MG AFC 300 Alternator Field Controller

The MG AFC 300 is an alternator field regulator. It controls the alternator to charge an MG Lithium-Ion battery system. By controlling the field inside the alternator, the current from the alternator can be regulated. Together with a current and a temperature measurement on the alternator it can be protected from overheating. This also allows the AFC 300 to follow the setpoints from the connected BMS to charge the battery system under optimal conditions. The AFC 300 has a build in load dump to protect the alternator, the AFC 300 itself and any connected peripheral equipment. If during the charging phase of the alternator the connected fuse breaks or the main safety contactor inside the BMS opens the AFC 300 will stop the charging of the alternator as quickly as possible and will clamp the voltage overshoot. The AFC 300 supports a wide variety of alternators compatible with external field control. As long as one or both field wires come out of the alternator it can be connected to the AFC 300. The AFC 300 is capable to automatically sense what kind of field is connected. This way there are no different cable harnesses needed for different kinds of alternators. The AFC 300 supports 12 V, 24 V and 48 V battery systems. Interfacing to the BMS is done through M12 CAN-Bus connector. And can be connected to a variety of different BMSs including the MG Master LV, MG SmartLink MX and MG SmartLink Connect. The standard CAN-bus protocol is based on NMEA2000. No additional EMS or PMS is needed, because direct control is possible. To adjust any settings it is possible to directly connect to the AFC 300’s build in Bluetooth module using the MG Connect App. The Bluetooth module can also turned off by a hardware switch if this is required.