Elektrische Energietechnik

Electric transmission for hybrid vehicle

“…Moreover, their total power is more than three times less than in the usual scheme. Since to power the excitation winding, an inverter (10) with a power of less than 5% of the power of an electric generator (3) [5] is used, and the second inverter (7), as a rule, is two times less power than in conventional circuits, since it's used to convert traction current from a high-voltage battery (5). Because in conventional circuits, the inverter ( 7) is used to convert current both from an electric generator (3) and from a high-voltage battery (5).…”

“…If with this inverter (10), supply an excitation current with a frequency of 1 Hz into the windings with three pairs of poles of the rotor of the electric generator (3), then, taking into account the rotation of the rotor of the electric generator (3) at a speed of 300 min -1 , (n = 5 sec -1 ), in the three-phase stator windings of the electric generator (3), a current with a frequency of f min = 15 Hz will be generated (see formula 4). When the stator winding of the electric motor (8) is supplied with a current of this frequency, its rotor will rotate at a speed: n rrs = f min / p (5) n rrs = 15 /3 = 5 sec -1 = 300 (min -1)…”

“…The proposed device for electrical transmission allows you to reduce the cost of the inverter (7) AC and reduce energy losses when converting the power flow to control the traction motor (8). It is known that the energy consumption for powering the excitation winding of an alternator is 0.2-0.6% of the electrical power generated by the generator [5,6]. Frequency converters, manufactured at the current level, usually have a high rated load and efficiency, which usually reaches 90% [2].…”