounded after being connected with the emitter stage of triode VT5, the emitter stage phase of negative pole and triode VT6
Connection.One end of resistance R17 is connected with the emitter stage of triode VT6, other end ground connection.One end of resistance R16 and triode
The base stage of VT3 is connected, other end ground connection.The positive pole of polar capacitor C12 is connected with the base stage of triode VT7, negative pole and three
The emitter stage of pole pipe VT7 is grounded after being connected.
The colelctor electrode of the triode VT4 is also connected with the base stage of triode VT5；The colelctor electrode of the triode VT5
It is connected with the base stage of triode VT6；The emitter stage of the triode VT6 is also connected with the colelctor electrode of triode VT7；It is described
The negative pole of polar capacitor C12 is also connected with the negative pole of polar capacitor C10；The grounded emitter of the triode VT3；The pole
Output end of the negative pole of property electric capacity C11 as current foldback circuit.
For the practical effect of the present invention, described triode VT3～VT7 effectively employs the poles of 3DG12C tri-
Pipe；The resistance of resistance R12 is 510K Ω, and the resistance of resistance R13, resistance R14 and resistance R16 is 200K Ω, the resistance of resistance R15
It is worth for 10K Ω, the resistance of resistance R17 is 2K Ω；The capacitance of polar capacitor C9 be 0.47 μ F/25V, the capacitance of polar capacitor C10
Capacitance for 0.1 μ F/400V, polar capacitor C11 and polar capacitor C12 is 220 μ F/16V；Diode D5 and diode D6 are
1N4014 diodes.
During work, when someone enters toilet, after door is closed, the permanent magnet ZT and open type tongue tube AG of magnetic switch CK
Distance become near, third contacts of the open type tongue tube AG under the magneticaction of alnico magnets ZT, in open type tongue tube AG
Closure, now FET MOS obtains bias current and turns on.After FET MOS conductings, triode VT1 must be conducted, base when making
The TRIG pins of integrated chip U2 are changed into low level, when base integrated chip U2 in triggering set, this constantly basis set into chip U2
OUT pins by original low transition be high level, relay K excitation adhesives.After relay K adhesives, its normally opened contact
K-1 is closed, ventilation fan MAC energization work, starts exhaust.At the same time, another group of normally opened contact K-2 of relay K is also closed,
Illuminating lamp LM is powered and lights, i.e., the brightness of illuminating lamp LM can be adjusted by adjusting the resistance of adjustable resistance R11.When people from
When opening bathroom door and being unlocked, the hypertelorism of the permanent magnet ZT and normally closed dry reed pipe AG of magnetic switch CK, due to third in AG
Contact causes the third contact in AG to disconnect not by the magneticaction of ZT, and triode VT1 ends without bias current, now, monostable time delay
Circuit when base integrated chip U2 TRIG pins be in high level, therefore when base integrated chip U2 be in reset state, when basis set into
The OUT pins output low level of chip U2, polar capacitor C4 starts electric discharge, enables the voltage on relay K to be kept for a period of time,
Ventilation fan MAC and illuminating lamp LM remain in that working condition；After the electric discharge of polar capacitor C4 terminates, relay K no currents pass through,
Its normally opened contact K-1 and normally opened contact K-2 disconnect, dual control circuit must not electricity, dual control circuit do not work, ventilation fan MAC and photograph
The equal dead electricity of bright lamp LM, i.e. ventilation fan MAC and illuminating lamp LM are closed.The ventilation fan MAC and illuminating lamp LM time delay works of the present invention
The time of work is determined by the capacitance of polar capacitor C4, and the capacitance of the polar capacitor C4 that the present invention is adopted can make ventilation fan
MAC and illuminating lamp LM delay workings 10 minutes；The delay working of the present invention then automatically restores to original state after terminating.
Wherein, the present invention, can be effectively in order to be able to the instant high-voltage produced in output voltage is eliminated or suppressed
The backend electronics element and load for preventing the present invention is damaged by high voltage, in the diode rectifier of the output end as the present invention
Be provided with current foldback circuit on the A inputs of U1, the circuit output voltage produce high voltage when, the electric current of triode VT6
Increase, the voltage on resistance R17 rises rapidly, i.e., the voltage on the emitter stage of triode VT7 also rises rapidly, works as triode
When the voltage of the emitter stage of VT7 rises to 0.7V, the voltage on resistance R17 is added to triode by triode VT7 saturation conductions
The base stage of VT5, turns on triode VT5, and triode VT4 cut-offs make circuit stop output current, so as to realize overcurrent protection
Effect, the backend electronics element and load that can effectively prevent the present invention is damaged by high voltage, and ensure that present invention output electricity
The stability and reliability of pressure.
If when someone enters toilet and the brightness in it bright enough, due to there is stronger light to be radiated at photosensitive electricity
On resistance RG, the internal resistance for making photo resistance RG diminishes, the undertension at polar capacitor C8 two ends so that switching diode D4 conductings, this
When bidirectional thyristor V block without trigger current, illuminating lamp LM will not be lighted.Night without sunlight due to being radiated at photo resistance
On RG, thus the internal resistance of photo resistance RG becomes very big, and equivalent to open circuit, now diode D4 conductings, bidirectional thyristor V leads
Logical, illuminating lamp H is lighted.
Open and close of the present invention by magnetic switch CK to illuminating lamp LM and ventilation fan MAC in combination with peripheral circuit are entered
Row control, and the present invention carries out voltage stabilizing process to input voltage, makes the voltage of input more stable, and the present invention is improve well
Stability, ensure that the present invention can well control illuminating lamp LM and ventilation fan MAC is automatically turned on and closing, energy
Improve the air quality of toilet well, serious have impact on the healthy of people.When base integrated chip U3 of the present invention
Preferentially employ NE555 integrated chips to realize, the chip can effectively improve the present invention to illumination in combination with peripheral circuit
Lamp LM's and ventilation fan MAC automatically turns on and the control effect closed.
As described above, just can be very good to realize the present invention.
Claims (7)
1. a kind of intelligence control system based on current foldback circuit, it is characterised in that：It is main by when base integrated chip U3, two poles
Pipe rectifier U1, triode VT2, positive pole is connected with the B inputs of diode rectifier U1, negative pole and diode rectifier U1
A inputs be collectively forming control system input polar capacitor C6, one end is connected with the positive pole of polar capacitor C6, separately
The resistance R9 that one end is connected with the negative pole of polar capacitor C6, positive pole with when base integrated chip U3 THOLD pins be connected, bear
The polar capacitor C2 that pole is connected Jing after resistance R4 with the base stage of triode VT2, one end is connected with the emitter stage of triode VT2
Connect, the other end with when base integrated chip U2 the CVOLT pins adjustable resistance R5 that are connected, one end with when base integrated chip U2
The collection of the resistance R6 that CVOLT pins are connected, the other end is connected with the colelctor electrode of triode VT2, positive pole and field triode VT2
Electrode is connected, negative pole sequentially Jing after relay K and resistance R7 with when base integrated chip U2 OUT pins be connected polarity electricity
Hold C4, N poles are connected with relay K with the tie point of resistance R7, the diode that P poles are connected with the negative pole of polar capacitor C4
D3, the current foldback circuit being connected with the A inputs of diode rectifier U1, respectively with when base integrated chip U3 VCC pipe
The three-terminal voltage-stabilizing circuit that pin is connected with the cathode output end and cathode output end of diode rectifier U1, respectively with when basis set
Into the magnetic control circuit that chip U3 is connected with the colelctor electrode of triode VT2, and it is connected with the A inputs of diode rectifier U1
The dual control circuit composition for connecing；The THOLD pins of base integrated chip U2 are connected respectively with DISCHG pins and VCC pins when described
Connect；The RESET pins of base integrated chip U2 are connected with VCC pins when described, its GND pin is grounded；The magnetic control circuit point
Not with when base integrated chip U2 THOLD pins and DIS pins and VCC pins be connected；The normally opened contact of the relay K
Wherein one end of K-2 is connected with the negative pole of polar capacitor C6, the output end of the other end and current foldback circuit is collectively forming control
First output end of system processed；Wherein one end of the normally opened contact K-1 of the relay K is connected with the negative pole of polar capacitor C6
Connect, the output end of its other end and dual control circuit is collectively forming the second output end of control system.
2. a kind of intelligence control system based on current foldback circuit according to claim 1, it is characterised in that the mistake
, by triode VT3, triode VT4, triode VT5, triode VT6, triode VT7, positive pole is Jing after resistance R12 for stream protection circuit
Be connected with the emitter stage of triode VT4, the polar capacitor C9 that negative pole is connected with the base stage of triode VT4, P poles and polarity electricity
Hold C9 positive pole be connected, the diode D5 that N poles are connected with the colelctor electrode of triode VT3, P poles Jing after resistance R13 with three poles
The diode D6 that the emitter stage of pipe VT4 is connected, N poles are connected with the colelctor electrode of triode VT6, one end is with triode VT6's
The resistance R14 that base stage is connected, the other end is connected with the colelctor electrode of triode VT4, positive pole is connected with the base stage of triode VT5
Connect, the polar capacitor C10 that negative pole is connected with the base stage of triode VT7, one end is connected with the base stage of triode VT3, another
The resistance R15 that is connected with the base stage of triode VT7 of end, positive pole is grounded after being connected with the emitter stage of triode VT5, negative pole and
The polar capacitor C11 that the emitter stage of triode VT6 is connected, one end is connected with the emitter stage of triode VT6, other end ground connection
Resistance R17, one end is connected with the base stage of triode VT3, the resistance R16 of other end ground connection, and positive pole and triode VT7
Base stage be connected, negative pole be connected with the emitter stage of triode VT7 after be grounded polar capacitor C12 composition；The triode
The colelctor electrode of VT4 is also connected with the base stage of triode VT5；The colelctor electrode of the triode VT5 and the base stage phase of triode VT6
Connection；The emitter stage of the triode VT6 is also connected with the colelctor electrode of triode VT7；The negative pole of the polar capacitor C12 is also
It is connected with the negative pole of polar capacitor C10；The grounded emitter of the triode VT3；The negative pole conduct of the polar capacitor C11
The output end of current foldback circuit.
3. a kind of intelligence control system based on current foldback circuit according to claim 2, it is characterised in that described three
End mu balanced circuit by voltage stabilizing chip U3, negative pole is connected with the GND pins of voltage stabilizing chip U2, positive pole Jing after resistance R8 with voltage stabilizing core
The polar capacitor C5 that the VDD pins of piece U2 are connected, and N poles be connected with the OUT pins of voltage stabilizing chip U2, P poles and polarity
The Zener diode D2 compositions that the negative pole of electric capacity C5 is connected；The N poles of the Zener diode D2 with when base integrated chip U3
VCC pins are connected；The negative pole of the polar capacitor C5 is grounded after being connected with the cathode output end of diode rectifier U1；Institute
The VDD pins for stating voltage stabilizing chip U2 are connected with the cathode output end of diode rectifier U1.
4. a kind of intelligence control system based on current foldback circuit according to claim 3, it is characterised in that the magnetic
Control circuit by magnetic switch CK, FET MOS, triode VT1, one end is connected with the grid of FET MOS, the other end and
The resistance R1 that wherein one end of magnetic switch CK is connected, P poles are connected with the emitter stage of triode VT1, N poles Jing after resistance R2 with
The diode D1 that the source electrode of FET MOS is connected, positive pole is connected with the base stage of triode VT1, negative pole and when basis set into
The polar capacitor C1 that the DISCHG pins of chip U2 are connected, one end is connected with the colelctor electrode of triode VT1, the other end and pole
The inductance L that the negative pole of property electric capacity C1 is connected, and positive pole be connected with the N poles of diode D1, negative pole Jing after resistance R3 with field
The polar capacitor C3 compositions that the drain electrode of effect pipe MOS is connected；The other end of the magnetic switch CK and the colelctor electrode of triode VT1
It is connected；The N poles of the diode D1 with when base integrated chip U2 TRIG pins be connected；The leakage of the FET MOS
Pole is grounded after being connected with the colelctor electrode of triode VT2.
5. a kind of intelligence control system based on current foldback circuit according to claim 4, it is characterised in that described double
Control circuit by bidirectional thyristor V, N poles are connected with the control end of bidirectional thyristor V, P poles Jing after photo resistance RG with diode
The diode D4 that the A inputs of rectifier U1 are connected, positive pole is connected with the P poles of diode D4, negative pole and bidirectional thyristor V
The polar capacitor C8 that is connected of the first anode, and negative pole is connected, just Jing after adjustable resistance R11 with the P poles of diode D4
The polar capacitor C7 compositions that pole is connected Jing after resistance R10 with the second plate of bidirectional thyristor V；The polar capacitor C7 is just
Pole is collectively forming the second output end of control system with the normally opened contact K-1 of relay K；The negative pole of the polar capacitor C8 also with
The A inputs of diode rectifier U1 are connected.
6. a kind of intelligence control system based on current foldback circuit according to claim 5, it is characterised in that the magnetic
Switch CK is the magnetic switch being made up of open type tongue tube AG and alnico magnets ZT；Wherein the one of the open type tongue tube AG
End is connected with Jing after resistance R1 with the grid of FET MOS, the other end is connected with the colelctor electrode of triode VT1.
7. a kind of intelligence control system based on current foldback circuit according to claim 6, it is characterised in that described steady
Pressure chip U2 is W7800 integrated chips；Base integrated chip U3 is NE555 integrated chips when described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610890206.5A CN106655100A (en) | 2016-10-12 | 2016-10-12 | Intelligent control system based on over current protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610890206.5A CN106655100A (en) | 2016-10-12 | 2016-10-12 | Intelligent control system based on over current protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106655100A true CN106655100A (en) | 2017-05-10 |
Family
ID=58856729
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610890206.5A Pending CN106655100A (en) | 2016-10-12 | 2016-10-12 | Intelligent control system based on over current protection circuit |
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| Country | Link |
|---|---|
| CN (1) | CN106655100A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202748621U (en) * | 2012-08-29 | 2013-02-20 | 商丘市电业局永城分局 | Machine room central ventilation system open-close door automatic control device |
| CN105578645A (en) * | 2015-12-20 | 2016-05-11 | 合肥艾斯克光电科技有限责任公司 | Over-current protection method of LED driving power supply |
| CN205356748U (en) * | 2016-01-25 | 2016-06-29 | 吕香玲 | Overcurrent protection lamps and lanterns |
-
2016
- 2016-10-12 CN CN201610890206.5A patent/CN106655100A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202748621U (en) * | 2012-08-29 | 2013-02-20 | 商丘市电业局永城分局 | Machine room central ventilation system open-close door automatic control device |
| CN105578645A (en) * | 2015-12-20 | 2016-05-11 | 合肥艾斯克光电科技有限责任公司 | Over-current protection method of LED driving power supply |
| CN205356748U (en) * | 2016-01-25 | 2016-06-29 | 吕香玲 | Overcurrent protection lamps and lanterns |
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