CN219697488U - Control system with redundant hot standby frequency converter and soft starter - Google Patents
Control system with redundant hot standby frequency converter and soft starter Download PDFInfo
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- CN219697488U CN219697488U CN202321052741.5U CN202321052741U CN219697488U CN 219697488 U CN219697488 U CN 219697488U CN 202321052741 U CN202321052741 U CN 202321052741U CN 219697488 U CN219697488 U CN 219697488U
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- frequency converter
- contactor
- soft starter
- bpq
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- 239000007858 starting material Substances 0.000 title claims abstract description 41
- 238000011084 recovery Methods 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract description 3
- 239000002893 slag Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Motor And Converter Starters (AREA)
Abstract
The utility model discloses a control system with a frequency converter and a soft starter which are redundant heat standby mutually, and belongs to the field of industrial control, wherein the control system with the frequency converter and the soft starter which are redundant heat standby mutually comprises a factory three-phase incoming line power supply L1L 2L 3, a motor fan breaker QF, a motor fan contactor KM, a motor fan thermal relay KH, a motor fan M1, a soft starter RQ incoming line breaker QF2, a soft starter RQ outgoing line contactor KM2, a frequency converter BPQ incoming line breaker QF1, a frequency converter BPQ incoming line fuse FU, a frequency converter BPQ, a frequency converter BPQ outgoing line contactor KM1 and a main motor M. The utility model can be popularized to the electrical control system of the key low-voltage high-power equipment of enterprises, compared with the traditional bypass direct start, the variable-frequency bypass or soft start bypass has the advantages of small start current, reliable control, mutual redundancy, stable structure, simple transformation, reduced impact of the start current on the equipment and the low-voltage power network and reduced safety and environmental protection risks.
Description
Technical Field
The utility model belongs to the field of industrial control, and particularly relates to a control system with a frequency converter and a soft starter which are redundant.
Background
Along with the continuous development of science and technology, more and more high-tech information technology is widely applied to various industries and fields, the auto-coupling voltage reduction, star-delta voltage reduction, soft starter and frequency converter in the industrial control field are widely applied to an electric control system of high-power equipment at present, the auto-coupling voltage reduction and the star-delta voltage reduction are gradually replaced by the soft starter or the frequency converter, but the reliability of the electric control system is directly related to the safe and stable operation of the equipment.
At present, in order to ensure safe and stable operation of equipment, a control mode of a soft start bypass or a variable frequency bypass is adopted when a key equipment electric circuit is designed, but the control mode is used for directly starting a high-power bypass to cause serious impact on equipment and a power grid when a frequency converter or a soft starter is in fault along with equipment aging or improper maintenance in the operation process of the equipment, and if the section accords with the condition of insufficient allowance, the section is tripped by overcurrent. Causing a wide range of blackouts, system outages or safety and environmental incidents that are unacceptable to any one manager. In order to reduce the running risk of a low-voltage power network and the impact of direct start on equipment, ensure the safe and stable running of an electric control system of the equipment, the high-power equipment is controlled by adopting a control system that a frequency converter and a soft starter are redundant and redundant, the impact of direct start on the equipment and a power grid can be well improved, the running risk of the power grid is reduced, and the service life of the equipment is prolonged.
In the prior art, slag flushing pumps of fuming furnaces are used in many iron and steel industries and smelting industries, and the main purpose is to cool low-grade slag generated by smelting down to hot slag discharged from the furnace by high-pressure and large-flow water pumped by the slag flushing pumps. The slag flushing pump of the type is directly started under high power and high load, and can cause serious impact to a power grid and equipment. Careless operation can cause a large-scale power failure, system production stoppage or safety and environmental protection accidents.
Disclosure of Invention
Aiming at the problems, the utility model provides a control system with a frequency converter and a soft starter which are mutually redundant and redundant, which has the characteristics of reliable control, mutual redundancy, stable structure, small starting current, simple transformation, reduced impact of the starting current on equipment and a power grid, wide application range and the like compared with the traditional system, and the service life of the equipment is prolonged. The failure of the frequency converter does not affect the normal operation of the soft starter.
In order to achieve the above purpose, the present utility model is realized by adopting the following technical scheme: the control system for redundant heat recovery of the frequency converter and the soft starter comprises a three-phase incoming line power supply L1L 2L 3, a motor fan breaker QF, a motor fan contactor KM, a motor fan thermal relay KH, a motor fan M1, a soft starter RQ incoming line breaker QF2, a soft starter RQ outgoing line contactor KM2, a frequency converter BPQ incoming line breaker QF1, a frequency converter BPQ incoming line fuse FU, a frequency converter BPQ, a frequency converter BPQ outgoing line contactor KM1 and a main motor M;
the three-phase incoming line power supply L1L 2L 3 is connected with a contactor KM through a breaker QF1 respectively, and the contactor KM is connected with a motor fan M1 to supply power to the motor fan M1 of the main motor M;
the three-phase incoming line power supply L1L 2L 3 is connected with a soft starter RQ through a breaker QF2, the soft starter RQ is connected with a contactor KM2, and the contactor KM2 is connected with a motor M;
the three-phase incoming line power supply L1L 2L 3 is connected with the fuse FU through the breaker QF3, the fuse FU is connected with the frequency converter BPQ, the frequency converter BPQ is connected with the contactor KM1, and the contactor KM1 is connected with the motor M.
Further, the contactor KM1 is electrically interlocked with the contactor KM 2.
Further, the control system also comprises a field control box, a selection switch SA is arranged on the field control box, and the selection switch SA is connected with the frequency converter to realize manual/automatic switching of the frequency converter or the soft starter.
The utility model has the beneficial effects that:
the utility model provides a can promote in the electrical control system of the high-power equipment of enterprise's key low pressure, compare the frequency conversion bypass with traditional bypass direct start or soft start bypass starting current little, control reliably, each other be redundant, stable in structure, reform transform simply, reduce starting current to equipment and low-voltage power network impact, reduce safe environmental protection risk.
Drawings
FIG. 1 is a main circuit diagram of the present utility model;
fig. 2 is a control loop diagram of the present utility model.
In the figure, a three-phase incoming line power supply L1L 2L 3, a motor fan breaker QF, a motor fan contactor KM, a motor fan thermal relay KH, a motor fan M1, a soft starter RQ incoming line breaker QF2, a soft starter RQ outgoing line contactor KM2, a frequency converter BPQ incoming line breaker QF1, a frequency converter BPQ incoming line fuse FU, a frequency converter BPQ, a frequency converter BPQ outgoing line contactor KM1 and a main motor M.
Detailed Description
In order to make the objects, technical solutions and advantageous effects of the present utility model more apparent, preferred embodiments of the present utility model will be described in detail below to facilitate understanding by the skilled person. It should be understood that the description is only illustrative and is not intended to limit the scope of the utility model. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present utility model.
As shown in fig. 1, the control system for redundancy heat recovery of the frequency converter and the soft starter comprises a three-phase incoming line power supply L1L 2L 3, a motor fan breaker QF, a motor fan contactor KM, a motor fan thermal relay KH, a motor fan M1, a soft starter RQ incoming line breaker QF2, a soft starter RQ outgoing line contactor KM2, a frequency converter BPQ incoming line breaker QF1, a frequency converter BPQ incoming line fuse FU, a frequency converter BPQ, a frequency converter BPQ outgoing line contactor KM1 and a main motor M;
the three-phase incoming line power supply L1L 2L 3 is connected with a contactor KM through a breaker QF1 respectively, and the contactor KM is connected with a motor fan M1 to supply power to the motor fan M1 of the main motor M;
the three-phase incoming line power supply L1L 2L 3 is connected with a soft starter RQ through a breaker QF2, the soft starter RQ is connected with a contactor KM2, and the contactor KM2 is connected with a motor M;
the three-phase incoming line power supply L1L 2L 3 is connected with the fuse FU through the breaker QF3, the fuse FU is connected with the frequency converter BPQ, the frequency converter BPQ is connected with the contactor KM1, and the contactor KM1 is connected with the motor M.
The three-phase incoming line power supply L1L 2L 3 from the factory respectively supplies power to the cooling fan motor M1 of the main motor M through the circuit breaker (2), and simultaneously respectively supplies power to the soft starter RQ and the frequency converter BPQ through the circuit breaker (6) and the circuit breaker (9). The control loop is used for selecting the frequency conversion manual/automatic operation KM1 to be attracted or the soft start manual/automatic operation KM2 to be attracted to the main motor cooling fan M1 to start operation, and the main motor M can be started through soft start or frequency conversion, and meanwhile, the frequency conversion and the soft start can be stopped and the main motor M can be started simultaneously, so that a control system that the frequency converter and the soft starter are mutually redundant can be realized.
As shown in fig. 2, 1, KM1 and KM2 are electrically interlocked, so that the selection switch SA1 can only draw in one of the variable frequency manual/automatic or soft start manual/automatic KM1 or KM2, and only the KM2 draw-in frequency converter has the starting condition or the ready or the KM1 draw-in soft starter has the starting condition or the ready, thereby preventing the soft start and the variable frequency from simultaneously starting the main motor M.
2. Manual/automatic switching of the frequency converter or soft starter can be achieved by a field control box selector switch SA. When the selection switch is placed at the manual position, the corresponding button switch is operated to realize manual starting or stopping of the main motor M; when the selection switch is placed at the automatic position, the interface corresponding to the operation DCS can automatically start or stop the main motor M; the selection switch is arranged at the maintenance position, and the main motor M cannot be started no matter manually or automatically.
The utility model provides a control system with a frequency converter and a soft starter which are redundant and standby, which has the characteristics of reliable control, redundancy, stable structure, small starting current, simple transformation, reduced impact of the starting current on equipment and a power grid, wide application range and the like compared with the traditional system, and the service life of the equipment is prolonged. The failure of the frequency converter does not affect the normal operation of the soft starter.
It should be understood that the detailed description of the technical solution of the present utility model, given by way of preferred embodiments, is illustrative and not restrictive. Modifications of the technical solutions described in the embodiments or equivalent substitutions of some technical features thereof may be performed by those skilled in the art on the basis of the present description; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (3)
1. A control system for redundant heat recovery of a frequency converter and a soft starter is characterized in that: the control system for redundant heat recovery of the frequency converter and the soft starter comprises a three-phase incoming line power supply L1, L2 and L3, a motor fan breaker QF, a motor fan contactor KM, a motor fan thermal relay KH, a motor fan M1, a soft starter RQ incoming line breaker QF2, a soft starter RQ outgoing line contactor KM2, a frequency converter BPQ incoming line breaker QF1, a frequency converter BPQ incoming line fuse FU, a frequency converter BPQ, a frequency converter BPQ outgoing line contactor KM1 and a main motor M;
the three-phase incoming line power supplies L1, L2 and L3 are respectively connected with a contactor KM through a breaker QF1, and the contactor KM is connected with a motor fan M1 to supply power to the motor fan M1 of the main motor M;
the three-phase incoming line power supplies L1, L2 and L3 are connected with a soft starter RQ through a breaker QF2, the soft starter RQ is connected with a contactor KM2, and the contactor KM2 is connected with a motor M;
the three-phase incoming line power supplies L1, L2 and L3 are connected with the fuse FU through the breaker QF3, the fuse FU is connected with the frequency converter BPQ, the frequency converter BPQ is connected with the contactor KM1, and the contactor KM1 is connected with the motor M.
2. The control system of claim 1 wherein the frequency converter and the soft starter are redundant, and wherein: the contactor KM1 and the contactor KM2 are electrically interlocked.
3. The control system of claim 1 wherein the frequency converter and the soft starter are redundant, and wherein: the control system also comprises a field control box, wherein a selection switch SA is arranged on the field control box and is connected with the frequency converter, so that the manual/automatic switching of the frequency converter or the soft starter is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321052741.5U CN219697488U (en) | 2023-05-05 | 2023-05-05 | Control system with redundant hot standby frequency converter and soft starter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321052741.5U CN219697488U (en) | 2023-05-05 | 2023-05-05 | Control system with redundant hot standby frequency converter and soft starter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219697488U true CN219697488U (en) | 2023-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321052741.5U Active CN219697488U (en) | 2023-05-05 | 2023-05-05 | Control system with redundant hot standby frequency converter and soft starter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219697488U (en) |
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2023
- 2023-05-05 CN CN202321052741.5U patent/CN219697488U/en active Active
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