The Experts below are selected from a list of 414 Experts worldwide ranked by ideXlab platform
Zirker Larry - One of the best experts on this subject based on the ideXlab platform.
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Diesel Engine Idling Test
'Office of Scientific and Technical Information (OSTI)', 2006Co-Authors: Zirker Larry, Francfort James, Fielding JordonAbstract:In support of the Department of Energy’s Freedomcar and Vehicle Technology Program Office goal to minimize diesel engine idling and reduce the consumption of millions of gallons of diesel fuel consumed during heavy vehicle idling periods, the Idaho National Laboratory (INL) conducted tests to characterize diesel engine wear rates caused by extended periods of idling. INL idled two fleet buses equipped with Detroit Diesel Series 50 engines, each for 1,000 hours. Engine wear metals were characterized from weekly oil analysis samples and destructive filter analyses. Full-flow and the bypass filter cartridges were removed at four stages of the testing and sent to an oil analysis laboratory for destructive analysis to ascertain the metals captured in the filters and to establish wear rate trends. Weekly samples were sent to two independent oil analysis laboratories. Concurrent with the filter analysis, a comprehensive array of other laboratory tests ascertained the condition of the oil, wear particle types, and ferrous particles. Extensive ferrogram testing physically showed the concentration of iron particles and associated debris in the oil. The tests results did not show the dramatic results anticipated but did show wear trends. New West Technologies, LLC, a DOE support company, supplied technical support and data analysis throughout the idle test
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Oil Bypass Filter Technology Evaluation Eleventh Quarterly Report: April -June 2005
'Office of Scientific and Technical Information (OSTI)', 2005Co-Authors: Zirker Larry, Francfort James, Fielding JordanAbstract:This Oil Bypass Filter Technology Evaluation quarterly report (April–June 2005) details the ongoing fleet evaluation of engine oil bypass filter technologies being conducted by the Idaho National Laboratory (INL) for the U.S. Department of Energy’s Freedomcar & Vehicle Technologies Program. Eleven INL four-cycle diesel-engine buses and six INL Chevrolet Tahoes with gasoline engines are equipped with oil bypass filter systems. Eight of the buses and the six Tahoes are equipped with oil bypass filters from the puraDYN Corporation; the remaining three buses are equipped with oil bypass filters from Refined Global Solutions. Both the puraDYN and Refined Global Solutions bypass filters have a heating chamber to remove liquid contaminates from the engine oil. During the April to June 2005 reporting quarter, the eleven diesel engine buses traveled 85,663 miles. As of June 30, 2005, the buses had accumulated 829,871 total test miles. During this quarter, seven regularly scheduled 12,000-mile bus service events were performed. Bus 73449 had its oil accidentally changed on 5/17/05 during servicing. Two buses had mechanical problems which required the oil to be changed: Bus 73446 had an injector failure and Bus 73413 had a broken “dip stick” fitting on the oil pan, both of which introduced contaminants. Buses 73432 and 73433 began the idling phase of the INL Diesel Engine Idling Wear-Rate Evaluation Test. Throughout the 35 months of evaluation, only six oil changes were performed on the INL buses because of degraded oil quality from normal operations. This is a 90% reduction of oil consumption (490 gallons saved) and a concurrent 90% reduction (490 gallons) of waste oil generation. Another six oil changes were performed due to mechanical problems and accidental oil changes. The six Tahoe test vehicles traveled 28,688 miles, and as of June 30, 2005, the Tahoes had accumulated 260,116 total test miles
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U.S. Department of Energy Freedomcar & Vehicle Technologies Program Oil Bypass Filter Technology Evaluation - Sixth Quarterly Report, January - March 2004
'Office of Scientific and Technical Information (OSTI)', 2004Co-Authors: U.s. Department Of Energy, Zirker LarryAbstract:This Oil Bypass Filter Technology Evaluation quarterly report (January-March 2004) details the ongoing fleet evaluation of an oil bypass filter technology by the Idaho National Engineering and Environmental Laboratory (INEEL) for the U.S. Department of Energy's Freedomcar & Vehicle Technologies Program. Eight four-cycle diesel-engine buses used to transport INEEL employees on various routes have been equipped with oil bypass filter systems from the puraDYN Corporation. The bypass filters are reported to have engine oil filtering capability of
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U.S. Department of Energy Freedomcar & Vehicle Technologies Program Oil Bypass Filter Technology Evaluation Fifth Quarterly Report October - December 2003
'Office of Scientific and Technical Information (OSTI)', 2004Co-Authors: Zirker Larry, Francfort JamesAbstract:This Oil Bypass Filter Technology Evaluation quarterly report (October-December 2003) details the ongoing fleet evaluation of an oil bypass filter technology by the Idaho National Engineering and Environmental Laboratory (INEEL) for the U.S. Department of Energy's Freedomcar & Vehicle Technologies Program. Eight four-cycle diesel-engine buses used to transport INEEL employees on various routes have been equipped with oil bypass filter systems from the puraDYN Corporation. The bypass filters are reported to have engine oil filtering capability of
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Oil Bypass Filter Technology Evaluation, Eighth Quarterly Report, July - September 2004
'Office of Scientific and Technical Information (OSTI)', 2004Co-Authors: Zirker Larry, Francfort James, Fielding JordanAbstract:This Oil Bypass Filter Technology Evaluation quarterly report (July--September 2004) details the ongoing fleet evaluation of an oil bypass filter technology being conducted by the Idaho National Engineering and Environmental Laboratory (INEEL) for the U.S. Department of Energy’s (DOE) Freedomcar & Vehicle Technologies Program. Eight INEEL four-cycle diesel engine buses used to transport INEEL employees on various routes and six INEEL Chevrolet Tahoes with gasoline engines are equipped with oil bypass filter systems from the puraDYN Corporation. The bypass filters are reported to have engine oil filtering capability of
T M Jahns - One of the best experts on this subject based on the ideXlab platform.
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comparison of interior and surface pm machines equipped with fractional slot concentrated windings for hybrid traction applications
IEEE Transactions on Energy Conversion, 2012Co-Authors: Patel Bhageerath Reddy, Jagadeesh Tangudu, Kumkang Huh, A M Elrefaie, T M JahnsAbstract:Electric drive systems, which include electric machines and power electronics, are a key enabling technology for advanced vehicle propulsion systems that reduce the petroleum dependence of the ground transportation sector. To have significant effect, electric drive technologies must be economical in terms of cost, weight, and size while meeting performance and reliability expectations. This paper will provide details of the design, analysis, and testing of two permanent magnet (PM) machines that were developed to meet the Freedomcar 2020 specifications. The first machine is an interior PM (IPM) machine and the second machine is a surface PM (SPM) machine. Both machines are equipped with fractional-slot concentrated windings (FSCW). The goal of this paper is to provide a quantitative assessment of how achievable this set of specifications is, as well as a comparison with the state of the art. This paper will also quantitatively highlight the tradeoffs between IPM and SPM FSCW machines especially in the context of traction applications.
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design analysis and loss minimization of a fractional slot concentrated winding ipm machine for traction applications
Energy Conversion Congress and Exposition, 2011Co-Authors: Jagadeesh Tangudu, T M Jahns, Theodore BohnAbstract:This paper presents details of the design and analysis of a high-performance fractional-slot concentrated winding (FSCW) interior permanent magnet (IPM) machine that has been designed to meet demanding Freedomcar traction machine specifications. Attention is focused on the design of the IPM rotor, including investigations of the impact of varying the magnet height and the depth of the magnet chevron midpoint on key performance metrics. This paper also addresses interaction between the electromagnetic and structural characteristics of the rotor as bridge and post widths are varied. Predicted performance characteristics of the machine are presented and design techniques are described for improving the machine efficiency at high operating speeds. Test results gathered from an experimental machine exhibit promising agreement with the predicted performance.
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comparison of interior and surface pm machines equipped with fractional slot concentrated windings for hybrid traction applications
Energy Conversion Congress and Exposition, 2011Co-Authors: Patel Bhageerath Reddy, Jagadeesh Tangudu, Kumkang Huh, A M Elrefaie, T M JahnsAbstract:Electric drive systems, which include electric machines and power electronics, are a key enabling technology for advanced vehicle propulsion systems that reduce the petroleum dependence of the ground transportation sector. To have significant effect, electric drive technologies must be economical in terms of cost, weight, and size while meeting performance and reliability expectations. This paper will provide details of the design, analysis and testing of two permanent magnet (PM) machines that were developed to meet the Freedomcar 2020 specifications. The first machine is an Interior PM (IPM) machine and the second machine is a surface PM (SPM) machine. Both machines are equipped with fractional-slot concentrated windings (FSCW). The goal of the paper is to provide a quantitative assessment of how achievable this set of specifications is as well as a comparison with the state of the art. The paper will also quantitatively highlight the tradeoffs between IPM and SPM FSCW machines especially in the context of traction applications.
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effect of back emf constraints on fractional slot surface pm machines designed for wide constant power speed range operation
Electric Power Components and Systems, 2008Co-Authors: Ayman Mohamed Fawzi Elrefaie, T M Jahns, John W MckeeverAbstract:Abstract This article investigates the tradeoffs that result from constraining the back-emf at maximum speed for fractional-slot surface permanent magnet (SPM) machines. Two 55 kW (peak) SPM machines designed to meet requirements established in the US Freedomcar program are used as the basis for this investigation. The two machines are 36-slot/30-pole SPM fractional-slot concentrated-winding designs that use sintered NdFeB magnets. The first design has no back-emf constraint at maximum speed, allowing it to exceed the 600 V pk l-l limit, while the second design has been designed to meet this requirement. Results of this study show that the introduction of back-emf limits can lead to significant increases in the SPM machine's rated current, with only a modest impact on the machines mass and volume. A combination of closed-form analysis and finite element analysis is used to carry out this investigation.
Francfort James - One of the best experts on this subject based on the ideXlab platform.
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Hybrid Electric Vehicle End-Of-Life Testing On Honda Insights, Gen I Civics And Toyota Gen I Priuses
'Office of Scientific and Technical Information (OSTI)', 2006Co-Authors: Francfort James, Karner Donald, Harkins Ryan, Tardiolo JosephAbstract:This technical report details the end-of-life fuel efficiency and battery testing on two model year 2001 Honda Insight hybrid electric vehicles (HEVs), two model year 2003 Honda Civic HEVs, and two model year 2002 Toyota Prius HEVs. The end-of-life testing was conducted after each vehicle has been operated for approximately 160,000 miles. This testing was conducted by the U.S. Department of Energy’s (DOE) Advanced Vehicle Testing Activity (AVTA). The AVTA is part of DOE’s Freedomcar and Vehicle Technologies Program. SAE J1634 fuel efficiency testing was performed on the six HEVs with the air conditioning (AC) on and off. The AC on and off test results are compared to new vehicle AC on and off fuel efficiencies for each HEV model. The six HEVs were all end-of-life tested using new-vehicle coast down coefficients. In addition, one of each HEV model was also subjected to fuel efficiency testing using coast down coefficients obtained when the vehicles completed 160,000 miles of fleet testing. Traction battery pack capacity and power tests were also performed on all six HEVs during the end-of-life testing in accordance with the Freedomcar Battery Test Manual For Power-Assist Hybrid Electric Vehicles procedures. When using the new-vehicle coast down coefficients (Phase I testing), 11 of 12 HEV tests (each HEV was tested once with the AC on and once with the AC off) had increases in fuel efficiencies compared to the new vehicle test results. The end-of-life fuel efficiency tests using the end-of-life coast down coefficients (Phase II testing) show decreases in fuel economies in five of six tests (three with the AC on and three with it off). All six HEVs experienced decreases in battery capacities, with the two Insights having the highest remaining capacities and the two Priuses having the lowest remaining capacities. The AVTA’s end-of-life testing activities discussed in this report were conducted by the Idaho National Laboratory; the AVTA testing partner Electric Transportation Applications, and by Exponent Failure Analysis Associates
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Diesel Engine Idling Test
'Office of Scientific and Technical Information (OSTI)', 2006Co-Authors: Zirker Larry, Francfort James, Fielding JordonAbstract:In support of the Department of Energy’s Freedomcar and Vehicle Technology Program Office goal to minimize diesel engine idling and reduce the consumption of millions of gallons of diesel fuel consumed during heavy vehicle idling periods, the Idaho National Laboratory (INL) conducted tests to characterize diesel engine wear rates caused by extended periods of idling. INL idled two fleet buses equipped with Detroit Diesel Series 50 engines, each for 1,000 hours. Engine wear metals were characterized from weekly oil analysis samples and destructive filter analyses. Full-flow and the bypass filter cartridges were removed at four stages of the testing and sent to an oil analysis laboratory for destructive analysis to ascertain the metals captured in the filters and to establish wear rate trends. Weekly samples were sent to two independent oil analysis laboratories. Concurrent with the filter analysis, a comprehensive array of other laboratory tests ascertained the condition of the oil, wear particle types, and ferrous particles. Extensive ferrogram testing physically showed the concentration of iron particles and associated debris in the oil. The tests results did not show the dramatic results anticipated but did show wear trends. New West Technologies, LLC, a DOE support company, supplied technical support and data analysis throughout the idle test
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Oil Bypass Filter Technology Evaluation Eleventh Quarterly Report: April -June 2005
'Office of Scientific and Technical Information (OSTI)', 2005Co-Authors: Zirker Larry, Francfort James, Fielding JordanAbstract:This Oil Bypass Filter Technology Evaluation quarterly report (April–June 2005) details the ongoing fleet evaluation of engine oil bypass filter technologies being conducted by the Idaho National Laboratory (INL) for the U.S. Department of Energy’s Freedomcar & Vehicle Technologies Program. Eleven INL four-cycle diesel-engine buses and six INL Chevrolet Tahoes with gasoline engines are equipped with oil bypass filter systems. Eight of the buses and the six Tahoes are equipped with oil bypass filters from the puraDYN Corporation; the remaining three buses are equipped with oil bypass filters from Refined Global Solutions. Both the puraDYN and Refined Global Solutions bypass filters have a heating chamber to remove liquid contaminates from the engine oil. During the April to June 2005 reporting quarter, the eleven diesel engine buses traveled 85,663 miles. As of June 30, 2005, the buses had accumulated 829,871 total test miles. During this quarter, seven regularly scheduled 12,000-mile bus service events were performed. Bus 73449 had its oil accidentally changed on 5/17/05 during servicing. Two buses had mechanical problems which required the oil to be changed: Bus 73446 had an injector failure and Bus 73413 had a broken “dip stick” fitting on the oil pan, both of which introduced contaminants. Buses 73432 and 73433 began the idling phase of the INL Diesel Engine Idling Wear-Rate Evaluation Test. Throughout the 35 months of evaluation, only six oil changes were performed on the INL buses because of degraded oil quality from normal operations. This is a 90% reduction of oil consumption (490 gallons saved) and a concurrent 90% reduction (490 gallons) of waste oil generation. Another six oil changes were performed due to mechanical problems and accidental oil changes. The six Tahoe test vehicles traveled 28,688 miles, and as of June 30, 2005, the Tahoes had accumulated 260,116 total test miles
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U.S. Department of Energy Freedomcar & Vehicle Technologies Program Oil Bypass Filter Technology Evaluation Fifth Quarterly Report October - December 2003
'Office of Scientific and Technical Information (OSTI)', 2004Co-Authors: Zirker Larry, Francfort JamesAbstract:This Oil Bypass Filter Technology Evaluation quarterly report (October-December 2003) details the ongoing fleet evaluation of an oil bypass filter technology by the Idaho National Engineering and Environmental Laboratory (INEEL) for the U.S. Department of Energy's Freedomcar & Vehicle Technologies Program. Eight four-cycle diesel-engine buses used to transport INEEL employees on various routes have been equipped with oil bypass filter systems from the puraDYN Corporation. The bypass filters are reported to have engine oil filtering capability of
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Oil Bypass Filter Technology Evaluation, Eighth Quarterly Report, July - September 2004
'Office of Scientific and Technical Information (OSTI)', 2004Co-Authors: Zirker Larry, Francfort James, Fielding JordanAbstract:This Oil Bypass Filter Technology Evaluation quarterly report (July--September 2004) details the ongoing fleet evaluation of an oil bypass filter technology being conducted by the Idaho National Engineering and Environmental Laboratory (INEEL) for the U.S. Department of Energy’s (DOE) Freedomcar & Vehicle Technologies Program. Eight INEEL four-cycle diesel engine buses used to transport INEEL employees on various routes and six INEEL Chevrolet Tahoes with gasoline engines are equipped with oil bypass filter systems from the puraDYN Corporation. The bypass filters are reported to have engine oil filtering capability of
James Francfort - One of the best experts on this subject based on the ideXlab platform.
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Hybrid and plug-in hybrid electric vehicle performance testing by the US Department of Energy Advanced Vehicle Testing Activity
Journal of Power Sources, 2007Co-Authors: Donald Karner, James FrancfortAbstract:The Advanced Vehicle Testing Activity (AVTA), part of the U.S. Department of Energy's Freedomcar and Vehicle Technologies Program, has conducted testing of advanced technology vehicles since August 1995 in support of the AVTA goal to provide benchmark data for technology modeling, and vehicle development programs. The AVTA has tested full size electric vehicles, urban electric vehicles, neighborhood electric vehicles, and hydrogen internal combustion engine powered vehicles. Currently, the AVTA is conducting baseline performance, battery benchmark and fleet tests of hybrid electric vehicles (HEV) and plug-in hybrid electric vehicles (PHEV). Testing has included all HEVs produced by major automotive manufacturers and spans over 2.5 million test miles. Testing is currently incorporating PHEVs from four different vehicle converters. The results of all testing are posted on the AVTA web page maintained by the Idaho National Laboratory. © 2007.
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hybrid electric vehicle end of life testing on honda insights gen i civics and toyota gen i priuses
2006Co-Authors: James Francfort, Donald Karner, Ryan Harkins, Joseph TardioloAbstract:This technical report details the end-of-life fuel efficiency and battery testing on two model year 2001 Honda Insight hybrid electric vehicles (HEVs), two model year 2003 Honda Civic HEVs, and two model year 2002 Toyota Prius HEVs. The end-of-life testing was conducted after each vehicle has been operated for approximately 160,000 miles. This testing was conducted by the U.S. Department of Energy’s (DOE) Advanced Vehicle Testing Activity (AVTA). The AVTA is part of DOE’s Freedomcar and Vehicle Technologies Program. SAE J1634 fuel efficiency testing was performed on the six HEVs with the air conditioning (AC) on and off. The AC on and off test results are compared to new vehicle AC on and off fuel efficiencies for each HEV model. The six HEVs were all end-of-life tested using new-vehicle coast down coefficients. In addition, one of each HEV model was also subjected to fuel efficiency testing using coast down coefficients obtained when the vehicles completed 160,000 miles of fleet testing. Traction battery pack capacity and power tests were also performed on all six HEVs during the end-of-life testing in accordance with the Freedomcar Battery Test Manual For Power-Assist Hybrid Electric Vehicles procedures. When using the new-vehicle coast down coefficients (Phasemore » I testing), 11 of 12 HEV tests (each HEV was tested once with the AC on and once with the AC off) had increases in fuel efficiencies compared to the new vehicle test results. The end-of-life fuel efficiency tests using the end-of-life coast down coefficients (Phase II testing) show decreases in fuel economies in five of six tests (three with the AC on and three with it off). All six HEVs experienced decreases in battery capacities, with the two Insights having the highest remaining capacities and the two Priuses having the lowest remaining capacities. The AVTA’s end-of-life testing activities discussed in this report were conducted by the Idaho National Laboratory; the AVTA testing partner Electric Transportation Applications, and by Exponent Failure Analysis Associates.« less
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Nissan Hypermini Urban Electric Vehicle Testing
2006Co-Authors: James Francfort, Robert BrayerAbstract:The U.S. Department of Energy’s (DOE’s) Advanced Vehicle Testing Activity (AVTA), which is part of DOE’s Freedomcar and Vehicle Technologies Program, in partnership with the California cities of Vacaville and Palm Springs, collected mileage and maintenance and repairs data for a fleet of eleven Nissan Hypermini urban electric vehicles (UEVs). The eleven Hyperminis were deployed for various periods between January 2001 and June 2005. During the combined total of 439 months of use, the eleven Hyperminis were driven a total of 41,220 miles by staff from both cities. This equates to an average use of about 22 miles per week per vehicle. There were some early problems with the vehicles, including a charging problem and a need to upgrade the electrical system. In addition, six vehicles required drive system repairs. However, the repairs were all made under warranty. The Hyperminis were generally well-liked and provided drivers with the ability to travel any of the local roads. Full charging of the Hypermini’s lithiumion battery pack required up to 4 hours, with about 8–10 miles of range available for each hour of battery charging. With its right-side steering wheel, some accommodation of the drivers’ customary driving methods was required to adapt for different blind spots and vehicle manipulation. For that reason, the drivers received orientation and training before using the vehicle. The Hypermini is instrumented in kilometers rather than in miles, which required an adjustment for the drivers to calculate speed and range. As the drivers gained familiarity with the vehicles, there was increased acceptance and a preference for using it over traditional city vehicles. In all cases, the Hyperminis attracted a great amount of attention and interest from the general public.
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u s department of energy Freedomcar and vehicle technologies program advanced vehicle testing activity federal fleet use of electric vehicles
2003Co-Authors: Mindy Kirpatrick, James FrancfortAbstract:Per Executive Order 13031, “Federal Alternative Fueled Vehicle Leadership,” the U.S. Department of Energy’s (DOE’s) Advanced Vehicle Testing Activity provided $998,300 in incremental funding to support the deployment of 220 electric vehicles in 36 Federal fleets. The 145 electric Ford Ranger pickups and 75 electric Chrysler EPIC (Electric Powered Interurban Commuter) minivans were operated in 14 states and the District of Columbia. The 220 vehicles were driven an estimated average of 700,000 miles annually. The annual estimated use of the 220 electric vehicles contributed to 39,000 fewer gallons of petroleum being used by Federal fleets and the reduction in emissions of 1,450 pounds of smog-forming pollution. Numerous attempts were made to obtain information from all 36 fleets. Information responses were received from 25 fleets (69% response rate), as some Federal fleet personnel that were originally involved with the Incremental Funding Project were transferred, retired, or simply could not be found. In addition, many of the Department of Defense fleets indicated that they were supporting operations in Iraq and unable to provide information for the foreseeable future. It should be noted that the opinions of the 25 fleets is based on operating 179 of the 220 electric vehicles (81% response rate).more » The data from the 25 fleets is summarized in this report. Twenty-two of the 25 fleets reported numerous problems with the vehicles, including mechanical, traction battery, and charging problems. Some of these problems, however, may have resulted from attempting to operate the vehicles beyond their capabilities. The majority of fleets reported that most of the vehicles were driven by numerous drivers each week, with most vehicles used for numerous trips per day. The vehicles were driven on average from 4 to 50 miles per day on a single charge. However, the majority of the fleets reported needing gasoline vehicles for missions beyond the capabilities of the electric vehicles, usually because of range limitations. Twelve fleets reported experiencing at least one charge depletion while driving, whereas nine fleets reported not having this problem. Twenty-four of the 25 fleets responded that the electric vehicles were easy to use and 22 fleets indicated that the payload was adequate. Thirteen fleets reported charging problems; eleven fleets reported no charging problems. Nine fleets reported the vehicles broke down while driving; 14 fleets reported no onroad breakdowns. Some of the breakdowns while driving, however, appear to include normal flat tires and idiot lights coming on. In spite of operation and charging problems, 59% of the fleets responded that they were satisfied, very satisfied, or extremely satisfied with the performance of the electric vehicles. As of September 2003, 74 of the electric vehicles were still being used and 107 had been returned to the manufacturers because the leases had concluded.« less
Patel Bhageerath Reddy - One of the best experts on this subject based on the ideXlab platform.
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advanced high power density interior permanent magnet motor for traction applications
IEEE Transactions on Industry Applications, 2014Co-Authors: Ayman Mohamed Fawzi Elrefaie, James Pellegrino Alexander, Steven Galioto, Patel Bhageerath Reddy, Kumkang Huh, Peter De Bock, Xiochun ShenAbstract:Electric drive systems, which include electric machines and power electronics, are a key enabling technology for advanced vehicle propulsion systems that reduce the petroleum dependence of the ground transportation sector. To have significant effect, electric drive technologies must be economical in terms of cost, weight, and size while meeting performance and reliability expectations. This paper will provide details of the design, analysis, and testing of an advanced interior permanent magnet (PM) machine that was developed to meet the Freedomcar 2020 specifications. The 12-slot/10-pole machine has segmented stator structure equipped with fractional-slot nonoverlapping concentrated windings. The rotor has a novel spoke structure/assembly. Several prototypes with different thermal management schemes have been built and tested. This paper will cover the test results for all these prototypes and highlight the tradeoffs between the various schemes. Due to the high machine frequency (~1.2 kHz at the top speed), detailed analysis of various loss components and ways to reduce them will be presented. In addition, due to the high coolant inlet temperature and the fact that the machine is designed to continuously operate at 180 °C, detailed PM demagnetization analysis will be presented. The key novelty in this paper is the advanced rotor structure and the thermal management schemes.
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advanced high power density interior permanent magnet motor for traction applications
Energy Conversion Congress and Exposition, 2013Co-Authors: Ayman Mohamed Fawzi Elrefaie, James Pellegrino Alexander, Steven Galioto, Patel Bhageerath Reddy, Kumkang Huh, Peter De Bock, Xiochun ShenAbstract:Electric drive systems, which include electric machines and power electronics, are a key enabling technology for advanced vehicle propulsion systems that reduce the petroleum dependence of the ground transportation sector. To have significant effect, electric drive technologies must be economical in terms of cost, weight, and size while meeting performance and reliability expectations. This paper will provide details of the design, analysis and testing of an advanced interior permanent magnet (IPM) machine that was developed to meet the Freedomcar 2020 specifications. The 12 slot/10 pole machine has segmented stator structure equipped with fractional-slot concentrated-windings (FSCW). The rotor has a novel spoke structure. Several prototypes with different thermal management schemes have been built and tested. The paper will cover the test results for all these prototypes and highlight the tradeoffs between the various schemes.
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comparison of interior and surface pm machines equipped with fractional slot concentrated windings for hybrid traction applications
IEEE Transactions on Energy Conversion, 2012Co-Authors: Patel Bhageerath Reddy, Jagadeesh Tangudu, Kumkang Huh, A M Elrefaie, T M JahnsAbstract:Electric drive systems, which include electric machines and power electronics, are a key enabling technology for advanced vehicle propulsion systems that reduce the petroleum dependence of the ground transportation sector. To have significant effect, electric drive technologies must be economical in terms of cost, weight, and size while meeting performance and reliability expectations. This paper will provide details of the design, analysis, and testing of two permanent magnet (PM) machines that were developed to meet the Freedomcar 2020 specifications. The first machine is an interior PM (IPM) machine and the second machine is a surface PM (SPM) machine. Both machines are equipped with fractional-slot concentrated windings (FSCW). The goal of this paper is to provide a quantitative assessment of how achievable this set of specifications is, as well as a comparison with the state of the art. This paper will also quantitatively highlight the tradeoffs between IPM and SPM FSCW machines especially in the context of traction applications.
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comparison of interior and surface pm machines equipped with fractional slot concentrated windings for hybrid traction applications
Energy Conversion Congress and Exposition, 2011Co-Authors: Patel Bhageerath Reddy, Jagadeesh Tangudu, Kumkang Huh, A M Elrefaie, T M JahnsAbstract:Electric drive systems, which include electric machines and power electronics, are a key enabling technology for advanced vehicle propulsion systems that reduce the petroleum dependence of the ground transportation sector. To have significant effect, electric drive technologies must be economical in terms of cost, weight, and size while meeting performance and reliability expectations. This paper will provide details of the design, analysis and testing of two permanent magnet (PM) machines that were developed to meet the Freedomcar 2020 specifications. The first machine is an Interior PM (IPM) machine and the second machine is a surface PM (SPM) machine. Both machines are equipped with fractional-slot concentrated windings (FSCW). The goal of the paper is to provide a quantitative assessment of how achievable this set of specifications is as well as a comparison with the state of the art. The paper will also quantitatively highlight the tradeoffs between IPM and SPM FSCW machines especially in the context of traction applications.
