Alternator field controller MG AFC 300 - 12/24/48 V

The MG AFC 300 is an alternator field regulator. It controls the alternator to charge an MG lithium-ion battery system by following the BMS instructions. It measures current and temperature to protect the alternator from overheating and includes load-dump overvoltage protection.

The MG AFC 300 is designed to operate with 12 V, 24 V or 48 V battery systems.

The MG AFC 300 integrates load dump protection to safeguard the alternator, the regulator itself, and any connected peripheral equipment. If, during the charging phase, a connected fuse blows or the BMS main safety contactor opens, the AFC 300 stops charging the alternator as quickly as possible and limits overvoltage.

Yes, the MG AFC 300 protects the alternator from overheating. It uses current and temperature measurements to regulate the alternator field and keep it within safe thermal limits.

The standby power consumption of the MG AFC 300 is 1.2 W.

The MG AFC 300 housing has an IP22 protection rating.

The MG AFC 300 regulator has the following dimensions:

Length: 255 mmWidth: 132 mmHeight: 63 mm

The weight of the MG AFC 300 regulator is 1.5 kg.

The MG AFC 300 housing is made of ABS (reinforced) and PC ABS.

The MG AFC 300 is designed to operate within a temperature range of -20 to +50 °C.

The MG AFC 300 is compatible with the following MG battery management systems: MG Master LV, MG SmartLink MX, and MG SmartLink Connect.

The MG AFC 300 uses an M12 CAN Bus data connection for interfacing with the BMS.

Yes, the CAN-bus protocol used by the MG AFC 300 is based on NMEA 2000.

The MG AFC 300 supports a wide range of alternators compatible with external field control, provided at least one or both field wires are accessible. It automatically detects field polarity.

No, no additional Energy Management System (EMS) or Power Management System (PMS) is required, as direct control is possible via the BMS.

The MG AFC 300 regulator can be configured using its built-in Bluetooth module via the MG Connect app. It is possible to adjust settings such as excitation type and limits. The Bluetooth module can be disabled by a hardware switch if necessary.

The following items are not included and must be provided separately for installation:

Temperature sensorCurrent sensorCAN cables and excitation harnessAlternatorPower protectionsNMEA 2000 accessories

Yes, it is necessary to add a current measurement and a temperature probe on the alternator to allow the MG AFC 300 to protect it against overheating and to regulate the charging effectively.

Cables and protection devices must be sized for a maximum current of 300 A to ensure a safe and efficient installation.

Contact/activation input: 0–60 V, with ≥ 7 V corresponding to high/active state.Programmable input: 0–60 V, with ≥ 7 V corresponding to high/active state.Programmable output: Voltage equals the field supply +, with a current of 0.5 A, and is protected against short circuits and overcurrent.W/tachometer input: Accepts 0 to 58 Vpp.