CN205791478U - A kind of towed elevator phase order of 3-phase AC protector - Google Patents
A kind of towed elevator phase order of 3-phase AC protector Download PDFInfo
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- CN205791478U CN205791478U CN201620438265.4U CN201620438265U CN205791478U CN 205791478 U CN205791478 U CN 205791478U CN 201620438265 U CN201620438265 U CN 201620438265U CN 205791478 U CN205791478 U CN 205791478U
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- Prior art keywords
- phase
- transformator
- acquisition component
- amplitude
- power line
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Abstract
This utility model provides a kind of towed elevator phase order of 3-phase AC protector, wherein, described phase sequence relay includes three-phase transformer, amplitude information acquisition component and microprocessor, described three-phase transformer includes the first transformator, second transformator and the 3rd transformator, described amplitude information acquisition component includes possessing mutually isostructural first acquisition component, second acquisition component and the 3rd acquisition component, described acquisition component includes amplitude magnitude regulator and the amplitude direction descriminator being in parallel mutually, described amplitude information acquisition component is connected by external bus between described microprocessor, it is connected by holding wire between described acquisition component with described external bus.A kind of towed elevator phase order of 3-phase AC protector that this utility model embodiment provides, it is possible to accurately the phase sequence in towed elevator circuit is detected, it is possible in time circuit is protected when phase sequence changes.
Description
Technical field
This utility model relates to technical field of automatic control, particularly relates to a kind of towed elevator phase order of 3-phase AC and protects
Protect device.
Background technology
Three-phase circuit in normal power supply system represents electric power system 50Hz by red, green, yellow three kinds of colors respectively
Three alternating current line of force three-phases between relative rank.Exchange towed elevator system in, for ensure run safety prevent because of
The reversion of misphase motor causes the accident, and does not allow because the reason of wiring causes phase sequence between elevator three phase supply power line to change
Situation about becoming occurs, and specifying about code need to be by accessing phase sequence assembly with the situation preventing phase sequence from changing.Existing
Phase sequence relay often through arranging normally opened and normally closed contact, occur phase sequence change situation time, by change touch
Normally opened or the normally closed state of point, carrys out the safety of protection circuit.But phase sequence relay of the prior art it sometimes appear that
The situation of erroneous judgement, causes circuit can close suddenly or cannot protect circuit.
Utility model content
The purpose of this utility model embodiment is to provide a kind of towed elevator phase order of 3-phase AC protector, it is possible to
Accurately the phase sequence in towed elevator circuit is detected, it is possible in time circuit is protected when phase sequence changes.
For achieving the above object, this utility model embodiment provides a kind of towed elevator phase order of 3-phase AC protection
Device, described towed elevator powered by battery main switch by A phase power line, B phase power line and C phase power line, described phase sequence
Protector includes three-phase transformer, amplitude information acquisition component and microprocessor, and wherein, described three-phase transformer includes point
The first transformator, the second transformator and the 3rd that are not connected with described A phase power line, B phase power line and C phase power line become
Depressor, described amplitude information acquisition component include respectively with described first transformator, the second transformator and the 3rd transformator
Be connected possesses mutually isostructural first acquisition component, the second acquisition component and the 3rd acquisition component, described acquisition component
Including amplitude magnitude regulator and the amplitude direction descriminator being in parallel mutually, described amplitude information acquisition component is micro-with described
It is connected by external bus between processor, is connected by holding wire between described acquisition component with described external bus.
Further, being connected by fuse between each phase power line and corresponding transformator, each transformator is with corresponding
Acquisition component between by fuse be connected.
Further, the winding in each transformator in described three-phase transformer uses star-star connection method to connect, with really
The primary side protecting described three-phase transformer is identical with the voltage-phase of secondary side.
Further, it is also associated with adopting between each transformator and the amplitude magnitude regulator in corresponding acquisition component
Sample buffer.
Further, described sample buffer and described amplitude magnitude regulator all include the fortune that model is LM224J
Calculate amplifier.
From above-mentioned the application embodiment, this utility model is before towed elevator normally works, by described A
The voltage of phase power line, B phase power line and C phase power line supply is sampled, such that it is able to obtain described three-phase alternating current
Corresponding reference signal.Then described first acquisition component, the second acquisition component and the 3rd acquisition component can be passed through respectively
The voltage of described first transformator, the second transformator and the 3rd transformator output is carried out voltage amplitude size and voltage amplitude
The measurement in width direction, thus obtain voltage amplitude measurement result when towed elevator normally works.By by described voltage amplitude
Measurement result contrasts with described reference signal, may thereby determine that in the circuit of current towed elevator whether occur in that phase sequence
Situation about changing, once occurs, then can generate misphase signal and forbid that described towed elevator starts.As can be seen here, this reality
With a kind of towed elevator phase order of 3-phase AC protector of novel offer, it is possible to accurately to the phase sequence in towed elevator circuit
Detect, it is possible in time circuit is protected when phase sequence changes.
Accompanying drawing explanation
Fig. 1 is the structural representation of phase sequence relay in this utility model；
The schematic diagram in Fig. 2 this utility model, three-phase alternating current sampled.
Detailed description of the invention
For the technical scheme making those skilled in the art be more fully understood that in the application, real below in conjunction with the application
Execute the accompanying drawing in mode, the technical scheme in the application embodiment is clearly and completely described, it is clear that described
Embodiment is only a part of embodiment of the application rather than whole embodiments.Based on the embodiment party in the application
Formula, other embodiments all that those of ordinary skill in the art are obtained under not making creative work premise, all answer
When the scope belonging to the application protection.
The application embodiment provides a kind of towed elevator phase order of 3-phase AC protector, refers to Fig. 1, described traction
Elevator is powered by battery main switch 12 by A phase power line 13, B phase power line and C phase power line, described phase sequence relay bag
Including three-phase transformer 10, amplitude information acquisition component and microprocessor 7, wherein, described three-phase transformer 10 includes respectively
The first transformator, the second transformator and the 3rd transformation being connected with described A phase power line, B phase power line and C phase power line
Device, described amplitude information acquisition component include respectively with described first transformator, the second transformator and the 3rd transformator phase
Connect possesses mutually isostructural first acquisition component, the second acquisition component and the 3rd acquisition component, in described acquisition component
Including the amplitude magnitude regulator 3 being in parallel mutually and amplitude direction descriminator 5, described amplitude information acquisition component and described micro-place
It is connected by external bus 8 between reason device 7, is connected by holding wire 4,6 between described acquisition component with described external bus 8.
In the application one preferred implementation, by fuse 11 phase between each phase power line and corresponding transformator
Even, it is connected by fuse 9 between each transformator and corresponding acquisition component.
In the application one preferred implementation, the winding in each transformator in described three-phase transformer uses star
Connection connects, identical with the voltage-phase of secondary side 1 to guarantee the primary side 14 of described three-phase transformer.
In the application one preferred implementation, in each transformator and the amplitude size adjustment in corresponding acquisition component
Sample buffer 2 it is also associated with between device 3.
In the application one preferred implementation, described sample buffer 2 and described amplitude magnitude regulator 3 are all wrapped
Include the operational amplifier that model is LM224J.
Phase sequence relay of the present utility model goes for exchanging towed elevator TN-S electric power system, and line voltage is
380V.As it is shown in figure 1, this utility model use three-phase transformer 10 by the higher pressure blood pressure lowering of primary side 14 be secondary side 1 relatively
Low-voltage, primary side 14 and secondary side 1 all use fuse 9,11 to protect three-phase transformer and main circuit.In three-phase transformer
Each transformator in winding all use star-star connection method to connect, to guarantee the primary side 14 and two of described three-phase transformer
The voltage-phase of secondary side 1 is identical.The size of secondary side 1 voltage and the change that is in proportion of primary side 14 voltage, to secondary side 1
The detection of voltage phase sequence is equivalent to the detection to primary side 14 signal phase sequence.
In the present embodiment, three-phase voltage is after three-phase transformer 10 blood pressure lowering, and the output voltage of secondary side 1 can conduct
The measurement signal of phase sequence relay.Under normal circumstances, its three alternate phase sequence is certain to the three-phase alternating current of power supply, mutually electricity
Size within each cycle and phase relation can change pressure according to certain rule each other.Refer to Fig. 2, such as Fig. 2 institute
The three-phase voltage normalization waveform shown, at certain three continuous print sampling instant t1, t2, t3, deposits between three-phase voltage instantaneous value
Relation as shown in table 1.
The voltage that A phase power line, B phase power line and C phase power line are corresponding is represented below respectively with A, B, C.Such as table 1 institute
Show, the instantaneous value in the t1 moment: A (phase amplitude is minimum, and direction is negative), B (more than A and less than C, direction is negative to phase amplitude)；C
(phase amplitude maximum, direction are just)；At next sampling instant t2:A, (this magnitude of voltage is more than last t1 sampling instant A phase
Amplitude, this voltage is more than B less than the amplitude of C, and direction be negative), (this magnitude of voltage is less than last time t1 sampling instant B to B
The amplitude of phase and amplitude are less than A and C, and direction is negative)；(this magnitude of voltage is more than the amplitude of last t1 sampling instant C phase for C
Value, this voltage is more than B, amplitude more than C, and direction is just)；At ensuing sampling instant t3:A, (this magnitude of voltage is more than
The amplitude of last t2 sampling instant A phase, this voltage is more than the B amplitude less than C, and direction is just), (this magnitude of voltage is little for B
Amplitude and amplitude in last t2 sampling instant B phase are less than A and C, and direction is negative)；(this magnitude of voltage is less than the last time for C
The amplitude of t2 sampling instant C phase, this voltage is more than B, amplitude more than C, and direction is just).Owing to three-phase voltage is the cycle
Function, therefore these the intrinsic passes between three-phase all can be repeated in tying up to each cycle.
The state of three-phase voltage amplitude size and Orientation during table 1 continuous sampling
In the present embodiment, periodic law based on above-mentioned three-phase alternating voltage, normally can work at towed elevator
Before, according to the default sampling period, the voltage of described A phase power line, B phase power line and C phase power line supply is adopted
Sample, thus obtain the reference signal that described three-phase alternating current is corresponding.The three-phase electricity of predetermined number is included in described reference signal
Pressure information group, described three information of voltage groups include described A phase power line, B phase power line and C phase power line correspondence respectively
Voltage amplitude size and voltage amplitude direction.Wherein, the relative size that described voltage amplitude size can be as shown in table 1
Relation, described voltage amplitude direction can also be the positive-negative relationship shown in table 1.
After obtaining the reference signal that described three alternating currents are corresponding, this reference signal can be logged described microprocessor
In 7.The most just can normally start described towed elevator, detect with the phase sequence to the circuit of described towed elevator.Specifically
Ground, when described towed elevator normally works, it is possible to use described first acquisition component, the second acquisition component and the 3rd gather
Assembly respectively to described first transformator, the second transformator and the 3rd transformator output voltage carry out voltage amplitude size with
And the measurement in voltage amplitude direction, obtain voltage amplitude measurement result.Described voltage amplitude measurement result equally includes
The voltage amplitude size of described A phase power line, B phase power line and C phase power line correspondence respectively and voltage amplitude direction.This
Sample, by described voltage amplitude measurement result is contrasted with the three-phase voltage information group in described reference signal, thus can
To determine when described voltage amplitude measurement result is not mated with the arbitrary three-phase voltage information group in described reference signal, institute
The circuit stating towed elevator there occurs that phase sequence changes, such that it is able to generate misphase signal and forbid that described towed elevator starts.
In concrete application scenarios, when the output voltage signal of a certain phase power line is continued for not changing, then
Prove now to occur in that open phase fault, it should generate disconnected phase signals and forbid that described towed elevator starts.
In the actual application scenarios of the application one, exchange towed elevator electric power system is TN-S electric power system, line voltage
380V.Each transformator can select 380/10V, and rated capacity is the three-phase transformer of 10VA, each three-phase transformer around
Group uses star-star connection method to connect, and the voltage-phase of primary side with secondary side to guarantee described three-phase transformer is identical.Sampling
The operational amplifier that buffer and amplitude size actuator can select model to be LM224J.The type of amplitude direction descriminator
Number can be INA193.Described microcontroller can select MSP430f169 chip.MSP430f169 microcontroller
FLASH memory can be used to store described reference signal.
In this application scenarios, before phase sequence relay puts into protection operation, pretreatment operation can be carried out.Electrical network power frequency
For 50Hz, the cycle is 10 milliseconds.100 electrical voltage points are gathered at equal intervals, therefore in one voltage cycle of electrical network when pretreatment runs
Sampling period can be set as 100 microseconds, and sampled result is completed base during order is stored in FLASH memory in temporal sequence
The foundation of calibration signal.Put into after monitoring for protection, within one the working cycle 300 milliseconds of phase sequence relay, wait between the time
Every three-phase voltage is sampled three times.Between sampled result and the reference signal of any time three-phase voltage, village is permissible under normal circumstances
There is corresponding relation.Therefore, for the three groups of three-phase voltage information being sampled, if can not match with the reference signal stored
If, then this three-phase voltage information can be misphase information, and described microprocessor can generate misphase signal and transmit to elevator control
In the voltage relay of system processed, forbid that elevator starts.If the signal of a certain phase maintains and do not changes, then it is judged as there occurs
Open phase fault, sends corresponding disconnected phase signals, forbids that elevator starts.
From above-mentioned the application embodiment, this utility model is before towed elevator normally works, by described A
The voltage of phase power line, B phase power line and C phase power line supply is sampled, such that it is able to obtain described three-phase alternating current
Corresponding reference signal.Then described first acquisition component, the second acquisition component and the 3rd acquisition component can be passed through respectively
The voltage of described first transformator, the second transformator and the 3rd transformator output is carried out voltage amplitude size and voltage amplitude
The measurement in width direction, thus obtain voltage amplitude measurement result when towed elevator normally works.By by described voltage amplitude
Measurement result contrasts with described reference signal, may thereby determine that in the circuit of current towed elevator whether occur in that phase sequence
Situation about changing, once occurs, then can generate misphase signal and forbid that described towed elevator starts.As can be seen here, this reality
With a kind of towed elevator phase order of 3-phase AC protector of novel offer, it is possible to accurately to the phase in towed elevator circuit
Sequence detects, it is possible to protect circuit in time when phase sequence changes.
Above the describing of various embodiments of the application is supplied to those skilled in the art with the purpose described.It is not
It is intended to exhaustive or is not intended to be limited to this utility model single disclosed embodiment.As it has been described above, the application
Various replacements and change will be apparent from for above-mentioned technology one of ordinary skill in the art.Therefore, although had
Body discusses the embodiment of some alternatives, but other embodiment will be apparent from, or those skilled in the art
Relatively easily draw.The application is intended to be included in these of the present utility model all replacements discussed, amendment and change,
And other embodiment in the spirit and scope of above-mentioned application that falls.
Each embodiment in this specification all uses the mode gone forward one by one to describe, identical similar between each embodiment
Part see mutually, what each embodiment stressed is the difference with other embodiments.
Although depicting the application by embodiment, it will be appreciated by the skilled addressee that the application has many deformation
With change without deviating from spirit herein, it is desirable to appended claim includes that these deformation and change are without deviating from the application
Spirit.
Claims (5)
1. a towed elevator phase order of 3-phase AC protector, described towed elevator is by A phase power line, B phase power line and C
Phase power line is powered by battery main switch, it is characterised in that described phase sequence relay includes that three-phase transformer, amplitude information are adopted
Collection assembly and microprocessor, wherein, described three-phase transformer include respectively with described A phase power line, B phase power line and
The first transformator, the second transformator and the 3rd transformator that C phase power line is connected, described amplitude information acquisition component includes
Be connected with described first transformator, the second transformator and the 3rd transformator respectively possesses mutually isostructural first collection group
Part, the second acquisition component and the 3rd acquisition component, described acquisition component include the amplitude magnitude regulator that is in parallel mutually and
Amplitude direction descriminator, described amplitude information acquisition component is connected by external bus between described microprocessor, described in adopt
Collection assembly is connected by holding wire between described external bus.
Phase sequence relay the most according to claim 1, it is characterised in that logical between each phase power line and corresponding transformator
Overcurrent fuse is connected, and is connected by fuse between each transformator and corresponding acquisition component.
Phase sequence relay the most according to claim 1, it is characterised in that in each transformator in described three-phase transformer
Winding use star-star connection method connect, the voltage-phase of primary side with secondary side to guarantee described three-phase transformer is identical.
Phase sequence relay the most according to claim 1, it is characterised in that each transformator with in corresponding acquisition component
Amplitude magnitude regulator between be also associated with sample buffer.
Phase sequence relay the most according to claim 4, it is characterised in that described sample buffer and described amplitude size
Actuator all includes the operational amplifier that model is LM224J.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620438265.4U CN205791478U (en) | 2016-05-13 | 2016-05-13 | A kind of towed elevator phase order of 3-phase AC protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620438265.4U CN205791478U (en) | 2016-05-13 | 2016-05-13 | A kind of towed elevator phase order of 3-phase AC protector |
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| Publication Number | Publication Date |
|---|---|
| CN205791478U true CN205791478U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620438265.4U Expired - Fee Related CN205791478U (en) | 2016-05-13 | 2016-05-13 | A kind of towed elevator phase order of 3-phase AC protector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026030A (en) * | 2016-05-13 | 2016-10-12 | 南京铁道职业技术学院 | Traction elevator three-phase AC phase sequence protector and protection method |
-
2016
- 2016-05-13 CN CN201620438265.4U patent/CN205791478U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106026030A (en) * | 2016-05-13 | 2016-10-12 | 南京铁道职业技术学院 | Traction elevator three-phase AC phase sequence protector and protection method |
| CN106026030B (en) * | 2016-05-13 | 2018-12-04 | 南京铁道职业技术学院 | A kind of towed elevator phase order of 3-phase AC protector and guard method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20170513 |
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| CF01 | Termination of patent right due to non-payment of annual fee |