Abstract
The generation performance of the switched reluctance machine (SRM)-based starter/generator (S/G) and the doubly salient electromagnetic machine (DSEM)-based S/G is analyzed and compared in this paper. The topologies, operation principles of the doubly salient electromagnetic generator (DSEG) and the switched reluctance generator (SRG) are introduced and investigated comprehensively. The copper loss and iron loss are analyzed and the loss distribution is discussed. The excitation requirement and output power quality are also compared and analyzed. The DSEG has the advantages of employing a reliable rectifier and a simple control method, while achieving higher generation efficiency and better output power quality. The foresaid reason making it a very promising option for the high-voltage DC (HVDC) power system of the more electric aircraft (MEA).
Highlights
In the more electric aircraft (MEA), the on-board centralized hydraulic power system and bleed-air system are being replaced with electrical system based on the electronically controlled electromechanical devices, with greatly improved reliability, and maintenance and support potential, as well as the possibility for significant improvements in terms of weight, volume, and system complexity [1]
The variable frequency AC (VFAC) and high-voltage DC (HVDC) networks are both adopted in the MEA [2]
The doubly salient electromagnetic machine (DSEM) has an independent field winding in the stator, while it inherits the robust rotor structure of the switched reluctance machine (SRM) [9]
Summary
In the more electric aircraft (MEA), the on-board centralized hydraulic power system and bleed-air system are being replaced with electrical system based on the electronically controlled electromechanical devices, with greatly improved reliability, and maintenance and support potential, as well as the possibility for significant improvements in terms of weight, volume, and system complexity [1]. The brushless DC starter/generator (S/G) is an indispensable component of the HVDC power system for MEA [4]. The brushless wound-rotor synchronous starter/generator has convenient voltage regulation and reliable de-excitation ability in case of a failure. The controlled power converter and rotor position detection are indispensable during power, which reduces the system reliability. The doubly salient electromagnetic machine (DSEM) has an independent field winding in the stator, while it inherits the robust rotor structure of the SRM [9]. The reliable diode rectifier and field current regulator are needed for power generation operation. The topologies, operation principles of the doubly salient electromagnetic generator (DSEG) and switched reluctance generator (SRG) are comprehensively analyzed and compared, as well as those generation performance of losses, excitation requirement and output power quality
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