Sharing with you some thoughts and findings 
Do not throw that jitter into the bin ! On-board   of   railway   type   vehicles,   Electronic   Brake   Controllers   implementing   Wheel   Slide   Protection   need to   accurately   monitor   the   signals   from   speed   sensors.   On   said   signals,   a   minimal   amount   of   jitter   is unavoidable,   and   it   will   always   be   present   due   to   manufacturing   tolerances,   and   various   other   sources   of background   “mechanical   noise”.   In   a   typical   application   said   minimal   jitter   is   usually   contained   within   ±   1%. Conventional   speed   signals   processing   electronics   disregard   this   modulation   as   merely   one   more   source   of noise, being only interested in the measurement of the frequency of the speed sensor’s output signal. On   the   contrary,   we   have   developed   a   technique   which   does   not   disregard   this   source   of   noise,   but   it instead    includes    specific    means    to    accurately    measure    its    value    (with    microseconds    resolution)    and periodicity   of   occurrence,   with   the   purpose   to   extract   precious   diagnostics   information   about   defects   of   the wheels, bearings, rail track. A Conductance Control Primer Wishing   to   gain   a   better   grasp   of   the   Current   Mode   Control   Technique   (also   called   Conductance   Control, when    the    external    feedback    is    closed    on    the    output    voltage)    in    a    Switching    Mode    Buck    Converter Regulator? Here is a first introductory lecture.                                                                                                                                              Coming soon …   The Parallel Power Regulation Principle Your   input   power   bus   is   a   regulated   bus,   and   to   achieve   the   required   regulation   at   your   output   you   might get   away   by   limiting   to   10%   the   amount   of   throttle   on   the   full   transferred   power.   Then   you   think:   well,   I optimize   the   main   converter   as   an   unregulated   inverter   capable   of   handling   100%   of   the   power,   and   for   that 10%   residual   regulation   a   serially   connected,   lower   power,   converter   would   do   …   and   you   go   on   thinking:   if regulation   can   be   achieved   handling   just   10%   of   the   transferred   powered   with   90%   efficiency,   then   the effective   efficiency   of   the   pre-regulator   function   is   99%   …   wait,   you   are   thinking   too   fast.   A   serially connected   lower   power   regulator   would   still   need   to   handle   the   full   power   through   its   output   rectifiers, whose forward voltage drop would spoil your best hopes. But here is the trick.                                                                                                                                               Coming soon …
C-Sigma s.r.l.      2015
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