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Elevator controller

A technology of elevator control device and braking device, which is applied in the direction of motor generator control, control system, electrical components, etc., can solve the problems of rising manufacturing cost of elevator control device, etc., and achieve the effect of realizing regenerative braking function

Inactive Publication Date: 2009-03-18
TOSHIBA ELEVATOR KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] As a result, the manufacturing cost of the entire elevator control device increases, and the size of the elevator control device increases

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0052] Fig. 1 is a schematic configuration diagram of an elevator control device according to a first embodiment of the present invention. The same reference numerals are assigned to the same parts as those of the conventional elevator control device shown in Fig. 12, and detailed description of overlapping parts will be omitted.

[0053] The three-phase AC power supplied from the AC power source 1 through the wire 14 is full-wave rectified by the rectifier 3 of the power conversion unit 2 into DC power. The DC power output from the rectifier 3 absorbs fluctuations in the smoothing capacitor 4 and supplies it to the inverter 5 . In this converter 5, six parallel circuits 8 in which diodes 6 and switching elements 7 are connected in parallel are bridge-connected to each other.

[0054] Furthermore, each PWM signal g output from the PWM (Pulse Width Modulation) signal generating section 15 R+ , g R- , g S+ , g S- , g T+ , g T- The power-on / off control of each switching el...

no. 2 approach

[0085] Fig. 6 is a schematic configuration diagram of an elevator control device according to a second embodiment of the present invention. The same reference numerals are assigned to the same parts as those of the elevator control device according to the first embodiment of the present invention shown in FIG. 1 , and detailed description of overlapping parts will be omitted.

[0086] In the elevator control device of the second embodiment, a speedometer 27 is attached to the permanent magnet synchronous motor 16 . The speed v detected by the speedometer 27 is input to the speed control unit 28 , the current control unit 29 and the deceleration detection unit 39 .

[0087] The deceleration detection unit 39 calculates the deceleration dv by time-differentiating the input velocity v. In addition, the overcurrent detection unit 35 in the first embodiment is eliminated. Therefore, the current I of the electric wire 10 is detected by the ammeter 34 and output only to the current...

no. 3 approach

[0099] Figure 9 It is a schematic configuration diagram of an elevator control device according to a third embodiment of the present invention. The same reference numerals are assigned to the same parts as those in the elevator control device according to the first embodiment of the present invention shown in FIG. 1 , and detailed description of overlapping parts will be omitted.

[0100] In the elevator control device according to the third embodiment, a power failure detection unit 40 for detecting a power failure of the AC power supply 1 is provided on the electric wire 14 for supplying three-phase current from the AC power supply 1 to the power conversion unit 2 . Furthermore, there is provided a coil short-circuit instruction unit 43 during a power failure, which outputs PWM signals g having the following signal levels to each switching element 7 of the inverter 5 for regenerative braking of the motor 16 when a power failure occurs: R+ , g R- , g S+ , g S- , g T+ , ...

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PUM

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Abstract

An elevator control device converts an AC power into a DC power by a rectifier (3), converts it into AC power by an inverter (5), and supplied the AC power via a power line (10) to field windings (32R, 32S, 32T) of a motor (16) synchronized with a permanent magnet. When deactivating the motor (16) synchronized with a permanent magnet, a switching element (7) of the inverter (5) is maintained in a closed state and a closed circuit is formed by the switching element (7), the power line (10), and the field windings (32R, 32S, 32T) of the motor so that a regenerative current flows into the closed circuit and a regenerative energy is consumed by the field windings, thereby effectively performing regenerative braking of the motor.

Description

technical field [0001] The present invention relates to an elevator control device that converts AC power supplied from an AC power source into DC power by a rectifier, and then converts the DC power into AC power by a converter, and supplies the DC power to a motor that moves an elevator car up and down. More specifically, the present invention relates to an elevator control device having a regenerative braking function for braking the motor by converting the rotational energy of the motor into regenerative power when the motor is stopped, and consuming the regenerative power energy. . Background technique [0002] In an elevator system installed in a building or the like, a cable is hung from a sheave of a motor installed in a machine room above the hoistway, and a car and a counterweight are attached to both ends of the cable. Usually, the weight of the counterweight is adjusted to be substantially equal to the weight of the car in a state when half of the rated number o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B1/34B66B1/32H02P3/18
CPCB66B1/30
Inventor 秋月博光岛根一夫高崎一彦
Owner TOSHIBA ELEVATOR KK
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