BMW I01, Информация о продукте

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I01�High-voltage�Components
3.�Electric�Motor
17
Principal�structure�of�the�synchronous�machine
Index Explanation
A Conventional�synchronous�machine
B Synchronous�machine�in�the�I01
1 Stator
2 Stack�of�sheets,�rotor
3 South�pole�of�a�permanent�magnet
4 North�pole�of�a�permanent�magnet
To�improve�the�technical�data�the�structure,�primarily�of�the�rotor,�was�modified�and�optimized.�The
rotor�has�a�new�arrangement�of�the�permanent�magnets�and�a�stack�of�sheets�which�has�a�positive
influence�on�the�characteristic�of�the�magnetic�field�lines.�On�the�one�hand,�this�improves�the�torque.
On�the�other�hand,�there�are�lower�current�levels�in�the�stator�coils,�whereby�the�efficiency�is�increased
in�comparison�to�a�conventional�synchronous�machine.
The�impressive�performance�data�are�summarized�in�the�following�table.
Nominal�voltage 360 V
Nominal�current 400 A Actual�value
Maximum�peak�output 125 kW/170 bhp for�a�maximum�duration�of�30 s
Maximum�continuous�output about�75 kW continuous
Maximum�torque 250 Nm/184�lb-ft in�the�engine�speed�range
0 – 5,000 rpm.
Maximum�engine�speed about�11,400 1�min.
Weight about�49 kg
The�maximum�power�of�125 kW�can�only�be�made�available�for�a�maximum�duration�of�30�s.
Otherwise,�the�components�of�the�drive�train�would�be�damaged�through�overheating�–�this�affects�not
only�the�electrical�machine,�but�also�the�high-voltage�battery�and�the�electrical�machine�electronics.
The�maximum�power�applies�for�the�motor�operation�–�in�theory�it�could�also�be�used�in�the�alternator