BMW I01, Информация о продукте

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I01�High-voltage�Components
3.�Electric�Motor
21
In�the�graphic�only�the�part�of�the�stator�without�coil�is�shown.�The�rotor�consists�of�a�weight-optimized
support�in�the�inside,�a�stack�of�sheets�and�permanent�magnets,�which�are�arranged�in�two�layers.�The
torque�that�can�be�generated�by�the�machine�is�therefore�increased.�The�rotor�is�shrink-fitted�on�the
drive�shaft.
The�number�of�pole�pairs�of�6�is�a�good�ratio�between�the�justifiable�complexity�of�the�design�and
represents�a�constant�torque�curve�for�each�revolution�where�possible.
The�electrical�machine�of�the�I01�does�not�have�an�oil�filling.�Only�the�two�grooved�ball�bearings�which
include�a�grease�filling�are�lubricated.�The�cooling�of�the�electrical�machine�is�effected�using�coolant,
which�is�conveyed�from�the�output�of�the�electrical�machine�electronics�to�the�electrical�machine.�In
the�electrical�machine�the�coolant�flows�through�a�spiral-shaped�coolant�duct,�which�runs�at�the�outer
side.�Two�O-rings�at�the�housing�ends�seal�the�coolant�duct.�The�inside�of�the�electrical�machine�is
therefore�completely�"dry".
Cooling�of�the�electrical�machine
Index Explanation
1 Connection�for�coolant�line�(input�of�electrical�machine,�coming�from�the
electrical�machine�electronics)
2 Outer�housing
3 Connection�for�coolant�line�(output�of�electrical�machine,�to�the�radiator)
4 O-ring
5 Cooling�duct