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Sensorless field oriented control for five-phase induction motors with third harmonic injection and fault insensitive feature
Abstract
The paper presents a solution for sensorless field oriented control (FOC) system for five-phase induction motors with improved rotor flux pattern. In order to obtain the advantages of a third harmonic injection with a quasi-trapezoidal flux shape, two vector models, α1–β1 and α3–β3, were transformed into d1– q1, d3– q3 rotating frames, which correlate to the 1st and 3rd harmonic plane respectively. A linearization approach of the dual machine model in d – q coordinate frames is proposed by introducing a new additional variable “x” which is proportional to the electromagnetic torque. By applying the static feedback control law, a dual mathematical model of the five-phase induction motor was linearized to synthesize a control system in which the electromagnetic torque and the rotor flux can be independently controlled. The results shows the air gap flux shape in steady as well transient states under various load conditions. Moreover, the implemented control structure acquires fault tolerant properties and leads to possible emergency running with limited operation capabilities. The fault-tolerant capability of the analyzed machine was guaranteed by a special implemented control system with a dedicated speed observer, which is insensitive to open-phase fault situation. The experimental tests have been performed with single and double-open stator phase fault. A torque measurement was implemented to present the mechanical characteristics under healthy and faulty conditions of the drive system.
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- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
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Bulletin of the Polish Academy of Sciences-Technical Sciences
no. 67,
pages 253 - 262,
ISSN: 0239-7528 - Language:
- English
- Publication year:
- 2019
- Bibliographic description:
- Wilczyński F., Strankowski P., Guziński J., Morawiec M., Lewicki A.: Sensorless field oriented control for five-phase induction motors with third harmonic injection and fault insensitive feature// Bulletin of the Polish Academy of Sciences-Technical Sciences. -Vol. 67, iss. 2 (2019), s.253-262
- DOI:
- Digital Object Identifier (open in new tab) 10.24425/bpas.2019.128598
- Sources of funding:
- Verified by:
- Gdańsk University of Technology
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