Design; Cooling - BMW I01 Product Information

I01￿High-voltage￿Components
9.￿Range￿Extender￿Electrical￿Machine
The￿range￿extender￿electrical￿machine￿is￿installed￿in￿the￿rear￿of￿the￿I01.
9.3.￿Design
The￿range￿extender￿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￿located￿outside￿around￿the￿rotor.￿It￿is￿shaped￿with￿iron￿cores￿through￿the￿3-phase￿coils.￿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).
9.3.1.￿Cooling
Connections￿for￿coolant￿lines
Index
1
2
3
4
5
144
Explanation
Range￿extender￿electrical￿machine
Connection￿for￿coolant￿line￿(supply)
Connection￿for￿coolant￿line￿(return)
Retaining￿springs￿for￿the￿coating
Ventilation