Adaptive Low-speed Control of Permanent Magnet Synchronous Motors

Abstract

Most servo control systems generally adopt incremental optical encoders for speed detection when considering cost and performance requirements. For a fixed sampling period, this kind of encoder along with the generally used so-called M method, may degrade the response or even cause the system to become unstable in a low-speed operating region because of the resulting speed detection delay. In this article, a reference model improves low-speed responses; parameter identification by recursive least square error algorithm overcomes the problem of parameter variations and an adaptive proportional-integral control strategy based on the parameter identification results further justifies the proposed method. A digital signal processor based permanent magnet synchronous motor drive will be used to carry out the experimental results, which show the effectiveness of the proposed method.

Control of energy efficient belt conveyor gearless drummotor

“…For the application of required impulses to semiconductor switch of invertor uses pulse width modulation (PWM) or space vector modulation (SVM). Comparative analyses of existing vector control systems for slow-moving PMSM, which is reproduced in the article [19], concludes that the most appropriate methods are FOC with PWM, DTC with SVM, differential and adaptive control [20][21][22][23]. However, the article [19] gives only theoretical analyses, in a computer simulation (by Matlab Simulink) FOC-PWM system shown the best result.…”

Development of torque vector control system of permanent magnet motor

“…The armature current value along cross axis d enables to regulate motor speed of rotation higher than elementary one with power constancy. In the permanent magnet motor control systems rather complicated laws of current control along the direct axis of the machine are employed, all of them having advantages and disadvantages [2][3][4][5][6][7][8][9]. Figure 1 illustrates the functional diagram of the permanent magnet motor control system having direct rotating reference frame orientation on rotor motor position [4][5][6].…”

“…Different information measuring function transducers of angular and linear movements in electric signal are finding a wide utility in control systems of permanent magnet torque electric motors [2][3][4][5][6]. In some industries tough accuracy and operational requirements to this type of transducers are applied.…”

Precision motion control of permanent magnet linear synchronous motor servo system based on an integrated controller with inertia variation compensation

“…The first group is by automatically tuning the controller parameters according to the actual inertia, which is quite cumbersome and computation consuming. 24,25 The second group is by reshaping the actual plant according to the actual inertia, making the actual plant consistent with the nominal model while the controller parameters remain fixed. 26,27 Both groups of solution mentioned above require accurate knowledge of the actual inertia.…”

“…Recursive least square method and extended Kalman filtering method are also available for inertia identification. 25,26 This article is concerned with the development of a practical integrated controller based on FFV, DOB, ZPETC and inertia compensation for a PMLSM servo system. The following section describes the PMLSM servo system and its dynamic model.…”