CN105417297A - Start and brake method and start and brake system for elevator with magnetorheological fluid brake - Google Patents
Start and brake method and start and brake system for elevator with magnetorheological fluid brake Download PDFInfo
- Publication number
- CN105417297A CN105417297A CN201510985424.2A CN201510985424A CN105417297A CN 105417297 A CN105417297 A CN 105417297A CN 201510985424 A CN201510985424 A CN 201510985424A CN 105417297 A CN105417297 A CN 105417297A
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- Prior art keywords
- brake
- magneto
- motor
- plc
- elevator
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/02—Control systems without regulation, i.e. without retroactive action
- B66B1/06—Control systems without regulation, i.e. without retroactive action electric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D57/00—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
- F16D57/002—Liquid-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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Elevator Control (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention provides a start and brake method and a start and brake system for an elevator with a magnetorheological fluid brake. The system comprises a controller and the magnetorheological fluid brake, wherein a rotor of the magnetorheological fluid brake is arranged on a motor spindle, and the current output terminal of a voltage-controlled current source is connected to an electromagnetic coil of the magnetorheological fluid brake. The elevator start method includes the steps that the controller transmits a voltage control signal to the voltage-controlled current source, and the voltage-controlled current source outputs currents to a brake coil. The elevator brake method includes the steps that the controller transmits a voltage control signal to the voltage-controlled current source, and the voltage-controlled current source reduces currents output to the coil of the magnetorheological fluid brake. The method and the system have the positive effects that the start and brake method and the start and brake system are provided for the elevator with the magnetorheological fluid brake, output of an S-shaped variable frequency three-phase voltage by a frequency converter is not required, and various advantages of the magnetorheological fluid brake are brought into full play on a traction machine.
Description
Technical field
The present invention relates to the startup of elevator, braking method and startup, brake equipment, is the startup of the elevator using magneto-rheologic liquid brake, braking method and startup, brake system specifically.
Background technology
The drg that current elevator uses is switching regulator drg, and it starts brake system and comprises, and controller such as PLC or singlechip controller, frequency converter and motor control successively, and brake disc, the coder of switching regulator drg are arranged on the main shaft of motor.The method controlling elevator startup is: release the brake; Controller such as PLC or singlechip controller send the signal of electric motor starting to frequency converter; Frequency converter exports S curve deformation three phasevoltage frequently to motor; Motor speed starts by S curve.The method controlling elevator stopping is that controller sends the signal of motor stopping to frequency converter; Frequency converter exports S curve deformation three phasevoltage frequently to motor; Motor speed is decelerated to shutdown by S shape; Lock of controller afterwards.Visible, it exports S deformation three phasevoltage frequently by frequency converter, controls the startup of motor, deceleration.
CN102249136A discloses a kind of gearless traction machine adopting magneto-rheologic liquid brake, the rotor of magneto-rheologic liquid brake is arranged on electric machine main shaft, by controlling the electrical current of magnet coil of magneto-rheologic liquid brake and the size of the magnetic flux of generation thereof, change the state of magnetic flow liquid, realization starts, brake.It is applied in elevator has volume is little, cost is low, control policy is simple, noise is low, long service life, ride comfort, and the feature performance benefit such as substantially need not to keep in repair, and is the developing direction of elevator brake.
Summary of the invention
The object of the invention is: provide a kind of and use the startup braking method of the elevator of magneto-rheologic liquid brake and start brake system.
The object of the present invention is achieved like this: it comprises PLC or singlechip controller, magneto-rheologic liquid brake, the rotor of magneto-rheologic liquid brake is arranged on electric machine main shaft, it is characterized in that: the current output terminal of voltage controlled current source is connected on the magnet coil of magneto-rheologic liquid brake, the analog output of PLC or singlechip controller terminates on the adjustment input end of voltage controlled current source.
The control method that elevator starts first switches on power to motor, and now because not having to magneto-rheologic liquid brake outgoing current, drg is maximum braking moment, and motor, by locking, is in stall running state, secondly, after PLC or singlechip controller compare with the velocity curve of setting according to the information of encoder feedback, adjustment input end to voltage controlled current source sends current controling signal, voltage controlled current source is according to the magnet coil outgoing current of this signal to magneto-rheologic liquid brake, it is zero that resultant magnetic field (electromagnetic field that coil is formed and permanent magnet field are formed) is moved closer to, magnetic flow liquid gradually becomes liquid, the lock torque that magnetic rheological brake exports diminishes until be 0 by maximum, now be equivalent to drg and be in complete release position, motor starts normal operation,
The control method of elevator brake is, when motor runs to braking position, sends 0 level signal to voltage controlled current source, magneto-rheologic liquid brake coil current is 0, magnetic flow liquid gradually becomes solid-state, and drg exports maximum braking moment, and electrical motor is in stall running state.To motor power cutoff.
Compared with prior art, good effect of the present invention is: it is adopt the elevator of magneto-rheologic liquid brake to provide start braking method and start brake system, and it does not need frequency converter to export S deformation three phasevoltage frequently, achieve the combination of asynchronous motor and magneto-rheologic liquid brake, and make every advantage towing machine of magneto-rheologic liquid brake is not fully exerted.
Accompanying drawing explanation
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is that the present invention uses frequency converter as schematic diagram during electric power switch.
Fig. 2 is that the present invention uses contactless switch as schematic diagram during electric power switch.
Detailed description of the invention
Embodiment one: use frequency converter as electric power switch
See Fig. 1, its startup brake system comprises PLC or singlechip controller, magneto-rheologic liquid brake, the rotor of magneto-rheologic liquid brake is arranged on electric machine main shaft, the current output terminal of voltage controlled current source is connected on the magnet coil of magneto-rheologic liquid brake, the analog output of PLC or singlechip controller terminates on the adjustment input end of voltage controlled current source, and the on off control end of frequency converter is connected with the output switch parameter end of PLC.
The control method that elevator starts is, actuation signal is exported by PLC, frequency converter is made to export three-phase alternating voltage to AC asynchronous motor by predetermined frequency (frequency that the Speed Setting run by elevator is different) of determining, now, because not controlling electric current to magneto-rheologic liquid brake, drg is maximum braking moment, and electrical motor, by locking, is in stall running state.
After PLC compares with the velocity curve of setting according to the information of encoder feedback, adjustment input end to voltage controlled current source sends current controling signal, voltage controlled current source is according to the magnet coil outgoing current of this signal to magneto-rheologic liquid brake, it is zero that resultant magnetic field is moved closer to, magnetic flow liquid gradually becomes liquid, the lock torque that magnetic rheological brake exports diminishes until be 0 by maximum, now be equivalent to drg and be in complete release position, motor starts normal operation, and coder exports and rotates corresponding P-pulse and speed signal therewith.
PLC finds corresponding pre-set velocity according to the position signal that coder returns, and compare with coder return velocity signal, and the control electric current of magneto-rheologic liquid brake is exported according to comparative result, if the rotating speed of electrical motor is higher than the speed preset, the control electric current exporting magneto-rheologic liquid brake reduces, increase lock torque, make motor deceleration; If the rotating speed of electrical motor is lower than the speed preset, the control electric current exporting magneto-rheologic liquid brake subtracts increase, reduces lock torque, electrical motor is accelerated.
When motor rotation velocity reaches the pre-set velocity of frequency converter, control electric current to magneto-rheologic liquid brake and reach rated current, drg is zero lock torque, and electrical motor is in normal operating condition.
The control method of elevator brake is, when motor running is to braking position, PLC finds corresponding pre-set velocity according to the position signal that coder returns, and compare with coder return velocity signal, and the control electric current of magneto-rheologic liquid brake is exported according to comparative result, if the rotating speed of electrical motor is higher than the speed preset, the control electric current exporting magneto-rheologic liquid brake reduces, and increases lock torque, makes motor deceleration; If the rotating speed of electrical motor is lower than the speed preset, the control electric current exporting magneto-rheologic liquid brake subtracts increase, reduce lock torque, electrical motor is accelerated, until electrical motor runs to stop position by predetermined speed, PLC sends 0 voltage control signal to voltage controlled current source, voltage controlled current source stops to magneto-rheologic liquid brake coil outgoing current, and brake, electrical motor is in stall running state.
PLC is to frequency converter output motor danger signal, and make frequency converter stop exporting three-phase alternating voltage to AC asynchronous motor, electrical motor is out of service.
Embodiment two: use contactless switch as electric power switch
See Fig. 2, its startup brake system comprises PLC or singlechip controller, magneto-rheologic liquid brake, the rotor of magneto-rheologic liquid brake is arranged on electric machine main shaft, the current output terminal of voltage controlled current source is connected on the magnet coil of magneto-rheologic liquid brake, the analog output of PLC or singlechip controller terminates on the adjustment input end of voltage controlled current source, and the coil-end of contactless switch is connected with the output switch parameter end of PLC.
The control method that elevator starts is, PLC or singlechip controller send actuation signal by output switch parameter end to contactless switch, contactless switch adhesive electrical motor powers on, now because not having to magneto-rheologic liquid brake outgoing current, drg is maximum braking moment, motor, by locking, is in stall running state; Step is above identical with enforcement one.
The control method of elevator brake is, step is above one identical with enforcement, last step be PLC to contactless switch output motor danger signal, make contactless switch stop exporting three-phase alternating voltage to AC asynchronous motor, electrical motor is out of service.
When motor needs frequency of utilization to control its rotating speed, need to use frequency converter; Otherwise, use contactless switch.
Claims (6)
1. magneto-rheologic liquid brake elevator starts a braking method, it is characterized in that:
(1) rate-determining steps that elevator starts is,
(1.1) switch on power to motor;
(1.2) after PLC or singlechip controller compare with the velocity curve of setting according to the information of encoder feedback, adjustment input end to voltage controlled current source sends current controling signal, voltage controlled current source is according to the magnet coil outgoing current of this signal to magneto-rheologic liquid brake, it is zero that resultant magnetic field is moved closer to, and motor starts normal operation;
(2) rate-determining steps of elevator brake is,
(2.1) when motor runs to braking position, PLC or micro controller system send 0 level signal to the adjustment input end of voltage controlled current source, voltage controlled current source is according to the magnet coil output 0 of this signal to magneto-rheologic liquid brake, and magneto-rheologic liquid brake exports maximum braking moment;
(2.2) to motor power cutoff.
2. start braking method according to magneto-rheologic liquid brake elevator according to claim 1, it is characterized in that:
Said is export actuation signal by PLC to the motor step that switches on power, and makes frequency converter determine rate-adaptive pacemaker to three-phase alternating voltage to AC asynchronous motor by predetermined; Said motor power cutoff of giving is, PLC, to frequency converter output motor danger signal, makes frequency converter stop exporting three-phase alternating voltage to AC asynchronous motor.
3. start braking method according to magneto-rheologic liquid brake elevator according to claim 1, it is characterized in that:
Said is send actuation signal by output switch parameter end to contactless switch by PLC to the motor step that switches on power, and contactless switch adhesive, electrical motor power on; Said is that PLC, to contactless switch output motor danger signal, makes contactless switch disconnect to motor power cutoff.
4. a magneto-rheologic liquid brake elevator starts brake system, comprise PLC or singlechip controller, magneto-rheologic liquid brake, the rotor of magneto-rheologic liquid brake is arranged on electric machine main shaft, it is characterized in that: the mouth of voltage controlled current source is connected on the magnet coil of magneto-rheologic liquid brake, the analog output of PLC or singlechip controller terminates on the adjustment input end of voltage controlled current source.
5. start brake system according to magneto-rheologic liquid brake elevator according to claim 4, it is characterized in that: the on off control end of frequency converter is connected with the output switch parameter end of PLC.
6. start brake system according to magneto-rheologic liquid brake elevator according to claim 4, it is characterized in that: the coil-end of contactless switch is connected with the output switch parameter end of PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510985424.2A CN105417297B (en) | 2015-12-25 | 2015-12-25 | Magneto-rheologic liquid brake elevator starts braking method and starts braking system |
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| CN201510985424.2A CN105417297B (en) | 2015-12-25 | 2015-12-25 | Magneto-rheologic liquid brake elevator starts braking method and starts braking system |
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| CN105417297A true CN105417297A (en) | 2016-03-23 |
| CN105417297B CN105417297B (en) | 2018-08-07 |
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| CN201510985424.2A Active CN105417297B (en) | 2015-12-25 | 2015-12-25 | Magneto-rheologic liquid brake elevator starts braking method and starts braking system |
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Cited By (4)
| 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 |
| CN108773750A (en) * | 2018-06-06 | 2018-11-09 | 辽宁优力安机电设备有限公司 | The detection method of magneto-rheologic liquid brake elevator operation damping |
| CN109278563A (en) * | 2018-09-30 | 2019-01-29 | 合肥工业大学 | The control method of automobile-used magnetorheological fluid braking system based on braking intention identification |
| CN111942344A (en) * | 2020-07-14 | 2020-11-17 | 南京天航智能装备研究院有限公司 | Line control hydraulic braking system with motor locked-rotor protection device and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1017222A (en) * | 1996-06-28 | 1998-01-20 | Toshiba Corp | Elevator control device |
| 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 |
-
2015
- 2015-12-25 CN CN201510985424.2A patent/CN105417297B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1017222A (en) * | 1996-06-28 | 1998-01-20 | Toshiba Corp | Elevator control device |
| 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 |
Cited By (5)
| 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 |
| CN108773750A (en) * | 2018-06-06 | 2018-11-09 | 辽宁优力安机电设备有限公司 | The detection method of magneto-rheologic liquid brake elevator operation damping |
| CN109278563A (en) * | 2018-09-30 | 2019-01-29 | 合肥工业大学 | The control method of automobile-used magnetorheological fluid braking system based on braking intention identification |
| 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 |
| CN111942344A (en) * | 2020-07-14 | 2020-11-17 | 南京天航智能装备研究院有限公司 | Line control hydraulic braking system with motor locked-rotor protection device and control method |
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| CN105417297B (en) | 2018-08-07 |
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