This paper compares active and passive cooling systems in tidal turbine power electronic converte... more This paper compares active and passive cooling systems in tidal turbine power electronic converters. The comparison is based on the lifetime of the IGBT (insulated gate bipolar transistor) power modules, calculated from the accumulated fatigue due to thermal cycling. The lifetime analysis accounts for the influence of site conditions, namely turbulence and surface waves. Results indicate that active cooling results in a significant improvement in IGBT lifetime over passive cooling. However, since passive cooling systems are inherently more reliable than active systems, passive systems can present a better solution overall, provided adequate lifetime values are achieved. On another note, the influence of pitch control and active speed stall control on the IGBT lifetime was also investigated. It is shown that the IGBT modules in pitch-controlled turbines are likely to have longer lifetimes than their counterparts in active stall-controlled turbines for the same power rating. Overall, ...
IEEE Transactions on Applied Superconductivity, 2017
This paper aims at finding feasible electromagnetic designs of superconducting synchronous genera... more This paper aims at finding feasible electromagnetic designs of superconducting synchronous generators (SCSGs) for a 10-MW direct-drive wind turbine. Since a lower levelized cost of energy (LCoE) increases the feasibility of SCSGs in this application, twelve generator topologies are compared regarding their LCoE in a simplified form of levelized equipment cost of energy (LCoEeq). MgB2 wires are employed in the field winding. Based on the current unit cost and critical current density capability of the MgB2 wire at 20 K, the topologies with more iron have a much lower LCoEeq than the topologies with more non-magnetic cores. The fully iron-cored topology with salient poles has the lowest LCoEeq. Then a scenario study shows that the difference of LCoEeq between the topologies will become much smaller when the unit cost of the MgB2 wire drops to a quarter and the current density capability of the MgB2 wire increases to 4 times. Then the topologies with more non-magnetic cores will become comparable to those with more iron. Aiming at a lower LCoEeq to increase the feasibility of SCSGs for large wind turbines, those topologies having the most iron in the core are the most promising for both now and the long term. If low weight is required, the topologies with more non-magnetic cores should be considered.
IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03., 2003
DOI to the publisher's website. • The final author version and the galley proof are versions of t... more DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:
2011 IEEE Power and Energy Society General Meeting, 2011
... The disadvantage is that this type of machine has more eddy-current losses in the magnets and... more ... The disadvantage is that this type of machine has more eddy-current losses in the magnets and the back iron due to sub harmonics. ... [29] PC Robert, RA McMahon, PJ Tavner, JM Maciejowski, TJ Flack, Equivalent circuit for the brushless doubly fed machine (BDFM) including ...
Abstract Peec-Power BV is developing high power range extender for hybrid electric vehicles. The ... more Abstract Peec-Power BV is developing high power range extender for hybrid electric vehicles. The first generator designs for range extender have been built and tested in the laboratory. The prototype generators use a permanent magnets with a radial flux type. ...
This paper compares active and passive cooling systems in tidal turbine power electronic converte... more This paper compares active and passive cooling systems in tidal turbine power electronic converters. The comparison is based on the lifetime of the IGBT (insulated gate bipolar transistor) power modules, calculated from the accumulated fatigue due to thermal cycling. The lifetime analysis accounts for the influence of site conditions, namely turbulence and surface waves. Results indicate that active cooling results in a significant improvement in IGBT lifetime over passive cooling. However, since passive cooling systems are inherently more reliable than active systems, passive systems can present a better solution overall, provided adequate lifetime values are achieved. On another note, the influence of pitch control and active speed stall control on the IGBT lifetime was also investigated. It is shown that the IGBT modules in pitch-controlled turbines are likely to have longer lifetimes than their counterparts in active stall-controlled turbines for the same power rating. Overall, ...
IEEE Transactions on Applied Superconductivity, 2017
This paper aims at finding feasible electromagnetic designs of superconducting synchronous genera... more This paper aims at finding feasible electromagnetic designs of superconducting synchronous generators (SCSGs) for a 10-MW direct-drive wind turbine. Since a lower levelized cost of energy (LCoE) increases the feasibility of SCSGs in this application, twelve generator topologies are compared regarding their LCoE in a simplified form of levelized equipment cost of energy (LCoEeq). MgB2 wires are employed in the field winding. Based on the current unit cost and critical current density capability of the MgB2 wire at 20 K, the topologies with more iron have a much lower LCoEeq than the topologies with more non-magnetic cores. The fully iron-cored topology with salient poles has the lowest LCoEeq. Then a scenario study shows that the difference of LCoEeq between the topologies will become much smaller when the unit cost of the MgB2 wire drops to a quarter and the current density capability of the MgB2 wire increases to 4 times. Then the topologies with more non-magnetic cores will become comparable to those with more iron. Aiming at a lower LCoEeq to increase the feasibility of SCSGs for large wind turbines, those topologies having the most iron in the core are the most promising for both now and the long term. If low weight is required, the topologies with more non-magnetic cores should be considered.
IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03., 2003
DOI to the publisher's website. • The final author version and the galley proof are versions of t... more DOI to the publisher's website. • The final author version and the galley proof are versions of the publication after peer review. • The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal. If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User Agreement:
2011 IEEE Power and Energy Society General Meeting, 2011
... The disadvantage is that this type of machine has more eddy-current losses in the magnets and... more ... The disadvantage is that this type of machine has more eddy-current losses in the magnets and the back iron due to sub harmonics. ... [29] PC Robert, RA McMahon, PJ Tavner, JM Maciejowski, TJ Flack, Equivalent circuit for the brushless doubly fed machine (BDFM) including ...
Abstract Peec-Power BV is developing high power range extender for hybrid electric vehicles. The ... more Abstract Peec-Power BV is developing high power range extender for hybrid electric vehicles. The first generator designs for range extender have been built and tested in the laboratory. The prototype generators use a permanent magnets with a radial flux type. ...
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Papers by Henk Polinder