| Abstract |
This paper describes the control aspects of the 1.2 MVA IGBT traction drive for transit car. In case
of traction drive, the input LC filter is located between the inverter and the pantograph terminal in
order to reduce the ripple current from the supply current and harmonic current from the inverter. And
the vector controlled inverter with high power density and fast torque response acts like a negativeresistance
to the input LC filter and causes the resonance and instability. So the high performance
vector control strategy for traction drive requires an effective control algorithm to stabilize the
resonance of input LC filter. In this paper, the instability problem of the filter is investigated and an
effective damping algorithm for vector controlled traction drive is proposed. And to prove the
validation of the proposed control, the experimental results, performed on Seoul metro line using real
transit cars with 1.2MVA IGBT inverter systems, are presented. |
