Theta angle iteration compensation method in linear motor vector control

A technology of vector control and linear motor, applied in vector control system, motor generator control, electronic commutation motor control, etc., can solve problems such as θ angle deviation of linear motor control system

Inactive Publication Date: 2005-08-17
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0003] The present invention proposes a θ angle iterative compensation method in the linear motor vector control, which is used to solve the problem of the θ angle de

Method used

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  • Theta angle iteration compensation method in linear motor vector control
  • Theta angle iteration compensation method in linear motor vector control
  • Theta angle iteration compensation method in linear motor vector control

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Embodiment Construction

[0020] The formula that the present invention adopts is described in detail below:

[0021] (1) The input parameter of the θ angle compensation method is the excitation current (i d ), torque current (i q ), the angular velocity equivalent of the motor (ω), the estimated value of the excitation current Torque current estimate Estimator of Angular Velocity Equivalent and the θ angle calculated by measuring its position; the calculation method of θ angle is

[0022] θ = mod ( p d ) * ( 2 π )

[0023] Among them, p is the displacement detected by the displacement sensor, d is the pole distance of the linear motor, and mod is the modulo operation.

[0024] (2) Compensation must first be based on i d i q Estimate the actual value of the θ angle, and the estimated value is obtained by id...

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Abstract

This invention relates to line motor vector control theta iterate compensation method, which belongs to line motor servo movement control method and mainly applied in permanent line motor servo control field. The method comprises the following steps: estimating the real value of theta angle and stabling identification formula; getting n times of theta angle estimation value to compute the above formula after dispersion according to the identification formula. The invention compares the estimation value with the real measured value through repeated iterated compensation to make the theta orderly near the real time.

Description

technical field [0001] The invention belongs to a linear motor servo motion control method, in particular to a θ angle iterative compensation method in linear motor vector control, which is mainly used in the field of permanent magnet linear motor servo control. Background technique [0002] With the development of advanced manufacturing technologies such as precision manufacturing and numerical control, high speed, high efficiency, and high precision have become the development direction of CNC machine tools. Long-stroke permanent magnet linear motors have advantages such as large strokes, high precision, high acceleration, and large thrust. Occupy a unique position in high precision machining. In the linear motor decoupling vector control, the position angle (θ angle) refers to the spatial angle θ between the rotor magnetic pole and the α axis in the α-β coordinate system, as shown in the attached figure 1 shown. At present, the θ angle is mainly obtained by measuring it...

Claims

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Application Information

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IPC IPC(8): H02P21/14
Inventor 艾武张代林陈幼平周祖德金振荣刘凌云杜志强谢经明常雪峰
Owner HUAZHONG UNIV OF SCI & TECH
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