FIELD: electrical engineering. SUBSTANCE: device depends for its operation on controlling rotational frequency of motor by variation between sine-wave and nonsinusoidal-wave voltages due to phase control of sine-wave voltage. It has reactor with E-shaped wound core and I-shaped core. EFFECT: improved reliability. 10 cl, 10 dwg, 6 tbl
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Authors
Dates
2001-01-10—Published
1997-12-19—Filed