JR Hokkaido delivered 735 series experimental vehicles to evaluate the
suitability of aluminum alloy hollow extrusions construction for lightweight
in the cold climate of Hokkaido. They were tested in winter conditions
from 2010 to 2011. The cab ends, which use steel construction to secure
the strength, are similar to those of 731 series. Their livery is a metallic
gray without the waistline strip. Their floor level is 100 mm lower than
731 series to discontinue the step at the doorway. The vehicle design incorporates
the shrouding of the under-floor equipment against snow.
Although passenger accommodation was also based on that of the 731 series,
they differ from 731 series in discontinuing tip-up seating besides the
doors. 735 series are equipped with the semi-automatic doors. Passengers
can open or close doors manually by pushing buttons. The air curtains for
preventing from open-air coming in are fitted on doorways.
3-car trains consist of a motored intermediate car and two trailer end
cars. Intermediate cars are equipped with a current collector, the transformer,
and the traction system. The 2 level AVAF (Adjustable Voltage Adjustable
Frequency) inverter controls traction motors, N-MT735, rated at 230kw on
track basis. Maximum service speed is 120km/h. Regenerative brake is available
until 0km/h. Bolster-less bogies adopt the yaw dampers to ensure smooth
ride characteristics even at 120km/h. their journal box supporting system
is axle arm type.
735 series are used in the suburban services in the Sapporo area, Hokkaido. |
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