Ricardo to present high efficiency electric motor and compact DCT at Berlin CTI show
At the CTI Symposium to be hosted in Berlin next week, Ricardo will share details aspects of the design of a novel e-motor offering up to a 50 percent increase in power density compared with current production electric machines – as well as a new transverse DCT concept offering a highly compact package and ease of integration with an e-motor for effective hybridization
In July 2018 Ricardo unveiled its new Ricardo 48V e-motor and accompanying inverter, which are designed to incorporate the latest thinking in high-performance, low-cost electrification with the aim of offering performance of 48V hybrids as a more attractive and affordable solution in comparison with today’s higher-voltage hybrids. The design and testing of this new 25kW, 48V e-motor and inverter was carried out as a part of the company’s contribution to the European COmpetitiveness in Commercial Hybrid and AutoMotive PowertrainS (ECOCHAMPS) project.
In a paper to be presented at the CTI Symposium, Berlin, on 4 December, details of the development of the 6-phase, frameless, permanent magnet motor and its oil-cooled inverter with low thermal resistance, will be outlined. A particular focus of the paper is on the thermal management work, in particular reducing the thermal resistance – and hence improving the efficiency – of the inverter’s metal oxide semiconductor field effect transistor (MOSFET). The solution developed is based on the use of direct oil cooling of the heat sink using the same ATF as used to cool the e-motor. With its high performance and compact configuration, the e-motor and inverter combination is ideal for 48V hybrid applications providing a more cost-effective trade-off than today’s higher voltage products.
Compact transverse DCT concept
At the accompanying exhibition of the CTI Symposium, a key attraction of the Ricardo displays will be a new transverse DCT concept that has been developed based on the company’s experience in the design of supercar transmissions. The unit’s dual clutch remains in line with the engine, while the two outputs drive high-speed bevel gearsets respectively delivering torque to the odd and even plus reverse gear sets. As configured, the Ricardo hybrid transverse DCT concept is approximately 37 percent shorter in length than its target/reference products, as well as offering better weight distribution, reduced vehicle polar moment of inertia, and ease of integration of an e-motor in a hybrid powertrain solution.
“Ricardo is once again pleased to participate in the CTI Symposium in Berlin, one of the most prestigious events on the European transmission and driveline technology calendar,” commented Martin Tolliday, director, passenger car & motorcycle market sector, Ricardo. “In addition to the high-efficiency, low-cost 48V hybrid e-motor and inverter technology and our new compact, performance DCT concept, we will be showing a wide range of new powertrain and driveline technologies at the exhibition and look forward to what will be a very interesting event.”
Ricardo will be exhibiting at booth J06 at the CTI Symposium, Berlin, 4-5 December 2018. The Ricardo paper ‘Development of High-Power, 6-phase, Frameless 48V IPM Motor and an Oil-Cooled Inverter with Low Thermal Resistance’ will be presented at 12.30, 4 December, Session E.