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This paper deals with an on-line method for turn-to-turn short-circuit fault detection in low-voltage permanent-magnet synchronous machine drives. Due to the closed-loop control, the fault effects are reflected in the voltage. Therefore, an appropriate diagnostic index is proposed, which is derived from the positiveand negative-sequences of the voltage(More)
In this paper a new model reference adaptive system observer for estimating the mechanical quantities of a doubly-fed induction generator, namely position, speed and electromagnetic torque and power, is presented. It is based on the computation the air gap power vector, considering saturation by using a variable magnetizing inductance. This algorithm can be(More)
This paper presents a new on-line open-phase and current-sensor fault detection and isolation method for permanent-magnet synchronous generator (PMSG) drives with neutral point voltage control. Simple signal processing implementations for sensor outage and open-phase faults detection are combined with a cumulative-sum (CUSUM) algorithm capable of detecting(More)
This paper focuses on the implementation of LCL filter active damping in the control of an inverter for a three-phase grid emulator application. The studies about LCL damping in the literature focus on the case of an inverter injecting current into the grid while a grid emulator application is rather about establishing correct voltage waveforms and(More)
A combined encoder and rotor-current-sensor fault detection and isolation algorithm for doubly-fed induction machines is presented. A rotor-position and current estimator based on air-gap power vector computation is used for residual generation. A cumulative-sum function permits detecting and isolating the investigated faults. The algorithm is(More)
In this paper a model-based design and testing method focusing on the electric vehicle driveability aspect is proposed. The design approach is divided into two steps. The first step is the Model-in-the-Loop co-simulation coupling a vector-controlled electric drive modelled in MATLAB/Simulink to a planar forward-facing electric vehicle LMS Imagine. Lab(More)
This paper deals with the two-dimensional (2D) finite-element (FE) and magnetic-equivalent-circuit (MEC) modelling of an existing 10 kW brushed wound-field DC machine, taking magnetic cross-saturation into account. The 2D FE model allows to thoroughly investigate the demagnetizing effect of the armature current on the pole flux and the cross-saturation(More)
This paper presents a comparison of soft and hard chopping on an 8/6 SRM in terms of noise, vibration and harshness. Transient-state measurements are used to plot speed-frequency signatures of current, vibration and acoustic noise of the SRM for different load torques. With this technique speed-related frequencies can be distinguished from resonance(More)
This paper proposes an interior-permanent-magnet synchronous generator suitable for wide-speed-range operation and its DC voltage control strategy, which makes this system a promising candidate for 270V DC power system in more electric aircraft applications. The machine is designed and manufactured to have a strong field-weakening capability. An active(More)
This paper investigates the influence of finite-element (FE) mesh when computing eddy currents in magnets of a permanent-magnet synchronous machine excited with pulsating currents (such as pulse-width modulation). 3D computations with globally and locally varying mesh densities are performed and results are compared with a reference (fine-mesh) case. It(More)