Advantages of Coreless Motors

The main advantages of coreless motors include high energy conversion efficiency, fast response, stable and reliable operation, low electromagnetic interference, high energy density, high power density, high utilization efficiency, no torque lag, no cogging effect, low starting torque, and high-speed coil design. Specifically:

High Energy Conversion Efficiency: The energy conversion efficiency of coreless motors is typically above 70%, with some products even reaching over 90%. This efficiency is far higher than that of ordinary iron-core motors, meaning that under the same energy input, coreless motors can output more useful work, reducing energy waste.

Fast Response Speed: Their mechanical time constant is less than 28 milliseconds, and some products can achieve less than 10 milliseconds. Under high-speed operation within the recommended operating range, coreless motors can quickly respond to speed adjustment commands, with very sensitive speed regulation. This rapid response capability makes coreless motors perform excellently in applications requiring frequent speed changes.

Stable and Reliable Operation: Coreless motors have strong self-adaptability, maintaining a stable operating state under different working conditions. Its own speed fluctuation can be controlled within 2%, ensuring the smoothness and reliability of motor operation.

Low Electromagnetic Interference: The use of high-quality brushes and commutator structure results in minimal commutation sparks, reducing electromagnetic interference. Therefore, the coreless motor eliminates the need for additional anti-interference devices, simplifying system design and reducing costs.

High Energy Density: Compared to iron-core motors of the same power, the coreless motor is 1/3 to 1/2 lighter and smaller. Simultaneously, its speed-voltage, speed-torque, and torque-current parameters exhibit standard linear relationships, ensuring stable performance output under various operating conditions.

High Power Density: The coreless rotor is lighter than a conventional iron-core rotor, eliminating eddy current and hysteresis losses. This design improves the efficiency of the micromotor, ensuring higher output torque and power, allowing the coreless motor to output greater power within a limited space.

High Efficiency: The coreless rotor has no eddy current or hysteresis losses, and its resistance is very low, reducing copper losses. These characteristics enable coreless motors to maintain high efficiency and reduce energy loss during operation.

**No Torque Hysteresis:** Because the coreless rotor eliminates hysteresis losses, coreless motors reduce speed and torque fluctuations. This lack of torque hysteresis makes the motor run more smoothly, improving overall system performance.

**No Cogging Effect:** Ordinary micromotors produce cogging effects due to the interaction between the slots and magnets, but coreless motors eliminate this effect. Therefore, neither cogging nor torque hysteresis exists, further improving the motor's operational smoothness and efficiency.

**Low Starting Torque:** Due to the absence of hysteresis losses and cogging effects, coreless motors have very low starting torque. Bearing load is typically the only obstacle, making startup easier and reducing energy consumption during startup.

**High-Speed ​​Coil Design:** Inductance is crucial for micromotors operating at high speeds. Low inductance results in low starting voltage. Increasing the number of poles and reducing the casing thickness helps reduce the weight of the micromotor while increasing power density. This high-speed coil design enables the coreless motor to maintain stable performance output even at high speeds.