Linearization of the Transfer Characteristic of a Phase- Controlled Converter Under Discontinuous Conduction
- 1 November 1978
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industry Applications
- Vol. IA-14 (6) , 559-564
- https://doi.org/10.1109/tia.1978.4503592
Abstract
An open-loop control circuit is described which, in conjunction with a cosine wave crossing technique, provides a linear transfer characteristics of a phase-controlled converter under both continuous and discontinuous conduction, regardless of ωL/R values of the load. The nonlinear transfer characteristic between the signal and the output voltage at discontinuous conduction has been counteracted by an inversely nonlinear control function for different ωL/R values. The control functions have been approximated by piecewise linear segments, synthesized by analog circuits, and identified by digital addresses. A complete control circuit has been designed and tested with a single-phase center-tap converter. The experimental results agree well with the theory. The principle can be extended to polyphase and multiquadrant converters.Keywords
This publication has 1 reference indexed in Scilit:
- A Linear SCR Control AmplifierIEEE Transactions on Industry and General Applications, 1968