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Speed sensorless control method of permanent magnet synchronous linear motor

A permanent magnet synchronous linear, speed sensorless technology, used in motor control, single motor speed/torque control, motor generator control, etc., can solve the problems of poor dynamic and static speed tracking progress, increased costs, and motor instability.

Inactive Publication Date: 2018-07-06
QINGDAO UNIV
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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 overcome the shortcomings of the prior art, aiming at problems such as the instability of the motor caused by the traditional motor speed sensor, the poor progress of dynamic and static speed tracking, and the additional cost increase, a SMC-MRAS speed sensorless tracking control method is proposed. , for faster and more precise real-time tracking control of the motor speed

Method used

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  • Speed sensorless control method of permanent magnet synchronous linear motor
  • Speed sensorless control method of permanent magnet synchronous linear motor
  • Speed sensorless control method of permanent magnet synchronous linear motor

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Experimental program
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Embodiment

[0060] The specific control process of the permanent magnet synchronous linear motor without speed controller described in this embodiment is as follows:

[0061] (1) Determine and analyze the state parameters of the permanent magnet synchronous linear motor, mainly including the dq axis current i of the reference model d and i q and adjustable model dq axis current with Such as figure 1 As shown, the permanent magnet synchronous linear motor is used as a reference model, and the parallel adjustable model is a current model. According to i d and and i q and The error constructs the sliding surface S, where the coordinate transformation abc-αβ formula is:

[0062]

[0063] The transformation formula αβ-dq of the two-phase stationary coordinate system into the two-phase rotating coordinate system is:

[0064]

[0065] Neglecting the magnetic saturation of the motor core, the magnetic permeability of the permanent magnet is 0, ignoring the eddy current loss and ...

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Abstract

The invention belongs to the technical field of motor control, and relates to a speed sensorless control method of a permanent magnet synchronous linear motor. Based on a slip die control principle and a model reference self-adaptive theory, an SMC-MRAS speed observing model is designed; by using a synchronous linear motor itself as a reference model and a motor current model as an adjustable model, a slip die model is structured according to the differential value of output parameters of two models; a Sigmoid function is selected as a switch function; the buffeting of the system is effectively reduced, the speed control precision of the permanent magnet synchronous linear motor is improved; the speed sensorless control method has strong robustness and reliable dynamic and static performances.

Description

Technical field: [0001] The invention belongs to the technical field of motor control, and relates to a speed sensorless control method of a permanent magnet synchronous linear motor, in particular to a control method of a motor requiring high-precision speed. Background technique: [0002] The linear motor is different from the ordinary rotary motor. It is a motor that uses electric energy to generate linear motion. It saves the rotary motion of the traditional rotary motor and can directly perform linear motion. Its biggest feature is that it removes the intermediate drive of the traditional motor drive. Links (such as lead screws, gears or nuts) reduce the length of the feed transmission chain of the operating platform to zero, which realizes "zero transmission" or "direct transmission". The permanent magnet synchronous linear motor can realize non-contact transmission force, small rigidity loss, simple model, long working life, and high feed acceleration up to 20m / s. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/06H02P6/34H02P21/00H02P21/18H02P25/064
CPCH02P6/06H02P6/34H02P21/0007H02P21/0017H02P21/18H02P25/064H02P2207/05
Inventor 王凯李立伟李玉浩周艳婷朱磊董鹏夏国廷齐元豪
Owner QINGDAO UNIV
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