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.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0707106-102246 |
| Date | 07 July 2006 |
| Creators | Sung, Gang-neng |
| Contributors | none, none, Chua-Chin Wang, none |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0707106-102246 |
| Rights | not_available, Copyright information available at source archive |
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