IMP Based Velocity Tracking Controller for Permanent Magnet Stepper Motors

Title
IMP Based Velocity Tracking Controller for Permanent Magnet Stepper Motors
Author
정정주
Keywords
Torque; Forging; Permanent magnet motors; Simulation; Permanent magnets; Stability analysis; Synchronous motors; Lyapunov method; Permanent magnet stepper motor; Internal model principle
Issue Date
2011-05
Publisher
Institute of Electrical and Electronics Engineers
Citation
2011 8th Asian Control Conference (ASCC) Control Conference (ASCC), 2011 8th Asian, 239-244
Abstract
To improve the velocity tracking of permanent magnet stepper motors (PMSMs), the cogging torque must be rejected. Most controllers for PMSMs use direct-quadrature (DQ) transformation to force the mechanical dynamics to become linear. However, feedback control using DQ transformation may be negatively affected by the fact that the commutation is imprecise due to time delay of the current measurements and position encoder feedback. In this paper, an internal model principle (IMP) based velocity tracking controller for PMSMs is proposed to track the desired velocity and reject the cogging torque without DQ transformation. The controller consists of a velocity tracking controller and IMP to reject the cogging torque. The controllers for mechanical dynamics and electrical dynamics are independently designed. The velocity tracking controller generates the desired torque to track the desired velocity. A commutation scheme is proposed to determine the desired current for the desired torque. The current tracking controller guarantees the desired current. We propose field oriented control (FOC) for this scheme. The stability of the closed-loop system is proven using passivity. Since the cogging torque is equal to the sinusoidal disturbance, an add-on type IMP is designed to cancel the cogging torque while preserving the merits and the performance of the predesigned controller and its closed-loop stability. Simulation results are used to demonstrate the performance of the proposed method.
URI
http://ieeexplore.ieee.org/search/searchresult.jsp?queryText=IMP%20Based%20Velocity%20Tracking%20Controller%20for%20Permanent%20Magnet%20Stepper%20Motors&newsearch=truehttp://hdl.handle.net/20.500.11754/41103
ISBN
978-1-61284-487-9; 978-89-956056-4-6
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRICAL AND BIOMEDICAL ENGINEERING(전기·생체공학부) > Articles
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