DEVICE FOR CONTROL OF THREE-PHASE COMMUTATOR Russian patent published in 1997 - IPC

FIELD: electric engineering. SUBSTANCE: device has first group of three diodes which are connected by means of their anodes, second group of two diodes which are connected to by means of their cathodes, first and second control buttons. Three resistors and two diodes are introduced to accomplish the goal of invention. Cathode of first introduced diode is connected to cathodes of diodes of second group. Anodes of diodes of second groups are connected through resistors to control electrodes of similitude transistors of two phases. Anode of first diode is connected through resistor and OFF contact of control button to control electrode of similitude transistor of third phase. Cathodes of diodes of first group are connected to output terminals of device. Anodes of diodes of first group are connected to cathodes of diodes of second group. One terminal of ON contact of second control button is connected through cathode of second diode to anodes of diodes of first group. Its another terminal is connected to one phase of supply line. EFFECT: increased reliability, decreased level switching interference. 1 dwg