JP2005206325A - Elevator controlling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an elevator controlling device capable of effectively solving contact failure of an electromagnetic contactor. <P>SOLUTION: The elevator controlling device comprises a brake controlling device 13 having the electromagnetic contactor 14 for supplying power between terminals of a brake coil 9, and an elevator operation controlling microcomputer 11 for controlling the operation of the elevator and detecting the contact failure of a contact of the electromagnetic contactor 14. When detecting the contact failure of the electromagnetic contactor 14, the elevator operation controlling microcomputer 11 prevents a brake controlling device 13 from releasing a brake 8 and periodically turning on/off the electromagnetic contactor 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an elevator control device that controls a brake for braking an elevator hoisting motor.

  A conventional elevator control device includes a brake control device that brakes a hoisting motor for winding an elevator car and controls the release of a brake that holds the position of the car. This brake control device has an electromagnetic contactor that supplies and controls power between terminals of a brake coil, receives a brake drive control signal from a drive control microcomputer that controls the drive of the hoisting motor, and receives a current for driving the brake. Is applied to the brake coil to apply a voltage between the terminals of the brake coil. The brake coil releases a brake that brakes the hoisting motor by voltage control.

When there is a call from a passenger, a drive command for controlling the operation of the elevator is input to the drive control microcomputer. And a drive control microcomputer outputs a drive signal and a brake drive control signal based on this drive command. The hoisting motor is driven based on the drive signal, and the operation of the elevator car is controlled by the brake control device controlling and releasing the brake based on the brake drive control signal.
As described above, operation services to each floor are performed in response to calls from passengers (see, for example, Patent Document 1).

JP-A-9-272664 (page 3-5, FIG. 5)

  However, in a conventional elevator control device, for example, if the contact of a magnetic contactor is rough or if a contact failure occurs due to dust or the like being attached to the contact, power is not correctly supplied from the electromagnetic contactor to the brake coil, and the brake There was a problem that the release operation was hindered and the elevator could not operate normally.

The present invention is intended to solve the above-described problems, and even when the contact of the electromagnetic contactor is rough, or contact failure occurs due to dust adhering to the contact. It is an object of the present invention to obtain an elevator control device that can effectively eliminate such roughness and contact failure and maintain normal operation of the elevator.

  An elevator control apparatus according to the present invention includes a brake control apparatus having an electromagnetic contactor for controlling a current flowing in a brake coil of a brake for braking an elevator hoisting motor, a hoisting motor, and brake control. A drive control microcomputer that outputs a signal to the device to control the brake, and an elevator operation that outputs a signal to the brake control device and the drive control microcomputer to control the operation of the elevator and detect a contact failure of the contact of the electromagnetic contactor The elevator operation control microcomputer includes a control microcomputer, and when the contact failure of the electromagnetic contactor is detected, the elevator operation control microcomputer prevents the brake control device from releasing the brake and periodically drives the electromagnetic contactor.

  According to the elevator control device of the present invention, when contact failure of the electromagnetic contactor is detected, the brake control device prevents the brake from being released and periodically drives the electromagnetic contactor. Even if a contact failure occurs due to a rough surface or dust on the contacts, the rough contact and the contact failure can be effectively eliminated and normal operation of the elevator can be maintained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or equivalent members and parts will be described with the same reference numerals.

Embodiment 1 FIG.
An elevator control apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings. 1 is a block diagram showing an elevator apparatus including an elevator control apparatus according to Embodiment 1 of the present invention.

In FIG. 1, an elevator apparatus includes an elevator car 1 for carrying passengers, a balance weight 3 connected to the elevator car 1 by a main rope 2, a sheave 4 around which the main rope 2 is wound, and the sheave. 4, a hoisting motor 5 for transmitting power to the elevator car 1 to wind up the elevator car 1, an electric motor control device 6 for controlling the driving of the hoisting motor 5, and an electric motor control device 6 for driving the hoisting motor 5 A power supply (three-phase AC power supply) 7a for supplying power is provided.
In addition, the elevator apparatus includes a brake 8 for braking the hoisting motor, a brake coil 9 that is excited when current flows to release the brake 8, and a power source 7b (for supplying current to the brake coil 9). A three-phase AC power source) and an elevator controller 10 that outputs a signal for controlling the drive of the hoisting motor to the motor controller 6 and controls the voltage applied to the brake coil 9 to operate the elevator. ing.

The brake 8 is configured such that a brake shoe is sandwiched from right and left by a brake wheel provided on an output shaft of the hoisting electric motor 5. The braking force of the brake 8 is given by the force of the spring, and when the current is passed through the brake coil 9 and excited, the brake shoe is separated from the braking wheel against the spring force and the brake 8 is released. Yes.

  The elevator control device 10 controls the hoisting motor 5 by outputting a drive signal to the electric motor control device 6 based on an elevator operation control microcomputer 11 that controls the operation of the elevator and a drive command of the elevator operation control microcomputer 11. A drive control microcomputer 12 that outputs a brake drive control signal for controlling the release of the brake 8 and a brake control device 13 that controls the voltage applied to the brake coil 9 based on the brake drive control signal are provided. ing.

The brake control device 13 has an electromagnetic contactor 14 for controlling the supply of current from the power source 7 b between the terminals of the brake coil 9. The electromagnetic contactor 14 can open and close based on a signal input to the brake control device 13 to control a current flowing through the brake coil 9, that is, to control a voltage applied between terminals of the brake coil 9. It has become. Further, the brake control device 13 can control the voltage applied between the terminals of the brake coil 9 without depending on the opening / closing operation of the electromagnetic contactor 14.
The elevator operation control microcomputer 11 can detect a contact failure of the contact of the electromagnetic contactor 14.

  FIG. 2 is a diagram illustrating a configuration of the elevator control device 10 of FIG. 1. As shown in the figure, the elevator operation control microcomputer 11 determines the drive pattern of the electromagnetic contactor 14 based on the contact failure detection means 15 for detecting the contact failure of the electromagnetic contactor 14 and the output signal of the contact failure detection means 15. A contactor drive pattern generating means 16 for outputting a prescribed signal, and a brake drive command for driving the magnetic contactor 14 by outputting a signal to the drive control microcomputer 12 and the brake control device 13 based on the signal for defining the drive pattern. And means 17.

  Here, the operation in which the contact failure detection means 15 detects the contact failure of the electromagnetic contactor 14 will be briefly described.

  First, a drive command for normal driving is output from the brake drive command means 17 to the drive control microcomputer 12 and the contact failure detection means 15. Based on this drive command, the drive control microcomputer 12 outputs a brake drive control signal to the brake control device 13.

  When there is no response from the brake control device 13 within a certain period even though the contact failure detection means 15 receives the drive command (when the brake control device 13 does not drive even if it receives a brake drive control signal) The contact failure is detected on the assumption that a contact failure has occurred in the electromagnetic contactor 14. The contact failure detection means 15 outputs a contact failure detection signal when the contact failure of the electromagnetic contactor 14 is detected.

  Further, when the contact failure detection means 15 receives a drive command and there is a response from the brake control device 13 within a certain time (the brake control device 13 is driven by receiving a brake drive control signal), the electromagnetic If the contact of the contactor 14 is normal, the contact failure is not detected.

  Next, various drive patterns of the electromagnetic contactor 14 defined by the output signal of the contactor drive pattern generating means 16 are shown in FIG.

FIG. 3A shows a normal drive pattern that is executed in response to a passenger call or the like when the contact failure of the electromagnetic contactor 14 is not detected. During the ON period of the drive pattern, the electromagnetic contactor 14 is closed and a current flows through the brake coil 9 to excite it, and the brake 8 is released.
Further, during the drive pattern OFF period, the electromagnetic contactor 14 is opened, the current is cut off, the brake coil 9 is demagnetized, and the brake 8 is not released.

  FIGS. 3B and 3C show periodic drive patterns that are executed in order to eliminate the contact failure of the electromagnetic contactor 14 when the contact failure of the electromagnetic contactor 14 is detected. As shown in the figure, the periodic drive pattern is defined by a period in which the drive of the electromagnetic contactor 14 is performed and a period in which the drive of the electromagnetic contactor 14 is stopped in an on / off pattern having a constant period. A plurality of periodic drive patterns are set, and when a contact failure is detected, all of these periodic drive patterns are set to be executed. The time during which the magnetic contactor 14 is turned on and off during periodic driving is about 200 msec, at which the electromagnetic contactor 14 can sufficiently open and close. The periodic drive pattern is set to end when it is performed for a specified time.

  Next, the control operation for eliminating the contact failure of the elevator control apparatus having the above-described configuration will be described based on the flowchart of FIG.

  First, it is confirmed by the contact failure detection means 15 whether the contact failure of the electromagnetic contactor 14 is detected (step S1). The contact failure of the electromagnetic contactor 14 is detected by the contact detection means 15 based on the presence or absence of a response output from the brake control device 13 in the detection operation described above.

  If the contact failure of the electromagnetic contactor 14 is not detected in step S1, the electromagnetic contactor 14 is normally driven and normal brake drive control is performed (step S7).

  When the contact failure of the electromagnetic contactor 14 is detected, it is confirmed whether or not the periodic drive end flag is ON (step S2).

  When the periodic drive end flag is ON, that is, when the electromagnetic contactor 14 has already been periodically driven based on a signal that defines the periodic drive pattern, the elevator operation control microcomputer 11 performs electromagnetic contact even by periodic drive. It is determined that the contact failure of the device 14 has not been eliminated, and the elevator is stopped (step S3).

  When the periodic drive end flag is OFF, a brake driving signal that defines a periodic drive pattern for the contactor drive pattern generation means 16 to periodically turn on and off the electromagnetic contactor 14 based on the contact failure detection signal. Output to the command means 17. The brake drive command means 17 periodically drives the electromagnetic contactor 14 based on a signal that defines this drive pattern (step S4). The periodic drive of the magnetic contactor 14 is executed with a periodic drive pattern as shown in FIGS. 3 (B) and 3 (C).

When the electromagnetic contactor 14 is periodically driven, the brake drive command means 17 interrupts the drive command to the drive control microcomputer 12.
When this drive command is interrupted, the brake control device 13 prohibits voltage application between the terminals of the brake coil 9. Thereby, even if the electromagnetic contactor 14 is driven, the brake coil 9 is not excited, the release of the brake 8 is prevented, and the braking state is maintained.
Therefore, while the electromagnetic contactor 14 is periodically driven, the elevator motor 5 is not driven because the hoisting motor 5 is not driven.

  Next, it is confirmed whether or not all predetermined periodic drive patterns have been executed (step S5). If all the predetermined periodic drive patterns are not executed, the process returns to step 4 to execute the periodic drive.

  If all the predetermined periodic drive patterns have been executed, the periodic drive end flag is turned ON (step S6).

  After the periodic drive end flag is turned ON in step 6, normal driving of the electromagnetic contactor 14 is executed (step S7). The normal drive of the electromagnetic contactor 14 is executed in a normal drive pattern as shown in FIG.

  As described above, according to the elevator control device of the first embodiment, when the contact failure of the electromagnetic contactor 14 is detected, the electromagnetic contactor 14 is periodically turned on while the release of the brake 8 is prevented. -By turning off and rubbing the contacts, vibrations caused by rough contact or adhesion of dust can be effectively eliminated.

  If there is no response from the brake control device 13 for a certain period in spite of the output of the signal for normally driving the brake 8, the contact failure detection means 15 indicates that the contact of the electromagnetic contactor 14 has a contact failure. Since it detects, contact failure detection can be made automatic.

  In addition, even if the electromagnetic contactor 14 is periodically driven based on the periodic drive pattern, if it is detected that the contact of the electromagnetic contactor 14 is in poor contact, the drive of the elevator is stopped to drive the brake. Occurrence of malfunctions in elevator operation caused by defects can be prevented.

1 is a block diagram illustrating an elevator apparatus including an elevator control apparatus according to Embodiment 1 of the present invention. It is a block diagram which shows the structure of the control apparatus of the elevator of FIG. It is a figure which shows the drive pattern of the control action of the control apparatus of the elevator of FIG. It is a flowchart which shows the brake control drive method by the control apparatus of the elevator of FIG.

Explanation of symbols

  1 elevator car, 2 main rope, 3 counterweights, 4 sheaves, 5 hoisting motor, 6 motor controller, 7a, b power supply, 8 brake, 9 brake coil, 10 elevator controller, 11 elevator operation control microcomputer, 12 Drive control microcomputer, 13 brake control device, 14 electromagnetic contactor, 15 contact failure detection means, 16 contactor drive pattern generation means, 17 brake drive command means.

Claims (5)

A brake control device having an electromagnetic contactor for controlling a current flowing in a brake coil of a brake for braking an elevator hoisting motor;
A drive control microcomputer that controls the hoisting motor and outputs a signal to the brake control device to control the brake;
Elevator operation control microcomputer for detecting a contact failure of the contact of the electromagnetic contactor while controlling the operation of the elevator by outputting a signal to the brake control device and the drive control microcomputer,
The elevator operation control microcomputer, when detecting a contact failure of the electromagnetic contactor, causes the brake control device to prevent the release of the brake and periodically drives the electromagnetic contactor. Control device. The elevator operation control microcomputer detects a contact failure of the contact of the electromagnetic contactor, and outputs a contact failure detection signal to output a contact failure detection signal,
Based on the contact failure detection signal, contactor drive pattern generating means for outputting a signal defining a periodic drive pattern for periodically turning on and off the electromagnetic contactor;
And a brake drive command means for outputting a signal for preventing the release of the brake and outputting a signal for periodically driving the electromagnetic contactor based on a signal defining the periodic drive pattern. Item 2. The elevator control device according to Item 1.   After the signal for driving the electromagnetic contactor is output from the brake drive command means, the contact failure detection means, when a response from the brake control device is not detected for a certain period of time, The elevator control device according to claim 2, wherein the contact is determined to be a contact failure, and the contact failure detection signal is output. The elevator operation control microcomputer outputs a signal to the drive control microcomputer when the contact failure detection signal is detected after the electromagnetic contactor is periodically driven based on a signal defining the periodic drive pattern. The elevator control apparatus according to claim 2 or 3, wherein the drive of the elevator is stopped.   5. The brake control device according to claim 1, wherein when the contact failure of the electromagnetic contactor is detected, voltage application between the terminals of the brake coil is prohibited to prevent the release of the brake. The elevator control device according to any one of the above.

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