CN109962460A - A kind of open phases of three-phase power source protection circuit and its phase failure protection method - Google Patents
A kind of open phases of three-phase power source protection circuit and its phase failure protection method Download PDFInfo
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- CN109962460A CN109962460A CN201910341059.XA CN201910341059A CN109962460A CN 109962460 A CN109962460 A CN 109962460A CN 201910341059 A CN201910341059 A CN 201910341059A CN 109962460 A CN109962460 A CN 109962460A
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- 238000000926 separation method Methods 0.000 claims abstract description 45
- 230000005611 electricity Effects 0.000 claims description 106
- 230000001012 protector Effects 0.000 description 9
- 238000012423 maintenance Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
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- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/253—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for multiphase applications, e.g. phase interruption
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/09—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
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- Emergency Protection Circuit Devices (AREA)
- Keying Circuit Devices (AREA)
Abstract
The embodiment of the invention discloses a kind of open phases of three-phase power source protection circuit and its phase failure protection methods, including first control unit, the second control unit and third control unit；A phase, three-phase motor and the second control unit of first control unit connection three phase mains；B phase, three-phase motor and the third control unit of second control unit connection three phase mains；C phase, three-phase motor and the first control unit of third control unit connection three phase mains.When first control unit detects A phase phase shortage, control the second control unit separation makes B phase disconnect separating with third control unit and disconnect C phase；When second control unit detects B phase phase shortage, control third control unit separation makes C phase disconnect separating with first control unit and disconnect A phase；When third control unit detects C phase phase shortage, control first control unit separation, which disconnects A phase, disconnects B phase with control the second control unit separation；Three-phase line can be cut off in time when faults itself leads to output end phase shortage in this way.
Description
Technical field
The present invention relates to electric driving force control fields more particularly to a kind of open phases of three-phase power source protection circuit and its phase shortage to protect
Maintaining method.
Background technique
It industrializes and be unable to do without electric driving force, electric driving force be unable to do without motor, and three-phase dynamic electricity machine is most popular
Electric driving force electric appliance.However, being easy to cause three-phase line phase shortage, three-phase due to the various reasons in power Transmission assigning process
Motor will phase-deficient operation, discovery then machine winding coil can be burned out not in time, need replacing maintenance motor, seriously affect work
Industry production.
How to cut off the power in time in circuit phase shortage protect motor be all the time electric driving force research problem.Mesh
Preceding three-phase circuit open phase protector mostly uses greatly rectification circuit, light idol transmission circuit, frequency converter, filter circuit, audio concussion
The electric elements such as circuit, diode, resistance, capacitor form extremely complex pile defection Control protection system, cost pole
Height, but protecting effect is unstable, this is because the complicated more faults itselfs of electric elements are more, to influence protection effect
Fruit is unfavorable for popularizing.Also, there is no phase shortages for the power input of some open phase protectors, after open phase protector
Power output end phase shortage instead.Circuit phase shortage caused by the failure of open phase protector itself can not also be solved in the prior art, out
The problem of phase shortage accident has manufactured phase shortage accident instead is not protected now.If repairing to open phase protector, maintenance is very
Troublesome and maintenance time is long, and maintenance cost is high.
Summary of the invention
In view of the above technical problems, the embodiment of the invention provides a kind of open phases of three-phase power source protection circuits and its phase shortage to protect
Maintaining method, circuit phase shortage caused by the failure to solve the problems, such as existing open phase protector itself.
The embodiment of the present invention provides a kind of open phases of three-phase power source protection circuit, connects three phase mains and three-phase motor, packet
Include the first control unit being integrated on a circuit controller, the second control unit and third control unit；
A phase, three-phase motor and the second control unit of first control unit connection three phase mains；Second control unit
Connect B phase, three-phase motor and the third control unit of three phase mains, the C phase of the third control unit connection three phase mains, three
Phase motor and first control unit；
When first control unit detects the input terminal phase shortage or output end phase shortage of A phase, control the second control unit separation makes B
It mutually disconnects, while the control third control unit separation of the second control unit disconnects C phase；
When second control unit detects the input terminal phase shortage or output end phase shortage of B phase, control third control unit separation makes C
It mutually disconnects, while third control unit control first control unit separation disconnects A phase；
When third control unit detects the input terminal phase shortage or output end phase shortage of C phase, control first control unit separation makes A
It mutually disconnects, while first control unit controls the separation of the second control unit and disconnects B phase.
Optionally, in open phases of three-phase power source protection circuit, the first control unit includes the first electromagnetic touch
Device, first electromagnetic contactor are equipped with the first electromagnetic coil and the first electromagnetism contact, and the first input terminal of the A phase connects
Connect one end of the first electromagnetism contact and the first coil terminal of the first electromagnetic coil；First outlet terminal connects the first electromagnetism contact
The other end, three-phase motor and the second control unit；Second coil terminals of the first electromagnetic coil connect third outlet terminal.
Optionally, in open phases of three-phase power source protection circuit, second control unit includes the second electromagnetic touch
Device, second electromagnetic contactor are equipped with the second electromagnetic coil and the second electromagnetism contact, and the second input terminal of the B phase connects
Connect one end of the second electromagnetism contact and the first coil terminal of the second electromagnetic coil；Second outlet terminal connects the second electromagnetism contact
The other end, three-phase motor and third control unit；Second coil terminals of the second electromagnetic coil connect the first outlet terminal.
Optionally, in open phases of three-phase power source protection circuit, the third control unit includes third electromagnetic touch
Device, the third electromagnetic contactor are equipped with third electromagnetic coil and third electromagnetism contact, and the third input terminal of the C phase connects
Connect one end of third electromagnetism contact and the first coil terminal of third electromagnetic coil；Third outlet terminal connects third electromagnetism contact
The other end, three-phase motor and the first electromagnetic coil the second coil terminals；Second coil terminals of third electromagnetic coil connect
Second outlet terminal.
It optionally, further include a normally opened button and a normally closed button in open phases of three-phase power source protection circuit；It is described
Normally opened button is arranged between third input terminal and the tertiary coil terminal of the first electromagnetic coil, and normally closed button is arranged in third
Between outlet terminal and the second coil terminals of the first electromagnetic coil；
The normally opened button is for opening open phases of three-phase power source protection circuit, and normally closed button is for closing open phases of three-phase power source
Protect circuit.
Optionally, in the described open phases of three-phase power source protection circuit, when the A phase phase shortage, the first input terminal makes without electricity
For the first coil terminal of first electromagnetic coil without electricity, the first electromagnetic coil, which takes off magnetic, flicks the first electromagnetism contact, and A phase, which disconnects, makes the
One outlet terminal makes the second electromagnetic coil take off magnetic, the second electromagnetism contact without electricity, the second coil terminals of the second electromagnetic coil without electricity
It flicks, B phase, which disconnects, makes the second outlet terminal without electricity, and the second coil terminals of third electromagnetic coil keep third electromagnetic coil de- without electricity
Magnetic, third electromagnetism contact flick, and C phase disconnects；
When the B phase phase shortage, the second input terminal makes the first coil terminal of the second electromagnetic coil without electricity, the second electricity without electricity
Magnetic coil, which takes off magnetic, flicks the second electromagnetism contact, and B phase, which disconnects, makes the second outlet terminal without electricity, the second coil of third electromagnetic coil
Terminal makes third electromagnetic coil take off magnetic without electricity, and third electromagnetism contact flicks, and C phase, which disconnects, makes third outlet terminal without electricity, the first electricity
Second coil terminals of magnetic coil make the first electromagnetic coil take off magnetic without electricity, and the first electromagnetism contact 3 flicks, and A phase disconnects；
When the C phase phase shortage, third input terminal makes the first coil terminal of third electromagnetic coil without electricity, third electricity without electricity
Magnetic coil, which takes off magnetic, flicks third electromagnetism contact, and C phase, which disconnects, makes third outlet terminal without electricity, the second coil of the first electromagnetic coil
Terminal makes the first electromagnetic coil take off magnetic without electricity, and the first electromagnetism contact flicks, and A phase, which disconnects, makes the first outlet terminal without electricity, the second electricity
Second coil terminals of magnetic coil make the second electromagnetic coil take off magnetic without electricity, and the second electromagnetism contact flicks, and B phase disconnects；
When the output end phase shortage of the A phase, the first outlet terminal without electricity make the second coil terminals of the second electromagnetic coil without
Electricity, the second electromagnetic coil, which takes off magnetic, flicks the second electromagnetism contact, and B phase, which disconnects, makes the second outlet terminal without electricity, third electromagnetic coil
The second coil terminals so that third electromagnetic coil is taken off magnetic without electricity, third electromagnetism contact flicks, and C phase disconnects.
It optionally, further include a button cap in open phases of three-phase power source protection circuit, the button cap connection first
Electromagnetism contact, the second electromagnetism contact and third electromagnetism contact；
The button cap makes the first electromagnetism contact, the second electromagnetism contact and third electromagnetism contact pad corresponding when being pressed
Input terminal and there is terminal, is connected to three phase mains；
The first electromagnetism contact, the second electromagnetism contact and third electromagnetism contact are according to corresponding electromagnetic coil when unclamping button cap
On-off electricity condition is by magnetic or flicks.
Second aspect of the embodiment of the present invention provides a kind of phase failure protection method of open phases of three-phase power source protection circuit, packet
It includes:
Step A, when detecting the input terminal phase shortage or output end phase shortage of A phase by first control unit, the second control of control
Unit separation disconnects B phase, while the control third control unit separation of the second control unit disconnects C phase；
Step B, when detecting the input terminal phase shortage or output end phase shortage of B phase by the second control unit, control third control
Unit separation disconnects C phase, while third control unit control first control unit separation disconnects A phase；
Step C, when detecting the input terminal phase shortage or output end phase shortage of C phase by third control unit, the first control of control
Unit separation disconnects A phase, while first control unit controls the separation of the second control unit and disconnects B phase.
In technical solution provided in an embodiment of the present invention, open phases of three-phase power source protects circuit connection three phase mains and three-phase electricity
Machine, including the first control unit, the second control unit and third unit module being integrated on a circuit controller；First control
A phase, three-phase motor and the second control unit of unit connection three phase mains；The B of the second control unit connection three phase mains
Phase, three-phase motor and third control unit, C phase, three-phase motor and the first control of the third control unit connection three phase mains
Unit processed；When first control unit detects the input terminal phase shortage or output end phase shortage of A phase, control the second control unit separation makes B
It mutually disconnects, while the control third control unit separation of the second control unit disconnects C phase；Second control unit detects the defeated of B phase
When entering to hold phase shortage or output end phase shortage, control third control unit separation disconnects C phase, while third control unit control first
Control unit separation disconnects A phase；When third control unit detects the input terminal phase shortage or output end phase shortage of C phase, control first
Control unit separation disconnects A phase, while first control unit controls the separation of the second control unit and disconnects B phase.Any phase
Power phase shortage can all drive other two-phase power supply to be cut off, while can also cut off in time when faults itself leads to output end phase shortage
Three-phase line, so that it is guaranteed that electric appliance is not destroyed.
Detailed description of the invention
Fig. 1 is the circuit diagram that open phases of three-phase power source protects circuit in the embodiment of the present invention.
Fig. 2 is the phase failure protection method flow chart that open phases of three-phase power source protects circuit in the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.This hair
Embodiment in bright, those skilled in the art's every other embodiment obtained without creative efforts,
It shall fall within the protection scope of the present invention.
Referring to Fig. 1, open phases of three-phase power source protection circuit connection three phase mains provided in an embodiment of the present invention and three-phase electricity
Machine, the open phases of three-phase power source protection circuit include the first control unit being integrated on a circuit controller, the second control list
Member and third control unit, A phase, three-phase motor and the second control unit of the first control unit connection three phase mains；Institute
State B phase, three-phase motor and the third control unit of the second control unit connection three phase mains；The third control unit connection three
C phase, three-phase motor and the first control unit of phase power supply；(input terminal phase shortage is defeated for the first control unit detection A phase phase shortage
Outlet phase shortage) when, control the second control unit separation disconnects B phase, while the second control unit control third control unit point
From disconnecting C phase.The separation of control third control unit disconnects C phase when second control unit detects B phase phase shortage, while third control
Unit control first control unit separation processed disconnects A phase.Third control unit controls first control unit when detecting C phase phase shortage
Separation disconnects A phase, while first control unit controls the separation of the second control unit and disconnects B phase.Any phase power phase shortage
Other two-phase power supply will be driven to be cut off, and can also cut off triple line in time when faults itself leads to output end phase shortage
Road, so that it is guaranteed that electric appliance is not destroyed.
Wherein, the input terminal (power input) of A phase, B phase, C phase respectively corresponds as the first input terminal 1, the second inlet wire
Terminal 3, third input terminal 5；The output end (power output end) of A phase, B phase, C phase respectively corresponds as the first outlet terminal 2,
Two outlet terminals 4, third outlet terminal 6.
In the present embodiment, the first control unit includes the first electromagnetic contactor A1, the first electromagnetic contactor A1
It is equipped with the first electromagnetic coil A2 and the first electromagnetism contact A3, the first input terminal 1 of the A phase connects the first electromagnetism contact A3
One end and the first electromagnetic coil A2 first coil terminal 11；First outlet terminal 2 connects the another of the first electromagnetism contact A3
End (being abutted against by contact contact, when no electricity does not collide), three-phase motor and the second control unit；The second of first electromagnetic coil A2
Coil terminals 61 connect third outlet terminal 6.
The both ends of the first electromagnetism contact A3 are equipped with contact contact (semicircle shown in Fig. 1), 1 He of the first input terminal
One end of first outlet terminal 2, which is respectively set a contact contact and two contacts of the first electromagnetism contact A3 contact is corresponding, to be touched
It connects.(there is electricity) when thering is electric current to flow through on the first electromagnetic coil A2, generates the first electromagnetism contact A3 described in magnetic force magnetic, the
The Magnetic force tracting that one electromagnetism contact A3 is generated by the first electromagnetic coil A2 shifts, and touches corresponding contact contact to be connected to A
Mutually to three-phase motor route, meanwhile, 2 out-put supply of the first outlet terminal to the second control unit.First electromagnetic coil A2 has
When electric, 61 out-put supply of the second coil terminals to third outlet terminal 6.
Second control unit includes that the second electromagnetic contactor B1, the second electromagnetic contactor B1 is equipped with the second electricity
Magnetic coil B2 and the second electromagnetism contact B3, the second input terminal 3 of the B phase connect one end and second of the second electromagnetism contact B3
The first coil terminal 31 of electromagnetic coil B2；The other end that second outlet terminal 4 connects the second electromagnetism contact B3 (is touched by contact
Point is abutted against, and when no electricity does not collide), three-phase motor and third control unit；The second coil terminals 21 of second electromagnetic coil B2 connect
Connect the first outlet terminal 2.
The both ends of the second electromagnetism contact B3 are equipped with contact contact (semicircle shown in Fig. 1), 3 He of the second input terminal
One end of second outlet terminal 4, which is respectively set a contact contact and two contacts of the second electromagnetism contact B3 contact is corresponding, to be touched
It connects.(there is electricity) when thering is electric current to flow through on the second electromagnetic coil B2, generates the second electromagnetism contact B3 described in magnetic force magnetic, the
The Magnetic force tracting that two electromagnetism contact B3 are generated by the second electromagnetic coil B2 shifts, and corresponding contact contact is made to abut against to be connected to B
Mutually to three-phase motor route, meanwhile, 4 out-put supply of the second outlet terminal to third control unit.Second electromagnetic coil B2 has
When electric, 21 out-put supply of the second coil terminals to the first outlet terminal 2.
The third control unit includes third electromagnetic contactor C1, and the third electromagnetic contactor C1 is equipped with third electricity
The third input terminal 5 of magnetic coil C2 and third electromagnetism contact C3, the C phase connect one end and the third of third electromagnetism contact C3
The first coil terminal 51 of electromagnetic coil C2；The other end that third outlet terminal 6 connects third electromagnetism contact C3 (is touched by contact
Point is abutted against, and when no electricity does not collide), the second coil terminals 61 of three-phase motor and the first electromagnetic coil A2；Third electromagnetic coil C2
The second coil terminals 41 connect the second outlet terminal 4.
The both ends of the third electromagnetism contact C3 are equipped with contact contact (semicircle shown in Fig. 1), 5 He of third input terminal
One end of third outlet terminal 6, which is respectively set a contact contact and two contacts of third electromagnetism contact C3 contact is corresponding, to be touched
It connects.(there is electricity) when thering is electric current to flow through on third electromagnetic coil C2, generates third electromagnetism contact C3 described in magnetic force magnetic, the
The Magnetic force tracting that three electromagnetism contact C3 are generated by third electromagnetic coil C2 shifts, and corresponding contact contact is made to abut against to be connected to C
Mutually to three-phase motor route, meanwhile, the second coil terminals of 6 out-put supply of third outlet terminal to the first electromagnetic coil A2
61.When third electromagnetic coil C2 has electricity, 41 out-put supply of the second coil terminals to the second outlet terminal 4.
The present embodiment on the A phase, B phase, C phase route of three phase mains by being respectively set an electromagnetic contactor, Fig. 1
In, 1 connection, 11,3 connection, 31,5 connection, 51,2 connection, 21,4 connection, 41,6 connection 61.Electromagnetic coil in normal operation
A2, B2, C2 energization generate electromagnetic force and corresponding electromagnetism contact A3, B3, C3 are sucked respectively, are connected to AA ', BB ', CC ' three-phase line.
A phase is connected to by its first electromagnetic coil A2 magnetic the first electromagnetism contact A3 in the first electromagnetic contactor A1 that A phase is arranged
Route；B is connected to by its second electromagnetic coil B2 magnetic the second electromagnetism contact B3 in the second electromagnetic contactor B1 that B phase is arranged
Phase line；Connected in the third electromagnetic contactor C1 that C phase is arranged by its third electromagnetic coil C2 magnetic third electromagnetism contact C3
Logical C phase line.
Every two phase line combines one electromagnetic coil of composition, i.e. A phase and B phase composition solenoid controlled B phase, B phase and C phase
Solenoid controlled C phase, C phase and A phase composition solenoid controlled A phase are formed, every two combine a control wherein phase, tie mutually
Conjunction checks and balance, and the effect of control and revertive control can be realized, and any phase power phase shortage all can related other two-phase power supply quilt
Cutting.
The working principle of the open phases of three-phase power source protection circuit are as follows:
Situation one, when input terminal power phase shortage occurs:
If A phase phase shortage, the first input terminal 1 is without electricity, and the first coil terminal 11 of the first electromagnetic coil A2 is also without electricity,
One electromagnetic coil A2 takes off magnetic, and the first electromagnetism contact A3 flicks (A phase disconnects)；First outlet terminal 2 is without electricity, then the second electromagnetic coil
For the second coil terminals 21 of B2 without electricity, the second electromagnetic coil B2 takes off magnetic, and the second electromagnetism contact B3 flicks (B phase disconnects)；Second goes out
Line terminals 4 are without electricity, and for the second coil terminals 41 of third electromagnetic coil C2 without electricity, third electromagnetic coil C2 takes off magnetic, the touching of third electromagnetism
Piece C3 flicks (C phase disconnects).
If B phase phase shortage, the second input terminal 3 is without electricity, and the first coil terminal 31 of the second electromagnetic coil B2 is without electricity, second
Electromagnetic coil B2 takes off magnetic, and the second electromagnetism contact B3 flicks (B phase disconnects)；Second outlet terminal 4 without electricity, third electromagnetic coil C2's
For second coil terminals 41 without electricity, third electromagnetic coil C2 takes off magnetic, and third electromagnetism contact C3 flicks (C phase disconnects)；Third leading-out terminal
Son 6 is without electricity, and for the second coil terminals 61 of the first electromagnetic coil A2 without electricity, the first electromagnetic coil A2 takes off magnetic, the first electromagnetism contact A3
Flick (A phase disconnects).
If C phase phase shortage, third input terminal 5 is without electricity, and the first coil terminal 51 of third electromagnetic coil C2 is without electricity, third
Electromagnetic coil C2 takes off magnetic, and third electromagnetism contact C3 flicks (C phase disconnects)；Third outlet terminal 6 without electricity, the first electromagnetic coil A2's
For second coil terminals 61 without electricity, the first electromagnetic coil A2 takes off magnetic, and the first electromagnetism contact A3 flicks (A phase disconnects)；First leading-out terminal
Son 2 is without electricity, and for the second coil terminals 21 of the second electromagnetic coil B2 without electricity, the second electromagnetic coil B2 takes off magnetic, the second electromagnetism contact B3
Flick (B phase disconnects).
Situation two, when faults itself, which occurs, leads to output end power phase shortage:
If A ' phase phase shortage (A phase fault is already off), the first outlet terminal 2 is without electricity, the second of the second electromagnetic coil B2
For coil terminals 21 without electricity, the second electromagnetic coil B2 takes off magnetic, and the second electromagnetism contact B3 flicks (B phase disconnects)；Second outlet terminal, 4 nothing
Electricity, for the second coil terminals 41 of third electromagnetic coil C2 without electricity, third electromagnetic coil C2 takes off magnetic, and third electromagnetism contact C3 flicks (C
It mutually disconnects).
If B ' phase phase shortage (B phase fault is already off), the second outlet terminal 4 is without electricity, the second of third electromagnetic coil C2
For coil terminals 41 without electricity, third electromagnetic coil C2 takes off magnetic, and third electromagnetism contact C3 flicks (C phase disconnects)；6 nothing of third outlet terminal
Electricity, for the tertiary coil terminal 61 of the first electromagnetic coil A2 without electricity, the first electromagnetic coil A2 takes off magnetic, and the first electromagnetism contact A3 flicks (A
It mutually disconnects).
If C ' phase phase shortage (C phase fault is already off), third outlet terminal 6 is without electricity, the second of the first electromagnetic coil A2
For coil terminals 61 without electricity, the first electromagnetic coil A2 takes off magnetic, and the first electromagnetism contact A3 flicks (A phase disconnects)；First outlet terminal, 2 nothing
Electricity, for the second coil terminals 21 of the second electromagnetic coil B2 without electricity, the second electromagnetic coil B2 takes off magnetic, and the second electromagnetism contact B3 flicks (B
It mutually disconnects).
In further embodiment, first electromagnetic coil A2 of the connection control line to A phase on the third input terminal 5 of C phase
Tertiary coil terminal 52 on (61 and 52 be actually same coil terminals, is separately for the ease of distinguishing and illustrating herein),
A normally opened button D is accessed on the route of the tertiary coil terminal 52 of 5 to the first electromagnetic coil A2 of third input terminal, third goes out
A normally closed button E is accessed on 61 route of the second coil terminals of 6 to the first electromagnetic coil A2 of line terminals, thus becomes one
Three-phase electric apparatus switch.It presses normally opened button D and has turned on this three-phase electric apparatus switch, press normally closed button E and be shut off this three-phase
Electric switch.According to the electric appliance instrument that the mode of connection of the present embodiment manufactures be both three-phase contactor and three-phase line phase shortage is protected
Device is protected, has been also compatible with three-phase electric apparatus control switch, multi-use is economical and practical, securely and reliably.
It is to be appreciated that the open phases of three-phase power source protection circuit is integrated in the inside of circuit controller, circuit control
The shell of device processed is similar to existing A.C. contactor, this is the prior art.In further embodiment, it can also use and press manually
Pressure mode substitutes above-mentioned key control mode (i.e. normally opened button D, normally closed button E and 5-52 route), i.e., the described three-phase
It further includes a button cap that power phase shortage, which protects circuit, and the button cap connects the first electromagnetism contact, the second electromagnetism contact and third
Top (the bullet that three springs are separately connected each electromagnetism contact can be arranged in the bottom of button cap in electromagnetism contact, connection type
Spring connects when being in nature elongation state).Cover top portion is arranged a cavity and is used for placing key-press cap, and electricity is exposed at the top of button cap
The shell of road controller is so as to energy Manual press.Inside the shell due to electromagnetism contact card, button cap can be after being connected by spring
It moves up and down in cavity without departing from shell.When pressing the button cap, each electromagnetism contact of spring downward makes the first input terminal 1
It is connected with the first outlet terminal 2, the second input terminal 3 and the second outlet terminal 4 are connected, third input terminal 5 and third outlet
Terminal 6 is connected, and is respectively communicated with 3 phases, the first electromagnetic coil A2 to third electromagnetic coil C2 has been powered at this time.Then key is unclamped
Cap, circuit controller work by electromagnet (as shown in the horizontal line being inserted into inside each electromagnetic coil in Fig. 1), and each electromagnetism contact is bullet
It opens or contact is controlled by the on-off electricity condition of electromagnetic coil, (corresponding open phases of three-phase power source guarantor is automatically cut off when route phase shortage
The working principle of protection circuit).
Existing three-phase contactor is all that an electromagnetic coil drives electromagnet while attracting and decontroling three electromagnetism contacts,
One logical 3 Xiang Doutong, disconnected 3 phases are all disconnected.And three electromagnetism contacts of magnetically attractive are distinguished using 3 electromagnetic coils in the present embodiment, each
All mutually indepedent, but any one conducting will drive that another is logical, one disconnected to drive another disconnected, checks and balance.
It is to be appreciated that 5~52 routes be it is normally opened obstructed, press normally opened button D starting open phases of three-phase power source and protect
Protection circuit, leans on 6~61 line works after starting, the normally closed button E being arranged on 6~61 routes is pressed in normal operation
Then disconnect 6~61 routes.6 be without electricity, so to connect 5 energizations starting before starting.6 have electricity after starting, lean on 6~61
Work.5~52 only start needs.Circuit shown in FIG. 1 can be in any three-phase contactor, threephase switch, and three-phase motor lacks
It is used on phase protector.
Circuit is protected based on above-mentioned open phases of three-phase power source, the present invention also provides a kind of open phases of three-phase power source protection circuits
Phase failure protection method, referring to Fig. 2, the phase failure protection method includes:
S10, when detecting the input terminal phase shortage or output end phase shortage of A phase by first control unit, the second control of control is single
Member separation disconnects B phase, while the control third control unit separation of the second control unit disconnects C phase；
S20, when detecting the input terminal phase shortage or output end phase shortage of B phase by the second control unit, control third control is single
Member separation disconnects C phase, while third control unit control first control unit separation disconnects A phase；
S30, when detecting the input terminal phase shortage or output end phase shortage of C phase by third control unit, the first control of control is single
Member separation disconnects A phase, while first control unit controls the separation of the second control unit and disconnects B phase.
It is to be appreciated that above three step be it is arranged side by side, when the triggering of the testing conditions of any step, execute pair
The step of answering.
In conclusion open phases of three-phase power source protection circuit provided by the invention and its phase failure protection method, using electric appliance control
The line connection that device input terminal power supply and output end power processed combine quotes appliance controller out-put supply with appliance controller
Input power combines the control carried out to appliance controller itself, can also cut off three-phase line in time in faults itself, really
It is not destroyed to protect electric appliance, to solve the problems, such as that existing three-phase line open phase protector faults itself leads to circuit phase shortage；Also,
It is respectively connected to an electromagnetic coil in three phases, each electromagnetic coil is correspondingly arranged an electromagnetism contact control wherein phase, dashes forward
The method that conventional three-phase route is arranged three electromagnetism contacts with electromagnetic coil while controlling three-phase is broken, to make three mutual
The technology of control is achieved.Meanwhile circuit of the present invention is simple, electric elements are less, and cost is relatively low；The electric appliance of mode of connection manufacture
Instrument is both three-phase contactor and three-phase line open phase protector or three-phase electric apparatus control switch, and it is more to realize a device
With.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
Invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (9)
1. a kind of open phases of three-phase power source protects circuit, three phase mains and three-phase motor are connected, which is characterized in that including being integrated in one
First control unit, the second control unit and third control unit on circuit controller；
A phase, three-phase motor and the second control unit of first control unit connection three phase mains；The second control unit connection
B phase, three-phase motor and the third control unit of three phase mains；C phase, the three-phase electricity of the third control unit connection three phase mains
Machine and first control unit；
When first control unit detects the input terminal phase shortage or output end phase shortage of A phase, control the second control unit separation makes B phase break
It opens, while the control third control unit separation of the second control unit disconnects C phase；
When second control unit detects the input terminal phase shortage or output end phase shortage of B phase, control third control unit separation makes C phase break
It opens, while third control unit control first control unit separation disconnects A phase；
When third control unit detects the input terminal phase shortage or output end phase shortage of C phase, control first control unit separation makes A phase break
It opens, while first control unit controls the separation of the second control unit and disconnects B phase.
2. open phases of three-phase power source according to claim 1 protects circuit, which is characterized in that the first control unit includes
First electromagnetic contactor, first electromagnetic contactor are equipped with the first electromagnetic coil and the first electromagnetism contact, and the of the A phase
One input terminal connects one end of the first electromagnetism contact and the first coil terminal of the first electromagnetic coil；The connection of first outlet terminal
The other end, three-phase motor and the second control unit of first electromagnetism contact；The second coil terminals connection the of first electromagnetic coil
Three outlet terminals.
3. open phases of three-phase power source according to claim 2 protects circuit, which is characterized in that second control unit includes
Second electromagnetic contactor, second electromagnetic contactor are equipped with the second electromagnetic coil and the second electromagnetism contact, and the of the B phase
Two input terminals connect one end of the second electromagnetism contact and the first coil terminal of the second electromagnetic coil；The connection of second outlet terminal
The other end, three-phase motor and the third control unit of second electromagnetism contact；The second coil terminals connection the of second electromagnetic coil
One outlet terminal.
4. open phases of three-phase power source according to claim 3 protects circuit, which is characterized in that the third control unit includes
Third electromagnetic contactor, the third electromagnetic contactor are equipped with third electromagnetic coil and third electromagnetism contact, and the of the C phase
Three input terminals connect one end of third electromagnetism contact and the first coil terminal of third electromagnetic coil；The connection of third outlet terminal
Second coil terminals of the other end of third electromagnetism contact, three-phase motor and the first electromagnetic coil；The second of third electromagnetic coil
Coil terminals connect the second outlet terminal.
5. open phases of three-phase power source according to claim 4 protects circuit, which is characterized in that further include a normally opened button and one
Normally closed button；The normally opened button is arranged between third input terminal and the tertiary coil terminal of the first electromagnetic coil, normally closed
Button is arranged between third outlet terminal and the second coil terminals of the first electromagnetic coil；
The normally opened button is for opening open phases of three-phase power source protection circuit, and normally closed button is for closing open phases of three-phase power source protection
Circuit.
6. open phases of three-phase power source according to claim 4 protects circuit, which is characterized in that when the A phase phase shortage, first into
Line terminals make the first coil terminal of the first electromagnetic coil without electricity without electricity, and the first electromagnetic coil, which takes off magnetic, makes the first electromagnetism contact bullet
It opens, A phase, which disconnects, makes the first outlet terminal without electricity, and the second coil terminals of the second electromagnetic coil keep the second electromagnetic coil de- without electricity
Magnetic, the second electromagnetism contact flick, and B phase, which disconnects, makes the second outlet terminal without electricity, and the second coil terminals of third electromagnetic coil are without electricity
Third electromagnetic coil is set to take off magnetic, third electromagnetism contact flicks, and C phase disconnects；
When the B phase phase shortage, the second input terminal makes the first coil terminal of the second electromagnetic coil without electricity, the second electromagnetic wire without electricity
Enclosing de- magnetic flicks the second electromagnetism contact, and B phase, which disconnects, makes the second outlet terminal without electricity, the second coil terminals of third electromagnetic coil
No electricity makes third electromagnetic coil take off magnetic, and third electromagnetism contact flicks, and C phase, which disconnects, makes third outlet terminal without electricity, the first electromagnetic wire
Second coil terminals of circle make the first electromagnetic coil take off magnetic without electricity, and the first electromagnetism contact 3 flicks, and A phase disconnects；
When the C phase phase shortage, third input terminal makes the first coil terminal of third electromagnetic coil without electricity, third electromagnetic wire without electricity
Enclosing de- magnetic flicks third electromagnetism contact, and C phase, which disconnects, makes third outlet terminal without electricity, the second coil terminals of the first electromagnetic coil
No electricity makes the first electromagnetic coil take off magnetic, and the first electromagnetism contact flicks, and A phase, which disconnects, makes the first outlet terminal without electricity, the second electromagnetic wire
Second coil terminals of circle make the second electromagnetic coil take off magnetic without electricity, and the second electromagnetism contact flicks, and B phase disconnects.
7. open phases of three-phase power source according to claim 4 protects circuit, which is characterized in that the output end phase shortage of the A phase
When, the first outlet terminal makes the second coil terminals of the second electromagnetic coil without electricity without electricity, and the second electromagnetic coil, which takes off magnetic, makes the second electricity
Magnetic contact flicks, and B phase, which disconnects, makes the second outlet terminal without electricity, and the second coil terminals of third electromagnetic coil make third electromagnetism without electricity
Coil takes off magnetic, and third electromagnetism contact flicks, and C phase disconnects；
When the output end phase shortage of the B phase, the second outlet terminal makes the second coil terminals of third electromagnetic coil without electricity without electricity, the
Three electromagnetic coils, which take off magnetic, flicks third electromagnetism contact, and C phase, which disconnects, makes third outlet terminal without electricity, the third of the first electromagnetic coil
Coil terminals make the first electromagnetic coil take off magnetic without electricity, and the first electromagnetism contact flicks, and A phase disconnects；
When the output end phase shortage of the C phase, third outlet terminal makes the second coil terminals of the first electromagnetic coil without electricity without electricity, the
One electromagnetic coil, which takes off magnetic, flicks the first electromagnetism contact 3, and A phase, which disconnects, makes the first outlet terminal without electricity, and the of the second electromagnetic coil
Two coil terminal makes the second electromagnetic coil take off magnetic without electricity, and the second electromagnetism contact flicks, and B phase disconnects.
8. open phases of three-phase power source according to claim 4 protects circuit, which is characterized in that it further include a button cap, it is described
Button cap connects the first electromagnetism contact, the second electromagnetism contact and third electromagnetism contact；
The button cap makes the first electromagnetism contact, the second electromagnetism contact and third electromagnetism contact pad corresponding inlet wire when being pressed
Terminal and there is terminal, is connected to three phase mains；
The first electromagnetism contact, the second electromagnetism contact and third electromagnetism contact are according to the on-off for corresponding to electromagnetic coil when unclamping button cap
Electricity condition is by magnetic or flicks.
9. a kind of phase failure protection method using open phases of three-phase power source described in claim 1 protection circuit, which is characterized in that packet
It includes:
Step A, when detecting the input terminal phase shortage or output end phase shortage of A phase by first control unit, the second control unit is controlled
Separation disconnects B phase, while the control third control unit separation of the second control unit disconnects C phase；
Step B, when detecting the input terminal phase shortage or output end phase shortage of B phase by the second control unit, third control unit is controlled
Separation disconnects C phase, while third control unit control first control unit separation disconnects A phase；
Step C, when detecting the input terminal phase shortage or output end phase shortage of C phase by third control unit, first control unit is controlled
Separation disconnects A phase, while first control unit controls the separation of the second control unit and disconnects B phase.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910341059.XA CN109962460B (en) | 2019-04-25 | 2019-04-25 | Three-phase power supply open-phase protection circuit and open-phase protection method thereof |
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| CN201910341059.XA CN109962460B (en) | 2019-04-25 | 2019-04-25 | Three-phase power supply open-phase protection circuit and open-phase protection method thereof |
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|---|---|
| CN109962460B (en) | 2024-06-14 |
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