Thesis-1978-Aksel.pdf (18.07 MB)
Download fileA delta–sigma-modulated speed control system for induction motors
thesis
posted on 2018-08-15, 11:18 authored by Alpaslan AkselThe electronic control techniques used in static frequency changers
differ considerably, depending on the type of system considered and the
particular specifications and requirements. Mark-space ratio control and
pulse-width modulation are among techniques already well-established for
use with induction motors to provide a variable-speed a.c. drive.
The project is concerned with the applicability of delta-sigma
modulation as the basis of a novel method of electronic speed control.
The techniques involved are well-known in communication systems, where they
are extensively used in the transmission of speech signals. With a sine
wave at the input, a delta–sigma modulator produces an output quantised in
both voltage and frequency, which enables power control to be achieved from
a fixed d.c. supply using only a single power controller. [Continues.]
History
School
- Mechanical, Electrical and Manufacturing Engineering