CN104660111A - Two-for-many redundant soft-starting system for motor - Google Patents
Two-for-many redundant soft-starting system for motor Download PDFInfo
- Publication number
- CN104660111A CN104660111A CN201510072399.9A CN201510072399A CN104660111A CN 104660111 A CN104660111 A CN 104660111A CN 201510072399 A CN201510072399 A CN 201510072399A CN 104660111 A CN104660111 A CN 104660111A
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- China
- Prior art keywords
- soft
- starter
- contactor
- motor
- soft starter
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/54—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting two or more dynamo-electric motors
Abstract
The invention discloses a two-for-many redundant soft-starting system for a motor. A conventional power network of the system is connected with a first quick fuse and a second quick fuse through a first circuit breaker and a second circuit breaker respectively; the first and second quick fuses are connected with a first soft starter and a second soft starter respectively; the outgoing line terminals of the first and second soft starters are connected in parallel to form a soft-starting power network which is connected with a plurality of motors; a soft-starting contactor is connected between each motor and the soft-starting power network; the conventional power network is connected between each motor and each soft-starting contactor through a bypass contactor; the first soft starter, the second soft starter, each soft-starting contactor and each bypass contactor are connected with a controller respectively. According to the two-for-many redundant soft-starting system, the reliability and continuous operation performance of a production control system are improved greatly, moreover, the service life of the soft starters is prolonged, and the maintainability of the soft starting system is improved.
Description
Technical field
The invention belongs to motor control technologies field, be specifically related to a kind of two and drag many redundance types flexible starter for electric motor system.
Background technology
Threephase asynchronous can produce very large starting current when directly starting, and according to different loads and motor configuration, starting current can reach 5 ~ 9 times of specified running current.So large starting current meeting serious impact electrical network, affects equipment life and increases extra power transmission and distribution investment.Adopt soft starter actuating motor, can control and reduce starting current, avoiding above-mentioned harmful effect.
A soft starter is generally adopted now to start one (being commonly called as one-to-one pattern) or multiple motors of starting by sequence (be commonly called as and drag multi-mode).This application mode is no doubt feasible, and obtains application in a lot of occasion.But in some industries (as oil, coal, chemical industry etc.), have higher reliability and continuity requirement to soft start-up process, the soft starter in view of any producer can not be all 100% reliable, therefore in use there is certain hidden danger.Especially drag the Soft Starting System under many application modes for one, the fault that this hidden danger is brought will be more serious.Just in case soft starter breaks down, the multiple motors so in whole production line all cannot start, and whole production line may be made time serious normally to run.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of two to drag many redundance types flexible starter for electric motor system.
For achieving the above object, technical scheme of the present invention is achieved in that
The embodiment of the present invention provides a kind of two to drag many redundance types flexible starter for electric motor system, this system comprises the first soft starter, the second soft starter, normal power supplies network, controller, described normal power supplies network is connected with the first fast acting fuse FU1, the second fast acting fuse FU2 respectively through the first circuit breaker Q F1, the second circuit breaker Q F2, described first fast acting fuse FU1, the second fast acting fuse FU2 are connected with the first soft starter, the second soft starter respectively, form softly to open electric power network after the leading-out terminal parallel connection of described first soft starter, the second soft starter; The described soft electric power network that opens connects several motor, each motor and soft open all to be connected with between electric power network softly open contactor KM, described normal power supplies network is connected to described each motor through bypass contactor and softly opens between contactor KM; Described first soft starter, the second soft starter, eachly softly open contactor KM, each bypass contactor is connected with controller respectively.
In such scheme, described each motor and soft opening between contactor KM are also connected with thermal relay FR.
In such scheme, described first soft starter is main starter, and described second soft starter is from starter.
In such scheme, described first soft starter, the second soft starter are main starter.
Compared with prior art, beneficial effect of the present invention:
1, invention increases the reliability of control system, have employed two soft starters and complete soft start-up process, the operating state of soft starter feeds back to controller at any time, even if a soft starter breaks down, also can be finished the work by second soft starter, can not have influence on the execution of task, and the probability of two soft starter simultaneous faultss is very little, therefore invention increases the global reliability of Soft Starting System.
2, this extends the useful life of soft starter, saves operating cost; Started by the alternate cycles of controller control realization two soft starters, reduce the loss that separate unit soft starter brings because of repeatedly frequent starting, thus add the actual life of each soft starter, reduce long-time running cost.
3, the maintainability of soft starter of the present invention strengthens; Completed the initiating task of all motor by the soft starter of another kilter after a certain soft starter breaks down, and fault soft starter can detachable maintaining immediately, the present invention not only increases system failure responding ability, more will make the fault stand-by period vanishing of system.
4, the present invention accelerates start-up course, reduces energy loss; Under alternative expression mode of operation of the present invention, two soft starters are by alternation, and the startup interval of every two motors will shorten to one and drag multimodal half the time, both accelerated start-up course and additionally reduced energy and waste.
Accompanying drawing explanation
The annexation figure that Fig. 1 provides a kind of two to drag many redundance types flexible starter for electric motor system for the embodiment of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The embodiment of the present invention provides a kind of two to drag many redundance types flexible starter for electric motor system, this system comprises the first soft starter, the second soft starter, normal power supplies network, controller, described normal power supplies network refers to mains supply network, and described normal power supplies network is connected with the first fast acting fuse FU1, the second fast acting fuse FU2 respectively through the first circuit breaker Q F1, the second circuit breaker Q F2.Described first fast acting fuse FU1, the second fast acting fuse FU2 are connected with the first soft starter, the second soft starter respectively, form after the leading-out terminal parallel connection of described first soft starter, the second soft starter and softly open electric power network, the described soft electric power network that opens refers to as shown in Figure 1, and the electric power network of all feeding electric motors is given in the parallel connection of two soft starter leading-out terminals afterwards; The described soft electric power network that opens connects several motor, each motor and soft open all to be connected with between electric power network softly open contactor KM, described normal power supplies network is connected to described each motor through bypass contactor and softly opens between contactor KM; Described first soft starter, the second soft starter, eachly softly open contactor KM, each bypass contactor is connected with controller respectively.
Described controller can adopt the small PLC product of the brand PLC such as Siemens, Mitsubishi and the single-chip microcomputer of various model.
Described each motor and soft opening between contactor KM are also connected with thermal relay FR, and the effect of described thermal relay FR is the automatic cut-off power when motor running overload, protection motor.
Described first soft starter is main starter, described second soft starter is from starter, like this, achieve redundance type operating state, use two soft starters alternately to start multiple motors, use described first soft starter to start multiple motors, described second soft starter is in Status of Backups, if described first starter breaks down, then described second starter completes all working.
Described first soft starter, the second soft starter are main starter, like this, achieve alternative expression operating state, and two soft starter alternations, take turns starting multiple motors.
Embodiment 1:
The embodiment of the present invention provides a kind of two to drag many redundance types flexible starter for electric motor system, as shown in Figure 1, this system comprises the first soft starter, second soft starter, normal power supplies network, controller, described normal power supplies network is through the first circuit breaker Q F1, second circuit breaker Q F2 respectively with the first fast acting fuse FU1, second fast acting fuse FU2 connects, described first fast acting fuse FU1, second fast acting fuse FU2 respectively with the first soft starter, the L1 of the second soft starter, L2, L3 holds connection, described first soft starter, the leading-out terminal T1 of the second soft starter, T2, form after T3 parallel connection and softly open electric power network, the described soft electric power network that opens connects n motor M1 ~ Mn, each motor and soft open all to be connected with between electric power network softly open contactor KM1 ~ KMn, described normal power supplies network is connected to described each motor through bypass contactor KM11 ~ KM1n and softly opens between contactor KM1 ~ KMn, described first soft starter, the second soft starter, eachly softly open contactor, each bypass contactor is connected with controller respectively.
Described each motor and soft opening between contactor KM1 ~ KMn are also connected with thermal relay FR1 ~ FRn.
Describedly softly open contactor, the effect of bypass contactor switches between the two in soft start-up process and normal operating condition by motor, the adhesive being controlled corresponding relay by the output of controller realizes switching with turning off.
The redundance type course of work of the present invention is described below:
When starting working, at random a soft starter is set to main starter in running order, another is set to and is in Status of Backups from starter; After receiving first enabled instruction, first motor M1 soft is opened that contactor KM1 is closed, bypass contactor KM11 disconnects by described controller, then the main soft starter of control order is started working, and make the soft voltage opened on electric power network increase gradually, described motor M1 starts gradually; After the soft voltage opening electric power network reaches rated voltage, described motor M1 normally works, and now described controller disconnection is soft opens contactor KM1, closed bypass contactor KM11, and the soft start-up process of described motor M1 completes, the main starter of control order quits work, and enters radiating state; After receiving second enabled instruction, motor M2 soft is opened that contactor KM2 is closed, bypass contactor KM12 disconnects by described controller.Then the main starter of control order is started working, and make the soft voltage opened on electric power network increase gradually, motor M2 starts gradually.After the soft voltage opening electric power network reaches rated voltage, motor M2 normally works, and the disconnection of this Time Controller is soft opens contactor KM2, closed bypass contactor KM12, and the soft start-up process of motor M2 completes, the main starter of control order quits work, and enters radiating state; Later start-up course is similar, until all motor start-ups are complete.
Work whole process of the present invention is run under the monitoring of controller, once main starter breaks down, controller will be reported to the police immediately and be switched to from starter by main starter, originally switch to main starter from starter, complete remaining work, fault to be repaired from starter etc., is still set as from starter after maintenance.
The alternative expression course of work of the present invention and the redundance type course of work slightly different, difference is: after often completing a soft start, and the setting of master and slave starter all will be done and once exchange by controller; That is, odd number time startup is completed by the first soft starter, and even-times startup is completed by the second soft starter, and two soft starters are powered alternately to soft start electric power network, and maintenance system is normally run.After any starter breaks down, controller all will be reported to the police immediately and will be set to by fault starter be arranged to main starter from starter, good starter, and master-slave role no longer exchanges, fault to be repaired from starter etc., recover to participate in alternation after maintenance.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (4)
1. one kind two is dragged many redundance types flexible starter for electric motor system, it is characterized in that, this system comprises the first soft starter, the second soft starter, normal power supplies network, controller, described normal power supplies network is connected with the first fast acting fuse FU1, the second fast acting fuse FU2 respectively through the first circuit breaker Q F1, the second circuit breaker Q F2, described first fast acting fuse FU1, the second fast acting fuse FU2 are connected with the first soft starter, the second soft starter respectively, form softly to open electric power network after the leading-out terminal parallel connection of described first soft starter, the second soft starter; The described soft electric power network that opens connects several motor, each motor and soft open all to be connected with between electric power network softly open contactor KM, described normal power supplies network is connected to described each motor through bypass contactor and softly opens between contactor KM; Described first soft starter, the second soft starter, eachly softly open contactor KM, each bypass contactor is connected with controller respectively.
2. according to claim 1 two drag many redundance types flexible starter for electric motor system, it is characterized in that: described each motor and soft opening between contactor KM are also connected with thermal relay FR.
3. according to claim 1 and 2 two drag many redundance types flexible starter for electric motor system, it is characterized in that: described first soft starter is main starter, described second soft starter is from starter.
4. according to claim 1 and 2 two drag many redundance types flexible starter for electric motor system, it is characterized in that: described first soft starter, the second soft starter are main starter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510072399.9A CN104660111A (en) | 2015-02-11 | 2015-02-11 | Two-for-many redundant soft-starting system for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510072399.9A CN104660111A (en) | 2015-02-11 | 2015-02-11 | Two-for-many redundant soft-starting system for motor |
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| Publication Number | Publication Date |
|---|---|
| CN104660111A true CN104660111A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510072399.9A Pending CN104660111A (en) | 2015-02-11 | 2015-02-11 | Two-for-many redundant soft-starting system for motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017103140A3 (en) * | 2015-12-18 | 2017-07-27 | Fairford Electronics Limited | Parallel use of soft starters |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2766451Y (en) * | 2004-07-16 | 2006-03-22 | 赵敏 | Redundancy soft starting device for AC motor |
| CN202856669U (en) * | 2012-11-02 | 2013-04-03 | 中国轻工业南宁设计工程有限公司 | Six dragged by two type motor soft starting device |
| CN204465392U (en) * | 2015-02-11 | 2015-07-08 | 陕西科技大学 | A kind of two drag many redundance types flexible starter for electric motor system |
-
2015
- 2015-02-11 CN CN201510072399.9A patent/CN104660111A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2766451Y (en) * | 2004-07-16 | 2006-03-22 | 赵敏 | Redundancy soft starting device for AC motor |
| CN202856669U (en) * | 2012-11-02 | 2013-04-03 | 中国轻工业南宁设计工程有限公司 | Six dragged by two type motor soft starting device |
| CN204465392U (en) * | 2015-02-11 | 2015-07-08 | 陕西科技大学 | A kind of two drag many redundance types flexible starter for electric motor system |
Non-Patent Citations (1)
| Title |
|---|
| 牛红培: "关角隧道斜井施工自动化排水技术", 《隧道建设》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017103140A3 (en) * | 2015-12-18 | 2017-07-27 | Fairford Electronics Limited | Parallel use of soft starters |
| US10804836B2 (en) | 2015-12-18 | 2020-10-13 | Motortronics Uk Limited | Parallel use of soft starters |
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Application publication date: 20150527 |