CN102025133A - Safety circuit of elevator - Google Patents
Safety circuit of elevator Download PDFInfo
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- CN102025133A CN102025133A CN2010102663129A CN201010266312A CN102025133A CN 102025133 A CN102025133 A CN 102025133A CN 2010102663129 A CN2010102663129 A CN 2010102663129A CN 201010266312 A CN201010266312 A CN 201010266312A CN 102025133 A CN102025133 A CN 102025133A
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- elevator
- safety circuit
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Abstract
The invention provides a safety circuit of an elevator. According to the embodiment, the safety circuit of the elevator comprises an elevator safety circuit net (10) and a grounding judgment part (11A, 11B,12). The safety circuit net (10) is composed by safety confirmation switches being connected in series, and is separated from the circuit net for elevator control, and is connected to a control power supply circuit (7) which forms an elevator control power supply by adopting a three-phase electric network source (1) as an user power supply. The grounding determination part (11A, 11B,12) determines whether the elevator safety circuit net (10) is grounded or not based on the forwarding circuit and backwarding circuit from the power supply circuit (7) to the elevator safety circuit net (10).
Description
Technical field
The present invention relates to the safety circuit of elevator.
Background technology
Elevator has the circuit network of the control usefulness of the elevator that is connected in the control power circuit, and this control power circuit utilizes user's electrical source of power to form elevator control power supply.And in general, elevator setting has the circuit network that is independent of such control usefulness and the safety circuit that has formed the determined safety circuit net of specification important item.The safety circuit net of this safety circuit is supplied with the safety circuit power supply of direct current or interchange by above-mentioned control power circuit.The safety circuit net of this safety circuit is by being connected in series of a plurality of safety verification switches of machinery system, constitute with the series circuit of safety circuit relay.The safety verification switch comprises the door switch of ladder riding hall, the door switch of car, the maintenance switch of safeguarding usefulness, adjuster hypervelocity monitoring switch etc.The safety circuit relay is switched on by elevator control circuit.When this safety circuit relay was switched on, if above-mentioned safety verification switch all is in normally (energising) state, then elevator just can start.
In addition, in the safety circuit of elevator, the protection during with circuit abnormality is a purpose, between above-mentioned safety circuit net and the above-mentioned control power circuit as the supply source of safety circuit net, has connected and composed fuse or circuit brake.
In the safety circuit of such elevator, above-mentioned safety circuit net constitutes whole safety verification switches that are connected in series without interruption.Therefore, if for example the lifting travel of elevator is elongated, then can draw the length of hundred meters to thousands of meters of winding numbers.Therefore, wiring impedance can increase, and in addition because the increase of the number of contacts of safety verification switches set, the impedance meeting of safety circuit increases.Because such impedance increases, even in safety circuit net end portion earth fault has taken place, owing to become low current, the electric current that only makes above-mentioned fuse or circuit brake carry out open working does not sometimes flow.
Take place for fear of such problem, adopt raising safety circuit power source voltage or many cloth cable wire that are connected in parallel to reduce the such countermeasure of wiring impedance in the past.But such countermeasure has caused that the increase, cost of circuit loss increase, the safety circuit structure complicated.
Summary of the invention
The objective of the invention is to, provide a kind of and do not rely on the circuit resistance value of safety circuit net and can detect the safety circuit of elevator of the grounding phenomenon of safety circuit net, the circuit resistance value of described safety circuit net is by every kind of building specification that elevator is set and difference.
According to the embodiment of the present invention, the safety circuit of elevator has safety circuit net and ground connection detection unit.The safety circuit net is made of being connected in series of safety verification switch, and the circuit network and being connected to that is independent of the control usefulness of elevator utilizes user's electrical source of power to form the control power circuit of elevator control power supply.The ground connection detection unit, based on from above-mentioned control power circuit to the past road electric current of above-mentioned safety circuit net and return the road electric current, judge whether ground connection of above-mentioned safety circuit net.
Description of drawings
Fig. 1 is the structure chart of the safety circuit of the related elevator of first execution mode.
Fig. 2 is the structure chart of the safety circuit of the related elevator of second execution mode.
Fig. 3 is the figure of the workflow of the related elevator control microcomputer of expression second execution mode.
Fig. 4 is the structure chart of the safety circuit of the related elevator of the 3rd execution mode.
Fig. 5 is the structure chart of the safety circuit of the related elevator of the 4th execution mode.
Embodiment
Followingly execution mode is described with reference to accompanying drawing.
At first, first execution mode is described.The driving control system of elevator as shown in Figure 1, comprising: three phase network power supply 1, electromagnetic contactor 2, transducer 3, smmothing capacitor 4, inverter 5, motor 6, power circuit 7 and elevator control circuit 8.In addition, the safety circuit of the related elevator of present embodiment comprises: circuit brake 9, elevator safety circuit net 10, safety circuit relay 10A, current detector 11A, 11B, current monitoring circuit 12 and safety circuit disconnect with relay tip 13.In addition, above-mentioned current monitoring circuit 12 comprises that absolute value differences detects handling part 12A and abnormality juding handling part 12B.
Three phase network power supply 1 is user's electrical source of power.This three phase network power supply 1 applies three-phase alternating current by 2 pairs of transducers 3 of electromagnetic contactor.3 pairs of three-phase alternating currents of transducer carry out rectification.This transducer 3 can be to have made up the diode transducer that a plurality of diodes form.Perhaps also can be to have made up the high efficiency transistor converter that a plurality of diodes and the transistorized body that is connected in parallel form.Smmothing capacitor 4 makes level and smooth and make it become direct voltage by the commutating voltage after transducer 3 rectifications.Inverter 5 utilizes this direct voltage to generate to be controlled to be and drives the required frequency of motor that elevator drive uses 6 and the alternating voltage of voltage, and is supplied in motor 6.Power circuit 7 is for the alternating voltage that is used to the three-phase (perhaps single-phase) from three phase network power supply 1 generates the control power circuit that elevator is controlled power supply.This power circuit 7 utilizes above-mentioned alternating voltage to generate direct voltage, and this direct voltage is supplied with to the safety circuit of the related elevator of the elevator control circuit 8 of the control of carrying out elevator and present embodiment.
The absolute value differences of current monitoring circuit 12 detects handling part 12A, detects the absolute value differences of the current detection value of above-mentioned current detector 11A, 11B.Abnormality juding handling part 12B based on detecting the absolute value differences detected value that handling part 12A draws by above-mentioned absolute value differences, carries out the unusual judgement of elevator safety circuit net 10.That is, when absolute value differences detected value during more than or equal to predetermined threshold value, abnormality juding handling part 12B is judged to be elevator safety circuit net 10 ground connection.
Like this, elevator become with lift driving and controlling system independently to the structure of elevator safety circuit net 10 supply powers.
In the elevator of above-mentioned such structure, by elevator control circuit 8 safety circuit relay 10A is connected, if this moment, elevator safety circuit net 10 safety verification switch all was in normally (closure) state, then elevator can start.When elevator starter, electromagnetic contactor 2 closures, 5 pairs of motor of inverter 6 are supplied with the alternating voltage of variable voltage variable frequency.
Like this elevator started during, in the safety circuit of elevator, current detector 11A detects past the road electric current flow to elevator safety circuit net 10, current detector 11B detection is returned the road electric current from elevator safety circuit net 10.By the detected past road electric current of these current detectors 11A, 11B with return the road electric current, the absolute value differences that is imported into current monitoring circuit 12 detects handling part 12A, detects the absolute value differences of these current detection values.Then, in abnormality juding handling part 12B,, judge whether ground connection has taken place in the somewhere of elevator safety circuit net 10 by comparing by this absolute value differences detection resulting absolute value differences detected value of handling part 12A and predetermined threshold value.
Here, abnormality juding handling part 12B if detect the absolute value differences detected value more than or equal to predetermined threshold value, then is judged to be elevator safety circuit net 10 ground connection, safety circuit is disconnected open control with relay tip 13.Thus, elevator safety circuit net 10 is disconnected from power circuit 7.Like this, when ground connection is taken place,, elevator is stopped by disconnecting elevator safety circuit net 10.
Like this, constitute when being judged to be elevator safety circuit net 10 ground connection, disconnect by safety circuit and use relay tip 13 that elevator safety circuit net 10 is disconnected from power circuit 7.Can replace or on this basis, by from abnormality juding handling part 12B to elevator control circuit 8 output abnormality decision signals, 8 pairs of safety circuit relays of elevator control circuit 10A disconnects control thus.
As mentioned above, the safety circuit of the elevator that this first execution mode is related has: elevator safety circuit net 10, it is made of being connected in series of safety verification switch, be independent of elevator control usefulness circuit network and be connected to utilization forms elevator control power supply as the three phase network power supply 1 of user's electrical source of power power circuit 7; With current monitoring circuit 12, its based on from above-mentioned power circuit 7 to the past road of above-mentioned elevator safety circuit net 10 electric current and return the road electric current, judge whether ground connection of above-mentioned elevator safety circuit net 10.By being made as such structure; elongated at lifting travel and the length of arrangement wire of elevator safety circuit net 10 and the number of contacts of safety verification switches set have increased under the situation, also can not relying on the circuit protection is that the abnormality detection that the disconnection open nature of the fuse of purpose setting and/or circuit brake 9 carries out elevator safety circuit net 10 is a ground connection judgement.Therefore, even under the elongated situation of lifting travel, also there is no need to make the safety circuit voltage high-pressure trend or increase the cloth number of lines.Consequently, can provide a kind of reduction that realizes circuit loss, and can be suppressed to Min., improve adaptability, have the safety circuit of the elevator of high reliability consuming electric power to various building specifications.
In addition, only by past road electric current between power circuit 7 and the elevator safety circuit net 10 and absolute value differences and the predetermined threshold value of returning the road electric current are compared, just can carry out the abnormality detection of the ground connection etc. of elevator safety circuit net 10.
And, according to this elevator safety circuit net 10 toward the road, the difference of returning the road electric current is judged to be and takes place under the unusual situation of ground connection, open safety circuit disconnects with relay tip 13 and disconnects elevator safety circuit net 10, so elevator is stopped.
Next, second execution mode is described.In Fig. 2, to the structure mark same Reference numeral same with above-mentioned first execution mode, the repetitive description thereof will be omitted.
In the present embodiment, in the structure of above-mentioned first execution mode, in current monitoring circuit 12, also be provided with elevator control microcomputer 12C.In abnormality juding handling part 12B, when detect by absolute value differences the resulting absolute value differences detected value of handling part 12A more than or equal to predetermined threshold value, detect when ground connection having been taken place in the somewhere of elevator safety circuit net 10, this elevator control microcomputer 12C control safety circuit disconnects the opening with relay tip 13.
Particularly, elevator control microcomputer 12C implements work shown in Figure 3.This work can repeat to implement always, also can be only elevator started during implement.That is, can when arriving at floor and do not move, not carry out in elevator this work yet.
With respect to this, under the situation of having imported anomaly detection signal, elevator control microcomputer 12C judges that elevator is current and whether is in (step S2) in service.If elevator is in service, then stop in order to wait for elevator to arrive at floor, repeat the processing of this step S2.At this moment, preferred, elevator control circuit 8 is indicated, make elevator arrive at nearest floor.
So, be not in servicely if in above-mentioned steps S2, be not judged to be elevator, then elevator control microcomputer 12C disconnects safety circuit and opens control with relay tip 13, thus disconnection applies (step S3) to the power supply of elevator safety circuit net 10.
As mentioned above, the safety circuit of the elevator of this second execution mode also possesses the elevator control microcomputer 12C that disconnects the control part of using relay tip 13 as the control safety circuit.And, elevator control microcomputer 12C, result according to the ground connection judgement that draws by abnormality juding handling part 12B, whether differentiate elevator is in service, if elevator is in service, wait for that then elevator arrives at floor, control and make safety circuit disconnect to carry out disconnection work with relay tip 13.By carrying out such control, under the situation that elevator safety circuit net 10 ground connection have been taken place, can after stopping, elevator carry out the power supply of elevator safety circuit net 10 is disconnected at least.
In the rules of EN standard and GB standard etc., stipulated " driving machine is stopped or after initial normal operation stops, not restarting driving machine ".In addition, stipulated ", must carry out hand-reset " for normal operation.Therefore, according to present embodiment, can provide the also safety circuit of the elevator of conformance with standard rules.
Here, used safety circuit to disconnect with relay tip 13, but can replace or on this basis, by from elevator control microcomputer 12C to elevator control circuit 8 output abnormality decision signals, 8 pairs of safety circuit relays of elevator control circuit 10A disconnects control thus.
And, also can replace independently being provided with elevator control microcomputer 12C, and this function is assembled in the elevator control circuit 8.
Next, the 3rd execution mode is described.In Fig. 4, to the structure mark same Reference numeral same with above-mentioned second execution mode, the repetitive description thereof will be omitted.
In the present embodiment, in the structure of above-mentioned second execution mode, in current monitoring circuit 12, also be provided with the abnormality juding threshold value and adjust handling part 12D.This threshold value is adjusted handling part 12D, set in order to carry out that ground connection among the abnormality juding handling part 12B is judged and with detect the above-mentioned predetermined threshold value that the resulting absolute value differences detected value of handling part 12A compares by above-mentioned absolute value differences.
Present embodiment is adjusted handling part 12D owing to also possess such threshold value, thereby can be set and the circuit impedance of the elevator safety circuit net 10 different by the lifting travel of elevator, the threshold value that circuital current is complementary.Therefore, can further improve the safety circuit of the high elevator of reliability.
In the structure of above-mentioned first execution mode, adjust handling part 12D even in current monitoring circuit 12, also be provided with the abnormality juding threshold value, also can obtain same effect, this point is from illustrating.
Next, the 4th execution mode is described.In Fig. 5, the same Reference numeral of structure mark to same with above-mentioned first execution mode omits repeat specification.
In the present embodiment, replace current detector 11A, 11B in the structure of above-mentioned first execution mode, possess zero phase sequence currenttransformer 14.The unbalanced component electric current that this zero phase sequence currenttransformer 14 detects the past road electric current of elevator safety circuit net 10 and returns the road electric current.Therefore, in current monitoring circuit 12, do not need absolute value differences to detect handling part 12A.Current monitoring circuit 12 is as long as only possesses abnormality juding handling part 12B, and this abnormality juding handling part 12B is being judged to be elevator safety circuit net 10 ground connection during more than or equal to predetermined threshold value by zero phase sequence currenttransformer 14 detected unbalanced component current values.
As mentioned above, the safety circuit of the elevator that this 4th execution mode is related has: elevator safety circuit net 10, it is made of with being connected in series of switch safety verification, be independent of elevator control usefulness circuit network and be connected to utilization forms elevator control power supply as the three phase network power supply 1 of user's electrical source of power power circuit 7; With current monitoring circuit 12, its based on from above-mentioned power circuit 7 to the past road of above-mentioned elevator safety circuit net 10 electric current with return the unbalanced component electric current of road electric current, judge whether ground connection of above-mentioned elevator safety circuit net 10.By being made as such structure; elongated at lifting travel and the length of arrangement wire of elevator safety circuit net 10 and the number of contacts of safety verification switches set have increased under the situation, also can not relying on the circuit protection is that the abnormality detection that the disconnection open nature of the fuse of purpose setting and/or circuit brake 9 carries out elevator safety circuit net 10 is a ground connection judgement.Therefore, even under the elongated situation of lifting travel, also there is no need to make the safety circuit voltage high-pressure trend or increase the cloth number of lines.Consequently, can provide a kind of reduction that realizes circuit loss, and can be suppressed to Min., improve adaptability, have the safety circuit of the elevator of high reliability consuming electric power to various building standards.
In addition, only by past road electric current between power circuit 7 and the elevator safety circuit net 10 and unbalanced component electric current and the predetermined threshold value of returning the road electric current are compared, just can carry out the abnormality detection of the ground connection etc. of elevator safety circuit net 10.
And, being judged to be under the unusual situation of ground connection by this elevator safety circuit net 10 toward road electric current and the unbalanced component electric current that returns the road electric current, open safety circuit disconnects and disconnects elevator safety circuit net 10 with relay tip 13, so elevator is stopped.
Even in the above-mentioned second and the 3rd execution mode, equally also can constitute and replace current detector 11A, 11B and use zero phase sequence currenttransformer 14, this point is from illustrating.
More than, several embodiments has been described, but these execution modes are enumerated the intention of unqualified scope of invention as an example.The execution mode that these are new can be implemented in other various modes, can carry out various omissions, displacement, change in the scope of the main idea that does not break away from invention.These execution modes and distortion thereof are contained in scope of invention or main idea, and are contained in invention that claim puts down in writing and the equal scope thereof.
Claims (6)
1. the safety circuit of an elevator is characterized in that, has:
The safety circuit net, it is made of being connected in series of safety verification switch, be independent of elevator control usefulness circuit network and be connected to the control power circuit, this control power circuit utilizes user's electrical source of power to form elevator control power supply; With
The ground connection detection unit, its based on from described control power circuit to the past road electric current of described safety circuit net and return the road electric current, judge whether ground connection of described safety circuit net.
2. the safety circuit of elevator according to claim 1 is characterized in that,
Described ground connection detection unit has:
Current detector, it detects from described control power circuit to the past road electric current of described safety circuit net and return the road electric current;
Difference detects handling part, and it detects by described current detector detected toward road electric current and the absolute value differences of returning the road electric current; With
The abnormality juding handling part when it detects the detected absolute value differences of handling part more than or equal to predetermined threshold value in described difference, is judged to be described safety circuit net ground connection.
3. the safety circuit of elevator according to claim 1 is characterized in that,
Described ground connection detection unit has:
Zero phase sequence currenttransformer, it detects from described control power circuit to the past road of described safety circuit net electric current and the unbalanced component electric current that returns the road electric current; With
The abnormality juding handling part, it during more than or equal to predetermined threshold value, is judged to be described safety circuit net ground connection at the detected unbalanced component electric current of described zero phase sequence currenttransformer.
4. according to the safety circuit of claim 2 or 3 described elevators, it is characterized in that,
Also have disconnection portion, this disconnection portion is arranged between described control power circuit and the described safety circuit net, described safety circuit net is disconnected from described control power circuit,
Described disconnection portion according to the result that the ground connection that is obtained by described abnormality juding handling part is judged, carries out the disconnection work that described safety circuit net is disconnected from described control power circuit.
5. the safety circuit of elevator according to claim 4 is characterized in that,
The control part that also possesses the described disconnection of control portion,
Whether described control part according to the result that the ground connection that obtained by described abnormality juding handling part is judged, is differentiated elevator and is in servicely, if elevator is in and in servicely waits for that then elevator arrives at floor, controls and makes described disconnection portion carry out described disconnection work.
6. the safety circuit of elevator according to claim 5 is characterized in that,
Described ground connection detection unit also possesses the threshold value of adjusting described threshold value and adjusts handling part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP218072/2009 | 2009-09-18 | ||
| JP2009218072A JP2011063431A (en) | 2009-09-18 | 2009-09-18 | Safety circuit for elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102025133A true CN102025133A (en) | 2011-04-20 |
Family
ID=43866127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102663129A Pending CN102025133A (en) | 2009-09-18 | 2010-08-27 | Safety circuit of elevator |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2011063431A (en) |
| CN (1) | CN102025133A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674096A (en) * | 2012-05-25 | 2012-09-19 | 巨人通力电梯有限公司 | Control cabinet of household elevator without machine room |
| CN105813972A (en) * | 2013-12-09 | 2016-07-27 | 因温特奥股份公司 | Safety circuit for an elevator system |
| CN107879215A (en) * | 2017-10-31 | 2018-04-06 | 浙江升航电子科技有限公司 | A kind of band-type brake security monitoring circuit and method |
| CN110065403A (en) * | 2018-01-24 | 2019-07-30 | 保时捷股份公司 | Traction battery charging assembly |
| CN111115401A (en) * | 2018-10-31 | 2020-05-08 | 上海三菱电梯有限公司 | Additional elevator safety loop and elevator safety system |
| CN112327984A (en) * | 2020-10-16 | 2021-02-05 | 苏州汇川技术有限公司 | Safety loop voltage regulating circuit |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI124423B (en) | 2012-11-05 | 2014-08-29 | Kone Corp | Elevator system which includes a security arrangement for monitoring the electrical safety of an elevator |
| CN109052091B (en) * | 2018-09-11 | 2023-11-24 | 沈阳蓝光新一代技术有限公司 | Safety system triggering and resetting device applied to existing building additionally installed elevator |
| JP6992784B2 (en) * | 2019-04-16 | 2022-01-13 | フジテック株式会社 | Passenger conveyor |
| CN113682914B (en) * | 2021-07-23 | 2022-11-11 | 西尼机电（杭州）有限公司 | Elevator safety device for preventing runaway |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008081074A1 (en) * | 2007-01-03 | 2008-07-10 | Kone Corporation | Elevator safety device |
| CN201190059Y (en) * | 2007-10-31 | 2009-02-04 | 康力电梯股份有限公司 | Security control circuit for elevator control system |
| CN101492138A (en) * | 2009-03-12 | 2009-07-29 | 石家庄五龙制动器有限公司 | Control circuit and control method of elevator braking system |
| US20090218176A1 (en) * | 2006-12-08 | 2009-09-03 | Tapio Tyni | Condition monitoring method |
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2009
- 2009-09-18 JP JP2009218072A patent/JP2011063431A/en not_active Withdrawn
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- 2010-08-27 CN CN2010102663129A patent/CN102025133A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090218176A1 (en) * | 2006-12-08 | 2009-09-03 | Tapio Tyni | Condition monitoring method |
| WO2008081074A1 (en) * | 2007-01-03 | 2008-07-10 | Kone Corporation | Elevator safety device |
| CN201190059Y (en) * | 2007-10-31 | 2009-02-04 | 康力电梯股份有限公司 | Security control circuit for elevator control system |
| CN101492138A (en) * | 2009-03-12 | 2009-07-29 | 石家庄五龙制动器有限公司 | Control circuit and control method of elevator braking system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674096A (en) * | 2012-05-25 | 2012-09-19 | 巨人通力电梯有限公司 | Control cabinet of household elevator without machine room |
| CN105813972A (en) * | 2013-12-09 | 2016-07-27 | 因温特奥股份公司 | Safety circuit for an elevator system |
| CN105813972B (en) * | 2013-12-09 | 2017-11-24 | 因温特奥股份公司 | Safety circuit for lift facility |
| CN107879215A (en) * | 2017-10-31 | 2018-04-06 | 浙江升航电子科技有限公司 | A kind of band-type brake security monitoring circuit and method |
| CN110065403A (en) * | 2018-01-24 | 2019-07-30 | 保时捷股份公司 | Traction battery charging assembly |
| CN111115401A (en) * | 2018-10-31 | 2020-05-08 | 上海三菱电梯有限公司 | Additional elevator safety loop and elevator safety system |
| CN111115401B (en) * | 2018-10-31 | 2021-05-25 | 上海三菱电梯有限公司 | Additional elevator safety loop and elevator safety system |
| CN112327984A (en) * | 2020-10-16 | 2021-02-05 | 苏州汇川技术有限公司 | Safety loop voltage regulating circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2011063431A (en) | 2011-03-31 |
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Application publication date: 20110420 |