Film Capacitors with Low Internal Inductance

1977 ◽  
Vol 13 (4) ◽  
pp. 399-402 ◽  
Author(s):  
D. Loescher ◽  
N. Sidnell
Keyword(s):  
Internal Inductance

Extracting Maximum Power in the Presence of Internal Inductance of Electromagnetic Energy Harvesting Systems

2020 ◽  
Author(s):  
Yamini Sharma ◽  
Lei Zuo
Keyword(s):  
Energy Harvesting ◽  
Electromagnetic Energy ◽  
Maximum Power ◽  
Operating Frequency ◽  
Frequency Range ◽  
Low Frequencies ◽  
Internal Inductance ◽  
Piezoelectric Energy ◽  
Operating Frequency Range ◽  
Electromagnetic Energy Harvesting

Abstract In this paper, the effect of internal inductance of electromagnetic generators in the field of energy harvesting is discussed. Electromagnetic energy harvesters are typically operated at low frequencies. This results in the generator internal inductor impedance being significantly less than the generator internal resistance. However, at high frequencies, this inductance can no longer be ignored. Therefore, to maximize the harvested power, the internal inductance must be considered while designing the power electronics. This paper presents two methods to tackle this issue. The first method involves making use of a discrete capacitor which is able to reduce the inductance effect not just at resonant frequency but for the entire operating frequency range. The second method makes use of a concept similar to synchronized switching harvesting on inductors (SSHI) in piezoelectric energy harvesting. A capacitor and switch are added in the electromagnetic energy harvesting circuit to reduce the generator internal inductance effect. This method not only provides the benefit of performing well in the entire operating frequency range but also eliminates the need for precise maximum power tracking techniques, which further helps in reducing the circuit losses. Simulation results show a maximum power output increase of 56%.

DC Internal Inductance for a Conductor of Rectangular Cross Section

2009 ◽  
Vol 51 (2) ◽  
pp. 338-344 ◽  
Author(s):  
Christopher L. Holloway ◽  
Edward F. Kuester
Keyword(s):  
Cross Section ◽  
Rectangular Cross Section ◽  
Internal Inductance

scholarly journals Robust Sliding Mode Control for Tokamaks

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
I. Garrido ◽  
A. J. Garrido ◽  
M. G. Sevillano ◽  
J. A. Romero
Keyword(s):  
Carbon Dioxide Emissions ◽  
Alternative Energy ◽  
Sliding Mode ◽  
Nuclear Fusion ◽  
Tokamak Plasma ◽  
Nuclear Fusion Reactor ◽  
Internal Inductance ◽  
Lumped Parameter ◽  
Severe Reduction ◽  
Particle Confinement

Nuclear fusion has arisen as an alternative energy to avoid carbon dioxide emissions, being the tokamak a promising nuclear fusion reactor that uses a magnetic field to confine plasma in the shape of a torus. However, different kinds of magnetohydrodynamic instabilities may affect tokamak plasma equilibrium, causing severe reduction of particle confinement and leading to plasma disruptions. In this sense, numerous efforts and resources have been devoted to seeking solutions for the different plasma control problems so as to avoid energy confinement time decrements in these devices. In particular, since the growth rate of the vertical instability increases with the internal inductance, lowering the internal inductance is a fundamental issue to address for the elongated plasmas employed within the advanced tokamaks currently under development. In this sense, this paper introduces a lumped parameter numerical model of the tokamak in order to design a novel robust sliding mode controller for the internal inductance using the transformer primary coil as actuator.

scholarly journals Calculation of Rail Internal Impedance by Using Finite Elements Methods and Complex Magnetic Permeability

2009 ◽  
Vol 2009 ◽  
pp. 1-10 ◽  
Author(s):  
Alberto Dolara ◽  
Sonia Leva
Keyword(s):  
Finite Elements ◽  
Magnetic Permeability ◽  
Magnetization Curve ◽  
Analytical Models ◽  
Internal Parameter ◽  
Internal Inductance ◽  
Internal Impedance ◽  
Normal Magnetization ◽  
Complex Magnetic Permeability ◽  
Finite Elements Methods

The internal parameter of UNI 60 rail is calculated by using finite elements methods. Steel's characterizations by its normal magnetization curve and by complex magnetic permeability are here considered and included into the proposed FEM models. Rail's resistance and internal inductance in function of current and frequency are calculated using both FEM and analytical models. The results obtained at the frequency of 50 Hz are compared with few measurements available, and then they are extended to other frequencies.

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