Design of Single-Chip Microprocessor-Based Controller for Current Source Inverter-Fed Induction Motor Drive

The single-chip microcomputer MC68701-based inverter gating system is proposed in this paper. The three-phase converter and inverter gatings occur independently and the current source inverter-fed induction motor controller with voltage feedback is also implemented in a single microprocessor. The accuracy of gating is about 1 deg in converter delay angle at line frequency 60 Hz and 0.19 percent in inverter frequency at output frequency 60 Hz. The proposed system is applied to 100-hp induction motor drive.