Design and investigation of segmented rotor dual stator HE FSM for aircraft applications

The aircrafts in the modern age are well equipped by electrical devices are known as all electric aircraft (AEA). One of the main objectives of the aerospace industry for the future is AEA to save the fossil fuels, environment and cost. For aerospace propulsion system, electrical machines provide high torque density are dominant for the viability of direct-drive electrical propulsion of aircraft applications. Besides low-weight and high torque capability, a candidate solution should also be inherently fault tolerant for it to be used in aircraft applications. For these reasons a new type of machine has been introduced in last decade know as flux switching machine (FSM). In which all excitation sources are located on stator side with robust rotor structure. FSMs are categorized in to three types such as permanent magnet PM FSM, field excitation FE FSM and hybrid excitation HE FSM. PMFSM and FEFSM uses PM and FE coil for their excitation sources respectively, whereas both PM and FE coil are used in HEFSM for excitation. Since these machines have shown high torque-to-weight ratios and high efficiency during research in the last decade. Despite this, the task of designing a machine appropriate for this application goes beyond the electromagnetic design and into the area of mechanical design much deeper than for traditional designs. Therefore in this paper a new structure of dual stator (DS) HEFSM with segmental rotor is proposed and analyzed. The proposed design of DS HEFSM has simple structure with only six FECs and six PMs. New structure is analyzed using commercial 2D FEA package, JMAG-designer ver. 14.0, released by JSOL Corporation. This paper presents the coil test analysis of proposed HEFSM to confirm the working principle besides, performance analysis is presented at no load and load conditions.