CN205620728U - AC motor's no arc switch - Google Patents
AC motor's no arc switch Download PDFInfo
- Publication number
- CN205620728U CN205620728U CN201620253266.1U CN201620253266U CN205620728U CN 205620728 U CN205620728 U CN 205620728U CN 201620253266 U CN201620253266 U CN 201620253266U CN 205620728 U CN205620728 U CN 205620728U
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- thyristor
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- alternating current
- switch
- chip microcomputer
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Abstract
The utility model discloses a AC motor's no arc switch, switch on thyristor, reverse -conducting thyristor, bypass relay, MCU singlechip and control command including the forward, the forward switches on the shape crystallization floodgate nest of tubes behind thyristor and the reverse -conducting thyristor reverse parallel connection, and thyristor group connects in parallel with the bypass relay, thyristor group is connected with alternating current power supply with a bypass relay parallelly connected common port, and thyristor group is connected with AC motor with bypass relay another parallelly connected common port, control command passes through the input transfer command signal of MCU singlechip, and the output of MCU singlechip switches on the control electrode of thyristor and the control electrode triggering signal of reverse -conducting thyristor for the forward, and the MCU singlechip is through its output end control bypass relay actuation or open. The utility model discloses a MCU single chip microcomputer control thyristor group realizes switch motion, and pressure drop loss problem between the afterflow period has been avoided to the bypass relay, makes whole switch motion not have the spark completely, does not have the loss.
Description
Technical field
This utility model relates to motor control technology field, particularly relates to the Switch without electric arc of a kind of alternating current generator.
Background technology
Electromagnetic contactor is the most universal currently used electric switch, be mainly used in control motor, electrical equipment open-minded
With turn-off function；But catalyst when adhesive action owing to being switched on or off time electric current can produce great transient changing, institute
All can produce spark in the moment opened and turn off, such situation is posting many occasions discomfort that " No Open Flames " indicates
Close and use, such as: national regulation must use explosive-proof grade one-level hazardous area and production, process, pack, carry, store in a warehouse,
Place two grades of places of dangerous substance；These dangerous substances include the ring of combustibility, explosivity, escaping gas, liquid, dust
Border；Because these material concentrations exceed certain proportion in air, add that spark produces the serious unexpected thing that blast will occur
Therefore, here it is many air blastings, dirt are quick-fried, one of the serious accident reason of fire.
Certainly, national regulation must use qualified explosive-proof grade product in one-level danger place, but present explosion-proof
Electric product is substantially " product having spark puts on explosion-proof clothes ", and this is clearly passive explosion-proof concept.Anti-explosion product
Should actively create safety rather than use the electric switch not having spark generation to put on explosion-proof clothes again.So employing nothing
Arc electric switch is only double shield, more can active protection labourer's safety, reach explosion-proof purpose.
Common mechanical electrical design personnel for the two grades of Code in Hazardous Special Locations that No Open Flames it is not intended that electric switch can produce
The problem of spark, it is required that must not there be the material of combustibility, explosivity, escaping gas, liquid, dust in place, this is this
End is inverted, the excuse shirked responsibility；Because these Code in Hazardous Special Locations are inherently with the presence of these dangerous substances, engineer should select
Select and do not have the switch of spark and avoid dangerous substance of igniting, be only the most correct way.
Need the switch used to the most important thing is alternating current generator in workshop, next to that various electric device, start
Alternating current generator is all by quasiconductor soft initiator, but, the necessary external bypass catalyst of quasiconductor soft initiator, bypass contact
Device will produce spark, it is impossible to reaches without arc effect, and spark quick-fried, the topmost blasting fuse of fire that is air blasting, dirt, the most partly lead
Body soft initiator still cannot guarantee the safety in production of working space, is easily caused ignite fire or air blasting, dirt these danger quick-fried
Bad accident.
The special occasions that what this programme aimed to solve the problem that is current " No Open Flames " is not suitable for using catalyst as electrically opening
Closing, the catalyst succedaneum of this programme can reach not have when opening spark, also not have the function of spark, i.e. open without arc during shutoff
Close；It is applicable to single-phase and three phase mains startup motor and various electric equipment products, replaces the contactless contactor having spark, solve current
The potential safety hazard of these No Open Flames Code in Hazardous Special Locations, and the positive safeguard of explosion-protection equipment is provided, reach Code in Hazardous Special Locations and more pacify
Full working environment.
Utility model content
For weak point present in above-mentioned technology, this utility model provides a kind of safety, does not produce pyrophoric exchange
The Switch without electric arc of motor, does not has spark when reaching to open, do not have the function of spark during shutoff yet, it is achieved without arc effect.
In order to achieve the above object, the Switch without electric arc of a kind of alternating current generator of this utility model, including forward conduction IGCT,
Reverse-conducting thyristor, bypass relay, MCU single-chip microcomputer and control instruction, described forward conduction IGCT and reverse-conducting are brilliant
Form thyristor groups after brake tube reverse parallel connection, and described thyristor groups is in parallel with bypass relay；Described thyristor groups and bypass
One common port of relay parallel connection is connected with alternating current power supply, and another public affairs that described thyristor groups is in parallel with bypass relay
End is connected with alternating current generator altogether；The control instruction input transmission command signal by MCU single-chip microcomputer, described MCU single-chip microcomputer
Outfan triggers signal, and described MCU monolithic to the control pole controlling pole and reverse-conducting thyristor of forward conduction IGCT
Machine controls bypass relay adhesive by its outfan or opens.
Wherein, this Switch without electric arc also includes triggering circuit, the outfan of described MCU single-chip microcomputer and the input triggering circuit
Connect, and the outfan of described MCU single-chip microcomputer is brilliant to control pole and the reverse-conducting of forward conduction IGCT by triggering circuit
Signal is triggered in the control pole of brake tube, and the outfan of described MCU single-chip microcomputer is by triggering circuit to bypass relay command signal.
Wherein, the connected formation of negative electrode of the anode of described forward conduction IGCT and reverse-conducting thyristor is public
End is connected with alternating current power supply, and the connected formation of anode of the negative electrode of described forward conduction IGCT and reverse-conducting thyristor
Common port be connected with alternating current generator.
Wherein, this Switch without electric arc also includes that voltage detecting circuit and current detection circuit, described voltage detecting circuit pass through
Its input gathers the voltage of alternating current power supply, and the outfan of described voltage detecting circuit is connected with the input of MCU single-chip microcomputer；
Described current detection circuit by its input gather alternating current power supply electric current, and the outfan of described current detection circuit with
The input of MCU single-chip microcomputer connects.
The beneficial effects of the utility model are:
Compared with prior art, the Switch without electric arc of alternating current generator of the present utility model, use antiparallel forward conduction brilliant
The thyristor groups of brake tube and reverse-conducting thyristor composition, as switch, uses the bypass relay conduct in parallel with thyristor groups
Freewheeling state after forward conduction turn on thyristors, makes constant conduction between alternating current power supply and alternating current generator, and, due to forward
Spark is not all had to produce during conducting thyristor and reverse-conducting thyristor on or off, if the output of MCU single-chip microcomputer
Hold and can realize switch motion to the control pole triggering signal controlling pole and reverse-conducting thyristor of forward conduction IGCT, other
Road relay avoids the pressure drop loss problem of forward conduction IGCT during afterflow, makes whole switch motion entirely without fire
Flower, loss, does not reaches Switch without electric arc purpose.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of the Switch without electric arc of this utility model alternating current generator.
Main element symbol description is as follows:
1, MCU single-chip microcomputer 2, triggering circuit
3, voltage detecting circuit 4, current detection circuit
5, alternating current power supply 6, alternating current generator.
Detailed description of the invention
In order to more clearly state this utility model, below in conjunction with the accompanying drawings this utility model is further described.
Refering to Fig. 1, the Switch without electric arc of a kind of alternating current generator of this utility model, including forward conduction IGCT VT1, reversely lead
Logical IGCT VT2, bypass relay K M, MCU single-chip microcomputer 1 and control instruction, forward conduction IGCT VT1 and reverse-conducting crystalline substance lock
Form thyristor groups after pipe VT2 reverse parallel connection, and thyristor groups is in parallel with bypass relay K M；Thyristor groups and bypass relay
A common port in parallel for KM is connected with alternating current power supply 5, and another common port that thyristor groups is in parallel with bypass relay K M
It is connected with alternating current generator 6；The control instruction input transmission command signal by MCU single-chip microcomputer 1, the outfan of MCU single-chip microcomputer 1
Trigger signal to the control pole controlling pole or reverse-conducting thyristor VT2 of forward conduction IGCT VT1, and MCU single-chip microcomputer 1 leads to
Cross its outfan control bypass relay K M adhesive or open.
The characteristic of forward conduction IGCT VT1 and reverse-conducting thyristor VT2 is: only need to add in the control pole of IGCT
Trigger signal, IGCT can be made to be become conducting state from blocking state；Cannot turn off after conducting, can only automatically close by zero crossing
Disconnected.Control instruction can be sent by keyboard or digital signal.
The alternating current of alternating current power supply 5 output is sinusoidal wave, including positive half-wave and negative half-wave.Alternating current power supply 5 in this case can
Think single phase alternating current power supply, it is also possible to for three-phase alternating-current supply, corresponding alternating current generator 6 is load motor and three and intersects
Stream motor, when single phase alternating current power supply accesses this switch, the most only one group thyristor groups in parallel and bypass relay K M, and three-phase
When alternating current power supply accesses this switch, corresponding every thyristor groups that all should access one group of parallel connection mutually and bypass relay K M, be therefore
Three groups of thyristor groups in parallel and bypass relay K M, can separate management and control and respectively organize thyristor groups and bypass relay K M of parallel connection,
Also can simultaneously management and control three groups thyristor groups in parallel and bypass relay K M.
Operation principle of the present utility model is: 1) turn-on action: when bypass relay K M disconnects, and thyristor groups is in blocking-up
State, and when control instruction sends the turn-on command of incoming transport power supply 5, after MCU single-chip microcomputer 1 receives turn-on command, its output
Hold and trigger signal, now forward conduction to the control pole controlling pole and reverse-conducting thyristor VT2 of forward conduction IGCT VT1
IGCT VT1 and reverse-conducting thyristor VT2 is in conducting state, and the alternating current positive half-wave of alternating current power supply 5 passes through positive guide
Logical IGCT VT1 flows to alternating current generator 6, and the alternating current of alternating current power supply 5 is born half-wave and flowed to hand over by reverse-conducting thyristor VT2
Stream motor 6, alternating current generator 6 starts, owing to the most not rushing when forward conduction IGCT VT1 and reverse-conducting thyristor VT2 turns on
Hit electric current, therefore do not have spark to produce；2) flywheel action: after forward conduction IGCT VT1 and reverse-conducting thyristor VT2 conducting
Alternating current generator 6 starts, and MCU single-chip microcomputer 1 controls bypass relay K M adhesive and stopping aligns conducting thyristor VT1 and reversely leads
Logical IGCT VT2 triggers, and now the alternating current of alternating current power supply 5 is preferentially flowed into alternating current generator 6, now forward by bypass relay K M
Conducting thyristor VT1 and reverse-conducting thyristor VT2 is equivalent to short circuit so that forward conduction IGCT VT1 and reverse-conducting are brilliant
Both brake tube VT2 zero crossing automatically shuts down, it is to avoid go out after forward conduction IGCT VT1 and reverse-conducting thyristor VT2 conducting
Existing pressure drop consume phenomenon, it is achieved the freewheeling state after conducting, it is achieved that without arc, lossless when opening switch；3) shutoff action:
When control instruction sends the shutoff instruction of switching off AC power 5, after MCU single-chip microcomputer 1 receives shutoff instruction, its outfan is just being given
Signal is triggered in the control pole controlling pole and reverse-conducting thyristor VT2 of conducting thyristor VT1 so that forward conduction IGCT
VT1 and reverse-conducting thyristor VT2 is in conducting state, and after thyristor groups and bypass relay K M parallel running, MCU is mono-
Sheet machine 1 controls bypass relay K M and opens, and now, alternating current power supply 5 is powered to alternating current generator 6 by thyristor groups, MCU single-chip microcomputer
1 stops triggering signal, forward conduction to the control pole controlling pole and reverse-conducting thyristor VT2 of forward conduction IGCT VT1
IGCT VT1 passes through at positive half-wave, and reverse-conducting thyristor VT2 automatically shuts down both rear at negative half-wave, without going past
Bypass relay K M, thus without producing spark, completes without arc switching off AC power 5.
Compared with prior art, the Switch without electric arc of alternating current generator of the present utility model, use antiparallel forward conduction brilliant
The thyristor groups of brake tube VT1 and reverse-conducting thyristor VT2 composition, as switch, uses the bypass relay in parallel with thyristor groups
Device KM, as the freewheeling state after forward conduction IGCT VT1 conducting, makes constant conduction between alternating current power supply 5 and alternating current generator 6,
Further, owing to all not having spark to produce during forward conduction IGCT VT1 and reverse-conducting thyristor VT2 on or off,
As long as the outfan of MCU single-chip microcomputer 1 controls pole or the control pole of reverse-conducting thyristor VT2 to forward conduction IGCT VT1
Trigger signal and can realize switch motion, bypass the pressure drop of forward conduction IGCT VT1 during relay K M avoids afterflow and damage
Consumption problem, makes whole switch motion entirely without spark, and loss, does not reaches Switch without electric arc purpose.
In the present embodiment, this Switch without electric arc also includes triggering circuit 2, the outfan of MCU single-chip microcomputer 1 and triggering circuit 2
Input connects, and the outfan of MCU single-chip microcomputer 1 is by triggering circuit 2 to the control pole of forward conduction IGCT VT1 with reverse
Signal is triggered in the control pole of conducting thyristor VT2, and the outfan of MCU single-chip microcomputer 1 is by triggering circuit 2 to bypass relay K M
Command signal.Owing to the output electric current of MCU single-chip microcomputer 1 is the least, so using triggering circuit 2 to drive, make the triggering of output
Pulse can reach the number needed for making the control extremely controlling pole and reverse-conducting thyristor VT2 conducting of forward conduction IGCT VT1
Value.
In the present embodiment, the anode of forward conduction IGCT VT1 and the connected shape of negative electrode of reverse-conducting thyristor VT2
The common port become is connected with alternating current power supply 5, and the negative electrode of forward conduction IGCT VT1 and the sun of reverse-conducting thyristor VT2
The common port of the connected formation in pole is connected with alternating current generator 6.Antiparallel forward conduction IGCT VT1 and reverse-conducting thyristor
VT2 arranges in pairs or groups controllable bypass relay K M, it is ensured that the effect without arc of alternating current power supply 5 on or off.
In the present embodiment, this Switch without electric arc also includes voltage detecting circuit 3 and current detection circuit 4, voltage detecting circuit 3
Gathered the voltage of alternating current power supply 5 by its input, and the input of the outfan of voltage detecting circuit 3 and MCU single-chip microcomputer 1 is even
Connect；Current detection circuit 4 gathers the electric current of alternating current power supply 5 by its input, and the outfan of current detection circuit 4 and MCU
The input of single-chip microcomputer 1 connects.Voltage detecting circuit 3 and current detection circuit 4 are each responsible for the electricity of acquisition testing alternating current power supply 5
Press and electric current, and the voltage and current collected is transferred to MCU single-chip microcomputer 1 and is analyzed processing；Current detection circuit 4 is mainly used
In detecting whether the electric machinery for having impact electric current, the most then reduced-voltage starting principle can be used to be stepped up trigger angle
Reducing and start impact, can all-wave trigger immediately without exceeding rated current, employing quasiconductor is as switch, when opening
Can reach without arcuation state；Or discovery fault current, MCU single-chip microcomputer 1 can be by the control to forward conduction IGCT VT1
Signal is triggered in the control pole of pole and reverse-conducting thyristor VT2, it is achieved forward conduction IGCT VT1 and reverse-conducting thyristor
The conducting of VT2, and control opening of bypass relay K M, thus realize without arc shutoff action.
In the job shop of petrochemical industry, flammable liquid is had constantly to be volatized in air at any time, when air is dense
If degree has electromagnetic switch adhesive when more than certain proportion being, spark will be produced and cause the contingency of " air blasting " or fire.
The electrical appliance using Switch without electric arc to control the most not there are the blasting fuse of ignition.
Inside warehouse or corn job shop, if ground corn, dust can be caused to be full of when processing or carrying corn
In air, if concentration reaches certain proportion, as long as the serious contingency of " dirt is quick-fried " will be produced when having spark to produce.Lead fire
Various electrical appliances that line is in warehouse use electromagnetic switch, such as conveyer belt, blower fan, water pump, processing equipment or power because of
Starting or stoping of any electric products such as element compensation device.The blasting fuse ignited is eliminated the need for after using Switch without electric arc.
In painting factory, owing to needs use substantial amounts of Colophonium to dilute, normal workshop must keep well-ventilated,
Do not result in the accumulation of flammable liquid.It is, however, possible in winter, storm, interim overtime work, air is sultry, exhaust blower is former
The reasons such as barrier cause the imflammable gas concentration of workshop air constantly to increase, when concentration arrives certain proportion, if had at that time
Electromagnetic switch adhesive action will produce spark, causes the accident of blast.Use Switch without electric arc just can eliminate product pyrophoric
Hidden danger.
Only several specific embodiments of the present utility model disclosed above, but this utility model is not limited to this,
The changes that any person skilled in the art can think of all should fall into protection domain of the present utility model.
Claims (4)
1. the Switch without electric arc of an alternating current generator, it is characterised in that include forward conduction IGCT, reverse-conducting thyristor, side
Road relay, MCU single-chip microcomputer and control instruction, formed after described forward conduction IGCT and reverse-conducting thyristor reverse parallel connection
Thyristor groups, and described thyristor groups is in parallel with bypass relay；The public affairs that described thyristor groups is in parallel with bypass relay
Altogether end is connected with alternating current power supply, and described thyristor groups another common port in parallel with bypassing relay and alternating current generator connect
Connect；The control instruction input transmission command signal by MCU single-chip microcomputer, the outfan of described MCU single-chip microcomputer is to forward conduction
Signal is triggered in the control pole controlling pole and reverse-conducting thyristor of IGCT, and described MCU single-chip microcomputer is by its outfan control
System bypasses relay adhesive or opens.
The Switch without electric arc of alternating current generator the most according to claim 1, it is characterised in that this Switch without electric arc also includes triggering electricity
Road, the outfan of described MCU single-chip microcomputer is connected with the input triggering circuit, and the outfan of described MCU single-chip microcomputer is by touching
Power Generation Road triggers signal, and described MCU monolithic to the control pole controlling pole and reverse-conducting thyristor of forward conduction IGCT
The outfan of machine is by triggering circuit to bypass relay command signal.
The Switch without electric arc of alternating current generator the most according to claim 1, it is characterised in that the sun of described forward conduction IGCT
The common port of the connected formation of negative electrode of pole and reverse-conducting thyristor is connected with alternating current power supply, and described forward conduction crystalline substance lock
The common port of the negative electrode of pipe and the connected formation of the anode of reverse-conducting thyristor is connected with alternating current generator.
The Switch without electric arc of alternating current generator the most according to claim 1, it is characterised in that this Switch without electric arc also includes that voltage is examined
Slowdown monitoring circuit and current detection circuit, described voltage detecting circuit gathers the voltage of alternating current power supply, and described electricity by its input
The outfan of pressure testing circuit is connected with the input of MCU single-chip microcomputer；Described current detection circuit is handed over by its input collection
Flow the electric current of power supply, and the outfan of described current detection circuit is connected with the input of MCU single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620253266.1U CN205620728U (en) | 2016-03-30 | 2016-03-30 | AC motor's no arc switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620253266.1U CN205620728U (en) | 2016-03-30 | 2016-03-30 | AC motor's no arc switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205620728U true CN205620728U (en) | 2016-10-05 |
Family
ID=57031581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620253266.1U Active CN205620728U (en) | 2016-03-30 | 2016-03-30 | AC motor's no arc switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205620728U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11217993B2 (en) | 2019-03-27 | 2022-01-04 | Delta Electronics (Shanghai) Co., Ltd | Conversion system with high voltage side and low voltage side |
| US11394292B2 (en) | 2019-03-27 | 2022-07-19 | Delta Electronics (Shanghai) Co., Ltd | Power unit |
-
2016
- 2016-03-30 CN CN201620253266.1U patent/CN205620728U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11217993B2 (en) | 2019-03-27 | 2022-01-04 | Delta Electronics (Shanghai) Co., Ltd | Conversion system with high voltage side and low voltage side |
| US11394292B2 (en) | 2019-03-27 | 2022-07-19 | Delta Electronics (Shanghai) Co., Ltd | Power unit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |