JP5504710B2 - Man conveyor control device - Google Patents

Description

  The present invention relates to a control device for a man conveyor.

  A man conveyor control device has been proposed that includes a regenerative resistor that consumes regenerative power during motor regenerative operation. Thereby, even if the regenerative electric power by a passenger load is large, the DC bus voltage in the inverter which drives a motor does not become excessive, and an abnormality is not detected. For this reason, the man conveyor can be slowly stopped at a target deceleration (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 7-252073

  However, the thing of patent document 1 had the problem that a big regenerative resistor was required in order to implement | achieve the gentle stop of a man conveyor, and size reduction of an apparatus was difficult.

  The present invention has been made to solve the above-described problems, and an object thereof is to provide a control device for a man conveyor that can realize a gentle stop of the man conveyor with a small device.

The control device for the man conveyor according to the present invention includes a drive control means for controlling the speed of a motor for driving the man conveyor using an inverter, a braking control means for controlling an operation of a brake for braking the man conveyor, Monitor means for monitoring the DC bus voltage of the inverter, and is provided for controlling the drive control means and the brake control means, and the monitor means monitors when the drive control means is decelerating the motor. When the DC bus voltage is not less than a preset monitoring value, the drive control means decelerates the motor so that the deceleration of the man conveyor is maintained at the target deceleration. Thus, the brake control means is provided with a judgment means for operating the brake.

  According to the present invention, it is possible to realize a gentle stop of the man conveyor with a small device.

It is a block diagram of the man conveyor in which the control apparatus of the man conveyor in Embodiment 1 of this invention is utilized. It is a timing chart for demonstrating the slow stop method of the man conveyor by the control apparatus of the man conveyor in Embodiment 1 of this invention. It is a block diagram of the man conveyor in which the control apparatus of the man conveyor in Embodiment 2 of this invention is utilized. It is a timing chart for demonstrating the slow stop method of the man conveyor by the control apparatus of the man conveyor in Embodiment 2 of this invention. It is a timing chart for demonstrating the stop method at the time of the inverter failure of the man conveyor by the control apparatus of the man conveyor in Embodiment 2 of this invention.

  A mode for carrying out the invention will be described with reference to the accompanying drawings. In addition, in each figure, the same code | symbol is attached | subjected to the part which is the same or it corresponds, The duplication description is simplified or abbreviate | omitted suitably.

Embodiment 1 FIG.
In general, the man conveyor is provided across the floors of a building, for example. That is, the lower entrance of the man conveyor is connected to the lower floor of the adjacent floor. On the other hand, the upper entrance of the man conveyor is connected to the upper floor between adjacent floors.

  Steps are provided endlessly between the lower entrance and the upper entrance. There are balustrades on both sides of this step. This balustrade is provided with an endless moving rail. Then, the step and the moving handrail circulate while being synchronized.

  In the man conveyor having such a configuration, the passenger gets on the step from one of the lower entrance and the upper entrance and grabs the moving handrail as appropriate. Thereby, the passenger can move safely to the other of the lower entrance and the upper entrance.

  The operation of the man conveyor and the stop of the operation are controlled by a control device. This control device stops the man conveyor when any abnormality occurs. At this time, there may be a passenger on the step. For this reason, the control device slowly stops the man conveyor at a preset target deceleration. Hereinafter, the control device of the present embodiment will be described in more detail.

FIG. 1 is a block diagram of a man conveyor in which the man conveyor control device according to the first embodiment of the present invention is used.
In FIG. 1, 1 is a motor. The motor 1 has a function of driving a man conveyor. 2 is a brake. The brake 2 has a function of braking the man conveyor. 3 is a control device. The control device 3 includes drive control means 4, braking control means 5, DC bus voltage monitoring means 6, and determination means 7.

  The drive control means 4 has a function of controlling the speed of the motor 1 using an inverter. The braking control means 5 has a function of controlling the braking torque of the brake 2 by a PWM method or a current reducing method. The DC bus voltage monitoring means 6 has a function of monitoring the DC bus voltage in the inverter applied to the drive control means 4. The determination means 7 has a function of giving an operation instruction to the drive control means 4 and the brake control means 5 to control them.

  In the first embodiment, the determination unit 7 controls the drive control unit 4 and the braking control unit 5 so as to reduce the regenerative power generated when the man conveyor decelerates during the descent operation of the man conveyor. It has a function to do.

  Specifically, when the drive control unit 4 decelerates the motor 1, the determination unit 7 determines that the DC bus voltage of the inverter monitored by the DC bus voltage monitoring unit 6 is equal to or higher than a preset monitoring value. In this case, the braking control means 5 has a function of operating the brake 2. Thereby, the regenerative electric power which goes to the inverter from the motor 1 is reduced. For this reason, the deceleration of the man conveyor is maintained at the target deceleration.

Next, the method for slowly stopping the man conveyor in the present embodiment will be described using FIG. 2 in comparison with the method for slowly stopping the general man conveyor.
FIG. 2 is a timing chart for explaining a method of slowly stopping the man conveyor by the man conveyor control device 3 according to the first embodiment of the present invention.

  In FIG. 2, 8 is a DC bus voltage of the inverter when a general man conveyor is slowly stopped. 9 is a braking torque (driving) of the motor 1 at the time of a general man conveyor slow stop. Reference numeral 10 denotes a moving speed when a general man conveyor is slowly stopped.

  On the other hand, 11 is the DC bus voltage of the inverter when the man conveyor is slowly stopped according to the present embodiment. Reference numeral 12 denotes a braking torque (drive) of the motor 1 when the man conveyor is slowly stopped according to the present embodiment. Reference numeral 13 denotes a braking torque (braking) of the brake 2 when the man conveyor is slowly stopped according to the present embodiment. Reference numeral 14 denotes a moving speed when the man conveyor is slowly stopped according to the present embodiment.

  In FIG. 2, consider a case where the man conveyor is set to start deceleration at time T1, maintain the target deceleration, and stop at time T9. Generally, when there is inertia such as passenger load, the DC bus voltage 8 in the inverter rises due to the regenerative power generated.

  When the voltage reaches the first specified value, the drive control means 4 releases the braking torque (drive) 9 of the motor 1. Thereby, the moving speed 10 of the man conveyor becomes substantially constant due to inertia.

  At this time, the drive control means 4 may stop the control of the braking torque (drive) 9 of the motor 1 as it is, but when the DC bus voltage 8 drops to the second specified value, the braking torque of the motor 1 again. (Drive) 9 may be generated. Thereby, the moving speed 10 of the man conveyor is decelerated again with the target deceleration.

  In FIG. 2, the release and generation of the braking torque (drive) 9 of the motor 1 by the drive control means 4 is repeated during times T3, T5, T6, T7, T8, and T10. Thereby, interruption of deceleration of the man conveyor and maintenance of the target deceleration are repeated.

  However, in the control described above, the stop of the man conveyor is time T11, which is significantly delayed from the target stop time T9. At the same time, the stop distance of the man conveyor is also increased.

  Therefore, in the present embodiment, the DC bus voltage monitoring means 6 detects that the DC bus voltage 11 of the inverter is equal to or higher than the monitoring value smaller than the first specified value, and the drive control means 4 detects the braking torque ( The braking control means 5 generates the braking torque (braking) 13 of the brake 2 while maintaining the (driving) 12.

  This stabilizes the DC bus voltage 11 of the inverter. For this reason, the moving speed 14 of the man conveyor is maintained at the target moving speed. That is, the deceleration of the man conveyor is maintained at the target deceleration.

  In FIG. 2, at time T2, the DC bus voltage monitoring means 6 detects that the DC bus voltage 11 is equal to or higher than the monitored value. At this time, the braking control means 5 generates the braking torque (braking) 13 of the brake 2 while the driving control means 4 maintains the braking torque (driving) 12. Thereby, the deceleration of the man conveyor is maintained at the target deceleration. For this reason, the man conveyor stops at time T9 as originally scheduled.

  According to the first embodiment described above, the determination unit 7 determines that the DC bus voltage 11 monitored by the DC bus voltage monitoring unit 6 is the monitored value when the drive control unit 4 decelerates the motor 1. In this case, the brake 2 is operated by the braking control means 5 so that the deceleration of the man conveyor maintains the target deceleration. For this reason, a regenerative resistor and a large-capacity switching device are not required, and a gentle stop of the man conveyor can be realized with a small device.

Embodiment 2. FIG.
In the first embodiment, the determination unit 7 controls the drive control unit 4 and the braking control unit 5 based on the DC bus voltage monitored by the DC bus voltage monitoring unit 6. On the other hand, in the second embodiment, the determination unit 7 controls the drive control unit 4 and the braking control unit 5 based on the moving speed of the man conveyor detected by the speed detection unit 15. The second embodiment will be described below with reference to FIGS. In addition, the same code | symbol is attached | subjected to Embodiment 1 and an equivalent part, and description is abbreviate | omitted.

FIG. 3 is a block diagram of a man conveyor that uses the man conveyor control apparatus according to the second embodiment of the present invention.
As shown in FIG. 3, in the second embodiment, speed detecting means 15 is provided instead of the DC bus voltage monitoring means 6. The speed detecting means 15 has a function of detecting the moving speed of the man conveyor.

In the second embodiment, the determination unit 7 has a function of obtaining the deceleration of the man conveyor from the moving speed of the man conveyor detected by the speed detection unit 15. Furthermore, the decision means 7, as the deceleration of the passenger conveyor is deceleration target, a function to operate the brake 2 to the brake control unit 5.

Next, the method for slowly stopping the man conveyor in the present embodiment will be described using FIG. 4 in comparison with the method for slowly stopping the general man conveyor.
FIG. 4 is a timing chart for explaining a method for slowly stopping the man conveyor by the man conveyor control apparatus according to the second embodiment of the present invention.

  In FIG. 4, 16 is a target moving speed when the man conveyor is stopped gently. Reference numeral 17 denotes a braking torque (drive) of the motor 1 when the general man conveyor is slowly stopped. Reference numeral 18 denotes a moving speed when a general man conveyor is slowly stopped.

  On the other hand, 19 is a braking torque (driving) of the motor 1 when the man conveyor is slowly stopped according to the present embodiment. Reference numeral 20 denotes a braking torque (braking) of the brake 2 when the man conveyor is slowly stopped according to the present embodiment. Reference numeral 21 denotes a moving speed when the man conveyor is slowly stopped according to the present embodiment.

  In FIG. 4, consider a case where the man conveyor is set to start deceleration at time T <b> 1, maintain the target deceleration so as to reach the target moving speed 16, and stop at time T <b> 8. Generally, when there is inertia such as passenger load, the DC bus voltage in the inverter rises due to the regenerative power generated.

  When the voltage reaches the first specified value, the drive control means 4 releases the braking torque (drive) 17 of the motor 1. As a result, the moving speed 18 of the man conveyor becomes substantially constant due to inertia.

  At this time, the drive control means 4 may stop controlling the braking torque (driving) 17 of the motor 1 as it is, but when the DC bus voltage drops to the second specified value, the braking torque (driving) of the motor 1 is stopped. 17 may be generated again. Thereby, the moving speed 18 of the man conveyor is again decelerated at the target deceleration.

  In FIG. 4, the release and generation of the braking torque (drive) 17 of the motor 1 by the drive control means 4 is repeated during times T2, T4, T5, T6, T7, and T10. Thereby, interruption of deceleration of the man conveyor and maintenance of the target deceleration are repeated.

However, in the above control, the stop of the man conveyor is time T11, and the target stop time T
From 8 will be greatly delayed. At the same time, the stop distance of the man conveyor is also increased.

  Therefore, in the present embodiment, the braking control means 5 applies the braking torque (braking) of the brake 2 so that the deceleration obtained from the moving speed 21 of the man conveyor detected by the speed detecting means 15 becomes the target deceleration. 20 is generated. Thereby, the deceleration of the man conveyor becomes the target deceleration again.

  Then, after a lapse of a certain time, the judging means 7 generates a braking torque (driving) 19 by the driving control means 4 and a braking torque (braking) 20 by the braking control means 5 in a well-balanced manner, and sets the target deceleration of the man conveyor. maintain.

  In FIG. 4, the drive control means 4 releases the braking torque (drive) 19 of the motor 1 at time T2, and the brake control means 5 generates the braking torque (brake) 17 of the brake 2 at time T3. Thereafter, at time T4, the drive control unit 4 generates a braking torque (driving) 19 of the motor 1, and the braking control unit 5 decreases the braking torque (braking) 17 of the brake 2.

  Thereby, the deceleration of the man conveyor is maintained at the target deceleration. For this reason, the man conveyor stops at a time T9 which is delayed by a time difference between the times T2 and T3 from the initial scheduled stop time T8.

Next, referring to FIG. 5, the stop method at the time of inverter failure of the man conveyor in the present embodiment will be described in comparison with the stop method at the time of inverter failure of a general man conveyor.
FIG. 5 is a timing chart for explaining a method of stopping the inverter of the man conveyor when the controller of the man conveyor according to the second embodiment of the present invention fails.

  In FIG. 5, reference numeral 22 denotes a target moving speed when the man conveyor is slowly stopped. Reference numeral 23 denotes a braking torque (drive) of the motor 1 when the inverter of the man conveyor is faulty. Reference numeral 24 denotes a moving speed when an inverter failure of a general man conveyor occurs.

  On the other hand, reference numeral 25 denotes a braking torque (braking) of the brake 2 when the inverter of the man conveyor according to the present embodiment fails. Reference numeral 26 denotes a moving speed when the inverter of the man conveyor according to the present embodiment fails.

  In FIG. 5, consider a case where the man conveyor is set to start deceleration at time T <b> 1, maintain the target deceleration so as to reach the target moving speed 22, and stop at time T <b> 4. Generally, when the inverter breaks down, the man conveyor cannot be decelerated by the braking torque (drive) 23 of the motor 1.

  In FIG. 5, at time T2, the inverter breaks down and the braking torque (drive) 23 by the inverter is released. In this case, like the times T2 to T6, the moving speed 24 of the man conveyor is a more gradual deceleration, and the deceleration cannot be maintained so as to be the target moving speed 22.

  However, in the above state, it is not known when the man conveyor stops, and the target stop time T4 is greatly delayed. At the same time, the stop distance of the man conveyor is not known.

  Therefore, in the present embodiment, the braking control means 5 applies the braking torque (braking) 25 of the brake 2 so that the deceleration obtained from the speed of the man conveyor detected by the speed detecting means 15 becomes the target deceleration. generate. Thereby, the deceleration of the man conveyor becomes the target deceleration again.

  In FIG. 5, as described above, at time T2, the inverter breaks down and the braking torque (drive) 23 of the motor 1 is released. At this time, the braking control means 5 generates a braking torque (braking) 25 of the brake 2 at time T3.

  Thereby, the deceleration of the man conveyor is maintained at the target deceleration. For this reason, the man conveyor stops at a time T5 that is delayed by a time difference between the times T2 and T3 from the initial scheduled stop time T4.

  According to the second embodiment described above, the determination unit 7 determines that the braking control unit 5 is set so that the deceleration obtained from the moving speed detected by the speed detection unit 15 becomes the target deceleration at the time of failure of the inverter. The brake 2 is operated. For this reason, the man conveyor can be gently stopped even when the inverter fails.

  In the second embodiment, the configuration in which the DC bus voltage monitoring means 6 is not used has been described. However, the DC bus voltage monitoring means 6 and the speed detection means 15 may be used in combination. In this case, the speed of the man conveyor can be monitored by the speed detecting means 15 while the DC bus voltage monitoring means 6 monitors the DC bus voltage in the inverter. For this reason, the slow stop of the man conveyor can be realized more reliably while monitoring the actual speed of the man conveyor.

1 motor, 2 brake, 3 control device, 4 drive control means,
5 Braking control means, 6 DC bus voltage monitoring means, 7 Judging means,
8 DC bus voltage, 9 Braking torque (drive), 10 Travel speed,
11 DC bus voltage, 12 Braking torque (drive), 13 Braking torque (braking),
14 moving speed, 15 speed detecting means, 16 target moving speed,
17 braking torque (drive), 18 travel speed, 19 braking torque (drive),
20 braking torque (braking), 21 moving speed, 22 target moving speed,
23 braking torque (driving), 24 moving speed, 25 braking torque (braking),
26 Movement speed

Claims (3)

Drive control means for controlling the speed of the motor for driving the man conveyor using an inverter;
Braking control means for controlling the operation of a brake for braking the man conveyor;
Monitoring means for monitoring the DC bus voltage of the inverter;
The DC bus voltage monitored by the monitoring means is preset when the drive control means is provided to control the drive control means and the braking control means, and the motor is decelerated by the drive control means. If the motor conveyor decelerates the motor, the brake control means causes the brake to operate so that the deceleration of the man conveyor is maintained at the target deceleration when the monitored value is exceeded. Judgment means,
A control device for a man conveyor characterized by comprising: Speed detecting means for detecting the speed of the man conveyor;
With
The determination means causes the braking control means to operate the brake so that a deceleration obtained from the speed of the man conveyor detected by the speed detection means becomes the target deceleration. The control device for the man conveyor according to 1.   3. The man conveyor according to claim 2, wherein the determination means causes the brake control means to operate the brake so that the deceleration of the man conveyor is equal to the target deceleration when the inverter fails. Control device.

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