ABSTRACT
IEEE Name :A Study of a Hybrid Filter
Authors: Ostroznik, S.
Hidria d.d, Ljubljana, Slovenia
Bajec. P, Zajec. P.
This paper presents results of a comparative study of two possible hybrid filter topologies, comprised of a passive and active stage, which can be implemented in any general dc supply distribution system. The main filter task is to mitigate current dynamics in the dc distribution system in order to prolong the operational life of delicate dc supplies, i.e., fuel cells, and to reduce the electromagnetic interferences between sensitive electronic circuits connected to the distribution net.
The active stage is incorporated into the passive part in order to:
1) improve its insufficient attenuation in the low-frequency range and
2) source or sink any surplus energy flow between the dc source and load in case of low frequency current dynamics.
Two active stage topologies are proposed, analyzed, and evaluated in detail:
1) an active filter based on a single-leg inverter and
2) an active filter based on an electronic smoothing inductor.
Two active filter topologies were evaluated, e.g., on the active filter based on a single leg inverter and on active filter based on ESI. The advantage of the former is mostly in the lowest frequency range, whereas the latter allows for improved attenuation in the range from 5 to 20 kHz. Other advantages of the ESI concept are the possibility of reducing the filter weight and size, operation at lower nominal voltages in the active filter stage, and the use of ultra capacitors as the main energy storage element.
This paper has proposed improvement of filtering and energy management in automotive applications by using a hybrid filter consisting of a passive and active filterThe focus of future work will be on the design of the proposed filters for commonly applied power ratings used in the automotive applications.
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IEEE Name :A Study of a Hybrid Filter
Authors: Ostroznik, S.
Hidria d.d, Ljubljana, Slovenia
Bajec. P, Zajec. P.
This paper presents results of a comparative study of two possible hybrid filter topologies, comprised of a passive and active stage, which can be implemented in any general dc supply distribution system. The main filter task is to mitigate current dynamics in the dc distribution system in order to prolong the operational life of delicate dc supplies, i.e., fuel cells, and to reduce the electromagnetic interferences between sensitive electronic circuits connected to the distribution net.
The active stage is incorporated into the passive part in order to:
1) improve its insufficient attenuation in the low-frequency range and
2) source or sink any surplus energy flow between the dc source and load in case of low frequency current dynamics.
Two active stage topologies are proposed, analyzed, and evaluated in detail:
1) an active filter based on a single-leg inverter and
2) an active filter based on an electronic smoothing inductor.
Two active filter topologies were evaluated, e.g., on the active filter based on a single leg inverter and on active filter based on ESI. The advantage of the former is mostly in the lowest frequency range, whereas the latter allows for improved attenuation in the range from 5 to 20 kHz. Other advantages of the ESI concept are the possibility of reducing the filter weight and size, operation at lower nominal voltages in the active filter stage, and the use of ultra capacitors as the main energy storage element.
This paper has proposed improvement of filtering and energy management in automotive applications by using a hybrid filter consisting of a passive and active filterThe focus of future work will be on the design of the proposed filters for commonly applied power ratings used in the automotive applications.
Get Your Reports and Power point Presentation
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