Drone Motor

Ⅰ.Basic situation of UAV motor market

In recent years, the global drone market has entered a phase of rapid growth as the low-altitude economy thrives. Drones are increasingly adopted across industries, particularly in logistics delivery, photography, agricultural pest control, and inspection monitoring. As the core power unit of drones, drone motors have seen growing market attention alongside industry expansion.

multirotor UAV

Ⅱ.Market demand or pain points

When operating in complex natural environments, drones must not only maintain stable performance but also ensure long-lasting endurance and operational lifespan. This imposes stringent demands on the performance and reliability of their core component—the motor. However, current drone motors in the market generally face the following issues when addressing these challenges:

1. Heavy weight: Current motors on the market struggle to balance power output with lightweight requirements, resulting in excessive weight that compromises drones' payload capacity, flight endurance, and maneuverability.

2. Poor heat dissipation: Many motors on the market use enclosed structures with low cooling efficiency. When operating under continuous high loads, the winding temperature exceeds the limit, which may cause irreversible demagnetization of the motor's magnets and accelerate insulation layer aging, increasing coil short-circuit risks. This not only reduces the drone's lifespan but also raises operational risks.

3. Excessive vibration: When some motors operate at high speed, their vibration may exceed the safety threshold, potentially causing the drone to deviate from its hovering position beyond the limit and leading to a sharp decline in payload capacity.

Ⅲ.Li Hui provides solutions to meet the market demand, which can be achieved technically.

To address the pain points of motors in the current market, Lihui has developed a new solution by optimizing both the magnetic circuit design and structural design of motors.

1. The motor employs a brushless DC motor, with optimized magnetic circuit and upgraded materials. Its main frame is constructed from aviation-grade hard aluminum, achieving both weight reduction and mechanical strength.

2. This solution addresses electromagnetic vibration by optimizing the motor's slot-pole fit and pole arc coefficient to reduce cogging torque, thereby minimizing electromagnetic vibrations. For mechanical vibration, high-precision dynamic balancing equipment is employed to lower the motor's dynamic balance deviation, reducing mechanical vibrations. By tackling both electromagnetic and mechanical vibrations simultaneously, the system fundamentally improves motor vibration performance, ultimately enhancing the stability of the drone.

3. To solve the heat dissipation problem, the scheme designs an air inlet on the outer circle of the rotor and adds several ribs at the corresponding position inside the rotor. The heat generated by the stator is carried away by the rotation of the rotor, which realizes the high efficiency self-heat dissipation of the motor, improves the life of the UAV and reduces the risk of use.

                                                                            Outside view of the motor

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Note:‌ This article is contributed by Research and Development Department