Circuit device generating phase-shifted sine wave voltage

Abstract

Abstract PURPOSE: To reduce cost by arranging six resistors in a ring type and connecting the phase windings of a three-phase motor with circuit points of the resistance network. CONSTITUTION: A generator 2, e.g. a tacho generator, which is arranged on the shaft 1 of a polyphase motor generates pulses which are supplied to the clock input side CL of a ring shift register 4 via a sensor 3. The register 4 sends pulses to the output sides A0-A5, in the circulating order. The pulses control in order changeover stages 51-56, which connect a power source 6 of a voltage U with circuit points P or the like of a resistance network 7. A control voltage reaches current amplifier V1-V3 for controlling phase windings S1-S3. The pulses obtained from the register 4 control the electric conduction of a transistor via a switching transistor. Thereby the phase windings are connected with the circuit points P of the resistance network 7.

Inventors

• 👤 Guenter Gleim
• 👤 ギユンター・グライム

Bibliographic Details