Technical Parameters Basic Info Brand: Alstom Converteam Model: EP3-E-4-EN (EPIC-III European standard version) Form Factor: 3U slide-in rack pluggable card Application: Urban metro, light rail vehicle traction cabinet master controller Matching rack: Alstom standard traction converter backplane rack Power Supply Rated input: DC 24V on-board control power Operating range: 18 VDC ~ 30 VDC Max power consumption: 17W Built-in protection: Reverse polarity diode, TVS surge filter, hardware overcurrent fuse Core Control Performance Main chip: High-speed floating-point DSP processor Torque closed-loop cycle: ≤100μs Program memory: 2MB non-volatile Flash Fault storage: Over 1000 timestamped fault records + real-time waveform snapshot Control algorithm: Asynchronous motor FOC vector control, regenerative braking control, hardware overcurrent interlock Signal Interfaces Analog input: Multi-channel 4–20mA temperature, DC-link voltage, AC current sensor sampling Encoder ports: Dual incremental encoder channels for motor speed and position feedback Isolated DI: 16-channel DC24V contact feedback for brake, contactor, safety interlock Fast transistor DO: 8 channels for IGBT trigger board drive Communication: Proprietary internal rack bus + vehicle CAN bus Mechanical Specs Dimension: H130 mm × W100 mm × D220 mm PCB protection: Full acrylic conformal coating, anti-moisture, anti-corrosion, anti-mold Front panel: LED indicators for Power, Run, Fault, Communication status Lock buckle: Anti-looseness fastener for vehicle continuous vibration Railway Environmental & Compliance Operating temperature: -25 ℃ ~ +70 ℃ Storage temperature: -40 ℃ ~ +85 ℃ Humidity: 5%–95% non-condensing Vibration standard: IEC 61373 rolling stock Shock resistance: 15g half-sine impact EMC: EN 50121-3-2 railway vehicle electromagnetic compatibility Fire standard: EN 45545-2 HL2 low smoke flame retardant