Performance and stability analysis of an AC variable speed drive

Rae, Andrew Stewart (2006) Performance and stability analysis of an AC variable speed drive. [USQ Project]


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In this dissertation an experimental, speed sensorless, AC variable speed drive is developed from works presented by previous researchers and the performance and stability of the drive is analysed. The experimental drive consists of a simple control algorithm that can be implemented on low cost systems and provides a performance that is superior to standard constant V/f drives. There has been a great deal of research into AC variable speed drives and many different speed control schemes have been developed which range in complexity, performance and cost. Open-loop scalar control techniques are generally the least expensive to implement as no motor speed sensor is required. These techniques are likely to prevail in applications where instantaneous speed and position control of induction motors is not critical. Such applications may include pumps, fans and conveyors. The experimental drive analysed in this dissertation is an open loop scalar control scheme. It utilises field orientation to control the stator voltage in the synchronously rotating frame and employs constant V/f control for basic voltage regulation. Compensation for stator resistance voltage drop and rotor slip are also employed to improve the dynamic performance and to reduce the steady state speed error.

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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Faculty/School / Institute/Centre: Historic - Faculty of Engineering and Surveying - Department of Electrical, Electronic and Computer Engineering (Up to 30 Jun 2013)
Date Deposited: 11 Oct 2007 01:02
Last Modified: 02 Jul 2013 22:43
Uncontrolled Keywords: speed drive; motor; AC; DC; VSD
Fields of Research (2008): 09 Engineering > 0913 Mechanical Engineering > 091399 Mechanical Engineering not elsewhere classified
09 Engineering > 0906 Electrical and Electronic Engineering > 090699 Electrical and Electronic Engineering not elsewhere classified
Fields of Research (2020): 40 ENGINEERING > 4017 Mechanical engineering > 401799 Mechanical engineering not elsewhere classified
40 ENGINEERING > 4008 Electrical engineering > 400899 Electrical engineering not elsewhere classified

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