Method and system for controlling elevator by adopting permanent magnet synchronous motor

A permanent magnet synchronous motor technology, applied in the field of elevator control, can solve problems such as motor noise pollution, achieve the effects of eliminating sound, improving safety, and avoiding poor contact contact

Active Publication Date: 2009-09-16
SUZHOU INOVANCE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention also provides a method and system for controlling an elevator by using a permanent magnet

Method used

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  • Method and system for controlling elevator by adopting permanent magnet synchronous motor
  • Method and system for controlling elevator by adopting permanent magnet synchronous motor
  • Method and system for controlling elevator by adopting permanent magnet synchronous motor

Examples

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Example Embodiment

[0033] like figure 2 As shown, it is a structural diagram of an embodiment of a system for controlling an elevator by using a permanent magnet synchronous motor according to the present invention. In this embodiment, the system includes a motor 23 , a holding brake 24 , a motor drive control unit 21 , and a main contactor 22 , wherein the motor drive control unit 22 is connected to an external power source and supplies power to the motor 23 via the main contactor 22 . The motor drive control unit 21 is also used to receive feedback information from the holding brake 24 , the motor 23 and the main contactor 22 , and control the closing and opening of the main contactor 22 and the opening and closing of the holding brake 24 .

[0034] like image 3 Shown is a schematic diagram of the structure of the motor drive control unit 21 . The motor drive control unit 21 includes a speed adjustment unit 211 , a current adjustment unit 212 , a current control unit 213 and a motor startin...

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PUM

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Abstract

The invention relates to a method for controlling an elevator by adopting a permanent magnet synchronous motor. In the starting stage of the elevator, the method comprises the following steps of: (a) after receiving a feedback signal of closing a main contactor, outputting a detecting current to the motor; (b) detecting a feedback current of the motor, if the feedback current is greater than or equal to a given threshold, executing step (c), otherwise, executing step (d); (c) restoring the current output to the motor to a normal starting state, and opening an internal contracting brake; and (d) alarming and stopping the output of the internal contracting brake. The invention also provides a corresponding system for controlling the elevator by adopting the permanent magnet synchronous motor. The invention can avoid the elevator from generating vehicle slipping caused by the failure of the main contactor or poor contact of contacts, thus improving the safety of the elevator. In addition, the invention can eliminate sound generated due to sudden changes of the current in the parking process of the elevator.

Description

technical field [0001] The invention relates to the field of elevator control, in particular to a method and system for controlling an elevator by using a permanent magnet synchronous motor. Background technique [0002] With the development of elevator control technology and the needs of elevator applications, permanent magnet synchronous motors are gradually replacing asynchronous motors and becoming the mainstream drive traction machine for elevators. [0003] The asynchronous traction machine used in traditional elevators uses a mechanical reduction device (such as a gearbox) to increase its torque. The permanent magnet synchronous motor's starting torque and overload capacity are one power level higher than that of the three-phase asynchronous motor, and the ratio of the maximum starting torque to the rated torque can reach 3.6 times, while the general asynchronous motor is only 1.6 times. The number of pole pairs of permanent magnet synchronous motors used in elevator...

Claims

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Application Information

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IPC IPC(8): B66B5/02B66B1/00B66B1/28
Inventor 刘宇川肖庆清李俊田傅晓洲
Owner SUZHOU INOVANCE TECH CO LTD
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