CN101618827B

CN101618827B - Lift control device and control method thereof

Info

Publication number: CN101618827B
Application number: CN200810043585.XA
Authority: CN
Inventors: 刘玉兵
Original assignee: Shanghai Mitsubishi Elevator Co Ltd
Current assignee: Shanghai Mitsubishi Elevator Co Ltd
Priority date: 2008-07-01
Filing date: 2008-07-01
Publication date: 2014-02-05
Anticipated expiration: 2028-07-01
Also published as: CN101618827A

Abstract

The invention discloses a device for controlling operation of a lift and a method using the same. The device comprises a controller, a main loop capacitor, a rectifier, at least two sets of inversion components, a current transformer, a regenerative discharge resistor and a regenerative discharge IGBT, wherein the rectifier is connected with a power supply, and is used for rectifying and converting alternating current into direct current; at least two sets of the inversion components are connected in parallel with each other, are connected with the rectifier, and are connected with output channels of the controller; the current transformer detects the current of a traction motor, is connected with an input channel of the controller, and is used for determining the operation state of the motor; the regenerative discharge resistor and the regenerative discharge IGBT are used for consuming regenerative energy generated by the lift; and the lift control device drives more than two traction motors, and each traction motor drags a respective lift car to run up and down. The device and the method adopt a mode that a plurality of traction motors are driven by the single lift control device to drag the respective lift car to run up and down, not only can save energy, but also can further reduce the manufacturing cost of the lift.

Description

Elevator control gear and control method thereof

Technical field

The present invention relates to a kind of method of controlling the device of elevator operation and using this device.

Background technology

Traditional elevator systems as shown in Figure 1, an elevator control gear can only drive an elevator of control to move up and down, the pattern that all adopts single elevator control gear to drive separate unit traction motor to move up and down to drag lift car, traction motor regenerated energy consumes on regeneration discharging resistance.Example as shown in Figure 1 in the past elevator control gear be to form like this: drive traction motor to make traction sheave rotation, by lift car and the counterweight that makes like this steel rope two ends connect, move, the passenger in car is transported to the floor of appointment.The alternating current that rectifier is supplied with power supply carries out rectification, is transformed to direct current (DC), and electric energy is stored in major loop electric capacity.With inversion assembly, this direct current (DC) is transformed to again to the alternating current of variable voltage variable frequency.Controller determines the starting of elevator and stops, generate its position and speed command simultaneously, utilize the current feedback of current transformer generation and be arranged on the speed feedback that the coder on traction motor produces, drive traction motor rotation, realize position and the speed control of elevator.At this moment, controller just can be controlled the output voltage of inversion assembly and frequency.Due to the frequent variation of elevator passenger number, the running state of elevator also changes.When car deadweight adds that passenger weight is greater than the weight of counterweight, when elevator upwards travels at the uniform speed, elevator is in motoring condition; When contrary elevator travels at the uniform speed downwards, elevator is in reproduced state.In like manner, when car deadweight adds that passenger weight is less than the weight of counterweight, when elevator upwards travels at the uniform speed, elevator is in reproduced state, and when contrary elevator travels at the uniform speed downwards, elevator is in motoring condition.When elevator is during in motor-operated running state, elevator need to consume electric energy, and at this moment rectifier is that direct current (DC) is supplied with inversion assembly the AC rectification of power supply; When elevator is when regenerating running state, traction motor need to be electric energy the kinetic transformation of elevator, controller drives inversion assembly that the alternating current of traction motor is converted into direct current (DC), because rectifier can not be converted into alternating current direct current (DC), can only be by the discharge loop being formed by regeneration discharging resistance and regeneration discharge IGBT, power consumption, on regeneration discharging resistance, is converted into heat energy.This mode can not effectively be utilized the regenerated energy of elevator.

In order to save the energy, existing producer exploitation energy back device replaces the rectifier in elevator control gear, and the regenerated energy of elevator is fed back to electrical network.But which needs a set of inversion assembly to realize feedback and the utilization of regenerated energy, and cost is higher.In industrial control field ，Ye You producer, take the mode of multiple electric motors control setup common bus to save the energy.

summary of the invention

The object of this invention is to provide a kind of elevator control gear, it adopts single elevator control gear to drive many patterns that traction motor moves up and down with the lift car dragging separately, not only can save the energy, and more can reduce the manufacturing cost of elevator.

In order to solve above technical matters, the invention provides a kind of elevator control gear, comprising: a controller (7); A major loop electric capacity (3); A rectifier being connected with power supply (6) is direct current (DC) for alternating current being carried out to rectifying conversion; At least two cover inversion assembly parallel with one another and that be connected with rectifier (1) and inversion assemblies (2), described inversion assembly is connected with controller (7) delivery channel; At least two covers detect the current transformer (8,9,10,11) of traction motor electric current, and described current transformer is connected with the input channel of controller (7), for judging motor (12) and motor (13) running state; A regeneration discharging resistance (5) and a regeneration discharge IGBT (4), the regenerated energy producing for consuming elevator; Described elevator control gear 7 drives two above traction motors (12,13), and the car (20,21) that each traction motor drags respectively separately moves up and down; Described controller can calculate the needed power of each elevator; If the elevator of a motoring condition needs starting operation, and exist other elevator in reproduced state, output drive signal, controls the elevator starter operation of this reproduced state; If there are at least two elevators all to carry out motoring condition operation, and rectifier maximum power can not meet the power requirement of many elevator electrics operation, and output drive signal, reduces at least one elevator speed; If there are at least two elevators all to carry out reproduced state when operation, and the maximum power of regeneration discharging resistance and regeneration discharge IGBT can not meet the power requirement of many elevator regenerated operations, and output drive signal, reduces at least one elevator speed.

In elevator control gear of the present invention, owing to having increased necessary inversion assembly summation current transformer, an elevator control gear of the present invention can drive many elevators of control to move up and down.With respect to traditional elevator control gear, many cover inversion assemblies of the present invention link together by bus, can automatically utilize the regenerated energy of elevator to drive the electric operation of other elevator.In addition, the controller due to elevator control gear of the present invention can, by controlling the starting operation of many elevators, make the operating efficiency of many elevators optimum.

The present invention also provides a kind of control method of elevator control gear, comprises the following steps: controller calculates the needed power of each elevator; If the elevator of a motoring condition needs starting operation, and exist other elevator in reproduced state, controller output drive signal, controls the elevator starter operation of this reproduced state; If there are at least two elevators all to carry out motoring condition operation, and rectifier maximum power can not meet the power requirement of many elevator electrics operation, and controller output drive signal, reduces at least one elevator speed; If there are at least two elevators all to carry out reproduced state when operation, and the maximum power of regeneration discharging resistance and regeneration discharge IGBT can not meet the power requirement of many elevator regenerated operations, and controller output drive signal, reduces at least one elevator speed.

accompanying drawing explanation

Fig. 1 is the structured flowchart that traditional elevator control setup is controlled an elevator;

Fig. 2 is the structured flowchart that elevator control gear of the present invention is controlled two elevators.

the specific embodiment

Elevator control gear 22 of the present invention as shown in Figure 2, the device that it comprises has: inversion assembly 1,2, major loop electric capacity 3, regeneration electric discharge insulated gate bipolar translator power tube (Insulated Gate Bipolar Transistor is hereinafter to be referred as IGBT) 4, regeneration discharging resistance 5, rectifier 6, controller 7, the

current transformer

8,9,10,11 of detection traction motor electric current.Fig. 2 also comprises the necessary assembly of elevator device: traction motor 12,13, coder 14,15,

traction sheave

16,17,

counterweight

18,19, lift car 20,21.If inversion assembly 1,2 adopts the intelligent power module that includes regeneration discharge IGBT, can replace the discharge IGBT 4 of regenerating; Regeneration discharge IGBT is received on the corresponding terminal of inversion assembly 1,2.While controlling 2 above elevators, on the basis of elevator control gear as shown in Figure 2, only need to increase necessary inversion assembly summation current transformer.Elevator device increases the necessary devices such as traction motor, traction sheave, coder, counterweight and lift car again and just can adopt said method to realize the elevators more than simultaneously controlling two.Controller 7 is responsible for detecting the signal of coder 14,15, by

current transformer

8,9,10,11, measure traction motor electric current, produce elevator speed graphics command, carry out variable-frequency variable-voltage control algorithm, output pwm pulse signal drives traction motor operation to trigger the switch of inversion component power module.

Principal feature of the present invention is that a controller is controlled many cover inversion assemblies, and an elevator control gear drives many traction motors, and the car dragging separately moves up and down, and each car can move alone.

In the ordinary course of things, controller 7 can judge that by detecting the condition of loading of every lift car the main state of elevator is motoring condition or reproduced state after every elevator starting operation next time.If be carved with at a time the elevator of motoring condition, need starting operation, and the state that the elevator that simultaneously has reproduced state stops in standby, that controller 7 can be controlled these two elevators starting operation simultaneously, the regenerated energy that elevator in reproduced state operation is produced flows to the elevator in motoring condition operation, reduces the energy that elevator consumes electrical network.

When many elevators all carry out motoring condition operation, if the maximum power of rectifier 6 can not meet the power requirement of many elevator electric operations, controller 7 can take to reduce the pattern of one or more elevator speed, reduces the gross horsepower of many elevator electric operation consumption to meet the requirement of rectifier 6 maximum powers.

In like manner, when many elevators all carry out reproduced state operation, 4 conductings of regeneration discharge IGBT, by 5 electric discharges of regeneration discharging resistance; If the maximum power of regeneration discharging resistance 5 or regeneration discharge IGBT 4 can not meet the power requirement of many elevator regenerated operations, controller 7 can take to reduce the pattern of one or more elevator speed, reduces the gross horsepower of many elevator regenerated operations generations to meet the requirement of regeneration discharging resistance 5 and regeneration discharge IGBT 4 maximum powers.

Claims

1. an elevator control gear, comprising: a controller (7); A major loop electric capacity (3); A rectifier being connected with power supply (6) is direct current (DC) for alternating current being carried out to rectifying conversion; At least two cover inversion assemblies parallel with one another and that be connected with rectifier (1,2), described inversion assembly is connected with controller (7) delivery channel; At least two covers detect the current transformer (8,9,10,11) of traction motor electric current, and described current transformer is connected with the input channel of controller (7), for judging motor (12,13) running state; A regeneration discharging resistance (5) and a regeneration discharge IGBT (4), the regenerated energy producing for consuming elevator; It is characterized in that: described controller (7) drives two above traction motors (12,13), and the car (20,21) that each traction motor drags respectively separately moves up and down; Described controller can calculate the needed power of each elevator; If the elevator of a motoring condition needs starting operation, and exist other elevator in reproduced state, output drive signal, controls the elevator starter operation of this reproduced state; If there are at least two elevators all to carry out motoring condition operation, and rectifier maximum power can not meet the power requirement of many elevator electrics operation, and output drive signal, reduces at least one elevator speed; If there are at least two elevators all to carry out reproduced state when operation, and the maximum power of regeneration discharging resistance and regeneration discharge IGBT can not meet the power requirement of many elevator regenerated operations, and output drive signal, reduces at least one elevator speed.

2. a control method for elevator control gear as claimed in claim 1, is characterized in that, comprises the following steps:

Controller calculates the needed power of each elevator; If the elevator of a motoring condition needs starting operation, and exist other elevator in reproduced state, controller output drive signal, controls the elevator starter operation of this reproduced state;

If there are at least two elevators all to carry out motoring condition operation, and rectifier maximum power can not meet the power requirement of many elevator electrics operation, and controller output drive signal, reduces at least one elevator speed;

If there are at least two elevators all to carry out reproduced state when operation, and the maximum power of regeneration discharging resistance and regeneration discharge IGBT can not meet the power requirement of many elevator regenerated operations, and controller output drive signal, reduces at least one elevator speed.