Component Description For Power Electronics Control Unit - GF08.20-P-1001KJE
ENGINE 780 in MODEL 453.091/391/491
Location
The power electronics control unit (N129/1) is integrated in the high-voltage control unit box (N83).
Task
General
The power electronics control unit actuates the electric vehicle drive motor (M5) on request from the powertrain control unit (N127) with a 3-phase AC voltage. It monitors the temperature and position of the electrical machine and provides diagnoses and forecasts regarding the available torque to the powertrain control unit.
If the electric vehicle drive motor is operated in decel mode as an alternator, the power electronics control unit converts the induced AC voltage into a direct voltage and supplies the high voltage on-board electrical system over a 400 V busbar.
Coding
The power electronics control unit is flashable which means that the complete software in the control unit can be updated.
CAN bus
The power electronics control unit is connected via the electric drive CAN (CAN EL) to the vehicle's CAN network and exchanges data with other control units.
Input and output signals
The power electronics control unit evaluates the following input signals and issues the corresponding output signals:
- Direct input signals
- Direct output signals
- Power connections
- CAN input signals
- CAN output signals
| Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
|---|---|---|
| High voltage interlock "in" from battery management system control unit (N82/2) | - | - |
| - | High voltage interlock "out" to DC/DC converter control unit | - |
| Terminal 30 | - | - |
| Terminal 15 | - | - |
| Terminal 31 | - | |
| Signal from charger control unit (N83/10) | Signal from charger control unit (N83/10) | - |
| Signal from electrical machine rotor position sensor (L20) | - | - |
| - | Ground connection for electrical machine rotor position sensor (L20) | - |
| - | Power supply for electrical machine rotor position sensor (L20) | - |
| Shielding for electrical machine rotor position sensor (L20) | Shielding for electrical machine rotor position sensor (L20) | - |
| Power connections + | Power connections - | Supplemental information |
|---|---|---|
| High-voltage connection for high voltage power distributor | High-voltage connection for high voltage power distributor | - |
| Input factors via electric drive CAN | Initial parameters via electric drive CAN | Supplemental information |
|---|---|---|
| Electric drive control unit (N127) | Electric drive control unit (N127) | Includes signals from other control units that are connected via interior CAN (CAN B). |
| Battery management system control unit (N82/2) | Battery management system control unit (N82/2) | |
| DC/DC converter control unit (N83/1) | DC/DC converter control unit (N83/1) | |
| Charging process monitoring control unit (N83/2) | Charging process monitoring control unit (N83/2) | |
| Control unit of charger for high-voltage battery (7 kW charger) (N83/5) | Control unit of charger for high-voltage battery (7 kW charger) (N83/5) |
| Designation | Unit | Values | Tolerance range | Comment |
|---|---|---|---|---|
| Power electronics control unit (N129/1) | ||||
| Input voltage (12 V) | V | 6... 16 | ||
| V | 14 | Nominal | ||
| Input voltage (high voltage) | V | 65... 150 | ||
| V | 120 | Nominal | ||
| Output voltage (high voltage) | V | 80... 150 | ||
| V | 120 | Nominal | ||
| Output power (high voltage) | ||||
| Electrical machine (M5) | kW | 34.5 | Maximum (230 A) continuous output Maximum (340 A) short-term output (< 2 s) | |
| Electric refrigerant compressor (A9/6) | kW | 4.8 | Maximum | |
| Environmental temperature range (operation) | °C | -40... 125 | 140°C short-term | |
| Special features | Fault detection | |||
| Protection class IP67 and 6K9K (IP68 (fording capability due to an external cable duct)) | ||||
| Codability/flash programmability | Yes/yes |
Structure
The power electronics control unit consists of a plastic housing with three plug couplings and an internal control unit.
Voltage supply
The power electronics control unit is supplied with power by "circuit 30" and, with the ignition ON, by "circuit 15".
| Wiring diagram for high-voltage control unit box | PE54.21-P-2154-97BEA PE54.21-P-2154-97BEB |