CN101298304B - Elevator control device - Google Patents
Elevator control device Download PDFInfo
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- CN101298304B CN101298304B CN2008101006635A CN200810100663A CN101298304B CN 101298304 B CN101298304 B CN 101298304B CN 2008101006635 A CN2008101006635 A CN 2008101006635A CN 200810100663 A CN200810100663 A CN 200810100663A CN 101298304 B CN101298304 B CN 101298304B
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Abstract
To provide an elevator control device capable of preventing shut-off of the power supply system by switching the operation to one for reducing the current running in the power supply system. An elevator to be operated by changing the speed when the elevator is run at a constant speed and the acceleration/deceleration when the elevator is accelerated/decelerated according to the weight loaded in a car 9 comprises a current detection means 3 to detect the current running in the power source to supply power to an elevator system, and a deceleration command means 14 to reduce the speed or the acceleration/deceleration of the elevator when the current detected by the current detection means exceeds a predetermined value.
Description
Patent application of the present invention be that July 28, application number in 2004 are 200410055740.1 the applying date, name is called the dividing an application of application for a patent for invention of " elevator control gear ".
Technical field
The elevator control gear of the acceleration-deceleration when speed when the present invention relates to change constant-speed operation and acceleration and deceleration operation.
Background technology
In elevator control gear in the past, according to the load that load capacity determined in the car (hereinafter referred to as " car load "), in the drive range of the electrical equipment of electrical motor and driving motor, acceleration-deceleration when speed when changing constant-speed operation and acceleration and deceleration operation, by trying hard to make full use of the surplus energy of electrical motor like this, improve the service requirement of elevator.This elevator control gear has a kind of device, this device is to utilize weighting apparatus to wait to detect car load, according to described car load, speed when acceleration-deceleration when changing the acceleration and deceleration operation in the drive range of electrical motor and constant-speed operation carries out arriving with the shortest time computing (reference example such as patent documentation 1) of the velocity mode of purpose floor.
[patent documentation 1] Japanese Patent spy open the 2003-238037 communique (claim 3-8, Figure 10)
In elevator control gear in the past, be that driving boundary with the electrical equipment of electrical motor and driving motor is as limiting condition, according to car load, to arrive with the shortest time purpose floor such take car when the constant-speed operation speed and the acceleration-deceleration during the acceleration and deceleration operation set.This mode is a load capacity in car during less than the maximum bearing capacity that can carry, and makes full use of the surplus energy of electrical motor and electrical equipment, regulates the speed and acceleration-deceleration.Usually, though be the adjustment of in the scope that is no more than motor capacity and electrical equipment capacity, carrying out car speed and acceleration-deceleration, but owing to be to regulate the speed and acceleration-deceleration according to the detection of car load, when therefore in the detected value of thereby car load former, producing error because of certain, owing to be to come speed and acceleration-deceleration are set according to the detected value that contains error, when therefore electrical motor or power-supply system are even without surplus sometimes, also be set at high speed and acceleration-deceleration, under the situation that the result has, because of making power-supply system, excess current cuts off, or the heating increase of equipment such as electrical motor etc., produce the situation that service requirement reduces.
The present invention proposes in order to solve relevant issues just, its purpose is to provide a kind of elevator control gear, this elevator control gear detects the elevator current value that flows through power-supply system in service, according to this current value, speed when acceleration-deceleration when adjusting elevator acceleration and deceleration operation and constant-speed operation, even by in the detected value of car load, there being lift appliances such as error to sink under the situation of overload like this, also can detect this state, and and then switch to the operation scheme that the electric current that flows through power-supply system is reduced, cut off by preventing power-supply system like this.
Summary of the invention
At the relevant elevator control gear of the present invention, acceleration-deceleration during the speed when changing the elevator constant-speed operation and acceleration and deceleration operation, carry out the elevator operation according to the load capacity in the car, comprise the current sensing means that detects the electric current that flows through in the power supply of supplying with elevator device and when the current detection value that utilizes described current sensing means to detect surpasses specified value, be judged as the over burdening state of elevator device, and make the speed of elevator or the deceleration instruction device that acceleration-deceleration reduces.
The present invention can obtain a kind of elevator control gear, this elevator control gear is according to the detected value that flows through the current value of power-supply system, speed when electric deceleration/decel when adjusting elevator acceleration and deceleration operation and constant-speed operation, even flow through under the situation of excessive electric current by in the detected value of car, having like this in the power-supply system such as error, also can detect this state, and and then switch to the operation scheme that the electric current that flows through power-supply system is reduced, cut off by preventing power-supply system like this.Its result can be suppressed to bottom line with the reduction of service requirement.
Description of drawings
Figure 1 shows that system's pie graph of the elevator control gear of the invention process form 1.
Fig. 2 is the diagram of circuit of the action usefulness of the elevator control gear of explanation the invention process form 1.
Fig. 3 is the characteristic map of the action usefulness of the elevator control gear of explanation the invention process form 1.
Figure 4 shows that the invention process form 1 elevator control gear flow to the characteristic map of the input current waveform of diode rectifier from alternating current.
[label declaration]
1 source of AC
2 power cut-off devices
3 current probes
4 rectifiers
5 inverters
6 electrical motors
7 speed detectors
8 traction sheaves
9 cars
10 counterweights
11 car load detecting devices
12 velocity mode generating apparatus
13 motor speed controlling devices
14 deceleration instruction devices
15 steel ropes
The specific embodiment
Example 1
Figure 1 shows that system's pie graph of the elevator control gear of the invention process form 1.
In Fig. 1, source of AC 1, power cut-off device 2, current probe 3, rectifier 4, inverter 5, electrical motor 6, speed detector 7, traction sheave 8, car 9, counterweight 10, car load detecting device 11, motor speed controlling device 13 and steel rope 15 are finished and were installed same action in the past.The invention is characterized in to have deceleration instruction device 14, in addition velocity mode generating apparatus 12 some the action also with installed in the past different.
Source of AC 1 is connected with rectifier 4 by power cut-off device 2.Power cut-off device 2 is fuse or circuit breaker, selects load current value according to the capacity of electrical motor 6 or inverter 5, surpasses rated current if flow into the electric current of rectifier 4, then for lock-out circuit with supply disconnecton.Rectifier 4 is transformed to direct current with source of AC 1, exports to inverter 5.Inverter 5 is driven by motor speed controlling device 13, makes electrical motor 6 rotations.Traction sheave 8 is connected with electrical motor 6, and traction sheave 8 is provided with car 9 and counterweight 10 by steel rope 15, makes their up-and-down movements.
Current probe 3 is current sensors etc., is to detect the current value detecting device that inputs to rectifier 4, and its detected value inputs to deceleration instruction device 14.
Car load detecting device 11 is the devices that detect the load capacity in the car 9, and detected value is sent to velocity mode generating apparatus 12.As car load detecting device 11 weighting apparatus etc. is arranged.In addition, also can utilize current value according to electrical motor 6 etc. to be scaled car load waits and tries to achieve.
Speed detector 7 is the devices that detect the rotating speed of electrical motor 6, utilizes coder to wait and realizes.In addition, the speed detected value is sent to motor speed controlling device 13.
Motor speed controlling device 13 carries out follow-up control, makes the rotating speed of electrical motor 6 consistent with the velocity mode that utilizes velocity mode generating apparatus 12 to generate.Aforementioned motor speed controlling device 13 is the devices that drive inverter 5, makes the detected value of speed detector 7 consistent with aforementioned velocity mode, refers to the control program of inverter etc. etc.
Velocity mode generating apparatus 12 is the devices of velocity mode that calculate to drive the electrical motor 6 of the car 9 of elevator or traction sheave 8, according to car load, the acceleration-deceleration when being created on speed when adjusting constant-speed operation in the drive range of equipment that electrical motor 6 grades constitute elevator and acceleration and deceleration operation also arrives the velocity mode of purpose floor with the shortest time.The method of calculating of velocity mode for example can adopt aforementioned patent document 1 described method etc.In addition, when utilizing aforementioned deceleration instruction device 14 to import deceleration instructions, export to motor speed controlling device 13, the speed when making speed become behind the change velocity mode less than this constant-speed operation of exporting constantly.
Below with flowchart text shown in Figure 2 action according to elevator control gear of the present invention.
At first, if the calling car takes place, then utilize car load detecting device 11 to detect car load, and be sent to velocity mode generating apparatus 12 at step S21.Then in step S22, speed when acceleration-deceleration when utilizing velocity mode generating apparatus 12 in the drive range of the equipment that constitutes elevator, to set the acceleration and deceleration operation and constant-speed operation according to the detected value of aforementioned car load, generation is exported to motor speed controlling device 13 with the velocity mode of shortest time arrival purpose floor.In step S23, release the brake comes driving motor 6 according to aforementioned velocity mode, and car 9 brings into operation.In step S24, utilize current probe 3 that operating current detection value ia is sent to deceleration instruction device 14.Deceleration instruction device 14 is current detection value ia and specified value Imax relatively, when ia＞Imax, are transferred to step S25.In step S25, the time of ia＞Imax is counted, continue specified time Δ t when above at it, be judged as overload state, and to velocity mode generating apparatus 12 output deceleration instructions.In step S26, according to deceleration instruction, the speed of velocity mode generating apparatus 12 during with constant-speed operation is reset to the little speed of moving than this moment of speed, by carrying out the deceleration of elevator operation like this.
Fig. 3 is the characteristic map of explanation according to the action usefulness of elevator control gear of the present invention.
The first half of Fig. 3 is represented the rotating speed of electrical motor 6, and the latter half represents to utilize the current detection value of current probe 3.Expression has the situation of the velocity mode of error because of the generations such as detection error of car load detecting device 11 in Fig. 3.At moment t1, current detection value ia surpasses the permissible value Imax of regulation.The time spy who surpasses the permissible value Imax of regulation at current detection value ia continues the moment t2 of specified time Δ t, by deceleration instruction device 14 deceleration instruction is sent to velocity mode generating apparatus 12, change velocity mode and also reduce speed now, speed omega 2 operations when making the constant operation of the speed omega 1 with less than this constantly constant-speed operation the time.Then, the stabilization of speed of electrical motor 6 is parked in the purpose floor in speed omega 2.In addition, after moment t2, the stabilization of speed of electrical motor 6 is when speed omega 2, and current detection value ia also becomes below the permissible value.
As mentioned above, in the present invention, utilize owing to excess current power cut-off device 2 with supply disconnecton before, by reducing the running velocity of car 9, can reduce from the electric current of power supply input, prevent supply disconnecton in advance.
In addition, at power supply is under the situation of three-phase alternating current, if carry out rectification with diode rectifier etc., then owing to only just have electric current to flow through when the voltage of container is less than power line voltage in filtering, therefore directly adopt the output of current probes 3 such as current sensor if keep intact, it is such then to become Fig. 4, is difficult to judge whether to be overcurrent condition.Figure 4 shows that the current waveform in each cycle of a phase.Thereby, by for example carrying out following such processing, whether be the judgement of overcurrent condition easily just.That is, detect the electric current of three-phase, according to the absolute value sum of these testing results as current detection value.Perhaps, make aforementioned absolute value sum by filters such as firstorder filters, with this value of passing through as current detection value.Perhaps, according to the maxim of the absolute value in the three-phase as current detection value.Perhaps, detect a phase, the value after filters such as firstorder filter are passed through is as current detection value.Perhaps, detect the electric current of a phase, try to achieve the aviation value of its specified time or the effective value of specified time, be used as current detection value by computing.
Under situation without diode rectifier etc., when the output result of current probe 3 is sinusoidal waveform, owing to can calculate effective value easily, therefore also can be according to effective value as current detection value.Perhaps, also can the permissible value Imax that stipulate be carried out peak value convert with peak value as detected value.
In addition, because the magnitude of current temporarily increases, therefore also can slow down in the acceleration and deceleration process according to the current detection value in the moment that becomes constant-speed operation.In this case, count, send deceleration instruction when during ia＞Imax, continuing Δ t from the moment t3 of Fig. 3.
In addition, in this example 1, be only when current detection value i a surpasses the elapsed time Δ t of state continuance regulation of permissible value Imax of regulation, to send deceleration instruction, but also can send deceleration instruction immediately once surpassing permissible value.
In addition, in this example 1, be that current probe 3 is arranged between source of AC 1 and the rectifier 4, but also can be arranged between rectifier 4 and the inverter 5, according to the received current Iinv (being assumed to be Iinv) that flows to inverter, the current value of power supply is flow through in reckoning, and according to this reckoning value, sends deceleration instruction.For example, when the input voltage that can detect inverter (being assumed to be Vinv), as a certain constant, then the current detection value ia that supplies with from power supply can calculate by following formula with Kinv.
ia＝Kinv×Vinv×Iinv
The present invention except weighting error, the friction of car and guide rail bigger etc. cause from the generation torque transfer of electrical motor be the conversion efficiency of car speed poor, be also will bring into play effect under the inefficient situation of hoist trunk.Under these circumstances, owing to flow through the more electric current that surpasses anticipation, therefore be absorbed in overcurrent condition easily, but utilize the present invention, because can the detection of excessive current state, therefore elevator control gear action and electric current is reduced can avoid such state.
In addition, other also will bring into play effect when making motor current owing to certain reason or surpassing the rated value of anticipation by the power that power supply is supplied with.
In this example 1, be that speed when reducing constant-speed operation reduces current value, but also can have the instruction that acceleration-deceleration is reduced in that acceleration and deceleration are in service,, reduce electric current by carry out the acceleration and deceleration operation with littler acceleration-deceleration.
In addition, when utilizing deceleration instruction to slow down, also can not be to decelerate to till the speed of predesignating, but continue to slow down reach current detection value for the permissible value of regulation following till, be controlled near the speed the permissible value.By like this,, therefore can will cause the reduction of service requirement to be suppressed at essential bottom line because of deceleration owing to stop to slow down at essential bottom line.In addition, under situations such as hoist trunk efficient is poor especially, reach the speed of predesignating, also might not reach below the permissible value by current value, but utilize the manner, can avoid such phenomenon even slow down.
In this example 1, when detecting excess current, be to run to the purpose floor after it is slowed down, but also can for example make its deceleration be parked in nearest floor.In addition, also can make processing such as it promptly stops.
Example 2
In this example 2, be characterised in that, adopt the reckoning value of the electric current of source of AC 1 supply to replace adopting the current detection value that produces by current probe 3.Reckoning is to carry out in motor speed controlling device 13, should the reckoning value export to deceleration instruction device 14, and deceleration instruction device 14 sends deceleration instruction according to aforementioned reckoning value.The action of other device and equipment is described identical with example 1.
Narrate this projectional technique below.
When the control alternating-current motor/AC motor, the general vector controlled that adopt more.At this moment, being added in voltage on the inverter 5 of driving motor 6 is decomposed into the d axle of flow direction and controls with the q direction of principal axis of its quadrature.At this moment, the approximate expression as follows of the power P of inverter 5 supplies.
P＝Vd×Id+Vq×Iq+HO
In the formula, Vd and Vq are respectively d axle and axial magnitude of voltage of q or voltage instruction value, and Id and Iq are respectively d axle and axial current value of q or current instruction value.In addition, HO is the amount that the loss that will cause because of hoist trunk efficient is scaled magnitude of power.Use above-mentioned power P, the reckoning value ia of electric current can calculate with following formula.
ia＝Kp×P
In the formula, COEFFICIENT K p is to be the coefficient of the current value supplied with of power supply from the power conversion that inverter 5 produces, and sets according to the conversion efficiency of inverter 5 and rectifier 4 and supply voltage value etc.In addition, be that voltage and current value that inverter is exported are transformed to d axle and q axle in above-mentioned example, but also can not carry out conversion, carry out the computing of magnitude of power with the interchange value.
In addition, because the torque that Iq and electrical motor produce is directly proportional, the therefore rotational speed omega of torque that produces according to the electrical motor of being obtained by Iq and the electrical motor that obtained by speed detector 7 also can as followsly be obtained the power P of inverter 5 supplies.
P＝Kr×Kq×Iq×ω+HO
In the formula, Kq is the coefficient that Iq is scaled the torque of electrical motor generation.In addition, Kr is to be the coefficient of magnitude of power with unit conversion.
In addition, also can utilize torque master (not shown) to detect the torque that electrical motor 6 produces.
In the present invention, owing to flow through the current value of power supply and do not need current probe 3, therefore can realize more cheap elevator control gear by reckoning.
Example 3
In this example 3, be that the number of times that utilizes deceleration instruction device 14 output deceleration instructions is counted, when it surpasses stipulated number, being judged as is error state, acceleration-deceleration when speed when termination is set constant-speed operation according to car load and acceleration and deceleration operation, the acceleration-deceleration when speed when all car load are set same constant-speed operation and acceleration and deceleration operation.Have again it is characterized in that, this be guarantee not can excess current example.Acceleration-deceleration when speed the when acceleration-deceleration when speed during aforementioned same constant-speed operation and acceleration and deceleration operation, also can excess current in the time of for example can being chosen in car load for maximum carrying not such constant-speed operation and acceleration and deceleration operation.Usually, why the electric current of being supplied with by power supply becomes excess current, is because the detection error of car load is set with the situations such as velocity mode of error greatly causes, so such situation is when often taking place, relatively reasonably judge it is that fault such as fault has taken place to weigh, or error state.Thereby, according to the present invention, can detect such error state, and then can overladen velocity mode by setting not, can not make equipment overloads such as electrical motor.In addition, also can adopt the ratio of output deceleration instruction to replace adopting the number of times of exporting deceleration instruction.
In addition, also can be when being judged as error state, the acceleration-deceleration value when speed in the time of will be according to the constant-speed operation of car load and acceleration and deceleration operation is reset to the little value of setting than up to now of value, carries out speed governing operation.Have again, the device of storing the value that resets also can be set, and after current, adopt the value of storage to move.In addition, in the time of also can using the value output deceleration instruction of aforementioned storage shortly, also further be reset to littler value, and this process of continuing till not exporting, aforementioned deceleration instruction is best velocity mode by such automatic compensation.
According to the present invention, can detect the fault etc. of weighing, and then the setting speed pattern make not can overload, by preventing elevator to be stopped or power-supply system is cut off like this, the reduction of service requirement can be suppressed to bottom line because of overload.
Claims (4)
1. elevator control gear, carries out the elevator operation at the acceleration-deceleration when speed when changing the elevator constant-speed operation according to the load capacity in the car and acceleration and deceleration operation, it is characterized in that, comprises
The current sensing means of the electric current that flows through in the power supply of detection supply elevator device,
Be arranged between described power supply and the elevator device power cut-off device and
When the current detection value that utilizes described current sensing means to detect surpasses specified value, be judged as the over burdening state of elevator device, and the speed of elevator or acceleration-deceleration are reduced to prevent that described power cut-off device from cutting off the deceleration instruction device of described power supply.
2. elevator control gear as claimed in claim 1 is characterized in that,
Detect weight in the car according to the current value of electrical motor.
3. elevator control gear as claimed in claim 1 or 2 is characterized in that,
The deceleration instruction device slows down, till current detection value is less than specified value.
4. elevator control gear as claimed in claim 1 or 2 is characterized in that,
Current sensing means is a device of calculating current value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-099147 | 2004-03-30 | ||
| JP2004099147A JP4397721B2 (en) | 2004-03-30 | 2004-03-30 | Elevator control device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100557401A Division CN100398426C (en) | 2004-03-30 | 2004-07-28 | Elevator control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101298304A CN101298304A (en) | 2008-11-05 |
| CN101298304B true CN101298304B (en) | 2010-09-08 |
Family
ID=35049225
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101006635A Active CN101298304B (en) | 2004-03-30 | 2004-07-28 | Elevator control device |
| CNB2004100557401A Active CN100398426C (en) | 2004-03-30 | 2004-07-28 | Elevator control device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100557401A Active CN100398426C (en) | 2004-03-30 | 2004-07-28 | Elevator control device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4397721B2 (en) |
| CN (2) | CN101298304B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100562475C (en) * | 2005-11-14 | 2009-11-25 | 三菱电机株式会社 | Elevator control gear |
| JP4949779B2 (en) * | 2006-08-31 | 2012-06-13 | 東芝エレベータ株式会社 | elevator |
| CN101085662B (en) * | 2007-06-21 | 2010-05-19 | 江苏三上机电制造股份有限公司 | Construction lifter excess load controller |
| JP2011057320A (en) * | 2009-09-07 | 2011-03-24 | Toshiba Elevator Co Ltd | Elevator |
| CN102482049B (en) * | 2009-09-09 | 2014-01-29 | 三菱电机株式会社 | Control device for elevator |
| JP2012240839A (en) * | 2011-05-24 | 2012-12-10 | Hitachi Building Systems Co Ltd | Adjusting method of load detector of elevator, and control system of elevator |
| JP5949743B2 (en) * | 2013-12-19 | 2016-07-13 | ダイキン工業株式会社 | Electric motor control device and electric motor control method |
| WO2016091199A1 (en) * | 2014-12-11 | 2016-06-16 | 冯春魁 | Method and system for acquiring, controlling, running and load monitoring elevator parameter |
| CN104973470B (en) * | 2015-06-19 | 2017-06-06 | 日立电梯(上海)有限公司 | The variable elevator of load capacity and its overload operation method |
| CN106429663A (en) * | 2016-09-23 | 2017-02-22 | 苏州汇川技术有限公司 | Variable-speed elevator running control system and method |
| WO2022003795A1 (en) * | 2020-06-29 | 2022-01-06 | 三菱電機株式会社 | Passenger conveyor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2579189B1 (en) * | 1985-03-25 | 1988-04-08 | Logilift Sarl | CONTROLLED CONTROL METHOD FOR THE SLOWDOWN OF A MOBILE AND REGULATED CONTROL DEVICE FOR IMPLEMENTING THE METHOD |
| CN1011688B (en) * | 1985-04-01 | 1991-02-20 | 三菱电机株式会社 | Speed control apparatus for elevator |
| FI86053C (en) * | 1989-10-31 | 1992-07-10 | Kone Oy | Method and apparatus for controlling a lifting motor |
| JP3251844B2 (en) * | 1996-03-29 | 2002-01-28 | 三菱電機株式会社 | Elevator control device |
-
2004
- 2004-03-30 JP JP2004099147A patent/JP4397721B2/en not_active Expired - Lifetime
- 2004-07-28 CN CN2008101006635A patent/CN101298304B/en active Active
- 2004-07-28 CN CNB2004100557401A patent/CN100398426C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN101298304A (en) | 2008-11-05 |
| JP4397721B2 (en) | 2010-01-13 |
| CN100398426C (en) | 2008-07-02 |
| JP2005280935A (en) | 2005-10-13 |
| CN1676455A (en) | 2005-10-05 |
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