Design and analysis of double stator HE-FSM for aircraft applications

Abstract

The main objective of aerospace industry is to produce all electric aircraft (AEA) equipped by electrical devices in coming developments. Electrical machines that provide higher torque densities are gaining more interest for researchers to obtain sustainable direct-drive electrical propulsion system for aircraft applications. In addition to lesser weight and higher torque density, a machine should be “fault tolerant” to applied in aerospace applications. A novel machine for high starting torque, identified as flux switching machine (FSM) was established over the last decade. FSMs comprise all effective sources on stator including robust rotor structure. These machines exhibited higher “torque-to-weight ratios” and reliability. Nonetheless, the challenge of developing a machine suitable for aircraft applications goes far beyond electromagnetic design and much deeper into the field of mechanical systems than traditional ones. Thus, a new double stator (DS) hybrid excitation (HE) FSM design employing segmented rotor is proposed and analyzed in this research work. The suggested design for DS HE-FSM comprises of six field excitation coils (FECs) and six permanent magnets (PMs) as their excitation sources. In this research, investigation of DS HE-FSM is accomplished with respect to flux linkage, back EMF, cogging torque and torque analysis based on 2D FEA.

Comparison of Modular Stator 1-phase per Module with Switched Reluctance Motor

“…The resultant flux in Figure 3 and Figure 4 depicts the operating principle, where the rotating motion and the flux interaction create angle shifting. The resulting flux of MSOR FSPM in Figure 3 shows a sinusoidal phase shift of angle -8° while SS-HESRM is precisely at the correct angle [22]. The graph verifies that the maximum resultant flux of MSOR FSPM is 0.021 Wb which is lower than the AC flux only by 0.031 Wb.…”

NPN Sziklai pair small-signal amplifier for high gain low noise submicron voltage recorder

“…At higher frequencies the matched Sziklai pair device current gain is β 2 whereas for unmatched Sziklai pair it is β 1 × β 2 [12]. The lower quiescent current makes Sziklai pair thermally stable than Darlington pair and also shows better linearity [13]. This paper covers detailed analysis of NPN Sziklai pair small-signal amplifiers under CE and CC configurations with matched pair of BJTs.…”