The launching ceremony for a demonstration project of all-electric bus
system was held recently in Beijing.
After the ceremony, some 20 buses will hit the road in two batches,
including six equipped with a new driving system developed by researchers
from the CAS Institute of Electrical Engineering.
According to CAS researchers, their technology could make the vehicles
up to advanced world level in late 20th century. For instance, its vector-
controlled system contains a 100/160KW AC asynchronous motor with the peak
power of 160kW and peak torque of 850Nm, which could meet the start, uphill
and acceleration needs of the vehicles in full capacity. Its nearly 90%
efficiency and energy regenerative control features a upgrading of the
vehicle's range on one charge. And its CAN communication protocol ensures
the stable communication among various systems of the bus.