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Elevator Control

A technology of elevator control device and current, applied in the field of elevator control device to achieve the effect of eliminating electromagnetic noise

Active Publication Date: 2017-07-21
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, if an alternating voltage is applied to the armature coil of the synchronous motor in this way, electromagnetic noise is generated in the armature coil, and this electromagnetic noise is transmitted to the car or the living room adjacent to the hoistway and is recognized as abnormal noise.

Method used

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Examples

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Embodiment Construction

[0035] Embodiments of the present invention will be described in detail below using the drawings, but the present invention is not limited to the following embodiments, and various modified examples and application examples are included within the scope of the technical concept of the present invention.

[0036] figure 1 Shows the structure of an elevator, in which the sheave 2 around which the main rope 1 is wound is rotated by a synchronous motor 3 using a permanent magnet rotor, and the car 4 and the counterweight 5 of the elevator are moved in opposite directions via the main rope 1 Lift drive. A motor output line on the output side of a three-phase AC power supply 6 used as a power source for the synchronous motor 3 is connected to an armature coil of the synchronous motor 3 via an inverter device 7 .

[0037] On the output side of the inverter device 7, a dynamic brake device 9 is provided, which short-circuits the three phases of the motor output line that supplies pow...

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PUM

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Abstract

The present invention provides an elevator control device capable of restarting a synchronous motor while suppressing the generation of electromagnetic noise when restarting a synchronous motor when a rotary encoder fails. Detects the abnormality of the rotary encoder, obtains the motor current flowing through the armature coil until the synchronous motor is stopped by dynamic braking, uses this motor current to calculate the magnetic pole position at the time point when the synchronous motor stops, and uses this magnetic pole position to restart the Synchronous motors are used to move the car to a given floor. Accordingly, since the magnetic pole position can be calculated without applying a voltage to the synchronous motor, it is possible to eliminate the generation of electromagnetic noise when the synchronous motor is restarted.

Description

technical field [0001] The present invention relates to an elevator control device for controlling an elevator car of a building, and more particularly to an elevator control device for an elevator using a synchronous motor using a permanent magnet rotor as a hoist. Background technique [0002] In general, an elevator is configured by suspending a car disposed in a hoistway formed in a building by a main rope (hoisting rope), and hoisting the main rope with a hoist to move the car up and down in the hoistway. lift. Here, various electrical load devices that require power sources, such as destination display devices, elevator door opening and closing devices, position detectors and other sensors, and air conditioners, are mounted on the car. For this purpose, a moving cable provided with a power line for power supply is straddled over the walls of the car and the hoistway. [0003] In addition, a hoist that hoists the main rope generally uses a synchronous motor using a pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B1/46B66B1/06
Inventor 高山直树深田裕纪星野孝道峰尾智昭照沼智明永沼一斗田子雅弘
Owner HITACHI LTD
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