About Recharga
Recharga Chargine is a deep-tech renewable energy startup developing the RADAX™ Generator — a modular 3 MW hybrid axial-radial flux permanent magnet generator for direct-drive wind turbines. Our architecture combines two axial-flux modules (0.9 MW each) with one radial-flux module (1.2 MW) on a common shaft, producing 1.44 MN·m of torque at 20–22 rpm with >90% efficiency.
We have completed 2D electromagnetic validation in Motor-CAD and ANSYS Maxwell, filed an Indian patent (No. 202411070882), and are backed by OEM interest with a signed LOI. We are currently in the engineering validation and simulation refinement phase, targeting prototype development as the next milestone.
This is a founding engineering role. You will work directly with our CPO (electromagnetic design lead) and the CEO. Compensation is equity-based — the right candidate sees this as an opportunity to co-build transformative technology and hold meaningful ownership in a company positioned to license IP to global wind OEMs.
The role
We are looking for an engineer who can independently take simulation work from geometry definition through to validated results — and contribute meaningfully to the path from TRL 4–5 to prototype. You will own critical workstreams including 3D EM refinement, structural FEA, thermal analysis, and winding design optimisation, working in close collaboration with the existing engineering team.
What you will work on
- Build and run 3D electromagnetic simulations in ANSYS Maxwell (magnetostatic, transient, eddy current, cogging torque, efficiency mapping)
- Optimise winding configurations — including slot/pole combination studies (e.g. 54-slot/24-pole and 72-slot/12-pole radial designs) to maximise winding factor and eliminate inter-module beat-frequency coupling
- Conduct structural FEA on the rotor-stator assembly for 1.44 MN·m torque loading conditions
- Perform coupled thermal analysis for forced-air and liquid-jacket cooling strategies across modules
- Define and document geometry in ANSYS (STEP file integration, parametric modelling) and resolve simulation file dependencies
- Produce simulation reports with full assumption logs, parameter sweeps, and result interpretation — investor- and OEM-ready quality
- Contribute to magnet geometry refinement (NdFeB N45SH segmented trapezoidal magnets, pole-arc optimisation)
- Support prototype planning: tolerance stack-up analysis, manufacturing feasibility review, and BOM inputs
- Participate in technical due diligence preparation for investor meetings
Required skills & experience
- Strong working knowledge of permanent magnet machine design — radial-flux, axial-flux, or hybrid topologies
- Hands-on experience with ANSYS Maxwell 2D and 3D simulation (geometry build, mesh control, boundary conditions, post-processing)
- Proficiency in Motor-CAD is a significant advantage
- Understanding of winding theory: winding factor, slot-pole combinations, distributed vs. concentrated windings
- Familiarity with structural FEA tools (ANSYS Mechanical or equivalent)
- Ability to interpret and present simulation outputs with full justification — not just results but assumptions, limitations, and design implications
- Degree in Electrical Engineering, Mechanical Engineering, or a closely related field (B.Tech / M.Tech / PhD)
Highly valued
- Prior work on multi-MW generators for wind, hydro, or industrial applications
- Experience with IronPython or Python scripting within ANSYS AEDT for automated parametric simulation
- Exposure to power electronics / DC bus architecture in generator systems (grid-tied inverters, back-EMF, DC bus voltage design)
- Understanding of NdFeB magnet grades, demagnetisation risk, and thermal limits (e.g. Hci behaviour for N45SH)
- Experience writing technical documentation for IP, grant, or investor purposes
- Comfort working in a small, fast-moving team where your output directly defines the company's technical credibility
