small size permanent magnet 3.7kg small size integrated starter-generator for drone

This technology may be adopted and demonstrate its advancement in the following special scenarios:

(1) Hybrid or Range-Extended Drones

Some long-endurance drones (e.g., reconnaissance, mapping, and logistics drones) adopt a "fuel engine + generator + battery" hybrid power system to address the limitations of pure electric battery range. In such systems, the "starter-generator (SG)" can serve as a critical component:

· Starting phase: Driving the fuel engine to reach its operating speed;

· Power generation phase: Generating electricity via the generator when the engine is running, which charges the battery or directly powers the drone;

· Emergency phase: Acting as an electric motor to temporarily drive the propeller if the engine fails, providing redundant power.
This design extends flight time and reduces emissions compared to pure fuel-powered drones. However, hybrid drones are still in the development stage, and related technologies—including the starter-generator—fall under cutting-edge applications.

(2) High-Reliability Special-Purpose Drones

In military, emergency rescue, and other scenarios, drones must operate in complex environments (e.g., electromagnetic interference, component failures). The integrated starter-generator, by reducing the number of independent components, enhances the system’s anti-interference capability and redundancy, making it a high-reliability technical direction.

(3) Emerging Technology Validation

In recent years, research institutions and enterprises (e.g., NASA, Boeing, and domestic aviation research institutes) have explored "distributed electric propulsion (DEP)" drones, where motors must simultaneously handle propulsion, energy recovery, and even starting functions. In these cutting-edge explorations, "integrated starting and power generation" is one of the key technologies, positioning it as a future technological reserve.

3. Is It Considered an "Advanced Technology"?

Assessing its advancement depends on the specific context:

· In pure electric drones: Since no fuel engine is required, this technology has no direct demand and is not mainstream;

· In hybrid or special-purpose drones: By addressing core issues like weight, efficiency, and reliability through integration, this technology qualifies as current cutting-edge or advanced (especially when compared to traditional discrete starter and generator solutions);

· From a technological trend perspective: As drones evolve toward longer endurance, higher reliability, and multi-mission capabilities, integrated power systems—including starter-generators—are a critical direction, making them forward-looking advanced technologies.

Paramters:

Weight of the rotor assembly: 1184g

Weight of the stator assembly: 1873g

total weight: 3757g

Max. torque: 24N.m can last 10 seconds