English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

IPMSMs and vector control are widely utilized because of thier efficiency(1) and high torque response(2). In addition, much attention about high speed motors has been attracted from the viewpoint of (3) because the high speed operation makes it possible to achieve smaller motor size for specialized applications such as electric vehicles and home appliances, and so on. High-performance digital control processors cannot be employed to achieve low cost system(4), however, so lower cut-off frequency needs to be achieved because the relatively long control period( – often 500μs to 1ms – ) is required. In this situation, the conventional current control system for an IPMSM often degrades and violates stability of the system. In high-speed drives of AC motors, it has been pointed out that unstable current control tends to occur since coupling terms based on electromotive force impair the characteristics of current control ( J.Jung & K.Nam (1999), K.Kondo et al. (1998 (in Japanese) ). These papers have proposed a new dynamic decoupling controller, respectively, under the assumption that the controller’s coordinate (γ − δ) is perfectly aligned with the rotating coordinate fixed to the rotor magnet or rotor flux(d− q). Hence, it is easily expected that this instability problem tends to be emphasized when position error between these coordinates occurs, which is often visible in the case of position sensor-less control. In this paper, stability analysis is carried out while considering its application to position sensor-less system (Z.Chen et al. (2003), S.Morimoto et al. (2002), M.Hasegawa & K.Matsui (2008)) , and stable regions are clarified, in which it is especially difficult to control currents on synchronous reference frame at high-speed (K.Tobari et al. (2004 (in Japanese)) . In order Robust Current Controller Considering Position Estimation Error for Position Sensor-less Control of Interior Permanent Magnet Synchronous Motors under High-speed Drives 23

intech ebooks

Robust Current Controller Considering Position Estimation Error for Position Sensor-less Control of Interior Permanent Magnet Synchronous Motors under High-speed Drives