CN104749479A - Power supply phase failure detecting method and device for elevator - Google Patents
Power supply phase failure detecting method and device for elevator Download PDFInfo
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- CN104749479A CN104749479A CN201310753715.XA CN201310753715A CN104749479A CN 104749479 A CN104749479 A CN 104749479A CN 201310753715 A CN201310753715 A CN 201310753715A CN 104749479 A CN104749479 A CN 104749479A
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Abstract
The invention provides a power supply phase failure detecting method and device for an elevator. The method is that a detecting result is outputted according to the closing and opening state of a relay J; L1-L3 of a three-phase power supply are used as the circuit power supplies, and the power supply circuit has the function of detecting the phase failure of the L1 phase and the L3 phase; the L2 phase is detected through a detecting circuit based on the optocoupler application technology; a rectifier diode D1 and a current limiting resistor R1 are connected in series and then connected to the L2-L3 of the three-phase power supply to form a half-wave rectifier circuit; C1 is a filter capacitor; an input LED of the optocoupler (OC) is connected to the L2-L3 half-wave rectifier circuit through a current limiting current R2; the output two-way controlled silicon of the OC is connected in series with the relay J to control the closing and opening. The detection method is simple and practical; the detecting device employs few circuit elements, so that the cost performance is high.
Description
Technical field
The present invention relates to the safety guard of elevator supply system, specifically, be a kind of in elevator control cabinet to the detection method of elevator power supply source generation open phase fault and pick-up unit thereof.
Background technology
In view of the special equipment that elevator is manned; for ensureing the security of operation of elevator; disconnected, the fault-phase protection of electric power system are required higher and have strict verification arrangement, the power supply of every portion elevator is disconnected, fault-phase protection function just can must come into operation after the assay was approved through quality inspection technical body.
Relevant national legislation standard is broken about elevator supply, the safety specifications of fault-phase protection has:
A. should to possess electric power system disconnected mutually and fault-phase protection function for elevator, and when mutually disconnected or misphase appear in elevator supply circuit, elevator is answered out of service and kept halted state.
B. elevator runs and has nothing to do with phase sequence, can not establish fault-phase protection function.
For meeting above-mentioned requirements, the elevator control cabinet of prior art all should arrange dislocation phase protective relay.The input end of dislocation phase protective relay is connected with elevator power supply source, and output terminal is connected with elevator safety circuit, running control circuit; Detected by dislocation phase protective relay and export disconnected, the misphase fault-signal of elevator power supply source, cutting off by elevator safety circuit, running control circuit the power supply driving main frame.
Existing elevator generally adopts frequency control electric drive system, and the modern technologies such as elevator control cabinet assembled by application continuum electric life controller.Because the operation of this elevator and phase sequence have nothing to do, only can arrange phase failure protection function can meet safety specifications.
The patent retrieving open phase detection aspect is more, and its technical scheme mainly comprises following three types:
1. detect the change of the voltage neutral point voltage-to-ground of three-phase supply, during three-phase voltage balance, the neutral point potential of star connection is zero; When there is open phase fault, neutral point potential can significantly displacement, realizes pile defection with voltage detecting circuit.Patents has CN103166188A phase loss protector for three-phase, a CN201616655U open phases of three-phase power source testing circuit etc.
2. detect the voltage waveform of three-phase supply; to each phase power signal sampling; identify whether to there is open-phase fault by wave form analysis circuit; realize power phase shortage to detect, Patents has the protecting control method, CN2831566Y open phases of three-phase power source protection controller etc. of a CN102798770A default phase of frequency converter.
3. gather the phase voltage of three-phase supply respectively, two-phase wherein or three-phase voltage signal are input to AND circuit identification, when three-phase supply is normal, AND circuit exports noble potential, when open-phase fault appears in the phase in three-phase supply or two-phase or three-phase, AND circuit exports electronegative potential, realize power phase shortage to detect, Patents has CN102426302A three-phase power input phase-loss detection circuit, a CN101413975A three-phase power input phase-loss detection circuit etc.
Technique scheme, the component number that testing circuit uses is more, and its testing circuit all have employed DC low-voltage and powers, and needs to obtain from elevator power supply source through power supply change-over device, and cost compared with Alternating Current Power Supply scheme is higher with directly adopting.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of elevator supply open phase detection method providing cost performance higher and pick-up unit thereof
The technical solution adopted for the present invention to solve the technical problems is: a kind of elevator supply open phase detection method, comprises the detection and the output that three-phase supply are occurred to open phase fault, comprise the following steps:
(1) by adhesive and the release conditions output detections result of relay (J), (J) adhesive represents in the three-phase supply of elevator supply without open phase fault; (J) release represents that open phase fault appears in a wherein phase in three-phase supply or two-phase or three-phase;
(2) use the circuit power of wherein two-phase (L1)-(L3) output detecting apparatus of three-phase supply, the adhesive of relay (J) be released through driving circuit and control;
(3) electric voltage observation circuit is used to connect (L2)-(L3) of three-phase supply, control driving circuit conducting when (L2)-(L3) voltage is normal by electric voltage observation circuit, control driving circuit when (L2)-(L3) voltage lacks by electric voltage observation circuit and end;
(4) relay (J) realizes the detection of elevator supply open phase fault and output by following manner:
A. when elevator supply is normal, by (L1)-(L3) the output circuit power supply of three-phase supply, through electric voltage observation circuit identification (L2)-(L3) for voltage is normal, control driving circuit conducting, relay (J) adhesive, exports as elevator supply is without open phase fault;
B. at (L1), (L3) of three-phase supply, wherein there is disconnected phase time in a phase or two-phase, cause (L1)-(L3) circuit power of exporting interrupts, relay (J) discharges because non-transformer is powered, and exports as elevator supply has open phase fault;
C. there is disconnected phase time at (L2) of three-phase supply, be abnormal through electric voltage observation circuit identification (L2)-(L3) voltage, control driving circuit ends, and relay (J) discharges, and exports as elevator supply has open phase fault.
Implement the elevator supply phase interruption testing device of above-mentioned detection method, comprise electric voltage observation circuit, driving circuit, circuit power and output relay, the coil rating voltage of described relay (J) is identical with the voltage of three-phase supply, described circuit power directly adopts the AC power of elevator supply system, relay (J) one end is connected with (L1) of three-phase supply, and the other end accesses (L3) of three-phase supply after overdrive circuit; (L2) of three-phase supply connects electric voltage observation circuit, and electric voltage observation circuit connects driving circuit.
Described electric voltage observation circuit is the testing circuit based on optocoupler application technology, comprises commutation diode (D1), current-limiting resistance (R1), filter capacitor C1 and optocoupler (OC), current-limiting resistance (R2); By (R1) series connection (D1) anode, (D1) negative electrode accesses (L2) of three-phase supply, form (L2)-(L3) half-wave rectifying circuit with (L3) of three-phase supply, (C1) is the output filter capacitor of (L2)-(L3) half-wave rectifying circuit; The input light emitting diode of optocoupler (OC) is through current-limiting resistance (R2) access (L2)-(L3) half-wave rectifying circuit, and the output of optocoupler (OC) is bidirectional triode thyristor.
Described driving circuit is bidirectional triode thyristor driving circuit, its bidirectional triode thyristor is the output unit of optocoupler (OC), its one end connects (L3) of three-phase supply, access after other end series relay (J) (L1) of three-phase supply, conducting and the input light emitting diode trigging control of cut-off by optocoupler (OC) of bidirectional triode thyristor.
The capacity setting of described filter capacitor C1 is, maintains triggering optocoupler (OC) and export conducting (1/40-1/25) second after open phase fault appears in (L2) of three-phase supply.
The present invention compared with prior art, has the following advantages and beneficial effect:
1. the circuit power supply of pick-up unit directly adopts the alternating voltage of elevator supply, does not need power supply converter device, and circuit cost reduces, and power fail rate reduces.
2. detection method brief and practical, the circuit components quantity of pick-up unit reduces more than 50%.
3. the power consumption of pick-up unit is less, power supply total current less than 10mA, power and energy saving.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is embodiments of the invention circuit theory diagrams.
Embodiment
In Fig. 1, L1, L2, L3 are the input terminal of elevator supply three-phase supply; J is miniature relay, the rated voltage of its pull-in winding is identical with power line voltage, disconnected phase information is exported by moving together contact J-1, break contact J-2, J attracting state represents that three-phase supply is without open phase fault, and J release conditions represent that open phase fault appears in a wherein phase in three-phase supply or two-phase or three-phase; OC is optocoupler, is that a kind of zero cross fired bidirectional triode thyristor exports optocoupler, for electric voltage observation circuit and relay drive circuit.
Relay J in figure uses the L1-L3 of three-phase supply to be working power, and coil one end of relay J is connected with L1, and the other end accesses L3 after connecting with the output bidirectional triode thyristor of optocoupler OC.Namely this working power circuit itself forms the measuring ability that L1 phase and L3 phase are occurred to for open phase fault, and wherein the disappearance of any phase all can make the power supply of relay J interrupt, and forms relay J release, exports disconnected phase information.
Detected the L2 of three-phase supply by optocoupler OC, the commutation diode D1 in figure accesses three-phase supply L2-L3 after connecting with current-limiting resistance R1 forms half-wave rectifying circuit, and C1 is output filter capacitor; The input light emitting diode of optocoupler OC accesses L2-L3 half-wave rectifying circuit through current-limiting resistance R2, and the output bidirectional triode thyristor of optocoupler OC is connected with relay J and implemented the control of adhesive and release.The discharge capacity of filter capacitor C1 is designed to drive the output bidirectional triode thyristor of OC to keep conducting 1/40 second to 1/25 second, when L2-L3 voltage is normal, C1 both end voltage is higher, electric current flows through the input light emitting diode of OC through R2, thus triggers the output bidirectional triode thyristor conducting of OC; When L2-L3 voltage lacks, C1 both end voltage can reduce rapidly, causes the input LED current of OC to be ended, and exports bidirectional triode thyristor and blocks.The optocoupler OC adopting zero cross fired bidirectional triode thyristor to export implements voltage monitoring and relay drived control, and simple circuit, Electro Magnetic Compatibility is good.
Below launch to describe to invention has been with embodiment by reference to the accompanying drawings, this description does not have restricted, and be also the embodiment that the present invention is formed shown in accompanying drawing, technical scheme of the present invention is not limited thereto.Those of ordinary skill in the art should be understood that, when not departing from design philosophy of the present invention, reality of the present invention implements the change also had in some details.So as long as aim according to the invention, these changes include within protection scope of the present invention.
Claims (5)
1. an elevator supply open phase detection method, comprises the detection and the output that three-phase supply are occurred to open phase fault, it is characterized in that, comprise the following steps:
(1) by adhesive and the release conditions output detections result of relay (J), (J) adhesive represents in the three-phase supply of elevator supply without open phase fault; (J) release represents that open phase fault appears in a wherein phase in three-phase supply or two-phase or three-phase;
(2) use the circuit power of wherein two-phase (L1)-(L3) output detecting apparatus of three-phase supply, the adhesive of relay (J) be released through driving circuit and control;
(3) electric voltage observation circuit is used to connect (L2)-(L3) of three-phase supply, control driving circuit conducting when (L2)-(L3) voltage is normal by electric voltage observation circuit, control driving circuit when (L2)-(L3) voltage lacks by electric voltage observation circuit and end;
(4) relay (J) realizes the detection of elevator supply open phase fault and output by following manner:
A. when elevator supply is normal, by (L1)-(L3) the output circuit power supply of three-phase supply, through electric voltage observation circuit identification (L2)-(L3) for voltage is normal, control driving circuit conducting, relay (J) adhesive, exports as elevator supply is without open phase fault;
B. at (L1), (L3) of three-phase supply, wherein there is disconnected phase time in a phase or two-phase, cause (L1)-(L3) circuit power of exporting interrupts, relay (J) discharges because non-transformer is powered, and exports as elevator supply has open phase fault;
C. there is disconnected phase time at (L2) of three-phase supply, be abnormal through electric voltage observation circuit identification (L2)-(L3) voltage, control driving circuit ends, and relay (J) discharges, and exports as elevator supply has open phase fault.
2. one kind implements the claims the elevator supply phase interruption testing device of detection method described in 1, comprise electric voltage observation circuit, driving circuit, circuit power and output relay, it is characterized in that, the coil rating voltage of described relay (J) is identical with the voltage of three-phase supply, described circuit power directly adopts the AC power of elevator supply system, relay (J) one end is connected with (L1) of three-phase supply, and the other end accesses (L3) of three-phase supply after overdrive circuit; (L2) of three-phase supply connects electric voltage observation circuit, and electric voltage observation circuit connects driving circuit.
3. elevator supply phase interruption testing device according to claim 2, it is characterized in that, described electric voltage observation circuit is the testing circuit based on optocoupler application technology, comprises commutation diode (D1), current-limiting resistance (R1), filter capacitor C1 and optocoupler (OC), current-limiting resistance (R2); By (R1) series connection (D1) anode, (D1) negative electrode accesses (L2) of three-phase supply, form (L2)-(L3) half-wave rectifying circuit with (L3) of three-phase supply, (C1) is the output filter capacitor of (L2)-(L3) half-wave rectifying circuit; The input light emitting diode of optocoupler (OC) is through current-limiting resistance (R2) access (L2)-(L3) half-wave rectifying circuit, and the output of optocoupler (OC) is bidirectional triode thyristor.
4. elevator supply phase interruption testing device described in 2 as requested, it is characterized in that, described driving circuit is bidirectional triode thyristor driving circuit, its bidirectional triode thyristor is the output unit of optocoupler (OC), its one end connects (L3) of three-phase supply, access after other end series relay (J) (L1) of three-phase supply, conducting and the input light emitting diode trigging control of cut-off by optocoupler (OC) of bidirectional triode thyristor.
5. elevator supply phase interruption testing device according to claim 3, it is characterized in that, the capacity setting of described filter capacitor C1 is, maintains triggering optocoupler (OC) and export conducting (1/40-1/25) second after open phase fault appears in (L2) of three-phase supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310753715.XA CN104749479B (en) | 2013-12-30 | 2013-12-30 | A kind of elevator supply open phase detection method and its detection means |
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| CN201310753715.XA CN104749479B (en) | 2013-12-30 | 2013-12-30 | A kind of elevator supply open phase detection method and its detection means |
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| CN104749479A true CN104749479A (en) | 2015-07-01 |
| CN104749479B CN104749479B (en) | 2018-01-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680506A (en) * | 2016-01-21 | 2016-06-15 | 江苏蒙哥马利电梯有限公司 | Power supply method for elevator car storage battery |
| CN108750855A (en) * | 2018-08-29 | 2018-11-06 | 西继迅达（许昌）电梯有限公司 | A kind of disconnected phase misphase detection method and device of elevator three phase mains |
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| JP2005003626A (en) * | 2003-06-16 | 2005-01-06 | Matsushita Electric Ind Co Ltd | Connection status judging method of three-phase power source and device therefor |
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| CN202217019U (en) * | 2011-09-15 | 2012-05-09 | 广州三晶电气有限公司 | Three-phase supply input open phase detection circuit |
| CN103434899A (en) * | 2013-09-03 | 2013-12-11 | 天津豪雅科技发展有限公司 | Integrated controller for elevator |
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- 2013-12-30 CN CN201310753715.XA patent/CN104749479B/en not_active Expired - Fee Related
Patent Citations (6)
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| JP2005003626A (en) * | 2003-06-16 | 2005-01-06 | Matsushita Electric Ind Co Ltd | Connection status judging method of three-phase power source and device therefor |
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| CN103434899A (en) * | 2013-09-03 | 2013-12-11 | 天津豪雅科技发展有限公司 | Integrated controller for elevator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105680506A (en) * | 2016-01-21 | 2016-06-15 | 江苏蒙哥马利电梯有限公司 | Power supply method for elevator car storage battery |
| WO2017124796A1 (en) * | 2016-01-21 | 2017-07-27 | 江苏蒙哥马利电梯有限公司 | Power supply method for elevator car storage battery |
| CN108750855A (en) * | 2018-08-29 | 2018-11-06 | 西继迅达（许昌）电梯有限公司 | A kind of disconnected phase misphase detection method and device of elevator three phase mains |
| CN108750855B (en) * | 2018-08-29 | 2024-02-13 | 西继迅达电梯有限公司 | Method and device for detecting open-phase and wrong-phase of three-phase power supply of elevator |
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| CN104749479B (en) | 2018-01-16 |
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Effective date of registration: 20151105 Address after: 300384 Tianjin City Huayuan Industrial Zone Ziyuan Road No. 6 Building 1 room 3030 Applicant after: Tianjin Haoya Science & Technology Development Co., Ltd. Address before: 300164, No. 30, ERON garden, Zeng Xing kiln, Cheng Lin Street, Dongli, Tianjin Applicant before: Liu Pei |
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Granted publication date: 20180116 Termination date: 20191230 |