CN106546832A - A kind of detection means and its using method of three phase mains - Google Patents
A kind of detection means and its using method of three phase mains Download PDFInfo
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- CN106546832A CN106546832A CN201611120498.0A CN201611120498A CN106546832A CN 106546832 A CN106546832 A CN 106546832A CN 201611120498 A CN201611120498 A CN 201611120498A CN 106546832 A CN106546832 A CN 106546832A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
- G01R31/42—AC power supplies
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses the detection means and its using method of a kind of three phase mains, the device includes：Phase sequence acquiring unit (2) and controller (3)；Wherein, the phase sequence acquiring unit (2), setting is adapted to the three phase mains of no zero line, for the phase power supply in three phase mains as voltage reference point, obtaining the current phase sequence that the another two-phase power supply in three phase mains is in turn switched on by preset phase angle；The controller (3), is adapted to setting with the phase sequence acquiring unit (2), for determining whether the current phase sequence is consistent with setting phase sequence；And, when the current phase sequence is consistent with the setting phase sequence, determine that the wiring of three phase mains is correct；Or when the current phase sequence is inconsistent with the setting phase sequence, determine the wiring error of three phase mains.The solution of the present invention, can overcome that detection in prior art is inconvenient, reliability is low and the defect such as poor user experience, realize the beneficial effect that easy to detect, reliability is high and Consumer's Experience is good.
Description
Technical field
The invention belongs to power detecting technical field, and in particular to a kind of detection means of three phase mains and its user
Method, more particularly to a kind of three-phase alternating-current supply do not have the circuit of testing the phase sequence of zero line and using the circuit to no zero line
The method that three-phase alternating-current supply carries out Phase sequence detection.
Background technology
Frequency is identical, amplitude is equal by three, the power supply that the exchange potential of phase place 120 degree of electrical angles of mutual deviation successively is constituted,
Referred to as three-phase alternating-current supply.Domestic three phase mains (i.e. three-phase alternating-current supply) is typically all have zero line, and lathe is supplied to
The no zero line of the three phase mains of oil cooling machine.Three phase mains access oil cooling machine when, in order to prevent artificial wrong three-phase power line
Cause oil cooling machine to burn, it is desirable to provide a kind of three-phase power supply phase sequence detection circuit for not having zero line, protect the oil cooling machine will not be because
Wrong line and burn, and traditional three-phase power detection circuit carry zero line.
Example shown in Figure 1, prior art are all based on the detection of the three-phase power supply phase sequence with zero line, national three-phase
Electrical network all has zero line, and the three phase mains with zero line is not just had zero after power regulator and mains transformer by user
Line, so electrical equipment needs the three-phase power supply phase sequence to not having zero line to detect, in case artificially causing wrong power line
And then cause to burn out electrical equipment.
In prior art, have that detection is inconvenient, reliability is low and the defect such as poor user experience.
The content of the invention
It is an object of the present invention to be directed to drawbacks described above, there is provided a kind of detection means and its using method of three phase mains,
To solve the problems, such as that three-phase power detection circuit causes detection inconvenient with zero line in prior art, reaches effect easy to detect
Really.
The present invention provides a kind of detection means of three phase mains, including：Phase sequence acquiring unit and controller；Wherein, it is described
Phase sequence acquiring unit, is adapted to setting with the three phase mains of no zero line, for the phase power supply in the three phase mains
For voltage reference point, the current phase sequence that the another two-phase power supply in the three phase mains is in turn switched on by preset phase angle is obtained；Institute
Controller is stated, setting is adapted to the phase sequence acquiring unit, for determining whether the current phase sequence is consistent with setting phase sequence；With
And, when the current phase sequence is consistent with the setting phase sequence, determine that the wiring of the three phase mains is correct；Or when described current
When phase sequence is inconsistent with the setting phase sequence, the wiring error of the three phase mains is determined.
Alternatively, the controller, is additionally operable to when the wiring error of the three phase mains, based on the current sequential,
Whether arbitrary phase power supply access failure is had in determining the another two-phase power supply；And, it is arbitrary mutually electric when having in the another two-phase power supply
During the access failure of source, arbitrary phase power phase shortage of access failure in the another two-phase power supply is determined.
Alternatively, the phase sequence acquiring unit, when being additionally operable to obtain the connection of arbitrary phase power supply in the another two-phase power supply
It is long；Whether the controller, be additionally operable to determine the connection duration of an at least phase power supply in the another two-phase power supply more than pre-
If duration；And, when the connection duration of an at least phase power supply in the another two-phase power supply is more than the preset duration, really
It is set for the phase power phase shortage for the voltage reference point.
Alternatively, the controller, is also adapted to setting with the three phase mains, wrong for the wiring when the three phase mains
By mistake, in the another two-phase power supply, arbitrary phase power phase shortage of access failure, the phase power supply as the voltage reference point lack
During at least one of phase, export default failure alarm signal, and/or the three phase mains is carried out by default protected mode
Protection.
Alternatively, the controller, is additionally operable to after protecting to the three phase mains by default protected mode,
To arbitrary phase in the three phase mains whether wiring error, and/or the three phase mains, whether phase shortage carries out continuation determination, until
When the wiring of the three phase mains is correct, the protected mode is exited.
Alternatively, the phase sequence acquiring unit, including：Current limliting module, afterflow module and light-coupled isolation transport module；Its
In, the quantity of the current limliting module is three；The first end of each current limliting module, adaptation are arranged in the three phase mains
A phase power supply；The quantity of the afterflow module is two；The negative electrode of each afterflow module, is connected to another biphase with described
Second end of the current limliting module that the phase power adaptation in power supply is arranged；The anode of each afterflow module, is connected to
Second end of the current limliting module arranged with the phase power adaptation as the voltage reference point；The light-coupled isolation
The quantity of transport module is two；The anode of each light-coupled isolation transport module input side, with the afterflow mould being adapted to
The negative electrode connection of block；The negative electrode of each light-coupled isolation transport module input side, the anode with the afterflow module being adapted to
Connection；The colelctor electrode of each light-coupled isolation transport module outlet side, is connected with default DC source；Each described optocoupler
The emitter stage of isolated transmission module outlet side, is connected with the controller.
Alternatively, the phase sequence acquiring unit, also includes：At least one of pull-up module, drop-down module；Wherein, it is described
Pull-up module, adaptation are arranged between the colelctor electrode and the DC source of the light-coupled isolation transport module outlet side；With/
Or, the drop-down module, is adapted to and is arranged between the emitter stage and the controller of the light-coupled isolation transport module outlet side.
Alternatively, also include：Three phase mains accesses at least one of part, communication component, guard block；Wherein, it is described
Three phase mains accesses part, is adapted to setting with the phase sequence acquiring unit, for accessing the three-phase of the three phase mains, and connects
To the phase sequence acquiring unit；And/or, the communication component is adapted to setting with the controller, defeated for working as the controller
When going out default failure alarm signal, the communication connection set up between the controller and default client and/or display screen,
To realize the information exchange between the controller and the client；And/or, the guard block, with the three phase mains
Arrange with controller adaptation, for protecting to the three phase mains by default protected mode when the controller
When, the protection to the three phase mains is realized under the control of the controller.
Alternatively, wherein, the three phase mains accesses part, including：Needle stand；And/or, the controller, including：MCU、
At least one of single-chip microcomputer, DSP signal deteching circuits；And/or, the three phase mains of no zero line, including：The phase angle
120 ° of L1 phase power supplys, L2 phases power supply and L3 phase power supplys are differed successively；Wherein, as a phase power supply of the voltage reference point it is
The L1 phases power supply, the another two-phase power supply are the L2 phases power supply and the L3 phases power supply.
Match with said apparatus, another aspect of the present invention provides a kind of using method of the detection means of three phase mains,
Including：Using the detection means of above-described three phase mains, with the phase power supply in the three phase mains of no zero line it is
Voltage reference point, obtains the current phase sequence that the another two-phase power supply in the three phase mains is in turn switched on by preset phase angle；It is determined that
Whether the current phase sequence is consistent with setting phase sequence；And, when the current phase sequence is consistent with the setting phase sequence, determine institute
The wiring for stating three phase mains is correct；Or when the current phase sequence is inconsistent with the setting phase sequence, determine the three phase mains
Wiring error.
Alternatively, also include：When the wiring error of the three phase mains, based on the current sequential, determine described another
Whether arbitrary phase power supply access failure is had in two-phase power supply；And, when having arbitrary phase power supply access failure in the another two-phase power supply,
Determine arbitrary phase power phase shortage of access failure in the another two-phase power supply.
Alternatively, also include：Obtain the connection duration of arbitrary phase power supply in the another two-phase power supply；Determine described another biphase
In power supply, whether the connection duration of an at least phase power supply is more than preset duration；And, when in the another two-phase power supply at least
When the connection duration of one phase power supply is more than the preset duration, the phase power supply of the voltage reference point is determined as
Phase shortage.
Alternatively, also include：Arbitrary phase of access failure in wiring error, the another two-phase power supply when the three phase mains
Power phase shortage, as the voltage reference point an at least one of phase power phase shortage when, export default fault alarm
Signal, and/or the three phase mains is protected by default protected mode.
Alternatively, also include：After protecting to the three phase mains by default protected mode, to the three-phase
Power supply whether in wiring error, and/or the three phase mains arbitrary phase whether phase shortage carries out continuation determination, until the three-phase electricity
When the wiring in source is correct, the protected mode is exited.
The solution of the present invention, by, in the case of no zero line, whether detection three-phase power supply phase sequence is correct, if lack
Phase, can reach the purpose of the three-phase power supply phase sequence detection for not having zero line, realize that the three-phase power supply phase sequence to not having zero line is carried out
Detection, detection convenience are good, in case artificially causing wrong power line and then causing to burn out electrical equipment.
Further, the solution of the present invention, the three-phase electricity constituted by light-coupled isolation transmission circuit and DSP signal deteching circuits
Source is input into circuit of testing the phase sequence, has the three-phase power supply phase sequence detection circuit of zero line relative to tradition, be exactly mainly without zero line, its
Secondary is exactly that circuit design is simple and practical, easy to detect, and reliability is high.
Thus, the solution of the present invention, by be mainly made up of light-coupled isolation transmission circuit and DSP signal deteching circuits three
Phase power input circuit of testing the phase sequence, in the case of no zero line, whether detection three-phase power supply phase sequence correct, whether phase shortage,
In solving the problems, such as prior art, three-phase power detection circuit causes detection inconvenient with zero line, so as to overcome prior art
Middle detection is inconvenient, reliability is low and the defect of poor user experience, and realizing that easy to detect, reliability is high and Consumer's Experience is good has
Beneficial effect.
Other features and advantages of the present invention will be illustrated in the following description, also, partly be become from description
Obtain it is clear that or being understood by implementing the present invention.
Below by drawings and Examples, technical scheme is described in further detail.
Description of the drawings
Fig. 1 is the theory diagram that traditional three phase mains for having zero line is input into circuit of testing the phase sequence；
Fig. 2 is the detection means (not having the three phase mains input detection device for phase sequence of zero line) of the three phase mains of the present invention
An embodiment structural representation；
Fig. 3 is the structural representation of another embodiment of the detection means of the three phase mains of the present invention；
Fig. 4 is the structural representation of the another embodiment of the detection means of the three phase mains of the present invention；
Fig. 5 is the structure of an embodiment of three phase mains access part and light-coupled isolation transmission circuit in device of the invention
Schematic diagram；
Fig. 6 is the schematic flow sheet of an embodiment of the using method of the detection means of the three phase mains of the present invention；
The flow process of the embodiment that Fig. 7 is judged for the two-phase power supply phase shortage outside voltage reference point in the method for the present invention is shown
It is intended to；
The flow process of the embodiment that Fig. 8 is judged for the phase power phase shortage in the method for the present invention as voltage reference point is shown
It is intended to.
With reference to accompanying drawing, in the embodiment of the present invention, reference is as follows：
1- three phase mains accesses part；10- needle stands；2- phase sequence acquiring units；20- current limliting modules；22- afterflow modules；24-
Light-coupled isolation transport module；26- pulls up module；The drop-down modules of 28-；3- controllers；30-DSP signal deteching circuits；4- communication sections
Part；5- guard blocks.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Corresponding accompanying drawing is clearly and completely described to technical solution of the present invention.Obviously, described embodiment is only the present invention one
Section Example, rather than the embodiment of whole.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
The every other embodiment obtained under the premise of going out creative work, belongs to the scope of protection of the invention.
A kind of embodiments in accordance with the present invention, there is provided detection means of three phase mains, the three-phase of the present invention as shown in Figure 2
The structural representation of one embodiment of the detection means of power supply.The detection means of the three phase mains can be can include：Phase sequence is obtained
Take unit 2 and controller 3.
In one example, the phase sequence acquiring unit 2, is adapted to setting with the three phase mains of no zero line, can be with
For with the phase power supply in the three phase mains as voltage reference point, obtaining the another two-phase power supply in the three phase mains by pre-
If the current phase sequence that phase angle in turn switches on.
Alternatively, the three phase mains of no zero line, can include：The L1 phases that the phase angle differs 120 ° successively are electric
Source, L2 phases power supply and L3 phase power supplys.Wherein, the phase power supply as the voltage reference point is the L1 phases power supply, described another
Two-phase power supply is the L2 phases power supply and the L3 phases power supply (can be found in the example shown in Fig. 5).
For example：In Figure 5, R, S, T are expressed as the three-phase (i.e. L1 phases, L2 phases, L3 phases) of three phase mains.Shown in Fig. 5
Circuit design mode design for voltage reference according to R phases, phase sequence is unique.
For example：On the basis of R phases, by R, S, T three-phase electricity 120 degree of electrical angles conducting determining conducting sequential.This
Sample, obtains the another biphase phase sequential mode in turn switching on based on one as voltage reference point, and so only needing to 2 optocouplers just can be with
, it is not necessary to other auxiliary circuits are (for example：Waveform-shaping module), circuit is simple, and reliability is high.
Thus, by with L1 phase power supplys as voltage reference point, examining to the connection phase sequence of L2 phases power supply and L3 phase power supplys
Survey, whether the wiring that can be more convenient, more accurately determine three phase mains is correct, and reliability is high, and safety is good.
Alternatively, example shown in Figure 5, the phase sequence acquiring unit 2, can include：Current limliting module 20, afterflow mould
Block 22 and light-coupled isolation transport module 24.
In an optional specific example, the quantity of the current limliting module 20 is three.Each current limliting module 20
First end, adaptation are arranged at the phase power supply in the three phase mains.
For example：Current limliting module 20, can include：Current-limiting resistance is (for example：Resistance R1, R2, R3 etc.).
For example：In Figure 5, R1, R2, R3 are current-limiting resistance, for limiting the LED current flow through in optocoupler.
In an optional specific example, the quantity of the afterflow module 22 is two.Each afterflow module 22
Negative electrode, is connected to the second end of the current limliting module 20 arranged with the phase power adaptation in the another two-phase power supply.Each
The anode of the afterflow module 22, is connected to the limit arranged with the phase power adaptation as the voltage reference point
Second end of flow module 20.
For example：Afterflow module 22, can include：Fly-wheel diode is (for example：Diode D1, D2 etc.).
For example：In Figure 5, the effect of diode D1, D2 is afterflow.
In an optional specific example, the quantity of the light-coupled isolation transport module 24 is two.Each described optocoupler
The anode of 24 input side of isolated transmission module, is connected with the negative electrode of the afterflow module 22 of adaptation.Each described light-coupled isolation
The negative electrode of 24 input side of transport module, is connected with the anode of the afterflow module 22 of adaptation.Each described light-coupled isolation transmission
The colelctor electrode of 24 outlet side of module, is connected with default DC source.Each 24 outlet side of light-coupled isolation transport module
Emitter stage, is connected with the controller 3.
For example：Light-coupled isolation transport module 24, can include：Photo-coupler U1, U2 etc..
For example：In Figure 5, optical coupling module is (for example：Optocoupler U1, optocoupler U2) isolation biography is carried out for the signal to getting
It is defeated.
Thus, arranged by the adaptation of current limliting module, afterflow module and light-coupled isolation transport module, acquisition does not have zero line
The current sequential of three phase mains, simple structure, acquisition modes are easy, obtain result accuracy good.
Alternatively, the phase sequence acquiring unit 2, can also include：At least one of pull-up module 26, drop-down module 28.
In an optional specific example, the pull-up module 26, adaptation are arranged at the light-coupled isolation transport module 24
Between the colelctor electrode of outlet side and the DC source.
For example：Pull-up module 26, can include：Pull-up resistor is (for example：Resistance R4, R5 etc.).
For example：In Figure 5, R4, R5 are pull-up resistor.
In an optional specific example, the drop-down module 28, adaptation are arranged at the light-coupled isolation transport module 24
Between the emitter stage of outlet side and the controller 3.
For example：Drop-down module 28, can include：Pull down resistor is (for example：Resistance R6, R7 etc.).
For example：In Figure 5, R6, R7 are pull down resistor.
Thus, arranged by the adaptation of pull-up module, drop-down module, light-coupled isolation transport module output signal can be lifted
Stability and reliability, and then ensure controller input signal accuracy so that the accuracy of controller judged result is more
It is good.
In one example, the controller 3, is adapted to setting with the phase sequence acquiring unit 2, is determined for described
Whether current phase sequence is consistent with setting phase sequence；And, when the current phase sequence is consistent with the setting phase sequence, determine described three
The wiring of phase power supply is correct；Or when the current phase sequence is inconsistent with the setting phase sequence, determine connecing for the three phase mains
Line mistake.
For example：The example shown in Fig. 5 is may refer to, when R, S, T three-phase power line wiring is correct, the three of the present invention intersects
The detection process that stream power supply does not have the circuit of testing the phase sequence of zero line can include：By taking 50HZ exchange input electricity as an example, with R as voltage
Datum mark, after 120 ° of R forward conductions, S forward conductions, so as to an optical coupling module (for example：Optocoupler U2) conducting, DSP signals
One lead-out terminal DSP1# output high level of detection circuit；Experienced after 120 ° again, T forward conductions, DSP signal detections electricity
Another lead-out terminal DSP2# output high level on road.
For example：In Figure 5, if three-phase alternating-current supply to be detected meets above-mentioned conducting sequential, DSP (i.e. DSP signal detections
Circuit) will judge that the signal being input into is normal, R, S, T three-phase power line wiring is correct.I.e., it has no can when there is anti-phase
Normally to detect, DSP1# pins and DSP2# pins are given to DSP master chips (for example：DSP signal deteching circuits) waveform sequential
It is consistent with the sequential of software program setting, it is judged as that wiring is correct.
For example：In Figure 5, if three-phase alternating-current supply to be detected does not meet above-mentioned conducting sequential, DSP (i.e. DSP signals inspections
Slowdown monitoring circuit) abnormal signal that is input into will be judged, R, S, T three-phase power line wiring is right.That is, also can when there is anti-phase
Normal to detect, the waveform sequential detected during anti-phase is (for example：Current phase sequence) with the sequential of software set (for example：Setting phase sequence)
It is not inconsistent, is judged as " wiring is wrong ".
It can be seen that, in Figure 5, i.e., when there is anti-phase, the waveform sequential that detects is different, and DSP is so as to judging R, S, T tri-
Phase power line wiring is wrong, and when there is not anti-phase, dsp chip just can detect data according to the program of software set on time.
Alternatively, the controller 3, can include：At least one of MCU, single-chip microcomputer, DSP signal deteching circuits 30.
Thus, by the controller of various ways, be conducive to being lifted to phase sequence acquiring unit acquisition result treatment mode
Motility and versatility so that user is using more convenient.
For example：The detection means of the three phase mains is (for example：Three-phase alternating-current supply as shown in Figure 5 does not have the phase sequence of zero line
The circuit of detection circuit) can detect whether three-phase power supply phase sequence is correct, if phase shortage in the case of no zero line, and then
Reach the purpose of three-phase power supply phase sequence detection.
Specifically, can be used for the three-phase power supply phase sequence detection for not having zero line.For example：Can be used for oil cooling machine does not have zero line
Three-phase phase-sequence detection.
Thus, arranged by the adaptation of phase sequence acquiring unit and controller, can be to the phase of the three phase mains for not having zero line
Sequence is detected, and detection mode is easy, and detection reliability is high.
In an optional embodiment, the controller 3 is can be also used for when the wiring error of the three phase mains
When, based on the current sequential, in determining the another two-phase power supply, whether there is arbitrary phase power supply access failure；And, when described another
When having arbitrary phase power supply access failure in two-phase power supply, arbitrary phase power phase shortage of access failure in the another two-phase power supply is determined.
For example：In Figure 5, when there are S phase shortages, optocoupler U2 cannot normally, DSP1# signals are always low electricity
Flat, dsp chip cannot detect high level on time according to the program of software set, will judge S-phase phase shortage.
For example：In Figure 5, when there are T phase shortages, optocoupler U1 cannot normally, DSP2# signals are always low electricity
Flat, dsp chip cannot detect high level on time according to the program of software set, will judge T-phase phase shortage.
Alternatively, the controller 3, can be also used for when no arbitrary phase power supply access failure in the another two-phase power supply
When, determine no arbitrary phase power phase shortage in the another two-phase power supply.In other words, the failure of the wiring error, is not as
What phase shortage caused, other detections can be carried out, the reason for further search for wiring error.
Thus, by the arbitrary phase to not having in the three phase mains of zero line in addition to the phase power supply as voltage reference point
The pile defection of power supply, the reason for can specify wiring error, and then is conducive to lifting the convenience and high efficiency of Breakdown Maintenance,
So that do not have the three phase mains of zero line use reliability and safety more preferably.
In an optional embodiment, the phase sequence acquiring unit 2 can be also used for obtaining in the another two-phase power supply
The connection duration of arbitrary phase power supply.
In an optional example, the controller 3 can be also used for determining in the another two-phase power supply that at least one is mutually electric
Whether the connection duration in source is more than preset duration；And, when connecing described in an at least phase power supply in the another two-phase power supply
When logical duration is more than the preset duration, the phase power phase shortage of the voltage reference point is determined as.
For example：In Figure 5, R is possible to phase shortage, and when R phase shortages, the ON time of optocoupler U1 and U2 is all than default conducting
Time length is (for example：High level time after optocoupler conducting rises to 1/2t by 1/3t, and t herein represents that one of optocoupler turns on
Cycle).Now, chip can not detect low level, T-phase phase shortage on time according to the program of software set.
Alternatively, the controller 3, can be also used for when the connection of arbitrary phase power supply in the another two-phase power supply
It is long no more than the preset duration when, be determined as the phase power supply of the voltage reference point not phase shortage.
Thus, by the pile defection of the phase power supply to not having in the three phase mains of zero line as voltage reference point, can
With the arbitrary phase being different from addition to voltage reference point, be conducive to lifting the reliability and accuracy of pile defection.
In an optional embodiment, the controller 3 is also adapted to setting with the three phase mains, can be used for working as
Arbitrary phase power phase shortage of access failure in the wiring error of the three phase mains, the another two-phase power supply, as the voltage base
During at least one of described phase power phase shortage on schedule, default failure alarm signal is exported (for example：Send, and/or show
Default failure alarm signal), and/or the three phase mains is protected by default protected mode.
For example：In Figure 5, when the wiring of R, S, T three-phase power line not pair when, controller mainboard is (for example：DSP signal detections
The mainboard of circuit) failure alarm signal is sent, point out wiring error, controller protection.For example：Three phase mains wiring is not to time control
When device processed is protected, controller output alarm signal points out oil cooling machine failure, controller not to output signal to ac contactor to lathe
Device, A.C. contactor disconnect.
For example：In Figure 5, during S-phase phase shortage, controller mainboard sends failure alarm signal, points out wiring error, controller
Protection.
For example：In Figure 5, during T-phase phase shortage, controller mainboard sends failure alarm signal, points out wiring error, controller
Protection.
For example：In Figure 5, during R phases phase shortage, chip can not detect low level on time according to the program of software set, and
Failure alarm signal is sent, wiring error, controller protection is pointed out.
Thus, processed by alternatively carrying out reminding when wiring error, phase shortage is detected, protect etc., on the one hand can be with
Make user learn wiring condition in time, on the other hand can ensure that Electrical Safety, hommization is able to significant increase.
In an optional embodiment, the controller 3, can be also used for by default protected mode to described three
After phase power supply is protected, whether arbitrary phase in the three phase mains whether wiring error, and/or the three phase mains is lacked
Continuation determination is carried out mutually, until when the wiring of the three phase mains is correct, exiting the protected mode.
Alternatively, the controller 3, can be also used for, when the wiring still mistake of the three phase mains, maintaining the guarantor
Shield pattern, to ensure Electrical Safety.
For example：In Figure 5, after the wiring of R, S, T three-phase power line is correct, controller exits protection, normal work.Namely
Say, when not detecting three phase mains wiring not pair, protected, until detect again three phase mains wiring it is correct when, just exit
Protection.For example：Just protected before testing, detect wiring it is correct when exit protection；Continue when detecting wiring error
Protection, until detect again wiring it is correct when just exit protection.
For example：In Figure 5, S-phase phase shortage enters protection, and after S-phase power line is connected, controller exits protection, normal work
Make.
For example：In Figure 5, T-phase phase shortage enters protection, and after T-phase power line is connected, controller exits protection, normal work
Make.
For example：In Figure 5, R phases phase shortage enters protection, and after R phase power lines are connected, controller exits protection, normal work
Make.
Thus, after protected mode being entered due to wiring error, exit protected mode after wiring is correct in time, make
Obtain electricity consumption normal, property easy to use is good, and Consumer's Experience is good.
In an optional embodiment, referring to the example shown in Fig. 3 and Fig. 4, can also include：Three phase mains access section
At least one of part 1, communication component 4, guard block 5.
In an optional example, the three phase mains accesses part 1, is adapted to setting with the phase sequence acquiring unit 2, can
For accessing the three-phase of the three phase mains, and it is connected to the phase sequence acquiring unit 2.
Alternatively, the three phase mains accesses part 1, can include：Needle stand 10.
In Figure 5, needle stand CN1 is the three-phase alternating current 380V power supplys of input.
Thus, electric power connector, simple structure, and safety are used as by needle stand good.
In an optional example, the communication component 4 is adapted to setting with the controller 3, can be used for when the control
When device processed 3 exports default failure alarm signal, set up between the controller 3 and default client and/or display screen
Communication connection, to realize the information exchange between the controller 3 and the client.
In an optional example, the guard block 5 is adapted to setting with the three phase mains and the controller 3, can
For when the controller 3 is protected to the three phase mains by default protected mode, in the control of the controller 3
The lower protection realized to the three phase mains of system.
Thus, part, communication component, guard block are accessed by three phase mains and is alternatively adapted to setting, it is right to cause
The detection of the three phase mains without zero line is convenient, more flexible, and hommization is more excellent.
The substantial amounts of verification experimental verifications of Jing, using the technical scheme of the present embodiment, by, in the case of no zero line, detecting three
Whether phase power phase is correct, if phase shortage, can reach the purpose of the three-phase power supply phase sequence detection for not having zero line, realize to not having
The three-phase power supply phase sequence for having zero line is detected that detection convenience is good, in case artificially causing wrong power line and then causing to burn out
Electrical equipment.
Embodiments in accordance with the present invention, additionally provide a kind of inspection of three phase mains of detection means corresponding to three phase mains
The using method of device is surveyed, as shown in Figure 6 the stream of an embodiment of the using method of the detection means of the three phase mains of the present invention
Journey schematic diagram.The using method of the detection means of the three phase mains can be can include：
At step S110, using the detection means of above-described three phase mains, with the three-phase electricity of no zero line
A phase power supply in source is voltage reference point, and the another two-phase power supply obtained in the three phase mains is in turn switched on by preset phase angle
Current phase sequence.
For example：In Figure 5, R, S, T are expressed as the three-phase (i.e. L1 phases, L2 phases, L3 phases) of three phase mains.Shown in Fig. 5
Circuit design mode design for voltage reference according to R phases, phase sequence is unique.
Thus, by with L1 phase power supplys as voltage reference point, examining to the connection phase sequence of L2 phases power supply and L3 phase power supplys
Survey, whether the wiring that can be more convenient, more accurately determine three phase mains is correct, and reliability is high, and safety is good.
At step S120, determine whether the current phase sequence is consistent with setting phase sequence.And,
At step S130, when the current phase sequence is consistent with the setting phase sequence, connecing for the three phase mains is determined
Line is correct.
Or at step S140, when the current phase sequence is inconsistent with the setting phase sequence, determine the three phase mains
Wiring error.
For example：The example shown in Fig. 5 is may refer to, when R, S, T three-phase power line wiring is correct, the three of the present invention intersects
The detection process that stream power supply does not have the circuit of testing the phase sequence of zero line can include：By taking 50HZ exchange input electricity as an example, with R as voltage
Datum mark, after 120 ° of R forward conductions, S forward conductions, so as to an optical coupling module (for example：Optocoupler U2) conducting, DSP signals
One lead-out terminal DSP1# output high level of detection circuit；Experienced after 120 ° again, T forward conductions, DSP signal detections electricity
Another lead-out terminal DSP2# output high level on road.
For example：In Figure 5, if three-phase alternating-current supply to be detected meets above-mentioned conducting sequential, DSP (i.e. DSP signal detections
Circuit) will judge that the signal being input into is normal, R, S, T three-phase power line wiring is correct.I.e., it has no can when there is anti-phase
Normally to detect, DSP1# pins and DSP2# pins are given to the waveform sequential of DSP master chips and the sequential one of software program setting
Cause, be judged as that wiring is correct.
For example：In Figure 5, if three-phase alternating-current supply to be detected does not meet above-mentioned conducting sequential, DSP (i.e. DSP signals inspections
Slowdown monitoring circuit) abnormal signal that is input into will be judged, R, S, T three-phase power line wiring is right.That is, also can when there is anti-phase
Normal to detect, the waveform sequential detected during anti-phase is not inconsistent with the sequential of software set, is judged as " wiring is wrong ".
It can be seen that, in Figure 5, i.e., when there is anti-phase, the waveform sequential that detects is different, and DSP is so as to judging R, S, T tri-
Phase power line wiring is wrong, and when there is not anti-phase, dsp chip just can detect data according to the program of software set on time.
For example：The detection means of the three phase mains is (for example：Three-phase alternating-current supply as shown in Figure 5 does not have the phase sequence of zero line
The circuit of detection circuit) can detect whether three-phase power supply phase sequence is correct, if phase shortage in the case of no zero line, and then
Reach the purpose of three-phase power supply phase sequence detection.
Specifically, can be used for the three-phase power supply phase sequence detection for not having zero line.For example：Can be used for oil cooling machine does not have zero line
Three-phase phase-sequence detection.
Thus, arranged by the adaptation of phase sequence acquiring unit and controller, can be to the phase of the three phase mains for not having zero line
Sequence is detected, and detection mode is easy, and detection reliability is high.
In an optional embodiment, can in the method for the present invention with reference to shown in Fig. 7 outside voltage reference point two
The schematic flow sheet of the embodiment that phase power phase shortage judges, further illustrates the two-phase power supply phase shortage outside voltage reference point and sentences
Disconnected detailed process.
Step S210, when the wiring error of the three phase mains, based on the current sequential, determines the another biphase electricity
Whether arbitrary phase power supply access failure is had in source.And,
Step S220, when having arbitrary phase power supply access failure in the another two-phase power supply, in determining the another two-phase power supply
Arbitrary phase power phase shortage of access failure.
For example：In Figure 5, when there are S phase shortages, optocoupler U2 cannot normally, DSP1# signals are always low electricity
Flat, dsp chip cannot detect high level on time according to the program of software set, will judge S-phase phase shortage.
For example：In Figure 5, when there are T phase shortages, optocoupler U1 cannot normally, DSP2# signals are always low electricity
Flat, dsp chip cannot detect high level on time according to the program of software set, will judge T-phase phase shortage.
It is alternatively possible to when no arbitrary phase power supply access failure in the another two-phase power supply, determine the another biphase electricity
No arbitrary phase power phase shortage in source.In other words, the failure of the wiring error, is not as what phase shortage caused, can carry out which
It detects, the reason for further search for wiring error.
Thus, by the pile defection of the arbitrary phase to not having in the three phase mains of zero line in addition to voltage reference point, can
The reason for clear and definite wiring error, and then be conducive to lifting the convenience and high efficiency of Breakdown Maintenance, so that no zero line
Three phase mains use reliability and safety more preferably.
In an optional embodiment, can be in the method for the present invention with reference to shown in Fig. 8 as the one of voltage reference point
The schematic flow sheet of the embodiment that phase power phase shortage judges, further illustrates the phase power phase shortage as voltage reference point and sentences
Disconnected detailed process.
Step S310, obtains the connection duration of arbitrary phase power supply in the another two-phase power supply.
Step S320, when whether determining the connection duration of an at least phase power supply in the another two-phase power supply more than presetting
It is long.And,
Step S330, when the connection duration of an at least phase power supply in the another two-phase power supply is more than the preset duration
When, it is determined as the phase power phase shortage of the voltage reference point.
For example：In Figure 5, R is possible to phase shortage, and when R phase shortages, the ON time of optocoupler U1 and U2 is all than default conducting
Time length is (for example：High level time after optocoupler conducting rises to 1/2t by 1/3t).Now, chip can not be according to software set
Program detect low level, T-phase phase shortage on time.
It is alternatively possible to the connection duration for working as arbitrary phase power supply in the another two-phase power supply is default no more than described
During duration, the phase power supply of the voltage reference point not phase shortage is determined as.
Thus, by the pile defection of the phase power supply to not having in the three phase mains of zero line as voltage reference point, can
With the arbitrary phase being different from addition to voltage reference point, be conducive to lifting the reliability and accuracy of pile defection.
In an optional embodiment, can also include：Wiring error, the another biphase electricity when the three phase mains
Arbitrary phase power phase shortage of access failure in source, as the voltage reference point an at least one of phase power phase shortage when,
Export default failure alarm signal, and/or the three phase mains is protected by default protected mode.
For example：In Figure 5, when the wiring of R, S, T three-phase power line not pair when, controller mainboard is (for example：DSP signal detections
The mainboard of circuit) failure alarm signal is sent, point out wiring error, controller protection.For example：Detect three-phase power supply phase sequence not
Pair when, controller control A.C. contactor disconnects, and cut-out is supplied to the power supply of controller.
For example：In Figure 5, during S-phase phase shortage, controller mainboard sends failure alarm signal, points out wiring error, controller
Protection.
For example：In Figure 5, during T-phase phase shortage, controller mainboard sends failure alarm signal, points out wiring error, controller
Protection.
For example：In Figure 5, during R phases phase shortage, chip can not detect low level on time according to the program of software set, and
Failure alarm signal is sent, wiring error, controller protection is pointed out.
Thus, processed by alternatively carrying out reminding when wiring error, phase shortage is detected, protect etc., on the one hand can be with
Make user learn wiring condition in time, on the other hand can ensure that Electrical Safety, hommization is able to significant increase.
In an optional embodiment, can also include：
After protecting to the three phase mains by default protected mode, to the three phase mains, whether wiring is wrong
In mistake, and/or the three phase mains, whether phase shortage carries out continuation determination to arbitrary phase, until the wiring of the three phase mains is correct
When, exit the protected mode.
It is alternatively possible to when the wiring still mistake of the three phase mains, the protected mode is maintained, to ensure that electricity consumption is pacified
Entirely.
For example：In Figure 5, after the wiring of R, S, T three-phase power line is correct, controller exits protection, normal work.Namely
Say, when not detecting three phase mains wiring not pair, protected, until detect again three phase mains wiring it is correct when, just exit
Protection.
For example：In Figure 5, S-phase phase shortage enters protection, and after S-phase power line is connected, controller exits protection, normal work
Make.
For example：In Figure 5, T-phase phase shortage enters protection, and after T-phase power line is connected, controller exits protection, normal work
Make.
For example：In Figure 5, R phases phase shortage enters protection, and after R phase power lines are connected, controller exits protection, normal work
Make.
Thus, after protected mode being entered due to wiring error, exit protected mode after wiring is correct in time, make
Obtain electricity consumption normal, property easy to use is good, and Consumer's Experience is good.
In an optional example application, can be by the detection means of above-described three phase mains, and/or above institute
The using method of the detection means of the three phase mains stated, is input into the detection of phase sequence for oil cooling machine three phase mains, to realize to oil
Cold does not have the three-phase phase-sequence detection of zero line, and then lifts the convenience and reliability of oil cooling machine three phase mains input Phase sequence detection
Property.
The process and function realized due to the method for the present embodiment essentially correspond to the device shown in aforementioned Fig. 2 to Fig. 5
Embodiment, principle and example, therefore not detailed part in the description of the present embodiment may refer to mutually speaking on somebody's behalf in previous embodiment
It is bright, will not be described here.
The substantial amounts of verification experimental verifications of Jing, using technical scheme, are examined by light-coupled isolation transmission circuit and DSP signals
The three phase mains input circuit of testing the phase sequence that slowdown monitoring circuit is constituted, has the three-phase power supply phase sequence detection circuit of zero line relative to tradition,
Main is exactly that, without zero line, next is exactly that circuit design is simple and practical, easy to detect, and reliability is high.
To sum up, skilled addressee readily understands that, on the premise of not conflicting, above-mentioned each advantageous manner can from
Combined by ground, be superimposed.
Embodiments of the invention are the foregoing is only, the present invention is not limited to, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within scope of the presently claimed invention.
Claims (14)
1. a kind of detection means of three phase mains, it is characterised in that include：Phase sequence acquiring unit (2) and controller (3)；Wherein,
The phase sequence acquiring unit (2), is adapted to setting with the three phase mains of no zero line, for in the three phase mains
A phase power supply be voltage reference point, obtain the another two-phase power supply in the three phase mains by working as that preset phase angle in turn switches on
Front phase sequence；
The controller (3), is adapted to setting with the phase sequence acquiring unit (2), for determine the current phase sequence whether with set
Determine phase sequence consistent；And,
When the current phase sequence is consistent with the setting phase sequence, determine that the wiring of the three phase mains is correct；Or work as when described
When front phase sequence is inconsistent with the setting phase sequence, the wiring error of the three phase mains is determined.
2. device according to claim 1, it is characterised in that the controller (3), is additionally operable to when the three phase mains
During wiring error, based on the current sequential, in determining the another two-phase power supply, whether there is arbitrary phase power supply access failure；And,
When having arbitrary phase power supply access failure in the another two-phase power supply, arbitrary phase of access failure in the another two-phase power supply is determined
Power phase shortage.
3. device according to claim 1 and 2, it is characterised in that the phase sequence acquiring unit (2), is additionally operable to obtain institute
State the connection duration of arbitrary phase power supply in another two-phase power supply；
The controller (3), is additionally operable to determine whether the connection duration of an at least phase power supply in the another two-phase power supply is big
In preset duration；And,
When the connection duration of an at least phase power supply in the another two-phase power supply is more than the preset duration, institute is determined as
State the phase power phase shortage of voltage reference point.
4. device according to claim 3, it is characterised in that the controller (3), is also adapted to the three phase mains and is set
Put, for when arbitrary phase power phase shortage of access failure in the wiring error of the three phase mains, the another two-phase power supply, as institute
When stating at least one of described phase power phase shortage of voltage reference point, default failure alarm signal is exported, and/or by default
Protected mode the three phase mains is protected.
5. device according to claim 4, it is characterised in that the controller (3), is additionally operable to by default protection mould
After formula is protected to the three phase mains, to appointing in the three phase mains whether wiring error, and/or the three phase mains
Whether phase shortage carries out continuation determination to one phase, until when the wiring of the three phase mains is correct, exiting the protected mode.
6. the device according to one of claim 1-5, it is characterised in that the phase sequence acquiring unit (2), including：Current limliting
Module (20), afterflow module (22) and light-coupled isolation transport module (24)；Wherein,
The quantity of the current limliting module (20) is three；The first end of each current limliting module (20), adaptation are arranged at described
A phase power supply in three phase mains；
The quantity of the afterflow module (22) is two；The negative electrode of each afterflow module (22), is connected to and described another two
Second end of the current limliting module (20) that the phase power adaptation in phase power supply is arranged；The sun of each afterflow module (22)
Pole, is connected to the second of the current limliting module (20) arranged with the phase power adaptation as the voltage reference point
End；
The quantity of the light-coupled isolation transport module (24) is two；Each light-coupled isolation transport module (24) input side
Anode, is connected with the negative electrode of the afterflow module (22) of adaptation；Each light-coupled isolation transport module (24) input side
Negative electrode, is connected with the anode of the afterflow module (22) of adaptation；Each light-coupled isolation transport module (24) outlet side
Colelctor electrode, is connected with default DC source；The emitter stage of each light-coupled isolation transport module (24) outlet side, it is and described
Controller (3) connects.
7. device according to claim 6, it is characterised in that the phase sequence acquiring unit (2), also includes：Pull-up module
(26), at least one of drop-down module (28)；Wherein,
Pull-up module (26), the colelctor electrode that adaptation is arranged at light-coupled isolation transport module (24) outlet side are straight with described
Between stream power supply；And/or,
The drop-down module (28), adaptation are arranged at the emitter stage of light-coupled isolation transport module (24) outlet side and the control
Between device (3) processed.
8. the device according to one of claim 1-7, it is characterised in that also include：Three phase mains accesses part (1), leads to
At least one of news part (4), guard block (5)；Wherein,
The three phase mains accesses part (1), is adapted to setting with the phase sequence acquiring unit (2), for accessing the three-phase electricity
The three-phase in source, and it is connected to the phase sequence acquiring unit (2)；And/or,
The communication component (4), is adapted to setting with the controller (3), for exporting default failure when the controller (3)
During alarm signal, set up the controller (3) and be connected with the communication between default client and/or display screen, to realize
State the information exchange between controller (3) and the client；And/or,
The guard block (5), is adapted to setting with the three phase mains and the controller (3), for when the controller (3)
When protecting to the three phase mains by default protected mode, realize under the control of the controller (3) to described three
The protection of phase power supply.
9. device according to claim 8, it is characterised in that wherein,
The three phase mains accesses part (1), including：Needle stand (10)；
And/or,
The controller (3), including：At least one of MCU, single-chip microcomputer, DSP signal deteching circuits (30)；
And/or,
The three phase mains without zero line, including：The phase angle differs 120 ° of L1 phase power supplys, L2 phases power supply and L3 successively
Phase power supply；Wherein, the phase power supply as the voltage reference point is the L1 phases power supply, and the another two-phase power supply is the L2
Phase power supply and the L3 phases power supply.
10. a kind of using method of the detection means of three phase mains, it is characterised in that include：
Using the detection means of the three phase mains as described in claim 1-9 is arbitrary, with the three phase mains of no zero line
A phase power supply be voltage reference point, obtain the another two-phase power supply in the three phase mains by working as that preset phase angle in turn switches on
Front phase sequence；
Determine whether the current phase sequence is consistent with setting phase sequence；And,
When the current phase sequence is consistent with the setting phase sequence, determine that the wiring of the three phase mains is correct；Or work as when described
When front phase sequence is inconsistent with the setting phase sequence, the wiring error of the three phase mains is determined.
11. methods according to claim 10, it is characterised in that also include：
When the wiring error of the three phase mains, based on the current sequential, whether have in determining the another two-phase power supply and appoint
One phase power supply access failure；And,
When having arbitrary phase power supply access failure in the another two-phase power supply, arbitrary phase of access failure in the another two-phase power supply is determined
Power phase shortage.
12. methods according to claim 10 or 11, it is characterised in that also include：
Obtain the connection duration of arbitrary phase power supply in the another two-phase power supply；
Determine the connection duration of an at least phase power supply in the another two-phase power supply whether more than preset duration；And,
When the connection duration of an at least phase power supply in the another two-phase power supply is more than the preset duration, institute is determined as
State the phase power phase shortage of voltage reference point.
13. methods according to claim 12, it is characterised in that also include：
Arbitrary phase power phase shortage of access failure in wiring error, the another two-phase power supply when the three phase mains, as described
During at least one of described phase power phase shortage of voltage reference point, default failure alarm signal is exported, and/or by default
Protected mode is protected to the three phase mains.
14. methods according to claim 13, it is characterised in that also include：
After protecting to the three phase mains by default protected mode, to the three phase mains whether wiring error,
And/or in the three phase mains arbitrary phase whether phase shortage carries out continuation determination, until the three phase mains wiring it is correct when, move back
Go out the protected mode.
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