I01�High-voltage�Components
10.�REME
150
10.1.�Introduction
The�main�task�of�the�range�extender�electrical�machine�electronics�is�to�control�the�range�extender
electrical�machine.�It�converts�the�direct�current�voltage�from�the�high-voltage�battery�into�a�three-
phase�AC�voltage�(up�to�about�420 V�AC)�for�the�activation�of�the�range�extender�electrical�machine�as
an�engine.�Currents�of�up�to�200�A�can�flow.�Vice�versa,�when�the�range�extender�electrical�machine
works�as�an�alternator,�the�range�extender�electrical�machine�electronics�converts�the�three-phase�AC
voltage�of�the�range�extender�electrical�machine�to�a�direct�current�voltage�and�can�thus�supply�the
energy�for�the�electric�motor�of�the�I01.�The�continuous�phase�currents�of�about�130�A�flow.�For�these
two�operating�modes�a�bidirectional�DC/AC�converter�is�necessary�which�can�work�as�both�an�inverter
and�a�rectifier.
The�entire�range�extender�electrical�machine�electronics�of�the�I01�is�located�in�an�aluminium�housing.
This�housing�accommodates�the�control�unit�and�the�bidirectional�DC/AC.
The�range�extender�electrical�machine�electronics�is�a�high-voltage�component�
Only�Service�employees�who�satisfy�all�the�prerequisites�are�permitted�to�work�on�the�designated
high-voltage�components:�suitable�qualifications,�compliance�with�the�safety�rules,�procedure
following�the�repair�instructions�to�the�letter.
The�diagnosis�and�repair�of�the�high-voltage�components�is�only�allowed�in�a�retail�service
center�that�has�qualified�and�certified�service�technicians.�These�technicians�must�have
completed�the�ST1403b�I01�High�Voltage�Battery�and�Maintenance�instructor�led�course�and
successfully�passed�the�hands�on�certification.
The�housing�of�the�range�extender�electrical�machine�electronics�cannot�be�opened�in�Service.
The�range�extender�electrical�machine�electronics�of�the�I01�was�developed�and�supplied�by�Bosch.
The�efficiency�of�the�REME�is�96%.�The�weight�of�the�REME�is�about�6 kg.
10.2.�Installation�location�and�mounting
The�range�extender�electrical�machine�electronics�is�installed�in�the�rear�of�the�I01,�in�an�area
separated�from�the�luggage�compartment.
