JPH07252073A - Controller of man conveyor - Google Patents

Abstract

PURPOSE:To secure a man conveyor controller that is almost no restriction to the extent of applicable step height or stroke, possible for high lift (long stroke), and excellent in controllability and reliability. CONSTITUTION:This controller is provided with two a.c. driving motors 17 and 18 driving and controlling a man conveyor step 4, two inverters 31 and 38 supplying each a.c. power to these a.c. driving motors 17 and 18, two converters 29 and 36 being installed each in an interval between these inverters 31, 38 and a common a.c. power source 10, and at ordinary times, feeding these a.c. driving motors 17 and 18 with a.c. power, and at a time when these motors 17 and 18 are of regenerative operation, regenerating this regenerative power to the a.c. power source 10, and an operation controller 40 imparting a common operating command to each of these inverters 31 and 38, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a passenger conveyor such as an escalator.

[0002]

2. Description of the Related Art An example of a conventional escalator is shown in FIG.
~ There is one configured as shown in FIG. 5 is a structural diagram showing the first example thereof, FIG. 6 is a diagram showing the main circuit of FIG. 5, and FIG. 7 is a structural diagram showing the second example thereof.
8 is a diagram showing the main circuit of FIG. 7, and FIG. 9 is a diagram showing the main circuit of the third example thereof. These will be described below.

<First Example> As shown in FIG.
Is arranged on the uppermost part of the truss 9, and the step chain 5 connecting the steps 4 is wound up by the upper chain gear 2.

In the figure, 3 is a lower chain gear, 6 is a handrail drive device,
7 is a rubber handrail, and 8 is a side panel. FIG. 6 is a main circuit showing the configuration of the driving machine 1. Electric power from the commercial three-phase power supply 10 is supplied to a driving electric motor, for example, a three-phase induction electric motor 12 via an electromagnetic contactor 11.

<Second Example> As shown in FIGS. 7 and 8, the drive units 14 and 15 are arranged in the middle of the truss 9 to drive the sweep link 13 connecting step 4. The drive units are arranged in a distributed manner, and by doing so, it is possible to cope with an increase in drive units as the floor height increases. In addition, 10 is a commercial power supply and 16 is a handrail drive device.

In this case, as a drive system, an auto transformer 21 is provided in order to reduce a rush current and a start shock of the electric motors 17 and 18 at the time of starting. First, the electromagnetic contactor 19 is turned on, the rush current is suppressed by the auto transformer 21, and then the electromagnetic contactor 20 is turned on to drive the condorfa starting method.

<Third Example> As shown in FIG. 9, the driving motors 17 and 18 are driven by an inverter 23 and an electromagnetic contactor 22.
It is a method of connecting and driving with.

[0008]

Each of the examples described above has the following problems. In the first example, since the escalator is driven by the single driving electric motor 12 by the single commercial power source 10, the floor height to be applied is, for example, 10
If the height is higher than m, the capacity of the drive motor 12, the speed reducer outer shape, the chain outer shape, etc. are correspondingly increased, and the size becomes larger than most of the constituent parts, and special parts must be used. In addition, the size of equipment is increased, which causes an increase in occupied space and weight, which limits the applicable floor height.

In the second example, although the drawbacks of the first example can be eliminated, the number of drive units 14 and 15 also increases due to the increase in the floor height applied, so that the adjustment of the load between the drive units and the load increase. However, there is difficulty in processing when there is a change in the value, handling when there is an abnormality, and so on.

Further, in the third example, each drive motor 1
It is difficult to correct the variation between 7 and 18,
In addition, there is a concern that the inverter 23 will stop if it breaks down.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a control device for a man conveyor which has almost no restrictions on the floor height or stroke to be applied, allows a high lift (long stroke), and is excellent in controllability and reliability. .

[0012]

In order to achieve the above object, the invention according to claim 1 is directed to a plurality of AC drive motors for driving and controlling steps of a man conveyor, and AC power to each AC drive motor. A plurality of inverters to be supplied and an AC power source common to each of the inverters are respectively provided, and DC power is constantly supplied to each of the inverters, and each of the AC drive motors supplies each of the regenerative power during regenerative operation. A plurality of converters regenerated to the AC power supply,
An operation control device that gives a common operation command to each of the inverters.

In order to achieve the above object, the invention according to claim 2 is the control apparatus for a man conveyor according to claim 1, wherein a plurality of opening and closing devices are provided respectively between the AC power supply and the converters. And a failure detection device that gives an opening command to each of the switches when a failure of each of the converters and the inverters is detected, the control device for the man conveyor.

In order to achieve the above object, the invention according to claim 3 includes a plurality of AC drive motors for driving and controlling the steps of the man conveyor, and a plurality of inverters for supplying AC power to the AC drive motors. A plurality of rectifiers that are respectively disposed between the respective inverters and a common AC power source and supply DC power to the respective inverters, and that are respectively disposed between the respective inverters and the respective rectifiers, and the respective AC drive motors are A controller for a man conveyer including a resistance regeneration circuit that consumes each regenerative energy during regenerative operation, and an operation control device that gives a common operation command to each inverter.

In order to achieve the above object, the invention according to claim 4 is the control device for a man conveyor according to claim 3, wherein a plurality of opening / closing devices are provided between the AC power supply and the converters. And a failure detection device that gives an opening command to each of the switches when a failure of each of the converters and the inverters is detected, the control device for the man conveyor.

[0016]

According to the invention corresponding to claim 1 or claim 3, the driving motors for driving the steps are dispersed into a plurality of motors, and the inverters supplying the electric power to the respective motors are supplied from the same operation control device. Since I gave a driving command,
Even in a high-floor floor or long-passage man conveyor, a man conveyor control device with a good load balance and good control performance can be obtained without being restricted by space and weight.

According to the invention corresponding to claim 2 or claim 4, standardization of parts is possible, which is advantageous in terms of cost, and even in the case of failure, operation can be continued by disconnecting only the failure occurrence unit. It is possible to provide a highly reliable passenger conveyor control device that does not impair serviceability.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a structural diagram of the first embodiment of the present invention, and FIG. 2 is a diagram showing its main circuit. 24, 25 in the figure
Is a drive unit, 26 and 33 are drive units 24 and 25
Drive devices, 27 and 34 are electromagnetic contactors in the drive units 24 and 25, 28 and 35 are power supply reactors, 29 and
36 is an insulated gate bipolar transistor (IGBT)
A converter consisting of a plurality of self-extinguishing elements such as
Reference numeral 37 is a smoothing capacitor, 31 and 38 are inverters composed of a plurality of self-extinguishing elements such as IGBTs, 32 and 39 are unit control devices, and 40 is an operation control device.

This will be described below. A plurality of AC drive motors 17 and 18 for driving and controlling step 4 of the passenger conveyor (here, the case of two is explained, but not limited to this case) and AC power are supplied to the AC drive motors 17 and 18, respectively. Multiple inverters 31, 38
And an AC power source 10 common to the inverters 31 and 38
The inverters 31 and 38 are normally provided between the inverters 31 and 38, respectively.
DC power is supplied to each of the AC drive motors 17, 18
However, during regenerative operation, a plurality of converters 29 and 36 that regenerate each of the regenerative powers into the AC power supply 10, and inverters 31 and
Operation control device 40 for giving common operation command to 38
It is equipped with.

Further, the AC power source 10 and each converter 2
When a failure is detected in the plurality of switches, for example, the electromagnetic contactors 27, 34 and the converters 29, 36 and the inverters 31, 38, which are respectively disposed between the electromagnetic contactors 27, 34. A failure detection device for giving a release command, for example, unit control devices 32, 39 are provided.

Further, between the electromagnetic contactors 27, 34 and the converters 29, 36, power supply reactors 28, 35 are provided.
Are connected. Further, the smoothing capacitor 3 is provided between the converters 29 and 36 and the inverters 31 and 38, respectively.
0 and 37 are connected.

The operation of the first embodiment thus constructed will be described. During operation, a closing signal is output from the operation control device 40 to the electromagnetic contactors 27, 34 in the respective drive units 24, 25, the power supply 10 is connected, and the reactors 28, 35 and the converters 29, 36 are used for smoothing. The capacitors 30 and 37 are charged.

Here, the operation control device 40 outputs the operation signals 32a and 39a to the unit control devices 32 and 39, the operation signals 32a and 39a are output to the inverters 32 and 39, and the inverters 31 and 38 are operated. The driving electric motors 17 and 18 are operated. Unit control devices 32, 39
The same speed command is output from the operation control device 40, and the drive motors 17 and 18 are operated in synchronization.

When the drive motors 17 and 18 are in the power running mode, the converters 29 and 36 move to the inverters 31 and 38.
Electric power is supplied to the drive motors 17 and 18 via the. In this case, in the regenerative operation mode such as the DN operation in which the load is large, the drive motors 17 and 18 reversely drive the inverters 31 and 3.
8 through converters 29, 36 and reactors 28, 35
Power is regenerated to the power supply 10 by the control of. As a result, the voltage across the smoothing capacitors 30 and 37 is also kept substantially constant, and the operation of the drive motors 17 and 18 is stably controlled regardless of the load.

In addition, the drive unit 2 somewhere during operation
If any of the units 4 and 25 has a failure, the failure signal 32b or 39 from the failed unit controller 32 or 39
b is output to the operation control device 40 and its failure signal 32b
Alternatively, the operation control device 40 receives the operation signal 32a or 39a from the operation control device 40 in response to the operation 39b, disconnects the operation unit 32a or 39a from the electromagnetic contactor 27 or 34, and disconnects the operation unit from another operation unit. .

Such a control circuit is shown in FIG.
Control power supplies 41, 42, operation switch 43, stop switch 44, operation relay having normally open contacts 45a, 45b, 45c, operation relay 46 of drive unit 24, drive device 2
No. 6 failure detection keep relay normally closed contact 47, drive unit 25 operation relay 48, drive device 33 failure detection keep relay normally closed contact 49.

During operation, when the operation switch 43 is turned on, the operation relay switch 45 is excited and the normally open contact 45a is closed and self-maintained. In addition, the normally open contact 45
b, 45c closed, operation relay 4 of each unit
6, 48 are excited and the operation is started. If an abnormality occurs in the unit in this state, a failure detection keep relay (not shown) is excited, the normally closed contact 47 or 49 is opened, and the unit operation relays 46 and 48 corresponding thereto are opened.
Is demagnetized, the operation of the faulty unit is stopped, and the unit is disconnected. However, the remaining healthy units can continue to operate and continue to operate.

According to the first embodiment described above, the following operational effects can be obtained. Each dispersed drive unit 2
By arranging the inverters 31 and 38 in 4 and 25, respectively, stable load-balanced control and driving become possible.

Further, even in the case of a high floor (long stroke) exceeding 10 m, for example, by increasing the number of drive units,
It is possible to deal with almost no restrictions. Furthermore, even if a failure occurs in the inverter or the like, by disconnecting only the failed unit, it is possible to continue operation in another healthy unit, and it is possible to obtain a highly reliable device. .

FIG. 4 shows the main circuit of the drive unit of the passenger conveyor showing the second embodiment of the present invention.
Unlike the embodiment, the converter 29 is not provided on the power supply side, and only the diode rectifier 50 is used instead of the converter 29.
Is configured to consume regenerative energy. 2 is different from FIG. 2 in that a self-extinguishing element 52 such as an insulated gate bipolar transistor (IGBT) and a unit controller 53 for inputting an operation signal 53a and outputting a failure signal 53b are provided.

With this configuration, during regenerative operation, it is detected that the voltage across the smoothing capacitor 30 has risen, and the self-extinguishing element 52 is turned on and consumed by the regenerative resistor 51.

The present invention is not limited to the embodiments described above,
For example, it can be modified as follows. When the circuit of FIG. 4 is applied to the lift-only man conveyor, the regenerative operation mode is lost, so the regenerative resistor 51 and the self-extinguishing element 5
2 may be omitted.

The drive units 24 and 25 shown in FIG. 2 may be collectively installed in the intermediate truss 9. Further, the electric motors 17 and 18 and the speed reducer can be put in the truss 9, and the inverters 31 and 38, the converters 29 and 36, and the electromagnetic contactors 27 and 34 can be separately installed at different places.

[0034]

According to the present invention, the following operational effects can be obtained. That is, it is possible to provide a control device for a man conveyor having a well-balanced load and good control performance without being restricted by space, weight, etc., even in a high floor or a long conveyor.

Further, standardization of parts is also possible, which is advantageous in terms of cost. In case of failure occurrence, only the failure occurrence unit can be separated to continue the operation, and the reliability is high and the serviceability is not impaired. A conveyor control device can be provided.

[Brief description of drawings]

FIG. 1 is a structural diagram of a first embodiment of a passenger conveyor control device according to the present invention.

FIG. 2 is a diagram showing a main circuit of FIG.

FIG. 3 is a diagram showing a control circuit of FIG. 1.

FIG. 4 is a structural diagram of a second embodiment of the control device for a passenger conveyor according to FIG.

FIG. 5 is a structural diagram showing a first example of a conventional passenger conveyor.

6 is a diagram showing a main circuit of FIG.

FIG. 7 is a structural diagram showing a second example of a conventional passenger conveyor.

8 is a diagram showing a main circuit of FIG. 7. FIG.

FIG. 9 is a structural diagram showing a third example of a conventional passenger conveyor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Drive machine, 2 ... Upper chain gear, 3 ... Lower chain gear, 4 ... Step, 5 ... Step chain, 6 ... Handrail drive device, 7
... rubber handrail, 8 ... side panel, 9 ... truss, 10 ... commercial power supply, 11 ... electromagnetic contactor, 12 ... driving electric motor, 2
4, 25 ... Drive unit, 26, 33 ... Drive device, 2
7,34 Electromagnetic contactor, 28,35 ... Reactor for power supply,
29, 36 ... Converter, 30, 31 ... Smoothing capacitor, 31, 38 ... Inverter, 32, 39 ... Unit control device, 40 ... Operation control device, 41, 42 ... Control power supply,
43 ... Operation switch, 44 ... Stop switch, 45 ... Operation relay, 46, 48 ... Operation signal relay, 47, 49 ... Failure detection keep relay b contact, 50 ... Diode rectifier, 51 ... Regenerative resistance, 52 ... IGBT, 53 … Unit controller.

Claims (4)

[Claims] 1. A plurality of AC drive motors for driving and controlling steps of a man conveyor, a plurality of inverters for supplying AC power to the AC drive motors, and an AC power supply common to the inverters, respectively. A plurality of converters that supply DC power to each of the inverters at all times, and that regenerate each of the regenerative powers to the AC power supply during regenerative operation of each of the AC drive motors, and a common operation for each of the inverters. An operation control device that gives a command, and a control device for a man conveyor that includes the operation control device. 2. The control device for a passenger conveyor according to claim 1, wherein a plurality of switches respectively arranged between the AC power supply and the converters and failures of the converters and the inverters are detected. A failure detecting device for giving an opening command to each of the switches, and a control device for the man conveyor, wherein: 3. A plurality of AC drive motors for driving and controlling the steps of the man conveyor, a plurality of inverters for supplying AC power to the AC drive motors, and an AC power supply common to the inverters. A plurality of rectifiers for supplying DC power to each of the inverters, and a resistance regeneration circuit that is disposed between the inverters and the rectifiers and consumes the regenerative energy of each AC drive motor during regenerative operation. And an operation control device that gives a common operation command to each of the inverters. 4. The control device for a passenger conveyor according to claim 3, wherein a failure is detected in a plurality of switches respectively arranged between the AC power supply and the converters, and the converters and the inverters. A failure detecting device for giving an opening command to each of the switches, and a control device for the man conveyor, wherein: