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eHD System Options - Coggle Diagram
eHD System Options
Tall HD Frame
(New System Only)
Thruster
Elemental Motor
Elmo Motor Drive
Sea Trials 2025 Q1: Possible
Need to design our own motor control j-box
Weight: 37kg, Controller: XXkg
Elemental Motor
Custom Motor Drive
Sea Trials 2025 Q1: Not Possible
Allows for advanced control that might have significant system weight and volume benefits
Weight: 37kg
Sub-Atlantic e380
(Not Designed Yet)
Sea Trials 2025 Q1: Unlikely
Weight: TBD
SMD Thruster
Controller Bottle
Sea Trials 2025 Q1: Possible
Need to evaluate cost / lead time
Weight: 80kg
Saab Thruster
Controller Bottle
Sea Trials 2025 Q1: Risky?
Need to evaluate cost / lead time
Gear box is big negative.
Weight: XXkg
Innerspace Thruster
Elmo Motor Drive
Sea Trials 2025 Q1: Risky
COTS designs do not meet our specs
Expensive / long lead time
Need to design our own motor control j-box
Weight: XXkg
HPU
Sub-Atlantic HPU
Sea Trials 2025 Q1: Out of Scope
Weight: XXkg
Elemental Motor
Elmo Motor Drive
Sea Trials 2025 Q1: Out of Scope
Weight: XXkg
Elemental Motor
Custom Motor Drive
Sea Trials 2025 Q1: Out of Scope
Weight: XXkg
VDU
Fuse Only
Sea Trials 2025 Q1: Possible
Could be advantageous from weight / simplicity standpoint
Poor troubleshooting
Weight: XXkg
1-ATM Contactor Bottle
Sea Trials 2025 Q1: Likely
Design is almost complete, most parts on order
Weight: 58kg
Solid-State Breaker
Sea Trials 2025 Q1: Unlikely
Research has yet to start, resourcing at 50% max.
Weight: XXkg
SST
As Designed Version
Sea Trials 2025 Q1: Risky
Design likely has significant flaws that were discovered after the design was complete. Likely require limited redesign to address issues.
Weight: XXkg
Can One SST be sufficient instead of two?
Can the SST be made to match the existing HD power level of 112kW?
Sea Trials 2025 Q1: Not Possible
Significant analysis and redesign likely to increase power capability to this level. Significant design miss from early development.
Weight: XXkg - 1 SST, VDU
Light Redesign Effort
Sea Trials 2025 Q1: Possible
Cable shielding / EMI
Resonant heating issues
Weight: XXkg (Same as Above)
Heavy Redesign Effort
Sea Trials 2025 Q1: Unlikely
Above fixes in light redesign effort, plus attacking other high volume issues: Bias Supplies, DC link capacitors, inductors, thermal design, voltage isolation requirements
Weight: XXkg, Likely improvements over existing design
Standard HD Frame
(Retrofitable)