Air model hollow cup motor is a kind of DC motor with hollow cup winding. The winding coil is wound on the hollow cup made of insulating material. It has the advantages of compact structure, light weight and high efficiency.

The hollow cup motor has many remarkable technical characteristics in operation, which make it widely used in miniature equipment such as model aircraft. The following are the main technical characteristics of the hollow cup motor:

First, high efficiency

High energy conversion efficiency: The hollow cup motor eliminates the loss caused by the magnetic resistance moment and eddy current effect generated by the iron core, so its energy conversion efficiency is very high. According to relevant data, the high efficiency of the hollow cup motor can reach 90%, which is much higher than the traditional brush DC motor of about 50%. This high performance characteristic allows the model aircraft to use electrical energy more effectively during flight and extend flight time.

Two, high speed

Fast response and high-speed operation: the rotor inertia of the hollow cup motor is very small, the response time is very fast, and the mechanical time constant is generally within 28 milliseconds, and some products are even less than 10 milliseconds. This fast response characteristic enables the model aircraft to respond quickly when it needs to change its flight attitude quickly or perform difficult maneuverings. At the same time, the high speed of the hollow cup motor can reach about 10000rpm, which is much higher than the high speed of the traditional brush DC motor (generally below 5000rpm), providing more powerful power support for the aircraft model.

Third, lightweight and compact

Small size, light weight: the hollow cup motor uses a coreless rotor structure, making the motor as a whole more lightweight and compact. Compared with the same power of the core motor, the weight and volume of the hollow cup motor can be reduced by 1/3 to 1/2. This lightweight and compact design makes it easier to meet weight and volume constraints during the design and manufacturing process, while also helping to improve the aircraft's flight performance.

Fourth, stability and reliability

Stable operation: The hollow cup motor has no cogging effect, the overload capacity is higher than the brush DC motor, and the smaller torque ripple makes it stable and reliable operation. The speed fluctuation is small and easy to control, generally can be controlled within 2%. This stability is crucial for model aircraft, helping to ensure smoothness and safety during flight.

Long life: The number of reversing pieces of the hollow cup motor makes the current fluctuation and the inductance of the motor smaller when reversing, greatly reducing the electrical corrosion of the reversing system during the reversing process, so as to have a longer life. According to the relevant data, the life expectancy of the hollow cup motor is usually between 1000 and 3000 hours, far more than the life of the traditional brush DC motor (generally only a few hundred hours).

5. Excellent control characteristics

Flexible control: The hollow cup motor has sensitive and convenient control characteristics. The speed can be easily adjusted sensitively at high speed within the recommended operating area. This excellent control characteristic enables the aircraft model to control the flight attitude and speed more precisely during the flight, improving the flight performance and stability.