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Weighing-sensor-free self-adaption starting torque compensation method of elevator permanent-magnet dragging guiding system

A technology of load cell and traction system, which is applied to elevators, lifts, transportation and packaging in buildings, etc., can solve the problems of reduced reliability and increased cost of elevator systems.

Inactive Publication Date: 2013-12-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that using a weighing sensor to obtain elevator load weight information to maintain the balance of the elevator system before operation will cause the reliability of the elevator system to decrease and the cost to increase. It provides an elevator permanent magnet traction system without Adaptive Starting Torque Compensation Method for Load Cell

Method used

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  • Weighing-sensor-free self-adaption starting torque compensation method of elevator permanent-magnet dragging guiding system
  • Weighing-sensor-free self-adaption starting torque compensation method of elevator permanent-magnet dragging guiding system
  • Weighing-sensor-free self-adaption starting torque compensation method of elevator permanent-magnet dragging guiding system

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specific Embodiment approach 1

[0097] Specific implementation mode one: the following combination figure 1 This embodiment is described. The elevator permanent magnet traction system in this embodiment does not have a weighing sensor adaptive starting torque compensation method. The permanent magnet traction system uses a permanent magnet synchronous motor as the traction machine. The permanent magnet synchronous motor Using a sine-cosine encoder as a position sensor, it includes the following steps:

[0098] Step 1: During the operation of the permanent magnet synchronous motor, a microprocessor is used to collect the position signal A and the position signal B output by the sine-cosine encoder, the position signal A and the position signal B are two orthogonal signals, and the microprocessor The two-way quadrature signal is compared with hysteresis to obtain the incremental count value CNT, and then the incremental count value CNT is corrected to obtain the incremental count correction value CNTU, and the...

specific Embodiment approach 2

[0101] Specific implementation mode two: the following combination image 3 Describe this embodiment, this embodiment will further explain the first embodiment, the specific method of correcting the incremental count value CNT to obtain the incremental count correction value CNTU in step 1 is as follows:

[0102] When the microprocessor collects the position signal A and position signal B output by the sine-cosine encoder for the first time, it first sets the incremental count value CNT, the incremental count correction value CNTU and the incremental count value CNTOLD of the previous sampling period to zero; then Position signal A and position signal B do arc tangent calculation to obtain subdivision value θ div , and then according to the subdivision value θ div Calculate the permanent magnet synchronous motor rotor position value θ with the incremental count correction value CNTU; assign the incremental count value CNT to the incremental count value CNTOLD of the previous ...

specific Embodiment approach 3

[0111] Specific implementation mode three: the following combination figure 2 Describe this embodiment mode, this embodiment mode is further described to embodiment mode 2, and the specific method of judging the steering of permanent magnet synchronous motor is:

[0112] The position signal A and the position signal B output by the sine-cosine encoder are periodic orthogonal signals, which are divided into four intervals I, II, III and IV in sequence. In the interval I, the position signal A is positive, and the position signal B is positive; in interval II, position signal A is negative and position signal B is positive; in interval III, position signal A is negative and position signal B is negative; in interval IV, position signal A is positive and position Signal B is negative;

[0113] When the interval switching sequence of position signal A and position signal B output by the sine-cosine encoder is: Ⅰ→Ⅱ, Ⅱ→Ⅲ, Ⅲ→IV or Ⅳ→Ⅰ, it is determined that the permanent magnet syn...

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Abstract

The invention provides a self-adaption starting torque compensation method of an elevator permanent magnet dragging guiding system without using a weighing sensor, belongs to the technical field of electrical machine and elevator dragging guiding control, and aims to solve the problem that elevator system reliability is reduced and production cost is increased due to the manner of acquiring elevator load weight information via the weighing sensor to maintain balance before the elevator system is in operation. The self-adaption starting torque compensation method includes adopting microprocessor to collect position signals output by a sine and cosine encoder, calculating to acquire current positional value theta of a permanent magnet synchronous motor, calculating to acquire current reversing distance theta m, reversing speed wk and reversing accelerated speed alpha k of the motor according to theta, and then confirming the starting torque compensation method of the motor and performing self-adaption compensation to starting torque of the permanent magnet synchronous motor. The self-adaption starting torque compensation method without using the weighing sensor is applicable to perform self-adaption compensation to starting torque of the elevator permanent magnet dragging guiding system.

Description

technical field [0001] The invention relates to an adaptive starting torque compensation method for an elevator permanent magnet traction system without a weighing sensor, and belongs to the technical field of motor and elevator traction control. Background technique [0002] During the operation of the elevator, the traction machine drives the car and the counterweight to move through the wire rope. When the car moves to the target floor, the brake will hold the traction machine, the speed of the car will drop to zero, and the car door will open. Some passengers get out of the car while new passengers enter the car. When the car is running again, the brake is opened, and an unknown load torque is suddenly applied to the traction machine. At this time, if the electromagnetic torque generated by the traction machine cannot be balanced with the load torque in time, the rotor of the traction machine will be broken. If a small distance of rotation occurs in the direction of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B1/06B66B11/04
Inventor 王高林李铁链徐进张国强贵献国徐殿国
Owner HARBIN INST OF TECH
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