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Stabilization of regenerating-mode operation in sensorless induction motor drives by full-order flux observer design
TLDR
This paper deals with the full-order flux observer design for speed-sensorless induction motor drives, and it is shown that the observer using the proposed speed-adaptation law does not have the unstable region.
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Modified integrator for voltage model flux estimation of induction motors
This paper deals with voltage model flux estimators for speed sensorless induction motor drives. In order to eliminate the drift problems, the pure integrator of the voltage model is replaced with a…
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Complete Stability of Reduced-Order and Full-Order Observers for Sensorless IM Drives
TLDR
All gain selections, which give stability for all operating conditions, including the regeneration mode, are found, and it is shown that full- order observers, under the assumption of fast stator-current dynamics, have equivalent implementations as reduced-order observers.
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Observer-Based State-Space Current Controller for a Grid Converter Equipped With an LCL Filter: Analytical Method for Direct Discrete-Time Design
State-space current control enables high dynamic performance of a three-phase grid-connected converter equipped with an LCL filter. In this paper, observer-based state-space control is designed using…
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Robust Analytic Design of Power-Synchronization Control
TLDR
This paper addresses robust design of the active-power and dc-link control loops of power-synchronization control by using analytic gain selections, which give large enough stability margins to allow robust stability irrespective of the grid strength and of the operating point.
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State Observer for Grid-Voltage Sensorless Control of a Converter Equipped With an LCL Filter: Direct Discrete-Time Design
Synchronization with the power system is an essential part of control of grid-connected converters. This paper proposes a grid-voltage sensorless synchronization and control scheme for a converter…
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Control of induction motor drives equipped with small DC-Link capacitance
TLDR
Simulation results of a 110-kW drive show that the proposed scheme stabilizes the DC link and the dynamic performance is comparable with that of the conventional drive.
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State Observer for Grid-Voltage Sensorless Control of a Converter Under Unbalanced Conditions
TLDR
Experimental results show that the proposed method for grid-voltage sensorless synchronization and control under unbalanced grid conditions works well even under highly unbalanced grids.
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Loss-Minimizing Flux Level Control of Induction Motor Drives
This paper applies a dynamic space-vector model to loss-minimizing control in induction motor drives. The induction motor model, which takes hysteresis losses and eddy-current losses as well as the…
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Sensorless control of PMSM drives using a combination of voltage model and HF signal injection
This paper presents a method for the rotor speed and position estimation of permanent magnet synchronous motors in a wide speed range including standstill. The proposed method is based on a modified…
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