Download Tram Service in Urban Mass Public Transport

Reconstructed trams: T3R.PLF
Power electronic controlled
Vznik typu T3R.PLF
• Trams of the type T3 were producted in
more 14000 pieces–
• The resistance current control was changed
in electronic puls current control. They are
many variants – Example is type T3R.PLF
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Transport parameters
• 22 sittig places
• 105 standing places
• Place for baby cars and for disabled
people cars
• Flore elevation above platform 350 / 860
mm
• vmax 65 km/h
• Information systém for passengers
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Mechanics
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Car length 15100 mm
Car width 2480 mm
Car high 3190 mm
Empty car mass 20,5 t
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Vozová skříň
• Car body quite new.
• Partly low floor
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Bogie and drive
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Bogie the same as in T3
Drive arrangement the same as in T3
Higher motor output
Body spring arrangement the same like in
T3
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Brakes
• Electrodynamic brakes motor are loaded into
resistances
– Main brake
• Elektromechanical disk brake on the traction
motor shaft
– Pressure on braking plates by springs / electromagnet
release of braking by electromagnet. It serves for
parking and emergency case.
• Elektromagnetical friction rail brake
Emergency
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Elektric equipment and axiliary
drives
• Cooling ventilators are driven by
asynchronous motors supplied by
frequency convertors
• Car network 24V= from battery. Charched
from electronic convertor
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Electric equipment – traction
drive
• Traction DC motors are the same but have
insulation in class H. Output is higher44
kW
• TM are supplied with electronic pulse
converters
– Energy saving
– Easier mentanance ~ minimum kontacts
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TV Progress
• Electronic converter with 6 transistors for
current pulse control. IGBT transistors.
• Converter controls traction motor current
and excitation current in both revolutions
(back and head) in driving and braking
regimes.
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Scheme of power convertor part
T1 ÷ T6 ~ IGBT with
revers diods
Lb ~ Excitation winding
K ~ Motor anchor
Ib ~ Excitation current
measurement
Ik ~ Anchor current
measurement
+/- ~ DC cercuit voltage
Symetry with respect K
for opposite driving
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direction.
Both directions
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Driving regime – driving with power
•T4 switched. Driving
direction
•T5 pulsates and
controls traction current
• Symetry in case of
opposite driving
direction. In such a
case T1 will be
continuasly switched on
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Driving regime – free driving
•T5 switches off and T6
opens. The current
quickly dissapears.
• Symetry in case of opposite
driving direction.
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Driving regime – field weakaning
•T3 swithes on and
pulsates
• Symetry in case of opposite
driving direction.
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Driving regime - excitation
•T1 switches on and
pulsates
• Symetry in case of opposite
driving direction. T1 is
switched on and T4
pulsates
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Braking regime – anchor is short
circuited against excitation winding
• T4 je switched off.
• T1 is switched on.
Traction motor is
quickly excited.
• Symetry in case of opposite
driving direction.
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Braking regime – energy
recovering
•T1 is switched off and
the anchor current
recovers the enrgy into
DC circuit and from DC
cercuit into trolley, if it is
possible. Otherwise the
energy is burned in the
braking resistance.
• Symetry in case of opposite
driving direction.
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Braking regime– exciting current is
never sudenly switched off
•When T1 switches off
the exciting current is
maintained with diodes
in T3 and T2
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References
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www.prazsketramvaje.cz
www.cegelec.cz
www.pragoimex.cz
www.kos.cz
Patent CZ 8766 U1
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