A battery-electric version of Proterra’s 35-foot transit bus (earlier post)—the EcoRide BE35—is equipped with a UQM PowerPhase 150 propulsion system. The BE35 is being showcased on a four-city California clean bus tour which began in San Jose on 6 February.
The 35-foot EcoRide transit bus seats 37 passengers and features a lightweight composite body. The PowerPhase 150 electric propulsion system produces peak torque of 650 Nm (479 lb-ft) and peak power of 150 kW (201 hp). The system has a continuous torque rating of 400 Nm (295 lb-ft) and a continuous power rating of 100 kW (134 hp). The system also features optimized four-quadrant performance, dynamic torque, speed and voltage control, regenerative braking and system energy efficiency of over 90% across substantially all of its performance regime.
The BE35 also features:
A TerraVolt Energy Storage System, incorporating a Li-ion pack from Altairnano, with battery management system;
Flexible ProDrive and vehicle control system that can operate in battery-electric mode or with any small auxiliary power unit (APU) to extend vehicle range when needed;
All-electric components optimized through vehicle management systems to reduce energy usage throughout the vehicle’s operating cycle; and
Regenerative braking system utilizing the UQM PowerPhase 150 that enables the EcoRide BE35 to recapture over 90% of the vehicle’s kinetic energy available during braking.
Proterra has also developed a hydrogen fuel cell variant—the HFC35—which will be put into service in Burbank, California in Spring 2009.