Optimizing DC-DC converter stability: AC and transient analysis in simulations of source impedance effects
Learn how to optimize DC-DC converter stability through AC analysis in the frequency-domain and transient analysis in the time-domain
Case study: Fuel-cell eVTOL
Providing kilowatts of power for auxiliary systems to a lightweight aircraft
Customer’s challenge
eVTOLs can be used for a variety of purposes, such as urban air mobility, cargo delivery, and emergency response. They are electric vehicles by nature, but they don’t necessarily use traditional batteries: they can also use fuel cells to power the aircraft. This reduces overall weight and allows for longer flight times. However, propulsion fuel cell stacks require a substantial auxiliary power system for pumps, fans, cooling fans, and other controls that require kilowatts of power without adding bulk. The main challenges were:
- Test and implement power solutions quickly and easily to gain competitive time to market
- Manage kilowatts of power without adding much space and weight
- Ensure the highest reliability under extreme operating conditions
The Vicor solution
Vicor high-density power modules effectively manage kilowatts of power within limited space. Their light weight reduces energy needed for flight and optimizes battery usage, providing the manufacturer more flexibility when designing aircraft. Power modules allow for quick testing and implementation and easily adapt to changing power requirements, accelerating time to market.
Key benefits
Key benefits
Power modules can be scaled to meet diverse power requirements
Compact power modules optimize space and weight on the vehicle
Rugged and highly integrated power modules for high reliability
Power delivery network
Uninterrupted operation of critical auxiliary systems is ensured by leveraging a redundant battery system feeding a 40kW auxiliary power supply. The power delivery network utilizes arrays of Vicor DCM™ DC-DC converters connected in parallel, delivering over 10kW of power. Two sets of DCMs with 30V outputs are connected in series for higher power 60V pumps, utilizing the same part number product for most of the 40kw of auxiliary power, be it 24V, 28V or 60V. With up to 97% efficiency, DCMs reduce heat generation significantly, leading to improved thermal management and reliability. They maintain perfect output current sharing, even when connected to different input voltages, ensuring balanced load distribution and optimal performance. An additional Vicor DCM powers the sensitive avionics systems, providing a stable and regulated power source.
Isolated regulated
Input: 9 – 420V
Output: 3.3, 5, 12, 13.8, 15, 24, 28, 36, 48V
Power: Up to 1300W
Peak efficiency: 96%
As small as 24.8 x 22.8 x 7.21mm
Resources
Resources for the design engineer
Quickly modifying a standard SOSA supply to meet an applications hold-up requirements for vehicle protection and countermeasures
Learn how Vicor delivers power to vehicle protection and countermeasures systems using a configured SOSA aligned power supply
Adjusting one of the VITA supply voltage outputs easily and quickly for ground mobile radar
Learn how Vicor delivers power to ground mobile radar using time- and cost-effective Vicor VPX solutions
High reliability VITA 62 supply that handles unique current requirements for aircraft radar
Learn how Vicor delivers power to aircraft radar using high power and high current delivery of Vicor VPX products