With the rapid development of urban air mobility and port logistics intelligence, electric Vertical Take-Off and Landing (eVTOL) aircraft for port container transport have become a key solution for improving logistics efficiency and reducing carbon emissions. Their powertrain and auxiliary power systems, serving as the "heart and energy core" of the entire aircraft, require highly reliable, efficient, and power-dense power conversion and control for critical loads such as lift/cruise motors, flight control systems, and power distribution units. The selection of power semiconductors directly determines the system's overall efficiency, power-to-weight ratio, operational safety, and lifespan. Addressing the extreme demands of eVTOL for safety, efficiency, weight, and harsh environment operation, this article centers on scenario-based adaptation to reconstruct the power device selection logic, providing an optimized solution ready for direct implementation.

图1: 港口集装箱低空转运 eVTOL方案与适用功率器件型号分析推荐VBL1105与VBA3205与VBP165I60产品应用拓扑图_en_01_total

I. Core Selection Principles and Scenario Adaptation Logic

Core Selection Principles

High Voltage & Robustness: For high-voltage bus systems (typically 400V-800V DC), devices must have sufficient voltage margin (≥50% of bus voltage) to withstand switching transients, regenerative braking spikes, and environmental stress.

Ultra-Low Loss & High Current: Prioritize devices with extremely low on-state resistance (Rds(on) or VCEsat) and excellent switching characteristics to minimize conduction and switching losses, maximizing flight time and payload.

Package & Thermal Excellence: Select packages like TO247, TO263 offering superior thermal impedance and power handling to manage high heat flux in compact spaces, balancing performance with weight.

Mission-Critical Reliability: Devices must meet stringent aviation-grade reliability standards for continuous and peak operation, with focus on thermal stability, short-circuit withstand capability, and vibration resistance.

Scenario Adaptation Logic

Based on the core electrical system architecture of eVTOLs, power device applications are divided into three main scenarios: Main Propulsion Motor Drive (High-Power Core), Auxiliary Power Distribution & Management (Low-Voltage Support), and High-Voltage DC-Link & PFC Stage (Power Conversion). Device parameters and characteristics are matched accordingly.

II. MOSFET/IGBT Selection Solutions by Scenario

Scenario 1: Main Propulsion Motor Drive (50kW-200kW per motor) – High-Power Core Device

Recommended Model: VBL1105 (Single N-MOSFET, 100V, 140A, TO263)

Key Parameter Advantages: Utilizes advanced Trench technology, achieving an ultra-low Rds(on) of 4mΩ at 10V Vgs. A continuous current rating of 140A supports high torque demands during takeoff and landing for 100V-class powertrain systems.

Scenario Adaptation Value: The TO263 package offers an excellent balance of high current capability, low thermal resistance, and moderate footprint. Ultra-low conduction loss is critical for maximizing overall propulsion efficiency and reducing heat sink weight. Its fast switching capability enables high-frequency PWM control for smooth motor operation and precise thrust control.

Applicable Scenarios: Multi-phase inverter bridge drives for high-power BLDC/PMSM lift and cruise motors in eVTOL powertrains.

图2: 港口集装箱低空转运 eVTOL方案与适用功率器件型号分析推荐VBL1105与VBA3205与VBP165I60产品应用拓扑图_en_02_propulsion

Scenario 2: Auxiliary Power Distribution & Management (12V/24V/48V Systems) – Low-Voltage Support Device

Recommended Model: VBA3205 (Dual N+N MOSFET, 20V, 19.8A per channel, SOP8)

Key Parameter Advantages: Integrated dual 20V N-MOSFETs with high parameter matching. Rds(on) as low as 3.8mΩ at 10V Vgs. Low gate threshold voltage (0.5-1.5V) allows direct drive by low-voltage logic (3.3V/5V).

Scenario Adaptation Value: The compact SOP8 package saves valuable PCB space in avionics bays. The dual-channel design is ideal for redundant power path switching, load distribution, and hot-swap control for avionics, sensors, lighting, and communication modules. High efficiency minimizes heat generation in enclosed compartments.

Applicable Scenarios: Solid-state power switching, OR-ing diodes, and DC-DC converter synchronous rectification in low-voltage auxiliary power networks.

Scenario 3: High-Voltage DC-Link & PFC Stage (400V-800V DC Bus) – Power Conversion Device

Recommended Model: VBP165I60 (IGBT with FRD, 600/650V VCE, 60A, TO247)

Key Parameter Advantages: Features Field Stop (FS) technology, offering a low VCEsat of 1.7V at 15V VGE, balancing conduction loss and switching performance. Integrated Fast Recovery Diode (FRD) simplifies circuit design.

Scenario Adaptation Value: The high-voltage IGBT in a robust TO247 package is well-suited for the demanding environment of a battery charger's PFC stage or a high-voltage DC-DC converter in the ground support equipment or onboard power generation system. It provides robust short-circuit withstand capability and reliable operation at lower switching frequencies typical for these stages, ensuring stable high-voltage bus generation and power quality.

Applicable Scenarios: Power Factor Correction (PFC) circuits in charging systems, high-voltage DC-DC converters for auxiliary power generation, and other high-voltage, medium-frequency switching applications.

III. System-Level Design Implementation Points

Drive Circuit Design

VBL1105: Requires a dedicated high-current gate driver IC with sufficient peak current capability. Attention to layout for minimal power loop inductance is critical. Use Kelvin source connections if possible.

VBA3205: Can be driven directly by MCUs or logic-level drivers. Include series gate resistors for damping. Consider back-to-back MOSFETs for true bidirectional load switching if needed.

VBP165I60: Pair with an IGBT driver IC offering negative gate bias for reliable turn-off and DESAT protection. Optimize gate resistance to manage switching speed and EMI.

Thermal Management Design

图3: 港口集装箱低空转运 eVTOL方案与适用功率器件型号分析推荐VBL1105与VBA3205与VBP165I60产品应用拓扑图_en_03_auxiliary

Hierarchical Strategy: VBL1105 and VBP165I60 require dedicated, possibly liquid-cooled or forced-air-cooled heatsinks due to high power dissipation. VBA3205 can rely on PCB copper planes and airflow within the avionics compartment.

Derating & Margin: Apply stringent derating rules (e.g., 50% current derating, 80% voltage derating). Design thermal interfaces to keep junction temperatures at least 25°C below maximum rating under worst-case ambient conditions (e.g., 55°C+).

EMC and Reliability Assurance

EMI Suppression: Implement snubber circuits across VBP165I60 and VBL1105 to control voltage slew rates. Use low-ESR/ESL capacitors at bus terminals. Proper shielding and filtering for all gate drive paths.

Protection Measures: Implement comprehensive protection: DESAT and short-circuit protection for IGBTs/MOSFETs, TVS diodes on all gate and power terminals for surge/ESD, and current sensing with fast shutdown capability. Redundant power paths for critical auxiliary loads using VBA3205.

IV. Core Value of the Solution and Optimization Suggestions

The power semiconductor selection solution for port container transport eVTOLs proposed in this article, based on scenario adaptation logic, achieves comprehensive coverage from megawatt-level propulsion to milliwatt-level auxiliary control. Its core value is mainly reflected in:

Maximized Powertrain Efficiency & Range: Utilizing the ultra-low Rds(on) VBL1105 for motor drives and the optimized IGBT VBP165I60 for power conversion minimizes losses across the high-power energy chain. This directly translates to extended flight time, increased payload capacity, or reduced battery weight—a critical competitive advantage.

图4: 港口集装箱低空转运 eVTOL方案与适用功率器件型号分析推荐VBL1105与VBA3205与VBP165I60产品应用拓扑图_en_04_conversion

Enhanced System Safety & Redundancy Through Integration: The dual MOSFETs in VBA3205 facilitate the design of redundant and fault-tolerant power distribution networks for avionics, a key requirement for flight safety. The robust selection of high-voltage devices ensures stable operation of the core electrical bus under dynamic load conditions and potential transients.

Optimal Balance of Performance, Weight, and Cost: The chosen devices represent mature, high-volume technologies offering the best performance-to-cost ratio for their respective roles. Compared to emerging wide-bandgap solutions, this portfolio provides a lower-risk, highly reliable path to certification while meeting stringent efficiency and power density targets necessary for viable eVTOL operations.

In the design of power systems for port logistics eVTOLs, power device selection is a cornerstone for achieving the trifecta of safety, efficiency, and reliability. This scenario-based selection solution, by precisely matching device capabilities to specific electrical system demands and integrating robust drive, thermal, and protection strategies, provides a comprehensive and actionable technical foundation. As eVTOL technology evolves towards higher voltages, higher frequencies, and more integrated modular power units, future exploration should focus on the application of SiC MOSFETs for the main inverter and PFC stages, and the development of intelligent power modules that integrate sensing and health monitoring, laying the hardware foundation for the next generation of high-performance, economically sustainable aerial logistics platforms. In the era of smart port logistics, a superior and reliable powertrain is the fundamental enabler for safe and efficient low-altitude transport.