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A Six-Phase Current Reconstruction Scheme for Dual Traction Inverters in Hybrid Electric Vehicles with a Single DC-Link Current Sensor

A Six-Phase Current Reconstruction Scheme for Dual Traction Inverters in Hybrid Electric Vehicles with a Single DC-Link Current Sensor

Abstract:

This paper presents a six-phase current reconstruction   scheme   for   dual   traction   inverters   in   hybrid electric vehicles with a single DC-link current sensor. During the     phase current reconstruction, one of the inverters is proposed to operate using active vectors while the other inverter operates using non-active vectors. An advanced phase shift scheme for all PWM signals based on the sequence of duty cycles is implemented. PWM signals are considered in three types of large, medium, andsmall duty cycles.  Then, the minimum phase shift scheme  is   applied  for  each  type  of  PWM  signals  to  ensure  the  minimum duration  of  the  active  vector  for  stable  current  reconstruction With this proposed phase shift scheme, the  maximum  allowable  modulation index and a DC-link voltage utilization is improved.

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