Compensating method of cogging torque of permanent-magnetic synchronous tractor for elevator

A technology of cogging torque and permanent magnet synchronization, which is applied in the direction of elevators, transportation and packaging in buildings to achieve good suppression effect

Active Publication Date: 2012-04-11
SHANGHAI GIE EM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a compensation method for the cogging torque of the permanent magnet synchronous traction machine used in elevators to solve the problem of frequency conversion in existing use. In the drive system of the motor, in order to suppress the influence of the cogging torque of the traction machine, the performance of the control hardware is improved, which not only increases the difficulty of debugging, but also cannot be effectively suppressed with the increase of the motor speed. series of questions

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[0019] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0020] Such as figure 1 As shown, it is a simple block diagram of a permanent magnet synchronous traction machine system driven by a frequency converter, and the present invention is implemented based on the traction machine system.

[0021] In the control loop of the frequency converter, the frequency converter controls the operation of the traction machine through the internal operation of the position signal θ sent by the position sensor and the speed command ω* of the elevator system, and the speed calculation module converts the position θ information into the speed information ω output , the current sensor is used to obtain the output current Iq, the speed regulator outputs the current command Iq1* according to the speed command ω* and the ...

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Abstract

The invention discloses a compensating method of the cogging torque of a permanent-magnetic synchronous tractor for an elevator, which comprises the following steps of: compensating according to the position of a rotor of the tractor in a control system of a frequency transformer on the basis of the characteristic that the cogging torque periodically changes along with the change of the position of a motor rotor so as to inhabit the influence of the cogging torque on elevator system performance. The invention can compensate a cogging torque influence on the premise without improving the performance of controller hardware, and has good inhabiting effect on the cogging torque influence within the range of the operable rotating speed of a driving system.

Description

technical field [0001] The invention relates to a control method, in particular to a method for compensating the cogging torque of an elevator system driven by a frequency converter to drive a permanent magnet synchronous traction machine. [0002] Background technique [0003] In elevator applications, when permanent magnet synchronous traction machines are used, due to the cogging torque of permanent magnet synchronous motors, vibration and noise are often caused and the quality of the system is reduced. [0004] In most elevator inverter drive systems, the cogging torque and the torque effects caused by various other reasons are unified as disturbance torque, which is suppressed by increasing the control bandwidth and torque observation. On the one hand, the controller hardware Higher performance requirements are put forward, and debugging is also very inconvenient, and the elastic deformation of the elevator traction rope during operation will cause incorrect torque obse...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B11/04
Inventor 吴志敢黄洪剑周根富
Owner SHANGHAI GIE EM
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