BMW I01 Product Information page 152

I01￿High-voltage￿Components
9.￿Range￿Extender￿Electrical￿Machine
Rotor￿position￿sensor￿in￿range￿extender￿electrical￿machine
Index
1
2
3
So￿that￿the￿voltages￿for￿the￿coils￿in￿the￿stator￿can￿be￿correctly￿calculated￿and￿generated￿by￿the￿range
extender￿electrical￿machine￿electronics￿in￿terms￿of￿amplitude￿and￿phase￿layer,￿the￿precise￿angle
setting￿of￿the￿rotor￿must￿be￿known.￿This￿is￿why￿there￿is￿also￿a￿rotor￿position￿sensor￿in￿the￿range
extender￿electrical￿machine.
The￿rotor￿position￿sensor￿is￿secured￿at￿the￿stator￿of￿the￿range￿extender￿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￿range￿extender￿electrical￿machine￿at￿the￿corresponding￿alignment
so￿that￿it￿is￿already￿correctly￿adjusted.
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Explanation
Rotor￿position￿sensor￿in￿the￿range￿extender￿electrical￿machine
Connection￿for￿rotor￿position￿sensor
Connection￿for￿temperature￿sensor