Control apparatus and control method for passenger conveying machine

A technology for passenger conveyors and control devices, which is applied in transportation and packaging, energy efficiency of escalators, sustainable buildings, etc., can solve problems such as large impacts, complex devices and prices, and achieve the effects of reducing impacts and preventing noise and vibration

Active Publication Date: 2008-07-16
TOSHIBA ELEVATOR KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the control device described in Patent Document 1 adopts a configuration in which the synchronization of the frequency is detected by the synchronization detection device to switch the power supply, so the device itself is complicated and expensive.
In addition, since the control device described in Patent Document 2 is configured to provide a dead time until the residual voltage of the induction mot

Method used

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  • Control apparatus and control method for passenger conveying machine
  • Control apparatus and control method for passenger conveying machine
  • Control apparatus and control method for passenger conveying machine

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Experimental program
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no. 1 Embodiment approach

[0022] First, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2 . In addition, FIG. 1 is a main circuit diagram of the control device of this embodiment, and FIG. 2 is a control circuit diagram of the control device.

[0023] As shown in FIG. 1, the control device of this embodiment is configured to include a conversion device 2 that converts three-phase AC from commercial power sources R, S, and T into a three-phase AC with variable voltage and variable frequency, and can selectively The three-phase alternating current from the commercial power sources R, S, T and the three-phase alternating current converted by the conversion device 2 are switched in an orderly manner to supply the induction motor 3 for moving the steps of the passenger conveyor. Furthermore, a structure is adopted in which the connection of the three-phase power supply lines of the induction motor 3 can be selectively switched between the star connection and the d...

no. 2 Embodiment approach

[0042] Next, a second embodiment of the present invention will be described with reference to FIGS. 5 and 6 . In addition, FIG. 5 is a main circuit diagram of the control device according to this embodiment, and FIG. 6 is a control circuit diagram of the control device.

[0043] As shown in FIG. 5 , the control device of this embodiment is configured to include a conversion device 2 that converts three-phase AC from commercial power sources R, S, and T into a three-phase AC with variable voltage and variable frequency, and can selectively The three-phase alternating current from the commercial power sources R, S, T and the three-phase alternating current converted by the conversion device 2 are switched in an orderly manner and supplied to the induction motor 3 for moving the steps of the passenger conveyor. In addition, the three-phase power lines of the induction motor 3 each have a starting resistor 27 connected in series, and a circuit that passes through the starting resi...

no. 3 Embodiment approach

[0062] Next, a third embodiment of the present invention will be described with reference to FIG. 8 . In addition, FIG. 8 is a main circuit diagram of the control device of this embodiment. The control circuit diagram of the control device of this embodiment is the same as the circuit diagram of the second embodiment shown in FIG. 6 , and this circuit diagram is used.

[0063] As shown in FIG. 8 , the control device of the present embodiment has a configuration in which a starting choke coil 28 is provided instead of the starting resistor 27 , and the other configurations are the same as those of the control device of the second embodiment. That is, in the control device of the present embodiment, when the power supply of the induction motor 3 is switched, the three-phase power supply lines of the induction motor 3 are temporarily provided with the choke coils 28 for starting respectively by using the control circuit shown in FIG. 6 to lower the power supply voltage. After th...

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PUM

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Abstract

The invention provides a control apparatus of a passenger conveyor and a control method which can effectively reduce the impact to an induction-motor when source transfer in a simple and low-cost structure, and can prevent the occur of noise and shake. A star-delta start the same as the starting running is made when the source is transferred for the induction-motor, the provisional connection of the induction-motor is star connection and then transfers to a delta connection. The induction-motor is supplied power provisionally by the starting resistance or the starting choking coil when the source is transferred for the induction-motor, and then the power is supplied by winding off the starting resistance and the starting choking coil.

Description

technical field [0001] The present invention relates to a control device and a control method of a passenger conveyor, which move circularly connected multi-stage steps to transport passengers riding on the steps, and particularly relate to reducing the power switching time of an induction motor used to move the steps Shock technology. Background technique [0002] In passenger conveyors such as escalators and moving walks, it is sometimes necessary to be able to switch the operating speed. This kind of passenger conveyor that can switch the operating speed uses a conversion device such as an inverter to convert the three-phase AC from the commercial power supply into a three-phase AC with variable voltage and variable frequency, and provides power to the induction motor used to move the steps. A three-phase AC whose frequency is lower than that of a commercial power supply performs low-speed operation. In addition, when switching from low-speed operation to high-speed ope...

Claims

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Application Information

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IPC IPC(8): B66B25/00
CPCY02B50/225Y02B50/00
Inventor 前田敦司
Owner TOSHIBA ELEVATOR KK
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