CN109991916A - A kind of general PLC control system for ring network cabinet motor control - Google Patents
A kind of general PLC control system for ring network cabinet motor control Download PDFInfo
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- CN109991916A CN109991916A CN201910230074.7A CN201910230074A CN109991916A CN 109991916 A CN109991916 A CN 109991916A CN 201910230074 A CN201910230074 A CN 201910230074A CN 109991916 A CN109991916 A CN 109991916A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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- Automation & Control Theory (AREA)
- Control Of Electric Motors In General (AREA)
- Programmable Controllers (AREA)
Abstract
The invention discloses a kind of general PLC control system for ring network cabinet motor control, including a control assembly and switch detection circuit, control assembly includes a processor, pwm control circuit, fault detection circuit, circuit for controlling motor；Switch detection circuit is also connect with processor, switchs detection signal to detection circuit to send；Fault detection circuit includes current divider, linear optical coupling and converter, current divider is connected between the node being connected in H-bridge drive circuit with external motor and external motor, one end of current divider opposite outer motor is connected to the input terminal of linear optical coupling, the output end of linear optical coupling is connected to converter, converter is also connect with processor, to send the fault-signal after AD conversion to processor, processor, pwm control circuit, fault detection circuit, circuit for controlling motor, switch detection circuit are integrated in PLC control box.The present invention can unified circuitry arrangement, reduce ring network cabinet circuit maintenance difficulty, increase versatility.
Description
Technical field
The present invention relates to ring network cabinet control technology field, specially a kind of general PLC for ring network cabinet motor control is controlled
System processed.
Background technique
With the development of economy with the progress of technology, city net in using cableization power supply have become power distribution network development certainty
Trend.It is powered from cableization to consider, ring network power supply becomes the preferred shape of cable distribution with its economy and reliability
Formula.The development of urban distribution network makes the form of ring network power supply account for increasing ratio in customer power supply scheme, and as looped network
The main equipment of power supply --- ring network cabinet, the then attention increasingly by power supply department and user.Power office's power distribution network uses looped network
Cabinet has more than 20 years history, and ring network cabinet is continuously improved therebetween, is kept updating.
Currently, operation it is most reliable be import ring network cabinet, as Beijing power distribution network largely uses the SF6 of Siemens, F & G
Ring network cabinet, Guangzhou, Shenzhen, Zhuhai, zhejiang and other places area largely use the SM6, the Uniswith of RM6 ring network cabinet and ABB, RGC of MG
Type SF6 ring network cabinet is all the good example that import ring network cabinet is promoted the use of.Simultaneously recently as the life of domestic many building and repair plants
It produces ability level to be substantially improved, the ring network cabinet of production domesticization is also largely used.
Existing ring network cabinet, which passes through mostly after discrete component carries out its damage, to be difficult to search abort situation, it is necessary to which investment is more
More human activities search problem, and then in a disguised form increase maintenance difficulty, and between different ring network cabinets discrete component cloth
It sets that mode is also different, is at this time even more the difficulty for increasing maintenance.
Summary of the invention
It is a kind of for the logical of ring network cabinet motor control in view of the deficiencies of the prior art, the present invention intends to provide
With PLC control system, the maintenance difficulty of ring network cabinet circuit can reduce, increase versatility.
To achieve the above object, the present invention provides the following technical scheme that it is a kind of for the general of ring network cabinet motor control
PLC control system, including a control assembly and switch detection circuit, the control assembly include a processor, PWM control electricity
Road, fault detection circuit, circuit for controlling motor；The pwm control circuit is connect with processor, to obtain pwm signal, also with electricity
Machine control circuit connection, to export modulated signal to circuit for controlling motor；The fault detection circuit and circuit for controlling motor connect
It connects, is also connect with processor, to detect the fault message of circuit for controlling motor and feed back to processor；The switch detection circuit
It is also connect with processor, switchs detection signal to detection circuit to send；The circuit for controlling motor includes four N-channels
Metal-oxide-semiconductor, four metal-oxide-semiconductors constitute H-bridge drive circuit, wherein the grid of metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4
It is connect with pwm control circuit, the node being connected in the H-bridge drive circuit with external motor is additionally coupled to fault detection electricity
Road, the fault detection circuit include current divider, linear optical coupling and converter, and the current divider is connected to H-bridge drive circuit
In between the node being connected with external motor and external motor, one end of the current divider opposite outer motor is connected to linear light
The input terminal of coupling, the output end of the linear optical coupling are connected to converter, and the converter is also connect with processor, with hair
Fault-signal after sending AD conversion is to processor, the processor, pwm control circuit, fault detection circuit, motor control electricity
Road, switch detection circuit are integrated in PLC control box.
As a further improvement of the present invention, sample circuit is provided between the linear optical coupling and current divider, it is described to adopt
Sample circuit includes amplifier U1, and the output end of the amplifier U1, which is connected with to be connected to after current-limiting resistance inside linear optical coupling, shines two
Pole pipe anode, the inverting input terminal of the amplifier U1 also pass through a capacitance connection to its output end, and the reverse phase of the amplifier U1 is defeated
Enter one end that end is also connected to current divider opposite outer motor by a resistance；The positive input end grounding of the amplifier U1, institute
The cathode ground connection of the light emitting diode inside linear optical coupling is stated, the anode of internal feedback photodiode is connected to amplifier U1
Inverting input terminal, cathode ground connection；The plus earth of output photodiode inside the linear optical coupling, cathode connection
There is an amplifier U2, the positive input end grounding of the amplifier U2, inverting input terminal is connected to its output end by a resistance, described
The output end of amplifier U2 is connected to converter.
As a further improvement of the present invention, it is additionally provided on the route that the H-bridge drive circuit is connect with external motor
Relay, the relay between external motor and H-bridge drive circuit, with control H-bridge drive circuit and external motor it
Between conducting and disconnection, the control terminal of the relay is connected to processor, after relay closure, H-bridge drive circuit control
External motor rotation.
As a further improvement of the present invention, three poles are additionally provided between the control terminal connection and processor of the relay
Pipe Q1 and with door Q2, the collector of the triode Q1 is connected to power supply by a resistance, and emitter is connected to door Q2's
One of input terminal, a pin is connected to the base stage of triode Q1 in the processor, and there are one pins to connect
To another input terminal with door Q2, the control terminal that relay is connected to door Q2 output end.
As a further improvement of the present invention, the processor is also connected with host computer telecommunication circuit, and the host computer is logical
Believe that circuit uses RS485 telecommunication circuit, the RS485 telecommunication circuit and host computer communicate to connect, with real-time Transmission external motor
Working condition and real-time Transmission fault threshold set information to processor.
As a further improvement of the present invention, it is additionally provided in the PLC control box for the access of external switch amount signal
Light-coupled isolation component, the light-coupled isolation component are multiple groups optical coupling isolation circuit, and every group of optical coupling isolation circuit detects inductive switch
A switching value in circuit, the optical coupling isolation circuit are connected to switch detection circuit.
As a further improvement of the present invention, the PLC control box has several matched connecting terminals and connector lug, institute
Connector lug is stated for connecting with outer lead, fitting groove compatible with connector lug, the dress are offered on the connecting terminal
The slot bottom of slot allocation is provided with rebound self-locking device, offers on the connector lug compatible embedding with the folder on rebound self-locking device
Slot, when connector lug is inserted into fitting groove and squeezes rebound self-locking device, folder is embedded in caulking groove clamping connector lug, the wiring
Head carries out signal transmission by contact and connecting terminal.
As a further improvement of the present invention, spherical groove, the spherical groove are also provided on the cell wall of the fitting groove
Interior rotatable embedded with sliding pearl, spherical groove is exposed in the sliding pearl part, and the inside of spherical groove is additionally provided with spring, the bullet
One end of spring and sliding pearl are inconsistent, and the slot bottom of the other end and spherical groove is inconsistent, when connector lug plugging in fitting slot, Hua Zhuyu
The side of connector lug is inconsistent.
As a further improvement of the present invention, it is provided with LED light in the folder, is provided with to be connected in the caulking groove and connects
The first conductive sheet on the end of a thread for the contact of ground connection, the folder are provided with the second conductive sheet with respect to one end of caulking groove, the LED
The anode of lamp and the contact that offer power supply on connecting terminal is connected to by conducting wire, cathode are connected to the second conduction on folder
Piece, the contact being grounded on first conductive sheet and connector lug are connect, in folder insertion caulking groove and connector lug and terminals
When son successfully passes contact connection, the first conductive sheet and the second conductive sheet are inconsistent, and LED light is lighted.
As a further improvement of the present invention, the folder is guide-lighting material, and when LED light is lighted, folder is by the light of LED
It is oriented to fitting groove notch.
Beneficial effects of the present invention, when carrying out the assembly of old ring network cabinet, user only needs to tear relevant discrete component open
Under, it is only necessary to retain the route of switching signal transmitting, by the connection to switch detection circuit, processor can be connect at this time
By corresponding signal and relevant operation is executed, this connection type is simple and convenient, and uses unified circuit arrangement, in addition exists
It can be directly replaced in original ring network cabinet, new and old ring network cabinet general can improve, and not need specific aim modification；And
And go wrong in time, unified layout is used in the PLC control box of this programme, convenient for searching problem and repairing.
Detailed description of the invention
Fig. 1 is circuit overall structure diagram of the invention；
Fig. 2 is fault detection circuit structural schematic diagram of the invention；
Fig. 3 is that rebound self-locking device and connector lug of the invention cooperate schematic diagram；
Fig. 4 is connector lug and connecting terminal mating part perspective structure schematic diagram of the invention.
Drawing reference numeral: 1, control assembly；11, processor；12, pwm control circuit；13, circuit for controlling motor；14, failure
Detection circuit；141, current divider；142, linear optical coupling；143, converter；2, switch detection circuit；3, connector lug；31, embedding
Slot；4, connecting terminal；41, fitting groove；42, spherical groove；43, sliding pearl；44, spring；5, rebound self-locking device；51, folder；52,
LED light；61, the first conductive sheet；62, the second conductive sheet；7, relay；8, host computer telecommunication circuit.
Specific embodiment
The present invention is described in further detail below in conjunction with embodiment given by attached drawing.
Referring to Fig.1 shown in -4, a kind of general PLC control system for ring network cabinet motor control of the present embodiment, including
One control assembly 1 and switch detection circuit 2, the control assembly 1 include a processor 11, pwm control circuit 12, fault detection
Circuit 14, circuit for controlling motor 13；The pwm control circuit 12 is connect with processor 11, to obtain pwm signal, and also and motor
Control circuit 13 connects, to export modulated signal to circuit for controlling motor 13；The fault detection circuit 14 and motor control electricity
Road 13 connects, and also connect with processor 11, to detect the fault message of circuit for controlling motor 13 and feed back to processor 11；It is described
Switch detection circuit 2 is also connect with processor 11, switchs detection signal to detection circuit to send；The circuit for controlling motor 13
Metal-oxide-semiconductor including four N-channels, four metal-oxide-semiconductors constitute H-bridge drive circuit, wherein metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor
Q3, metal-oxide-semiconductor Q4 grid connect with pwm control circuit 12, the node being connected in the H-bridge drive circuit with external motor is also
It is connected to fault detection circuit 14, the fault detection circuit 14 includes current divider 141, linear optical coupling 142 and converter
143, the current divider 141 is connected between the node being connected in H-bridge drive circuit with external motor and external motor, and described point
One end of stream 141 opposite outer motor of device is connected to the input terminal of linear optical coupling 142, and the output end of the linear optical coupling 142 connects
It is connected to converter 143, the converter 143 is also connect with processor 11, to send the fault-signal after AD conversion to place
Manage device 11, the processor 11, pwm control circuit 12, fault detection circuit 14, circuit for controlling motor 13, switch detection circuit 2
It is integrated in PLC control box.
Firstly, external function circuit is attached with switch detection circuit 2, circumferential work is received by switch detection circuit 2
The switching signal of energy electronic feedback, and processor 11 is fed back to, the switch letter of each functional circuit is received by processor 11
Number, the indicator light being arranged in box is controlled to indicate the working condition of corresponding function circuit by control PLC, and then reach to each
Peripheral circuit working condition accurately controls.In addition, processor 11 should when receiving the switching signal of corresponding motor control
Switching signal is converted to corresponding pwm signal and is sent to pwm control circuit 12, by pwm control circuit 12 to motor control
Circuit 13 is controlled, and then the velocity of rotation for controlling external motor and rotation are reversely, such as: the switch that processor 11 receives
Signal is to close a floodgate with regard to a distant place, then processor 11 sends the corresponding quick pwm signal rotated forward to pwm control circuit 12, passes through PWM
Control circuit 12 controls external motor.In addition, fault detection circuit 14 can be external during external motor rotation
Portion's motor is detected, and when the case where stall occurs in external motor, electric current be will increase on the route of motor, is easy for burning at this time
Motor is ruined, the electric current on the route of motor is detected by fault detection circuit 14, and be sent to processor 11, passes through place
It manages device 11 to stop sending pwm signal, and then interrupts the control of external motor, in the process, current divider 141 can connect motor
The electric current in circuit connect is sampled, and is sampled by forming faint voltage at 141 both ends of current divider to electric current, energy
Safety is enough improved, in addition the voltage also passes through linear optical coupling 142 and transmitted, and should pass through linear optical coupling 142 can be by voltage
Signal is isolated, and avoids current divider 141 in operation irregularity, and high current and/or big voltage enter coupled other
Circuit causes irreversible injury to these circuits, is isolated by linear optical coupling 142, can not only keep analog signal
Transmitting, while can also be isolated, it is ensured that the stability and safety of the work of circuit, while there is extraordinary protection
Effect.Hereafter, digital signal is converted into being AD converted of exporting of linear optical coupling 142 by converter 143 and is sent to place
Manage device 11, processor 11 receive after corresponding signal can the stall failure to motor judge, such as in processor 11
Interior default stall judgment threshold, the data information carried after motor rotation blockage by the signal that AD conversion feeds back to processor 11
More than stall judgment threshold, it is judged as stall at this time, processor 11 stops sending pwm signal to pwm control circuit 12, and passes through
Indicator light or wireless communication signals remind related personnel, and then reach the protection to motor.And pass through all circuits
It is integrated in PLC control box, raising is integrated, and the route for needing to arrange is less, is easy for installation and maintenance, it is only necessary to examine switch
Slowdown monitoring circuit 2 is attached by connection jaws and external function circuit.Existing ring network cabinet uses discrete component to carry out completely
Arrangement, it is just extremely difficult when thering is component to go wrong to repair, it needs to detect each discrete component one by one, and
The circuit arrangement of this kind of ring network cabinet is all different, cause maintenance mode can only specific aim maintenance, it is unified that versatility can not be carried out
Maintenance, so that maintenance personal corresponds to different ring network cabinet models and requires different repair methods, so that repairing very difficult；It is logical
This programme is crossed, user only needs to remove relevant discrete component, it is only necessary to retain the route of switching signal transmitting, it will
The connection is to switch detection circuit 2, and processor 11 can receive corresponding signal and execute relevant operation at this time, this connection
Mode is simple and convenient, and uses unified circuit arrangement, in addition can directly be replaced in original ring network cabinet, new and old
Ring network cabinet general can improve, and not need specific aim modification；And it goes wrong in time, in the PLC control box of this programme
Using unified layout, convenient for searching problem and repairing.And in the case where the damage of existing ring network cabinet, maintenance personal is carried out
When searching problem and repairing, directly the circuit in existing ring network cabinet can be removed, by the PLC of this programme control it is box-packed enter,
Installation and upgrade is can be completed into external switching value route access, can directly accelerate maintenance personal and old ring network cabinet is carried out
Maintenance.In time using the ring network cabinet of this programme when breaking down, also only need directly to remove the PLC control box of this programme,
In addition the PLC for accessing a normal work controls box, and it is bad to substantially reduce current ring network cabinet maintenance work bring
It influences, the scene of avoiding lacks the quagmire of the secondary personnel of profession, and PLC controls box and can repair additionally by professional is unified
?.
As an improved specific embodiment, sampling electricity is provided between the linear optical coupling 142 and current divider 141
Road, the sample circuit include amplifier U1, and the output end of the amplifier U1 is connected to linear optical coupling 142 after being connected with current-limiting resistance
Internal light emitting diode anode, the inverting input terminal of the amplifier U1 also pass through a capacitance connection to its output end, the fortune
The inverting input terminal for putting U1 also passes through one end that a resistance is connected to 141 opposite outer motor of current divider；The amplifier U1 is just
Phase input end grounding, the cathode ground connection of the light emitting diode inside the linear optical coupling 142, internal feedback photodiode
Anode be connected to the inverting input terminal of amplifier U1, cathode ground connection；Output photodiode inside the linear optical coupling 142
Plus earth, cathode is connected with an amplifier U2, and the positive input end grounding of the amplifier U2, inverting input terminal passes through an electricity
Resistance is connected to its output end, and the output end of the amplifier U2 is connected to converter 143.
Through the above technical solutions, the voltage formed on current divider 141 is by entering the anti-of amplifier U1 after resistance current limliting
Phase input terminal, amplifier U1 cooperates the light emitting diode inside linear optical coupling 142 at this time, by voltage signal by being converted into electric current letter
Number, and sent by way of light, wherein the resistance between linear optical coupling 142 and light emitting diode being capable of linear adjustment
The brightness of light emitting diode in optocoupler 142 can adapt to more circuit requirements while protecting the light emitting diode.Its
Signal can be isolated and be filtered by the capacitor between middle amplifier U1 output end and inverting input terminal, wherein feeding back photosensitive two pole
Pipe carries out negative-feedback, enhances control effect；Cooperate amplifier U2 by output photodiode, current signal can be converted into electricity
Signal is pressed, and is exported by amplifier U2 to converter 143, converter 143 can be using AD mature on the market
Module.By the sample circuit, the transmitting of signal being capable of more accurate stable.
As an improved specific embodiment, also set up on the route that the H-bridge drive circuit is connect with external motor
There is relay 7, the relay 7 is between external motor and H-bridge drive circuit, to control H-bridge drive circuit and external electrical
The control terminal of conducting and disconnection between machine, the relay 7 is connected to processor, after relay 7 is closed, H bridge driving electricity
Road controls external motor rotation.
Through the above technical solutions, can first control relay 7 first when processor carries out rotation control to external motor
Conducting, hereafter again controls the rotation of motor by H-bridge drive circuit, by setting relay 7 as motor-driven
Switch can to avoid signal it is wrong in the case where H-bridge drive circuit control motor rotation, such as signal jitter.In addition in stopping pair
When the control of motor, processor first stops output pwm signal, and H-bridge drive circuit stops controlling signal to output at this time, at this time again
Relay 7 is disconnected, the control of stopping that can be more orderly to motor exports control signal additionally by H-bridge drive circuit
Positive counterelectrode can control the rotation direction of motor, while can also carry out emergency brake control to motor, to the control ability of motor
More preferably.
As an improved specific embodiment, it is additionally provided between the control terminal connection of the relay 7 and processor
Triode Q1 and with door Q2, the collector of the triode Q1 is connected to power supply by a resistance, and emitter is connected to and door
One of input terminal of Q2, a pin is connected to the base stage of triode Q1 in the processor, and there are one pins
It is connected with another input terminal being connected to after phase inverter Q3 with door Q2, the input terminal of the phase inverter Q3 connect defeated with processor
Outlet is connect with door Q2, the control terminal that relay 7 is connected to door Q2 output end.
Through the above technical solutions, each I/O pin of processor is easy unified jump as height when the moment that circuit powers on
Level or low level are easy for causing 7 maloperation of relay, setting at this time and door Q2, it is necessary to two input terminals with door
Signal is identical just to control the conducting of relay 7, can play certain time-lag action at this time, the level in the reference time delay
Jump will be filtered, which tentatively improves the accuracy of the control of relay 7, while powering on, if processor draws
The unified jump of foot is high level, at this point, entering by phase inverter Q3 with the signal of door Q2 is low level, by controlling triode
It is high level that Q1 conducting, which is passed to the level of door Q2, at this time can be to avoid the maloperation of relay 7；When the pin of processor is united
One jump be low level when, at this point, by phase inverter Q3 pass to the signal of door Q2 be high level, and with the door Q2 other end
Triode Q1 is not turned on, and the end is low level at this time, and then avoids 7 maloperation of relay, while so set, can be avoided
The maloperation of relay 7 is brought while powering on, and improves the safety of circuit and the stability of motor control at this time.
As an improved specific embodiment, the processor is also connected with host computer telecommunication circuit 8, the host computer
Telecommunication circuit 8 uses RS485 telecommunication circuit, and the RS485 telecommunication circuit and host computer communicate to connect, with real-time Transmission external electrical
The working condition and real-time Transmission fault threshold set information of machine are to processor.
Through the above technical solutions, communicated by RS485 telecommunication circuit with host computer, user can be at acquisition in real time
The data that reason device is monitored each circuit, and can directly by the current threshold of host computer feeder motor stall and block up
Turn time limit guard time etc., can be adjusted according to required.
As an improved specific embodiment, it is additionally provided in the PLC control box and is accessed for external switch amount signal
Light-coupled isolation component, the light-coupled isolation component be multiple groups optical coupling isolation circuit, every group of optical coupling isolation circuit to inductive switch examine
A switching value in slowdown monitoring circuit, the optical coupling isolation circuit are connected to switch detection circuit.
Through the above technical solutions, wherein light-coupled isolation component can use optical coupling module, external is opened by optocoupler
Pass amount and processor are isolated, and can further increase the safety of circuit, processor is allowed to be isolated with outside, are avoided outer
The portion's amount of opening the light electric voltage exception or user the wrong route when installing PLC control box cause the route of external high voltage access and
It damages PLC and controls box, the protection of height is carried out to processor.
As an improved specific embodiment, the PLC control box has several matched connecting terminals 4 and connector lug
3, the connector lug 3 offers fitting groove compatible with connector lug 3 for connecting with outer lead on the connecting terminal 4
41, the slot bottom of the fitting groove 41 is provided with rebound self-locking device 5, offers on the connector lug 3 and the folder on rebound self-locking device 5
The compatible caulking groove 31 of part 51, when connector lug 3 is inserted into fitting groove 41 and squeezes rebound self-locking device 5, folder 51 is embedded in
31 clamping connector lug 3 of caulking groove, the connector lug 3 carry out signal transmission by contact and connecting terminal 4.
Through the above technical solutions, when the route of external transmitting switching signal and PLC control box are attached by user,
First connector lug 3 can be connected on the conducting wire of outside line, convenient for using later, connector lug 3 and the connection of conducting wire can lead to
The connection type for crossing network wire crystal joint carries out crimping and punctures connection, and connector is inserted into fitting groove 41, connects at this time by user
Connector can squeeze rebound self-locking device 5, and by rebounding, self-locking device 5 drives corresponding folder 51 to be embedded into caulking groove 31, docks the end of a thread 3
Clamping is fixed and locks, and then docks the end of a thread 3 and is fixed, avoids its abjection.The fastener of existing network wire crystal joint is non-
Often it is easy to be broken off, use process will accidentally be damaged, and just connect after damage unstable, it causes using difficulty, and
And the fastener is arranged on crystal head, fastener is exposed outside after cable extraction, is easy by damage.It will in this programme
The phenomenon that self-locking device 5 that rebounds is arranged in fitting groove 41, avoids damage；When user needs to connect, continue to say
Connector lug 3 presses in fitting groove 41, and triggering rebound self-locking device 5, rebound self-locking device 5 dock the end of a thread 3 and be unlocked again at this time,
And certain elastic force pop-up connector lug 3 is provided, the disassembly of docking the end of a thread 3 provides certain power-assisted.
As an improved specific embodiment, spherical groove 42, the ball are also provided on the cell wall of the fitting groove 41
Rotatably embedded with sliding pearl 43 in connected in star 42, spherical groove 42 is exposed in sliding 43 part of pearl, goes back in the spherical groove 42
It is provided with spring 44, one end of the spring 44 and sliding pearl 43 are inconsistent, and the slot bottom of the other end and spherical groove 42 is inconsistent, when
When 3 plugging in fitting slot 41 of connector lug, sliding pearl 43 and the side of connector lug 3 are inconsistent.
Through the above technical solutions, pearl 43 sliding first can be with connector lug 3 when connector lug 3 is inserted into fitting groove 41
Side wall is contradicted, and can be fitted tightly on the side wall of connector lug 3 by spring 44, such setting can reduce connector lug 3 with
Friction between fitting groove 41 makes connection more convenient, and can pile the multipair sliding pearl 43 of setting, can allow and reduce friction
Effect is more preferable.
As an improved specific embodiment, it is provided with LED light 52 in the folder 51, is provided in the caulking groove 31
It is connected to the first conductive sheet 61 on connector lug 3 for the contact of ground connection, one end of the opposite caulking groove 31 of the folder 51 is provided with
Second conductive sheet 62, the anode of the LED light 52 and the contact that offer power supply on connecting terminal 4 is connected to by conducting wire, cathode connect
The contact being grounded on the second conductive sheet 62 being connected on folder 51, first conductive sheet 61 and connector lug 3 is connect, when folder 51
In insertion caulking groove 31 and when connector lug 3 successfully passes contact with connecting terminal 4 and connect, the first conductive sheet 61 and the second conductive sheet
62 is inconsistent, and LED light 52 is lighted.
Through the above technical solutions, folder 51 is embedded into caulking groove 31, at this time LED light in 51 clamping connector lug 3 of folder
By providing power supply on the first conductive sheet 61, the second conductive sheet 62, the contact and connecting terminal 4 that are grounded on connector lug 3 on 52
Contact constitute circuit so that folder 51 dock the end of a thread 3 be successfully fixed when, LED light 52, which is lighted, to be indicated, prompt use
Family is normally fixed, and otherwise user needs to re-connect, is avoided failing during the connection process, is led to subsequent bad connection
There is signal transmitting error.
As a further improvement of the present invention, the folder 51 is guide-lighting material, and when LED light 52 is lighted, folder 51 will
41 notch of light directing fitting groove of LED.The light of LED can be allowed to be easier to observe for user.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of general PLC control system for ring network cabinet motor control, including a control assembly (1) and switch detection circuit
(2), which is characterized in that the control assembly (1) includes a processor (11), pwm control circuit (12), fault detection circuit
(14), circuit for controlling motor (13)；The pwm control circuit (12) connect with processor (11), to obtain pwm signal, also with
Circuit for controlling motor (13) connection, gives circuit for controlling motor (13) to export modulated signal；The fault detection circuit (14) with
Circuit for controlling motor (13) connection, also connect with processor (11), to detect the fault message of circuit for controlling motor (13) and anti-
It feeds processor (11)；The switch detection circuit (2) also connect with processor (11), switchs detection signal to detection to send
Circuit；The circuit for controlling motor (13) includes the metal-oxide-semiconductor of four N-channels, and four metal-oxide-semiconductors constitute H-bridge drive circuit,
Middle metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, metal-oxide-semiconductor Q4 grid connect with pwm control circuit (12), H bridge driving electricity
The connected node of Lu Zhongyu external motor is additionally coupled to fault detection circuit (14), and the fault detection circuit (14) includes shunting
Device (141), linear optical coupling (142) and converter (143), the current divider (141) are connected in H-bridge drive circuit and outside
Between the connected node of motor and external motor, one end of current divider (141) the opposite outer motor is connected to linear optical coupling
(142) output end of input terminal, the linear optical coupling (142) is connected to converter (143), the converter (143)
It also connect with processor (11), is given processor (11) with sending the fault-signal after AD conversion, the processor (11), PWM control
Circuit (12) processed, fault detection circuit (14), circuit for controlling motor (13), switch detection circuit (2) are integrated in PLC control
In box.
2. the general PLC control system according to claim 1 for ring network cabinet motor control, which is characterized in that described
Sample circuit is provided between linear optical coupling (142) and current divider (141), the sample circuit includes amplifier U1, the amplifier
The output end of U1 is connected to the internal light emitting diode anode of linear optical coupling (142), the amplifier U1 after being connected with current-limiting resistance
Inverting input terminal also pass through a capacitance connection to its output end, the inverting input terminal of the amplifier U1 also passes through resistance connection
To one end of current divider (141) opposite outer motor；The positive input end grounding of the amplifier U1, the linear optical coupling (142)
The cathode ground connection of internal light emitting diode, the anode of internal feedback photodiode are connected to the anti-phase input of amplifier U1
End, cathode ground connection；The plus earth of the internal output photodiode of the linear optical coupling (142), cathode are connected with one
Amplifier U2, the positive input end grounding of the amplifier U2, inverting input terminal are connected to its output end, the amplifier by a resistance
The output end of U2 is connected to converter (143).
3. the general PLC control system according to claim 1 for ring network cabinet motor control, which is characterized in that the H
Be additionally provided on the route that bridge driving circuit is connect with external motor relay (7), the relay (7) be located at external motor and
Between H-bridge drive circuit, to control the conducting and disconnection between H-bridge drive circuit and external motor, the control of the relay (7)
End processed is connected to processor, and after relay (7) closure, H-bridge drive circuit controls external motor rotation.
4. the general PLC control system according to claim 3 for ring network cabinet motor control, which is characterized in that described
The control terminal of relay (7) connect be additionally provided between processor triode Q1 and with door Q2, the current collection of the triode Q1
Pole is connected to power supply by a resistance, and emitter is connected to one of input terminal with door Q2, one in the processor
A pin is connected to the base stage of triode Q1, there are one pin be connected be connected to after phase inverter Q3 with door Q2 another
Input terminal, the input terminal of the phase inverter Q3 connect output end with processor and connect with door Q2, the output end with door Q2
It is connected to the control terminal of relay (7).
5. the general PLC control system according to claim 1 for ring network cabinet motor control, which is characterized in that described
Processor is also connected with host computer telecommunication circuit (8), and the host computer telecommunication circuit (8) uses RS485 telecommunication circuit, described
RS485 telecommunication circuit and host computer communicate to connect, with the working condition of real-time Transmission external motor and real-time Transmission failure threshold
It is worth set information to processor.
6. the general PLC control system according to claim 1 for ring network cabinet motor control, which is characterized in that described
The light-coupled isolation component for the access of external switch amount signal is additionally provided in PLC control box, the light-coupled isolation component is multiple groups
Optical coupling isolation circuit, every group of optical coupling isolation circuit correspond to a switching value in switch detection circuit, the optical coupling isolation circuit
It is connected to switch detection circuit.
7. the general PLC control system according to claim 1 for ring network cabinet motor control, which is characterized in that described
PLC, which controls box, has several matched connecting terminals (4) and connector lug (3), and the connector lug (3) is used to connect with outer lead
It connects, is offered on the connecting terminal (4) and connector lug (3) compatible fitting groove (41), the slot bottom of the fitting groove (41)
It is provided with rebound self-locking device (5), is offered on the connector lug (3) compatible with the folder (51) in rebound self-locking device (5)
Caulking groove (31), when connector lug (3) is inserted into fitting groove (41) and squeezes rebound self-locking device (5), folder (51) insertion is embedding
Slot (31) clamping connector lug (3), the connector lug (3) carry out signal transmission by contact and connecting terminal (4).
8. the general PLC control system according to claim 7 for ring network cabinet motor control, which is characterized in that described
It is also provided on the cell wall of fitting groove (41) spherical groove (42), is rotatably embedded with sliding pearl (43) in the spherical groove (42),
Spherical groove (42) are exposed in sliding pearl (43) part, are additionally provided with spring (44), the spring in the spherical groove (42)
(44) one end and sliding pearl (43) are inconsistent, and the other end and the slot bottom of spherical groove (42) are inconsistent, are inserted into and fill when connector lug (3)
When slot allocation (41), sliding pearl (43) and the side of connector lug (3) are inconsistent.
9. the general PLC control system according to claim 8 for ring network cabinet motor control, which is characterized in that described
It is provided with LED light (52) in folder (51), the contact being connected on connector lug (3) for ground connection is provided in the caulking groove (31)
The first conductive sheet (61), the folder (51) is provided with the second conductive sheet (62), the LED light with respect to the one end of caulking groove (31)
(52) anode and the contact that offer power supply on connecting terminal (4) is connected to by conducting wire, cathode are connected on folder (51)
Second conductive sheet (62), the contact being grounded on first conductive sheet (61) and connector lug (3) are connect, when folder (51) be embedded in it is embedding
In slot (31) and when connector lug (3) successfully passes contact with connecting terminal (4) and connect, the first conductive sheet (61) is conductive with second
Piece (62) is inconsistent, and LED light (52) is lighted.
10. the general PLC control system according to claim 9 for ring network cabinet motor control, which is characterized in that described
Folder (51) is guide-lighting material, and when LED light (52) is lighted, folder (51) is by light directing fitting groove (41) notch of LED.
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| CN201910230074.7A CN109991916B (en) | 2019-03-25 | 2019-03-25 | Universal PLC control system for ring main unit motor control |
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| CN201910230074.7A CN109991916B (en) | 2019-03-25 | 2019-03-25 | Universal PLC control system for ring main unit motor control |
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| CN109991916B (en) | 2020-12-15 |
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