CN205367353U - Magneto -rheological fluid brake elevator starts braking system - Google Patents
Magneto -rheological fluid brake elevator starts braking system Download PDFInfo
- Publication number
- CN205367353U CN205367353U CN201521092521.0U CN201521092521U CN205367353U CN 205367353 U CN205367353 U CN 205367353U CN 201521092521 U CN201521092521 U CN 201521092521U CN 205367353 U CN205367353 U CN 205367353U
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- China
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- magneto
- rheological fluid
- fluid brake
- brake
- current source
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Abstract
The utility model provides a magneto -rheological fluid brake elevator starts braking system, it includes controller, magneto -rheological fluid brake, and magneto -rheological fluid brake's mounting of rotors is on motor spindle, and voltage controlled current source 's current output terminal connects on magneto -rheological fluid brake's solenoid. Elevator start -up method is, the controller sends the voltage control signal to voltage controlled current source, and voltage controlled current source is to stopper coil output current, elevator braking method is, the controller sends the voltage control signal to voltage controlled current source, and voltage controlled current source reduces the output current to the magneto -rheological fluid brake coil. The utility model discloses an actively the effect is: it provides start -up braking method and has started braking system for the elevator that adopts magneto -rheological fluid brake, and does not need converter output S -shaped frequency conversion three phase voltage to obtain full play on each item advantage hauler of messenger magneto -rheological fluid brake.
Description
Technical field
This utility model relates to the startup of elevator, braking method and startup, brake unit, specifically uses the startup of the elevator of magneto-rheologic liquid brake, braking method and startup, brakes.
Background technology
The brake that current elevator uses is switching regulator brake, and it starts brakes and includes, and controller such as PLC or singlechip controller, converter and motor control successively, and the braking dish of switching regulator brake, encoder are arranged on the main shaft of motor.The method controlling elevator startup is: release brake；Controller such as PLC or singlechip controller send the signal of electric motor starting to converter；Converter exports S curve deformation frequency three-phase voltage to motor；Motor speed starts by S curve.The method controlling elevator stopping is that controller sends, to converter, the signal that motor stops；Converter exports S curve deformation frequency three-phase voltage to motor；Motor speed is decelerated to shutdown by S shape；Lock of controller afterwards.Visible, it is to export S deformation frequency three-phase voltage by 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, size by the electrical current of the solenoid of control magneto-rheologic liquid brake and the magnetic flux of generation thereof, change the state of magnetic flow liquid, it is achieved start, braking.It is applied on elevator to have, and volume is little, cost is low, control strategy is simple, noise is low, long service life, ride comfort, and the feature performance benefit such as substantially need not keep in repair, and is the developing direction of elevator brake.
Summary of the invention
The purpose of this utility model is: provide the startup brakes of a kind of elevator using magneto-rheologic liquid brake.
The purpose of this utility model is achieved in that it includes 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 solenoid of magneto-rheologic liquid brake, the analog output of PLC or singlechip controller terminates on the adjustment input of Voltage-controlled Current Source.
The control method that elevator starts is first to switch on power to motor, and now because not exporting electric current to magneto-rheologic liquid brake, brake is maximum braking moment, and motor, by locking, is in stall running status；Secondly, after PLC or singlechip controller compare with the rate curve of setting according to the information of encoder feedback, current controling signal is sent to the adjustment input of Voltage-controlled Current Source, Voltage-controlled Current Source exports electric current according to this signal to the solenoid of magneto-rheologic liquid brake, making resultant magnetic field (electromagnetic field that coil is formed is formed with permanent magnet field) move closer to is zero, magnetic flow liquid gradually becomes liquid, the braking moment of magnetic rheological brake output is diminished until being 0 by maximum, now be equivalent to brake and be in complete release conditions, motor starts to run well；
The control method of elevator brake is, when motor runs to application 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 brake output maximum braking moment, motor is in stall running status.To motor power cutoff.
Compared with prior art, the elevator having the benefit effect that it is employing magneto-rheologic liquid brake of the present utility model provides startup braking method and startup brakes, and it need not export S deformation frequency three-phase voltage by converter, achieve the combination of asynchronous motor and magneto-rheologic liquid brake, and make every advantage traction machine of magneto-rheologic liquid brake is not fully exerted.
Accompanying drawing explanation
This utility model is further illustrated below in conjunction with accompanying drawing.
Fig. 1 be this utility model use converter as electric power switch time schematic diagram.
Fig. 2 be this utility model use catalyst as electric power switch time schematic diagram.
Detailed description of the invention
Embodiment one: use converter as electric power switch
Referring to Fig. 1, its startup brakes includes 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 solenoid of magneto-rheologic liquid brake, the analog output of PLC or singlechip controller terminates on the adjustment input of Voltage-controlled Current Source, and the on off control end of converter is connected with the output switch parameter end of PLC.
The control method that elevator starts is, enabling signal is exported by PLC, converter is made to export three-phase alternating voltage to AC asynchronous motor by predetermined frequency (speed run by elevator sets different frequencies) of determining, now, because not controlling electric current to magneto-rheologic liquid brake, brake is maximum braking moment, and motor, by locking, is in stall running status.
After PLC compares with the rate curve of setting according to the information of encoder feedback, current controling signal is sent to the adjustment input of Voltage-controlled Current Source, Voltage-controlled Current Source exports electric current according to this signal to the solenoid of magneto-rheologic liquid brake, making resultant magnetic field move closer to is zero, magnetic flow liquid gradually becomes liquid, the braking moment of magnetic rheological brake output is diminished until being 0 by maximum, now be equivalent to brake and be in complete release conditions, motor starts to run well, and encoder output rotates corresponding P-pulse and rate signal with this.
PLC finds the pre-set velocity of correspondence according to the position signalling that encoder returns, and compare with encoder return speed signal, and the control electric current of magneto-rheologic liquid brake is exported according to comparative result, if the rotating speed of motor is higher than the speed preset, the control electric current exporting magneto-rheologic liquid brake reduces, increase braking moment, make motor deceleration；If the rotating speed of motor is lower than default speed, the control electric current exporting magneto-rheologic liquid brake subtracts increase, reduces braking moment, makes motor accelerate.
When motor rotation velocity reaches the pre-set velocity of converter, controlling electric current to magneto-rheologic liquid brake and reach rated current, brake is zero braking moment, and motor is in normal operating condition.
The control method of elevator brake is, when motor running to application position, PLC finds the pre-set velocity of correspondence according to the position signalling that encoder returns, and compare with encoder return speed signal, and the control electric current of magneto-rheologic liquid brake is exported according to comparative result, if the rotating speed of motor is higher than the speed preset, the control electric current exporting magneto-rheologic liquid brake reduces, and increases braking moment, makes motor deceleration；If the rotating speed of motor is lower than default speed, the control electric current exporting magneto-rheologic liquid brake subtracts increase, reduce braking moment, motor is made to accelerate, until motor runs to stop position by predetermined speed, PLC sends 0 voltage control signal to Voltage-controlled Current Source, Voltage-controlled Current Source stops exporting electric current to magneto-rheologic liquid brake coil, and brake, motor is in stall running status.
PLC, to converter output motor stop signal, makes converter stop output three-phase alternating voltage to AC asynchronous motor, and motor is out of service.
Embodiment two: use catalyst as electric power switch
Referring to Fig. 2, its startup brakes includes 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 solenoid of magneto-rheologic liquid brake, the analog output of PLC or singlechip controller terminates on the adjustment input of Voltage-controlled Current Source, and the coil-end of catalyst is connected with the output switch parameter end of PLC.
The control method that elevator starts is, PLC or singlechip controller send enabling signal by output switch parameter end to catalyst, catalyst adhesive motor powers on, now because not exporting electric current to magneto-rheologic liquid brake, brake is maximum braking moment, motor, by locking, is in stall running status；Step above is identical with enforcement one.
The control method of elevator brake is, step above with implement one identical, last step be PLC to catalyst output motor stop signal, make catalyst stop output three-phase alternating voltage to AC asynchronous motor, motor is out of service.
When motor needs to use its rotating speed of FREQUENCY CONTROL, it is necessary to use converter；Otherwise, use catalyst.
Claims (3)
1. a magneto-rheologic liquid brake elevator starts brakes, including 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 outfan of Voltage-controlled Current Source is connected on the solenoid of magneto-rheologic liquid brake, the analog output of PLC or singlechip controller terminates on the adjustment input of Voltage-controlled Current Source.
2. the magneto-rheologic liquid brake elevator described in claim 1 starts brakes, it is characterized in that: the on off control end of converter is connected with the output switch parameter end of PLC.
3. the magneto-rheologic liquid brake elevator described in claim 1 starts brakes, it is characterized in that: the coil-end of catalyst is connected with the output switch parameter end of PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521092521.0U CN205367353U (en) | 2015-12-25 | 2015-12-25 | Magneto -rheological fluid brake elevator starts braking system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521092521.0U CN205367353U (en) | 2015-12-25 | 2015-12-25 | Magneto -rheological fluid brake elevator starts braking system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205367353U true CN205367353U (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521092521.0U Expired - Fee Related CN205367353U (en) | 2015-12-25 | 2015-12-25 | Magneto -rheological fluid brake elevator starts braking system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205367353U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417297A (en) * | 2015-12-25 | 2016-03-23 | 辽宁优力安机电设备有限公司 | Start and brake method and start and brake system for elevator with magnetorheological fluid brake |
-
2015
- 2015-12-25 CN CN201521092521.0U patent/CN205367353U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417297A (en) * | 2015-12-25 | 2016-03-23 | 辽宁优力安机电设备有限公司 | Start and brake method and start and brake system for elevator with magnetorheological fluid brake |
| CN105417297B (en) * | 2015-12-25 | 2018-08-07 | 辽宁优力安机电设备有限公司 | Magneto-rheologic liquid brake elevator starts braking method and starts braking system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160706 Termination date: 20211225 |