CN2185255Y

CN2185255Y - AC double-speed elevator controller

Info

Publication number: CN2185255Y
Application number: CN 93240192
Authority: CN
Inventors: 师卫华
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-27
Filing date: 1993-09-27
Publication date: 1994-12-14
Anticipated expiration: 2003-09-27

Abstract

The utility model belongs to an elevator controller which is composed of a speed detector which is coaxially connected with a motor machine for dragging an elevator and is electrically connected with a central processing unit, and the central processing unit connected with the motor and a sensor electric signal arranged on a well. The leveling error of the controller is equal to zero on a theory, therefore, the leveling accuracy is high, the utility model can ensure that the elevator is braked in a contracting brake mode when speed is close to zero speed, and the comfort for riding the elevator can be clearly improved.

Description

AC double-speed elevator controller

The utility model belongs to elevator control gear, and is especially relevant with the AC double-speed elevator control setup.

Elevator is a kind of transportation device of vertical operation, has characteristics simple in structure, that cost is low based on AC double-speed elevator, so its consumption accounts for the first place of alternating-current electrical lift.But this elevator is compared with the variable voltage control alternating-current electrical lift with the frequency control alternating-current electrical lift, its ride comfort sense and leveling accuracy are relatively poor, be formulated at present in the various control system on this class elevator, the most frequently used is to adopt relay logic control to add simulation floor selector system; Adopt the control system of microcomputer or programmable controller in addition, it is to adopt distance to carry out throw-over and outage control for principle, when elevator moves to a certain specified point, promptly begins throw-over and outage.The weak point of this two classes control setup is because the throw-over of elevator and outage point are pre-determined by a certain charge capacity when elevator is installed, can not be adjusted accordingly throw-over and outage point with the different elevator speeds that cause because of load variations, must cause different elevator speeds to produce different level positions, be difficult to guarantee leveling accuracy, brake when also being difficult to be implemented in elevator outage back, reach the purpose of improving ride comfort near zero-speed.In order to reach the purpose of ride comfort, leveling accuracy, theoretically, for different elevator speeds, the throw-over of elevator and power-off time should be different, and the point of elevator outage in other words to the coasting distance of level position should be done respective change with the running velocity of elevator.Be elevator speed when high, power-off time early, coasting distance is long; When elevator speed was hanged down, power-off time evening, coasting distance was short.According to this theory, having developed a kind of Velocity-time that adopts is the control setup that the charge-discharge circuit of the resistance-capacitance of principle is controlled, it is the flat bed that utilizes the height control elevator of voltage on capacitor, the weak point of this class control setup is owing to do not have speed detector and programmable device, therefore system response speed is slow, to the poor sensitivity of less load variations.

The purpose of this utility model provide a kind of can at different loads, different elevator speeds select corresponding best throw-over and the outage point, can guarantee that elevator outage back is near the zero-speed band-type brake, can improve ride comfort sense, the speed of response that improves system and elevator sensitivity, thereby improve the AC double-speed elevator control setup of leveling accuracy load variations.

The utility model design-calculated interchange degree double-speed elevator control setup is made up of speed detector and central process unit.Speed detector is connected with the electromechanics that drags elevator is coaxial, is electrically connected with central process unit again, can will be transferred to central process unit with the corresponding motor speed signal of elevator speed.Central process unit also is connected with motor that drags elevator and the sensor electrical signal that is installed on the hoistway.When elevator operated in a certain floor, the sensor of this layer promptly sent signal to central process unit, indicated the elevator position, after central process unit is received signal, judged promptly whether this layer needs to stop, and did not then continue operation if need not stop; The elevator speed signal is just read in parking from speed detector as needs, compare with the preset speed curve immediately and determine throw-over and outage point, instant motor to elevator sends instruction and carries out throw-over and outage, and sends the band-type brake instruction to drg after elevator arrives level position.

For simplification device, replace relay control, the design's control setup also comprises the classical control system that is electrically connected with central process unit, as interior choosing, outgoing call signal system, status system, read out instrument, braking instruction etc.

When elevator inside or outside had the people to exhale ladder, interior choosing, outgoing call signal system promptly sent signal to central process unit, and this signal is stored in the central process unit the inside, determined the operation procedure of elevator.Elevator is checked the status system signal at prestart, need, send signal by status system to central process unit, to determine whether elevator is in the safe operation state, sends signal by central process unit to read out instrument in the running process of elevator, show that the elevator service direction is the place floor position.

Fig. 1 is the structural representation of the utility model design-calculated control setup.

Fig. 2 is the control path schematic diagram of the utility model design-calculated control setup.

Fig. 3 is to use the elevator throw-over curve synoptic diagram of the design's control setup, and wherein abscissa is the time, and ordinate is a speed.

The central processing unit master board schematic diagram of the control setup that Fig. 4 is made up of coder and microcomputer.

Fig. 5 is the design's a job procedure block diagram.

The central processing unit master board schematic diagram of the control setup that Fig. 6 is made up of tachogenerator and microcomputer.

The central processing unit master board schematic diagram of the control setup that Fig. 7 is made up of coder and programmable controller.

The central processing unit master board schematic diagram of the device that Fig. 8 is made up of the controller that tachogenerator and programmable controller are formed.

Be further described below in conjunction with the embodiment and the advantage thereof of accompanying drawing AC double-speed elevator control setup of the present utility model.

Fig. 1 and Fig. 2 are the structural representation and the schematic circuits of the design's control setup.It is made up of speed detector S and central process unit U, speed detector S and motor M coaxial connection of machinery that drags elevator, be electrically connected with central process unit U again, and the sensors X 1, X2, the X3 that are installed in each layer in the hoistway also are electrically connected with central process unit U.The uplink and downlink sensor Y and the Z that are installed on the car can receive each layer sensors X 1, X2, X3 in the hoistway respectively ... signal.Central process unit U also is electrically connected with motor M.Sensor is generally electromagnetic sensor.Speed detector can adopt tachogenerator, also can be coder.Central process unit can be a microcomputer chip, also can be programmable controller.Speed detector S is mechanical coaxial the connection with the motor M that drags elevator, and the signal that is sent causes central process unit U by lead, with speed detector detected with the corresponding motor speed of elevator speed send signal to central process unit.Different loading conditions, the speed signal difference of elevator.(see figure 5) during the elevator operation, the signal that last line sensor Y on the car or following line sensor Z receive judges by central process unit U whether this layer need stop, and then continues operation as not stopping; If this layer needs to stop, then speed detector S reads in existing speed.Central process unit is behind the speed signal that the receiving and analyzing speed detector sends, because it has the programmable function and can give and put velocity curve, when receiving speed signal, just put velocity curve and compare with giving, can determine corresponding best throw-over and power-off time at different speed, do not needing to send throw-over and cut-offing instruction under the situation that motor input voltage and frequency are adjusted.For example, the existing speed of elevator is that V2(sees Fig. 3), then at b2 point throw-over, the outage of c2 point is in the brake of d point, and wherein a point is the time of receiving certain layer of sensors X signal in the hoistway.If elevator load alleviates, then elevator speed is increased to V1, and elevator in b1 point throw-over, the outage of c1 point, still can guarantee to brake at the d point after a point is received signal at this moment.When so just having accomplished that elevator speed is high power-off time early, coasting distance is long; In power-off time evening when elevator speed is low, coasting distance is short.Be elevator speed when high throw-over and flat bed early, the throw-over flat bed was later when elevator speed was low.Avoided existing AC double-speed elevator because of the load different phenomenon of level position simultaneously not.

This device simple in structure, automatic guidance work is convenient and reliable.The leveling error that uses the elevator of this device is zero in theory, also can guarantee to brake near the zero-speed band-type brake after the elevator outage, therefore both can reach and improve the ride comfort sense, improve the purpose of leveling accuracy, can keep the characteristics that AC double-speed elevator is simple in structure, cost is low again.

In order to replace relay control, simplification device, the design's control setup also comprise and central process unit bonded assembly classical control system, as interior choosing, outgoing call signal system NW, status system ZT, read out instrument D, braking instruction B etc.General newly-designed control setup all should adopt the device of this structure.

Speed detector can be a tachogenerator, also can be coder, and central process unit can be a microcomputer, can be programmable controller also, selects for use different speed detectors and central process unit can be combined into the control setup of four kinds of practicalities.

Fig. 4 is the speed detector coder, and central process unit adopts the central process unit master board schematic diagram in the control of microcomputer system.Coder is PROXMITYSWITCH input and output voltage DC12V/6V, maximum frequency 8KHZ.Circuit composition master board controlled and modified to microprocessor control system as core processing unit, by peripheries such as program store 1, data storage 2, data buffering 3, address driving 4, address latch 5, decoding device 6 and photoelectricity isolation 7, shaping pulses 8 by 16 digit microcomputer 15; Carry out data transmission, stores processor by control bus 9, data bus 10, address bus 11; Various elevator run signal are gathered by various input front end disposable plates, deliver to master control board after the processing, master board sends 13 pairs of elevator run signal of various signals according to programming control and controls, master control board is constantly sampled to elevator speed simultaneously, in real time the elevator run curve is optimized and closed loop adjustment, thereby reach the optimal comfort sense, and realization zero-speed band-type brake, accurate flat bed, fundamentally solved the dependence of elevator operation to motor characteristic, system can also be furnished with debugging interface and state demonstration are set, make the Installation and Debugging and the Maintenance and Repair of elevator convenient, flexible, because it is low that microcomputer itself has a cost, speed is fast, the big characteristics of data handling capacity make the speed of response of total system fast, highly sensitive to load variations, and flexibly, reliably, and have a very strong extended capability.16 is clock generator among the figure, and 17,18,19 is data buffering, and 20 is connection terminal.

Speed detector also can adopt tachogenerator, thereby forms the control setup of being made up of tachogenerator and microcomputer, and the schematic diagram of its central processing unit master control board is seen Fig. 6.Different with Fig. 4 is because tachogenerator provides is not digital signal, and therefore, the signal that is provided by tachogenerator needs could import microcomputer through voltage transmitter 31 and after the A/D32 conversion.Its job procedure is identical with Fig. 5 basically, and tachogenerator can adopt JCY268T magneto three-phase alternating current synchronous tachometer generator.61 is program store among the figure, 62 data memoryes, 63 data bufferings, 64 addresses drive, 65 address latches, 66 decoding devices, 69 control buss, 610 data buss, 611 address buss, 612 various elevator run signal, the 613rd, the various signals that master board sends according to programming control, 614 signals that send by speed measuring motor, 31 is voltage transmitter, the 32A/D conversion, and 615 is CPU, 617,618,619 is data buffering, 620 connection terminals.

With there is something special, central process unit can also adopt programmable controller according to concrete requirement.Form as available OMRON C40P main frame and C169 expanding element.Select for use different speed detectors can form the control setup of forming by coder and programmable controller respectively, reach the control setup of forming by tachogenerator and programmable controller.Programmable controller in the control setup (see figure 7) of forming with coder is made up of power panel 28, CPU board 31, high-speed counting plate 29 and several input/output boards 30, the impulse singla that is equivalent to speed of coder 25 is input to high-speed counting plate 29, by input/output board input outward sign, status signal and output control signal and display drive signals.Programmable controller in the control setup (see figure 8) of forming with tachogenerator is made up of power panel 21, CPU board 22, analog quantity tablet 23 and several input/output boards 24, and the signal 26 that is provided by tachogenerator is connected with analog quantity tablet 23 behind voltage transmitter 27.By input/output board input outward sign, status signal and output control signal and display drive signals.(see figure 8).

More than these several control device all have ride comfort, advantage that leveling accuracy is high.

Claims

1, a kind of AC double-speed elevator control setup, it is characterized in that it is made up of speed detector and central process unit, said speed detector is connected with the electromechanics that drags elevator is coaxial, be electrically connected with central process unit again, said central process unit also is connected with motor that drags elevator and the sensor electrical signal that is installed on the hoistway.

2,, it is characterized in that said control setup also comprises the classical control system that is electrically connected with central process unit, as interior choosing, outgoing call signal system, status system, read out instrument, braking instruction etc. according to the said AC double-speed elevator control setup of claim 1.

3, according to claim 1 or 2 said AC double-speed elevator control setups, it is characterized in that said speed detector is a coder.

4, according to claim 1 or 2 said AC double-speed elevator control setups, it is characterized in that said speed detector is a tachogenerator.

5,, it is characterized in that said central process unit is a kind of in microcomputer and the programmable controller according to the said AC double-speed elevator control setup of claim 3.

6,, it is characterized in that said central process unit is a kind of in microcomputer and the programmable controller according to the said AC double-speed elevator control setup of claim 4.