E-Mobility Infrastructure

EV Fast Charger Power Stages

Silicon Carbide (SiC) resonant LLC and active Power Factor Correction (PFC) power modules engineered for high-density DC fast charging dispensers and high-power onboard systems.

Zero-Voltage Switching (ZVS): Resonant LLC topology operating at high switching frequency with near-zero switching losses.

Wide 200V - 1000V DC Output: Accommodates legacy 400V passenger vehicles and next-generation 800V commercial e-truck architectures.

Active PFC (> 0.99 PF, THDi < 3%): Satisfies IEEE 519 grid interconnection guidelines and minimizes utility penalties.

Request EV Module Integration Specs Direct Engineering (info@vqnix.com)

Module Specifications

EV Power Stage Engineering Data

Hot-swappable 19-inch rack format or standalone sub-assembly for DC charging cabinet integration.

Engineering Metric	VQN-EV-20kW	VQN-EV-30kW (SiC)	VQN-EV-40kW (SiC Liquid-Cooled)
Input AC Voltage	3-Phase 380V ~ 480V AC ± 15%	3-Phase 380V ~ 480V AC ± 15%	3-Phase 380V ~ 480V AC ± 15%
Input Power Factor	> 0.99 at > 50% Load	> 0.995 at full load	> 0.995 at full load
Input Current THD (THDi)	< 4%	< 3%	< 2.5%
Output DC Voltage Range	200V - 750V DC	150V - 1000V DC Ultra-Wide	150V - 1000V DC Ultra-Wide
Peak Power Conversion Eff.	95.8%	96.8%	97.4% Peak
Power Density	35 W/in³	48 W/in³	65 W/in³ (Liquid cold plate)
Switching Technology	High-Speed Si Superjunction + SiC	All-SiC MOSFETs (1200V / 35mΩ)	Gen-3 SiC Half-Bridge Modules
Communication Bus	Dual Isolated CAN 2.0B (BMS / Charger Controller Interface) & RS485
Isolation Rating	3.75 kV AC Hi-Pot Input to Output Isolation

Conversion Stages

Two-Stage Resonant Power Conversion

VQNIX separates the power conversion architecture into an optimized Active Power Factor Correction (PFC) boost stage followed by an isolated LLC resonant DC-DC converter.

By operating the LLC converter at or near its resonant frequency, the primary switching devices undergo Zero-Voltage Switching (ZVS) and the secondary diodes undergo Zero-Current Switching (ZCS). This eliminates capacitive turn-on spikes and reverse-recovery ringing, keeping radiated EMI exceptionally low.

Key Safety & Protection Features

Insulation resistance monitoring & DC ground fault detection
Output reverse-voltage prevention (battery backfeed protection)
Over-temperature thermal foldback for high ambient climates (> 50°C)
Hardware cycle-by-cycle overcurrent and fast short-circuit cutoff
Grid surge immunity compliant with IEC 61000-4-5 Class 4