Starting and Charging: Description and Operation

GF54.10-P-2005FL DC/AC Converter Function

Function requirements, general
^ Circuit 15R ON

The electronic ignition lock control unit (N73) makes available the circuit status of circuit 15 via the interior CAN (CAN B).

DC/AC converter, general
Only electrical small devices may be connected which require a supply with 115 V AC voltage.

The rear SAM control unit with fuse and relay module (N10/2) controls the function of the DC/AC converter control unit (N24/3).
The insertion of a 115 V-consumer in the 115 V socket (X58/34) is detected via the socket microswitch (X58/34s1). The rear SAM rear SAM control unit supplies the socket microswitch with voltage. If a consumer is connected to the 115 V socket, this voltage is transmitted to the control input of the DC/AC converter control unit. The DC/AC converter control unit converts the DC voltage of the on-board electrical system into a 115 V AC voltage. An LED integrated into the 115 V socket indicates the availability of AC voltage.

The maximum available electrical permanent load is P = 150 W, briefly up to P = 300 W is permissible for t = 2 s

If the temperature inside the DC/AC converter control unit exceeds a defined limit value or if the output load exceeds the overload limit of P = 160 W for t = 2 s, the DC/AC converter control unit switches off.
A calculation method stored in the DC/AC converter control unit prevents the converter constantly switching between ON and OFF, when it moves in the proximity of the limit value
When the energy management determines undervoltage, the DC/ AC converter control unit is switched off and thus the power supply of the socket 115 V is interrupted.