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GRIDIN Vladimir M. (Moscow State Technical University named N.E. Bauman, Moscow, Russia) – Associate Professor, Cand. Sci. (Eng.) The article considers a tachogenerator containing a synchronous generator with a three phase armature winding, a resistive doubler of the number of phase voltages, two bridge rectifiers of two three phase voltages, and a resistive adder of the output voltages from two rectifiers. The requirements for the doubler and adder are defined. Expressions for the additional rectified three phase voltage and for its increasing factor are obtained. Expressions for determining the sum of two rectified three phase voltages and for the limit values of this sum are given. It has been found that the ripple of output voltage produced by the considered tachogenerator does not exceed 1,5%, which is significantly lower than in the known tachogenerators (3,5–4)%. K e y w o r d s : tachogenerator, phase voltage doubler, rectifiers, adder of rectifier voltages, output voltage ripple

A Contactless DC Tachogenerator with the Doubled Number of Phase Voltages