[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.]
BRUSA offering new high-efficiency motor/gearbox combination for electric commercial vehicles
July 27, 2015
BRUSA Elektronik AG is offering its Planetary Traction Drive DTSP1—a fully integrated electric vehicle drivetrain combining motor and gearbox—with its higher power HSM1-10.18.22 Hybrid Synchronous Motor, offering 220 kW (295 hp) maximum power (145 kW/194 hp continuous) and up to 460 N·m (339 b-ft) peak torque (270 N·m/199 lb-ft continuous). With this configuration, BRUSA is targeting light commercial vehicles, vans or sports cars.
The compact design of the transmission in combination with the powerful motor results in a highly efficient power set. The DTSP1 unit can be used as an axle or four-wheel drivetrain set. By using the differential on the axles, powerful yet weight-optimized drives can be realized. With the adjustment of the axle differential every application can be achieved with the right ratio.
DLR and Wuppertal publish comprehensive global analysis of e-mobility technologies, outlook and lifecycle assessments
July 23, 2015
The German Aerospace Center (Deutsches Zentrum für Luft- und Raumfahrt; DLR) and the Wuppertal Institute for Climate, Environment and Energy (Wuppertal Institut für Klima, Umwelt, Energie GmbH; WI) have published results of their STROMbegleitung (electricity evaluation) comprehensive study to analyze technologies; market outlook; policy support; infrastructure; and life-cycle assessments for electrically-powered transport.
The study, which ran from October 2011 – September 2014, comprehensively charts current progress in technology; identifies trends; analyzes lifecycle assessments for a variety of vehicle concepts; and assess material intensities. At the same time, it places German activities in the field of electromobility within an international context. The research program received a €1.7 million euro grant from the German Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung; BMBF) as part of the STROM support program (key technologies for electromobility).
DOE to award $20M to projects to recover rare earth elements from coal and coal byproducts
June 29, 2015
The US Department of Energy (DOE) has issued a funding opportunity (DE-FOA-0001202) that will award an estimated $20 million to projects quickly to develop bench scale and pilot scale projects for recovering Rare Earth Elements (REE)—a set of seventeen chemical elements in the periodic table and key components of electronics and renewable energy technologies—from coal and coal byproducts.
The DOE has begun investigating the economic feasibility of recovery of REEs from domestic United States coal and coal byproducts. n FY14, DOE’s National Energy Technology Laboratory (NETL) conducted a preliminary, short-term, baseline field evaluation of coal and coal by-products as potential domestic resources of REEs. NETL has characterized a number of REE-bearing samples of coal and coal related materials, and posted the associated results and reports here.
Toho Tenax’s prepreg helps to cut 1.1MW Tajima Rimac electric racer’s weight
June 22, 2015
Teijin Limited announced that carbon fiber sheet pre-impregnated with matrix resin, or prepreg, made by Toho Tenax Co., Ltd., the core company of the Teijin Group’s carbon fibers and composites business, is used in the lightweight body of a new 1.1 MW electric racecar operated by Team APEV with Monster Sport. The Tajima Rimac E-Runner Concept_One—driven by Tajima CEO Nobuhiro “Monster” Tajima—will race in the Electric Modified Division in the Pikes Peak International Hill Climb from June 22 to 28.
The racer, developed by Rimac Automobili in collaboration with Monster Sport and Team APEV, is based on an aluminum space frame covered with the carbon fiber composite body panels. A 57 kWh Rimac battery pack powers four Rimac permanent magnet synchronous motors, delivering combined maximum output of 1,100 kW (1,475 hp) and 1,500 N·m (1,106 lb-ft) of torque.
A closer look at Audi’s new R8 e-tron EV and battery
June 12, 2015
The model line-up of the second generation of Audi’s high-performance R8 sports car, unveiled at the Geneva Motor Show earlier this year, includes the new R8 e-tron battery-electric vehicle. (Earlier post.) The new R8 e-tron delivers 340 kW (456 hp) of power; acceleration from 0 to 100 km/h (62.1 mph) in 3.9 seconds; and a driving range of up to 450 km (279.6 mi). Range for the first generation R8 e-tron was was 215 km (133.6 mi).
Available for order this year upon customer request, the new R8 e-tron uses a newly developed high energy density Li-ion technology optimized for a purely electric vehicle drive. Li-ion cell energy density was increased from 84 to 152 Wh/kg; in comparison to the first technology platform, the battery capacity has grown from 48.6 kWh to 90.2 kWh—without changing the package.
First 18-meter electric bus in China powered by TM4 SUMO HD powertrain with external rotor motor technology
May 07, 2015
China’s first 18-meter battery electric bus has been put into service in Beijing. The Foton AUV 18-meter Harmony City BJ6180 is powered by a TM4 SUMO HD electric powertrain with a maximum torque of 3,500 N·m (2,581 lb-ft), 1600 N·m (1,180 lb-ft) continuous.
The SUMO HD is designed to interface with standard rear differentials without the need for an intermediate gearbox. Its direct drive / gearless approach makes it a good match for high-duty platform and commercial vehicle applications. The system features TM4’s external rotor motor technology (in which the rotor rotates on the outside of the stator). The external rotor motor technology delivers higher power density, high torque density, and increased long-term reliability than a similar motor with an internal rotor, according to TM4.
Ames Lab team replaces Dysprosium in permanent magnets with Cerium for lower-cost, high performance solution
April 24, 2015
Researchers led by a team at the US Department of Energy’s Ames Laboratory have created a new lower-cost magnetic alloy that is an alternative to conventional NdFeB-based permanent magnets. The new alloy—a potential replacement for high-performance permanent magnets found in EV motors and wind turbines—replaces dysprosium (Dy), one of the scarcest and costliest rare earth elements.
The new alloy of neodymium, iron and boron co-doped with cerium and cobalt is a less expensive material with properties that are competitive with traditional sintered magnets containing dysprosium. As reported in a paper in the journal Advanced Materials, the Ce, Co co-doped alloys have excellent high-temperature magnetic properties with an intrinsic coercivity being the highest known for T ≥ 453 K (180 ˚C).
GM provides technical details of the Gen 2 Voltec propulsion system used in the 2016 Volt
April 23, 2015
The second-generation “Voltec” extended range electric powertrain applied in the MY2016 Chevy Volt (earlier post) marks a significant evolution in the electric drive technology platform from its first-generation origins. After proving a initial look at the design and capability of the different components (earlier post) late last year, GM is now providing deeper technical insight into the second-generation platform.
At the SAE 2015 World Congress in Detroit this week, GM engineers are presenting four papers on the technology of the Gen 2 Voltec propulsion system: an overview of the system and the realized improvements in efficiency and performance; a paper on the significantly re-engineered traction power inverter module (TPIM); a paper on the design and performance of the new electric motors used in the propulsion system; and a paper on the selection and design of the optimized gasoline-fueled 1.5-liter range extender engine.
New ABB Azipod D for electric marine propulsion requires 25% less installed power, boosts flexibility
March 25, 2015
|Azipod D. Click to enlarge.|
ABB has introduced a new offering, Azipod D, to its line of Azipod marine electric propulsion systems. This new product will allow a wider range of vessel types to benefit from the proven reliability and flexibility that have made Azipod the leading propulsion system across numerous ship types.
Azipod Propulsion is a gearless steerable propulsion system in which the electric drive motor is in a submerged pod outside the ship hull. A ship with Azipod Propulsion does not need rudders, long shaftlines or stern transversal thrusters. This new Azipod D provides designers and ship builders with increased design flexibility in order to accommodate a wide range of hull shapes and propeller sizes, as well as simplicity of installation. The Azipod D requires up to 25% less installed power. This is partly due to the fact that the new hybrid (air and water) cooling helps reduce the thruster’s weight and directs more power toward propulsion of the ship, not cooling requirements. The performance of the electric motor is increased by up to 45%.
DOE to award up to $20M to advance high-speed industrial motors and drives
March 20, 2015
The US Department of Energy (DOE) will award up to $20 million to spur the development of high-speed industrial motors and drives, using high power-density designs and integrated power electronics to increase efficiency. Individual awards may vary between $3 million and $5 million, not including the recipient cost share.
The Energy Department plans to select four to six projects, through the Next Generation Electric Machines: Megawatt Class Motors funding opportunity (DE‐FOA‐0001208), that demonstrate the benefits of using wide bandgap (WBG) variable-speed drives. These projects are expected to target a 30% reduction in system losses and a 50% reduction in size for megawatt-scale motor and drive systems used in the chemical and petroleum refining industries; natural gas infrastructure; and general industry compressor applications such as HVAC systems, refrigeration, and wastewater pumps.
Renault boosts ZOE EV’s range by almost 15% to 149 miles with new motor unit
March 04, 2015
|The new R240 motor unit with integrated PEC. Click to enlarge.|
Renault has extended the range of its battery-electric ZOE to 149 miles (240 kilometers)—a boost of 19 miles (31 km), or 14.6%—in the New European Driving Cycle (NEDC) by using a new lighter and more compact R240 electric motor and an optimized electronic management system. (Earlier post.)
The R240 is a synchronous electric motor with rotor coil, with a power output of 65 kW and torque of 220 N·m (162 lb-ft). It also features a built-in Chameleon charger (earlier post) which allows faster charging at home (3 kW and 11 kW). The R240 is an all-Renault motor, designed by Renault engineers at the Technocentre R&D facility outside Paris and at the Cléon plant where the motor is made—close to Flins, where the ZOE is produced.
TM4 receiving $3.7M to develop low-cost wheel motors
February 28, 2015
TM4, a wholly owned subsidiary of Hydro-Québec, is receiving $3.7 million in funding from Sustainable Development Technology Canada’s (SDTC) SD Tech Fund, through the ecoENERGY Innovation Initiative, to develop low-cost wheel motors for electric and hybrid vehicles.
The objective of this project is to design an in-wheel motor electric drive system with one of the highest power densities in the world, and at the lowest possible cost. This system will consist of one or more power converters and electric machines, to be assembled and bench tested, and then tested on the road in an electric vehicle.
Ricardo develops prototype next-generation 85 kW switched reluctance EV motor; no rare earth elements
February 23, 2015
|The Ricardo RapidSR switched reluctance drive motor avoids the use of rare earth elements. Click to enlarge.|
Ricardo has developed a new prototype 85 kW synchronous reluctance motor designed primarily for electric vehicle traction applications. The motor avoids the use of expensive rare earth elements, while delivering strong performance at a significantly reduced cost.
The new EV motor was designed and built in prototype form by Ricardo as part of a collaborative research and development project, RapidSR (Rapid Design and Development of a Switched Reluctance Traction Motor). (Earlier post.) Using a conventional distributed stator winding, the Ricardo synchronous reluctance electric machine is an innovative design that makes use of low-cost materials, simple manufacturing processes and uncomplicated construction.
Porsche names GKN Driveline “Technology Partner” for eAxle system in 918 Spyder plug-in hybrid supercar
February 12, 2015
Porsche has awarded GKN Driveline “Technology Partner” status for its development of the high-performance eAxle for the 918 Spyder, an advanced plug-in hybrid supercar. (Earlier post.) GKN Driveline’s eAxle module—used for the 918 Spyder’s front axle—supports full-electric mode, all-wheel drive and provides a boost function.
The eAxle that supplements the 918 Spyder’s hybridized 4.6-liter V8 is an evolution of the company’s innovative eAxle drive. (Earlier post.) The module has maximum power of 95 kW and can deliver up to 1500 N·m (1,106 lb-ft) of torque to the front wheels via a fixed gear ratio. A specially developed compact differential engages the torque seamlessly, giving the 918 Spyder optimum power distribution at all times. The differential also disengages the module to minimize drag losses and maximize efficiency. At speeds above 265 km/h (164 mph), a clutch isolates the electric motor to prevent it from over-spinning.
ESKAM finishing electric drive axle module for commercial vehicles, new production technologies; vehicle testing this year
February 02, 2015
|Electric drive axle module with two motors and integrated power electronics. Groschopp AG. Click to enlarge.|
The ESKAM (Electric Scalable Axle Module, Elektrische SKalierbare AchsantriebsModule) consortium in Germany, sponsored by the German Federal Ministry of Education and Research (BMBF), is completing the development of an optimized electric drive axle module for commercial vehicles, consisting of two motors, transmissions and power electronics. All components fit neatly and compactly into a shared housing, which is fitted in the vehicle using a special frame construction also developed by the project engineers.
The individual modules developed by the various partners are complete, as are new manufacturing techniques developed by the partners. The consortium is now putting the individual parts together to make a demonstrator. After that, they want to fit the axle module into a real vehicle for testing by the end of 2015.
Study finds vertical force of in-wheel switched reluctance motors deteriorates vehicle stability and comfort
January 27, 2015
In a study investigating switched reluctance motors (SRMs) for in-wheel motor applications, researchers at Chongqing University in China have found that the vertical component of the residual unbalanced radial force of the motor deteriorates the lateral and anti-rollover stabilities of the vehicle in addition to having a considerable impact on vehicle comfort. (The unbalanced radial force is the radial force difference between a pair of opposite stator poles.)
In their paper, published in the Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, they suggest that a control method addressing these issues will be needed if SRMs are to see use in in-wheel applications. In an earlier paper, members of the team had proposed the use of an FxLMS (filtered-X least mean square) controller based on active suspension system to generate controllable force to suppress the vibration caused by SRM vertical force. In that paper, they found that utilizing active suspensions could reduce the effect of SRM vertical force on suspension performance.
UQM Technologies granted patent on permanent magnet electric motor design using non-rare earth magnets
January 20, 2015
UQM Technologies Inc. has been granted a US patent (8,928,198, “Brushless PM machine construction enabling low coercivity magnets”) for an electric and hybrid electric vehicle motor design using non-rare earth magnets. The patent covers the unique magnet geometry and the method of manufacturing the motor.
The majority of electric and hybrid electric vehicles produced today use permanent magnet (PM) motors with rare-earth magnet materials because of the high coercivity of the rare earth materials. Coercivity is a measure of the reverse field needed to drive magnetization to zero after being saturated—i.e., it is a measure of the resistance to demagnetization. The new UQM design enables the use of low coercivity magnets, such as Aluminum Nickel Cobalt (AlNiCo) or Iron Cobalt Tungsten (FeCoW), in PM machines.
Renault previews new production-bound EV motor and dual-fuel gasoline/LPG engine
December 12, 2014
|Renault’s new, more compact electric motor with integrated Power Electronic Controller. Click to enlarge.|
Renault has previewed a new electric vehicle motor, designed by its engineers and manufactured at its Cléon plant in France, as well as a new dual-fuel gasoline/LPG combustion engine. Both are slated to enter production in 2015. Rémi Bastien, Renault’s Director of Innovation Engineering, noted that “The future of mobility calls for the same command of electric motor technology as it does of internal combustion engines. We are consequently active on every front, from internal combustion engines to electric motors and alternative energies.”
New Renault electric motor. The synchronous electric motor with wound rotor develops 65 kW and peak torque of 220 N·m (162 lb-ft), and features an integrated Chameleon charger (earlier post). Integration, miniaturization and simplification were the three objectives that guided the design of this motor.
GKN develops two-speed eAxle; in production on BMW i8
November 10, 2014
GKN has developed the first two-speed eAxle; the technology has entered production on the BMW i8 plug-in hybrid sports car, (earlier post) in which it provides power to the front wheels from a 96 kW, 250 N·m (184 lb-ft) electric motor. (A 170 kW/231 hp three-cylinder combustion engine in the BMW i8 drives the rear wheels.)
Production electric and axle-split hybrid vehicles have used single-speed transmissions; however, GKN said, using a fixed ratio limits electric drives in terms of either acceleration or top speed as they must disconnect at certain speeds to prevent the motor overspinning. GKN said its two-speed eAxle is the first in series production to enable the electric drive to boost the vehicle’s performance across its entire speed range.
Honda beginning sales of Legend with 3-motor Sport Hybrid SH-AWD system in January; V6 with cylinder deactivation
Honda Motor Co., Ltd. will begin sales of the all-new Legend flagship sedan (its cousin is already on sale in the US as the Acura RLX Sport Hybrid SH-AWD) at dealerships across Japan on 22 January 2015. The fifth-generation Legend features the 3-motor Sport Hybrid Super Handling All-Wheel Drive (SH-AWD) system also offered in the RLX Sport Hybrid SH-AWD (earlier post).
Positioned at the front of the vehicle is a newly developed V6 3.5L direct injection i-VTEC engine and a 7-speed dual-clutch transmission (DCT) with an integrated 35 kW electric motor. The rear-mounted TMU (Twin Motor Unit) contains two 27-kilowatt motors that dynamically distribute electric-motor torque to the rear wheels. Both the front and rear motors capture kinetic energy during vehicle deceleration and braking and convert it to electricity to supply the Intelligent Power Unit’s 72-cell, 1.3-kWh lithium-ion battery pack, located behind the rear seatback. Teaming up with a high-output lithium-ion battery, the control unit coordinates the operation of the engine and three motors.
First look at all-new Voltec propulsion system for 2G Volt; “the only thing in common is a shipping cap”
October 29, 2014
The second-generation Volt, which makes its world debut in about 10 weeks at the North American International Auto Show in Detroit, features a clean-sheet, all-new Voltec propulsion system—new battery, new electric drive unit, new power electronics and new range-extending engine. At an introductory media briefing on the new powertrain held at the Warren Transmission Plant in Michigan, where the new drive unit will be built, Larry Nitz, GM Executive Director, Transmission and Electrification, noted that the only common part between the gen 1 and gen 2 drive units was a little yellow plastic intra-plant shipping cap for the manual selector.
The battery cells, with a tweaked NMC/LMO chemistry from LG, increase storage capacity by 20% volumetrically when compared to the original cell. The drive unit features a large number of changes: new roles for the two motors, two clutches instead of three, and a smaller power electronics unit integrated into the housing among them. (No more big orange high-voltage cables underneath the hood.) The new direct-injected 1.5 liter engine with cooled EGR features a high compression ratio and is optimized to function in its range extender role.
GM Warren Transmission Plant to build electric drive unit for second-gen Volt; part of $300M investment in Michigan through end of year
October 28, 2014
Later today at the Detroit Economic Club, General Motors CEO Mary Barra will confirm that its Warren Transmission Plant will build the new electric drive unit—the GM Voltec 4ET50 Multi-Mode EDU—for the upcoming second-generation Chevrolet Volt. As a result, most major Volt powertrain components—from the battery cells to the new 1.5-liter range-extending engine—will be made in Michigan, establishing the state as the company’s global engineering center of excellence for vehicle electrification. The new Volt will debut at the North American International Auto Show in Detroit in January 2015.
The drive unit for the first-generation Volt consists of two motors—a 111 kW main traction and 63 kW (at 4800 rpm) generator motor (55 kW generator output)—as well as three clutches and a planetary gear set tucked in the end of the traction motor that improve overall efficiency by reducing the combined rotational speed of the electric motors as needed. (Earlier post.) GM will subsequently be providing details of the second-generation drive unit.
NIMS team develops new magnetic compound with lower neodymium content
October 20, 2014
A research group led by Dr. Kazuhiro Hono at Japan’s National Institute for Materials Science (NIMS) has synthesized a new magnetic compound which requires a lower amount of rare earth element than the currently used neodymium iron boron compound.
The ratio of neodymium, iron and nitrogen in the new compound (NdFe12N is 1:12:1). Its neodymium concentration is 17% of the entire mass compared to 27% for the neodymium iron boron compound known as Nd2Fe14B, the main component used in the strongest permanent magnets. Furthermore, the intrinsic hard magnetic properties of the new material were found to be superior to those of Nd2Fe14B.
Siemens integrates EV motor and inverter in single housing; common cooling and SKiN
October 17, 2014
|Siemens has developed a solution for integrating an electric car's motor and inverter in a single housing. Click to enlarge.|
Siemens has developed a solution for integrating an electric car’s motor and inverter in a single housing. The motor and the inverter, part of the power electronics which converts the battery’s direct current into alternating current for the motor, have up to now been two separate components. The new integrated drive unit saves space, reduces weight, and cuts costs.
The solution’s key feature is the use of a common cooling system for both components. This ensures that the inverter’s power electronics don’t get too hot despite their proximity to the electric motor, and so prevents any reduction in output or service life.
New “2-in-1” EV unit integrates traction motor and A/C compressor for increased range in hot climates
October 01, 2014
Engineers from Nanyang Technological University (NTU) and the German Aerospace Centre (DLR) have designed a “2-in-1” electric motor unit which can increase the range of electric vehicles in hot climates. This innovative electric machine integrates the A/C compressor, the compressor drive motor and the traction motor into a single housing physically clutching with the compressor during braking events.
The approach unifies the EV traction and compressor drives into a single housing which drive together during braking events. Based on simulations and analysis, the team expects the system to reduce battery consumption by at least 3% compared to existing mechanisms while improving the regenerative energy capturing capacity of the system by 8%. Overall, the novel design could increase the range of electric vehicles by an additional 15 to 20% with other modifications, the researchers suggested.
DOE awards $17M for vehicle technologies; batteries, PEEM, engines, materials, fuel
August 21, 2014
The US Department of Energy (DOE) is awarding $17.6 million in 14 cooperative agreements with small businesses and institutions of higher education to develop and to deploy efficient and environmentally friendly highway transportation technologies that will help reduce petroleum use in the United States. The awards made under an Incubator Funding Opportunity Announcement (DE-FOA-0000988) issued in January. (Earlier post.)
The newly selected projects are in five areas: energy storage; power electronics and electric motors (PEEM); advanced combustion engines; materials technologies, and fuels and lubricant technologies. Awardees are: