CN108750855A - A kind of disconnected phase misphase detection method and device of elevator three phase mains - Google Patents
A kind of disconnected phase misphase detection method and device of elevator three phase mains Download PDFInfo
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- CN108750855A CN108750855A CN201810992227.7A CN201810992227A CN108750855A CN 108750855 A CN108750855 A CN 108750855A CN 201810992227 A CN201810992227 A CN 201810992227A CN 108750855 A CN108750855 A CN 108750855A
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- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 238000000819 phase cycle Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000007493 shaping process Methods 0.000 claims description 30
- 230000006837 decompression Effects 0.000 claims description 23
- 238000006243 chemical reaction Methods 0.000 claims 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 10
- 238000001914 filtration Methods 0.000 description 7
- 239000003381 stabilizer Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000000087 stabilizing effect Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/0006—Monitoring devices or performance analysers
- B66B5/0018—Devices monitoring the operating condition of the elevator system
- B66B5/0031—Devices monitoring the operating condition of the elevator system for safety reasons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
-
- 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)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Elevator Control (AREA)
- Rectifiers (AREA)
Abstract
The present invention relates to elevators to detect control technology field, more particularly to a kind of disconnected phase misphase detection method and device of elevator three phase mains, this method includes that the first phase voltage and the second phase voltage are carried out after overvoltage is converted to the comparison of phase sequence respectively, and using comparison result as the startup voltage for switching stop unit；If startup voltage is low level, the relay switch module for switching stop unit disconnects, and stop relay electric-loss then controls elevator brake system stop elevator；If startup voltage is high level, the relay switch module conducting of stop unit is switched, stop relay obtains electric, elevator brake system normal work.The present invention can solve to control elevator brake system stop elevator rapidly after detecting three phase mains misphase or disconnected phase.
Description
Technical field
The present invention relates to elevators to detect control technology field, and in particular to a kind of disconnected phase misphase detection side of elevator three phase mains
Method and device.
Background technology
There is the phenomenon that any phase disconnects to be phase of breaking in three-phase electricity, the sequence wrong of three-phase electricity is exactly misphase.Either
Still disconnected mutually its harm is prodigious to misphase, for example, some electromechanical equipments lead to accident because of being reversed after power phase is reversed
Or equipment damage, disconnected phase will also result in the damage of electromechanical equipment.
In elevator brake system, three phase mains play the role of it is vital, if three phase mains occur it is disconnected mutually and
The case where misphase, at this time elevator be in breakneck situation, it is therefore desirable to detect the correctness of three-phase power supply phase sequence.
It can not be after there is unusual condition rapidly using circuit of testing the phase sequence general at present in elevator brake system
Stop elevator.
Invention content
The object of the present invention is to provide a kind of disconnected phase misphase detection method and device of elevator three phase mains, for solving
Control elevator brake system stop elevator rapidly after detecting three phase mains misphase or disconnected phase.
In order to reach above-mentioned technical purpose, the technical solution adopted in the present invention is as follows：
A kind of disconnected phase misphase detection method of elevator three phase mains, which is characterized in that including：
By the first phase voltage and the second phase voltage respectively after overvoltage is converted carry out phase sequence comparison, and using comparison result as
Switch the startup voltage of stop unit；
If startup voltage is low level, the relay switch module for switching stop unit disconnects, and stop relay electric-loss is then controlled
Elevator brake system stop elevator processed；
If startup voltage is high level, the relay switch module conducting of stop unit is switched, stop relay obtains electric, elevator
Braking system works normally.
Further, the detection method further includes：
Third phase voltage and the first phase voltage are obtained into the second supply voltage as switch stop list after step-down rectifier respectively
The supply voltage of member.
Further, the switch stop unit further includes：
The load handover module coupled with the relay switch module；
When the relay switch module is connected, the load handover module is not turned on, and stop relay is accessed as load
Switch stop unit；
When the relay switch module disconnects, load handover module conducting, and by pair of the load handover module
Ground resistance access switch stop unit.
Further, the comparison that the first phase voltage and the second phase voltage are carried out after overvoltage is converted to phase sequence respectively,
Include the following steps：
By the first phase voltage by being depressured and the first comparison voltage, first comparison voltage being used as to again pass by after halfwave rectifier
The first supply voltage is used as after halfwave rectifier；
By the second phase voltage by being depressured and the second comparison voltage, second comparison voltage being used as to again pass by after halfwave rectifier
It is connected with first supply voltage after halfwave rectifier；
First supply voltage provides operating voltage for waveform shaping circuit and sequential comparing unit；
Respectively by waveform shaping circuit, corresponding be made into is appropriate for sequential for first comparison voltage and the second comparison voltage
The first voltage square wave and second voltage square wave compared；
The first voltage square wave and second voltage square wave carry out the comparison of sequential by sequential comparing unit.
Further, first supply voltage, including：
For when first supply voltage is less than a certain setting value, the compensation of voltage to be carried out for first supply voltage
Voltage compensating circuit.
A kind of disconnected phase misphase detection device of elevator three phase mains, including：
First phase voltage is obtained to the first voltage converting unit of the first comparison voltage after overvoltage is converted；
Second phase voltage is obtained to the second voltage converting unit of the second comparison voltage after overvoltage is converted；
Waveform shaping unit, for first comparison voltage and the second comparison voltage to be shaped as the first square wave accordingly respectively
Signal and the second square-wave signal；
The first voltage square wave and second voltage square wave are subjected to the phase sequence comparing unit that phase sequence relatively obtains starting voltage；With
Judge start voltage whether can starting relay switch module, if cannot start, relay disconnects stop elevator
Switch stop unit.
Further, the detection device further includes：
By third phase voltage and the first phase voltage respectively by decompression, and the signal after decompression is obtained the after full-wave rectification
The tertiary voltage converting unit of two supply voltages.
Further, the first voltage converting unit, including：
The first voltage reduction module for being depressured the first phase voltage of input by voltage reduction module；
The first phase voltage after the decompression is carried out to the first half-wave rectification block of halfwave rectifier.
Further, the second voltage converting unit, including：
The second voltage reduction module for being depressured the second phase voltage of input by voltage reduction module；
The second phase voltage after the decompression is carried out to the second half-wave rectification block of halfwave rectifier.
Further, the switch stop unit further includes：
With the concatenated relay switch module of elevator relay coil；With
It is coupled with the relay switch module, for the on off state according to the relay switch module, to the switch
The load of stop unit is the load switching mould of stop relay or the load handover module switched over to ground resistance
Block；
The present invention has the advantages that：
The present invention by the way that the two-phase electricity in three phase mains to be carried out to the corresponding transformed voltage that is converted to of voltage respectively, and
The transformed two-phase voltage carry out after waveform shaping the comparison of phase sequence, if the waveform of this two-phase voltage occur it is disconnected mutually or
The phenomenon that person's misphase, then the startup voltage exported can not starting relay switch module, stop relay is by dead electricity stop at this time
Elevator；If the synchronous waveform of this two-phase voltage, do not occur it is disconnected mutually or the case where misphase occurs, then the startup voltage energy exported
Enough turn-on relay switch modules, stop relay power is normal at this time, elevator normal operation.Therefore, the present invention can solve
Control elevator brake system stop elevator rapidly after detecting three phase mains misphase or disconnected phase.
Description of the drawings
Fig. 1 is a kind of disconnected phase detecting circuit block diagram flow chart that is staggered of three phase mains provided in an embodiment of the present invention；
Fig. 2 is the flow chart of the voltage processing in Fig. 1 provided in an embodiment of the present invention；
Fig. 3 is a kind of disconnected phase detecting circuit block diagram that is staggered of three phase mains provided in an embodiment of the present invention；
Fig. 4 is the circuit diagram of a part provided in an embodiment of the present invention；
Fig. 5 is the circuit diagram of another part provided in an embodiment of the present invention；
Fig. 6 is the circuit diagram of another part provided in an embodiment of the present invention.
Specific implementation mode
Below by specific embodiment combination attached drawing, the present invention will be described in detail, it should be noted that in the feelings not conflicted
Under condition, the feature in embodiment and embodiment in the present invention can be combined with each other, and protection scope of the present invention is not limited to this.
First it should be noted that：" first ", " second " in the present embodiment be in order to preferably describe this programme,
It is not offered as sequencing or significance level.
It should be noted that in each embodiment of the present invention, involved term is：
Voltage reduction module is mainly used for for high pressure being reduced to the low pressure of needs.There are many kinds of type, examples for the decompression means that can be selected
As common resistance decompression, inductance decompression, transistor buck, transformer pressure-reducing or others can be realized alternating current
High pressure is reduced to the modes such as the reduction voltage circuit of low pressure, such as resistance-capacitance depressurization.
Half-wave rectification block is mainly used for carrying out rectification using the characteristic of the one-way conduction of diode, and reservation can be led
The voltage of logical diode.In the case where input signal is sine wave, export the positive half of sine wave, negative half then by except
It goes.The mode of common halfwave rectifier is to use diode, or formed with other components by core of diode
The circuit for being mainly used for halfwave rectifier.
Full-wave rectification block is mainly used for for AC signal being converted into the electric current of single direction.Common full-wave rectification is
The rectifier bridge being made of four diodes can also use others that can realize the circuit of full-wave rectification.
Referring to FIG. 1, it illustrates a kind of disconnected phase misphase detections of elevator three phase mains provided by one embodiment of the present invention
Method, including：
Step 101：First phase voltage and the second phase voltage are carried out after overvoltage is converted to the comparison of phase sequence respectively, and will be compared
As a result the startup voltage as switch stop unit.
Firstly the need of in three phase mains first phase voltage and the second phase voltage be depressured successively, halfwave rectifier
It is square wave with waveform shaping, to be suitable as the voltage that phase sequence compares.Then the square wave is subjected to phase by corresponding d type flip flop
The comparison of sequence, using signal all the way therein as the clock signal of d type flip flop, another way signal is believed as the input of d type flip flop
Number, if the phase sequence of two paths of signals is identical, the signal exported is high level；If the phase sequence of two paths of signals has differences,
The signal of output is low level.Finally switch stop unit is given using the output signal as voltage output is started.
Step 102：If startup voltage is low level, the relay switch module for switching stop unit disconnects, then stop
Relay electric-loss controls elevator brake system stop elevator.
The coil of the stop relay is connected in relay switch module, and the relay switch module is used with three
Pole pipe is the circuit of switch element, described to start the base voltage that voltage is triode, the coil of the collector and relay
It is connected.If starting voltage is unable to turn-on relay switch module, the coil losing electricity of stop relay, then elevator brake system
In the normal open switch of relay disconnected with coil losing electricity, and then control elevator brake system stop elevator.
Step 103：If startup voltage be high level, switch stop unit relay switch module conducting, stop after
Electric appliance obtains electric, elevator brake system normal work.
If the startup voltage turn-on relay switch module, the coil of stop relay obtain it is electric, then elevator device
In the normal open switch of relay be attracted, then elevator device normal operation.
In conclusion the wherein two-phase in three-phase electricity can be carried out the comparison of phase sequence by the present invention, and by the comparison of phase sequence
As a result output is carried out in a manner of level height as the startup voltage of switch stop unit repeat circuit switch module, if starting
Voltage can starting relay switch module, then illustrate that the phase sequence of this two-phase is identical, be not present misphase or disconnected phase the case where, this
When stop relay obtain it is electric, elevator brake system normal work；If starting voltage is unable to starting relay switch module, illustrate
The phase sequence of this two-phase is different, the case where misphase or disconnected phase occurs, at this time stop relay electric-loss, and relay controls elevator system
Dynamic system stop elevator.Therefore, the present invention can solve to control electricity rapidly after detecting three phase mains misphase or disconnected phase
Terraced braking system stop elevator, to avoid safety accident.
Preferably, the detection method further includes：
Third phase voltage and the first phase voltage are obtained into the second supply voltage as switch stop list after step-down rectifier respectively
The supply voltage of member.
Firstly the need of in three phase mains third phase voltage and the first phase voltage be depressured respectively, then will decompression after
Signal carry out full-wave rectification as the two-way input signal of full-wave rectification after obtain the second supply voltage, the second power supply electricity
Press the supply voltage as stop unit.There are many means of decompression, and the mode of resistance decompression is selected to carry out in the present embodiment
Decompression.Full-wave rectification is by the way of electric bridge.
Preferably, in order to stablize the supply voltage of final output, the supply voltage of output can be carried out by voltage-stabiliser tube
Voltage stabilizing.
The present invention can be carried by the way that third phase voltage and the first phase voltage are converted to the second supply voltage for stop unit
Voltage supplied can realize self-supporting voltage, do not need the external world and power supply is provided separately.
Preferably, the switch stop unit further includes：
The load handover module coupled with the relay switch module；
When the relay switch module is connected, the load handover module is not turned on, and stop relay is accessed as load
Switch stop unit；
When the relay switch module disconnects, load handover module conducting, and by pair of the load handover module
Ground resistance access switch stop unit.
Preferably, referring to FIG. 2, described carry out phase after overvoltage is converted respectively by the first phase voltage and the second phase voltage
The comparison of sequence, includes the following steps：
Step 201：By the first phase voltage by being depressured and being used as the first comparison voltage, first comparison voltage after halfwave rectifier
It is used as the first supply voltage after again passing by halfwave rectifier.
By the first phase voltage successively by decompression and halfwave rectifier, the mode of decompression can select the mode that resistance is depressured,
Halfwave rectifier may be used diode and carry out halfwave rectifier.Through decompression and halfwave rectifier after obtained the first comparison voltage can
Can there can be fluctuation, can select to carry out voltage stabilizing and/or filtering to the first comparison voltage at this time, for example, by the first comparison voltage
Voltage-stabiliser tube, capacitance and/or the resistance of connection one over the ground.
Step 202：By the second phase voltage by being depressured and being used as the second comparison voltage after halfwave rectifier, described second compares
Voltage is connected after again passing by halfwave rectifier with first supply voltage.
Likewise, for better burning voltage, the fluctuation of voltage signal is eliminated, can also be selected to the second comparison voltage
Voltage stabilizing and/or filtering are carried out, for example, the second comparison voltage is connected voltage-stabiliser tube, capacitance and/or a resistance over the ground.
Step 203：First supply voltage provides operating voltage for waveform shaping circuit and sequential comparing unit.
It is converted to the first supply voltage by the first phase voltage and the second phase voltage, is using first supply voltage
Waveform shaping circuit and the power supply of sequential comparing unit, can realize self-supporting voltage, operating voltage be provided separately without external, fully
The advantage that circuit itself is utilized.In order to prevent certain in two paths of signals all the way signal there is a situation where misphase or disconnected phase,
First phase voltage and the second phase voltage are switched to the first supply voltage by the present invention, the effect that can be mutually compensated for.
Step 204：First comparison voltage and the second comparison voltage are corresponding to be made into respectively by waveform shaping circuit
It is appropriate for the first voltage square wave and second voltage square wave that sequential compares.
The waveform shaping circuit is played the role of being that the data-signal through over commutation is shaped as square-wave signal at this.
Can include zero-crossing comparator, digital comparator or Schmidt trigger by the mode that the waveform shaping after rectification is square wave
Deng.
Step 205：The first voltage square wave and second voltage square wave carry out the comparison of sequential by sequential comparing unit.
The sequential comparing unit can select d type flip flop to carry out the ratio of sequential for comparing whether two waveforms coincide
Compared with.Using the first voltage square wave as the clock signal input d type flip flop of d type flip flop, using the second voltage square wave as D
Input signal is compared by the input signal of trigger with clock signal, if in the rising edge of clock signal, input signal
For high level, illustrate that clock signal is synchronous with input signal, then the startup voltage exported is high level；If in the upper of clock signal
Edge is risen, input signal is low level, illustrates that clock signal and input signal are asynchronous, then the startup voltage exported is low level.
In the present embodiment the first phase voltage and the second phase voltage obtained after a series of processing the first supply voltage,
Corresponding first comparison voltage and the second comparison voltage；It is that waveform shaping circuit and sequential compare using first supply voltage
Unit provides operating voltage, can realize the self-supporting voltage of circuit, power supply is provided separately without the external world；Utilize the first comparison voltage
It is square wave to carry out waveform shaping respectively with the second comparison voltage, then relatively obtains square wave progress sequential to start voltage accordingly,
And then using the braking function for starting voltage cut-out stop module, if starting voltage is unable to starting switch stop unit,
Control elevator brake system stop elevator.Therefore, the present invention can solve after detecting three phase mains misphase or disconnected phase
Rapid control elevator brake system stop elevator, to avoid safety accident.
Preferably, first supply voltage, including：
For when first supply voltage is less than a certain setting value, the compensation of voltage to be carried out for first supply voltage
Voltage compensating circuit.
There is the fluctuation of signal in the first supply voltage that the first phase voltage and the second phase voltage are provided in order to prevent, by institute
The first supply voltage is stated with voltage compensating circuit to be connected.Preferably, the power supply supply of the compensation circuit comes from described the
The second supply voltage that one phase voltage provides, naturally it is also possible to use external supplies voltages.
It please refers to Fig.3, Fig. 4 and Fig. 5, a kind of elevator three phase mains provided it illustrates one embodiment of the invention is disconnected
Phase misphase detection device, the device include：First voltage converting unit 300, second voltage converting unit 400, waveform shaping list
Member 500, phase sequence comparing unit 600 and switch stop unit 700.
First voltage converting unit 300 turns for the first phase voltage A1 to be carried out voltage by first voltage converting unit
The first comparison voltage VC1 is obtained after changing.
Preferably, the first voltage converting unit includes the first voltage reduction module and the first half-wave rectification block.
First voltage reduction module, is depressured using resistance R2.First phase voltage A1 after resistance R2 is depressured,
And the signal after decompression is passed into the first half-wave rectification block and is handled.
First half-wave rectification block carries out halfwave rectifier using the diode D5 of forward conduction, obtains first and compare
Voltage VC1.
Second voltage converting unit 400, for turning the second phase voltage B1 through overvoltage by second voltage converting unit
The second comparison voltage VC2 is obtained after changing.
Preferably, the second voltage converting unit includes the second voltage reduction module and the second half-wave rectification block.
Second voltage reduction module, is depressured using resistance R3.Second phase voltage B1 after resistance R3 is depressured,
Signal after decompression is passed into the processing of the second half-wave rectification block.
Second half-wave rectification block carries out halfwave rectifier using the diode D7 of forward conduction, obtains second and compare
Voltage VC2.
Waveform shaping unit 500, for respectively that the first comparison voltage VC1 and the second comparison voltage VC2 is corresponding
It is shaped as the first square-wave signal and the second square-wave signal.
Preferably, in the present embodiment, the acp chip of the waveform shaping unit selects anti-phase output Schmidt's contactor
The VCC pin of U1, the anti-phase output Schmidt contactor U1 connect supply voltage, GND pin ground connection, and input pin 6A is received
The first comparison voltage VC1 signals, anti-phase output Schmidt's contactor U1 is by the first comparison voltage VC1 signal shapings of input
For square-wave signal, exported by output pin 6Y corresponding with the input pin 6A.Since anti-phase output Schmidt contacts
Device U1 is anti-phase output, therefore the RC low-pass filtering that the square-wave signal is constituted after pin 6Y output by resistance R12 and capacitance 6
Device is filtered, and filtered square-wave signal carries out waveform by input pin 5A input inversions output Schmidt's contactor U1 again
Shaping, obtained after second of shaping the first square-wave signal by output pin 5Y corresponding with the input pin 5A export to
Phase sequence comparing unit.
Similarly, the second comparison voltage VC2 exports Schmidt's contactor U1 by input pin 1A input inversions and carries out
The shaping for the first time of waveform obtains square-wave signal, which exports by output pin 1Y corresponding with the pin 1A, should
Square-wave signal is anti-again by input pin 2A inputs after resistance R7 and capacitance the C4 low-pass filter constituted are filtered
Mutually output Schmidt's contactor U1 carries out the shaping again of waveform and obtains the second square-wave signal, second square-wave signal by with it is defeated
Enter the corresponding output pin 2Y of pin 2A and export to give phase sequence comparing unit.
Preferably, the first comparison voltage VC1 after the first filtering voltage regulation module by being used as the one of waveform shaping unit
A input signal.The first filtering voltage regulation module includes the voltage-stabiliser tube ZD3, capacitance C2 and resistance R5 being grounded respectively.
Preferably, the second comparison voltage VC2 after the second filtering voltage regulation module by being used as the another of waveform shaping unit
One input signal.The second filtering voltage regulation module includes the voltage-stabiliser tube ZD4, capacitance C3 and resistance R6 being grounded respectively.
Phase sequence comparing unit 600 is relatively obtained for the first voltage square wave and second voltage square wave to be carried out phase sequence
Start voltage.
Preferably, the phase sequence comparing unit uses d type flip flop U2, receives first square-wave signal and the second square wave letter
Number, using first square-wave signal as the CLK pin of the clock signal input d type flip flop U2 of d type flip flop U2, by described second
D1 pin of the square-wave signal as the input signal input d type flip flop U2 of d type flip flop U2, is carried out using the characteristic of d type flip flop U2
The comparison of phase sequence.
D type flip flop U2 is overturn in the forward position of clock pulses, and the next state of d type flip flop U2 depends on the pulse of clock signal
The state of the input signal of D1 pins before rising edge arrives；If at the time of clock signal is overturn, the D1 of d type flip flop U2
The input signal of pin is high level, then the output signal of the output pin Q1 of d type flip flop U2 is high level；If working as clock signal
At the time of reversion, the input signals of the D1 pins of d type flip flop U2 is low level, then the output pin Q1 of d type flip flop U2
Output signal is low level.
Phase sequence comparing unit is sent to switch stop unit using the signal that output pin Q1 is exported as voltage is started.
Preferably, in order to adapt startup voltage to switch stop unit, by d type flip flop U2 outputs
Start voltage and again passes by the shaping that waveform shaping unit carries out waveform.As shown in figure 5, start voltage by by resistance R13 and
The low-pass filter that capacitance C7 is constituted enters the input pin 4A of anti-phase output Schmidt's contactor U1 after being filtered, into excessively anti-
It is mutually exported from corresponding output pin 4Y after the shaping for the first time of output Schmidt's contactor U1 progress waveform, and is again introduced into input
Pin 3A carries out the shaping again of waveform, eventually passes through the startup voltage of waveform shaping twice from anti-phase output Schmidt's contactor
The output pin 3Y of U1, which is exported, gives switch stop unit.
Switch stop unit 700, for judge startup voltage whether can starting relay switch module, if cannot start,
Then relay disconnects stop elevator.
Preferably, the switch stop unit further includes relay switch module and load handover module.
The relay switch module is coupled with the load handover module, and is connected with elevator relay coil.This reality
Example is applied using NPN type triode as switch transistor T R1, the base stage of the switch transistor T R1 passes through base resistance R10 and the startup
Voltage is connected, and is connected by feedback resistance R11 between the base stage and emitter-base bandgap grading of the switch transistor T R1, the emitter grounding is described to open
The collector of pass pipe TR1 passes sequentially through resistance R9 and relay K1 and is connected with the second supply voltage VP2.
Preferably, in order to the break-make of more visual indication relay, positive guide is increased at the both ends of resistance R9
Logical light emitting diode OK is used to indicate the break-make situation of relay.
Preferably, for protective relay, a sustained diode 11 in parallel on relay.
The load handover module is coupled with the relay switch module, for according to the relay switch module
On off state, to it is described switch stop unit load be stop relay or it is described load handover module to ground resistance
The load handover module switched over.The present embodiment is using NPN type triode as switching switch transistor T R2, the switching switch
Pipe TR2 is coupled with the switch transistor T R1, and the collector of the switching switch transistor T R2 is connected with the second supply voltage VP2,
The base stage of switching switch transistor T R2 is connected with the collector of the switch transistor T R1, and emitter-base bandgap grading is connect by resistance R14 and resistance R15 respectively
Ground.
When the switch transistor T R1 is connected, the load of relay K1 conductings, second supply voltage is relay K1.
When the switch transistor T R1 is disconnected, relay K1 is not turned on, but there are faint electric current, energy in the coil of relay at this time
Enough be connected change-over switch pipe TR2, the load of second supply voltage at this time is resistance R14 and R15.
Preferably, bridging has divider resistance R8 between the second supply voltage VP2 and change-over switch TR1.In order to
More intuitively observe the electric power thus supplied of the second supply voltage VP2, the light-emitting diodes of a forward conduction in parallel with resistance R8
Pipe POWER.
Preferably, referring to Fig. 4, which further includes：
Tertiary voltage converting unit is depressured for passing through third phase voltage C1 and the first phase voltage A1 respectively, and will be after decompression
Signal the first supply voltage VP1 is obtained after full-wave rectification.The first supply voltage VP1 is as switch stop unit
Supply voltage.
The tertiary voltage converting unit includes third voltage reduction module, full-wave rectification block and the 4th voltage reduction module.
Preferably, the third phase voltage C1 is depressured by third voltage reduction module first, and the present embodiment uses resistance
The mode of decompression is depressured, and third phase voltage C1 is after resistance R4 is depressured as an input of full-wave rectification block
Signal.
After the first phase voltage A1 is depressured by resistance R1 in parallel and capacitance C1 the 4th voltage reduction module constituted
Another input signal as full-wave rectification block.
Full-wave rectification block is the bridge rectifier of diode D ~ D4 composition, for being by the two-way AC signal of input is whole
Direct current signal, and using the signal after rectification as the second supply voltage VP2, supply voltage is provided for switch stop unit.
Preferably, in order to protect circuit, a varistor is bridged between the first phase voltage A1 and third phase voltage C1
VAR plays the role of overvoltage protection for absorbing high pressure.
Preferably, the second supply voltage VP2 passes sequentially through voltage-stabiliser tube ZD2 and ZD1 ground connection, carries out voltage stabilizing.It is described simultaneously
Pass through diode ZD1 ground connection voltage stabilizings after the resistance R1 of connection and capacitance C1 decompressions.
The present embodiment can provide voltage by the stop unit that is converted to third phase voltage, can realize self-supporting electricity
Pressure, does not need the external world and power supply is provided separately.
Preferably, referring to Fig. 6, the supply voltage, further includes：
When the supply voltage deficiency, the voltage compensation unit of voltage is compensated.
The voltage compensation unit uses compensating switch pipe TR3, the collector of compensating switch pipe TR3 to power with described second
Voltage VP2 is connected, and the base stage of the compensating switch pipe TR3 is connected by resistance R16 with the second supply voltage VP2,
Base stage is grounded by zener diode ZD7, and the emitter-base bandgap grading of compensating switch pipe TR3 is connected with the first supply voltage VP1, and emitter-base bandgap grading is same
When be grounded by resistance R17.When the first supply voltage VP1 is less than setting value, the TR3 conductings of compensating switch pipe, described second supplies
Piezoelectric voltage VP2, which provides voltage, makes the first supply voltage VP1 increase, and when reaching the setting value, compensating switch pipe TR3 is closed
It is disconnected, therefore the second supply voltage VP2 can be stablized the first supply voltage VP1 in setting value by voltage compensation unit.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
- The phase misphase detection method 1. a kind of elevator three phase mains breaks, which is characterized in that including：By the first phase voltage and the second phase voltage respectively after overvoltage is converted carry out phase sequence comparison, and using comparison result as Switch the startup voltage of stop unit；If startup voltage is low level, the relay switch module for switching stop unit disconnects, and stop relay electric-loss is then controlled Elevator brake system stop elevator processed；If startup voltage is high level, the relay switch module conducting of stop unit is switched, stop relay obtains electric, elevator Braking system works normally.
- The phase misphase detection method 2. a kind of elevator three phase mains according to claim 1 breaks, which is characterized in that the detection side Method further includes：Third phase voltage and the first phase voltage are obtained into the second supply voltage as switch stop list after step-down rectifier respectively The supply voltage of member.
- The phase misphase detection method 3. a kind of elevator three phase mains according to claim 1 breaks, which is characterized in that the switch Stop unit further includes：The load handover module coupled with the relay switch module；When the relay switch module is connected, the load handover module is not turned on, and stop relay is accessed as load Switch stop unit；When the relay switch module disconnects, load handover module conducting, and by pair of the load handover module Ground resistance access switch stop unit.
- 4. according to a kind of disconnected phase misphase detection method of elevator three phase mains as claimed in any one of claims 1 to 3, feature exists In the comparison that the first phase voltage and the second phase voltage are carried out after overvoltage is converted to phase sequence respectively includes the following steps：By the first phase voltage by being depressured and the first comparison voltage, first comparison voltage being used as to again pass by after halfwave rectifier The first supply voltage is used as after halfwave rectifier；By the second phase voltage by being depressured and the second comparison voltage, second comparison voltage being used as to again pass by after halfwave rectifier It is connected with first supply voltage after halfwave rectifier；First supply voltage provides operating voltage for waveform shaping circuit and sequential comparing unit；Respectively by waveform shaping circuit, corresponding be made into is appropriate for sequential for first comparison voltage and the second comparison voltage The first voltage square wave and second voltage square wave compared；The first voltage square wave and second voltage square wave carry out the comparison of sequential by sequential comparing unit.
- The phase misphase detection method 5. a kind of elevator three phase mains according to claim 4 breaks, which is characterized in that described first Supply voltage, including：For when first supply voltage is less than a certain setting value, the compensation of voltage to be carried out for first supply voltage Voltage compensating circuit.
- The phase misphase detection device 6. a kind of elevator three phase mains breaks, which is characterized in that including：First phase voltage is obtained to the first voltage converting unit of the first comparison voltage after overvoltage is converted；Second phase voltage is obtained to the second voltage converting unit of the second comparison voltage after overvoltage is converted；Waveform shaping unit, for first comparison voltage and the second comparison voltage to be shaped as the first square wave accordingly respectively Signal and the second square-wave signal；The first voltage square wave and second voltage square wave are subjected to the phase sequence comparing unit that phase sequence relatively obtains starting voltage；WithJudge start voltage whether can starting relay switch module, if cannot start, relay disconnects stop elevator Switch stop unit.
- The phase misphase detection device 7. a kind of elevator three phase mains according to claim 6 breaks, which is characterized in that the detection fills It sets, further includes：By third phase voltage and the first phase voltage respectively by decompression, and the signal after decompression is obtained the after full-wave rectification The tertiary voltage converting unit of two supply voltages.
- The phase misphase detection device 8. a kind of elevator three phase mains according to claim 6 breaks, which is characterized in that described first Voltage conversion unit, including：The first voltage reduction module for being depressured the first phase voltage of input by voltage reduction module；The first phase voltage after the decompression is carried out to the first half-wave rectification block of halfwave rectifier.
- The phase misphase detection device 9. a kind of elevator three phase mains according to claim 6 breaks, which is characterized in that described second Voltage conversion unit, including：The second voltage reduction module for being depressured the second phase voltage of input by voltage reduction module；The second phase voltage after the decompression is carried out to the second half-wave rectification block of halfwave rectifier.
- The phase misphase detection device 10. a kind of elevator three phase mains according to any one of claim 6 ~ 9 breaks, feature exist In the switch stop unit further includes：With the concatenated relay switch module of elevator relay coil；WithIt is coupled with the relay switch module, for the on off state according to the relay switch module, to the switch The load of stop unit is the load switching mould of stop relay or the load handover module switched over to ground resistance Block.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810992227.7A CN108750855B (en) | 2018-08-29 | 2018-08-29 | Method and device for detecting open-phase and wrong-phase of three-phase power supply of elevator |
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| CN201810992227.7A CN108750855B (en) | 2018-08-29 | 2018-08-29 | Method and device for detecting open-phase and wrong-phase of three-phase power supply of elevator |
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| CN108750855B CN108750855B (en) | 2024-02-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113985107A (en) * | 2021-11-23 | 2022-01-28 | 珠海格力电器股份有限公司 | Voltage detection method and device and readable storage medium |
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| JPH0715864A (en) * | 1993-06-29 | 1995-01-17 | Tsubakimoto Chain Co | Three-phase voltage supply circuit apparatus |
| CN104749479A (en) * | 2013-12-30 | 2015-07-01 | 刘培 | Power supply phase failure detecting method and device for elevator |
| CN105356416A (en) * | 2015-12-09 | 2016-02-24 | 上海辰竹仪表有限公司 | Three-phase alternating voltage phase sequence monitoring system |
| CN205283093U (en) * | 2015-12-09 | 2016-06-01 | 上海辰竹仪表有限公司 | Three -phase AC voltage phase sequence monitored control system |
| CN205653017U (en) * | 2016-05-24 | 2016-10-19 | 江苏亿莱顿智能科技有限公司 | Automatic stop formula escalator |
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- 2018-08-29 CN CN201810992227.7A patent/CN108750855B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0715864A (en) * | 1993-06-29 | 1995-01-17 | Tsubakimoto Chain Co | Three-phase voltage supply circuit apparatus |
| CN104749479A (en) * | 2013-12-30 | 2015-07-01 | 刘培 | Power supply phase failure detecting method and device for elevator |
| CN105356416A (en) * | 2015-12-09 | 2016-02-24 | 上海辰竹仪表有限公司 | Three-phase alternating voltage phase sequence monitoring system |
| CN205283093U (en) * | 2015-12-09 | 2016-06-01 | 上海辰竹仪表有限公司 | Three -phase AC voltage phase sequence monitored control system |
| CN205653017U (en) * | 2016-05-24 | 2016-10-19 | 江苏亿莱顿智能科技有限公司 | Automatic stop formula escalator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113985107A (en) * | 2021-11-23 | 2022-01-28 | 珠海格力电器股份有限公司 | Voltage detection method and device and readable storage medium |
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| CN108750855B (en) | 2024-02-13 |
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Address after: 461000 south section of Yanan Road, Xuchang economic and Technological Development Zone, Henan Applicant after: Xiji Xunda Elevator Co.,Ltd. Address before: 461000 south section of Yanan Road, Xuchang economic and Technological Development Zone, Henan Applicant before: XJ SCHINDLER (XUCHANG) ELEVATOR Co.,Ltd. |
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