BMW I01 Product Information page 67

I01￿High-voltage￿Components
4.￿Electrical￿Machine￿Electronics
Index
10
11
12
13
14
4.1.4.￿Structure￿and￿functions
The￿electrical￿machine￿electronics￿is￿made￿up￿internally￿of￿four￿subcomponents:￿the￿bidirectional￿DC/
AC￿converter,￿the￿unidirectional￿AC/DC￿converter,￿the￿DC/DC￿converter￿and￿the￿EME￿control￿unit.￿The
link￿capacitors￿are￿also￿an￿element￿of￿the￿power￿electronics￿switching￿in￿order￿to￿smooth￿the￿voltage
and￿filter￿high-frequency￿parts.
It￿performs￿the￿following￿functions￿with￿help￿of￿the￿subcomponents￿mentioned:
• Control￿of￿the￿internal￿subcomponents￿by￿the￿EME￿control￿unit
• Supply￿of￿the￿12 V￿electrical￿system￿via￿the￿DC/DC￿converter
• Control￿of￿the￿electrical￿machine￿(engine￿speed,￿torque)￿using￿DC/AC￿converter
• High-voltage￿power￿management
• Contacting￿of￿the￿electric￿motor￿via￿busbars
• Contact￿of￿the￿high-voltage￿battery
• Charging￿the￿high-voltage￿battery￿when￿stationary
• Contact￿of￿the￿convenience￿charging￿electronics
• Contact￿of￿the￿EKK
• Contact￿of￿the￿electric￿heating
• Contact￿of￿the￿Range￿Extender￿Electrical￿Machine￿Electronics
• Communication￿with￿other￿control￿units,￿in￿particular￿the￿EDME
• Cooling￿for￿electrical￿machine￿electronics
• Evaluation￿of￿sensors￿of￿the￿electromechanical￿parking￿lock
• Activation￿of￿the￿electromechanical￿parking￿lock
• Activating￿the￿electrical￿vacuum￿pump
• Active￿and￿passive￿discharging￿of￿the￿link￿capacitors￿to￿voltages￿less￿then￿60 V
• Active￿evaluation￿of￿the￿signal￿for￿the￿high-voltage￿interlock￿loop
• Self-test￿and￿diagnostic￿function
DC/DC￿converter
The￿DC/DC￿converter￿in￿the￿electrical￿machine￿electronics￿of￿the￿I01￿is￿also￿able￿to￿adopt￿the￿following
operating￿modes:
Explanation
Bidirectional￿DC/AC￿converter￿in￿the￿electrical￿machine￿electronics
Overcurrent￿fuse￿in￿the￿supply￿line￿for￿the￿convenience￿charging￿electronics
Overcurrent￿fuse￿in￿the￿supply￿line￿for￿the￿electric￿heating
Overcurrent￿fuse￿in￿the￿supply￿line￿for￿the￿EKK
DC/DC￿converter￿in￿the￿EME
61