CN204633646U - A kind of disintegrating machine threephase asynchronous machine soft starting device - Google Patents
A kind of disintegrating machine threephase asynchronous machine soft starting device Download PDFInfo
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- CN204633646U CN204633646U CN201520354686.4U CN201520354686U CN204633646U CN 204633646 U CN204633646 U CN 204633646U CN 201520354686 U CN201520354686 U CN 201520354686U CN 204633646 U CN204633646 U CN 204633646U
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- threephase asynchronous
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- asynchronous machine
- soft initiator
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Abstract
The utility model discloses a kind of disintegrating machine threephase asynchronous machine soft starting device, comprise threephase asynchronous machine, soft initiator, major loop, control loop, the power input terminal of described soft initiator is connected with the power end of major loop, threephase asynchronous machine is connected to the power output terminal of soft initiator, major loop is in parallel and be connected with threephase asynchronous machine by switching device and soft initiator, control loop and soft initiator start, stop being connected to realize starting with fault terminal, stop controlling and fault alarm, the contactor of control loop is connected with the switching device of major loop.The utility model is by controlling the angle of flow of thyristor; electric moter voltage is made slowly to rise to rated voltage by zero; starting current in start-up course is by traditional linear ascending current of overload impact ER effect; start overall process and there is not impact torque; improved the operating efficiency of disintegrating machine, have structure simple, protect complete, use feature reliable, easy to maintenance, simple to operate.
Description
Technical field
The utility model belongs to motor drag technical field, relate to a kind of structure simple, protect complete, use disintegrating machine threephase asynchronous machine soft starting device reliable, easy to maintenance, simple to operate.
Background technology
The control system of disintegrating machine threephase asynchronous is due to longevity of service, working temperature is high, dust is large, work under bad environment, the direct startup that prior art uses, auto-type transformer reduced-voltage starting (Fig. 1), star-angular transformation decompression starting, but it is excessive that the multiple Starting mode of motor does not all fundamentally solve the electric current occurred in motor start-up procedure, work long hours and easily cause electric equipment aging circuit, electrical equipment problem takes place frequently, poor reliability, and it is large to the impact of electrical network, have impact on grid supply quality, larger to transformer margin requirement.In addition, because the equal bringing onto load of every task starts, plant equipment is impacted large, motor-driven and motor keyway, motor shaft wear and tear very serious, easily cause mechanical breakdown, thus frequently occur that breach beaten by keyway, keyway rounding skids and the levigate phenomenon of shaft diameter, cause bearing damage, gear failure, burn-down of electric motor, change with maintenance work heavy and the time is long, reduce the useful life of equipment, have a strong impact on normal production.Due to soft start, to have electric motor starting level and smooth, impacts less or without impact, and can reduce starting current, thus avoid startup overcurrent and trip.But; soft starting device ubiquity of the prior art protects incomplete problem; and peripheral control loop is complicated or soft initiator is with high costs to protect more comprehensive soft starting device to exist, safeguards complicated, be difficult to the harsh environments problem adapting to such as disintegrating machine threephase asynchronous.
Summary of the invention
The purpose of this utility model be to provide a kind of structure simple, protect complete, use disintegrating machine threephase asynchronous machine soft starting device reliable, easy to maintenance, simple to operate.
The purpose of this utility model realizes like this, comprise threephase asynchronous machine, soft initiator, major loop, control loop, the power input terminal of described soft initiator is connected with the power end of major loop, described threephase asynchronous machine is connected to the power output terminal of soft initiator, described major loop is in parallel and be connected with threephase asynchronous machine by switching device and soft initiator, described control loop and soft initiator start, stop being connected to realize starting with fault terminal, stop controlling and fault alarm, the contactor of described control loop is connected with the switching device of major loop.
The utility model controls the angle of flow of thyristor in soft initiator according to the starting characteristic of disintegrating machine threephase asynchronous, when making motor start-up, voltage increases gradually, starting current rises to set point from zero linear, until the full conducting of thyristor, motor is operated in rated voltage, to realize level and smooth startup, reduces starting current and torque shock ends, avoid starting overcurrent tripping and mechanical wear, improve disintegrating machine operating efficiency.When motor reaches rated speed, soft initiator replaces the thyristor of having finished the work from employing bypass contactor, provides rated voltage for motor runs well, and to reduce thyristor thermal losses, prolongation soft initiator useful life, makes again electrical network avoid harmonic pollution.By the simple electrical connection of major loop, control loop and soft initiator; realize starting, stop and the interlock of fault and display; the peripheral circuit of soft initiator can be simplified, be beneficial to reduce electric fault rate and maintenance difficulties, complete defencive function can be provided again.Therefore, the utility model have structure simple, protect complete, use feature reliable, easy to maintenance, simple to operate.
Accompanying drawing explanation
Fig. 1 is auto-type transformer reduced-voltage starting schematic diagram of the prior art;
Fig. 2 is the utility model schematic diagram;
In figure: 1-threephase asynchronous machine, 2-soft initiator, 3-major loop, 41-start and stop unit, 42-Bypass control unit, 43-runs indicating member, and 44-stops indicating member, 45-faulty indication unit.
Embodiment
Be further described the utility model below in conjunction with accompanying drawing, but must not be limited the utility model by any way, any change done based on the utility model training centre or improvement, all belong to protection range of the present utility model.
As shown in Figure 2, the utility model comprises threephase asynchronous machine 1, soft initiator 2, major loop 3, control loop 4, the power input terminal of described soft initiator 2 is connected with the power end of major loop 3, described threephase asynchronous machine 1 is connected to the power output terminal of soft initiator 2, described major loop 3 is in parallel and be connected with threephase asynchronous machine 1 by switching device and soft initiator 2, described control loop 4 starts with soft initiator 2, stop being connected to realize starting with fault terminal, stop controlling and fault alarm, the contactor of described control loop is connected with the switching device of major loop.Described major loop 3 is in parallel with soft initiator 2 and be connected with threephase asynchronous machine 1 by contactor KM and thermal relay FR.
Described control loop 4 comprises start and stop unit 41, Bypass control unit 42, run indicating member 43, stop indicating member 44, faulty indication unit 45, described start and stop unit 41 passes through the startup of contactor KA and soft initiator 2, stop terminal connecting and be connected with stopping indicating member 44, described Bypass control unit 42 be connected with the starting state terminal of soft initiator 2 and pass through contactor JC respectively with operation indicating member 43, indicating member 44 is stopped to connect, described operation indicating member 43 is connected with major loop 3 by contactor KM, described faulty indication unit 45 is connected with the malfunction terminal of soft initiator 2 and is connected with start and stop unit 41 by contactor AR.
Described start and stop unit 41 is in parallel respectively by starting switch SB1 and contactor KA normally opened contact, then through stopping the series connection of the normally-closed contact of switch S B2 and thermal relay FR and contactor AR to realize starting or stoping with control contactor KA.
Realize starting or stoping the output of signal by completing terminal with soft initiator 2 start and stop with connecting of contactor JC in described Bypass control unit 42.
Described operation indicating member 43 is realized threephase asynchronous normally run instruction by connecting of contactor JC normally opened contact and indicating device, realizes the output of threephase asynchronous normal operation signal by contactor JC normally opened contact with connecting of contactor KM.
Described stopping indicating member 44 is by the normally-closed contact tandem drive indicating device of contactor KA and contactor JC.
Described faulty indication unit 45 is connected with contactor AR and indicating device with after the parallel connection of thermal relay FR normally opened contact respectively by the malfunction terminal of soft initiator 2.
Described major loop 3 power end is provided with voltmeter PV, and described major loop 3 and soft initiator 2 are connected in parallel between threephase asynchronous machine 1 input terminal and are provided with ammeter PA.
utility model works principle and the course of work:
The utility model is according to the starting characteristic of disintegrating machine threephase asynchronous and loading condition and electric grid relay protection characteristic, and by controlling the angle of flow of thyristor in soft initiator, freely stepless speed regulation is to optimum start electric current.During actuating motor, the output voltage of thyristor increases gradually, motor accelerates gradually, starting current rises to set point from zero linear, until the full conducting of thyristor, motor is operated in rated voltage, realize level and smooth startup, reduce starting current and torque shock ends, avoid starting overcurrent tripping and mechanical wear, improved the operating efficiency of disintegrating machine.When motor reaches rated speed, start-up course terminates, soft initiator replaces the thyristor of having finished the work from employing bypass contactor, rated voltage is provided for motor runs well, to reduce the thermal losses of thyristor, extend the useful life of soft initiator, improve its operating efficiency, make again electrical network avoid harmonic pollution.By the simple electrical connection of major loop, control loop and soft initiator; realize soft start, soft stop only and the interlock of fault and display; the peripheral circuit of soft initiator can be simplified, be beneficial to reduce electric fault rate and maintenance difficulties, complete protective capability can be provided again.The particularly Thermal protection of start and stop unit and the dual chain control of fault in control loop, can improve the protective capability of soft initiator and threephase asynchronous, be conducive to the reliability improving whole crusher system.In addition, by the connection of bypass control circuit and faulty indication unit and soft initiator corresponding signal terminal and corresponding contactor of connecting, the comparatively easy soft initiator that realizes is to the soft start of threephase asynchronous, stopping or Fault Control.Therefore, the utility model have structure simple, protect complete, use feature reliable, easy to maintenance, simple to operate.
As shown in Figure 2, the air switch QF that first closes connects three phase mains, and soft initiator 2 starts; Secondly the start button SB1 of start and stop unit 41 in control loop 4 is pressed, A.C. contactor KA coil electricity adhesive self-locking, its normally opened contact KA closes, soft initiator 2 obtains the angle of flow that enabling signal starts to control its inner thyristor, threephase asynchronous machine 1 input voltage is made to increase gradually from zero with preset function relation, until proceed-to-send also stops to threephase asynchronous machine 1 output current, while motor 1 starts, the normally-closed contact of contactor KA disconnects and stops indicator light HR to extinguish; Soft initiator 2 controls while threephase asynchronous machine 1 started, complete terminal K22, K24 output signal by start and stop and make the adhesive of contactor JC coil electricity, and closed to drive run indicator HG to light and to make contactor KM coil electricity inhale by contactor JC normally opened contact, in major loop 3, the closed threephase asynchronous machine 1 that makes of normally opened contact KM obtains electric operation; In parallel by fault-signal terminal K12, K14 of soft initiator 2 and the thermal relay FR of major loop 3, drives contactor AR coil break-make and malfunction indicator lamp HY to extinguish, and control soft start with this, whether stopped process promptly terminates; During for stopping, can by the stop button SB2 of the start and stop unit 41 of control loop 4, make A.C. contactor KA coil losing electricity, soft initiator 2 is made to obtain stop signal, reduce voltage gradually or the direct stop signal that exports makes contactor KM coil losing electricity and disconnects major loop 3 and power on the contrary with startup, thus complete stopped process; The overload protection of threephase asynchronous 1 is completed by thermal relay FR.
Claims (7)
1. a disintegrating machine threephase asynchronous machine soft starting device, it is characterized in that comprising threephase asynchronous machine (1), soft initiator (2), major loop (3), control loop (4), the power input terminal of described soft initiator (2) is connected with the power end of major loop (3), described threephase asynchronous machine (1) is connected to the power output terminal of soft initiator (2), described major loop (3) is in parallel and be connected with threephase asynchronous machine (1) by switching device and soft initiator (2), described control loop (4) and soft initiator (2) start, stop being connected to realize starting with fault terminal, stop controlling and fault alarm, the contactor of described control loop (4) is connected with the switching device of major loop (3).
2. disintegrating machine threephase asynchronous machine soft starting device according to claim 1, is characterized in that described major loop (3) is in parallel with soft initiator (2) and be connected with threephase asynchronous machine (1) by contactor KM and thermal relay FR.
3. disintegrating machine threephase asynchronous machine soft starting device according to claim 2, it is characterized in that described control loop (4) comprises start and stop unit (41), Bypass control unit (42), run indicating member (43), stop indicating member (44), faulty indication unit (45), described start and stop unit (41) is by the startup of contactor KA and soft initiator (2), stop terminal connecting and be connected with stopping indicating member (44), described Bypass control unit (42) be connected with the starting state terminal of soft initiator (2) and pass through contactor JC respectively with operation indicating member (43), indicating member (44) is stopped to connect, described operation indicating member (43) is connected with major loop (3) by contactor KM, described faulty indication unit (45) is connected with the malfunction terminal of soft initiator (2) and is connected with start and stop unit (41) by contactor AR.
4. disintegrating machine threephase asynchronous machine soft starting device according to claim 3, it is characterized in that in parallel respectively by starting switch SB1 and contactor KA normally opened contact of described start and stop unit (41), then through stopping the series connection of the normally-closed contact of switch S B2 and thermal relay FR and contactor AR to realize starting or stoping with control contactor KA.
5. the disintegrating machine threephase asynchronous machine soft starting device according to claim 3 or 4, is characterized in that the normally-closed contact tandem drive indicating device of described stopping indicating member (44) by contactor KA and contactor JC.
6. the disintegrating machine threephase asynchronous machine soft starting device according to claim 3 or 4, is characterized in that described faulty indication unit (45) is connected with contactor AR and indicating device with after the parallel connection of thermal relay FR normally opened contact respectively by the malfunction terminal of soft initiator (2).
7. disintegrating machine threephase asynchronous machine soft starting device according to claim 1, it is characterized in that described major loop (3) power end is provided with voltmeter PV, described major loop (3) and soft initiator (2) are connected in parallel between threephase asynchronous machine (1) input terminal and are provided with ammeter PA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520354686.4U CN204633646U (en) | 2015-05-28 | 2015-05-28 | A kind of disintegrating machine threephase asynchronous machine soft starting device |
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| CN201520354686.4U CN204633646U (en) | 2015-05-28 | 2015-05-28 | A kind of disintegrating machine threephase asynchronous machine soft starting device |
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| CN204633646U true CN204633646U (en) | 2015-09-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108494290A (en) * | 2018-05-23 | 2018-09-04 | 开滦（集团）有限责任公司电信分公司 | The direct start and stop secondary circuit control device of three-phase squirrel-cage induction motor |
| CN109066589A (en) * | 2017-06-13 | 2018-12-21 | 乐山加兴科技有限公司 | A kind of circuit for controlling motor |
-
2015
- 2015-05-28 CN CN201520354686.4U patent/CN204633646U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066589A (en) * | 2017-06-13 | 2018-12-21 | 乐山加兴科技有限公司 | A kind of circuit for controlling motor |
| CN108494290A (en) * | 2018-05-23 | 2018-09-04 | 开滦（集团）有限责任公司电信分公司 | The direct start and stop secondary circuit control device of three-phase squirrel-cage induction motor |
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