BMW I01, Информация о продукте

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I01�High-voltage�Components
3.�Electric�Motor
29
Index Explanation
1 Electrical�machine�electronics�(entirety)
2 EME�control�unit
3 High-voltage�battery
4 Bidirectional�DC/AC�converter
5 Actual�electrical�machine
6 Temperature�sensor�in�the�stator
7 Temperature�sensor�in�the�stator
8 Rotor�position�sensor
9 Electrical�machine�(entirety)
There�is�a�high-voltage�interface�and�a�low-voltage�interface.�The�high-voltage�interface�is�made�up�of
three�phases.�A�bidirectional�DC/AC�converter�in�the�electrical�machine�electronics�generates�three-
phase�AC�voltage,�which�is�transmitted�to�the�coils�in�the�stator�of�the�electrical�machine.�With�this�the
electrical�machine�is�controlled�and�its�operating�mode�–�as�an�engine�or�alternator�–�is�specified.�The
electrical�lines�or�connections�are�screwed�and�concealed�under�a�lid.
The�low-voltage�interface�consists�solely�of�the�signal�lines�of�the�following�sensors:
• Temperature�sensors�of�stator�coil�(2x)
• Temperature�sensor�of�rotor�(at�a�bearing)
• Rotor�position�sensor.
The�electrical�machine�electronics�measures�the�electrical�resistance�of�the�two�temperature�sensors,
which�are�designed�as�negative�temperature�coefficients,�and�thus�determines�the�temperatures�at
the�two�locations�in�the�electrical�machine.�In�addition,�the�electrical�machine�electronics�generates
AC�voltage�for�the�rotor�position�sensor�and�evaluates�the�signals�of�this�sensor�(two�induced�AC
voltages).�The�electrical�connection�consists�of�a�plug�connection,�which�is�concealed�under�the�same
lid�as�the�high-voltage�connection.
3.2.�Transmission
3.2.1.�Introduction
The�transmission�of�the�I01�must�fulfil�the�following�tasks:
• Transmission�of�engine�speed�and�torque�from�the�electrical�machine�to�the�output�shafts
• Engine�speed�adjustment�between�the�two�output�shafts�or�sprockets
• Securing�the�vehicle�against�rolling�away.
To�fulfil�these�tasks�the�transmission�contains�the�subcomponents�listed�below: