Power Electronics Control Unit, Component Description - GF08.20-P-1001LFH
Engine 276 in model 222.057/157
Engine 276 in model 222.163
Engine 276 in model 222.173
Engine 651.9 in model 222.004/104
Shown on model 222.057
Shown on model 222.163
Location
The power electronics control unit is located in the right side of the engine compartment at the rear.
Shown is the power electronics control unit (except model 222.163, model 222.173)
Location
The power electronics control unit is located at the front right in the engine compartment.
Shown is the power electronics control unit (model 222.163)
Shown is the power electronics control unit (model 222.173)
Structure
In the power electronics control unit there is the power inverter to actuate the electrical machine.
A DC/DC converter is built in to the power electronics control unit to supply the 12 V on-board electrical system (model 222.057/157, 222.004/104 and model 222.173).
Interlock circuit
The interlock circuit is used as contact protection to protect people against inadvertent contact with high-voltage components. The interlock is an anticipatory contact which opens a little before the high-voltage connection when opening a high-voltage connection. In this way timely discharging of the high voltage intermediate circuit is achieved by the control units of the high-voltage components.
For this purpose, a 12 V/88 Hz interlock signal is looped through all high voltage on-board electrical system components that can be removed or opened. To do this there is an electrical bridge in each removable high-voltage connection which interrupts the interlock circuit during removal of the high-voltage connection. The interlock circuit is also led switched in a series over the 12 V control units plug connection of the high-voltage components.
Task
General
The power electronics control unit actuates the electrical machine by request from the CDI control unit (N3/9) (with diesel engine) or the ME-SFI [ME] control unit (N3/10) (with gasoline engine) using 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 CDI control unit or the ME-SFI [ME] control unit.
Engine 276 in model 222.057/157
Engine 276 in model 222.173
Engine 651.9 in model 222.004/104
The DC/DC converter is integrated in the power electronics control unit which produces a high voltage direct voltage and a 12 V direct voltage. The DC/DC converter enables energy exchange between the high voltage on-board electrical system and the 12 V on-board electrical system when it transforms high voltage direct voltage (primary voltage) into 12 V direct voltage (secondary voltage) and vice versa. This allows for the balancing of battery energy between the on-board electrical systems and a starting assistance function given an external voltage of 14 V.
Engine 276 in model 222.163
DC/DC converter control unit
The DC/DC converter control unit is installed in the vehicle as a separate component. The DC/DC converter control converts high-voltage direct voltage (primary voltage) into 12-V direct voltage (secondary voltage) and transfers these between the high voltage on-board electrical system and the 12-V on-board electrical system.
Coding
The power electronics control unit is flashable which means that the complete software in the control unit can be updated.
CAN network
The power electronics control unit is connected via the hybrid CAN (CAN L) to the vehicle CAN network and exchanges data with other control units.
Input and output signals
- Direct input/output signals
- Output connections over a high voltage distributor plate
- CAN input/output signals
Input factors and initial parameters for the following components are read in or output over direct lines by the power electronics control unit and are needed by the engine timing:
| Input factors over a direct line | Initial parameters over a direct line | Supplemental information |
|---|---|---|
| Circuit 30c (crash signal from rear pre-fuse box (F33) | - | - |
| Circuit 30 | - | - |
| Circuit 31 | - | - |
| Circuit 50 to (shut down) from CDI control unit (N3/9) or ME-SFI [ME] control unit (N3/10) | - | CDI control unit except for model 222.163 and model 222.173 |
| Circuit 87f | - | - |
| Engine speed signal (internal combustion engine) | - | TNA |
| Interlock circuit | Interlock circuit | - |
| Electrical machine rotor position sensor (L20) | Power supply for electrical machine rotor position sensor (L20) | - |
| Electrical machine temperature sensor (A79/1b1) | Power supply for the electrical machine temperature sensor | - |
| Low temperature coolant circuit 2 temperature sensor (B11/7) | Low temperature coolant circuit 2 temperature sensor power supply (B11/7) | Only on model 222.173 |
The following component parts are connected via output connections with the power electronics control unit:
| Output connections + | Output connections - | Supplemental information |
|---|---|---|
| High-voltage battery (A100g1) (discharge current) | High-voltage battery (A100g1) (discharge current) | - |
| High-voltage battery (A100g1) (charging current) | High-voltage battery (A100g1) (charging current) | - |
| - | Phase U (actuation for engine operation mode, charging current from alternator operation mode) Electrical machine (A79/1) | - |
| - | Phase U (actuation for engine operation mode, charging current from alternator operation mode) Electrical machine (A79/1) | - |
| - | Phase W (actuation for engine operation mode, charging current from alternator operation mode) Electrical machine (A79/1) | - |
| High-voltage connection for battery management system control unit (N82/2) | High-voltage connection for battery management system control unit (N82/2) | - |
| High voltage positive temperature coefficient heater high-voltage connection (N33/5) | High voltage positive temperature coefficient heater high-voltage connection (N33/5) | Only in model 222.163 and model 222.173 |
| Electrical A/C compressor high-voltage connection (A9/5) | Electrical A/C compressor high-voltage connection (A9/5) | - |
Inputs and outputs to/from the following control units are sent/received by the power electronics control unit via CAN:
| Inputs via hybrid CAN (CAN L) | Outputs via hybrid CAN (CAN L) | Supplemental information |
|---|---|---|
| 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) | only for model 222.163 |
| Charger (N83/5) | Charger (N83/5) | Only in model 222.163 and model 222.173 |
| Powertrain control unit (N127) | Powertrain control unit (N127) | Contained signals of further control units which are connected via the CAN network. |
| Sound generator (H4/16) | Sound generator (H4/16) | Only on model 222.173 |
| Wiring diagram for power electronics control unit, ME05 (Plug-In) | Engine 276 in model 222.163 | PE54.10-P-2106-97SEB | |
| Engine 651.9 in model 222.004/104 | PE54.10-P-2106-97SEA |