Industry News

Analysis of the Principle of Hollow Cup Motor


The structure of the Coreless motor breaks through the rotor structure of the traditional motor. It uses an iron-core rotor, also called a coreless rotor.

This new rotor structure completely eliminates the electrical energy loss caused by the eddy current formed in the iron core. At the same time, its weight and rotational inertia are greatly reduced, thereby reducing the mechanical energy loss of the rotor itself.

Coreless motors have the following advantages:

1. Energy-saving characteristics: The energy conversion efficiency is very high, generally above 70%, and some products can reach above 90% (ordinary iron core motors are 15-50%);

2. Rapid activation and braking, extremely fast response: the mechanical time constant is less than 28 milliseconds, and some products can reach within 10 milliseconds. Under high-speed operation in the recommended operating area, the speed adjustment is sensitive;

3. Reliable operating stability: strong adaptive ability, its own speed fluctuation is very small and can be controlled within 2%;

4. Less electromagnetic interference: using high-quality brushes and commutator structures, the commutation sparks are small, and additional anti-interference devices can be eliminated;

5. High energy density: Compared with iron-core motors of the same power, its weight and volume are reduced by 1/3-1/2; corresponding parameters such as speed-voltage, speed-torque, and torque-current all show standard linearity relation.

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