Isolated 50 KW DC-DC Convertor- Blueberry 50
Introduction
Blueberry 50 is a precision-engineered, ultra-efficient, high-voltage DC-DC converter built around a Dual Active Bridge (DAB) core. It acts as the heart of modern Solid-State Transformer (SST) architecture, enabling compact, galvanically isolated, and highly modular power conversion for next-generation energy infrastructure.
With >99% peak efficiency enabled by SiC (Silicon Carbide) high-speed switches and optimized magnetic design, Blueberry 50 sets a new benchmark for compact, rugged, and high-density power delivery in harsh environments.
- High Frequency = Smaller Size Operating at 50 kHz enables compact magnetics, reducing the system footprint and increasing dynamic response.
- SiC Advantage Blueberry 50 uses SiC MOSFETs for ultra-fast switching, reduced losses, and high thermal headroom.
- Modular Design for Scalability Multiple Blueberry 50 units can be paralleled to form MW-class DC output using digital current sharing and centralized coordination.
- As the DC-DC stage in modular SST systems
- As a micro-inverter for BESS and EV chargers
- As a DC link interface between high-voltage BESS and medium-voltage DC buses
- As a building block for smart DC grids, ports, and rail electrification
| Parameter | Value | ||||||
| Rated Power | 50 kW per module | ||||||
| Input Voltage Range | 1,800 – 2,200 VDC | ||||||
| Output Voltage Range | 1000 VDC | ||||||
| Isolation Voltage | 40 kV reinforced | ||||||
| Switching Frequency | 50 kHz | ||||||
| Efficiency | >99% (at rated power, SiC-based) | ||||||
| Cooling | Forced air / Optional liquid | ||||||
| Dimensions | Compact 19” rack-mountable / custom chassis |
- Bidirectional Power Flow Enables energy to flow from source to load and vice versa, ideal for BESS, V2G, and regenerative charging.
- Zero Voltage Switching (ZVS) Reduced switching losses, improved thermal stability, and lower EMI.
- Soft Start & Load Balancing Smart load ramping and parallel sync across units allow seamless MW-class configuration.
Each Blueberry 50 can function as a modular DC-DC stage within a solid-state transformer (SST), typically arranged as:
- Stage 1: MV AC to plus 15KV DC
- Stage 2: Blueberry 50-based DAB for isolation and DC voltage transformation
- Stage 3: Final DC delivery to load/BESS/EV
This structure enables direct medium-voltage grid integration, removing bulky transformers and multi-stage converters.
- Megawatt EV Charging Systems Scalable building blocks for 1–10 MW marine and commercial vehicle charging.
- Battery Energy Storage Systems (BESS) Interfaces DC BESS to downstream systems at controlled output.
- Solid-State Transformer Systems Acts as the isolating and voltage conversion stage in high-efficiency SST deployments
- Electric Ports, Airports, and Rail Terminals Reliable, rugged DC backbone for e-mobility hubs and digital substations.
- >99% Efficiency with SiC Switches
Maximizes energy throughput and minimizes thermal losses - 40 kV Reinforced Isolation
Ensures safe operation in marine, aviation, and critical infrastructure - Container-Ready and Rack-Mountable
Flexible formats for integration into mobile or fixed platforms - IEC 61850 / Modbus Integration
Fully digital communication ready for SCADA, EMS, and remote diagnostics - Built for Indian & Global Markets
Designed under MAKE IN INDIA, ready for export certifications, and CPRI testing