Hybrid electric 40 foot heavy duty transit bus
- Kaman Electromagnetic Corp., Hudson, MA (United States)
The authors describe the development of an advanced hybrid electric drive system for a ULEV transit bus. In transit applications, hybrid electric drive systems enjoy distinct advantages over all battery powered electric and conventional diesel drive systems. These advantages include reduced weight, high efficiency, extended range, and reduced emissions. For this application a conventional RTS T80208 transit bus was converted from diesel to hybrid electric drive, consisting of a 190 kW brushless DC permanent magnet traction motor, a propane fueled rotary engine generator set, nickel cadmium batteries, and control and power conditioning electronics. The 120 kW generator set was sized to supply the auxiliary power and mean propulsion power with the engine running at nearly constant speed at its highest efficiency and lowest emission operating point. The nominal 270 volt battery pack was sized to supply peak power of up to 120 kW; battery charging was achieved either through regenerative braking or the generator set. Passenger capacity and operational capability remain unchanged as a result of the conversion. The hybrid electric bus can run urban routes over a ten hour day without refueling or external battery charging. A detailed description of the system is provided in this paper.
- OSTI ID:
- 418635
- Report Number(s):
- CONF-9409454-; ISBN 0-931033-53-5; TRN: IM9703%%31
- Resource Relation:
- Conference: Mass transit system compatibility `94, Dallas, TX (United States), 17-22 Sep 1994; Other Information: PBD: 1994; Related Information: Is Part Of Proceedings of mass transit system compatibility `94; PB: 419 p.
- Country of Publication:
- United States
- Language:
- English
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