Deadbeat-Direct Torque and Flux Control of Interior Permanent Magnet Synchronous Machines With Discrete Time Stator Current and Stator Flux Linkage Observer

This paper presents a discrete time deadbeat-direct torque and flux controller (DB-DTFC) for interior permanent magnet synchronous machines (IPMSMs). A Gopinath-style discrete time flux linkage observer is developed which contains two different flux estimation methods based on current and voltage mo...

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Bibliographic Details
Published in:IEEE transactions on industry applications 2011-07, Vol.47 (4), p.1749-1758
Main Authors: Jae Suk Lee, Chan-Hee Choi, Jul-Ki Seok, Lorenz, Robert D.
Format: Article
Language:English
Subjects:
Couplings
Current and flux linkage observer
deadbeat control
direct torque control (DTC)
Flux
interior permanent magnet machine
Inverters
Linkages
Mathematical model
Mathematical models
Observers
Permanent magnets
Stators
Synchronous machines
Torque
Voltage control
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Summary:This paper presents a discrete time deadbeat-direct torque and flux controller (DB-DTFC) for interior permanent magnet synchronous machines (IPMSMs). A Gopinath-style discrete time flux linkage observer is developed which contains two different flux estimation methods based on current and voltage models for flux linkage. This observer produces correctly estimated flux linkages needed for accurate DB-DTFC implementation. In order to eliminate the sampling delay due to a characteristic of digital control computation, a complex vector model-based rotor reference frame current observer is also developed. Combining the discrete time current and flux linkage observers, the correct single time step (deadbeat) air-gap torque and stator flux linkage control at the (constant) switching frequency is achieved and experimentally evaluated.
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2011.2154293