Microprocessor controlled PWM inverters for UPS applications

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" Microprocessor controlled PWM inverters for UPS applications "
Khan, Muhammad Zafar Ullah

Document Type	:	Latin Dissertation
Record Number	:	827793
Doc. No	:	TLets254953
Main Entry	:	Khan, Muhammad Zafar Ullah
Title & Author	:	Microprocessor controlled PWM inverters for UPS applications\ Khan, Muhammad Zafar Ullah
College	:	Loughborough University of Technology
Date	:	1989
student score	:	1989
Degree	:	Thesis (Ph.D.)
Abstract	:	This thesis describes the implementation of microprocessor controlled single-phase and three-phase inverters for UPS applications. A carrier frequency of 18 kHz is employed in both cases, and the PWM pulses are generated directly by the microprocessor using the regular-sampled symmetric PWM strategy. Single-edge modulation as well as double-edge modulation has been implemented for single-phase and three-phase systems. Since in general, software implementation of PWM strategies require precalculated pulse width values, a scheme is proposed which enables the large quantity of such data to be handled efficiently. The scheme involves the use of a small program for calculating and transferring the data to the memory of the controller.
Subject	:	Voltage regulation][Power switching device
Added Entry	:	Loughborough University