I01�High-voltage�Components
3.�Electric�Motor
26
The�graphics�in�this�document�show�the�electrical�machine�and�the�transmission�without�coating.�In
the�production�vehicle�sometimes�these�components�are�still�covered�by�a�foam�part.�This�serves�for
the�acoustic�encapsulation�of�the�electric�motor�and�absorbs�noises�which�the�customer�may�find
irritating.
The�housing�of�the�electrical�machine�is�airtight�and�waterproof,�as�the�low�installation�location
demands�this�and�to�avoid�damage�by�water�passing�through.�However,�due�to�the�big�temperature
differences�which�may�occur�during�operation�there�is�a�need�for�pressure�compensation.�This�is
effected�via�the�shaft�used�for�the�electrical�connection�for�the�electrical�machine�electronics.
The�mounting�and�storage�is�not�only�related�to�the�electrical�machine�itself,�but�also�the�entire�drive
unit�comprising�the�electrical�machine,�transmission�and�electrical�machine�electronics.
Mounting�and�storage�of�the�drive�unit�(without�range�extender)
Index
Explanation
1
Transmission
2
Electrical�machine�electronics
3
Bearing�for�engine�support�arm
4
Engine�support�arm
