Three-Phase Regenerative Converter with Controlled Flywheeling

The low-speed performance of a dc drive can be improved by operating the three-phase fully controlled bridge converter with controlled flywheeling. The analysis and performance of the drive with controlled flywheeling is described. The modes of operation of the converter system are identified, and a method of performance calculation, taking these modes of operation into account, is presented. Nomograms and the analytical method of calculating them are presented for the calculation of optimum value of filter inductance. The performance of the drive with controlled flywheeling is compared with that with conventional control. The modes of operation and certain aspects of drive performance are verified experimentally.