Electrical Design Engineer (eVTOL Power Systems)

このポジションは、eVTOL（電動垂直離着陸機）の開発チームに所属し、高電圧（600-800VDC）および低電圧（28VDC）の電気システムの設計・統合を担当します。電気インターフェース制御文書（ICD）の作成・維持、電気アーキテクチャの設計・解析、コンポーネント選定、負荷解析、回路図の解釈・作成、接地・ボンディングの確保、統合テストやトラブルシューティングの支援など、航空機の安全性と信頼性を確保するための幅広い業務に携わります。機械、ソフトウェア、システムエンジニアリングチームと密接に連携し、設計レビューや安全評価にも参加します。

Responsibilities

• Develop and maintain Electrical Interface Control Documents (ICDs) between subsystems and components.
• Design, analyze, and review HV (600–800VDC) and LV (28VDC) electrical power distribution architectures.
• Select and specify HV and LV electrical components such as fuses, contactors, circuit breakers, relays, DC-DC converters, Power Distribution Units (PDUs), connectors and bus bars ensuring proper electrical ratings, interface compatibility, and safety compliance.
• Author and maintain LV and HV load analysis documentation, including system-level power balance and component-level current/voltage evaluation.
• Interpret and create electrical schematics, ensuring correct signal flow and system functionality.
• Define and verify analog and discrete signal interfaces (e.g., GND open, 28V open, pull-up/pull-down logic).
• Ensure proper electrical grounding and bonding practices are implemented across systems.
• Support troubleshooting, integration testing, and verification of electrical systems at the vehicle and subsystem levels.
• Collaborate closely with mechanical, software, and system engineering teams to ensure robust electrical integration.
• Participate in design reviews, safety assessments, and compliance activities related to electrical systems.
• Deep analysis (e.g. Power balance, Short Circuits) and Simulation capabilities for electrical power generation and distribution systems
• Ability to evaluate transient effects on voltage and current magnitudes either by testing or simulating.
• Contribute to the development of system documentation, wiring diagrams, and harness definitions in collaboration with design and manufacturing teams.

Requirements

• 5+ years of experience in electrical system design, analysis, or integration (automotive, industrial, rail, marine, or aerospace).
• Proven ability to create and manage electrical interface documentation (ICDs, wiring diagrams, etc.).
• Strong understanding of:
• HV and LV power distribution systems
• Circuit protection (fuses, breakers, contactors, relays)
• Signal interfaces (analog/discrete I/O)
• Electrical grounding and bonding principles
• Proficiency in interpreting schematics, harness drawings, and connector pinouts.
• Familiarity with DC power electronics such as converters, inverters, and batteries.

Nice to have

• For HV load analysis, a solid understanding of battery cell electrical behavior (voltage, current, internal resistance, and temperature effects) is preferred to accurately model and predict system performance.
• Experience with CAD/electrical design tools (e.g., Capital, Zuken E3, AutoCAD Electrical, Altium).
• Understanding of aviation electrical standards (e.g., DO-160, DO-254, MIL-STD-704, ARP4754A).
• Exposure to certification or safety-critical environments (automotive ISO 26262, aerospace, rail, or energy).
• Experience with system integration or test environments involving HV and LV systems.

Benefits

• 115 days off per year（Saturday / Sundays / Newyear holidays（12/29～1/3） / Company designated holidays）
• Annual paid leave
• Refresh leave (Granted after 1, 3, 4, 5 years of service)
• Commuting allowance, business trip allowance, moving allowance, etc.
• Relocation Packages
• Health insurance
• Employee pension (according to Japan standards)
• Employment insurance
• Worker’s accident compensation insurance