CN105417297B - Magneto-rheologic liquid brake elevator starts braking method and starts braking system - Google Patents

Magneto-rheologic liquid brake elevator starts braking method and starts braking system Download PDF

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Publication number
CN105417297B
CN105417297B CN201510985424.2A CN201510985424A CN105417297B CN 105417297 B CN105417297 B CN 105417297B CN 201510985424 A CN201510985424 A CN 201510985424A CN 105417297 B CN105417297 B CN 105417297B
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China
Prior art keywords
magneto
motor
rheologic liquid
brake
plc controller
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CN105417297A (en
Inventor
张安戈
张伟
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LIAONING YOULI'AN ELECTROMECHANICAL EQUIPMENT Co Ltd
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LIAONING YOULI'AN ELECTROMECHANICAL EQUIPMENT Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66BELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B1/00Control systems of elevators in general
    • B66B1/02Control systems without regulation, i.e. without retroactive action
    • B66B1/06Control systems without regulation, i.e. without retroactive action electric
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D5/00Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D57/00Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
    • F16D57/002Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders comprising a medium with electrically or magnetically controlled internal friction, e.g. electrorheological fluid, magnetic powder

Abstract

A kind of magneto-rheologic liquid brake elevator of present invention offer starts braking method and starts braking system, it includes controller, magneto-rheologic liquid brake, the rotor of magneto-rheologic liquid brake is mounted on electric machine main shaft, and the current output terminal of voltage controlled current source is connected on the electromagnetic coil of magneto-rheologic liquid brake.Elevator starts method, and controller sends out voltage control signal to voltage controlled current source, and voltage controlled current source is to brake coil output current;Elevator brake method is that controller sends out voltage control signal to voltage controlled current source, and voltage controlled current source reduces the output current to magneto-rheologic liquid brake coil.The positive effect of the present invention is:It is started braking method and starts braking system to be provided using the elevator of magneto-rheologic liquid brake, and does not need frequency converter output S-shaped frequency conversion three-phase voltage, and makes to be not fully exerted on every advantage traction machine of magneto-rheologic liquid brake.

Description

Magneto-rheologic liquid brake elevator starts braking method and starts braking system
Technical field
The present invention relates to the startup of elevator, braking method and startup, brake apparatus, are specifically braked using magnetorheological fluid Startup, braking method and the startup of the elevator of device, braking system.
Background technology
The brake that elevator uses at present is switching regulator brake, starts braking system and includes, controller such as PLC controls Device or singlechip controller, frequency converter and motor control successively, and the brake disc of switching regulator brake, encoder are mounted on motor On main shaft.Controlling the method that elevator starts is:Release brake;Controller such as PLC controller or singlechip controller are to frequency conversion Device sends out the signal of electric motor starting;Frequency converter exports S curve deformation frequency three-phase voltage to motor;Motor speed is started by S curve. The method that control elevator stops is that controller sends out the signal that motor stops to frequency converter;Frequency converter exports S curve shape to motor Frequency conversion three-phase voltage;Motor speed is decelerated to shutdown by S-shaped;Lock of controller later.As it can be seen that it is to export S by frequency converter Deformation frequency three-phase voltage, to control the startup of motor, slow down.
102249136 A of CN disclose a kind of gearless traction machine using magneto-rheologic liquid brake, magneto-rheologic liquid brake Rotor be mounted on electric machine main shaft on, pass through control magneto-rheologic liquid brake electromagnetic coil electrical current and its generation magnetic Logical size, to change the state of magnetorheological fluid, realize start, braking.It is applied has small, cost on elevator It is low, control strategy is simple, noise is low, service life is long, ride comfort, and it is basic do not have to the feature performance benefits such as repair, be elevator system The developing direction of dynamic device.
Invention content
The purpose of the present invention is:A kind of startup braking method of the elevator using magneto-rheologic liquid brake is provided and is started and is made Dynamic system.
The object of the present invention is achieved like this:It includes PLC controller or singlechip controller, magnetorheological fluid braking The rotor of device, magneto-rheologic liquid brake is mounted on electric machine main shaft, it is characterized in that:The current output terminal of voltage controlled current source connects On the electromagnetic coil of magneto-rheologic liquid brake, the analog output of PLC controller or singlechip controller terminates at voltage control On the adjusting input terminal of current source processed.
The control method that elevator starts is to power on first to motor, at this time because defeated not to magneto-rheologic liquid brake Go out electric current, brake is maximum braking moment, and motor is in stall operating status by locking;Secondly, PLC controller or monolithic Machine controller according to the information of encoder feedback and the rate curve of setting relatively after, inputted to the adjusting of voltage controlled current source End sends out current controling signal, and voltage controlled current source exports electricity according to this signal to the electromagnetic coil of magneto-rheologic liquid brake Stream, makes resultant magnetic field(The electromagnetic field that coil is formed is formed with permanent magnet field)It is zero to move closer to, and magnetorheological fluid gradually becomes For liquid, the braking moment of magnetic rheological brake output is become smaller by maximum until being 0, is equivalent to brake at this time and is in and releases completely State is put, motor starts to run well;
The control method of elevator brake is, when motor operation is to application position, 0 level is sent out to voltage controlled current source Signal, magneto-rheologic liquid brake coil current are 0, and magnetorheological fluid gradually becomes solid-state, and brake exports maximum braking moment, electricity Motivation is in stall operating status.Give motor power cutoff.
Compared with prior art, the positive effect of the present invention is:It is provides using the elevator of magneto-rheologic liquid brake Start braking method and start braking system, and it does not need frequency converter output S-shaped frequency conversion three-phase voltage, realizes asynchronous electric The combination of machine and magneto-rheologic liquid brake, and make to be not fully exerted on every advantage traction machine of magneto-rheologic liquid brake.
Description of the drawings
It further illustrates the present invention below in conjunction with the accompanying drawings.
Fig. 1 is that the present invention uses schematic diagram of the frequency converter as electric power switch when.
Fig. 2 is that the present invention uses schematic diagram of the contactor as electric power switch when.
Specific implementation mode
Embodiment one:Using frequency converter as electric power switch
Referring to Fig. 1, its startup braking system includes PLC controller or singlechip controller, magneto-rheologic liquid brake, magnetic The rotor of rheology fluid brake is mounted on electric machine main shaft, and the current output terminal of voltage controlled current source is connected on magnetorheological fluid braking On the electromagnetic coil of device, the analog output of PLC controller or singlechip controller terminates at the adjusting of voltage controlled current source On input terminal, the start-up and shut-down control end of frequency converter and the output switch parameter end of PLC controller connect.
The control method that elevator starts is to export enabling signal by PLC controller, and frequency converter is made to determine frequency by scheduled (The speed run by elevator sets different frequencies)Three-phase alternating voltage is exported to AC asynchronous motor, at this point, because not having Electric current is controlled to magneto-rheologic liquid brake, brake is maximum braking moment, and motor is in stall operating status by locking.
PLC controller according to the information of encoder feedback and the rate curve of setting relatively after, to voltage controlled current source Adjusting input terminal send out current controling signal, voltage controlled current source is according to this signal to the electromagnetic wire of magneto-rheologic liquid brake Output current is enclosed, it is zero so that resultant magnetic field is moved closer to, and magnetorheological fluid gradually becomes liquid, the braking of magnetic rheological brake output Torque is become smaller by maximum until being 0, is equivalent to brake at this time and is in complete release conditions, motor starts to run well, coding Device exports P-pulse corresponding with this rotation and speed signal.
PLC controller finds corresponding pre-set velocity according to the position signal that encoder returns, and returns to speed with encoder Degree signal compares, and the control electric current of magneto-rheologic liquid brake is exported according to comparison result, if the rotating speed of motor is higher than pre- If speed then export magneto-rheologic liquid brake control electric current reduce, increase braking moment, make motor deceleration;If electronic The control electric current that the rotating speed of machine then exports magneto-rheologic liquid brake less than preset speed subtracts increase, reduces braking moment, makes electricity Motivation accelerates.
When motor rotation velocity reaches the pre-set velocity of frequency converter, reach volume to magneto-rheologic liquid brake control electric current Constant current, brake are zero braking moment, and motor is in normal operating condition.
The control method of elevator brake is that, when motor running is to application position, PLC controller is returned according to encoder Position signal find corresponding pre-set velocity, and compared with encoder return speed signal, and magnetic is exported according to comparison result The control electric current of rheology fluid brake, if the rotating speed of motor higher than the control for exporting magneto-rheologic liquid brake if preset speed Electric current processed is reduced, and is increased braking moment, is made motor deceleration;Magnetic current is exported if the rotating speed of motor is less than preset speed The control electric current for becoming fluid brake subtracts increase, reduces braking moment, motor is made to accelerate, until motor is run by predetermined speed To stop position, PLC controller sends out 0 voltage control signal to voltage controlled current source, and voltage controlled current source stops to magnetic Rheology fluid brake coil output current, brake, motor are in stall operating status.
PLC controller makes frequency converter stopping export three-phase alternating voltage to exchange to frequency converter output motor stop signal Asynchronous motor, motor are out of service.
Embodiment two:Using contactor as electric power switch
Referring to Fig. 2, its startup braking system includes PLC controller or singlechip controller, magneto-rheologic liquid brake, magnetic The rotor of rheology fluid brake is mounted on electric machine main shaft, and the current output terminal of voltage controlled current source is connected on magnetorheological fluid braking On the electromagnetic coil of device, the analog output of PLC controller or singlechip controller terminates at the adjusting of voltage controlled current source On input terminal, the coil-end of contactor and the output switch parameter end of PLC controller connect.
The control method that elevator starts is, PLC controller or singlechip controller are by output switch parameter end to contactor Enabling signal is sent out, contactor is attracted motor and powers on, at this time because to magneto-rheologic liquid brake output current, brake is not Maximum braking moment, motor are in stall operating status by locking;The step of front, is identical as implementing one.
The control method of elevator brake is, before the step of it is identical as implementing one, the last one step be PLC controller to Contactor output motor stop signal makes contactor stopping export three-phase alternating voltage to AC asynchronous motor, and motor stops Only run.
When motor needs frequency of use to control its rotating speed, need to use frequency converter;Conversely, using contactor.

Claims (4)

1. a kind of magneto-rheologic liquid brake elevator starts braking method, it is characterized in that:
(1)Elevator start rate-determining steps be,
(1.1)Power on to motor;
(1.2)PLC controller or singlechip controller according to the information of encoder feedback and the rate curve of setting relatively after, to The adjusting input terminal of voltage controlled current source sends out current controling signal, and voltage controlled current source is according to this signal to magnetorheological fluid The electromagnetic coil output current of brake, it is zero so that resultant magnetic field is moved closer to, and motor starts to run well;
(2)The rate-determining steps of elevator brake are,
(2.1)When motor operation is to application position, PLC controller or microcontroller are found according to the position signal that encoder returns Corresponding pre-set velocity, and export magneto-rheologic liquid brake compared with encoder return speed signal, and according to comparison result Electric current is controlled, until motor runs to stop position, PLC controller or microcontroller to voltage controlled current source by predetermined speed Adjusting input terminal send out 0 level signal, voltage controlled current source is according to this signal to the electromagnetic coil of magneto-rheologic liquid brake Output 0, magneto-rheologic liquid brake export maximum braking moment;
(2.2)Give motor power cutoff;
Described the step of powering on to motor is to export enabling signal by PLC controller or microcontroller, make frequency converter by predetermined Determine rate-adaptive pacemaker to three-phase alternating voltage to AC asynchronous motor;It is described to be to motor power cutoff, PLC controller or list Piece machine makes frequency converter stopping export three-phase alternating voltage to AC asynchronous motor to frequency converter output motor stop signal.
2. a kind of magneto-rheologic liquid brake elevator starts braking method, it is characterized in that:
(1)Elevator start rate-determining steps be,
(1.1)Power on to motor;
(1.2)PLC controller or singlechip controller according to the information of encoder feedback and the rate curve of setting relatively after, to The adjusting input terminal of voltage controlled current source sends out current controling signal, and voltage controlled current source is according to this signal to magnetorheological fluid The electromagnetic coil output current of brake, it is zero so that resultant magnetic field is moved closer to, and motor starts to run well;
(2)The rate-determining steps of elevator brake are,
(2.1)When motor operation is to application position, PLC controller or microcontroller are found according to the position signal that encoder returns Corresponding pre-set velocity, and export magneto-rheologic liquid brake compared with encoder return speed signal, and according to comparison result Electric current is controlled, until motor runs to stop position, PLC controller or microcontroller to voltage controlled current source by predetermined speed Adjusting input terminal send out 0 level signal, voltage controlled current source is according to this signal to the electromagnetic coil of magneto-rheologic liquid brake Output 0, magneto-rheologic liquid brake export maximum braking moment;
(2.2)Give motor power cutoff;
It is described that power on step to motor be to be sent out from PLC controller or microcontroller to contactor by output switch parameter end Enabling signal, contactor is attracted, motor powers on;Described to be to motor power cutoff, PLC controller or microcontroller are to contactor Output motor stop signal, makes contactor disconnect.
3. the magneto-rheologic liquid brake elevator for being started braking method using magneto-rheologic liquid brake elevator described in claim 1 is opened Dynamic braking system, including PLC controller or singlechip controller, magneto-rheologic liquid brake, the rotor of magneto-rheologic liquid brake and Encoder be mounted on electric machine main shaft on, frequency converter as electric power switch, it is characterized in that:The output end of voltage controlled current source It is connected on the electromagnetic coil of magneto-rheologic liquid brake, the analog output of PLC controller or singlechip controller terminates at voltage On the adjusting input terminal for controlling current source, the signal output end of encoder is connected on PLC controller or singlechip controller, frequency conversion The start-up and shut-down control end of device is connect with the output switch parameter end of PLC controller or microcontroller.
4. the magneto-rheologic liquid brake elevator for being started braking method using the magneto-rheologic liquid brake elevator described in claim 2 is opened Dynamic braking system, including PLC controller or singlechip controller, magneto-rheologic liquid brake, the rotor of magneto-rheologic liquid brake and Encoder be mounted on electric machine main shaft on, contactor as electric power switch, it is characterized in that:The output end of voltage controlled current source It is connected on the electromagnetic coil of magneto-rheologic liquid brake, the analog output of PLC controller or singlechip controller terminates at voltage On the adjusting input terminal for controlling current source, the signal output end of encoder is connected on PLC controller or singlechip controller, contact The coil-end of device is connect with the output switch parameter end of PLC controller or microcontroller.
CN201510985424.2A 2015-12-25 2015-12-25 Magneto-rheologic liquid brake elevator starts braking method and starts braking system Active CN105417297B (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106115432A (en) * 2016-08-31 2016-11-16 江苏创力电梯部件有限公司 A kind of emergency staircase of compact conformation
CN108773750B (en) * 2018-06-06 2019-11-12 辽宁优力安机电设备有限公司 The detection method of magneto-rheologic liquid brake elevator operation damping
CN109278563B (en) * 2018-09-30 2021-09-17 合肥工业大学 Control method of vehicle magnetorheological fluid braking system based on braking intention identification

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Publication number Priority date Publication date Assignee Title
CN1478050A (en) * 2001-09-28 2004-02-25 三菱电机株式会社 Brake controller of elevator
CN203474156U (en) * 2013-09-16 2014-03-12 福州大学 Elevator traction clutch and brake system and device based on magneto-rheological effect
CN105060037A (en) * 2015-08-10 2015-11-18 上海新时达电气股份有限公司 Brake control method and system
CN205367353U (en) * 2015-12-25 2016-07-06 辽宁优力安机电设备有限公司 Magneto -rheological fluid brake elevator starts braking system

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
JP3310166B2 (en) * 1996-06-28 2002-07-29 株式会社東芝 Elevator control device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1478050A (en) * 2001-09-28 2004-02-25 三菱电机株式会社 Brake controller of elevator
CN203474156U (en) * 2013-09-16 2014-03-12 福州大学 Elevator traction clutch and brake system and device based on magneto-rheological effect
CN105060037A (en) * 2015-08-10 2015-11-18 上海新时达电气股份有限公司 Brake control method and system
CN205367353U (en) * 2015-12-25 2016-07-06 辽宁优力安机电设备有限公司 Magneto -rheological fluid brake elevator starts braking system

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