Tolerance-Band Controlled Single-Phase Converter Circuit with Optimal Controller Output Selection.

An explanation is given of a single-phase, tolerance band controlled convertor circuit with an optimum selection of manipulated quantities, and which on the primary side derives a current from a single-phase a. c. system, this current being adjustable to practically any phase angle, also capacitively, and being almost sinusoidal, and which gives on the secondary side with constant smooth voltage a d. c. the size of which can be controlled. The circuit working with current tolerance band control makes it possible to transfer the energy derived reactively from a single-phase system to an intermediate circuit with constant direct voltage, and when required rapidly to adjust the energy flow.