| 摘要 |
FIELD: electricity. ^ SUBSTANCE: invention relates to the field of electric engineering, in particular to semiconducting equipment, and may be used in electric rolling stock to control traction AC electric machines, AC electric motors in technological plants, thermal-electric plants and other electric energy loads, which receive supply from electric AC and DC circuit. Device comprises single-phase transformer with sectioned secondary winding, inlet converter is connected to section taps. Arms of inlet converter consist of two serially connected diodes, thyristors and opposite parallel connected two-operational instruments. AC circuit includes accumulators of electric energy of large capacitance, which produce voltage divider and reactors. Reverse bridge diodes and additional diode provide for charging of energy accumulators due to energy of reactors. Smooth change of current in circuit "intermediate accumulators of energy - windings of AC electric machine" and in circuit "intermediate accumulators of energy - secondary winding of converting transformer" is carried out with the help of two-operational instruments of autonomous voltage inverter and inverter led by circuit with the help of pulse control and pulse modulation methods. In method of power control and device consumed power and efficiency of recuperation is controlled by smooth change of input electric resistance of device. ^ EFFECT: increased power coefficient, electromagnetic compatibility and expansion of functionality. ^ 3 cl, 1 dwg |
