Actuat · DM1
DM1
A brushless outrunner motor for multirotor drones and aerial robotics.
Not for sale. No unit has been built or tested.
Part descriptions
- Mounting base
- Carries thrust into the arm and conducts heat out of the stator. The bolt pattern is what airframe designers build around.
- Stator
- Insulated electrical-steel laminations carrying the windings. Thinner laminations cost more to stamp and lose less to iron.
- Windings
- Enamelled copper on the stator teeth. Gauge and turn count set both the motor constant and most of the loss.
- Shaft
- In an outrunner the shaft rotates with the bell. Straightness and the fit at the bell interface directly affect runout, which shows up as vibration at the propeller.
- Bearings
- A preloaded pair carrying propeller thrust and any imbalance. Sets acoustic signature and service life.
- Permanent magnets
- Sintered segments bonded inside the bell in alternating polarity. Grade is chosen for temperature coefficient, not peak strength.
- Rotor bell
- Houses the magnets and closes the magnetic circuit. Its concentricity sets air-gap consistency.
- Retaining hardware
- Circlip or threaded retention, thread-locking compound, and shaft grub screws. Unglamorous, and the usual cause of a motor that comes apart in flight.
- Motor wires
- Three leads with strain relief at the base. A common failure point on production motors.
- Propeller interface
- Threaded shaft or bolt pattern on the bell face. Concentricity and squareness here determine how much of the propeller's imbalance the bearings have to absorb.
Product
What it is.
Actuat's first in-house motor programme, used to develop the electromagnetic, mechanical, controls, testing, and manufacturing capability behind future motion hardware.
Specifications
Design targets, marked as such.
Every figure carries a confidence label. Nothing reads “measured”, because the test bench does not exist yet.
- Stator size
- TBDTBD
- KV
- TBDTBD
- Supported voltage
- 4S – 6S Li-ion / LiPoTGT
- Maximum thrust
- TBDTBD
- Peak efficiency
- TBDTBD
- Weight
- TBDTBD
Full specification table20
- Confirmed— A locked architectural decision
- Measured— From hardware, with stated conditions
- Simulated— Model output, not a specification
- Estimated— Calculated, not measured
- Manufacturer published— Third-party data, not independently verified
- Design target— Engineered toward
- Under evaluation— Options still open
- TBD— Not yet defined
Configuration
Architectural decisions. These are choices rather than measurements.
- Motor type
- Brushless outrunner, three-phase
- Confirmed
Topology is settled. Everything downstream of it is not.
- Stator size
- TBD
- TBD
Quoted as stator diameter × stack height once the packaging and thrust targets are reconciled.
- Pole / slot combination
- 12N14P and 9N12P
- Under evaluation
Both are being evaluated for cogging, winding practicality, and iron loss.
- Winding configuration
- TBD
- TBD
Turn count, strand count, and termination follow from the KV target and slot geometry.
- KV
- TBD
- TBD
A derived property of turns and magnetic design. Will be measured, not specified in isolation.
Electrical
- Supported voltage
- 4S – 6S Li-ion / LiPo
- Design target
Initial target range. Bounds achievable RPM for a given KV.
- Maximum current
- TBD
- TBD
Bounded by winding thermal limit under stated airflow. Requires measurement.
- Peak power
- TBD
- TBD
Peak figures are meaningless without a stated duration.
- Continuous power
- TBD
- TBD
A thermal result at equilibrium, in stated airflow — not a magnetic limit.
- Phase resistance
- TBD
- TBD
Candidate end-of-line test parameter for winding consistency.
Performance
Every figure in this group is a property of a motor–propeller–voltage–controller combination. None can be published without its full test conditions.
- Maximum thrust
- TBD
- TBD
Will be published per propeller and per cell count, never as a single number.
- Peak efficiency
- TBD
- TBD
Thrust per watt of electrical input, at the throttle setting where it peaks — not at full throttle.
- Recommended propellers
- TBD
- TBD
Determined by thermal and efficiency testing across candidate propellers.
- ESC recommendation
- TBD
- TBD
Follows from measured current draw with margin, and from compatibility testing.
Mechanical
- Outer dimensions
- TBD
- TBD
- Weight
- TBD
- TBD
Mass budget allocated per subassembly; no total committed.
- Shaft diameter
- TBD
- TBD
- Bearing configuration
- Preloaded pair
- Design target
Sized for axial thrust and propeller-induced radial load. Specific bearings not selected.
- Mounting pattern
- TBD
- TBD
Will follow a common airframe standard where possible, then be held.
- Wire specification
- TBD
- TBD
Gauge follows from continuous current; connector choice from airframe convention.
Applications
Where it fits.
High-performance FPV
Throttle response and thermal headroom under abuse.
Autonomous drones
Efficiency at the hover point sets endurance.
Aerial robotics
Platforms that manipulate, carry, or inspect.
Research platforms
Low-level control access and honest telemetry.
Building something that needs to move well?
Tell us what the machine has to do.