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The demise of mixed-signal and RF circuit design in nanometer CMOS technologies was predicted, analyzed and well documented since the advent of 65nm technologies. [1–3]. Poor device matching, low intrinsic device gains, gate leakage, nonideal and poor quality passives, and myriad reliability constraints, such as electromigration and voltage limitations, have been identified as potential barriers to...
This paper presents a development of switched reluctance motor (SRM) with 0.1mm airgap length by which high efficiency as well as high torque density can be expected as a 400W machine for servo drive application. A SRM with 0.1mm airgap length is designed by genetic algorithm-based optimum design approach so as to be compatible with an existing 400W permanent magnet synchronous servo motor from viewpoints...
This paper proposes a simplified and fast evaluation method of the drive characteristics of claw-pole type PM stepping motors whose dimensions are given. The proposed method consists of a geometric flux-tube-based non-linear magnetic analysis and a dynamic simulator based on an analytical expression of the magnetizing curves obtained from the non-linear magnetic analysis. The proposed method allows...
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