CN101694978B - Remote start-stop control circuit of motor - Google Patents
Remote start-stop control circuit of motor Download PDFInfo
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- CN101694978B CN101694978B CN2009100756982A CN200910075698A CN101694978B CN 101694978 B CN101694978 B CN 101694978B CN 2009100756982 A CN2009100756982 A CN 2009100756982A CN 200910075698 A CN200910075698 A CN 200910075698A CN 101694978 B CN101694978 B CN 101694978B
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Abstract
The invention relates to a remote start-stop control circuit of a motor, which comprises a control button and a control circuit that are connected together by a control wire, wherein the control circuit is made of the connection of the following units: a signal detection unit, a signal conversion unit, a start signal discrimination unit, a stop and failure signal discrimination unit, a switching-on execution unit and a switching-off execution unit. Electronic logic components are adopted in the units, thereby improving the stability and the reliability of the circuit. Meanwhile, two winding closed type relays are selected as execution units, and the switching-on execution unit and the switching-off execution unit are isolated from the remote control button, thereby avoiding false operation of the switching-on execution unit and the switching-off execution unit, which is caused by the failure of the control wire. Moreover, the circuit can automatically discriminate various wire failures and lock a switching-on loop so that the motor can not be automatically started, ensures the safety operation of underground equipment, and is a reliable remote control circuit device of the motor.
Description
Technical field
The present invention relates to a kind of motor start-stop control circuit, specifically, is a kind of control circuit that is used for the coal mine electrical starting and stops.
Background technology
Under coal mine, various high power motors are arranged on coal-face, but because the coal winning technology restriction; The control panel of motor all is set in the digging laneway; The two is far apart, and along with control mode more and more trends towards centralization, the power supply distance of control panel is also more and more far away; Therefore, the Long-distance Control of motor seems particularly necessary.
Early stage motor control circuit far away mostly is an adhesive characteristics design of utilizing unilateral conduction and the direct current relay of diode.A large amount of diodes and resistance, capacitor element have been adopted in this design; Reduced the stability of circuit so on the one hand; On the other hand because the dispersiveness of relay coil is bigger; Make that the matching and debugging of resistance, capacitance parameter is very loaded down with trivial details, and this kind design mostly exists malfunction, tripping, self-starting problem.Therefore, early stage precursor circuit can not satisfy present job requirement.At present; Motor control circuit far away mostly utilizes the self-holding contact of logic judging function and the relay of modern integrated-optic device to realize the Long-distance Control of motor; But it can't avoid the motor self-staring phenomenon that causes because of a kind of short trouble, causes potential safety hazard for the production of down-hole.
" electrotechnics journal (2003.07:64-65) discloses a kind of " essential safe type electronics leading control circuit ", and this precursor circuit is by control button 1, and control line 2 is formed with control circuit 3, and relies on modern integrated-optic device to realize guide's function.Its weak point is to distinguish a kind of short trouble and normal starting signal, and when electric control cable generation the type short trouble far away, circuit can think it is initiating signal by mistake, causes motor self-staring, and this never allows under coal mine.
Because in the above-mentioned prior art, motor control circuit far away is with starting and the shared loop of stop signal, and rely on the self-holding contact of relay to keep initiating signal, this just causes the generation of self-starting phenomenon easily, and then causes serious accident.
Summary of the invention
After the problem that the present invention will solve is the public control line and starting control line failed because that has now under the coal mine in the remote start-stop control circuit of motor; Circuit for remotely controlling can't be distinguished short trouble or normal starting, thereby causes the motor self-staring phenomenon.The purpose of this invention is to provide a kind of reliable motor start-stop control circuit.
The present invention adopts two loops to control starting and stop signal respectively; And the self-retaining function that utilizes two winding blocking relays has replaced the self-holding contact of common relay, avoids because of distinguishing the motor self-staring phenomenon that a kind of short trouble and normal starting signal cause.
The technical scheme of a kind of remote start-stop control circuit of motor of the present invention comprises control button, control line and control circuit, and its architectural feature is:
Described control button is that the upper end by starting button II is connected with the upper end of stop button II and the left end of public control line, and the lower end is connected with the anode of diode I; The negative electrode of diode I is connected with the left end of starting control line; The lower ends of the negative electrode of diode I I and stop button II connects, and anode is connected to form with the left end that stops control line;
Described control circuit is by detecting signal unit II, signal conversion unit II, initiating signal discriminating unit, stops to constitute with fault-signal discriminating unit, combined floodgate performance element and separating brake performance element; Described detecting signal unit II is used to have judged whether to produce starting, stop or the pulse signal of line fault; Signal conversion unit II is shaped as stable level signal with these pulse signals; The initiating signal discriminating unit has judged whether initiating signal; Stop to have judged whether stop signal or trip signal with the fault-signal discriminating unit; Whether the combined floodgate performance element closes a floodgate according to the output decision of initiating signal discriminating unit; The separating brake performance element is according to stopping and the output signal deciding of fault-signal discriminating unit separating brake whether;
Described control line is with control button and the control circuit formation that links together.
In the above-mentioned technical scheme of the present invention, described detecting signal unit II is that the left end with resistance I is connected with the right-hand member of public control line, and right-hand member is connected with the left end of AC power; The left end of resistance II is connected with the right-hand member of starting control line, and right-hand member is connected with the C end of optocoupler I and the A end of optocoupler II; The left end of resistance III is connected with the left end of right-hand member that stops control line and resistance IV, and right-hand member links to each other with the C end of optocoupler III; The right-hand member of resistance IV is connected with the C end of optocoupler IV; The right-hand member of AC power is connected with the A end of optocoupler I, the C end of optocoupler II, the A end of optocoupler III and the A end of optocoupler IV; The B end of optocoupler I is connected with the lower end of resistance V and the left end of resistance VI, and the D end is connected with ground; The B end of optocoupler II is connected with the lower end of resistance VII and the left end of resistance VIII, and the D end is connected with ground; The B end of optocoupler III is connected with the lower end of resistance IX and the left end of resistance XLI, and the D end is connected with ground; The B end of optocoupler IV is connected with the lower end of resistance XI and the left end of resistance XII, and the D end is connected with ground; The upper end of resistance V, resistance VII, resistance IX and resistance XI all is connected with power supply; The right-hand member of resistance VI, resistance VIII, resistance X and resistance XII is connected with the A end of inverter I, inverter II, inverter III and inverter IV respectively.
Described signal conversion unit II is connected monostable flipflop I+TR end with the A end of inverter I; Monostable flipflop II+TR end links to each other with the A end of inverter II; Monostable flipflop III+TR end links to each other with the A end of inverter III, monostable flipflop IV+the TR end holds with the A of inverter IV and is connected.
Described initiating signal discriminating unit is that the A of NAND gate end is connected with the Q end of monostable flipflop I, and the B end is connected with the Q end of monostable flipflop II, and the C end is held with the Y of XOR gate and is connected, Y hold with the combined floodgate performance element in the left end of resistance XV be connected.
Described stopping with the fault-signal discriminating unit is the A end of XOR gate to be held with the Q of monostable flipflop III link to each other; B end is connected with the Q end of monostable flipflop IV, and the left end of the resistance XIX in Y end and the separating brake performance element and the C of the NAND gate in the initiating signal discriminating unit hold to be connected and connect.
Described combined floodgate performance element is that the upper end with resistance XIII is connected with power supply, and the lower end is connected with the upper end of resistance XIV and the left end of resistance XVI; The lower end of resistance XIV is connected with ground; The Y end of the NAND gate in the left end of resistance XV and the initiating signal discriminating unit is connected, right-hand member and voltage comparator I+hold to be connected; The right-hand member of resistance XVI and voltage comparator I-end is connected; The closing coil of the VCC of voltage comparator I and power supply, blocking relay+negative electrode of end and diode III is connected, the GND end is connected with ground, OUT hold with the closing coil of blocking relay-hold and the anode of diode III is connected.
Described separating brake performance element is that the upper end with resistance XVII is connected with power supply, and the lower end is connected with the upper end of resistance XVIII and the left end of resistance XX; The lower end of resistance XVIII is connected with ground; The left end of resistance XIX with stop with the fault-signal discriminating unit in the Y end of XOR gate be connected, right-hand member and voltage comparator II+end links to each other; The right-hand member of resistance XX and voltage comparator II-end links to each other; The VCC end of voltage comparator II and power supply, blocking relay switching winding+negative electrode of end and diode V is connected, and the GND end is connected with ground, and OUT holds with the negative pole of the switching winding of blocking relay and the anode of diode V and is connected.
Described blocking relay is two winding locking type relays.
A kind of remote start-stop control circuit of motor of the present invention; Its beneficial effect is: detecting signal unit, signal conversion unit, initiating signal discriminating unit, stop all to adopt modern integrated-optic device with fault-signal discriminating unit, combined floodgate performance element and separating brake performance element; The stability and the reliability of circuit have been improved; Simultaneously; Select for use two winding locking type relays as performance element, with minute, the control button in combined floodgate performance element and a distant place isolates, and avoided branch, the misoperation of combined floodgate performance element because of the control line fault causes.In addition; Circuit has fully taken into account the various failure conditions that control circuit far away possibly occur when design; And discern various line faults and locking closing circuit through the logic judging function of logical device; Guaranteeing that motor can not produce the self-starting phenomenon, guaranteed the safety in production of down-hole, is a kind of reliable motor control circuit far away.
Description of drawings
Fig. 1 is the remote start-stop control circuit of motor block diagram of prior art;
Fig. 2 is a kind of remote start-stop control circuit of motor block diagram of the present invention;
Fig. 3 is the embodiment electrical block diagram of a kind of remote start-stop control circuit of motor of the present invention;
The timing waveform of subelement when Fig. 4 is a circuit operate as normal according to the invention;
The timing waveform of subelement when Fig. 5 is a circuit failed because according to the invention;
The timing waveform of subelement when Fig. 6 is a circuit generation disconnection fault according to the invention.
Among the figure: 1: control button; 2: control line; 3: control circuit; 4: starting button I; 5: stop button I; 6: diode I; 7: public control line; 8: the starting control line; 9: stop control line; 10: detecting signal unit I; 11 signal conversion unit I; 12: the signal discriminating unit; 13 performance elements; 14: relay normally open contact; 15: starting button II; 16: diode I; 17: stop button II; 18: diode I I; 19: detecting signal unit II; 20 signal conversion unit II; 21: the initiating signal discriminating unit; 22: stop and the fault-signal discriminating unit; 23: the combined floodgate performance element; 24: the separating brake performance element; 25: resistance I; 26: resistance II; 27: resistance III; 28: resistance IV; 29: AC power; 30: optocoupler I; 31: optocoupler II; 32: optocoupler III; 33: optocoupler IV; 34: power supply; 35: resistance V; 36: resistance VI; 37: ground; 38: resistance VII; 39: resistance VIII; 40: resistance IX; 41: resistance X; 42: resistance XI; 43: resistance XII; 44: inverter I; 45: inverter II; 46: inverter III; 47: inverter IV; 48: monostable flipflop I; 49: monostable flipflop II; 50: monostable flipflop III; 51: monostable flipflop IV; 52: NAND gate; 53: XOR gate; 54: resistance XIII; 55: resistance XIV; 56: resistance XV; 57: resistance XVI; 58: voltage comparator I; 59: the blocking relay closing coil; 60: diode III; 61: resistance XVII; 62: resistance XVIII; 63: resistance XIX; 64: resistance XX; 65: voltage comparator II; 66: the blocking relay switching winding; 67: diode V.
Embodiment
Make further detailed description below in conjunction with the accompanying drawing specific embodiments of the invention; Those skilled in the art is after having read this specific embodiment; Can understand with embodiment of the present invention be conspicuous, simultaneously, said effect of the present invention also can access embodiment.
Execution mode 1
Shown in Figure 1 is the remote start-stop control circuit of motor block diagram of known technology, comprises control button 1, control line 2 and control circuit 3.Wherein control button 1 is made up of starting button I 4, stop button I 5 and diode I 6.Said control button 1 is to be connected with distant place control circuit 3 through control line 2.Control circuit 3 is connected and composed by detecting signal unit I 10, signal conversion unit I 11, signal discriminating unit 12 and performance element 13 successively.Wherein, detecting signal unit I 10 left ends link to each other with control line 2 to detect and have or not starting, stop or failure pulse signal; Signal conversion unit I 11 converts above-mentioned pulse signal into stable level signal, is sent to signal discriminating unit 12; 12 pairs of signals of signal discriminating unit are handled, are analyzed rear drive performance element 13 and carry out starting and stopping control.It is pointed out that the public control line 7 among this figure is the loops at relay self-holding contact place, this control line omits in original text and does not draw; Here its benefit being drawn is to explain; When public control line 7 and starting control line 8 somewhere during failed because, the state that circuit state and starting button I 4 press is duplicate, and system can think it is the normal starting signal by mistake; Thereby send reclosing command, this never allows in the down-hole to take place.
Fig. 2 has provided by a kind of remote start-stop control circuit of motor block diagram of the present invention, comprises control button 1, control line 2 and control circuit 3.Wherein control button 1 is made up of starting button II 15, stop button II 17 diode I 16 and diode I I 18, and this control circuit links to each other with distant place control circuit 3 through control line 2.Control circuit 3 comprises detecting signal unit II 19, signal conversion unit II 20, initiating signal discriminating unit 21, stops and fault-signal discriminating unit 22, combined floodgate performance element 23 and separating brake performance element 24.Detecting signal unit II 19 left ends link to each other with control line 2 to detect and have or not starting, stop or failure pulse signal; Signal conversion unit II 20 converts above-mentioned pulse signal into stable level signal; Initiating signal discriminating unit 21 has judged whether initiating signal; Stop to have judged whether stop signal or fault sub-gate signal with fault-signal discriminating unit 22; Whether combined floodgate performance element 23 closes a floodgate according to the output signal deciding of initiating signal discriminating unit 21; Separating brake performance element 24 is according to stopping and the output signal deciding of fault-signal discriminating unit 22 separating brake whether.
Fig. 3 has provided a kind of circuit structure by the concrete scheme of a kind of remote start-stop control circuit of motor of the present invention.
The operation principle of a kind of remote start-stop control circuit of motor of the embodiment of the invention is described in detail as follows.1. when control line does not have any fault
During the control line fault-free, be divided into again that starting button II 15 does not all press with stop button II 17, only starting button II 15 presses, only stop button II 17 presses three kinds of states.Specify three kinds of operation principles under the state below in conjunction with Fig. 3 and Fig. 4.
(1) when starting button II 15 and stop button II 17 all do not press; Because starting button II 15 is a normally opened contact; Optocoupler I 30, not conducting of II 31 are so the A end pulse-free signal output of the A of inverter I 44 end, inverter II 45 remains low level.Stop button II 17 is a normally-closed contact, and string has diode I I 18 in the loop, so not conducting of optocoupler III 32, low level is kept in the A end no pulse output of inverter III 46, and optocoupler IV 33 conductings, the A end of inverter IV 47 has pulse output.Can be known that by last analysis at this moment, the Q of monostable flipflop I48 end is output as low level, the Q end of monostable flipflop II 49 is output as high level, and the Q end of monostable flipflop III 50 is output as low level, and the Q end of monostable flipflop IV 51 is output as high level.Therefore; The input of XOR gate 53 is respectively low level and high level; So 53 output high level, the high level of the low level of the Q end output of this high level and monostable flipflop I 48 and the Q end output of monostable flipflop II 49 is through NAND gate 52 back output high level.NAND gate 52 output high level make voltage comparator I's 58+and terminal voltage is higher than-holds, and therefore, the OUT of voltage comparator I 58 is a high level, closing coil 59 dead electricity of blocking relay 68.At this moment, XOR gate 53 is output as high level, can be known by above-mentioned voltage comparator characteristic, and the switching winding 66 of blocking relay 68 is dead electricity also.When two buttons were not all pressed, motor can be kept original operating state.The timing waveform of subelement is referring to Fig. 4.
(2) when starting button II 15 presses; Because the input polarity of optocoupler I 30 is identical with diode I 16; And only conducting in the half cycle of sinusoidal ac signal, so optocoupler I 30 has pulse output, and this pulse signal is shaped as the square-wave pulse of standard behind inverter I 44.Monostable flipflop I 48 has the pulse signal input at this moment, so output Q is a high level.The input polarity of optocoupler II 31 is opposite with diode I 16, therefore, all ends in the power supply positive-negative half-cycle, so no pulse output, this moment, monostable flipflop II 49 output Q still were high level.In like manner, owing to stop button II 17 does not press, and the input polarity of optocoupler III 32 is opposite with diode I I 18, thus no pulse output, so monostable flipflop III 50 output Q are low level.And the input polarity of optocoupler IV 33 is identical with diode I I 18, so pulse output is arranged, therefore, the output Q of monostable flipflop IV 51 is a high level.At this moment, have logic determines to know, XOR gate 53 is output as high level; The high level of the high level of this high level and monostable flipflop I 48 outputs and monostable flipflop II 49 outputs is through NAND gate 52 back output low levels; Characteristic by above-mentioned voltage comparator can know that the OUT of voltage comparator I 58 end is low level at this moment, so the closing coil 59 of blocking relay 68; And switching winding 66 dead electricity, so circuit normal starting.The timing waveform of subelement is referring to Fig. 4.
(3) when only having stop button II 17 to press, the output of monostable flipflop I48 and II49 is respectively low level and high level with the same when " two buttons are not all pressed " under the normal condition.And optocoupler III 32 and optocoupler IV 33 equal no pulse outputs, so the output Q of monostable flipflop III 50 and IV 51 is low level.These two low levels become low level through behind the XOR gate 53, can be known by the characteristic of above-mentioned voltage comparator, and the OUT end of voltage comparator II 65 is low level, and the switching winding 66 of blocking relay 68 gets electric, and circuit quits work.Meanwhile; Can know by logic determines; The high level of the low level of the low level of XOR gate 53 outputs and monostable flipflop I 48 outputs and monostable flipflop II 49 outputs is through NAND gate 52 back output high level, so closing coil 59 dead electricity of blocking relay 68.Can know by analyzing, closing coil 59 dead electricity of blocking relay 68 when stop button II17 presses, and switching winding 66 must be electric, this has just guaranteed reliably stopping of circuit.The timing waveform of subelement is referring to Fig. 4.
2. during short trouble
Can know that by Fig. 3 four kinds of short-circuit conditions possibly take place electric control cable far away, i.e. 7-8,8-9,7-9, four kinds of situation of 7-8-9 among the figure.Analyze one by one below:
(1) 7-8 short circuit
At this moment, starting button II 15, diode I 16 are fallen by short circuit, can not control use; Optocoupler I 30 and II 31 output pulse signals; 49 outputs are respectively high level and low level to monostable flipflop I 48 with II, can be known NAND gate 52 output high level by logic analysis.Characteristic by above-mentioned voltage comparator can know that the OUT of voltage comparator I 58 is a high level, so closing coil 59 dead electricity of blocking relay 68, motor is kept original operating state.This moment is if press stop button II17, and then the output of XOR gate 53 is the same when " only having stop button II 17 to press " under the above-mentioned normal condition, is low level, thus switching winding 66 electric, can realize that motor stops.Find that through above-mentioned analysis when the 7-8 failed because, stop button can be realized the hold function of motor, and circuit is when fault is got rid of not, motor can not start once more.The timing waveform of subelement is referring to Fig. 5.
(2) 8-9 short circuit
When 8-9 short circuit and two buttons are not all pressed; Being equivalent to starting button II 15 is pressed; But opposite polarity diode I I 18 has replaced the rectification function of diode I 16 in the original start loop, so the output of optocoupler I 30 no pulse, monostable flipflop I 48 output Q are low level.And light-emitting diode and diode I I 18 same polarities among this moment optocoupler II 31, so pulse output is arranged, the Q of monostable flipflop II 49 holds and is output as low level.Monostable flipflop III 50 and IV 51 are with the same when " stop button is not pressed " under the normal condition, and output is respectively low level and high level, so XOR gate 53 is output as high level, and switching winding 66 dead electricity of blocking relay 68.Again because the output of monostable flipflop I 48, monostable flipflop II 49 and XOR gate 53 is respectively low level, low level, high level, so NAND gate 52 is output as high level.So the closing coil 59 of blocking relay 68 is dead electricity also, circuit can self-starting.
When the 8-9 short circuit and when only having starting button II 15 to press; Through analyze can find diode I 16 and diode I I18 rectification function all with malfunctioning; So optocoupler I30, II 31, III 32, IV 33 will have pulse output, so the output of monostable flipflop I 48, II 49, III 50, IV 51 is respectively high level, low level, high level, high level.Can know that by analyzing the output Y of NAND gate 52 is a high level, thus closing coil 59 dead electricity of blocking relay 68, the motor fail to start.And this moment, XOR gate 53 is output as low level, so the switching winding 66 of blocking relay 68 must be electric, motor is out of service immediately.
When the 8-9 short circuit and when only having stop button II 17 to press, the same when being equivalent to " only press stop button II 17 " under the normal condition, motor will be out of service immediately.
In a word, when 8-9 is short-circuited, press stop button II17 after, can realize the motor hold function, and fault do not get rid of before motor can not start once more.The timing waveform of subelement is referring to Fig. 5.
(3) 7-9 short circuit
When the 7-9 short circuit, it is malfunctioning to be equivalent to diode I I 18, so optocoupler III 32 has pulse output with IV 33,51 outputs are high level to monostable flipflop III 50 with IV.Therefore, XOR gate 53 is output as low level.So it is electric that the switching winding 66 of blocking relay 68 gets, motor is out of service.Because XOR gate 53 is output as low level, thus though the state of monostable flipflop 48 and 49 how, the output of NAND gate 52 is high level, thus closing coil 59 dead electricity of blocking relay 68, the motor fail to start.The timing waveform of subelement is referring to Fig. 5.
(4) 7-8-9 short circuit simultaneously
The failure condition of this moment is identical with (2) " when 2 short circuits of 8-9 and starting button II 15 press " of planting in the short trouble, repeats no more here.The timing waveform of subelement is referring to Fig. 5.
In a word, when above-mentioned short trouble takes place when, press stop button II 17 after, motor can both stop, and before fault got rid of, motor can not start once more.
3. during disconnection fault
Can know that by Fig. 3 circuit of the present invention maybe disconnection fault take place at 7,8,9 three places, analyzes one by one below.
During (1) 7 broken string
When broken string takes place in public control line 7; The path of sinusoidal signal is cut off; All no pulse output of four optocoupler I 30, II 31, III 32, IV 33 is so the output of monostable flipflop I 48, II 49, III 50, IV 51 is respectively low level, high level, low level, low level.At this moment, NAND gate 52 is output as high level, so the closing coil dead electricity of blocking relay 68, the motor fail to start.And XOR gate 53 is output as low level, and the switching winding of blocking relay 68 gets electric, and motor is out of service.The timing waveform of subelement is referring to Fig. 6.
During (2) 8 broken strings
Starting button II 15 is malfunctioning with diode I 16 when 8 broken string takes place, and the situation of this moment is with the same when " two buttons are not all pressed " under the normal condition, and motor is kept original state.But after pressing stop button II 17, motor can stop, and before the fault eliminating, motor can not start once more.The timing waveform of subelement is referring to Fig. 6.
During (3) 9 broken strings
When 9 broken string takes place when, be equivalent to stop button II 17 and press, can know that by above-mentioned analysis no matter whether starting button II 15 presses, motor all is in halted state always.The timing waveform of subelement is referring to Fig. 6.
In a word, when above-mentioned disconnection fault takes place when, press stop button II 17 after, motor can both stop, and before fault got rid of, motor can not start once more.
The described essential safe type precursor circuit of remote start-stop control circuit of motor more of the present invention and Fig. 1.Under electric control cable normal condition far away, both all can realize normal guide's function.But when the described essential safe type precursor circuit of Fig. 1 was short-circuited with starting control line 8 at public control line 7 somewhere, the state that circuit state and starting button I 4 press was duplicate, and system can think it is the normal starting signal by mistake, causes the self-starting phenomenon.The invention circuit mainly relies on the logic judging function of modern electronic devices and the blocking function of locking type relay, the motor self-staring problem when having overcome the remote cable failed because.The result shows that the present invention can improve fail safe, the reliability of coal mine electrical control circuit far away.
Claims (1)
1. remote start-stop control circuit of motor, it contains control button, and control line and control circuit is characterized in that:
The upper end of the starting button II (15) of described control button (1) is connected with the left end of the upper end of stop button II (17) and public control line (7), and the lower end of starting button II (15) is connected with the anode of diode I (16); The negative electrode of diode I (16) is connected with the left end of starting control line (8); The lower ends of the negative electrode of diode I I (18) and stop button II (17) connects, and the anode of diode I I (18) is connected to form with the left end that stops control line (9);
Described control circuit (3) is by detecting signal unit II (19) signal, converting unit II (20), initiating signal discriminating unit (21), stops to constitute with fault-signal discriminating unit (22), combined floodgate performance element (23) and separating brake performance element (24); Described detecting signal unit II (19) is used to have judged whether to produce starting, stop or the pulse signal of line fault; Signal conversion unit II (20) is shaped as stable level signal with these pulse signals; Initiating signal discriminating unit (21) has judged whether initiating signal; Stop to have judged whether stop signal or trip signal with fault-signal discriminating unit (22); Whether combined floodgate performance element (23) closes a floodgate according to the output decision of initiating signal discriminating unit (21); Separating brake performance element (24) is according to stopping and the output signal deciding of fault-signal discriminating unit (22) separating brake whether;
Described control line (2) links together control button (1) and control circuit (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100756982A CN101694978B (en) | 2009-10-11 | 2009-10-11 | Remote start-stop control circuit of motor |
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|---|---|---|---|
| CN2009100756982A CN101694978B (en) | 2009-10-11 | 2009-10-11 | Remote start-stop control circuit of motor |
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| CN101694978A CN101694978A (en) | 2010-04-14 |
| CN101694978B true CN101694978B (en) | 2012-03-28 |
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2009
- 2009-10-11 CN CN2009100756982A patent/CN101694978B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101694978A (en) | 2010-04-14 |
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Granted publication date: 20120328 Termination date: 20171011 |