CN1117213A - Full-function protector for electric machine - Google Patents
Full-function protector for electric machine Download PDFInfo
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- CN1117213A CN1117213A CN 94118614 CN94118614A CN1117213A CN 1117213 A CN1117213 A CN 1117213A CN 94118614 CN94118614 CN 94118614 CN 94118614 A CN94118614 A CN 94118614A CN 1117213 A CN1117213 A CN 1117213A
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- resistance
- contactor
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Abstract
The said protector can effectively protect electric machine from the faults caused by overload, phase failure, stall, overvoltage or undervoltage as well as overhumidity, Leakage, friction between stator and rotor, and short circuit. It has temp. sensor, humidity sensor, transistor, friction probe, and a optosensitive diode for detection and processing. It can display the motor winding temp. and fault category, and its automatic stop mechanism can realize the automatic stop in case of fault. It can aloso protect various start equipments.
Description
The present invention relates to a kind of motor multifunctional protection device, belong to electronic technology field.
At present the electric motor protective device that electric machine temperature rise is detected with thermistor all is not provided with faults such as stator to motor rubs mutually with rotor, leaks electricity, wet excessively, short circuit in winding simultaneously and detects and protect.The overheated effective detection that three thermistors can only cause over current of motor, and the stator of motor rubs mutually with rotor, leaks electricity, water inlet or faults such as excessive moisture and short circuit in winding are just generated heat on the fault point, be local pyrexia, thermistor be difficult for detected.Simultaneously at present the electric motor protective device that uses all can not be protected the starting equipment of the various start modes of motor.
The purpose of this invention is to provide a kind of can be to motor overheating; stator rubs mutually with rotor; electric leakage; the water inlet or made moist wet; various faults such as the short circuit in winding and the phase failure can both be distinguished effectively and detects, shows; and automatic shutdown protection, and be provided with the motor protecter that 10 grades of motor winding temperature rises show and approaching permission maximum operating temperature is reported to the police automatically (calling high temperature alarm in the following text), can effectively protect the starting equipment of various start modes simultaneously.
The objective of the invention is to be realized by following scheme: 1. three thermistors or temperature-sensitive pipe are close to the three-phase winding overhang of the poorest motor of radiating condition respectively; temperature rise to three phase windings detects in real time; detected signal is periodically delivered to the input of a display driving integrated circuit respectively by electronic switch; after the display driving integrated circuit inter-process, outwards export by 10 pins; drive 10 luminous tubes respectively the temperature rise of motor windings is demonstrated 10 grades of temperature; when the approaching permission of motor winding temperature rise maximum operating temperature; the driving high temperature alarm is reported to the police; when motor winding temperature rise surpasses the permission working temperature; the upset of triggering bistable circuit; overheating fault shows that luminous tube is bright; and drive to close machine mechanism and shut down automatically, motor is protected.2. adorn a metal bougie that exceeds 0.05 millimeter in notch at stator iron stamen notch, horizontal machine only is contained in a minimum groove, and vertical machine is respectively adorned one in a groove and the symmetrical channels thereof of rotor walk tendency (as the tension of belt).Because of action of gravity, the rotor of horizontal machine is easier to rub mutually with the notch iron stamen of a minimum groove.This metal bougie links to each other with the trigger end of bistable circuit with lead.Because of rotor connects negative supply, when stator and rotor will rub, rotor at first touched mutually with the metal bougie, thereby triggered the bistable circuit upset, and tribological failure shows that luminous tube is bright, and shutdown automatically.3. make the motor detection of electrical leakage with triode, transistor collector connects the trigger end of bistable circuit, and emitter connection circuit ground (negative supply) also is motor casing, and base stage is joined through resistance and the earth.When electric leakage took place motor, triode triggered the bistable circuit upset, and leak current fault shows that luminous tube is bright, and shutdown automatically.Between circuit ground and the earth, be connected to two shunt diodes, when leakage current is big, triode protected.4. humidity sensor is loaded on lowest part in the motor, and an electrode of humidity sensor connects the trigger end of bistable circuit, another root electrode connection circuit ground (negative supply).After humidity sensor made moist, its two interelectrode resistance value descended, and when resistance value dropped to certain value, the bistable circuit upset was crossed wet fault and shown that luminous tube is bright, and shutdown automatically.5. in the motor two end cap, respectively adorn a photosensitive tube or photo resistance, when motor windings is short-circuited, the electric spark direct projection that is produced or reflex on the photosensitive tube, photosensitive tube triggers the bistable circuit upset, short trouble shows that luminous tube is bright, and shutdown automatically, prevents that short trouble from enlarging.6. be connected into star with three resistance, join with three live wires respectively, the base stage of neutral point and triode is joined, the collector and emitter of triode joins with trigger end and circuit ground (negative supply) of bistable circuit respectively, and when the phase failure took place, neutral point voltage raise, the triode conducting, the upset of triggering bistable circuit, open phase fault show that luminous tube is bright, and shutdown automatically.7. control starting with the normally opened contact of shutdown driving relay and close machine mechanism, can prevent motor starting operation under the idle situation of protector.8. when actuating motor, with rectifier bridge 380 volts or 220 volts of AC rectification are helped the pressure direct current, the sucking coil for starting equipment can make the closing of contact reliable rapidly, adopt capacitance decompression to be rectified into the sucking coil that low-voltage DC is supplied with starting equipment again after the closing of contact, keep the closing of contact.
Overheated, the stator that the present invention can cause owing to any reason motor simultaneously rubs mutually, leaks electricity, intakes with rotor or the protection effectively respectively of faults such as wet excessively, the short circuit in winding and the phase failure, and can protect effectively the starting equipment of various start modes.The present invention is provided with motor winding temperature rise and shows and high temperature alarm; make administrative staff in time grasp motor ruuning situation,, can in time adopt remedial measures in case find temperaturing lifting abnormality; (as lighten the load, strengthen heat radiation) or carry out the preparation (as stopping charging) of shutdown.Adopt display driving integrated circuit that the processing and the driving of electric machine temperature rise signal are shown, than much lower with the MICROCOMPUTER PROCESSING cost.And various faults all have demonstration, so that administrative staff in time find guilty culprit and eliminating, adopt bistable circuit can allow the actuating of relay clear-cut, and bistable circuit cooperates with electric capacity, and antijamming capability is very strong, is that other circuit are incomparable.If forget and open the protector power supply, motor can't start, and operational procedure is carried out effective supervision, avoids motor to start under the unprotect state.The sucking coil of starting equipment adopts direct current supply, can be when line voltage be low the closing of contact reliable rapidly, it is unreliable and sparking damages the contact and cause the shortcoming of the phase failure to have overcome the closing of contact, adopts low-voltage DC supply to keep adhesive, not only economizes on electricity but also can prevent the sucking coil heating burnout.
The explanation of accompanying drawing drawing:
Fig. 1 is the motor protecter block diagram.
Fig. 2 is circuit theory diagrams.
Fig. 3, Fig. 4 are stators and transfer to tribological failure detector arrangement and installation mutually
Position view.
Fig. 5 is the humidity sensor structure chart.
Fig. 6 is a humidity sensor installation site schematic diagram.
Fig. 7 is the winding diagram that carries out direct-on-line starting with the button control contactor.
Fig. 8 is the winding diagram with lever operated auto-transformer starter.
Fig. 9 is the winding diagram with push-button auto-transformer starter.
Figure 10 is the winding diagram that carries out the operation of star starting triangle with two contactors of button control.
Figure 11 carries out the triangle starting with two contactors of button control, the winding diagram of double star operation.
Figure 12 carries out the extend-triangle starting with three contactors of button control, the winding diagram of triangle operation.
Horizontal machine with B-class insulation is that example further specifies its principle in conjunction with the accompanying drawings below.
With reference to Fig. 2, three thermistor (R
T1, R
T2, R
T3) an end by resistance (R
1) and voltage-stabiliser tube (D
w) 7.5 volts of positive voltages of supply, three thermistor (R
T1, R
T2, R
T3) the hot signal of detected motor three phase windings is become electric signal deliver to electronic switching circuit (IC respectively
1) the 1st, 4,11 pin of CD4066.By the secondary 50H that gets of power transformer
z18V is through resistance (R
2) input counting circuit (IC
2) CL of CD4017 holds the 14th pin, counting circuit (IC
2) counting, its 2nd, 3,4 pin is respectively with 50/3H
zFrequency export high level control electronic switching circuit (IC in turn
1) control end the 5th, 12,13 pin, electronic switching circuit (IC
1) three thermistor (R
T1, R
T2, R
T3) signal sent here by the 2nd, 3,10 pin alternatelies periodically through resistance (R
3) deliver to display driving integrated circuit (IC
3) input the 16th pin of TA7666.TA7666 is two 5 demonstrations, connects one 3.3 kilo-ohms resistance (R between its two inputs the 16th pin and the 1st pin
4) just become single 10 demonstrations.Display driving integrated circuit (IC
3) 10 output pins drive 10 grades of demonstrations that 10 luminous tubes are finished motor winding temperature rise respectively.When the three-phase of motor or when wherein a phase winding temperature rises to 80 ℃, display driving integrated circuit (IC
3) the 10th pin output low level, luminous tube (D
1) bright, when temperature rises to 85 ℃, the 11st pin output low level, luminous tube (D
2) bright.Along with the rising of motor windings temperature, the shinny number of elements of luminous tube also increases thereupon successively.Along with the motor windings decrease of temperature, the shinny number of elements of luminous tube also reduces thereupon successively.When the motor windings temperature rises to 120 ℃, display driving integrated circuit (IC
3) the 4th pin output low level, luminous tube (D
9) bright, while triode (T
1) saturation conduction, reporting to the police drives relay (J
1) adhesive, drive high temperature alarm and report to the police, when temperature rises to 130 ℃, (IC
3) the 3rd pin output low level, luminous tube (D
10) bright, simultaneously, (IC
3) low level of the 3rd pin output triggers bistable circuit (A) upset, bistable circuit (A) output low level, this low level is through resistance (R
17) feed back to input, even at this moment trigger signals disappears, input still can maintain low level state, bistable circuit still can keep output low level, luminous tube (D
11) bright, demonstrate overheating fault, simultaneously triode (T
4) because of base stage step-down level ends, operate as normal shows luminous tube (D
17) extinguish, shutdown simultaneously drives relay (J
2) discharge, drive the pass machine mechanism and shut down automatically, realize protection to motor.
Six bistable circuits (A, B, C, D, E, F) are by six non-inverting buffers (as CD4050) and six resistance (R
17, R
18, R
19, R
20, R
21, R
22) form respectively.Six capacitor (C
2, C
3, C
4, C
5, C
6, C
7) effect be to trigger six bistable circuits respectively in this power on circuitry moment all to export high level, play anti-interference effect simultaneously.Six luminous tube (D
11, D
12, D
13, D
14, D
15, D
16) decapacitation demonstrates respectively outside six kinds of faults, can also play the effect of diode gate circuit.
Fig. 3, Fig. 4 are stators and rotor tribological failure detector arrangement and installation site schematic diagram mutually.This detector has a metal bougie (1), and metal bougie available copper or aluminium are made.Be loaded on motor stator notch (2), and parallel with notch, its length is longer slightly than stator iron stamen (3) length, and metal bougie (1) exceeds (3) 0.05 millimeters of stator iron stamens, and two of metal bougie (1) and bottom surface are filled with insulating resin and be fixed in the notch.Bistable circuit (B) trigger end of one termination of metal bougie (1) leaded (4) and Fig. 2 joins, when eccentric displacement takes place in rotor (5), before rubbing with notch iron stamen (3), at first touch mutually with metal bougie (1), because rotor (5) joins with power-, so bistable circuit (B) is subjected to negative electricity to trigger upset (see figure 2) luminous tube (D
12) bright, demonstrate tribological failure, simultaneously triode (T
4) because of base stage step-down level ends, shutdown drives relay (J
2) discharge, realize shutdown automatically.
With reference to Fig. 2, detection of electrical leakage triode (T
2) emitter connects motor casing, also is circuit ground, base stage is through resistance (R
24) connecing the earth, collector electrode connects the trigger end of bistable circuit (C).Electric leakage is through motor casing, triode (T when electric leakage takes place motor
2) emitter, base stage and resistance (R
24) the inflow the earth.When leakage current reaches certain value, (resistance value of the earth being decided), triode (T on motor casing
2) collector electrode trigger bistable circuit (C) upset, luminous tube (D
13) bright, demonstrate leak current fault, simultaneously triode (T
4) because of base stage step-down level ends, shutdown drives relay (J
2) discharge, realize shutdown automatically.Experiment shows, when the protector operating voltage is got 12 volts, triode (T
2) current amplification factor be 200 times, base resistance (R
24) when being 10 Europe, motor case is to the resistance value of the earth, the protector ground wire is to the ground resistance value and can make the minimum leakage current value three's of bistable circuit (C) upset relation such as following table:
| Motor case is to ground resistance value (Europe) | The protector ground wire is to ground resistance value (Europe) | Can make the minimum leakage current value (milliampere) of bistable circuit (C) upset |
| Infinitely great | ????100 | ?????2.2 |
| ????100 | ????100 | ?????8 |
| ????50 | ????100 | ?????15 |
| ????10 | ?????50 | ?????50 |
Even motor casing (M) is to the resistance value of the earth hour as can be seen from the above table, (be steelframe and imbed that the leakage current major part flows into the earth from support in the ground as support, shown in Fig. 2 dotted line), motor also can be protected.Diode (D
19, D
20) be in order to protect triode (T
2) establish, when leakage current was big, most electric currents were through diode (D
19, D
20) the inflow the earth, diode (D
19, D
20) with the voltage clamping between circuit ground and the earth in below 1 volt, thereby protected triode (T
2), experiment shows: triode (T
2) get 2SC8050 (0.8W), diode is got 3 peace rectifying tubes; When motor casing to the ground resistance infinity, when the protector ground wire was 5 Europe to the ground resistance value, (live wire) repeatedly directly received with heavy gauge wire and done simulation electric leakage on the casing on a binding post of motor, the unused time is 0.1 second, triode (T
2), diode (D
19, D
20) all do not damage.
Fig. 5 is the humidity sensor structure chart.
Fig. 6 is a humidity sensor installation site schematic diagram.
Humidity sensor (6) is inside and outside two electrodes that become with stainless steel or copper, wherein in electrode be that diameter is 5 to 10 millimeters a tubular, put glass fabric at the pipe skin, again on the glass fabric around on stainless steel wire or copper wire make external electrode.This humidity sensor is installed in lowest part in the motor, and external electrode connects motor casing (also being circuit ground), and interior electrode connects bistable circuit (D) trigger end.Resistance value between the humidity sensor internal and external electrode reduces with the increase of humidity, triggers bistable circuit (D) upset when humidity sensor two interelectrode resistances are 13 kilo-ohms when humidity reaches certain value in the motor, luminous tube (D
14) bright, showed wet fault, simultaneously triode (T
4) because of base stage step-down level ends, shutdown drives relay (J
2) discharge, realize shutdown automatically.Because of the cleannes difference in each motor, so the effect of making moist is also different, humidity sensor should be divided into four kinds of specifications, can be that 95%, 96%, 97%, 98% o'clock resistance value is 13 kilo-ohms in relative humidity respectively, so that different motor uses.
When motor generation short circuit in winding, generally all electric spark can take place, photosensitive tube (T
Light) be subjected to electric spark radiation (see figure 2), its collector electrode output low level to trigger bistable circuit (E) upset, luminous tube (D
15) bright, demonstrate short trouble, simultaneously triode (T
4) because of base stage step-down level ends, shutdown drives relay (J
2) discharge, realize shutdown automatically.
The phase failure detects resistance (R
25, R
26, R
27) each end join with three live wires at motor down-lead place respectively, the other end is connected together becomes star, neutral point is connected to triode (T
3) base stage.When the serious imbalance of the phase failure or three-phase voltage takes place when, neutral point voltage rising triode (T
3) conducting and trigger bistable circuit (F) upset, luminous tube (D
16) bright, demonstrate open phase fault, simultaneously triode (T
4) because of base stage step-down level ends, shutdown drives relay (J
2) discharge, realize shutdown automatically.
Fig. 7 is the winding diagram that carries out direct-on-line starting with the button control contactor.When clicking starting button (QA), 380 volts of alternating currents drive relay (J by shutdown
2) normally opened contact be rectified into the sucking coil that direct current is supplied with contactor (QC) through rectifier bridge (DA) again, the main contacts rapid closing of contactor (QC) is connected the power supply of motor, electric motor starting begins.After starting button (QA) resets, by the main contacts (also can be auxiliary contact) of contactor (QC) through capacitor (C
8) be rectified into the sucking coil that low-voltage DC is supplied with contactor (QC) through rectifier bridge (DA) again after the step-down, make contactor keep adhesive, the motor normal operation input.When motor occurs when unusual, because the effect of protector, shutdown drives relay (J
2) normally opened contact discharge to disconnect, the sucking coil dead electricity of contactor (QC), its main contacts discharges and cuts off motor power, realizes shutdown protection automatically.
Fig. 8 is the winding diagram with lever operated auto-transformer starter.The electric motor starting handle that finishes is dialled when run location, and the iron stamen of sucking coil is subjected to mechanical force and closure is moved contact (SC) closure simultaneously, this moment capacitor (C
8) driving relay (J by shutdown after 380 volts of alternating current step-downs
2) normally opened contact be rectified into low-voltage direct through rectifier bridge (DA) again, supply with the sucking coil (SC) keep the closing of contact, make operation contact (SC) keep closure, motor normally moves.When motor occurs when unusual, shutdown drives relay (J
2) normally opened contact discharge to disconnect, drive and close the machine mechanism shutdown, motor is protected.
Fig. 9 is the winding diagram with the push-botton operation auto-transformer starter.When clicking starting button (QA), 380 volts of alternating currents drive relay (J by shutdown
2) normally opened contact be rectified into the sucking coil that direct current is supplied with starting contactor (QC) through rectifier bridge (DA) again, the main contacts rapid closing of starting contactor (QC), power supply starts through self-coupling decompression device (ZBQ) decompression back supply motor.When pressing starting button (QA), the operation contactor (SC) because of the sucking coil loop is disconnected can not adhesive.After starting button (QA) resetted, the loop of operation contactor (SC) sucking coil recovered again to connect, but because electric capacity (C
8) hypotensive effect, rectifier bridge (DA) output low-voltage DC, operation contactor (SC) still can not adhesive, treat that starting finishes need only click in the time of need entering normal operation and move button (SA), rectifier bridge this moment (DA) output total head direct current makes the adhesive of operation contactor (SC), before its main contacts does not have closure, its normally closed auxiliary contact disconnects earlier, cut off the loop of starting contactor (QC) sucking coil, starting contactor (QC) sucking coil dead electricity, its main contacts discharge and disconnect, and power supply and motor all break away from self-coupling decompression device (ZBQ), it is closed fully to move contactor (SC) main contacts then, and motor connects full voltage and normally moves.After operation button (SA) resetted, power supply was through capacitor (C
8) be rectified into low-voltage DC through rectifier bridge (DA) again after the step-down and supply with operation contactor (SC) sucking coil, make it keep adhesive, motor keeps normal operation.When motor occurs when unusual, because the effect of protective circuit, shutdown drives relay (J
2) normally opened contact discharge to disconnect, the main contacts of contactor (SC) discharges and cuts off motor power, realizes shutdown protection automatically.
Figure 10 is the winding diagram that carries out the operation of star starting triangle with two contactors of button control.When clicking starting button (QA), starting contactor (QC) adhesive, make lead-out wire (1,2,3) the termination energize of motor, this moment motor star starting, treat that starting finishes need only click operation button (SA), the adhesive of operation contactor (SC), its three normally-closed contacts disconnect, motor lead-out wire (4,5,6) end is separated from each other, receives respectively on the power supply by its normally opened contact then, make motor normal operation triangular in shape.When motor occurs when unusual, shutdown drives relay (J
2) normally opened contact release disconnection, the sucking coil of two contactors (QC, SC) is dead electricity simultaneously, and their main contacts discharges, and realizes shutting down automatically.
Figure 11 carries out the triangle starting with two contactors of button control, the winding diagram of double star operation. when pressing starting button (QA), starting contactor (QC) adhesive, the lead-out wire (4 of motor, 5,6) end joins by three normally opened contacts and the power supply of starting contactor (QC) respectively, make the starting of motor triangularity, treat to click operation button (SA) after starting finishes, the adhesive of operation contactor (SC), before its main contacts does not have closure, its normally closed auxiliary contact disconnects earlier, and starting contactor (QC) discharges, and its normally closed main contacts resets, it is closed fully to move contactor (SC) main contacts then, and motor is the double star operation.When motor occurs when unusual, shutdown drives relay (J
2) normally opened contact discharge, the main contacts of operation contactor (SC) discharges, and realizes shutdown automatically.
Figure 12 carries out the extend-triangle starting with three contactors of button control, the winding diagram of triangle operation, when pressing starting button (QA), starting contactor (1QC, 2QC) adhesive simultaneously, make motor lead-out wire (1,2,3) end joins with power supply respectively, (4,5,6) end is respectively with (8,9,7) end joins, motor becomes the extend-triangle starting, treating that starting finishes need only click operation button (SA) operation contactor (SC) adhesive, its normally closed auxiliary contact at first disconnects, starting contactor (2QC) discharges, motor lead-out wire (4,5,6) end is respectively with (8,9,7) end disconnects, the main contacts that moves contactor (SC) then is closed fully, motor normal operation triangular in shape.When motor occurs when unusual, shutdown drives relay (J
2) discharge, contactor (1QC, SC) all discharges, and realizes shutdown automatically.
Under typical applicable cases, each resistance is as follows:
R
1Be 1 kilo-ohm, R
2Be 680 kilo-ohms, R
3Be 910 Europe, (R
3Resistance be according to three temperature-sensitive pipes or thermistor model, specification and through voltage-stabiliser tube D
wMagnitude of voltage after the voltage stabilizing and decide), R
4Be 3.3 kilo-ohms, R
5, R
6Respectively be 43 kilo-ohms, R
7To R
15Respectively be 1 kilo-ohm, R
16Be 2.4 kilo-ohms, R
17To R
22Respectively be 10 kilo-ohms, R
23Be 3.3 kilo-ohms, R
24Be 10 Europe, as triode T
3Current amplification factor when being 200 times, R
25To R
27Respectively be 5.6 megaohms, R
28It is 30 kilo-ohms.
Under typical applicable cases, each condenser capacity is as follows:
C
1Be 4.7 microfarads, C
2To C
5Respectively be 68 microfarads, C
6Be 4.7 microfarads, C
7Be 68 microfarads, C
8Be 0.22 to 1 microfarad (on deciding) with 380 volts or 220 volts of voltage or sucking coil power.
Claims (7)
1, a kind of full-function protector for electric machine is handled amplification by power supply, fault detect, signal and is started the shutdown driving mechanism and form, and it is characterized in that:
A, three thermistors (or temperature-sensitive pipe) respectively have an end to be connected to by resistance (R
1) and voltage-stabiliser tube (D
w) the 7.5V positive electricity supplied with, the other end respectively with electronic switching circuit (IC
1) three input pins the 1st, 4,11 pin join electronic switching circuit (IC
1) control pin the 5th, 12,13 pin and counting circuit (IC
2) the 2nd, 3,4 pin join, (CL) of counting circuit end the 14th pin is through resistance (R
2) join electronic switching circuit (IC with power transformer is secondary
1) output the 2nd, 3,10 pin all through resistance and display driving integrated circuit (TC
3) input pin join display driving integrated circuit (IC
3) 10 output pins join luminous tube (D through resistance and 10 luminous tubes that show motor winding temperature rise respectively
9) with the triode (T of high temperature alarm drive circuit
1) base stage join triode (T
1) collector electrode and high temperature alarm drive relay (J
1) coil join relay (J
1) other end connection circuit ground (negative supply) of coil, triode (T
1) emitter connects positive supply;
B, six bistable circuits (A, B, C, D, E, F) are by six resistance (R
17, R
18, R
19, R
20, R
21, R
22) input/output terminal that is connected to six non-inverting buffers respectively forms, and is connected to six capacitors (C2, C3, C4, C5, C6, C7) respectively between six trigger ends of six bistable circuits (A, B, C, D, E, F) and the positive supply;
Six trigger ends of C, six bistable circuits (A, B, C, D, E, F) respectively with luminous tube (D
10) negative pole, the lead-in wire (4) of metal bougie (1), detection of electrical leakage triode (T
2) collector electrode, the interior electrode of humidity sensor (6), two photosensitive tube (T
Light) collector electrode, phase failure detection transistor (T
3) collector electrode be connected respectively;
D, show luminous tube (D by six faults
11, D
12, D
13, D
14, D
15, D
16) diode gate circuit formed, its six inputs join the output of diode gate circuit and triode (T respectively with each outputs of six bistable circuits (A, B, C, D, E, F) respectively
4) base stage joins triode (T
4) emitter and operate as normal show luminous tube (D
17) negative pole join luminous tube (D
17) anodal connection circuit ground, triode (T
4) collector electrode connects shutdown and drive relay (J
2) coil, another termination power of coil is just;
E, shutdown drive relay (J
2) normally opened contact is serially connected with between the input of 38O volt or 220 volts of power supplys and rectifier bridge (DA);
F, decompression capacitor (C
8) be connected in parallel with the normally opened contact that moves button (SA), be connected in parallel with starting button (QA) normally opened contact simultaneously, perhaps the normally opened contact through the normally opened contact of contactor (QC) (main contacts or auxiliary contact all can) and starting button (QA) is connected in parallel decompression capacitor (C
8) be serially connected with between an input of rectifier bridge (DA) and 380 volts or the 220 volts of power supplys;
The sucking coil of the output of G, rectifier bridge (DA) and contactor (SC) is connected in parallel, perhaps be connected in parallel through the normally-closed contact of starting button (QA) and the sucking coil of contactor (SC), sucking coil with contactor (QC) is connected in parallel simultaneously, perhaps is connected in parallel through the normally closed auxiliary contact of contactor (SC) and the sucking coil of contactor (QC);
The casing of H, circuit ground and motor (M) joins.
2, full-function protector for electric machine according to claim 1; it is characterized in that metal bougie (1) is to make with copper or aluminium; and it is longer slightly than stator iron stamen length fixedly to be loaded on its length of stator iron stamen notch (2) with insulating resin, exceeds (3) 0.05 millimeters of notch both sides iron stamens.
3, full-function protector for electric machine according to claim 1 is characterized in that detection of electrical leakage triode (T
2) emitter connection circuit ground, base stage is through resistance (R
24) and ground wire connect the earth, shunt diode (D
19) positive pole, (D
20) negative pole be connected to resistance (R
24) with the contact of ground wire on, diode (D
19) negative pole, (D
20) positive pole all be connected to circuit ground.
4, full-function protector for electric machine according to claim 1 is characterized in that the external electrode connection circuit ground of humidity sensor (6).
5, full-function protector for electric machine according to claim 1 is characterized in that two photosensitive tubes are loaded on respectively in the two end cap of motor (M), the equal connection circuit of their emitter ground.
6, full-function protector for electric machine according to claim 1 is characterized in that phase failure detection transistor (T
3) emitter connection circuit ground, base stage is connected to by resistance (R
25, R
26, R
27) on the neutral point of the star connection formed, resistance (R
28) one be terminated at triode (T
3) base stage, the other end is connected to the earth.
7,, it is characterized in that humidity sensor (6) is to become with stainless steel or copper, and its inside and outside two electrode insulations are separated by with glass fabric according to claim 1 or 4 described full-function protector for electric machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94118614A CN1034618C (en) | 1994-03-31 | 1994-12-17 | Full-function protector for electric machine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94103684.7 | 1994-03-31 | ||
| CN94103684 | 1994-03-31 | ||
| CN94118614A CN1034618C (en) | 1994-03-31 | 1994-12-17 | Full-function protector for electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1117213A true CN1117213A (en) | 1996-02-21 |
| CN1034618C CN1034618C (en) | 1997-04-16 |
Family
ID=25743396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94118614A Expired - Fee Related CN1034618C (en) | 1994-03-31 | 1994-12-17 | Full-function protector for electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1034618C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040382C (en) * | 1996-07-18 | 1998-10-21 | 廖德 | Self-protective motor |
| CN102208887A (en) * | 2011-04-28 | 2011-10-05 | 上海电机系统节能工程技术研究中心有限公司 | Method for reducing starting current of side push three-phase asynchronous motor used in large power ship |
| CN109973227A (en) * | 2019-04-18 | 2019-07-05 | 江西科技师范大学 | A kind of electric machine rotor touches the shutdown protector to rub |
| CN115220507A (en) * | 2022-09-21 | 2022-10-21 | 山西万家寨水控水利机电科技服务有限公司 | Novel integrated motor with leakage protection device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100454750C (en) * | 2005-01-31 | 2009-01-21 | 台达电子工业股份有限公司 | DC brush-less motor driving device without hull assembly |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2144362Y (en) * | 1992-08-05 | 1993-10-20 | 徐有韬 | Integrated protector for ac motor |
| CN2165557Y (en) * | 1993-10-14 | 1994-05-18 | 鲁诏群 | Multifunctional protector for motor |
-
1994
- 1994-12-17 CN CN94118614A patent/CN1034618C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040382C (en) * | 1996-07-18 | 1998-10-21 | 廖德 | Self-protective motor |
| CN102208887A (en) * | 2011-04-28 | 2011-10-05 | 上海电机系统节能工程技术研究中心有限公司 | Method for reducing starting current of side push three-phase asynchronous motor used in large power ship |
| CN109973227A (en) * | 2019-04-18 | 2019-07-05 | 江西科技师范大学 | A kind of electric machine rotor touches the shutdown protector to rub |
| CN115220507A (en) * | 2022-09-21 | 2022-10-21 | 山西万家寨水控水利机电科技服务有限公司 | Novel integrated motor with leakage protection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1034618C (en) | 1997-04-16 |
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