CN203387160U - Draught fan control circuit of high voltage frequency converter - Google Patents
Draught fan control circuit of high voltage frequency converter Download PDFInfo
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- CN203387160U CN203387160U CN201320231174.XU CN201320231174U CN203387160U CN 203387160 U CN203387160 U CN 203387160U CN 201320231174 U CN201320231174 U CN 201320231174U CN 203387160 U CN203387160 U CN 203387160U
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Abstract
The utility model relates to a draught fan control circuit of a high voltage frequency converter. The circuit at least comprises a main contactor and a phase sequence protector; a normal open main contact of the main contactor is connected to a three phase line between a three phase power supply input terminal of the draught fan control circuit and a draught fan; and the phase sequence protector is connected with a three phase line of the three phase power supply input terminal and sample the three phase line, and the a normal open auxiliary contact of the phase sequence protector is connected to a power supply loop where a coil of the main contactor is. According to the draught fan control circuit of the high voltage frequency converter, the phase sequence protector is introduced in a draught fan control circuit of the high voltage frequency converter, achieving protection of an unbalance three-phase voltage, reverse phase, an over-high/over-low voltage of a draught fan input power supply; in addition, short circuit protection, operation of start/stop and over-current protection for the draught fan, and delayed shutdown caused by accident high voltage power lossing of the high voltage frequency converter and the like can be achieved via a thermorelay and a time relay, short circuit protection and operation of start/stop of the draught fan can be achieved via an air switch, and reliability of operation of the draught fan and service life of draught fan are both raised.
Description
Technical field
The utility model relates to the technical field of high voltage converter, more particularly, relates to a kind of draught fan control circuit of high voltage converter.
Background technology
Along with rapid development of economy, the cry energy-conservation to product is also surging all the more, has excited greatly the market demand of high voltage converter.Simultaneously, increasing client is also more and more higher to runnability and the reliability requirement of high voltage converter.Really, the main performance of high voltage converter mainly concentrates on power cell, transformer, software algorithm, control part and grades.But the details that some are simple, probability of happening is very high and be easy to affect overall performance is often ignored by the people.In the market most high voltage converter be all adopt forced air cooling (that is: utilize cabinet against the wind machine carry out system radiating) radiating mode; the control of blower fan also is tending towards simply, and modal is to using air switch to add one-level contactor and thermal relay overload protecting circuit as the control protection electric circuit of blower fan or after air switch again.
Although the quality of blower fan is greatly improved at present, if but adopt the high voltage converter of forced air cooling just too simple, unreasonable with the draught fan control circuit of above similar two kinds.A kind of direct control circuit with air switch can be realized the short-circuit protection of blower fan; but all can not effectively make protection when the faults such as blower fan transships, phase shortage, phase sequence mistake; can not realize the high voltage converter fault, the blower fan time delay after the high pressure dead electricity is shut down.The control circuit that another kind of air switch rear class adds contactor and thermal relay can be realized blower fan overload, phase shortage and short-circuit protection; but can not effectively make protection when the fault such as blower fan generation phase sequence mistake, supply voltage be too high or too low; can not realize the high voltage converter fault, the blower fan time delay after the high pressure dead electricity is shut down.The high voltage converter of existing forced air cooling is not all paid attention to this problem, and the accident of therefore bringing happens occasionally, and the most important thing is that it is the potential safety hazard that a kind of probability is higher.
The utility model content
The technical problems to be solved in the utility model is, for existing blower fan, transships, all can not effectively make the defect of protection during the fault such as phase shortage, phase sequence mistake, and a kind of draught fan control circuit of high voltage converter is provided.
The utility model solves the technical scheme that its technical problem adopts: construct a kind of draught fan control circuit of high voltage converter, described circuit at least comprises main contactor and phase sequence relay; Often opening on the three-phase power input end and the three-phase line between blower fan that main contacts accesses described blower fan protection control circuit of described main contactor; Described phase sequence relay is connected it is sampled with the three-phase line of described three-phase power input end, and described phase sequence relay often open the current supply circuit that auxiliary contact access the coil place of described main contactor.
In the draught fan control circuit according to high voltage converter described in the utility model, the access of described main contactor coil is in the first current supply circuit that the arbitrary and neutral line of three-phase power input end forms; Described phase sequence relay often open the first current supply circuit that auxiliary contact access the coil place of described main contactor.
In the draught fan control circuit according to high voltage converter described in the utility model, described circuit also comprises thermal relay, the thermal element of described thermal relay is arranged on often opening on the three-phase line between main contacts and described blower fan of described main contactor, and the normally-closed contact of described thermal relay accesses first current supply circuit at the coil place of described main contactor.
In the draught fan control circuit according to high voltage converter described in the utility model, described circuit also comprises the time relay and control module, the second current supply circuit that the access of the control coil of the described time relay consists of the arbitrary and neutral line of three-phase power input end; The time delay break contact of the described time relay accesses first current supply circuit at the coil place of described main contactor; Described control module is connected with the control coil of the described time relay, the high pressure conditions detected for the magnetic test coil that receives the described time relay, and produce the time delay break contact that corresponding control signal sends to the described time relay.
In the draught fan control circuit according to high voltage converter described in the utility model, described circuit also comprises air switch, and described air switch is arranged on the three-phase line of described three-phase power input end.
In the draught fan control circuit according to high voltage converter described in the utility model, described circuit also comprises auxiliary relay, and the coil of described auxiliary relay accesses digital output loop, and the normally opened contact of described auxiliary relay accesses described the second current supply circuit.
Implement the draught fan control circuit of high voltage converter of the present utility model, have following beneficial effect: the utility model is introduced phase sequence relay in the high voltage converter draught fan control circuit, realizes the too high or too low protection of imbalance of three-phase voltage, anti-phase, supply voltage of blower fan input power; Further by thermal relay and the time relay etc., realize in addition the unexpected high pressure dead electricity of short-circuit protection, start stop operation, overcurrent protection, the high voltage converter time delay shutdown etc. of blower fan; realize short-circuit protection and the start stop operation of blower fan by air switch, improved reliability and the life-span of fan operation.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the circuit diagram according to the draught fan control circuit of the high voltage converter of the utility model preferred embodiment;
Fig. 2 is the circuit diagram according to digital output loop in the draught fan control circuit of the high voltage converter of the utility model preferred embodiment;
Fig. 3 is the circuit diagram according to digital input circuit in the draught fan control circuit of the high voltage converter of the utility model preferred embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.
Referring to Fig. 1, is the circuit diagram of the draught fan control circuit of the high voltage converter according to the utility model preferred embodiment.As shown in Figure 1, the three-phase power input end J1 of the draught fan control circuit of the high voltage converter that the present embodiment provides is connected with three phase mains, for controlling the rotation of blower fan FJ, so that high voltage converter is carried out to forced air cooling.The draught fan control circuit of this high voltage converter at least comprises main contactor KM and phase sequence relay XJ.Wherein, on the three-phase power input end J1 and the three-phase line between blower fan FJ that often drive main contacts access blower fan protection control circuit of main contactor KM; be equipped with and often open the main contacts element on circuit L1, circuit L2 and circuit L3 as shown in Figure 1, and be subject to the control of coil of main contactor KM and synchronization action.The coil access current supply circuit of main contactor KM, this current supply circuit can be the first current supply circuit consisted of the arbitrary of three-phase power input end and neutral line N, an end of this first current supply circuit is connected with the circuit L3 of three-phase power input end as shown in fig. 1, and the other end is connected with the neutral line N of three-phase power input end.
Phase sequence relay XJ is connected it is sampled with L3 with three-phase line L1, the L2 of three-phase power input end, and the current supply circuit at the coil place of often opening auxiliary contact access main contactor KM of phase sequence relay XJ, in aforementioned the first current supply circuit.If three phase mains is often opened the auxiliary contact closure without abnormal phase sequence relay XJ's; if now in the first current supply circuit, do not have other element or other element normally closed the coil of main contactor KM power on; main contactor KM on main line often opens the main contacts closure, and blower fan FJ obtains electric normal operation.If three phase mains is abnormal, thereby the auxiliary contact of often opening of phase sequence relay XJ change by closure the coil losing electricity that off-state makes main contactor KM into, and the main contacts of often opening of the main contactor KM on main line discharges, and blower fan FJ power down quits work.Each protection value of this phase sequence relay XJ all can be set, and relaying protection can be provided for imbalance of three-phase voltage (phase shortage), anti-phase, the supply voltage of blower fan input power are too high or too low.Simultaneously phase sequence relay XJ can show three-phase mains voltage in real time, more than occurring, can also be reported to the police with the indicator light of different conditions intuitively during listed fault.
In preferred embodiment of the present utility model, the draught fan control circuit of this high voltage converter can further include thermal relay KH.The thermal element of this thermal relay KH is arranged on often opening on the three-phase line between main contacts and blower fan FJ of main contactor KM, and the normally-closed contact of thermal relay KH accesses first current supply circuit at the coil place of main contactor KM.When phase shortage or overload occur in blower fan FJ, when the electric current of working on main line surpasses the setting current value, the electric current of the thermal element by flowing into thermal relay KH produces heat, make the bimetal leaf generation deformation of the specific coefficient of expansion, promotion connecting rod action, the normally-closed contact of thermal relay KH of the first current supply circuit that makes to access the coil place of main contactor KM becomes off-state, makes the coil losing electricity of main contactor KM, the main contacts of often opening of main contactor KM discharges, and blower fan FJ power down quits work.
In preferred embodiment of the present utility model, the draught fan control circuit of this high voltage converter can further include time relay KT and control module.The second current supply circuit that the access of the control coil of this time relay KT consists of the arbitrary and neutral line of three-phase power input end, the control coil one end connection line L3 of time relay KT as shown in Figure 1, the other end connects neutral line N.Control module can be controlled by software, its control coil with time relay KT is connected, with normally opened contact (i.e. the normally opened contact of auxiliary relay KA in figure), be connected simultaneously, be used for the high pressure conditions of the control coil detection of time of reception relay K T, and produce the time delay break contact of corresponding control signal to time relay KT.Time relay KT is mainly used to do blower fan time delay in the unexpected high pressure dead electricity of high voltage converter situation and shuts down timing.Control module is by the software detection high pressure conditions, judges that the state etc. of blower fan FJ now determines whether to need time delay to shut down simultaneously, for example at high pressure, from having to the unexpected dead electricity situation of nothing and blower fan FJ, starts timing during in work, carries out the time delay shutdown.Can be set as a condition by detecting high pressure conditions during actual the use, if heavily power on after (in 10S) high pressure dead electricity and close a floodgate successfully at short notice, cancel the timing of time relay KT, not enable blower fan FJ time delay stopping function.The time delay of blower fan FJ also can be processed by software (as ARM, PLC).
In preferred embodiment of the present utility model, the draught fan control circuit of this high voltage converter can further include intermediate air switch QF, and this air switch is arranged on the three-phase line of three-phase power input end.As be separately positioned on the air switch element of the upper synchronization action of circuit L1, L2 and L3 in Fig. 1.Air switch QF is mainly used to do the service entrance switch of power supply, simultaneously when serious short trouble occurs in the blower fan loop fast open circuit protected, can not involve other control system with the fault of guaranteeing circuit at the corresponding levels.
In preferred embodiment of the present utility model, the draught fan control circuit of this high voltage converter can further include auxiliary relay KA.Referring to Fig. 2, is the circuit diagram of digital output loop in the draught fan control circuit of the high voltage converter according to the utility model preferred embodiment.The coil of this auxiliary relay KA accesses digital output loop, and wherein DO1 is numeral output 1 end, and CME is numeral output ground.The normally opened contact of auxiliary relay KA accesses the second current supply circuit.This auxiliary relay KA is used for doing the expansion of switching value output driving force.Do logical process by sampling apparatus collection high voltage converter input voltage signal by software and realize high pressure dead electricity rear drive auxiliary relay KA output.
Pass through foregoing circuit; if three phase mains is often opened the auxiliary contact closure without abnormal phase sequence relay XJ's; if now thermal relay KH does not move, the coil of the normal main contactor KM of time relay KT powers on; main contactor KM on main line often opens the main contacts closure, and blower fan FJ obtains electric normal operation.If three phase mains is abnormal; the auxiliary contact of often opening of phase sequence relay XJ change off-state into by closure; perhaps thermal relay KH action; perhaps time relay KT is abnormal; the coil losing electricity of main contactor KM; the main contacts of often opening of main contactor KM on main line discharges, and blower fan FJ power down quits work.As shown in Figure 3, digital input circuit is accessed in the auxiliary contact of often opening of main contactor KM, and wherein DI1 is numeral input 1 end, and COM is numeral input ground.
The draught fan control circuit of the high voltage converter that the utility model provides can effectively make up the deficiencies in the prior art, realizes that imbalance of three-phase voltage (phase shortage), anti-phase, the supply voltage of blower fan input power is too high or too low, the problem such as overload and short-circuit protection.Realize simultaneously the air-blower control electricity power on from, the unexpected high pressure dead electricity of high voltage converter time delay shutdown etc., reliability and the life-span of having improved greatly fan operation.In addition; because the most site of deployment environment of high voltage converter is all more severe; the time delay of the unexpected dead electricity rear fan of high pressure is shut down thus; can on the basis that meets the complete machine heat radiation, reduce the operating time of blower fan as far as possible; reduce energy consumption; reduce therefore and indrawn dust reduces the replacing of filter screen.
The utility model is described according to specific embodiment, but it will be understood by those skilled in the art that when not breaking away from the utility model scope, can carry out various variations and be equal to replacement.In addition, for adapting to specific occasion or the material of the utility model technology, can carry out many modifications and not break away from its protection range the utility model.Therefore, the utility model is not limited to specific embodiment disclosed herein, and comprises all embodiment that drop into the claim protection range.
Claims (6)
1. the draught fan control circuit of a high voltage converter, is characterized in that, described circuit at least comprises main contactor (KM) and phase sequence relay (XJ); Often opening on the three-phase power input end and the three-phase line between blower fan (FJ) that main contacts accesses described blower fan protection control circuit of described main contactor (KM);
Described phase sequence relay (XJ) is connected it is sampled with the three-phase line of described three-phase power input end, and described phase sequence relay (XJ) often open the current supply circuit that auxiliary contact access the coil place of described main contactor (KM).
2. the draught fan control circuit of high voltage converter according to claim 1, is characterized in that, described main contactor (KM) coil access is in the first current supply circuit that the arbitrary and neutral line of three-phase power input end forms; Described phase sequence relay (XJ) often open the first current supply circuit that auxiliary contact access the coil place of described main contactor (KM).
3. the draught fan control circuit of high voltage converter according to claim 2, it is characterized in that, described circuit also comprises thermal relay (KH), the thermal element of described thermal relay (KH) is arranged on often opening on the three-phase line between main contacts and described blower fan (FJ) of described main contactor (KM), and the normally-closed contact of described thermal relay (KH) accesses first current supply circuit at the coil place of described main contactor (KM).
4. the draught fan control circuit of high voltage converter according to claim 2, it is characterized in that, described circuit also comprises the time relay (KT) and control module, the second current supply circuit that the access of the control coil of the described time relay (KT) consists of the arbitrary and neutral line of three-phase power input end; The time delay break contact of the described time relay (KT) accesses first current supply circuit at the coil place of described main contactor (KM); Described control module is connected with the control coil of the described time relay (KT), the high pressure conditions detected for the magnetic test coil that receives the described time relay (KT), and produce the time delay break contact that corresponding control signal sends to the described time relay (KT).
5. the draught fan control circuit of high voltage converter according to claim 2, is characterized in that, described circuit also comprises air switch (QF), and described air switch (QF) is arranged on the three-phase line of described three-phase power input end.
6. the draught fan control circuit of high voltage converter according to claim 4, it is characterized in that, described circuit also comprises auxiliary relay (KA), the coil of described auxiliary relay (KA) accesses digital output loop, and the normally opened contact of described auxiliary relay (KA) accesses described the second current supply circuit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320231174.XU CN203387160U (en) | 2013-05-02 | 2013-05-02 | Draught fan control circuit of high voltage frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320231174.XU CN203387160U (en) | 2013-05-02 | 2013-05-02 | Draught fan control circuit of high voltage frequency converter |
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| CN203387160U true CN203387160U (en) | 2014-01-08 |
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| CN201320231174.XU Expired - Fee Related CN203387160U (en) | 2013-05-02 | 2013-05-02 | Draught fan control circuit of high voltage frequency converter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621260A (en) * | 2016-03-15 | 2016-06-01 | 山东钢铁股份有限公司 | Safety device capable of automatically transmitting power after unexpected power loss of crown block |
| CN105883363A (en) * | 2015-04-23 | 2016-08-24 | 山东华联矿业股份有限公司 | Anti-electric-shock fan starting device |
| CN106207965A (en) * | 2016-09-07 | 2016-12-07 | 合肥三冠包装科技有限公司 | A kind of protection circuit matching servo packer main circuit |
| CN108695827A (en) * | 2018-07-04 | 2018-10-23 | 天地（常州）自动化股份有限公司 | The heavy water processing control circuit of dense medium speed |
| CN111064414A (en) * | 2019-12-17 | 2020-04-24 | 中原工学院 | Grain depot fan controller capable of being preferentially operated on site |
-
2013
- 2013-05-02 CN CN201320231174.XU patent/CN203387160U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105883363A (en) * | 2015-04-23 | 2016-08-24 | 山东华联矿业股份有限公司 | Anti-electric-shock fan starting device |
| CN105621260A (en) * | 2016-03-15 | 2016-06-01 | 山东钢铁股份有限公司 | Safety device capable of automatically transmitting power after unexpected power loss of crown block |
| CN106207965A (en) * | 2016-09-07 | 2016-12-07 | 合肥三冠包装科技有限公司 | A kind of protection circuit matching servo packer main circuit |
| CN108695827A (en) * | 2018-07-04 | 2018-10-23 | 天地（常州）自动化股份有限公司 | The heavy water processing control circuit of dense medium speed |
| CN108695827B (en) * | 2018-07-04 | 2024-02-06 | 天地（常州）自动化股份有限公司 | Heavy medium fast submerged processing control circuit |
| CN111064414A (en) * | 2019-12-17 | 2020-04-24 | 中原工学院 | Grain depot fan controller capable of being preferentially operated on site |
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Effective date of registration: 20160217 Address after: Wuzhong District Wuzhong Economic Development Zone, Suzhou City, Jiangsu province 215000 Wang Xiang Shan Industrial Park Road on the north side of friends Patentee after: Suzhou Huichuan Technology Co.,Ltd. Patentee after: Shenzhen Inovance Technology Co., Ltd. Address before: Wuzhong District Wuzhong Economic Development Zone, Suzhou City, Jiangsu province 215000 Wang Xiang Shan Industrial Park Road on the north side of friends Patentee before: Suzhou Huichuan Technology Co.,Ltd. Patentee before: Suzhou Monarch Control Technology Co., Ltd. Patentee before: Shenzhen Inovance Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20190502 |