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Optimal energy harvesting from a high-speed brushless DC generator-based flywheel energy storage system

DSpace at IIT Bombay

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Title Optimal energy harvesting from a high-speed brushless DC generator-based flywheel energy storage system
 
Creator GURUMURTHY, SR
AGARWAL, V
SHARMA, A
 
Subject brushless DC motors
cobalt
flywheels
iron
nickel
power convertors
energy harvesting
optimal energy harvesting
high speed brushless DC generator
flywheel energy storage system
bidirectional power converter
BDC
energy harvesting converter
EHC
voltage boosting mode
voltage gain
operating duty cycle
low loss core material
 
Description Brushless DC (BLDC) motors are highly suitable for usage in high-speed applications like flywheel energy storage. A bidirectional power converter (BDC) interfaces the DC power source to BLDC machine which is coupled to the flywheel. The BDC acts as an energy harvesting converter (EHC) (in voltage boosting mode) during extraction of stored energy from the flywheel. However, usually an optimal energy is not extracted because of limitation on the maximum gain of the EHC and equivalent source resistance (R-s) of the generator. This study presents the effects of generator parameters on EHC and relevant analysis for the extraction of optimum energy stored in the flywheel. Existing literature on a similar system does not consider the effect R-s of the generator on the BDC's performance. If R-L is the load resistance, then as the R-s/R-L ratio increases, maximum voltage gain and operating duty cycle range decrease. R-s can be reduced by designing machine/chokes using low loss core material like nickel-iron or cobalt-iron. This study also deals with the design and implementation of the controller for EHC taking R-s of the generator into consideration. Studies on the effect of R-s on the converter harvestable energy have been conducted and the experimental results are included.
 
Publisher INST ENGINEERING TECHNOLOGY-IET
 
Date 2014-10-16T13:06:18Z
2014-10-16T13:06:18Z
2013
 
Type Article
 
Identifier IET ELECTRIC POWER APPLICATIONS, 7(9)693-700
1751-8660
1751-8679
http://dx.doi.org/10.1049/iet-epa.2013.0134
http://dspace.library.iitb.ac.in/jspui/handle/100/15622
 
Language en