[Due to the increasing size of the archives, each topic page now contains only the prior 365 days of content. Access to older stories is now solely through the Monthly Archive pages or the site search function.]
Wolfspeed delivers industry’s first 1000V SiC MOSFET for efficient EV fast chargers
October 06, 2016
Wolfspeed, a Cree Company and a leader in silicon carbide (SiC) power products, has introduced a 1000V MOSFET (metal–oxide–semiconductor field-effect transistor) that enables a reduction in overall system cost, while improving system efficiency and decreasing system size. The new MOSFET, specially optimized for fast charging and industrial power supplies, enables a 30% reduction in component count while achieving more than 3x increase in power density and a 33% increase in output power.
Designers can reduce component count by moving from silicon-based, three-level topologies to simpler two-level topologies made possible by the 1000 Vds rating of the SiC MOSFET. The increase in output power in a reduced footprint is realized by the ultra-low output capacitance—as low as 60pF—which significantly lowers switching losses.
NC State team develops new SiC inverter; 12.1 kW/L & greater efficiency in a smaller, lighter package
September 15, 2016
Researchers at the Future Renewable Electric Energy Distribution and Management (FREEDM) Systems Center at North Carolina State University have developed an inverter for hybrid and electric vehicles using off-the-shelf components made of the wide-bandgap semiconductor material silicon carbide (SiC).
The new SiC-based inverter has a power density of 12.1 kW/L—close to the US Department of Energy’s target of 13.4 kW/L by 2020. By way of comparison, a 2010 electric vehicle could achieve only 4.1 kW/L. Further, says Iqbal Husain, ABB Distinguished Professor of Electrical and Computer Engineering at NC State and director of the FREEDM Center, the silicon carbide prototype inverter can transfer 99% of energy to the motor—about two percent higher than the best silicon-based inverters under normal conditions.
Utah, Minnesota team discover highly conductive oxide-based materials; STO/NTO offer “different road to power electronics”
July 27, 2016
Engineers from the University of Utah and the University of Minnesota have discovered that interfacing two particular oxide-based materials—strontium titanate (STO) and neodymium titanate (NTO)—makes them highly conductive, a boon for future power electronics that could result in more power-efficient laptops, electric cars and home appliances that also don’t need cumbersome power supplies. Their findings were published in an open access paper in the journal, APL Materials, from the American Institute of Physics.
The team led by University of Utah electrical and computer engineering assistant professor Berardi Sensale-Rodriguez and University of Minnesota chemical engineering and materials science assistant professor Bharat Jalan revealed that when the two oxide compounds interact with each other, the bonds between the atoms are arranged in a way that produces many free electrons—the particles that can carry electrical current. STO and NTO are by themselves known as insulators—i.e., not conductive at all. When they interface, however, the amount of electrons produced is a hundred times larger than what is possible in semiconductors.
Infineon buys Wolfspeed Power for $850M cash; power semiconductors for electromobility
July 15, 2016
Infineon Technologies AG has entered into a definitive agreement to acquire the Wolfspeed Power and RF division of Cree. The deal also includes the related SiC wafer substrate business for power and RF power. The purchase price for this planned all-cash transaction is US$850 million (~€740 million). Infineon says that the purchase will give it the broadest offering in compound semiconductors (semiconductors made from two or more elements) and will further strengthen Infineon as a leading supplier of power and RF power solutions in high-growth markets such as electro-mobility, renewables and next-generation cellular infrastructure relevant for the Internet of Things (IoT).
Wolfspeed is based in Research Triangle Park, North Carolina, USA, and has been a part of Cree for almost three decades. Wolfspeed is a premier provider of SiC-based power and GaN-on-SiC-based RF power solutions. This also includes the related core competencies in wafer substrate manufacturing for SiC, as well as for SiC with a monocrystalline GaN layer for RF power applications. With these competencies, more than 550 highly skilled employees and a strong IP portfolio of approximately 2,000 patents and patent applications, this deal complements Infineon’s previous acquisition of International Rectifier in early 2015. (Earlier post.) Wolfspeed’s SiC-based product portfolio ideally adds to Infineon’s offering.
University of Nottingham leading 3-year, £830K project on automotive power electronics
July 14, 2016
The EPSRC Challenge Network in Automotive Power Electronics will bring together the academic and industrial communities to identify and to address the long-term challenges in the design, manufacture, deployment and operational management of automotive electrical-power conversion and conditioning systems.
Infineon presents latest power modules for hybrid and electric vehicles; compact and higher power density
May 11, 2016
Infineon Technologies AG is presenting its latest power module family for hybrid and electric vehicles—HybridPACK Double Sided Cooling (DSC)—at the PCIM 2016 tradeshow. The new power modules have extremely small dimensions of only 42 mm x 42.4 mm x 4.77 mm. They target HEV applications such as main inverters and generators with a typical power range of 40 to 50 kW. In order to support higher power, they can be used in parallel configurations.
With only 15 nH, the stray inductance is very low while blocking voltage was increased to 700 V. Both factors support the development of inverter systems with reduced switching losses of about 25% and very high efficiency.
Siemens and Valeo to form joint venture in high-voltage electric powertrains
April 18, 2016
Siemens and Valeo have signed an agreement to form a joint venture in high voltage powertrains for the entire range of electric vehicles including hybrids, plug-in hybrids and full electric vehicles. Building upon the complementary scope and portfolio of the partners, the joint venture will provide substantial synergies in manufacturing and sourcing and create a base for sustained growth and profitability.
Siemens said that the electric vehicle components market is expected to grow with a compound annual growth rate of more than 20% until 2020. According to the agreement, Siemens and Valeo will each hold a 50% stake in the joint venture, have joint control and account for their respective stake using the equity method.
Pi Innovo and GaN Systems collaborate to offer electronics design services for auxiliary systems for multi-voltage, hybrid and electric vehicles
March 21, 2016
Controls engineering firm Pi Innovo and gallium nitride (GaN) semiconductor manufacturer GaN Systems are collaborating to offer automakers a pathway to the efficient and effective electrification of auxiliary systems for multi-voltage conventional, hybrid-electric, and pure electric vehicles.
GaN devices offer a number of benefits compared to silicon-based devices, including high dielectric strength; high current density; high switching speeds; low on-resistance; and the ability to withstand higher operating temperature. Compared to silicon, gallium nitride has ten times higher electrical breakdown characteristics, three times the band gap, and exceptional carrier mobility.
DOE selects 33 clean energy businesses for nearly $6.7M in support under Small Business Vouchers pilot
March 11, 2016
The US Department of Energy (DOE) selected 33 small businesses to work directly with DOE national labs to accelerate the commercialization of new clean energy technologies.
The department’s Office of Energy Efficiency and Renewable Energy is investing nearly $6.7 million under Round 1 of the new Small Business Vouchers (SBV) pilot. For Round 1, the small businesses and laboratories will collaborate on advancing a number of clean energy technologies, including water, wind, bioenergy, solar, buildings, vehicles, fuel cells, geothermal technologies, and advanced manufacturing. The selected small businesses will work with scientists at nine department laboratories: Oak Ridge National Laboratory (ORNL); National Renewable Energy Laboratory (NREL); Lawrence Berkeley National Laboratory (LBNL); Sandia National Laboratories (SNL); Pacific Northwest National Laboratory (PNNL); Idaho National Laboratory (INL); Los Alamos National Laboratory (LANL); Argonne National Laboratory (ANL); and Lawrence Livermore National Laboratory (LLNL).
DOE to issue $25M funding opportunity for next generation of electric machines; NGEM II
February 19, 2016
The US Department of Energy’s (DOE) Office of Energy Efficiency and Renewable Energy (EERE) intends to issue, on behalf of the Advanced Manufacturing Office (AMO), a $25-million Funding Opportunity Announcement (DE-FOA-0001467) entitled “Next Generation of Electric Machines: Enabling Technologies.” EERE plans to issue the FOA around March 2016.
Through this FOA, AMO seeks to create future high impact manufacturing opportunities through the Next Generation of Electric Machines (NGEM) vision, which is a targeted development of high power density, high revolutions per minute motors and integrated power electronics. (Earlier post.) Specifically, this FOA targets the development of key technologies that will enable further efficiency enhancements and weight reductions in a cost effective way while addressing the limitations of traditionally used conductive metals and electrical steels.
TM4, PSA Peugeot Citroën, Exagon Motors and the Gouvernement du Québec partner on new electric drivetrain
January 21, 2016
TM4, PSA Peugeot Citroën, Exagon Motors, Hydro-Québec and the Gouvernement du Québec are collaborating to develop a new electric drivetrain for light-duty vehicles. TM4 will act as the developer of the electric powertrain in the pre-development phase of the project.
The government’s contribution will be made up of a CAD 10-million equity interest and a CAD 6-million loan. HydroQuébec will also be contributing CAD 4 million to the project, in addition to the services offered by its subsidiary TM4 to help with the development of an electric motor.
DOE releases SBIR/STTR FY16 Phase 1 Release 2 topics; hydrogen, electric vehicles, more efficient combustion engines; biogas-to-fuels
November 16, 2015
The US Department of Energy has announced the 2016 Small Business Innovation Research and Small Business Technology Transfer (SBIR/STTR) Phase I Release 2 Topics, covering eight DOE research program organizations.
Among the many topics listed are magnetocaloric materials development for hydrogen delivery; two hydrogen technology transfer opportunities (TTO); EV traction batteries and power electronics; new combustion engine technologies; and the co-utilization of CO2 and methane in biogas to produce higher hydrocarbon fuels. DOE plans to issue the full Funding Opportunity Announcement (FOA) on 30 November 2015.
UQM Technologies in 10-year electric propulsion systems agreement with ITL in China; 3K units ordered; potential for >$400M in revenue
October 27, 2015
UQM Technologies Inc. has signed a 10-year supply agreement with ITL Efficiency Corporation in China, a subsidiary of Eastlake New Energy, to provide electric propulsion systems for three market segments: 6-8 meter shuttle buses; light- to medium-duty delivery trucks; and 10-12 meter transit buses. Over the term of the Agreement, revenues could exceed $400 million based on projected volume shipments.
Production is expected to begin in early 2017 following development, test and certification programs during 2016; timing will be dependent on the successful completion of the test and certification processes, followed by orders under the Agreement. UQM has received the first purchase order under the Agreement for the initial 3,000 units which are expected to ship in 2017.
GM and LG expand their relationship on Bolt EV; 12 components, including PEEM
October 20, 2015
GM and LG announced an expanded and deepened relationship around the coming Bolt battery-electric vehicle (earlier post), with LG providing not only the battery pack and battery heater, but also the critical PEEM (power electronics and electric machine) components; the HVAC electronic climate control system compressor; telematics hardware for OnStar; and the instrument cluster and infotainment system displays.
In a media briefing, Mark Reuss, GM executive vice president – global product development, purchasing and supply chain, observed that the expanded strategic partnership with LG marked a significant new approach to the adversarial automaker-supplier relationships of the past. Further, he noted, such a new type of relationship would be essential for electric vehicles. “The Bolt EV will be the result of an entirely different PEM/supplier relationship.”
Toyota details powertrain advances in Gen4 Prius; available E-Four system for all-wheel drive (not for US)
October 13, 2015
Toyota made significant improvements in its new generation full hybrid powertrain applied in the fourth generation Prius (earlier post), reducing losses, redesigning and relocating key components and reducing weight. Extensive changes to the transaxle, engine and combined hybrid system, generate an expected improvement in EPA estimated MPG on core models of up to 10% (i.e., up to ~55 mpg US combined), with an Eco model that will achieve an even greater improvement.
In a presentation outlining the changes to the new Prius system, Shunsuke Fushiki from Toyota’s Hybrid Engineering Management Division noted that the new engine contribues about 28% of the improvement in fuel efficiency; hybrid system management contributes about 26%; the new electric motor, 16%; new transaxle and PCU, 13% each; and new battery packs, 4%.