Condition-based maintenance, which includes both diagnosis and prognosis of faults, is a topic growing interest for improving the reliability electrical drives. Bearings constitute large portion failures in rotational machines. Although many techniques have been successfully applied bearing fault diagnosis, particularly predicting remaining useful life (RUL) bearings, challenge. The main reasons this are lack accurate physical degradation models limited labeled training data. In paper, we...

This paper presents a detailed comparative evaluation of several direct torque control (DTC) strategies for permanent magnet synchronous machines (PMSMs), namely basic DTC, model predictive DTC (MPDTC) and with duty ratio modulation (DTC-duty). Moreover, field orient (FOC) is also included in this study. The aforementioned are reviewed their performances analyzed compared. comparison carried out through simulation 60 kW PMSM fed by two-level voltage source inverter (VSI). With the intent to...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> The detection of noncatastrophic faults in conjunction with other factors can be used to determine the remaining life an electric drive. As frequency and severity these increase, working drive decreases, leading eventual failure. In this paper, four methods identify developing electrical are presented compared. They based on short-time Fourier transform, undecimated-wavelet analysis, Wigner...

A lumped parameter thermal analysis of permanent magnet motor by considering real driving duty cycle is presented. As motors electric vehicle, exhibit high efficiency and power density. However, they are susceptible to suffer irreversible demagnetization insulation failure coils under severe condition. Therefore, it essential accurately evaluate heat losses precisely predict temperature distribution in the cycle. In this paper, an improved core loss model employed implemented using finite...

In this paper, the motor current/voltage signature analysis and linear discriminant (LDA) are evaluated with respect to accuracy detect status of permanent magnet synchronous machines (PMSMs) whether it is healthy or faulted, determine type that fault, estimate severity in case static eccentricity turn-to-turn short-circuit fault. Three types faults discussed: eccentricity, short circuit, partial demagnetization Two-dimensional finite element (FEA) used model simulate machine under faulted...

The limitations of the thermal, vibration, or electrical monitoring electric machines such as false indications, low sensitivity, and difficulty fault interpretation have recently been exposed. This has led to a shift in direction research toward applying new techniques for improving reliability condition monitoring. With changing environment, purpose this article is provide an overview recent trends industrial demand activity technology. developments insulation testing, flux analysis,...

Синтез алгоритма векторной широтно-импульсной модуляции в девятифазном активном выпрямителе напряжения

The detection of noncatastrophic faults in conjunction with other factors can be used to determine the remaining life an electric drive. As frequency and severity these increase, working drive decreases, leading eventual failure. In this paper, methods are presented identify developing electrical mechanical based on both short-time Fourier transform wavelet analysis field-oriented currents permanent-magnet ac drives. different fault types classified by a linear discriminant classifier coefficients.

Improvements in hybrid electric vehicle fuel economy with reduced emissions strongly depend on their supervisory control strategy. In order to develop an efficient real-time strategy for a series bus, the proposed equivalent consumption optimal is compared two popular strategies, thermostat and power follower, using backward simulations ADVISOR. For given driving cycles, global solutions were also obtained dynamic programming provide optimization target comparison purposes. Comparison showed...

Diagnosis classifies the present state of operation equipment, and prognosis predicts next its remaining useful life. In this paper, a method for gear faults in dc machines is presented. The proposed uses time–frequency features extracted from motor current as machine health indicators future fault severity using hidden Markov models (HMMs). Parameter training HMMs generally needs huge historical data, which are often not available case electrical machines. Methods computing parameters...

We present a faster and simpler approach for the calculation of iron magnet losses torque an interior permanent-magnet synchronous machine (IPMSM) than finite-element methods (FEM). It uses magnetic equivalent circuit (MEC) based on large elements takes into account saturation eddy currents. The is represented by nonlinear constant reluctance flux sources. Solution obtained iterative method. results allow machine. Due to approximations used in formulation MEC, this method less accurate but...

This study presents a method to mitigate and alleviate the effects produced by turn-to-turn short in fault tolerant permanent magnet synchronous motor with single-layer concentrated windings. The rotor magnets are capable of inducing high voltage across contact point; this has potential generate circulating current that promotes rapid propagation due thermal stress created increased localized power losses. scope is for applications where postfault operation desired, even if it means...

Electric discharge machining current causes a significant amount of damage to bearings, producing pits in the rotating elements bearing, and ultimately leading bearing failure. Although this relationship is well known studied, little work has been done relate events vibrations for failure prognosis. This paper proposes both experimental computational approaches remaining useful life (RUL) estimation bearings by taking advantage between vibration signal. A test bed, which induces accelerated...

Pole-phase modulation adjusts the pole-phase ratio of an induction machine and requires a multileg, multiphase inverter. This paper analyzes n-leg n-phase inverter presents techniques for space vector pulse width (SVPWM). In particular, nine-phase SVPWM is developed implemented on nine-winding machine. The compared to sine-triangle PWM in terms dc bus utilization.

The development of portable devices that make the reliable diagnosis faults in electric motors possible has become a challenge for many researchers and maintenance enterprises. These machines intervene huge amount processes applications their eventual failure may imply important costs terms time money. However, aforementioned issue remains unsolved because most developed fault techniques rely on user expertise, since they are based qualitative interpretation results. This complicates...

This paper proposes a Condition-Based Maintenance and Prognostics Health Management (CBM/PHM) methodology for rotor bar in an induction motor, based on the results of fatigue test intended to reproduce most natural way breakage order carry out comparison between transient stationary diagnosis methods incipient fault detection.Newly developed techniques stator current analysis have allowed tracking developing during last part test, identifying failure mechanism establishing physical model...

Different faults in permanent magnet synchronous machines (PMSMs) cause various and independent changes to the machine magnetic flux distribution, which affect parameters performance. These are reflected linkages can be estimated from voltages. In this paper, we continue work of Haddad et al., where a method was proposed detect separate three types PMSMs: 1) static eccentricity; 2) demagnetization; 3) turn-to-turn short circuit. The here is based on using change commanded d- q-axis voltages,...

We consider field-oriented speed control of induction motors without mechanical sensors. augment the traditional approach with a flux observer and derive sixth-order nonlinear model that takes into consideration error in estimation. A high-gain is included to estimate from currents voltages. The design independent feedback controller design. By high-gain-observer theory, we define virtual output for model, which can now be used whose performance recovered by when gain chosen high enough....

To develop an efficient real-time supervisory control strategy for a series hybrid electric bus, three kinds of popular strategies were compared in principle; backward simulations ADVISOR conducted these strategies. Comparative simulation results shows that thermostat makes the internal combustion engine operate at its most condition; power follower is helpful to reduce battery usage, hence, loss associated with charging and discharging extend life; equivalent fuel consumption proposed this...

Fault diagnosis and its extensions to failure prognosis aim develop methods that decrease outages thus increase reliability. Among these are redundancies changes of topology, power levels, control algorithms. Since imperfect, false positives negatives, as well delayed fault diagnosis, may occur. Although the a can lead appropriate maintenance, estimation time through timely mitigation and, in turn, extend lifetime reliability drive. In this paper, we present new approach permanent-magnet ac...

A significant portion of faults experienced by electrical machines is caused degraded insulation. In order to reduce the effects a failure, it important monitor health insulation, preferably while machine continues operation without any expensive equipment. this paper, an online method calculate remaining useful lifetime (RUL) stator insulation with simple equipment proposed. The accelerated degradation testing was performed exposing electric high temperatures. An extended Kalman filter...

In this article, we try to bridge the gap between knowledge of effects bearing currents as they may occur with modern power electronics-based variable-speed drives and prediction a bearing's remaining useful life (RUL). We discuss measurements used procedures methods that have been developed. identify what consider be necessary next steps open questions exist well actions establish tools for reliable estimation RUL bearings using different characteristics costs.

Permanent magnet synchronous machines work with controllers and controller parameters affect the machine's voltages currents and, thus, diagnosis of stator winding fault. One such parameter is current bandwidth that affects harmonic content in these signals. In literature, second harmonics both dq-axis have been used for fault detection, main advantage interturn short-circuit (ITSC) a few shorted turns, specially one turn, can be detected. indicator combines information instantaneous...

The main objective of this paper is to propose a method detect the presence fault in Permanent Magnet Synchronous Machines (PMSMs), determine type that and estimate severity case eccentricity fault. In paper, three types faults are discussed: static eccentricity, inter-turn short circuit, demagnetization faults. machine controlled using phase current source harmonics stator voltage used as detailed features for classifier detection. Two dimensional (2-D) Finite Element Analysis (FEA) model...