The paper first refers to the Ferraris-Arno system of single-phase to 3-phase conversion, giving the reasons for its popularity. This introduction is followed by a description of the system with a reference to Prof. Arno, its inventor, and then by a more detailed description of how the phase convertor or #x201C;pilot motor#x201D; functions. Limitations of the simple Ferraris-Arno system are enumerated.The capacitor Ferraris-Arno system, which is a development of recent years and posseses advantages over the conventional system, is described. Then follows a description of the multi-capacitor Ferraris-Arno system which is a logical development of the capacitor system.Reference is made to the system as a means of solving certain single-phase motive-power problems, and a system designed to give very close voltage regulation when required is described briefly.
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