| 摘要 |
FIELD: electrical engineering. SUBSTANCE: device has Schmitt flip-flop, driven multivibrator, complementing flip-flop, M-bit binary counter, decoder, mode control unit RS flip-flop, and electronic switch. EFFECT: improved noise immunity, provision for maintaining sinusoidal waveform of motor supply voltage in the course of its speed control, improved service life of motor due to reduced wear of its commutator and brushes as result of electric erosion. 2 dwg,
|
