The rear en­gine

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This is the pri­mary mo­tor of the e-tron and is slightly more pow­er­ful than the one at the front axle with 140kW and 314Nm of power and torque re­spec­tively. Again this can be boosted for 8 sec­onds to 165kW and 355Nm of max power and torque. Be­cause of space con­straints this mo­tor is mounted coax­i­ally on the rear axle.

Both the front and rear mo­tor is sup­plied and con­trolled by its own power elec­tron­ics mod­ule, which works to­gether closely and ex­tremely dy­nam­i­cally with the drive con­trol unit. The power elec­tron­ics mod­ules read sen­sor data 10,000 times per sec­ond and the out­put cur­rent val­ues for the elec­tric mo­tors. These two iden­ti­cal power elec­tron­ics mod­ules are po­si­tioned on the elec­tric mo­tors and are in­te­grated into the ther­mal man­age­ment sys­tem of the drive sys­tem. They take up lit­tle space, and each weighs only 8kg. One of the mod­ule’s main jobs is to con­vert the di­rect cur­rent from the bat­tery into three-phase cur­rent. When the elec­tric mo­tor op­er­ates as a gen­er­a­tor dur­ing re­cu­per­a­tion, it con­verts the gen­er­ated three-phase cur­rent into di­rect cur­rent and feeds it back to the bat­tery.

Sub­frame/ rub­ber mount • Subframeame con­nec­tion to body • First de­cou­pling level En­cap­su­la­tion of elec­tric mo­tor • Open pore PU foam & ab­sorp­tion ofmo­tor noise Mo­tor mount / rub­ber mount • Mo­tor con­nec­tion to thesub­frame • Sec­ond de­cou­pling level Mo­tor sup­port madefrom alu­minium

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