Analysis of an AC-DC full-controlled converter supplying two DC-series-motor loads

Abstract EN

Phase-controlled converters are widely used because these converters are simple, less expensive, reliable, and do not require any communication circuit.

Series motors are extensively used in many applications that require both high starting torque and essentially constant horse power.

This paper is concerned with the detailed study of the performance characteristics of an AC-DC full-controlled converter supplying two DC-series-motor loads.

The converter loads combination is simulated on a digital computer.

Different modes of operation (continuous and discontinuous converter currents) are considered.

The critical firing angle at which the mode of operation changes from one mode to another is deduced.

The performance characteristics such input power factor, supply current distortion factor, supply current fundamental power factor, torque speed, and motor current ripple factor have been derived and studied for both constant firing angle and constant load factor have been derived and studied for both constant firing angle and constant load power of one motor.

Waveforms for each load current and converter current are investigated for different modes of operation.