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This paper presents a thorough literature review on the fault mechanism and diagnostic techniques for a range extender hybrid electric vehicle, which is one of the most feasible electric vehicles. However, extensive fault diagnosis research has been done on the diesel engine or a generator, but studies on the range extender are still limited, which is a coupling device of an engine-generator shaft...
This paper presents a numerical solution of vibration analysis in electric generator, in particular to Flux Reversal Generator (FRG). A three-dimensional finite-element analysis methodology is used. The analysis reports in this paper cover the major vibration sources: mechanical, magnetic, and unbalanced rotor. The following analysis is presented. (i) A 3-D modal analysis, including stator and rotor...
This paper investigates the effects of loading on radial magnetic forces in a low-speed PM machine with non-overlapping concentrated windings. Vibration level of the PM machines with concentrated windings can be potentially higher compared to the traditional machines with distributed windings. It is mainly due to the presence of low order harmonics in the spatial distribution of the radial forces...
Our paper presents an explicit infinite-dimensional Luenberger type observer for a class of vibrating systems. Further numerical investigation is undertaken for the observer based on a rotating Euler elastic beam system, including the eigenvalue distribution of the error system and the robustness of the observer. By using the finite element method numerical simulations are carried out to illustrate...
In order to analyse the free vibration characteristics of hydropower house, finite element method (FEM) is used in the modal analysis. The main emphasis is placed on the problem of influencing factors of the modal analysis for hydropower house. The influencing factors include calculation model range, boundary condition and water in spiral case. Two practical cases are given. The study indicates that...
This paper investigates the dynamic response of steam generator foundation by finite element analysis. To verify the feasibility and effectiveness of the method, a series of parameters of the finite element model were studied. The parameters consist of material character, mesh size, element type, meshing method, boundary treatment, equipment weight, excitation, post treatment and so on. By comparing...
To provide faster, more repeatable and stronger MEMS packaging technology, the dynamic characteristics of ultrasonic transducers are studied using finite element method (FEM), and the ultrasonic generator for driving the transducer is also presented in this paper. The finite element model of the high frequency ultrasonic transducer was established by using ANSYS software, and the vibration characteristics...
To transform endless energy from ambient vibration into useful power. We scavenge mechanical energy and transfer into electrical energy by utilizing piezoelectric materials. We compare generators performance at different situations and then let electric energy be charged to a Ni-MH battery or a capacitor through a full wave rectifier. We also obtain resonance of piezoelectric benders by system identification...
A linear generator harvests which bridge vibration energy is used as the power source for a 3.3 V supply for the wireless sensor. Because of its ironless structure, the generator must be designed using the finite element method (FEM). The prime mover's mass and spring stiffness are analyzed with the vibration energy of the bridge. The linear generator's model is built in FEM package. The dynamic voltage...
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