48V Power Assist Recuperation System (PARS) with a permanent magnet motor, inverter and DC-DC converter

The present study proposed a novel Power Assist Recuperation System consisted of motor, inverter, DC-DC converter and 48V Li ion battery for fuel saving of conventional Internal Combustion Engine and hybrid vehicles. As a total solution of the next-generation 48V PARS, key components such as Interior Permanent Magnet Synchronous Motor, MOSFET power switching inverter and bi-directional DC-DC converter with cost competitiveness from in-house power IC´s and power modules have been optimized based on a 48V Li ion battery. A deep flux weakening control has been evaluated for the IPMSM´s high speed operation. The specific value of how much the proposed 48V PARS can reduce CO₂ emission and fuel consumption was estimated by so-called Autonomie software using both efficiency maps of motoring and generating modes. It is noticed that the present 48V PARS gives a considerably enhanced performance in reduction of fuel consumption by as high as 17% for a commercial 1.8L engine.