BMW I01 Product Information page 22

I01￿High-voltage￿Components
3.￿Electric￿Motor
Position Meaning
1 Engine￿developer
2 Engine￿type￿(outer
diameter￿of￿stack￿of
sheets)
3 Change￿to￿the￿basic
engine￿concept
4 Machine￿type￿(engine
procedure)
5￿+￿6 Torque
7 Type￿test￿concerns
(changes￿that￿require
a￿new￿type￿test)
For￿the￿electrical￿machine￿EMP242.130.01.250(300)-A3-X1￿the￿engine￿identification￿looks￿like￿this:
IB1P25B.
3.1.2.￿Technical￿data
The￿electrical￿machine￿in￿the￿I01￿is￿a￿synchronous￿machine.￿Its￿general￿structure￿and￿operating
principle￿correspond￿to￿those￿of￿a￿permanently￿excited￿synchronous￿machine￿with￿internal￿rotor:
The￿rotor￿is￿located￿inside￿and￿is￿equipped￿with￿permanent￿magnets.￿The￿stator￿is￿ring-shaped￿and
arranged￿outside￿around￿the￿rotor.￿It￿is￿formed￿by￿the￿3-phase￿coils￿which￿are￿housed￿in￿the￿grooves￿of
the￿stator.￿If￿a￿3-phase￿AC￿voltage￿is￿applied￿to￿the￿stator￿coils,￿they￿generate￿a￿rotating￿magnetic￿field,
which￿"pulls"￿the￿magnets￿in￿the￿rotor￿(in￿engine￿operation).
16
Index
G
I
J
A
B
C
D
E
0￿or￿1
2￿to￿9
N
U
O
P
R
S
T
0￿to￿...
A
B￿to￿Z
Explanation
Electrical￿machine￿in/at￿the
transmission
Electrical￿machine,￿BMW
Electrical￿machine,￿external
<￿200 mm
>￿200 mm￿<￿250 mm
>￿250 mm￿<￿300 mm
>￿300 mm
Outer￿rotor￿with￿small￿diameter
Basic￿engine
Changes,￿e.g.￿variation￿of￿sheet
cut￿(even￿numbers￿reserved￿for
motorbikes,￿odd￿numbers￿for
passenger￿cars)
Asynchronous￿machine
Direct￿current￿machine
Axial￿flow￿machine
Permanently￿excited￿synchronous
machine
Switched￿reluctance￿machine
Electrically￿excited￿synchronous
machine
Transverse￿flow￿machine
e.g.￿25￿=￿250 Nm
Standard
Acc.￿to￿requirements,￿e.g.
adaptations￿to￿length￿and￿coils