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Papers by Pascal Maussion

In this article an original solution is proposed by using wasted electric and electronic equipmen... more In this article an original solution is proposed by using wasted electric and electronic equipment (second-life components) to create the new power generation systems for remote rural areas. This frugal innovation for rural electrification guarantees an important support social, educational and economic development goals especially in Southeast Asian countries.

HAL (Le Centre pour la Communication Scientifique Directe), 2008

Cet article traite de la detection de defauts de roulements dans les entrainements electromecaniq... more Cet article traite de la detection de defauts de roulements dans les entrainements electromecaniques par analyse des courants d’alimentation des moteurs electriques. Les defaillances auxquelles nous nous interessons concernent principalement les usures des surfaces de contact ainsi que la perte des proprietes lubrifiantes de la graisse des roulements. Nous mettons a profit certaines signatures frequentielles des courants statoriques pour detecter les oscillations du couple de charge induites par les degradations des roulements.

2015 IEEE 10th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED), 2015

This paper presents and compares different methods for evaluating the relative importance of vari... more This paper presents and compares different methods for evaluating the relative importance of variables involved in insulation lifespan models. Parametric and nonparametric models are derived from accelerated aging tests on twisted pairs covered with an insulating varnish under different stress constraints (voltage, frequency and temperature). Parametric models establish a simple stresslifespan relationship and the variable importance can be evaluated from the estimated parameters. As an alternative approach, non-parametric models explain the stress-lifespan relationship by means of regression trees or random forests (RF) for instance. Regression trees naturally provide a hierarchy between the variables. However, they suffer from a high dependency with respect to the training set. This paper shows that RF provide a more robust model while allowing a quantitative variable importance assessment. Comparisons of the different models are performed on different training and test sets obtained through experiments.

This paper presents and compares statistical methods for evaluating the performance of parametric... more This paper presents and compares statistical methods for evaluating the performance of parametric model estimation for insulation lifespan in the case of small size training sets. Parametric models are derived from accelerated aging tests on twisted pairs covered with an insulating varnish under different stress constraints (voltage, frequency and temperature). The estimation of the parametric model coefficients requires some hypothesis on the lifespan statistical distribution. However, since the number of measurements for each configuration is constrained by the experimental cost, the results given by classical goodness-to-fit tests and graphical tools may be questionable. This paper thus proposes to use the bootstrap technique for a more thorough statistical analysis. Indeed, bootstrap has been specifically designed to infer the statistical properties of an estimator when only few observations are available. In our case of study, the bootstrap technique confirms the results obtain...

(Conférencier invité)International audienc

![Research paper thumbnail of Aircraft`s e.g. airplane, power system e.g. braking system, has synchronous machines connected in parallel to three phase inverter, and drive module supplying inverter and receiving measured values of phase currents](https://a.academia-assets.com/images/blank-paper.jpg)

IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018

This paper investigates some solutions for rural electrification based on re-used components acco... more This paper investigates some solutions for rural electrification based on re-used components according to the frugal innovation concept, such as the association of second-life application of PC Power Supply Units (PSUs). It includes the review of the previous researches on the modification of PSU and the investigation of output voltage, output current responses when connecting two PSU s which have the same, as well as different components' parameters. The main objective is reusing modified PSUs as very cheap battery charge controller in a small solar PV system for remote areas in the least developed countries. The connection of the inputs and the outputs of the two PSU s in serial and/or in parallel in order to increase the power of the system are investigated. Grounding problems either in simulation or experiments are solved. Analysis of the output voltage and current for different configurations in simulations (new PSim scheme) and experiments are presented and the outcomes pr...

IECON 2016 - 42nd Annual Conference of the IEEE Industrial Electronics Society, 2016

Belt-pulley systems are widespread in the industry due to their high efficiency and their low cos... more Belt-pulley systems are widespread in the industry due to their high efficiency and their low cost. However, there are only few works about the monitoring of their degradation. This paper deals with belt looseness detection. It presents an innovative method based on the application of a square-wave speed reference in order to monitor belt looseness. A statistical-based indicator is computed from the Fourier series coefficients of the pattern provoked by the square wave. This indicator is tested on a 30 kW induction machine and a direct-current machine coupled with two trapezoidal belts for two speeds and two load conditions. Results are compared to those obtained with a more classical harmonic approach. It reaches very good results and allows 100% detection of strong belt looseness faults without any false alarms. Moreover results are robust to speed and load variations.

IEEE Transactions on Industrial Informatics, 2017

Belt-pulley systems are widely used in the industry due to their high efficiency and their low co... more Belt-pulley systems are widely used in the industry due to their high efficiency and their low cost. However, only few works exist about the monitoring of their degradation. This paper details the impact of belt looseness on electrical measurements under steady and transient state in order to identify spectral signatures. This analysis enlightens the advantage of the transient state to detect belt looseness because it exacerbates belt slip. An innovative methodology is then proposed based on the application of a square-wave speed reference in order to monitor belt looseness. A statistical-based indicator is defined from the phase currents in order to automatically detect drifting of the indicator. A normalization process is also applied to increase the detection robustness. The proposed indicator is evaluated on a 30-kW induction machine and a directcurrent machine coupled with two trapezoidal belts for three speed and four load conditions. It reaches very good results with almost 90% correct detections for 1% false alarms. These results are way better than those obtained with a classic spectral analysis during the steady state. Moreover, results demonstrate that higher load conditions are more accurate for the monitoring of belt looseness.

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

Organic light emitting diodes are one of the most innovative light sources. They do not require s... more Organic light emitting diodes are one of the most innovative light sources. They do not require semiconductor fabrication techniques like the LED family, they are simple to construct and are used in many original applications. The inconvenient of this product is that it does not have a long lasting useful life with more then 10000 hours. Therefore, this paper will present a parametric method to design an aging model of the OLED, based on luminance decay and electrical impedance evolution. Accelerated tests using thermal factor and current will be applied to large warm white OLED panels. A Gaussian model for the luminance decay and a linear model for the impedance characteristics will be merged with design of experiments method to include the stress factors, resulting in an effective degradation model that can estimate the lifetime of the OLED.

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), 2021

2017 IEEE Industry Applications Society Annual Meeting, 2017

The electrical insulation of low voltage motors faces new hazards since the power electronic powe... more The electrical insulation of low voltage motors faces new hazards since the power electronic power supplies have been introduced. Due to the use of frequency inverters especially the primary insulation of the magnet wire is endangered. As an effect, partial discharges may be observed, causing fast degradation of the electrical insulation leading finally to a premature breakdown of the machine. In order to predict the lifespan of the insulation system the aging tests are conducted. Unfortunately, they are usually highly time consuming and far too accelerated to properly model the aging phenomena. The aim of this paper is to propose a method allowing to predict the long-term results basing only on the short-term experimental results. This study introduces a prediction based on the Design of Experiments method and the Weibull distribution. Thanks to the model obtained with short aging tests it is possible to predict the results of significantly longer ones. Moreover, the adapted methodology is proposed that allows to predict the scatter of the long tests basing on the short-time results dispersion. The predictions are compared with the experimental data in order to prove the model accuracy.

IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, 2020

This paper studies some original solutions for rural electrification based on re-used components ... more This paper studies some original solutions for rural electrification based on re-used components according to the frugal innovation concept. Several associations of recycled PSUs from PCs, for an hybrid renewable energy system (PV and hydro) are presented and investigated. The objective is to increase the system power by associating several units. These power supply’s converters can be controlled as battery chargers and supervised by MPPT algorithms implemented in an Arduino microcontroller. The different configurations for serial/parallel associations of the inputs or the outputs are investigated in terms of feasibility, robustness, and performance trough simulation and experimental results. Moreover, the settings of the whole system are given to the microcontroller by an application implemented in an Android smartphone.

2016 IEEE Industry Applications Society Annual Meeting, 2016

This paper presents a new configuration of multi-phase induction heating system and its control s... more This paper presents a new configuration of multi-phase induction heating system and its control scheme. Instead of using separate voltage inverters to supply the required currents in the inductors in each phase, the inverters will be arranged in a special configuration in order to reduce the number of power switches. A modification in the setting parameters of the formers will make sure the best operation of the system. Optimal references are obtained through a specific optimization procedure and several solutions are tested for neutral current minimization, including a new arrangement of the coils. In addition, current control in the different phases is achieved thanks to proportional-resonant controllers. The application is currently developed on a reduced power 3-phase coupled resonant test bench from which simulation and experimental results are provided.

2015 IEEE International Electric Machines & Drives Conference (IEMDC), 2015

This paper presents modeling, simulation and experimental results of a three phase induction moto... more This paper presents modeling, simulation and experimental results of a three phase induction motor running as single phase generator. Modeling is performed on a small power induction motor with squirrel cage, one phase for excitation and the others for load supply It includes a new model of the total losses, i.e. mechanical, copper and iron losses thanks to the design of experiment method (DoE). Experimental results obtained in Cambodia for load and voltage excitation variations on a reduced power test bench are good agreement with simulations, confirming the validity of the proposed models. Target application is electricity production form pico-hydropower in rural areas in developing countries.

IEEE Transactions on Industry Applications, 2013

This paper presents a numerical model of High Pressure Sodium (HPS) lamps including the acoustic ... more This paper presents a numerical model of High Pressure Sodium (HPS) lamps including the acoustic streaming. The model is implemented in COMSOL and based on the finite elements method using a 2D axi-symmetric geometry. Moreover, a revision concerning AR experimental characterizations of HPS lamps will also be provided. The results presented in this paper will contribute to the understanding of AR phenomena and help in the electronic ballast design methods for AR avoidance.

IEEE Transactions on Industry Applications, 2011

In the last decades, the high pressure sodium (HPS) lamp has been supplied in high frequency in o... more In the last decades, the high pressure sodium (HPS) lamp has been supplied in high frequency in order to increase the efficacy of the lamp/ballast system. However, at some given frequencies, standing acoustic waves, namely acoustic resonance (AR), might develop in the burner and cause lamp luminous fluctuation, extinction and destruction in the most serious case. Two main characteristics of the acoustic resonances in a 150W HPS lamp are presented in this paper and we seek for a control method to avoid the lamp AR. The first one is the characteristic of the lamp AR threshold power, and the second one is the differences between forward and backward frequency scanning effects. Both characteristics allow us to further understand the AR and to better control the lamp.