High power low voltage electrified powertrain

摘要

An electrified powertrain includes an electric motor having four or more coils corresponding to four or more AC phases and configured to generate drive torque to propel an electrified vehicle. The electrified powertrain also includes a low voltage electrical system comprising independent battery modules each configured to output a separate low DC voltage, and a power inverter module (PIM) configured to receive each of the separate low DC voltages from the battery modules, generate a separate low AC voltage for each AC phase using all of or fewer than all of the separate low DC voltages, and output the separate low AC voltages to the coils of the electric motor to drive the electric motor to generate the drive torque to propel the electrified vehicle, wherein none of the separate low DC voltages are electrically isolated and none of the separate AC voltages are considered high voltage.

主权项

1. A high power, low voltage electrified powertrain for an electrified vehicle, the electrified powertrain comprising:
a single electric motor having four or more coils corresponding to four or more alternating current (AC) phases, wherein the single electric motor is the only electric motor of the electrified powertrain that is configured to generate drive torque that is sufficient to propel the electrified vehicle; and a low voltage electrical system comprising: four or more independent battery modules each configured to output a separate low direct current (DC) voltage; and a single power inverter module (PIM) configured to: receive each of the separate low DC voltages from the battery modules; generate (i) a separate low AC voltage for each AC phase using the separate low DC voltages or (ii) a separate low AC voltage for each AC phase using fewer than all of the separate low DC voltages; and output the separate low AC voltages to the coils of the electric motor to drive the electric motor to generate the drive torque that is sufficient to propel the electrified vehicle, wherein none of the separate low DC voltages are electrically isolated, wherein a sum of the separate low DC voltages is greater than 100 volts DC.