Slip/slide-readhesion Control by PWM Inverter for Speedup of Shinkansen Train
Tomoki WATANABE, Shintarou OHE, Masamichi OGASA
Regarding slip/slide-readhesion control of electric motor vehicles with three
phase drives, we review adhesion availability problems and study for a method to
get good readhesion characteristics. We propose a uniform measuring method to
estimate readhesion performance and devise a measuring tool to realize this, i.e.
"Traction Tester". Then we point out that an accurate velocity detection is very
important using average pulse width information. And by detecting very small
slip/slide by this velocity detection method we can keep slip/slide velocity at a
low value, say 1 km/h. We prove this by an optimal readhesion control in running
tests of e.m.u.on the premises of RTRI. From these tests we think that an optimal
readhesion control of high speed range around 300 km/h and an available adhesion
coefficient of 6% are feasible.