Electrical ageing modeling of the insulation of low voltage rotating machines fed by inverters with the design of experiments (DoE) method

Abstract

In the context of more electric aircrafts, the reliability of the low voltage insulation systems in rotating machines is an important issue. But, modeling and understanding their electrical ageing is a complex phenomenon especially when they are fed by PWM inverter. They involve a large amount of parameters related to both operating conditions and material design, which act together. Accelerated ageing tests are usually run in order to describe the electrical ageing process and to determine the lifetime of these materials. Nevertheless, full ageing tests with all the various parameters for different samples become rapidly time consuming. Moreover, there is not any complete model for insulation lifetime prediction under accelerated ageing tests. In this paper work, we propose a method based on the design of experiments (DoE) method, which is a useful statistical approach that would lead to a reliable and significant interpretation of the different ordering parameters of the insulation ageing process. Moreover, this method will help to reduce the number of required experimental or numerical trials and will, take into account the possible failure mechanisms and the various synergetic effects between them. Using the (DoE) method, a preliminary model of the insulation "lifetime" is presented with respect to the most important parameters at play and interactions between them.Keywords: insulating and magnetic materials, remaining life models, ageing tests, design of experiments; ageing model I.

Design of experiment (DOE) for microstrip transmission line in RF and microwave undergraduate course

“…It has many advantages especially in the line of chemistry and mechanics, and has also been implemented in circuit development and devices [7]. In engineering education, DOE have been used as a tool in determining interactions between factors in a design.…”

“…More significant effort or comprehensive investigation needed, to study exclusively the depth or penetration of DOE/ Taguchi experiments in the industry. However, there are publications showing significant DOE impact in certain fields of study or research, where factors affecting the design process are known and improved [5][6][7][8][9][10][11][12].…”

Equivalent circuit model estimation of induction machines under elevated temperature conditions

“…Various applications for models in this field are in the area of machine design [1], [2], condition monitoring for diagnosis [3], [4], ageing [5], modelling the machine temperature for cooling purposes [6], [7], and for control system design [8]. As a result of the recent use of electric machines in hybrid electric vehicles (HEVs), more research has focused on modelling the high frequency effects as a result of adjustable speed drives being incorporated into the power train which involve high frequency switching [9], [10].…”

Induction Machine Insulation Health State Monitoring Based on Online Switching Transient Exploitation

“…To further investigate these effects, the modeling of the behavior of electrical machines in case of fast voltage switching has been realized. The results in [11] and [12] show that the electrical stress due to the high rate of voltage rise in case of PWM inverter operation influences the lifetime of the insulation material. However, the experimental results show that the magnitude of the applied voltage and the temperature are influencing the lifetime more than the frequency of the applied voltage (switching frequency in case of inverter-fed operation).…”