CN105502121A - Active detection apparatus and detection method of two-phase failure in elevator tractive motor - Google Patents
Active detection apparatus and detection method of two-phase failure in elevator tractive motor Download PDFInfo
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- CN105502121A CN105502121A CN201610050956.1A CN201610050956A CN105502121A CN 105502121 A CN105502121 A CN 105502121A CN 201610050956 A CN201610050956 A CN 201610050956A CN 105502121 A CN105502121 A CN 105502121A
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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
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- Maintenance And Inspection Apparatuses For Elevators (AREA)
- Elevator Control (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention provides an active detection apparatus of two-phase failure in an elevator tractive motor. The active detection apparatus is characterized by comprising an elevator operation frequency converter P, an elevator operation contactor S and a current detector A, the elevator operation contactor has three normally open contacts, a first normally open contact S1, a second normally open contact S2 and a third normally open contact S3, one end of the first normally open contact, one end of the second normally open contact S2 and one end of the third normally open contact S3 are connected with U-phase end, V-phase end and W-phase end of a three-phase motor, respectively, the other ends of the three contacts are connected with phase A, phase B and phase C of a three-phase power supply, respectively, the current detector A is serially connected with a three-phase motor M, and an output end of the current detector A is connected with the operation frequency converter P. The active detection of two-phase failure of the motor can be implemented just by controlling on and off of the elevator operation contactor S and detecting current flowing through the three-phase motor in the off process of the current detector A, the detection structure is very simple, elevator operation reliability after using the apparatus can be improved, chances of an elevator shutting people inside are decreased, action frequency of a mechanical protector is reduced, and damage from accidents is minimized.
Description
Technical field
The invention belongs to elevator technology field, be specifically related to active detecting device and method of inspection thereof that a kind of elevator hoisting motor lacks two-phase.
Background technology
Under control of the control system, drive towing machine forward or reverse, motor lacks a phase time to frequency converter, and frequency converter detects excess current and reports an error, motor lacks two phase times, frequency converter can not detect excess current, because frequency converter can not detect electric current, once controller receives instruction, meet entry condition, perform a series of action immediately, finally make the action of operation contactless switch, the action of band-type brake contactless switch, under portative effect in place, elevator will be in the state of car of freely slipping, although by comparison coder, existing technology also detects that target velocity that speed and elevator run is inconsistent and judges, but elevator starts, final result is that elevator is in not gate district and out of service, this safety method is also allow in existing elevator manufacturer's standard, but be the passive measure after a kind of et out of order, still two kinds of accidents can be caused: one is that elevator is in not gate district and out of service, elevator is forbidden opening the door, cause and close people's accident, two be elevator freely slip vehicle speed too high time, cause mechanical device (such as velocity limiter, safety tongs, wire holder etc.) action.
Summary of the invention
For solving the problems of the technologies described above; the invention provides active detecting device and detection thereof that a kind of elevator hoisting motor lacks two-phase; active detecting is pinpointed the problems; elevator reliability of operation can be improved after using; reduce elevator close the probability of people and reduce the action frequency of Machine guarding, the harm that accident occurs is down to minimum.
For achieving the above object, technical scheme of the present invention is as follows: a kind of elevator hoisting motor lacks the active detecting device of two-phase, it is characterized in that: comprise elevator and run frequency converter P, elevator runs contactless switch S and current probe A, described elevator runs contactless switch and has three normally open contacts, be respectively the first normally open contact S1, second normally open contact S2 and the 3rd normally open contact S3, first normally open contact S1, the U phase that second normally open contact S2 is connected three phase electric machine M respectively with one end of the 3rd normally open contact S3 three is held, V phase is held and is held with W phase, the other end of three connects the A phase of three phase mains respectively, B phase and C phase, described current probe A connects with three phase electric machine M, its mouth connects described operation frequency converter P.
In a preferred embodiment of the present invention, comprising described three phase electric machine M is further synchronous dynamo.
In a preferred embodiment of the present invention, comprising described three phase electric machine M is further asynchronous dynamo.
For achieving the above object, technical scheme of the present invention is as follows: a kind ofly utilize the detecting device described in claim 1 or 3 to lack the method for inspection of two-phase to elevator hoisting motor, it is characterized in that, comprise the following steps: first elevator operation contactless switch S closes, detected the actual current I of motor by current probe A, compare the no-load current I that actual current I and asynchronous three phase electric machine M is tuning
0if I=0 or I is far smaller than I
0, illustrate that three phase electric machine M no current passes through, can judge now three phase electric machine M lack two-phase (or more), now, by frequency converter P report fault, avoid band-type brake to open, elevator is now in a district.
For achieving the above object, technical scheme of the present invention is as follows: a kind ofly utilize the detecting device described in claim 1 or 2 to lack the method for inspection of two-phase to elevator hoisting motor, it is characterized in that, comprise the following steps: first, after elevator operation contactless switch S is closed, the detection voltage of the duration 0.6S of 10% is exported by frequency converter P, the three phase current of motor is detected by current probe A, whether balance judge whether scarce two-phase by comparing three phase current: if three-phase balance, elevator normally starts; Otherwise if three-phase current unbalance, then report fault at once, avoid band-type brake to open, elevator is now in a district.
The invention has the beneficial effects as follows: elevator hoisting motor of the present invention lacks the active detecting device of two-phase; run the electric current flowing through three phase electric machine in the break-make of contactless switch and current probe make and break process carry out detecting the active detecting that can complete motor and lack two-phase only by controlling elevator; detection architecture is very simple; elevator reliability of operation can be improved after using; reduce elevator close the probability of people and reduce the action frequency of Machine guarding, the harm that accident occurs is down to minimum.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in embodiment of the present invention technology, be briefly described to the accompanying drawing used required in the description of embodiment technology below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit structure diagram of the preferred embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
As shown in Figure 1, the active detecting device that a kind of elevator hoisting motor lacks two-phase is disclosed in the present embodiment, comprise elevator and run frequency converter P, elevator runs contactless switch S and current probe A, described elevator runs contactless switch and has three normally open contacts, be respectively the first normally open contact S1, second normally open contact S2 and the 3rd normally open contact S3, first normally open contact S1, the U phase that second normally open contact S2 is connected three phase electric machine M respectively with one end of the 3rd normally open contact S3 three is held, V phase is held and is held with W phase, the other end of three connects the A phase of three phase mains respectively, B phase and C phase, described current probe A connects with three phase electric machine M, its mouth connects described operation frequency converter P.
Based on said structure, the method of its active detecting is as follows: when the present invention is asynchronous three phase electric machine as the three phase electric machine M of embodiment one, elevator run contactless switch S closed after, detected the actual current I of motor by current probe A, compare actual current I and the tuning no-load current I of asynchronous dynamo
0if I=0 or I is far smaller than I
0, illustrate that motor no current passes through, can judge now three phase electric machine M lack two-phase (or more), now, by frequency converter report fault, avoid band-type brake to open, elevator is now in a district, door-opened elevator, avoids closing people accident.
Embodiment two,
The difference of the present embodiment and embodiment one is that three phase electric machine M is synchronous dynamo, the method of its active detecting is as follows: after elevator operation contactless switch S is closed, the detection voltage of the duration 0.6S of 10% is exported by frequency converter P, the three phase current of motor is detected by current probe A, whether balance judge whether scarce two-phase by comparing three phase current: if three-phase balance, elevator normally starts; Otherwise if three-phase current unbalance, then report fault at once, avoid band-type brake to open, elevator is now in a district, door-opened elevator, avoid closing people's accident.
Therefore; elevator hoisting motor of the present invention lacks the active detecting device of two-phase; run contactless switch S break-make and the current probe A electric current flowing through three phase electric machine in process that breaks carry out detecting the active detecting that can complete motor and lack two-phase only by controlling elevator; detection architecture is very simple; elevator reliability of operation can be improved after using; reduce elevator close the probability of people and reduce the action frequency of Machine guarding, the harm that accident occurs is down to minimum.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. an elevator hoisting motor lacks the active detecting device of two-phase, it is characterized in that: comprise elevator and run frequency converter (P), elevator runs contactless switch (S) and current probe (A), described elevator runs contactless switch and has three normally open contacts, be respectively the first normally open contact (S1), second normally open contact (S2) and the 3rd normally open contact (S3), first normally open contact (S1), the U phase that second normally open contact (S2) is connected three phase electric machine (M) respectively with one end of the 3rd normally open contact (S3) three is held, V phase is held and is held with W phase, the other end of three connects the A phase of three phase mains respectively, B phase and C phase, described current probe (A) is connected with three phase electric machine (M), its mouth connects described operation frequency converter (P).
2. elevator hoisting motor according to claim 1 lacks the active detecting device of two-phase, it is characterized in that: described three phase electric machine (M) is synchronous dynamo.
3. elevator hoisting motor according to claim 1 lacks the active detecting device of two-phase, it is characterized in that: described three phase electric machine (M) is asynchronous dynamo.
4. one kind utilizes the detecting device described in claim 1 or 3 to lack the method for inspection of two-phase to elevator hoisting motor, it is characterized in that, comprise the following steps: first elevator operation contactless switch (S) closes, the actual current I of motor is detected by current probe (A), relatively actual current I and the tuning no-load current I0 of asynchronous three phase electric machine (M), if I=0 or I is far smaller than I0, illustrate that three phase electric machine (M) no current passes through, can judge now three phase electric machine M lack two-phase (or more), now, fault is reported by frequency converter (P), band-type brake is avoided to open, elevator is now in a district.
5. one kind utilizes the detecting device described in claim 1 or 2 to lack the method for inspection of two-phase to elevator hoisting motor, it is characterized in that, comprise the following steps: first, after elevator operation contactless switch (S) is closed, the detection voltage of the duration 0.6S of 10% is exported by frequency converter (P), detected the three phase current of motor by current probe (A), whether balance judge whether scarce two-phase by comparing three phase current: if three-phase balance, elevator normally starts; Otherwise if three-phase current unbalance, then report fault at once, avoid band-type brake to open, elevator is now in a district.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610050956.1A CN105502121B (en) | 2016-01-26 | 2016-01-26 | Elevator hoisting motor lacks the active detecting device and its detection method of two-phase |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610050956.1A CN105502121B (en) | 2016-01-26 | 2016-01-26 | Elevator hoisting motor lacks the active detecting device and its detection method of two-phase |
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| Publication Number | Publication Date |
|---|---|
| CN105502121A true CN105502121A (en) | 2016-04-20 |
| CN105502121B CN105502121B (en) | 2018-11-09 |
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| CN201610050956.1A Active CN105502121B (en) | 2016-01-26 | 2016-01-26 | Elevator hoisting motor lacks the active detecting device and its detection method of two-phase |
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Citations (7)
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|---|---|---|---|---|
| CN1030502A (en) * | 1987-07-08 | 1989-01-18 | 莫家华 | Electromagnetic sensing type protection principle for 3-phase motor |
| CN2387648Y (en) * | 1997-06-18 | 2000-07-12 | 潘阔海 | Phase loss protector for three-phase power source |
| CN101752830A (en) * | 2008-12-06 | 2010-06-23 | 李薇薇 | Open-phase protection contactor |
| CN102004224A (en) * | 2009-08-31 | 2011-04-06 | 比亚迪股份有限公司 | Three-phase motor phase failure detection system and detection method thereof |
| CN102035180A (en) * | 2010-12-07 | 2011-04-27 | 河南省电力公司许昌供电公司 | Comprehensive protection device for three-phase alternating current asynchronous motor |
| JP2015226403A (en) * | 2014-05-29 | 2015-12-14 | 日本高圧電気株式会社 | Phase loss prevention circuit |
| CN205312812U (en) * | 2016-01-26 | 2016-06-15 | 无锡新纺欧迪诺电梯有限公司 | Elevator tows motor and lacks double -phase initiative detection device |
-
2016
- 2016-01-26 CN CN201610050956.1A patent/CN105502121B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030502A (en) * | 1987-07-08 | 1989-01-18 | 莫家华 | Electromagnetic sensing type protection principle for 3-phase motor |
| CN2387648Y (en) * | 1997-06-18 | 2000-07-12 | 潘阔海 | Phase loss protector for three-phase power source |
| CN101752830A (en) * | 2008-12-06 | 2010-06-23 | 李薇薇 | Open-phase protection contactor |
| CN102004224A (en) * | 2009-08-31 | 2011-04-06 | 比亚迪股份有限公司 | Three-phase motor phase failure detection system and detection method thereof |
| CN102035180A (en) * | 2010-12-07 | 2011-04-27 | 河南省电力公司许昌供电公司 | Comprehensive protection device for three-phase alternating current asynchronous motor |
| JP2015226403A (en) * | 2014-05-29 | 2015-12-14 | 日本高圧電気株式会社 | Phase loss prevention circuit |
| CN205312812U (en) * | 2016-01-26 | 2016-06-15 | 无锡新纺欧迪诺电梯有限公司 | Elevator tows motor and lacks double -phase initiative detection device |
Non-Patent Citations (2)
| Title |
|---|
| 刘连昆: "《电梯安全技术》", 30 September 1988, 纺织工业出版社 * |
| 白玉岷: "《电动机及控制实用技术手册》", 31 March 2015, 机械工业出版社 * |
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| CN105502121B (en) | 2018-11-09 |
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