Page - 87 - in Hybrid Electric Vehicles

whoseshaftsareconnecteddirectly.Thisshaft isalsoassociatedwiththeinputaxleof theclutch. The output axle of the clutch is linked to a permanentmagnetic synchronousmotor (PMSM) whoseshaft isalsoconnected to the finaldrive.Besides thediesel engine,anHESScomposedof lithium-ionbatteries andsupercapacitors aswell as abidirectionalDC/DCconverter isused to provide electric power to thePMSM.Ahigh-voltagepower line is connected to thePMSG, the PMSM, thebatterypack, and theDC/DCconverter. The supercapacitorpackexchanges electric powerwith thehigh-voltagepower linevia thecontrollablebidirectionalDC/DCconverter. Themain technicalparametersof thedesignedcoaxialpower-splithybridpowertrainwithan HESS are listed inTable 1. The internal combustion engine is a 6.5 LYC6J220 diesel engine manufacturedbyYuchaiMachineryCo.,Ltd.Thesupercapacitorpack is composedseriallyof 12unitsofMaxwell48-Vmodule.Thebatterypackconsistsofnineparalleledgroupsandeach Component Parameter Value Unit Engine Type YC6J220diesel engine – Ratedpower 162 kW Ratedspeed 2500 r/min Maximumtorque 760 N·m Peakefficiency 41.9 % Supercapacitors Type Maxwell48-Vmodule – Numberofmodules 12 – Energycapacity 0.651 kWh Ratedvoltage 576 V Voltage range 172–570 V Batteries Type A12326650LiFePO4cell – Numberofmodules 1701 – Energycapacity 14 kWh Ratedvoltage 604 V Voltage range 570–591 V Motor Type Jing-JinElectricPMSM – Ratedpower 150 kW Ratedspeed 3000 r/min Maximumtorque 2100 N m Peakefficiency 93.5 % Generator Type Jing-JinElectricPMSG – Ratedpower 135 kW Ratedspeed 3000 r/min Maximumtorque 850 N m Peakefficiency 94.5 % Table 1. Technical specifications of the coaxial power-split hybrid powertrain. A Hybrid Energy Storage System for a Coaxial Power-Split Hybrid Powertrain http://dx.doi.org/10.5772/67756 87