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A Low-power 2-dimensional Bypassing Digital Multiplier Design and A Low-power Sensorless Micro-controller for Brushless DC motors

This thesis includes two research topics. The first topic is a low-power 2-dimensional bypassing digital multiplier design. The second one is a low-power sensorless micro-controller for brushless DC motors (BLDCM).
The low-power 2-dimensional bypassing digital multiplier takes advantage of a 2-dimensional bypassing method. The proposed bypassing cells constituting the multiplier skip redundant signal transitions when the horizontally partial product or the vertically operand is zero. Hence, it is a 2-dimensional bypassing architecture. Thorough post-layout simulations show that the power dissipation of the proposed 8 ¡Ñ 8 design is reduced by more than 75% compared to the prior 8 ¡Ñ 8 design with obscure cost of delay and area.
The goal of the low-power sensorless micro-controller for brushless DC motors is to design a BLDCM controller without using any Hall sensor. Back-EMF estimation method using the terminal voltage sensing is adopted for the detection of the commutation moment for the proper commutation control of the BLDCM. The position of the rotor can be precisely estimated by measuring the back-EMF as well as the zero-crossing points.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0707106-102246
Date07 July 2006
CreatorsSung, Gang-neng
Contributorsnone, none, Chua-Chin Wang, none
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0707106-102246
Rightsnot_available, Copyright information available at source archive

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