CN206835020U - Phase SCR soft starter - Google Patents
Phase SCR soft starter Download PDFInfo
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- CN206835020U CN206835020U CN201720762299.3U CN201720762299U CN206835020U CN 206835020 U CN206835020 U CN 206835020U CN 201720762299 U CN201720762299 U CN 201720762299U CN 206835020 U CN206835020 U CN 206835020U
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- thyristor
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- electric machine
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Abstract
The utility model discloses a kind of phase SCR soft starter, for three phase electric machine, including silicon controlled component and controller；Silicon controlled component includes the first thyristor and the second thyristor, one end of first thyristor is connected with the terminals of the first phase of three phase electric machine, the other end is connected with the terminals of the first phase of three phase mains, one end of second thyristor is connected with the terminals of the second phase of three phase electric machine, and the other end is connected with the terminals of the second phase of three phase mains；Control gate pole of the output end of controller respectively with the first thyristor and the second thyristor is connected；Terminals of the terminals of the third phase of three phase electric machine directly with the third phase of three phase mains are connected.By the technical solution of the utility model, while keeping thyristor to three phase electric machine smooth start and stopping, the dosage of controllable silicon materials is reduced, reduces cost, while reduces the volume and caloric value of soft starter.
Description
Technical field
It the utility model is related to motor technology field, more particularly to a kind of phase SCR soft starter.
Background technology
In the prior art, the general structure of the SCR control soft starter of three phase electric machine is as shown in figure 1, pass through controller
The angle of flow for the thyristor that adjustment is in series with three phase electric machine, the stepless continuous change of three phase electric machine voltage is realized, so as to
Control and reduction current of electric, reach the purpose of smooth start.But the high-power silicon controlled rectifier in three-phase controllable silicon is mainly by holding high
Expensive, high-purity semiconductor monocrystal silicon materials are formed, and the cost of three-phase controllable silicon occupies the total material cost of soft starter
60% to 80%, other traditional soft start schemes (such as single-circuit transformer) are compared, product cost is higher, influences the competing of product
Strive and promote.
Utility model content
At least one of regarding to the issue above, the utility model provides a kind of phase SCR soft starter, utilizes
The phasor of three-phase alternating current and the principle for being zero, a wherein phase thyristor is replaced with wire, only with phase SCR control
Three-phase alternating current processed, while keeping thyristor to three phase electric machine smooth start and stopping, reducing controllable silicon materials
Dosage, reduce cost, while reduce the volume and caloric value of soft starter.
To achieve the above object, the utility model provides a kind of phase SCR soft starter, for three phase electric machine, bag
Include silicon controlled component and controller；The silicon controlled component includes the first thyristor and the second thyristor, and described
One end of one thyristor is connected with the terminals of the first phase of the three phase electric machine, the first phase of the other end and three phase mains
Terminals be connected, one end of second thyristor is connected with the terminals of the second phase of the three phase electric machine, another
End is connected with the terminals of the second phase of the three phase mains；The output end of the controller is first with first controllable silicon respectively
Part is connected with the control gate pole of second thyristor；The terminals of the third phase of the three phase electric machine directly with it is described
The terminals of the third phase of three phase mains are connected.
In the above-mentioned technical solutions, it is preferable that first thyristor and second thyristor include
The IGCT that two inverse parallels are set.
In the above-mentioned technical solutions, it is preferable that the terminals of the third phase of the three phase electric machine pass through wire and described three
The terminals of the third phase of phase power supply are connected.
In the above-mentioned technical solutions, it is preferable that the power requirements of the wire and the three phase electric machine match setting.
Compared with prior art, the beneficial effects of the utility model are：Using three-phase alternating current phasor and be zero
Principle, a wherein phase thyristor is replaced with wire, only controls three-phase alternating current with phase SCR, keeping controllable silicon member
While part is to three phase electric machine smooth start and stopping, the dosage of controllable silicon materials is reduced, cost is reduced, reduces simultaneously
The volume and caloric value of soft starter.
Brief description of the drawings
Fig. 1 is a kind of structural representation of three-phase controllable silicon soft starter disclosed in embodiment in the prior art；
Fig. 2 is the structural representation of phase SCR soft starter disclosed in a kind of embodiment of the utility model；
Fig. 3 is the control principle schematic diagram of the angle of flow of thyristor disclosed in a kind of embodiment of the utility model；
Fig. 4 is the variation relation schematic diagram of the angle of flow and voltage effective value disclosed in a kind of embodiment of the utility model.
In figure, the corresponding relation between each component and reference is：
10. phase SCR soft starter, 11. silicon controlled components, 12. controllers, 13. three phase electric machines, 14. three-phase electricities
Source.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is part of the embodiment of the present utility model, rather than whole embodiments.Based on the reality in the utility model
Apply example, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.
The utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in Fig. 2 according to a kind of phase SCR soft starter 10 provided by the utility model, for three phase electric machine
13, including silicon controlled component 11 and controller 12；Silicon controlled component 11 includes the first thyristor and the second thyristor,
One end of first thyristor is connected with the terminals of the first phase of three phase electric machine 13, the other end and the first of three phase mains 14
The terminals of phase are connected, and one end of the second thyristor is connected with the terminals of the second phase of three phase electric machine 13, the other end with
The terminals of second phase of three phase mains 14 are connected；The output end of controller 12 is controllable with the first thyristor and second respectively
The control gate pole of silicon cell is connected；The terminals of the third phase of three phase electric machine 13 directly connect with the third phase of three phase mains 14
Line end is connected.
In this embodiment, three-phase alternating current is utilizedPhasor and be zero principle (such as formula (1)
It is shown)：
A wherein phase current size is equal to the size of other biphase current phasor sum, removes a wherein phase thyristor,
Three-phase alternating current equally can be effectively only controlled with other phase SCR, thyristor is steady to three phase electric machine 13 keeping
Start and stop while, reduce the dosage of controllable silicon materials, reduce cost, at the same reduce soft starter volume and
Caloric value.
Wherein, the first thyristor in silicon controlled component 11 and the second thyristor are IGCT, for can
Rectification is controlled, effective switch control is carried out to high power AC electric current, and the reaction time is extremely short, can be carried out in Microsecond grade open-minded
Operation, and turned off in time in zero crossing.
Specifically, alternating current is generally sinusoidal waveform, and its a cycle is 360 degree, and positive half cycle accounts for 180 degree, negative half period
Account for 180 degree.When alternating current passes through controllable silicon, by control AC current can be made to be opened at the unspecified angle of 0-180 degree
Begin conducting, i.e., so-called controlled rectification, when positive half cycle is added to the anode of controllable silicon, in a certain angle of 180 degree, in controllable silicon
Control pole adds a trigger pulse, such as in 30 degree plus a pulse, and controllable silicon can only be by remaining 150 degree of electric current.Wherein, it is brilliant
The electrical angle in on-state is referred to as the angle of flow to brake tube (being controllable silicon) in a power cycle.
As shown in figure 3, soft starter accurately monitors the zero crossing of alternating voltage in real time, then according to the zero crossing moment, prolong
Slow triggering and conducting controllable silicon, by accurately controlling the alternating voltage angle of flowConsecutive variations, so as to realize that output voltage is effective
The continuous size variation of value.
As shown in figure 4, the regulation alternating voltage angle of flowConsecutive variations from 180 ° to 0 °, it is possible to achieve voltage effective value
Consecutive variations of the Vrms from 0% to 100%.Triggering and conducting angle so by controlling thyristor, it is possible to control three-phase
The size of the voltage of motor 13, with the rising of voltage, the starting torque of three phase electric machine 13 gradually increases, and rotating speed is also gradually accelerated, and reaches
To the effect of soft start.It is opposite with the control process of above-mentioned soft start, by controlling the angle of flow of thyristor, will convey
Voltage to three phase electric machine 13 gradually reduces, and the rotating speed of three phase electric machine 13 gradually decreases to zero, reaches the effect that soft stop is stopped.
Controller 12 is by formula (1) algorithm, the angle of flow of the thyristor of Comprehensive Control first and the second thyristor,
So as to control the electric current of the first phase and the second phase into three phase electric machine 13, and then indirect control enters the 3rd of three phase electric machine 13
The electric current of phase, output voltage is controlled by the collaboration between the three-phase of three phase mains 14, makes the input voltage of three phase electric machine 13
Risen or fallen with preset function relation.
Wherein, controller 12 includes but is not limited to single-chip microcomputer, device for embedded control or integrated circuit, it is preferable that control
Device 12 includes alternating current signal detection circuit, trigger control circuit, operation display panel etc..Also include storage dress in controller 12
Put, for storing one or more groups of programs, controller 12 is entered by performing the program stored to the angle of flow of silicon controlled component 11
Row control, so as to complete soft start function.Connected mode between controller 12 and silicon controlled component 11 with it is of the prior art
Connected mode is identical, will not be repeated here.
In the above embodiment, it is preferable that the first thyristor and the second thyristor include two inverse parallels
The IGCT of setting.
In this embodiment, the IGCT that two inverse parallels are set is included per thyristor all the way, by IGCT
Forward conduction, the mechanism reversely ended, it is operated respectively in the positive half-wave of alternating current and negative half-wave.
In the above embodiment, it is preferable that the terminals of the third phase of three phase electric machine 13 pass through wire and three phase mains 14
The terminals of third phase be connected.
In this embodiment, by wire by the third phase of the terminals of the third phase of three phase electric machine 13 and three phase mains 14
Terminals be connected, the model and parameter of wire meet the specification requirement of the voltage, electric current, power of three phase electric machine 13.
The setting in the above embodiment, it is preferable that power requirements of wire and three phase electric machine 13 match.
In this embodiment, the specification of wire is configured according to the voltage, electric current, power requirements of three phase electric machine 13, is subtracted
Small wire can not the power of load three phase electric machine 13 cause the possibility of line fault.
It is worth especially set out, in the above-described embodiments, the first thyristor and second in silicon controlled component 11
Thyristor, the first phase, the second phase, the first phase in third phase, and three phase mains 14, the second phase in three phase electric machine 13
And third phase, " first " therein, " second ", " the 3rd " are only intended to that its connected mode is explicitly described, and do not indicate that order.Three
The connected mode between three-phase in phase motor and three phase mains does not also limit, i.e., either end can all be used as the first phase, second
The terminals of phase or third phase.
It is embodiment of the present utility model above, it is contemplated that three-phase controllable silicon soft starter cost is higher in the prior art
Technical problem, the utility model proposes a kind of phase SCR soft starter, using three-phase alternating current phasor and be
Zero principle, a wherein phase thyristor is replaced with wire, only controls three-phase alternating current with phase SCR, keeping controllable
While silicon cell is to three phase electric machine smooth start and stopping, the dosage of controllable silicon materials is reduced, cost is reduced, subtracts simultaneously
The volume and caloric value of soft starter are lacked.
Preferred embodiment of the present utility model is these are only, is not limited to the utility model, for this area
Technical staff for, the utility model can have various modifications and variations." first ", " second ", " the 3rd " referred in text
Etc. being not used in expression order, it is served only for describing the connected mode between device or component.It is all in spirit of the present utility model and former
Within then, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (4)
- A kind of 1. phase SCR soft starter, for three phase electric machine, it is characterised in that including：Silicon controlled component and controller；The silicon controlled component includes the first thyristor and the second thyristor, one end of first thyristor It is connected with the terminals of the first phase of the three phase electric machine, the other end is connected with the terminals of the first phase of three phase mains, described One end of second thyristor is connected with the terminals of the second phase of the three phase electric machine, the other end and the three phase mains The terminals of second phase are connected；The output end of the controller respectively with first thyristor and the control gate pole of second thyristor It is connected；Terminals of the terminals of the third phase of the three phase electric machine directly with the third phase of the three phase mains are connected.
- 2. phase SCR soft starter according to claim 1, it is characterised in that first thyristor and institute Stating the second thyristor includes the IGCT that two inverse parallels are set.
- 3. phase SCR soft starter according to claim 1, it is characterised in that the third phase of the three phase electric machine Terminals are connected by wire with the terminals of the third phase of the three phase mains.
- 4. phase SCR soft starter according to claim 3, it is characterised in that the wire and the three phase electric machine Power requirements match setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720762299.3U CN206835020U (en) | 2017-06-28 | 2017-06-28 | Phase SCR soft starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720762299.3U CN206835020U (en) | 2017-06-28 | 2017-06-28 | Phase SCR soft starter |
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| Publication Number | Publication Date |
|---|---|
| CN206835020U true CN206835020U (en) | 2018-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720762299.3U Active CN206835020U (en) | 2017-06-28 | 2017-06-28 | Phase SCR soft starter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116582030A (en) * | 2023-07-13 | 2023-08-11 | 上海精泰技术有限公司 | Pulse width determining method and pulse transmitting method |
-
2017
- 2017-06-28 CN CN201720762299.3U patent/CN206835020U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116582030A (en) * | 2023-07-13 | 2023-08-11 | 上海精泰技术有限公司 | Pulse width determining method and pulse transmitting method |
| CN116582030B (en) * | 2023-07-13 | 2023-09-05 | 上海精泰技术有限公司 | Pulse width determining method and pulse transmitting method |
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