JP2006160384A - Control device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent passengers from being confined in a car even if one hoist or a driving device thereof gets out of order in an elevator apparatus for elevating one car by two or more hoists. <P>SOLUTION: In the elevator apparatus for elevating one car 11 with two or more hoists 104, 204, when the elevator apparatus cannot be normally controlled due to failure of one hoist 104, the operating condition of the elevator apparatus is maintained by the other normal hoist 204 to prevent the occurrence of such a failure that the passengers are confined in the car. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an elevator control device, and more particularly to an elevator control device driven by a plurality of hoisting machines.

  In a conventional elevator drive device, a main rope for suspending a car and a counterweight is wound around the sheave, and the sheave is driven by a hoist while balancing the car and the counterweight. Elevating operation is performed. In particular, during acceleration / deceleration operation, an inertial force due to the car and the counterweight influences, so that a larger driving force is required than during normal operation.

  In order to make it possible to use a drive unit that satisfies the required power during acceleration / deceleration, it is necessary to develop a large capacity hoisting machine, especially for high speed and large capacity elevators. An elevator drive system is used in which the elevator is driven and the hoisting machine and the control device are miniaturized. (For example, refer to Patent Document 1).

  Moreover, when two sets of inverter devices are provided as a drive control device for a hoisting machine and one of them becomes inoperable, the drive motor is changed by changing the connection of the drive motor connected to the normal inverter device There is also an elevator drive device that continues the operation. (For example, refer to Patent Document 2).

  In such an elevator apparatus, since it operates with the torque of a plurality of hoisting machines, if for some reason a large load is applied only to a specific hoisting machine, the hoisting machine is overloaded. The operation is detected, and the safety circuit is normally activated to stop the operation.

JP-A-8-26606 JP-A-8-324901

  A conventional elevator control device is configured as described above. In the case of Patent Document 1, a plurality of hoisting machines are driven and controlled by a plurality of inverters. This is a device that focuses on preventing operation in advance, and there is a problem that it is necessary to separately examine a countermeasure when one of the hoisting machines or the inverter that is the driving device fails.

  Moreover, in the case of patent document 2, although the control apparatus regarding the driving | operation when one side of an inverter apparatus becomes inoperable is disclosed, it is necessary to consider separately about the driving | operation when a winding machine fails. There was a problem.

  The present invention has been made to solve the above-described problems, and even if one of the plurality of hoisting machines or its driving device breaks down, the passenger is confined in the car. It is an object of the present invention to provide an elevator control device that can prevent this from happening.

  The elevator control device according to the present invention is an elevator device that lifts and lowers one car with a plurality of hoisting machines. When the elevator device cannot be normally controlled due to a failure of one hoisting machine, The normal hoisting machine maintains the operation state of the elevator apparatus and prevents the passenger from being trapped in the car.

  Since the elevator control device according to the present invention is configured as described above, even when one hoisting machine fails in an elevator in which the car is driven by a plurality of hoisting machines, The occurrence of confinement faults can be minimized.

Embodiment 1 FIG.
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram illustrating a configuration of an elevator control device according to Embodiment 1. In FIG.

  As shown in this figure, the alternating current is rectified into a direct current by a converter 102 connected to a three-phase power source 101, smoothed by a smoothing capacitor 107, and supplied to an inverter 103. Furthermore, it is converted into alternating current by the inverter 103 and applied to the first hoisting machine 104 including a driving motor (not shown). The current flowing through the motor of the first hoisting machine 104 is detected by the current detector 106 and fed back to the motor 1 control unit 108, and the rotation speed of the motor of the first hoisting machine 104 is detected by the rotation detector 105. It is detected and fed back to the motor 1 controller 108 in the same manner.

  The motor 1 control unit 108 receives each feedback signal described above and outputs a control signal to the inverter 103 to control the operation of the first hoisting machine 104 along the control signal.

  Similarly, alternating current is rectified into direct current by a converter 202 connected to a three-phase power supply 201, converted into alternating current by an inverter 203, and applied to a second hoisting machine 204 including a drive motor (not shown). The The current flowing through the motor of the second hoisting machine 204 is detected by the current detector 206 and fed back to the motor 2 control unit 208, and the rotational speed of the motor of the second hoisting machine 204 is detected by the rotation detector 205. It is detected and fed back to the motor 2 control unit 208 in the same manner.

  The motor 2 control unit 208 receives each feedback signal described above and outputs a control signal to the inverter 203 to control the operation of the second hoisting machine 204 along the control signal.

  The integrated command unit 301 comprehensively controls the motor 1 control city 108 and the motor 2 control unit 208, and outputs speed signals and torque signals for controlling the motors of the first and second hoisting machines 104 and 204. In addition, it receives operation state signals from the motor 1 control unit 108 and the motor 2 control unit 208, and monitors whether or not the operation is accurately controlled.

  The overload detection device 302 is a device that detects an overload of the motor 1 control unit 108 and the motor 2 control unit 208, and monitors respective torque signals to the motor 1 control unit 108 and the motor 2 control unit 208 to perform normal operation. The overload detection detection level set based on the motor torque command value that is considered necessary for the motor 1 is compared with the respective torque signals to the motor 1 control unit 108 and the motor 2 control unit 208. When the signal becomes large, it is detected as an overload, and an elevator stop command is output to the integrated command unit 301.

  The car 11 is hung on the counter 16 by a rope 15 and lifted by a first hoisting machine 104 and a second hoisting machine 204. There is also a basket sloping wheel 14 for passing the rope 15 and a sloping wheel 12 at the top of the hoistway. Reference numeral 13 denotes a deflector for hanging the counter 16.

Next, the operation principle of the first embodiment will be described based on the flowchart of FIG.
During normal operation, a speed and a motor torque command value for optimal operation of the car 11 are output from the integrated command unit 301 to the motor 1 control unit 108 and the motor 2 control unit 208.

  The overload detection device 302 monitors the respective motor torque command values to the motor 1 control unit 108 and the motor 2 control unit 208, and outputs an elevator stop command to the integrated command unit 301 when an overload is detected. .

  Now, assuming that the motor 1 control unit 108 detects a failure in the first hoisting machine 104, the motor 1 control unit 108 commands the integrated command unit 301 to generate a failure and transmits it to the integrated command unit 301 in step S1. The The integrated command unit 301 makes the following determination. That is, it is checked in step S2 whether a brake failure has occurred.

If the brake has failed, the rope 15 will be worn on the first hoisting machine 104 if the second hoisting machine 204 continues to operate, which is dangerous. The machine 204 also makes an emergency stop, stops the elevator by urgently stopping the elevator operation. Next, in step S4,
(1) The brake of the first hoisting machine 104 cannot be sucked by the emergency brake operating device, or
(2) Check whether the brake of the first hoisting machine 104 can be sucked by the emergency brake operation device.

  In the case of (1), since it is necessary to manually release the brake of the first hoisting machine 104 in order to move the car 11, automatic operation is impossible. For this reason, it is necessary to rescue the passenger in the car 11 by the maintenance staff in step S5. However, if there is a car position in a state where the door can be opened, the door is opened to prevent passengers from being trapped in the car.

  In the case of (2), a floor that can be rescued is set up in step S6 when the car load is below the counter balance, and down if the car load is above the counter balance. The operation of the second hoisting machine 204 is determined by determining which of the cases.

(3) When the torque of the second hoisting machine 204 motor necessary for driving to a rescueable floor can be generated and overload detection is not performed.
(4) The case where the torque of the motor for the second hoisting machine 204 necessary for driving to the rescueable floor can be generated and overload is detected.
(5) When the torque of the second hoisting machine 204 motor necessary for driving to the rescueable floor cannot be generated.

In the case of (3), the vehicle is restarted in step S8 and normally travels to the floor where it can be rescued.
In the case of (4), restarting at step S9, the overload detection level of the overload detection device 302 is changed to the maximum torque command value of the second hoisting machine 204 motor, and the elevator is operated. Travel to the floor where the overload detection device 302 can be rescued without operating.
Further, in the case of (5), since the elevator rescue operation cannot be performed only by the motor of the second hoisting machine 204, the restart is disabled in step S10 to prevent danger.

  If no brake failure has occurred in step S2, the power of the motor for the first hoisting machine 104 is shut off in step S11, but power is supplied only to the brake portion of the first hoisting machine 104, and the car Continue driving without stopping. In step S12, a determination is made as to which of the following cases is based on the load in the car at that time.

(6) When the traveling is continued, the torque of the second hoisting machine 204 motor necessary for the operation can be generated and the overload is not detected.
(7) When the traveling is continued, the torque of the second hoisting machine 204 motor necessary for the operation can be generated, and the overload is detected.
(8) The case where the torque of the second hoisting machine 204 motor necessary for driving cannot be generated if the running is continued.

In the case of (6), the operation is continued as it is in step S13, and the vehicle normally travels to the destination floor.
In the case of (7), the operation is continued as it is in step S14, but the overload detection level of the overload detection device 302 is changed to the maximum torque command value of the second hoisting machine 204 motor, and the elevator is operated. Even if the overload detection device 302 does not operate, the vehicle travels to a floor that can be rescued.
In the case of (8), the elevator is temporarily stopped in step S15 to stop the car. Next, in step S16, a floor that can be rescued is set upward when the car load is less than the counterbalance, and when the car load is greater than or equal to the counterbalance, a floor that can be rescued is set. In step S17, By determining whether or not there is, the operation of the second hoisting machine 204 is determined.

(9) When the torque of the motor for the second hoisting machine 204 necessary for driving to the rescueable floor can be generated and overload detection is not performed.
(10) The case where the torque of the motor for the second hoisting machine 204 necessary for driving to the rescueable floor can be generated and overload is detected.
(11) When the torque of the motor for the second hoisting machine 204 necessary for driving to a rescueable floor cannot be generated.

In the case of (9), the vehicle is restarted in step S18 and normally travels to the floor where it can be rescued.
In the case of (10), restarting at step S19, the overload detection level of the overload detection device 302 is changed to the maximum torque command value of the second hoisting machine 204 motor, and the elevator is operated. Travel to the floor where the overload detection device 302 can be rescued without operating.
Further, in the case of (11), since the elevator rescue operation cannot be performed with only the second hoisting machine 204 motor, the restart is disabled in step S20 to prevent danger. For this reason, it is necessary to rescue passengers in the car by maintenance personnel. However, if there is a car position in a state where the door can be opened, the door is opened to prevent passengers from being trapped in the car.

  In addition, when it is necessary to prioritize the protection of the equipment over the operation for preventing the confinement of the passengers in the elevator, it may be confined in the car regardless of the above conditions.

In the above description, the case of a combination of two hoisting machines has been shown, but even if the hoisting machine is an elevator composed of three or more hoisting machines, one of the hoisting machines has failed. In this case, it goes without saying that the present invention is also effective when operating the elevator car based on the case classification indicated by the above-described conditions.
The same applies to the position of the hoisting machine at the position of the deflector 12 or 13 or 14.

It is the schematic which shows the structure of the control apparatus of the elevator by Embodiment 1 of this invention. 3 is a flowchart illustrating an operation principle when a hoisting machine fails in the first embodiment.

Explanation of symbols

11 basket, 12, 13, 14 baffle, 15 rope, 16 counter,
101, 201 three-phase power supply, 102, 202 converter, 103, 203 inverter, 104, 204 hoisting machine, 105, 205 rotation detector, 106, 206 current detector, 108, 208 motor control unit, 301 integrated control unit, 302 Overload detection device.

Claims (3)

  In an elevator apparatus that moves up and down one car with a plurality of hoisting machines, when the elevator apparatus cannot be normally controlled due to a failure of one hoisting machine, the elevator apparatus is operated by another normal hoisting machine. An elevator control device characterized by maintaining a driving state of the vehicle and preventing occurrence of a confinement failure in a passenger car.   In an elevator device that raises and lowers one car with a plurality of hoisting machines, when the elevator device cannot be controlled normally due to a failure of the control device of one hoisting machine, other normal hoisting machines An elevator control device characterized in that the operation state of the elevator device is maintained by the control device to prevent the occurrence of a confinement failure in a passenger car.   Even if the operation of the elevator device by another normal hoisting machine or control device detects an overload during normal operation and stops the elevator operation, the control device changes the overload detection level. The elevator control device according to claim 1 or 2, wherein operation of the elevator device is allowed and temporary overload operation is performed to prevent a passenger from being trapped in the car.

Images