CN2362235Y - Mine magnetic starter with photoelectric coupling guide circuit - Google Patents

Mine magnetic starter with photoelectric coupling guide circuit Download PDF

Info

Publication number
CN2362235Y
CN2362235Y CN 98246151 CN98246151U CN2362235Y CN 2362235 Y CN2362235 Y CN 2362235Y CN 98246151 CN98246151 CN 98246151 CN 98246151 U CN98246151 U CN 98246151U CN 2362235 Y CN2362235 Y CN 2362235Y
Authority
CN
China
Prior art keywords
far
circuit
utility
model
button
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 98246151
Other languages
Chinese (zh)
Inventor
杨卫英
郑国莘
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN 98246151 priority Critical patent/CN2362235Y/en
Application granted granted Critical
Publication of CN2362235Y publication Critical patent/CN2362235Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Relay Circuits (AREA)

Abstract

The utility model relates to a mine magnetic starter with a photoelectric coupling intrinsically safe guide circuit, and the utility model comprises a flame-proof casing, an isolation reversing switch, a main contactor, a main transformer, a current mutual inductor, an isolation relay and a control circuit device, wherein, the control circuit device adopts the photoelectric coupling intrinsically safe guide circuit, the control circuit device is automatically tested and controlled by a microcomputer, and the control circuit device has digital display. The power supply of the utility model has a wide adoption range, the power consumption of the utility model is decreased, the safety performance of the utility model is enhanced, and the working reliability of the utility model is increased. The utility model can display the state information of start, stop, the short circuit of a cable, etc., the utility model is intuitive and reliable and is convenient for personnel to monitor or eliminate malfunction, and the utility model is widely suitable for the use of the mining industry.

Description

The mining magnetic starter that has photoelectric coupling type intrinsic safety precursor circuit
The utility model relates to mining magnetic starter, particularly a kind of mining magnetic starter that has photoelectric coupling type intrinsic safety precursor circuit.
At present, the mining magnetic starter of Flameproof and intrinsically safe generally adopts direct current electromagnetic relay type intrinsic safety guide loop, its effect is after obtaining the starting and stopping signal by button, by relay control signal is passed to main contactor, control the opening, stop of main contactor realizes mining motor opened, stops control.In actual use, there is following defective in this relay-type intrinsic safety guide loop:
1) for satisfying the intrinsic safety requirement, the operating voltage of direct current electromagnetic relay coil, electric current can not be too big, and the actuating of relay needs enough energy, thereby very high requirement has been proposed relay performance, the existing relay consistency is poor, and difficulty meets the demands, and usually can not move ideally.
2) the direct current electromagnetic relay operating voltage has certain scope, and the supply power voltage of mining electric equipment often has than great fluctuation process, often causes the relay tripping.
3) for making relay adhesive when starting button is pressed, can not adhesive during the control cable short circuit, the resistance of in the loop, having connected, electric capacity in parallel, this has increased the complexity of circuit on the one hand, and these component parameters ranges of choice are very little on the other hand, overrun and to make relay be difficult to adhesive maybe can not to satisfy the intrinsic safety requirement, can cause also during voltage fluctuation that circuit function is not normal, it is desirable that unstable properties, reliability are owed.
The purpose of this utility model is to overcome the above-mentioned deficiency of prior art, and a kind of mining magnetic starter that has photoelectric coupling type intrinsic safety precursor circuit is provided, to improve the voltage adaptation and the functional reliability of magnetic starter.
Mining magnetic starter of the present utility model is the innovative product of existing product, and it comprises: flameproof enclosure (30), the main contactor KM, the main transformer T that isolate reversing switch (1), driven by solid-state relay 1, current transformer (2), the disconnecting relay J that drives by solid-state relay 1, intrinsic safety transformer T 2And control circuit device.
Described control circuit device comprises: single-chip microcomputer (4), be connected in eprom memory (7), I/O interface circuit (18,19), A/D converter (17) on single-chip microcomputer (4) AB, DB, the CB bus, be connected in the sample circuit (16) of A/D change-over circuit (17) input, be connected in the LED digital display board (5) of I/O interface circuit (19) output, and the toggle switch (23) that is connected with I/O interface circuit (18).
It is characterized in that: also comprise the photoelectric coupling type intrinsic safety precursor circuit (3) that is connected in single-chip microcomputer (4) I/O mouth.This circuit contains: photoelectrical coupler IC 1, IC 2, IC 3, IC 4, current-limiting resistance Ra, Rb, Rc, Rd, intrinsic safety transformer T 2, far and near control switch (8), starting button (10), stop button (11) is far controlled starting button (12), far controls stop button (13), is used to judge the diode D of starting or cable short circuit state 1, D 2Photoelectrical coupler IC 1, IC 2The input series aiding connection, photoelectrical coupler IC 3, IC 4The input series aiding connection, IC 1Positive input terminal and IC 3Negative input end all meet intrinsic safety transformer T 2Secondary winding, IC 2Negative input end and IC 4Positive input terminal all connect the end of series resistance Ra, Rb, intrinsic safety transformer T 2Another termination series resistance of secondary winding Rd, the end of Rc, starting button (10), stop button (11) and diode D 1Series connection, the common port of starting button (10) and stop button (11) and the other end of starting button (10) connect c, a end of far and near control switch (8) respectively, far control starting button (12), far control stop button (13) and diode D 2Series connection, the other end of the common port of control starting button far away (12) and stop button (13) and control starting button far away (12) connects d, the b end of far and near control switch (8) respectively, the e end of far and near control switch (8) connects the other end of series resistance Ra, Rb, and the e of far and near control switch (8), f end span meet the normally opened contact KM of master control by tentaculum KM 2, diode D 1, D 2Negative terminal all connect the other end of series resistance Rd, Rc, photoelectrical coupler IC 1～IC 4One end of output all connects positive supply, photoelectrical coupler IC 1～IC 4The other end of output meets the P of single-chip microcomputer (4) respectively 1.0, P 1.1, P 1.3, P 1.2End.
Description of drawings of the present utility model is as follows:
Fig. 1 is the profile schematic diagram of magnetic starter;
Fig. 2 is its control circuit figure;
Fig. 3 is its workflow diagram.
Each several part among Fig. 1 is respectively: shell (30), door (33), be welded on the sled (34) on the shell, control cable line outlet (35), (36), power cable line outlet (31), (32), be contained in the isolating switch (1) on the shell, be contained in the display circuit utmost point (5) at door (33) back side, be contained in starting button (10), stop button (11), leak(age) test button (21), overcurrent test button (22) and reset button (20) on the door.
In control circuit figure shown in Figure 2, (1) for isolating reversing switch, (2) are current transformer, and KM is a main contactor, T 1Be main transformer, it provides two groups of 36V AC, 9V AC, one group of 36V ACVoltage is given control circuit, main tentaculum KM and the disconnecting relay J of pressing 1Coil working.T 2Be the intrinsic safety transformer, it organizes 36V with another ACBecome 12V AC
The core of this circuit is single-chip microcomputer (4), select 8031 single-chip microcomputers among the figure for use, by AB, DB, CB three buses and eprom memory (7), I/O interface circuit (18,19), and A/D change-over circuit (17) be connected, button (20) is a reset button, and the current signal of current transformer (2) output becomes 0～5V through sample circuit (16) DCVoltage signal is sent into A/D circuit (17), so sends into single-chip microcomputer (4) again and handles.Electric leakage signal is through D 3, J 1-1, KM 1Enter sample circuit (16), become 0～5V DCBehind the voltage signal, enter A/D circuit (17) again.Be connected in diode D 3And the button between the ground (21) is used for the earth leakage search/lockout function of testing circuit.The button (22) that is connected in sample circuit (16) is used for the overcurrent protection function of testing circuit.(23) be toggle switch, current setting imported single-chip microcomputer (4) by I/O interface (18).(5) be LED numeral display floater, it is connected in the output of I/O interface (19).J 2Be control relay, single-chip microcomputer (4) is controlled its action by I/O interface (18), when many chain control, and J 2-1The start-stop of next starter is controlled in the contact.(6) be the auxiliary contact of second starter main contactor, when being used for many chain controls, the signal feedback of next start-stop state.
(3) be photoelectric coupling type intrinsic safety precursor circuit, it comprises: optical coupler IC 1～IC 4, current-limiting resistance Ra, Rb, Rc, Rd, far and near control switch (8), starting button (10), stop button (11) is far controlled the control starting button far away (12) in the box, far controls stop button (13), is used to judge the diode D of starting or cable short circuit 1, D 2, be used for the main contactor auxiliary contact KM of initiating signal self-insurance 2
Photoelectric coupling type intrinsic safety precursor circuit is when starting process, stopped process and control cable short circuit, respectively to the P of single-chip microcomputer 8031 1Port is sent into the control corresponding level.
Starting process: far and near control switch (8) is in when upper, presses starting button (10), T 2Secondary through IC 1, IC 2, R a, R b, starting button (10), stop button (11), diode D 1, R c, R dForm the closed-loop path, IC 1, IC 2Conducting, IC 1, IC 2Output become high level, at R 1C 1, R 2C 2Last generation direct current high level enters the P of single-chip microcomputer 1.0, P 1.1Port.At this moment, since the unilateral conduction of diode, IC 3, IC 4Not conducting is so the low level of their output enters the P of single-chip microcomputer respectively 1.2, P 1.3Port, the same when far and near control switch (8) is in when the next with the starting process of control starting button far away (12) control, repeat no more.
Stopped process: under starting state, when far and near control switch is in when upper, press stop button (11), then control circuit no longer forms closed-loop path, IC 1～IC 4All not conductings, output is low level, sends into the P of single-chip microcomputer 1.0, P 1.1, P 1.3, P 1.2End under program control, passes through P 1.5Output low level makes solid-state relay SSR 2Output is opened circuit, and main contactor is discharged.When far and near control switch (8) is in when the next, the same with the stopped process of control journey stop button far away (13) control, repeat no more.
The control cable short circuit: when cable short circuit, T 2Secondary through IC 1, IC 2, Ra, Rb, Rc, Rd, form the closed-loop path, through IC 3, IC 4, Ra, Rb, Rc, Rd also form closed-loop path, IC 1～IC all exports high level, and single-chip microcomputer makes P by after receiving these four high level 1.4, output low level, make main contactor KM fail to start.
Whole working as shown in Figure 3.
Set-up procedure: after powering on, single-chip microcomputer is exported high level from P1.4, makes SSR 1Adhesive, J 1Adhesive, leakage detecting circuit is communicated with, and resistance signal is through D 3, J 1-1, KM 2Enter sample circuit (16), send into single-chip microcomputer through A/D converter (17), when leak resistance resistance during greater than rated value, complete machine is in standby condition.
Earth leakage search/lockout:
As leak electricity, perhaps on panel, pressing the button (21), resistance signal is through D 3, J 1-1, KM 1Enter sample circuit, send into single-chip microcomputer through the A/D conversion, single-chip microcomputer is carried out earth leakage search/lockout, even at this moment press starting button, P 1.0, P 1.1Become high level, can not start main contactor.
Starting process:
Under standby condition, if press starting button, P 1.0, P 1.1Become high level, P 1.2, P 1.3Be low level, single-chip microcomputer is at first to P 1.4Output low level makes SSR 1Disconnect J 1Disconnect, electric-leakage detection circuit is disconnected, then to P 1.5The output high level makes SSR 2Adhesive, starting process is finished in the KM adhesive.
Attracting state:
After starting is finished, enter attracting state.Single-chip microcomputer detects the signal of three current values, program control feedback signal and optocoupler type precursor circuit in turn, and to LED digital display circuit output services current value.
The overcurrent protection process:
Under attracting state, if electric current is high more according to the overcurrent multiple greater than load current value, the short more principle of power-off time is implemented outage, and single-chip microcomputer is from P 1.5Output low level, SSR 2Disconnect, KM disconnects, and realizes protection.While current value when the digital display circuit output overcurrent.
The open phase protection process:
Under attracting state, if certain phase current much smaller than other phase current values, the phase failure takes place, single-chip microcomputer is from P 1.5Output low level, SSR 2Disconnect, KM disconnects, and realizes protection, simultaneously to digital display circuit output phase failure phase sequence number.
Program control protection process:
Under attracting state, the state of many program control selector switches (24) is by I/O interface (18) input single-chip microcomputer.If be in program control state, then single-chip microcomputer obtains second state of calling starter auxiliary contact (6) together by I/O interface (18), if second is started, then enters normal operation, if second was not started in 9 seconds, then single-chip microcomputer is from P 1.5Output low level, SSR 2Disconnect, KM disconnects, and realizes protection.Simultaneously to digital display circuit output program control protection code.
Stopped process:
Under attracting state, if press stop button, then P 1.0, P 1.1Become low level, single-chip microcomputer is from P 1.5Output low level, SSR 2Disconnect, KM disconnects, and realizes stopping.After the time-delay, single-chip microcomputer is from P 1.4The output high level makes SSR 1Adhesive, J 1Adhesive, leakage detecting circuit is communicated with, and enters standby condition.
Advantage of the present utility model is as follows:
Starter of the present utility model adopts the photoelectric coupling precursor circuit, replaced traditional starter DC relay type intrinsic safety pilot circuit has been realized microcomputer control. Cancelled and be prone to electric, mechanical breakdown Electromagnetic relay, replace photoelectrical coupler, the power-dissipation-reduced of circuit about 20%, enlarged it to electricity The adaptability scope in source, it is 75～150% that the traditional electrical magnetic relay adapts to the power-supply fluctuation scope, and this photoelectricity coupling The mould assembly product scope can expand 30～300% to. Change traditional inductance capacitance intrinsically safe circuit into resistive originally The peace circuit, components and parts reduce, and have improved its voltage adaptation, have reduced the power output of circuit intrinsic safety port, The intrinsic safety enhancing, reliability increases.
The starter complete machine is realized microcomputer auto-test control, and numeral shows, can at any time show on display floater The information such as starting state, halted state and cable short circuit fault, intuitive and reliable, be convenient to work people supervision or row Except fault.

Claims (1)

1, a kind of mining magnetic starter that has photoelectric coupling type intrinsic safety precursor circuit comprises: flameproof enclosure (30), the main contactor KM, the main transformer T that isolate reversing switch (1), driven by solid-state relay 1, current transformer (2), the disconnecting relay J that drives by solid-state relay 1, intrinsic safety transformer T 2And control circuit device;
Described control circuit device comprises: single-chip microcomputer (4), be connected in eprom memory (7), I/O interface circuit (18,19), A/D converter (17) on single-chip microcomputer (4) AB, DB, the CB bus, be connected in the sample circuit (16) of A/D converter (17) input, be connected in the LED digital display board (5) of I/O interface circuit (19) output, and the toggle switch (23) that is connected with I/O interface circuit (18):
It is characterized in that: also comprise the photoelectric coupling type intrinsic safety precursor circuit that is connected in single-chip microcomputer (4) I/O mouth; This circuit contains: photoelectrical coupler IC 1, IC 2, IC 3, IC 4, current-limiting resistance Ra, Rb, Rc, Rd, intrinsic safety transformer T 2, far and near control switch (8), starting button (10), stop button (11) is far controlled starting button (12), far controls stop button (13), is used to judge the diode D of starting or cable short circuit state 1, D 2, photoelectrical coupler IC 1And IC 2The input series aiding connection, photoelectrical coupler IC 3And IC 4The input series aiding connection, IC 1Input anode and IC 3The input negative terminal all meets intrinsic safety transformer T 2One end of secondary winding, IC 2Input negative terminal and IC 4The input anode all connect the series connection Ra, Rb an end, intrinsic safety transformer T 2Another termination series resistance Rd of secondary winding, the end of Rc, starting button (10), stop button (11) and diode D 1Series connection, the common port of starting button (10) and stop button (11) and the other end of starting button (10) connect c, a end of far and near control switch (8) respectively, far control starting button (12), far control stop button (13) and diode D 2Series connection, the other end of the common port of control starting button far away (12) and stop button (13) and control starting button far away (12) connects d, the b end of far and near control switch (8) respectively, far and near control switch (8) e end connects the other end of series resistance Ra, Rb, and the e of far and near control switch (8), f end span meet the normally opened contact KM of main contactor KM 2, diode D 1, D 2Negative terminal all connect the other end of series resistance Rd, Rc, photoelectrical coupler IC 1, IC 2, IC 3, IC 4One end of output all meets positive source, IC 1, IC 2, IC 3, IC 4The other end of output meets the P of single-chip microcomputer (4) respectively 1.0, P 1.1, P 1.3, P 1.2End.
CN 98246151 1998-11-05 1998-11-05 Mine magnetic starter with photoelectric coupling guide circuit Expired - Fee Related CN2362235Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 98246151 CN2362235Y (en) 1998-11-05 1998-11-05 Mine magnetic starter with photoelectric coupling guide circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 98246151 CN2362235Y (en) 1998-11-05 1998-11-05 Mine magnetic starter with photoelectric coupling guide circuit

Publications (1)

Publication Number Publication Date
CN2362235Y true CN2362235Y (en) 2000-02-02

Family

ID=33991697

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 98246151 Expired - Fee Related CN2362235Y (en) 1998-11-05 1998-11-05 Mine magnetic starter with photoelectric coupling guide circuit

Country Status (1)

Country Link
CN (1) CN2362235Y (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101826714A (en) * 2010-03-09 2010-09-08 天津市天矿电器设备有限公司 Intrinsically-safe type control device
CN102332909A (en) * 2011-07-18 2012-01-25 山西潞安环保能源开发股份有限公司 Intrinsic safety pilot circuit
CN103378548A (en) * 2012-04-28 2013-10-30 天津市天矿电器设备有限公司 Explosive-proof switch for mine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101826714A (en) * 2010-03-09 2010-09-08 天津市天矿电器设备有限公司 Intrinsically-safe type control device
CN101826714B (en) * 2010-03-09 2012-07-25 天津市天矿电器设备有限公司 Intrinsically-safe type control device
CN102332909A (en) * 2011-07-18 2012-01-25 山西潞安环保能源开发股份有限公司 Intrinsic safety pilot circuit
CN102332909B (en) * 2011-07-18 2015-06-03 山西潞安环保能源开发股份有限公司 Intrinsic safety pilot circuit
CN103378548A (en) * 2012-04-28 2013-10-30 天津市天矿电器设备有限公司 Explosive-proof switch for mine

Similar Documents

Publication Publication Date Title
CN1074203C (en) Frequency converter for electromotor
WO2022127160A1 (en) Opening/closing operation apparatus for multiple types of circuit breaker, and fault detection method
CN100431253C (en) Power unit and high-voltage frequency converter with contactor bypass function
CN201413939Y (en) Electrical interlocking system of inlet wire and interconnection switch for switch apparatus
CN101355313B (en) Self-checking circuit for switching of three-phase rectifier
CN2362235Y (en) Mine magnetic starter with photoelectric coupling guide circuit
CN109095298B (en) Elevator system
CN103166538B (en) Reversible magnetic starter of general power-driven multi-turn execution mechanism
CN206452094U (en) A kind of intelligent self-recovery protector of overvoltage/undervoltage
CN200990575Y (en) Elevator frequency changer external hanging energy feedback device
CN201204570Y (en) AC contactless control switch
CN210838466U (en) Vacuum circuit breaker control circuit for 10kV capacitor
CN209326954U (en) A kind of breaker operation mechanism running-in test system
CN208001183U (en) Backup auto-activating device and system
CN208420975U (en) Dual power supply switching equipment testing auxiliary device
CN102088262B (en) Remote control device of explosion proof motor
CN201846063U (en) Mining explosion-proof alternating-current vacuum electromagnetic starter
CN206099510U (en) Control system is hauled oneself willingly into fully to three inlet wires of low pressure, three female antithetical couplets based on PLC realizes
CN2781546Y (en) High-voltage double power supple selfpoperation and mutual operation locking device
CN213243549U (en) Novel band-type brake power supply system of construction elevator frequency converter
CN2206517Y (en) Automatic coupling decompression starting cabinet for double asynchronous electric motor
CN2713712Y (en) Double power supply switching arrangement
CN209913737U (en) Intelligent magnetic starter
CN206834826U (en) A kind of single-phase low capacity dual power supply quick converting switch
CN201238154Y (en) Mining power distribution and multipath control integrated switch

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C19 Lapse of patent right due to non-payment of the annual fee
CF01 Termination of patent right due to non-payment of annual fee