BMW I01, Информация о продукте

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I01�High-voltage�Components
3.�Electric�Motor
47
Index Explanation
1 Accelerator�pedal�module
2 Signal,�accelerator�pedal�angle
3 Electronic�gear�selector�switch�(GWS)
4 Operating�signals�of�the�electronic�gear�selector�switch
5 Battery�management�electronics�(SME)
6 Signals�about�the�state�of�charge�and�the�available�electric�power�of�the�high-
voltage�battery
7 Dynamic�Stability�Control�(DSC)
8 Signals�about�the�dynamic�handling�characteristics,�e.g.�the�driving�speed
9 Electrical�Digital�Motor�Electronics�(EDME)
10 Electrical�machine
11 Phase�voltages�for�the�coils�of�the�electrical�machine
12 Electrical�machine�electronics�(EME)
13 Requested�drive�torque�(engine/alternator)
14 Electric�coolant�pump
15 Power�requirement�at�electric�coolant�pump
16 Electric�fan
17 Power�requirement�at�electric�coolant�pump
18 Instrument�cluster
19 Display�information�on�the�condition�of�the�electric�motor�and�Check�Control
messages�in�the�event�of�a�fault
The�upper�graphic�shows�that�the�EDME�control�unit�acts�as�a�master�and�coordinator�for�the�primary
functions�of�the�drive�control.
Before�a�drive�torque�is�applied,�the�EDME�must�check�whether�the�driving�readiness�is�established.
The�EDME�also�queries�whether�all�subsystems�of�the�electrical�drive�train�are�functioning�trouble-
free,�which�is�also�a�prerequisite�for�the�provision�of�a�drive�torque.�Finally,�the�EDME�still�has�to
consider�the�available�electrical�power�for�the�electric�motor�which�is�primarily�determined�by�the
condition�of�the�high-voltage�battery.�The�SME�control�unit�communicates�this�condition�to�the�EDME
control�unit�via�corresponding�bus�signals.�As�a�result�of�these�checks�the�EDME�identifies�whether
and�in�what�scope�the�drive�torque�can�be�provided.�In�the�case�of�fault�statuses�or�in�the�event�of
limited�availability,�the�EDME�issues�an�appropriate�Check�Control�message�via�the�instrument�cluster.
The�functions�described�here�can�be�summarized�under�the�term�"Operating�strategy".
An�important�input�signal�for�the�determination�of�the�drive�torque�is�the�accelerator�pedal�angle,�which
is�transmitted�via�direct�wiring�from�the�accelerator�pedal�module�to�the�EDME.�Using�this�signal�the
EDME�determines�the�torque�request�of�the�driver.�The�EDME�must�compare�and�coordinate�this
torque�request�and�any�other�torque�requests�made�at�the�same�time,�for�example�from�the�cruise
control�or�the�DSC.�Using�this�input�information�the�EDME�can�calculate�the�actual�drive�torque
required�of�the�electrical�machine.