DC Fast Charger (Level 3)¶

Overview¶

DC fast charging stations deliver high-power DC directly to the vehicle battery, enabling rapid charging (20-40 minutes to 80% SOC). These systems require sophisticated power conversion and thermal management.

Difficulty: Advanced

Status: Placeholder

Specifications¶

Parameter	Value	Unit
Input Voltage	480 VAC 3φ	VAC
Output Voltage	200-1000	VDC
Output Power	50-350	kW
Output Current	0-500	A
Efficiency	>95%	-

Architecture¶

Modular Design¶

       ┌────────────────┐
480V ──┤ Power Module 1 ├──┬──► 50kW
3φ AC  │    (50kW)      │  │
       └────────────────┘  │
       ┌────────────────┐  │
       │ Power Module 2 ├──┼──► +50kW
       │    (50kW)      │  │
       └────────────────┘  │   Paralleled Output
       ┌────────────────┐  │
       │ Power Module N ├──┼──► +50kW
       │    (50kW)      │  │
       └────────────────┘  │
                           ▼
                     [Output Filter]
                           │
                     ─── CCS/CHAdeMO Connector

Single Module Topology¶

3φ AC ─[EMI]─[Vienna/AFE]─[DC Link]─[Isolated DC-DC]─ DC Out
                 │            │
            PFC Stage    LLC/DAB/PSFB

Power Module Options¶

Topology	Power	Efficiency	Bidirectional
Vienna + PSFB	50-100 kW	95%	No
AFE + DAB	50-100 kW	96%	Yes
Vienna + LLC	25-50 kW	97%	No

Control Requirements¶

Output Characteristics¶

Voltage (V)
    │
1000├────────────────────┐
    │                    │
    │    Constant        │ Constant
    │    Current         │ Voltage
    │    Region          │ Region
    │                    │
 200├────────────────────┘
    └────────────────────────► Current (A)
                         500

Communication Protocols¶

Standard	Protocol	Use
CCS	ISO 15118, DIN 70121	Power negotiation
CHAdeMO	CHAdeMO Protocol	Legacy DC charging
OCPP	OCPP 1.6/2.0	Backend communication

Safety Features¶

Ground fault detection (GFCI)
Isolation monitoring
Emergency stop
Cable temperature monitoring
Connector locking
Insulation testing before charge

Circuit Files¶

Status: Placeholder - dcfc_module.ipes - Single 50kW module - dcfc_vienna_pfc.ipes - Vienna front-end - dcfc_paralleled.ipes - Paralleled modules

Placeholder - Details to be added