Multi-phase rectifier currents

The paper deals with a modified theory of multi-phase rectifier currents. This theory is based on the fact that all system currents, i.e. the rectified secondary line and phase, as well as the primary, currents in the feeding transformer, depend algebraically on the harmonics of the current through a single rectifier element. It suffices, therefore, to know all components of this current in order to compute the currents in all rectifier circuits. After a classification of all rectifier connections into three groups, the `element¿ current is computed and the above-mentioned proof given. The theory provides closer insight into the rectification mechanism, is very easy to apply, is more exact, and permits calculation of the torques produced in d.c. machifles by higher-current harmonics or the heating of rectifiers.