Built for robot joints
Size a direct-drive motor for arms, quadruped legs, humanoid joints, and compact actuators that need low-speed torque, easier backdriving, and force feedback without a gearbox.
Left-drag orbit · Right-drag pan · Scroll zoom · Copper ring = phase winding · Grey claws = SMC C-cores · Red/blue ferrite · Grey wedges = flux concentrators · Silver ring = aluminum hub (shell thickness)
Design warnings
Overall Dimensions
Mass breakdown
Power & Electrical (Peak)
Performance metrics
Torque capacity derivation
Tooling prediction
Non-linear MEC peak torque for go/no-go before cutting motor tooling — Gaussian matrix solve, SMC μ_r(B) saturation curve, co-energy virtual work. Replaces analytical I_sat ceiling.
Efficiency sample map (RPM x current)
Each cell estimates electrical-to-mechanical efficiency at that RPM/current point for the current design. It is not used by the optimizer.
Standard part dimensions
Compare copper, stator C-core, and rotor wedge envelopes across motor configs. Hover a row for where it lands on the model.
About the SuperMotor transverse flux motor simulator
SuperMotor includes a transverse flux motor, or TFM, path for hollow-shaft direct-drive robotics. The TFM uses a different magnetic path than a typical BLDC motor so it can increase pole count and produce more low-speed torque without stretching into a long, heavy package. This simulator lets you compare magnet materials, geometry, cooling, joint targets, and estimated pricing while development is still early.
TFM torque density
The transverse flux architecture should allow more magnetic torque in less space than a conventional BLDC motor and gearbox stack.
Magnet material options
Compare anisotropic Sr-ferrite, iron nitride, SmFeN, and NdFeB to see the tradeoff between domestic simplicity, peak weight, and performance.
Auto-configurator
Enter torque, speed, diameter, axial length, mass, or temperature targets and let the optimizer search for a lighter feasible TFM geometry.
- What does the TFM simulator estimate?
- It estimates motor size, peak and continuous torque, speed, losses, efficiency, thermal behavior, weight, joint fit, and material-only pricing for early design exploration.
- Why model a transverse flux motor for robot joints?
- A TFM can deliver strong low-speed torque in a compact magnetic direct-drive package, which is useful when you want to drop the gearbox from a joint.
- What makes the TFM path different from a BLDC motor and gearbox?
- SuperMotor is being developed as a hollow-shaft direct-drive actuator to reduce gearbox friction, backlash, backdrive force, and actuator complexity.
- Is this simulator a final motor specification?
- No. The numbers are rough estimates for exploration while SuperMotor is still early in development.
About the SuperMotor electrostatic disc motor simulator
SuperMotor also includes an electrostatic disc motor path: a thin stacked-disk actuator that should preserve a hollow shaft while targeting useful joint torque without a gearbox or magnetic materials. This simulator explores disc pairs, dielectric fluid, rotor substrate, high-voltage stator geometry, duty cycle, joint fit, and estimated material pricing while the electrostatic path is still early in development.
Thin disc stack
Model a multi-disc electrostatic stack that should occupy a thin annular region between inner and outer diameter instead of filling the joint center.
Open center for routing
The hollow-shaft layout should leave the center open for joint shafts, wiring, bearings, encoders, slip rings, cooling paths, or other integration details.
Dielectric and disc materials
Explore EC/PC blend dielectric fill, Rogers or other stator/rotor disc laminates, passive flex PCB overlays, potted HV power deck, seal stack assumptions, and how they affect mass and cost.
Auto-configurator
Enter torque, RPM, diameter, axial length, aspect ratio, or mass targets and let the optimizer search disc pairs, OD, sleeve ID, and gap for the lightest feasible stack.
- What does the electrostatic simulator estimate?
- It estimates disc-stack geometry, peak torque, speed limits, dielectric and driver losses, duty-cycle housing temperature, weight, joint fit, and material-only pricing.
- How does the electrostatic disc path differ from the TFM?
- The TFM path uses magnetic torque density and magnet materials. The electrostatic disc path uses a thin stacked-disk layout with a dielectric-filled gap and should not depend on rare-earth or ferrite magnets.
- Why is a hollow-shaft electrostatic disc interesting for joints?
- A thin disc stack naturally wraps around a center bore, which should make it easier to package direct drive around the joint axis while keeping structure and wiring through the middle.
- Is this simulator a final motor specification?
- No. The numbers are rough estimates for exploration while SuperMotor is still early in development.