Sensorless Direct Torque and Flux-Controlled IPM Synchronous Motor Drive at Very Low Speed Without Signal Injection

This paper proposes a novel speed-sensorless direct torque and flux control scheme for an interior permanent-magnet synchronous motor drive. The drive uses a new stator flux observer based on the extended rotor flux concept. Due to the simultaneous implementation of stationary and rotating reference...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2010-01, Vol.57 (1), p.395-403
Main Authors: Foo, G., Rahman, M.F.
Format: Article
Language:English
Subjects:
AC motor drives
Couplings
direct torque and flux control (DTFC)
Estimation error
extended rotor flux
interior permanent-magnet (IPM) synchronous motor (IPMSM)
Inverters
Lyapunov method
Lyapunov methods
Rotors
Sensorless control
stator flux observer
stator resistance estimation
Stators
Synchronous motors
Torque control
variable-speed drives
Voltage
zero speed
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper proposes a novel speed-sensorless direct torque and flux control scheme for an interior permanent-magnet synchronous motor drive. The drive uses a new stator flux observer based on the extended rotor flux concept. Due to the simultaneous implementation of stationary and rotating reference frames, the proposed observer does not require any speed adaptation and is inherently sensorless. Unlike speed adaptive observers, the proposed observer is immune to speed estimation errors; thus, its performance at very low speed is improved significantly. A novel stator resistance estimator is incorporated into the sensorless drive to compensate the effects of stator resistance variation. The global asymptotic stabilities of both the flux observer and stator resistance estimator are guaranteed by the Lyapunov stability analysis. Simulation and experimental results at very low speeds, including 0 and 5 r/min, confirm the effectiveness of the proposed method.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2009.2030815