Industry News

What Are The Advantages Of Coreless Motors?

2023-10-13

Coreless motors are widely used in smart home drives, automobile drives, medical equipment, robots, industrial automation equipment, communication equipment, massage and health care equipment and other fields. It has been favored by many customers and is cost-effective. What are the advantages of hollow cups?


1. Operational stability and reliability

Coreless motors have strong adaptive capabilities and can control speed fluctuations as low as 2%. This means the motor can maintain a constant and accurate rotational speed without excessive noise or vibration. By comparison, iron core motors experience speed variations of about 5-10%, which affects their performance and service life.


2. Maximum energy conversion efficiency

One of the most significant advantages of coreless motors is their excellent energy conversion efficiency, with coreless motors typically being 70% efficient and some motor efficiency ratings can be as high as 90%, well above the 15-50% range of iron core motors. This means lower power consumption, longer battery life and lower operating costs.


3. High energy density

Another advantage of coreless motors is their compact and lightweight design, resulting in high energy density. This means that for the same power output, coreless motors are up to 50% smaller and lighter than iron core motors. In addition, a linear relationship between speed and voltage, torque, or current allows for more precise control of the motor's performance, which is critical for applications requiring fast starts and stops, high acceleration, or tight synchronization.


4. Fast response and small torque lag

The mechanical time constant of coreless motors is less than 28 milliseconds, and some coreless motors can even achieve time constants as low as 10 milliseconds, making them ideal for applications requiring high-speed operation and accuracy. Unlike iron-core motors, which experience torque lag due to hysteresis and eddy current losses in the silicon steel sheets, coreless motors have no such lag and run smoothly and quietly.


5. Less electromagnetic interference

Due to their brush and commutator construction, coreless motors produce less electromagnetic interference (EMI) than iron-core motors. The absence of commutation sparks and cogging eliminates the need for additional EMI suppression devices, simplifying motor design and assembly.


6. Small rotation fluctuations

Ironless motors are more stable and more precise than iron-core motors because their iron cores have no potential mechanical losses. This means that coreless motors fluctuate much less frequently and over time, making them ideal for precision appliances that require precise and reliable performance. Additionally, the absence of an iron core allows for more flexible and creative designs that can adapt to different shapes, sizes and functions.


7. Good stability:

Coreless motor production technology is relatively mature in China. Each manufacturer has supporting R&D, testing, semi-automatic and automated production experience to meet general application requirements, and the products have good stability.