EP2669233A1 - Circuit de commande de freinage pour un frein actionné de manière électromagnétique et module d'entraînement - Google Patents

Circuit de commande de freinage pour un frein actionné de manière électromagnétique et module d'entraînement Download PDF

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Publication number
EP2669233A1
EP2669233A1 EP12004176.9A EP12004176A EP2669233A1 EP 2669233 A1 EP2669233 A1 EP 2669233A1 EP 12004176 A EP12004176 A EP 12004176A EP 2669233 A1 EP2669233 A1 EP 2669233A1
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EP
European Patent Office
Prior art keywords
electronic valve
brake
electronic
drive circuit
switching
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12004176.9A
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German (de)
English (en)
Inventor
Mathias Spannagel
Bernd Schnauffer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ziehl Abegg SE
Original Assignee
Ziehl Abegg SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ziehl Abegg SE filed Critical Ziehl Abegg SE
Priority to EP12004176.9A priority Critical patent/EP2669233A1/fr
Publication of EP2669233A1 publication Critical patent/EP2669233A1/fr
Withdrawn legal-status Critical Current

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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
    • B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
    • B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
    • B66B1/32—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on braking devices, e.g. acting on electrically controlled brakes
    • 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
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/24—Operating devices
    • B66D5/30—Operating devices electrical

Definitions

  • the invention relates to a brake drive circuit for an electromagnetically actuated brake, in particular for a cable lift brake, with a first pair of connection points, to which a first armature inductance of the brake for connecting a first actuating current path is connected or connected, with a rectifier bridge, which supplies the first actuating current path, with a first electronic valve, which is arranged in the first actuating current path and with which the first armature inductance between a current state and a deenergized state is switchable, and with a formed between the connection points of the first path freewheeling path in which a first diode in the reverse direction in Is arranged with respect to a rectified voltage provided by the rectifier bridge, and with which a stored energy in the first armature inductance is degraded when the first electronic valve is open r is.
  • Such a brake drive circuit is known from the US 5 153 389 A wherein the first diode is arranged with an ohmic resistor in parallel with an armature inductance to reduce the stored energy as quickly as possible after a shutdown of the armature inductance.
  • a rapid collapse of the brake can be achieved, resulting in an emergency shutdown short braking distances.
  • a rapid collapse of a brake is often associated with a strong noise, which is distracting in normal operation.
  • the invention further relates to a drive module, in particular for a cable lift, with an electromagnetically actuated brake.
  • the invention has for its object to provide a drive module in which the noise is as low as possible.
  • a brake drive circuit of the type described above that at least one electronic switch is arranged in the first freewheeling path.
  • the advantage here is that can be selected with the electronic switch, whether the first freewheeling path to the energy reduction of the armature inductance is available or not.
  • the first freewheeling path can thus be provided, for example, only in normal operation and can be interrupted for faster emergency shutdowns. This considerably reduces the noise during normal operation.
  • the first diode forms the largest internal resistance in the first freewheeling path. In this way it can be achieved that in the first freewheeling path the lowest possible ohmic losses occur, as a result of which an electromagnetic field of the armature inductance is reduced as slowly as possible and dissipated. This makes it possible to achieve a slow collapse of the brake, from which the lowest possible noise results.
  • a second pair of connection points is formed, to which a second armature inductance of the brake for forming a second actuating current path is connected or connected, wherein the second actuating current path is supplied from the rectifier bridge that a second electronic valve is formed, which is arranged in the second actuating current path and with which the second armature inductance between a current state and a de-energized state is switchable, that between the connection points of the second pair, a second free-wheeling path is formed, in which a second diode in the reverse direction with respect to the rectified voltage provided by the rectifier bridge is arranged and with which an energy stored in the second armature inductance is degradable when the second electronic valve is open, and that the second freewheeling path a is separable set up.
  • the advantage here is that the invention can also be used in brakes with separately controllable brake shoes and / or in two separately and thus, for example, offset in time controllable brakes.
  • the electronic switch of the first electronic valve and / or the second electronic Valve formed separately.
  • a drive unit for mutually time-delayed switching of the first electronic valve and the second electronic valve is set up.
  • the second freewheeling path passes through the electronic switch.
  • the first freewheeling path and the second freewheeling path can be simultaneously disconnected or released by a switching operation. This is particularly advantageous when the electronic switch is used in emergency shutdown and is used.
  • the first actuating current path and the second actuating current path can be separated simultaneously with the electronic switch.
  • the advantage here is that in addition an energization of the armature inductors can be switched off with the electronic switch.
  • the electronic switch is thus a dual function achievable, namely the switching off of the armature inductances on the one hand and the separation of the freewheeling paths for rapid engagement of the brake after the shutdown on the other.
  • the electronic switch is particularly well used for emergency braking, since in this case both effects are needed.
  • the connectable or connected first armature inductance is equipped with a arranged in parallel to her dissipative device.
  • the dissipative component may be formed by a varistor.
  • the advantage here is that an additional possibility is provided for reducing the energy stored in the first armature inductance.
  • the internal resistance of the dissipative component is preferably greater than the internal resistance of the first freewheeling path.
  • the connectable or connected second armature inductance is equipped with a dissipative component arranged in parallel to it.
  • the dissipative device may be formed for example as a varistor.
  • a switching input for connecting a safety chain of a lift is formed and that a monitoring device for monitoring a voltage at the switching input and for switching off a supply device of the first electronic valve and / or the second electronic valve at a voltage drop is set below a threshold.
  • a security chain a series circuit of safety-related switches, such as an elevator understood.
  • the electronic switch is associated with a diagnostic unit with which a switching state of the electronic switch is detected.
  • the advantage here is that a safety-related monitoring of the switching state of the electronic switch is possible.
  • the first electronic valve is assigned a diagnostic unit with which a switching state of the first electronic valve can be detected.
  • a safety-related monitoring of the switching state can be achieved or set up.
  • the second electronic valve is assigned a diagnostic unit with which a switching state of the second electronic valve can be detected.
  • the advantage here is that a safety-related monitoring of the second electronic valve can be set up.
  • the mentioned diagnostic units can be formed separately from each other or integrated into a common diagnostic unit.
  • the diagnostic unit or the diagnostic units of electronic switch, the first electronic valve and / or the second electronic valve each having a comparator circuit / have.
  • the advantage here is that with the comparator circuit, a voltage drop across the electronic switch, the first electronic valve or the second electronic valve is easily monitored, whereby the switching state of the electronic switch, the first electronic valve or the second electronic valve for safety-related processing easy is detectable.
  • individual or all of the mentioned electronic switches, that is the electronic switch and the electronic valves can be monitored.
  • the first electronic valve and / or the second electronic valve with pulse width modulation is / are controlled.
  • the advantage here is that with the electronic valves different currents are adjustable in the Betreliistsstrompfaden. This can be used to set a lower holding current after the brake is released and used as an actuating current to release the brake.
  • a switching relay is arranged on an input side of the rectifier bridge, with which a voltage applied to the input side AC voltage can be switched off.
  • the switching relay is set to be controllable by the diagnostic unit of at least one element from the group of electronic switch, first electronic valve and second electronic valve.
  • the brake drive circuit is integrated in a housing of a brake control module, wherein the connection points of the first pair and the second pair are formed as terminals.
  • the first electronic valve and / or the second electronic valve as a power transistor for example, as a MOSFET or IGBT, is formed / are.
  • the advantage here is that large currents for actuation of Ankerinduktterrorismen are switchable.
  • the electronic switch is designed as a power transistor, for example as a MOSFET or as an IGBT.
  • a MOSFET MOSFET
  • IGBT IGBT
  • An application of the described invention of possibly independent significance may provide a method for switching off a brake, in particular an elevator brake, in which, after switching off an armature inductance from the power supply, a stored in the armature inductance Energy is degraded at a detected fault on a dissipative device with an internal resistance and in which in normal operation, the energy is dissipated via an alternative or additional freewheeling path with respect to the dissipative device reduced internal resistance.
  • a brake drive circuit is designed according to the invention.
  • the advantage here is that a drive module is provided which causes a low noise on the brake and which meets the high safety requirements of elevator technology.
  • a motor drive is designed with a safe torque off function.
  • a safe torque function is understood to mean a safety-related function of the motor control, in which it is ensured that a faulty control of a power transistor of the motor control does not lead to the development of a torque at a controlled motor.
  • a driver of a power transistor of a frequency converter of the motor drive can be switched off in order to realize the Safe Torque Off function.
  • the advantage here is that the power transistor can be deactivated in the event of a fault, so that even a faulty switching state has no influence on the developed torque.
  • an input side of a power output stage of a frequency converter of the motor drive with an electronic switch is short-circuitable.
  • the advantage here is that an automatic braking of a controlled motor in generator operation is achievable. Switching noise can be avoided by using an electronic switch.
  • a designated as a whole with 1 drive module has a brake control module 2 and a brake 3, which is connectable to the brake control module 2.
  • a brake control module 2 which is connectable to the brake control module 2.
  • the brake 3 only the parts are shown schematically, which are required for the description of the brake drive circuit 4 of the brake control module 2.
  • the remaining components of the brake 3, which are executed in a conventional manner, are in Fig. 1 omitted for simplicity of illustration.
  • the brake drive circuit 4 has a first pair of connection points 5, 6, which in Fig. 1 are shown as terminals of the brake control module 2.
  • a first armature coil can be connected as a first armature inductance 7 of the brake 3 and also connected.
  • the first armature inductance 7 is thus separable from the brake drive circuit 4 at the connection points 5 and 6.
  • the first armature inductance 7 may be included by the brake drive circuit 4.
  • the first actuating current path 8 is supplied with a rectified voltage from a rectifier bridge 9 (V1).
  • the rectifier bridge 9 is fed from a network 10 with an AC voltage.
  • a first electronic valve 11 (S5) is arranged in the first actuating current path 8.
  • the first electronic valve 11 is designed as an IGBT or as a MOSFET.
  • the first armature inductance 7 can be switched between a current-fed state and a de-energized state.
  • the first armature inductance 7 adjustable brake shoe 22 of the brake 3 is released.
  • this brake shoe 22 has fallen in as soon as the energy stored in the first armature inductance 7 has been dissipated.
  • a first free-wheeling path 12 is formed in the brake drive circuit 4 between the connection points 5 and 6 of the first pair of connection points.
  • a first diode 13 (D2) is arranged in the first freewheeling path 12.
  • the first diode 13 is reverse-biased with respect to the rectified voltage provided by the rectifier bridge 9. When the first armature inductor 7 is energized by the rectifier bridge 9, therefore, no current flows through the first diode 13.
  • an electronic switch 14 (S2) is arranged in the first freewheeling path 12. Also, the electronic isolation valve 14 is formed as an IGBT or as a MOSFET.
  • a second pair of connection points 15 and 16 are formed, to which a second armature coil can be connected as a second armature inductance 17 and in Fig. 1 also connected.
  • a second brake shoe 23 of the brake 3 is adjustable.
  • the brake shoes 22 and 23 may belong to the same brake 3 or to different brakes.
  • connection points 15 and 16 of the second pair of connection points are formed as terminals of the brake control module 2.
  • a second actuating current path 18 is formed, which extends in sections together with the first actuating current path 8.
  • the second armature inductor 17 completes this second actuating current path 18.
  • a second electronic valve 19 (S4) is arranged in the second actuating current path 18. Also, the second electronic valve 19 is formed as an IGBT or as a MOSFET.
  • the second armature inductance 17 can be switched between a current-fed and a de-energized, ie de-energized state.
  • the second actuating current path 18 is also supplied from the rectifier bridge 9.
  • a second freewheeling path 20 is formed, which extends in sections together with the first freewheeling path 12.
  • a second diode 21 (D1) is arranged in the reverse direction with respect to the voltage provided by the rectifier bridge 9 in order to conduct current to be prevented when energized second armature inductance 17, ie when the second electronic valve 19 is open.
  • the energy in the second armature inductor 17 is only degradable via the second freewheeling path 20 when the electronic switch 14 is closed.
  • the first brake shoe 22 of the brake 3 only engages when the first electronic valve 11 is open and when the energy stored in the first armature inductance 7 is dissipated.
  • the second brake shoe 23 of the brake 3 only falls when the second electronic valve 19 is open and when the energy of the second armature inductance 17 has been dissipated.
  • a drive unit 24 (N2) is formed.
  • the drive unit 24 is set up so that the first electronic valve 11 can be shifted in time to the second electronic valve 19 and is switchable.
  • the first electronic valve 11 and the second electronic valve 19 can also be switched simultaneously.
  • the first brake shoe 22 is associated with a first release input 25, via which the first brake shoe 22 is releasable.
  • the second brake shoe 23 can be released via a second release input 26.
  • the electronic switch 14 has a dual function. Because with the electronic switch 14, in addition, the first actuating current path 8 and the second actuating current path 18 can be separated simultaneously. This is achieved in that the first actuating current path 8, the second actuating current path 18, the first free-wheeling path 12 and the second free-wheeling path 20 are jointly guided in a section in which the electronic switch 14 is arranged.
  • the first armature inductance 7 is equipped with a first dissipative component 27 (R1) which is arranged in parallel to the first armature inductance 7.
  • the first dissipative component 27 has an internal resistance which is greater than the internal resistance of the first freewheeling path 12.
  • the first dissipative component 27 is designed as a varistor.
  • the use of a varistor has the advantage that, on the one hand, no current flows when the first armature inductor 7 is energized via the first dissipative component 27, and, on the other hand, no current flows through the first dissipative component 27 in the deenergised armature inductance 7 for energy dissipation, as long as the electronic Switch 14 is closed.
  • the dissipative component 27, in this case the varistor R1 protects the winding of the first armature inductance 7 and of the first electronic valve 11, that is to say of the power semiconductor S5, and of the electronic isolation valve 14, ie of the power semiconductor S2, against overvoltage.
  • the brake 3 is equipped with a second dissipative component 28 (R2).
  • the second dissipative component 28 enables a rapid energy reduction of the stored energy of the second armature inductance 17 when the switch 14 is open in the manner already described for the first armature inductance 7.
  • the second dissipative component 28 is identical to the first dissipative component 27 or at least likewise designed as a varistor.
  • the brake control module 2 and the brake control circuit 4 have a switching input 29, via which a safety chain 30 of an elevator can be connected and in Fig. 1 connected.
  • the safety chain 30 has in a conventional manner several safety switches not shown here of an elevator.
  • a monitoring device 31 (N1) is set up for monitoring the voltage applied to the switching input 29. As soon as a drop of this voltage below a predetermined threshold value is detected by the monitoring device 31, supply devices 35 of the first electronic valve 11, the second electronic valve 19 and the electronic switch 14 are not switched off. These supply devices 35 comprise, in a manner known per se, drivers of power transistors which are deactivated by the switch-off.
  • the comparator therefore detects the switching state of the relevant electronic switching element.
  • a switching relay 33 is arranged, with which the AC voltage of the network 10 on an input side 32 of the rectifier bridge 9 is separable.
  • the mentioned diagnostic units 34 of the electronic switch 14, the first electronic valve 11 and the second electronic valve 19 control the mentioned switching relay in order to disconnect the network 10 from the rectifier bridge 9 in the event of an error.
  • the drive unit 24 is set up to drive the first electronic valve 11 and the second electronic valve 19 with pulse width modulation.
  • the pulse width modulation is controlled so that at a switch-on of the first electronic valve 11 and / or the second electronic valve 19 initially a higher current flow than the actuating current through the respective electronic valve 11, 19 is generated. Later, when the brake shoes 22 and 23 are released and only need to be held, on the other hand, a reduced current flow is generated as a holding current through the actuating current paths 8, 18.
  • the drive module 1 further has a motor control, not shown, with which a Safe Torque Off function is realized.
  • a motor control not shown, with which a Safe Torque Off function is realized.
  • the drivers of the power transistors of a frequency converter of the motor control in case of failure can be switched off.
  • an input side of the power output stage is additionally short-circuitable with an electronic switch in order to short-circuit the windings of the controlled motor.
  • the brake drive circuit 4 with a first pair of connection points 5, 6, to which a first armature inductance 7 of an electromagnetically actuated brake 3 for completing a first actuating current path 8 of the brake drive circuit 4 is connected or connected, wherein the first actuating current path 8 is supplied from a rectifier bridge 9 and a first electronic valve 11 for switching off the first armature inductance 7 it is proposed to arrange a first diode 13 and an electronic switch 14 in a first freewheeling path 12, via which a stored energy of the first armature inductance 7 is degradable.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)
EP12004176.9A 2012-05-31 2012-05-31 Circuit de commande de freinage pour un frein actionné de manière électromagnétique et module d'entraînement Withdrawn EP2669233A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12004176.9A EP2669233A1 (fr) 2012-05-31 2012-05-31 Circuit de commande de freinage pour un frein actionné de manière électromagnétique et module d'entraînement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP12004176.9A EP2669233A1 (fr) 2012-05-31 2012-05-31 Circuit de commande de freinage pour un frein actionné de manière électromagnétique et module d'entraînement

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EP2669233A1 true EP2669233A1 (fr) 2013-12-04

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EP12004176.9A Withdrawn EP2669233A1 (fr) 2012-05-31 2012-05-31 Circuit de commande de freinage pour un frein actionné de manière électromagnétique et module d'entraînement

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104210982A (zh) * 2014-08-22 2014-12-17 上海吉亿电机有限公司 一种电梯抱闸控制系统及控制方法
CN105515453B (zh) * 2016-03-02 2018-07-03 珠海格力电器股份有限公司 一种伺服驱动器刹车控制电路

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070272491A1 (en) * 2003-11-12 2007-11-29 Ari Kattainen Elevator Brake and Brake Control Circuit
US20090255764A1 (en) * 2006-07-27 2009-10-15 Takaharu Ueda Elevator device
US20110278099A1 (en) * 2009-03-05 2011-11-17 Ari Kattainen Elevator system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070272491A1 (en) * 2003-11-12 2007-11-29 Ari Kattainen Elevator Brake and Brake Control Circuit
US20090255764A1 (en) * 2006-07-27 2009-10-15 Takaharu Ueda Elevator device
US20110278099A1 (en) * 2009-03-05 2011-11-17 Ari Kattainen Elevator system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104210982A (zh) * 2014-08-22 2014-12-17 上海吉亿电机有限公司 一种电梯抱闸控制系统及控制方法
CN105515453B (zh) * 2016-03-02 2018-07-03 珠海格力电器股份有限公司 一种伺服驱动器刹车控制电路

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