This novel rotor structure completely eliminates energy loss caused by eddy currents in the iron core, while significantly reducing its weight and moment of inertia, thereby minimizing mechanical energy loss. The structural changes in the rotor greatly improve the motor 's operating characteristics, resulting not only in outstanding energy savings but, more importantly, in control and drive characteristics unattainable by iron-core motors.
Hollow cup motors mainly include:
1. Energy-saving characteristics: The energy conversion efficiency is very high, with a maximum efficiency of over 70%, and some products can reach over 90% (iron core motors are generally around 70%).
2. Control characteristics: Rapid start-up and braking, extremely fast response, mechanical time constant less than 28 milliseconds, some products can reach less than 10 milliseconds (iron core motors are generally above 100 milliseconds); in the recommended operating range, the speed can be easily and sensitively adjusted at high speed.
3. Drive characteristics: The operation is highly stable with minimal speed fluctuations; as a micro motor, its speed fluctuations can be easily controlled within 2%. Furthermore, the energy density of the hollow cup motor is significantly improved, and compared to an iron-core motor of the same power, its weight and volume are reduced by 1/3 to 1/2.
Hollow cup motors have the following advantages:
1. Maximum energy conversion efficiency (an indicator of its energy-saving characteristics): Its efficiency is 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 achieve less than 10 milliseconds. Speed adjustment is sensitive even at high speeds within the recommended operating range.
3. Reliable operational stability: Strong self-adaptive capability; its own speed fluctuation can be controlled within 2%.
4. Low electromagnetic interference: Utilizing high-quality brushes and commutator structure, commutation sparks are minimal, eliminating the need for additional anti-interference devices;
5. High energy density: Compared with iron-core motors of the same power, its weight and volume are reduced by 1/3 to 1/2; the corresponding parameters such as speed-voltage, speed-torque, and torque-current all show a standard linear relationship.
