BMW I01 Product Information page 29

I01￿High-voltage￿Components
3.￿Electric￿Motor
Index
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The￿housing￿cover￿must￿be￿replaced￿after￿disassembly￿
The￿screws￿of￿the￿high-voltage￿connections￿(U,￿V,￿W)￿must￿be￿replaced￿after￿each￿disassembly.
The￿rotor￿position￿sensor￿is￿secured￿at￿the￿stator￿of￿the￿electrical￿machine￿and￿works￿according￿to
the￿tilt￿sensor￿principle.￿There￿are￿three￿coils￿in￿the￿rotor￿position￿sensor.￿A￿defined￿AC￿voltage￿is
fed￿to￿one￿of￿the￿coils.￿The￿other￿two￿coils￿are￿each￿moved￿90°.￿The￿voltages￿induced￿in￿these￿coils
provide￿information￿about￿the￿angle￿setting￿of￿the￿rotor.￿The￿rotor￿position￿sensor￿is￿mounted￿by￿the
manufacturer￿of￿the￿electrical￿machine￿at￿the￿corresponding￿alignment￿so￿that￿it￿is￿already￿correctly
adjusted.￿A￿precise￿adjustment￿of￿the￿rotor￿position￿sensor￿is￿effected￿during￿production,￿after￿which
the￿electrical￿machine￿and￿electrical￿machine￿electronics￿are￿joined.￿The￿adjustment￿values￿are￿stored
in￿the￿control￿unit￿of￿the￿electrical￿machine￿electronics.
Neither￿an￿adjustment￿nor￿a￿replacement￿of￿the￿rotor￿position￿sensor￿can￿be￿performed￿in￿BMW
Service.
If￿the￿electrical￿machine￿or￿the￿electrical￿machine￿electronics￿are￿replaced,￿the￿code￿for￿the￿angle￿must
be￿noted￿via￿diagnosis￿in￿the￿electrical￿machine￿electronics.￿The￿code￿for￿the￿angle￿can￿be￿found￿on
the￿type￿plate￿of￿the￿electrical￿machine.
The￿electrical￿connection￿for￿the￿sensors￿of￿the￿electrical￿machine￿and￿the￿electrical￿machine
electronics￿is￿shown￿in￿a￿wiring￿diagram￿in￿the￿chapter￿"Electrical￿interfaces".
Explanation
Outer￿housing
Housing￿cover
Connection￿for￿rotor￿position￿sensor
Temperature￿sensor￿in￿the￿stator
High-voltage￿connection￿U
High-voltage￿connection￿V
High-voltage￿connection￿W
Rotor￿position￿sensor
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