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Permanent magnetism brushless direct current motor electric gearless elevator drag device

A permanent magnet brushless DC and elevator traction technology, which is applied in the field of motor design and control technology, power electronics, and elevator traction control, to achieve the effects of reduced volume, large static torque, and improved control effect

Inactive Publication Date: 2009-10-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The elevator traction device of the present invention is proposed mainly to solve the problems of the existing elevator traction machine, thereby reducing the cost of the traction machine, improving system reliability and control characteristics

Method used

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  • Permanent magnetism brushless direct current motor electric gearless elevator drag device
  • Permanent magnetism brushless direct current motor electric gearless elevator drag device
  • Permanent magnetism brushless direct current motor electric gearless elevator drag device

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Embodiment Construction

[0018] The gearless elevator traction device of the present invention includes a permanent magnet brushless DC motor, a sheave 3, an electromagnetic brake 1, a brake disc 4, a controller, a power module, a machine base, etc., and its structural diagram is as follows figure 1 shown. The sheave 3, the brake disc 4 and the rotor of the motor are coaxial and fitted into a whole. The car and the counterweight straddle the two sides of the sheave 3 through the wire rope, and the traction machine pulls the car and the counterweight to move up and down through the friction between the sheave 3 and the wire rope. The electromagnetic brake 1 controls the brake arm 2. When the power is off, the brake arm 2 is pushed by the spring and pressed tightly on the brake disc 4 to avoid accidents when the power is off; the electromagnetic brake 1 can overcome the force of the spring after the control coil is energized , push away the brake arm 2, so that the traction machine can rotate normally....

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Abstract

The invention belongs to a controlling technology field of elevator dragging, which relates to an elevator dray device of a permanent magnet brushless DC motor without gear. The elevator dray device comprises the permanent magnet brushless DC motor, a sheave, an electromagnetic brake, a brake disc and a controller, among which, the brake disc and the sheave are arranged on a rotor shaft of the permanent magnet brushless DC motor; the permanent magnet brushless DC motor comprises a rotor and a stator; a radial magnetizing permanent magnet is stuck on the surface of the rotor; a concentrated winding is adopted by the stator for driving the sheave and providing torque which is needed for dragging the elevator car; through the friction torque between wire cables, the sheave pulls an elevator car to move upward and downward; controlled by the electromagnetic brake, a brake arm is used for ceasing rotation of the sheave in the situation of power cut; the controller is used for controlling the operation of the four quadrant in the permanent magnet brushless DC motor. The elevator dray device provided by the invention has the advantages of high efficiency, low cost, small volume, strong force, wide speed range as well as reliability and safety.

Description

technical field [0001] The invention relates to the field of motor design and control technology and power electronics technology, and belongs to the field of elevator drag control, in particular to a gearless reduction mechanism elevator traction device of a freight elevator. Background technique [0002] With the rapid development of my country's construction industry, in recent years, China's elevator industry has risen rapidly, and its huge market potential has attracted worldwide attention. The motor and its control technology are the core of the elevator traction machine. A traction machine using a high-speed motor requires a mechanical deceleration mechanism, which is generally called a geared traction machine; a low-speed motor does not require a deceleration mechanism, and is generally called a gearless traction machine. . At present, the geared traction machine is widely used in freight elevators. This kind of traction machine has the disadvantages of large wear, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B11/04B66B1/00
Inventor 夏长亮方攸同陈炜史婷娜
Owner TIANJIN UNIV
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