HYBRID ELECTRIC VEHICLE

摘要

A hybrid electric vehicle includes a high voltage DC bus and an internal combustion engine. The internal combustion engine is mechanically coupled to a non self-excited generator/motor which is preferably a switched reluctance machine. A power inverter electrically and bidirectionally couples the high voltage DC bus to the non self-excited switched reluctance generator/motor. Front and rear axle dual DC-AC inverters electrically and bidirectionally couple two traction AC non self-excited switched reluctance motors/gear reducers to the high voltage DC bus for moving the vehicle and for regenerating power. An ultracapacitor coupled to the high voltage DC bus. A bidirectional DC-DC converter interposed between a low voltage battery and the high voltage DC bus transfers energy to the high voltage DC bus and ultracapacitor to ensure that the non self-excited switched reluctance generator/motor operating in the motor mode is able to start the engine.

主权项

1. A series-electric hybrid vehicle, comprising:
a non self-excited generator/motor for providing power to said vehicle for propulsion and operation thereof; a high voltage DC bus; a plurality of wheels which propel said vehicle; one or more non self-excited AC traction motors/generators; one or more compact dual inverters convey power bi-directionally between said high voltage DC bus and said one or more non self-excited AC traction motors/generators which are affixed, respectively, to one or more of said plurality of wheels; said compact dual inverters associated with said non self-excited AC traction motors/generators are configured to operate in a generator mode or in a motor mode; said non self-excited AC traction motors/generators are configured in combination with said wheels to provide propulsion and regenerative braking; an internal combustion engine; said internal combustion engine coupled to said non self-excited generator/motor for providing power to said vehicle for propulsion and operation thereof; said non self-exciting generator/motor coupled to an inverter, said inverter supplies power bidirectionally to and from said high voltage DC bus, said inverter supplies power to said high voltage DC bus when said non self-excited generator/motor operates in said generator mode, and, said inverter supplies power to said non self-excited generator/motor when said non self-excited generator/motor operates in said motor mode; an ultracapacitor bank, said ultracapacitor bank electrically coupled to said high voltage DC bus; said ultracapacitor bank stores regenerative energy from said non self-excited AC traction motors when operating in said motor mode; and, said ultracapacitor bank stores supplies energy to said inverter coupled to said non self-excited generator/motor operating in said motor mode for starting said internal combustion engine; a conventional low voltage system with at least one 12 or 24 volt DC battery; a bidirectional DC-DC converter to convey power between said 12 or 24 volt DC battery and said ultracapacitor bank for purposes of pre-charging said ultracapacitor bank to start said internal combustion engine and to maintain the state of charge of said 12 or 24 volt battery after said internal combustion engine is started.