Problems of stator flux estimation in DTC of PMSM drives

Joint Authors

Bin Bu Zayd, Muhammad
Kadjuodj, Muhammad
Julaya, Nur al-Din

Source

المؤتمر الهندسي الدولي الثاني للإعمار و التنمية الجامعة الإسلامية-غزة، 3-4 سبتمبر 2007

Publisher

Islamic University of Gaza Faculty of Engineering

Publication Date

2007-09-30

Country of Publication

Palestine (Gaza Strip)

No. of Pages

13

Main Subjects

Engineering & Technology Sciences (Multidisciplinary)

English Abstract

The DTC of voltage source inverter-fed PMSM is based on hysteresis controllers of torque and flux.

It has several advantages, namely, elimination of the mandatory rotor position sensor, less computation time and fast torque response.

In addition, the stator resistance is the only parameter, which should be known and no reference frame transformation is required.

The DTC theory has achieved great success in the control of induction motor.

However, for the control of PMSM drive proposed a few years ago, there are many basic theoretical problems that must be clarified.

This Paper describes an investigation about the effect of the zero voltage space vectors in the DTC system and points out if using it rationally, not only the DTC of PMSM drive can be driven successfully but torque and flux ripples are reduced and performance of the system is improved.

Modelling and simulation studies have both revealed that a six voltage-vector switching table is more appropriate for PMSM drive at low speed.

In addition, the sources of difficulties, namely, the error in the detection of the initial rotor position, the variation of stator resistance and the offsets in measurements are analysed and discussed.

Data Type

Conference Papers

Record ID

BIM-776072

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