A High-Performance Pulsewidth Modulator for an Inverter-Fed Drive System Using a Microcomputer
- 1 March 1983
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Industry Applications
- Vol. IA-19 (2), 235-243
- https://doi.org/10.1109/tia.1983.4504187
Abstract
An Intel 8086 microcomputer-based pulsewidth modulator (PWM) is described which receives digital voltage and frequency commands independently at the input, generates precision three- phase PWM waves at the output, and can be used to drive a transistor or thyristor inverter for ac drive systems. A computation intensive uniform sampling technique is used in the low-frequency region, whereas the higher frequency region is based on word recognition and pattern retrieval method. A laboratory breadboard of the modulator has been built and tested for the frequency range 0-250 Hz with resolution of 0.0077 Hz and smooth voltage variation up to square wave within a one-percent step in the whole range. The modulator has been extensively tested with a transistor inverter and hybrid computer simulated induction motor drive system and shows performance improvement over the currently available techniques.Keywords
This publication has 5 references indexed in Scilit:
- Microprocessor Based Sinusoidal PWM Inverter by DMA TransferIEEE Industrial Electronics Magazine, 1982
- Adjustable speed AC drives—A technology status reviewProceedings of the IEEE, 1982
- Optimum PWM waveforms of a microprocessor controlled inverterPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1978
- Optimal Pulsewidth Modulation for Feeding AC MotorsIEEE Transactions on Industry Applications, 1977
- New sinusoidal pulsewidth-modulated invertorProceedings of the Institution of Electrical Engineers, 1975