The coreless motor is a new type of motor with a unique structure. It is mainly composed of a stator and a rotor. Compared with traditional motors, the coreless motor has the advantages of small size, light weight and high efficiency. Due to its excellent performance, the coreless motor is widely used in various micro devices, such as toys, household appliances, robots, etc.
- Definition and structure
The coreless motor breaks through the stator-rotor structure of traditional motors in structure and adopts a coreless stator/rotor. Specifically, its armature winding is a coreless coil, which is similar to a water cup, hence the name “coreless motor”. This novel stator-rotor structure completely eliminates the power loss caused by the eddy current formed by the iron core, while greatly reducing the weight and moment of inertia of the motor, thereby reducing the mechanical energy loss of the stator/rotor itself.
- Classification and characteristics
The coreless motor can be divided into two categories: brushed coreless motor and brushless coreless motor. The main difference between the two is the working mode of the stator and rotor and whether there is a commutator. Brushless hollow cup motors have better performance in terms of speed, weight, power-to-volume ratio, etc., but the price is relatively high.
The main features of hollow cup motors include:
1) High integration: Due to the hollow structure, multiple mechanical components can be integrated together, which improves the compactness and reliability of the system.
2) High precision: The transmission link is reduced, which can improve the control accuracy and response speed of the system.
3) High flexibility: It can be directly connected to various transmission mechanisms and sensors and is suitable for a variety of applications.
4) Energy-saving characteristics: Due to the elimination of core eddy current loss, it has outstanding energy-saving characteristics.
5) Sensitive and convenient control characteristics: No hysteresis loss, no cogging effect, very low starting torque, easy to control.
6) Stable operation characteristics: The operation stability is very reliable, the speed fluctuation is very small, and as a micro motor, its speed fluctuation can be easily controlled within 2%.
- Application scenarios
The hollow cup motor has the characteristics of high sensitivity, stable operation, and strong controllability, which meets the stringent requirements of high-precision fields for electric drive. Therefore, it is mainly used in high-precision fields such as aerospace, medical equipment, industrial automation and robots. At the same time, hollow cup motors are gradually used in the civilian field, such as office automation, power tools, etc. Specifically, hollow cup motors are suitable for the following scenarios:
1) Follow-up systems that require fast response, such as fast adjustment of the flight direction of missiles, follow-up control of high-magnification optical drives, fast automatic focusing, high-sensitivity recording and detection equipment, industrial robots, bionic prostheses, etc.
2) Products that require stable and long-lasting dragging of driving components, such as various portable instruments, personal equipment, instruments and equipment for field operations, electric vehicles, etc.
3) Various aircraft, including aviation, aerospace, and aircraft models, can minimize the weight of aircraft by utilizing the advantages of hollow cup motors with light weight, small size, and low energy consumption.
After exploring the unique structure, excellent performance, and wide range of applications of hollow cup motors, it is not difficult to find that this micro servo DC motor is leading the new trend of precision drive technology with its incomparable advantages. From high-precision applications in aerospace to convenient equipment in daily life, hollow cup motors have become the indispensable “heart” of many high-tech products with their light weight, high efficiency, and energy saving.
If you want to know more about “brushless motor”, please contact online customer service. X-TEAM brushless motor provides OEM and ODM services for a long time to meet the different needs of different customers.