Coreless motors enable smaller, more efficient, and quieter fans
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Before understanding the role of coreless motors in fans, let's first understand the working principle of fans. Fans use motors to drive blades to rotate, and use the rotation of blades to accelerate and blow out air, thereby achieving the purpose of air circulation, cooling or ventilation. The specific process is as follows:
Suction phase: As the fan blades rotate, air is drawn into the fan's air inlet, which is usually designed as a larger opening to allow a large amount of air to flow in.
Acceleration stage: The inhaled air enters the working area of the fan blades. As the blades rotate, the air is accelerated and pushed, and the speed and pressure of the air gradually increase.
Exhaust stage: The accelerated air is discharged through the fan outlet, forming a continuous airflow.
This working principle makes fans widely used in homes, offices, industries and other fields to help improve air flow, remove heat and maintain a comfortable environment.
Application of Coreless Motor in Fan
As fans have increasingly higher requirements for miniaturization, high efficiency, and low noise, brushless coreless motors have gradually become an ideal choice, especially in fan products that have high requirements for space and noise control. Brushless coreless motors are widely used in portable fans, smart fans, and high-efficiency fans. With their compact size, excellent power density, and low noise characteristics, they have become an indispensable core component in modern fan design. With the development of technology, the manufacturing technology of coreless motors has become more mature, and the production cost has gradually decreased, making their application in high-end fans and home appliances more popular.
So, compared with traditional asynchronous motors, BLDC motors and stepper motors, what are their respective advantages and disadvantages?
1. Coreless motor vs. asynchronous motor
Advantages:
Miniaturization and high power density: Although asynchronous motors are simple in structure, low in cost, and very durable, they are usually large in size and have low power density. The hollow structure design of the coreless motor enables it to provide higher power output in the same volume, making it suitable for use in space-constrained equipment.
Efficiency and noise: Asynchronous motors are less efficient at higher loads and are noisier when running, especially at higher speeds. The high efficiency and low noise characteristics of coreless motors make them perform better in applications that require low noise and high efficiency, such as household appliances, office fans, etc.
shortcoming:
Higher cost: Compared with asynchronous motors, the current coreless motor has a higher manufacturing cost and may not be suitable for applications with a lower budget.
2. Coreless Motor vs. BLDC Motor
Advantages:
Small size and light weight: Although BLDC motors have higher efficiency and stable operation, coreless motors usually have advantages in size and weight. The lightweight design and high power density of coreless motors make them particularly good in compact devices, suitable for fans with strict space requirements.
Noise control: Although BLDC motors have lower noise, the special design of the coreless motor further reduces operating noise, making it suitable for environments with extremely high noise requirements, such as high-end personal fans, air purifiers, etc.
shortcoming:
Complexity of control system: The control system of BLDC motor is relatively mature and low in cost, while the control system of coreless motor is relatively complex, with high manufacturing and maintenance costs.
3. Coreless Motor vs. Stepper Motor
Advantages:
High efficiency and low noise: Stepper motors have precise angle control capabilities and are suitable for applications that require precise angles and positions. However, stepper motors are relatively lacking in efficiency and noise control, especially in fan applications that require high efficiency and low noise, where the advantages of coreless motors are more prominent.
Volume and power density: The coreless motor has a small size and high power density due to its hollow rotor design. It can provide greater power output in a compact design space and is suitable for applications with limited volume such as fans.
shortcoming:
Precision control: Stepper motors have unique advantages in precise position control and are suitable for applications that require precise rotation. Although coreless motors can provide relatively precise speed control, they may not be as good as stepper motors in position control and accuracy.
Through understanding, VSD believes that in the future, with the continuous advancement of technology, coreless motors will become an ideal choice in the fan field, especially in high-end, intelligent, and portable fans, due to their advantages such as high efficiency, low noise, and compact design. Compared with other motors, coreless motors will show their unique advantages in specific application scenarios.
VSD Coreless Motor Product Recommendations
As the requirements for miniaturization, high efficiency and low noise of fan products are increasing, the coreless motor series launched by VSD have shown excellent performance in terms of volume, power density and noise control. The following are some typical models of VSD coreless motors, which are particularly suitable for the design requirements of portable fans, smart fans and high-efficiency energy-saving fans.
VEC-1015 is VSD's compact coreless motor with a small diameter and excellent power density, which is particularly suitable for applications with strict space requirements. Its operating voltage range is from 4.2V to 16V, and it provides two specifications to meet different needs:
Specification 1 (4.2V operating voltage): no-load speed up to 25,398 rpm, no-load current is only 0.045A, the speed reaches 20,367 rpm at maximum efficiency, the output power can reach 0.462W, the starting torque is 1.093mN.m, and the starting current is 0.734A. This specification is suitable for low-power, small equipment.
Specification 2 (12V rated voltage): no-load speed is 75,656 rpm, no-load current is 0.04A, speed at maximum efficiency is 65,977 rpm, output power is 2.877W, starting torque reaches 3.255mN.m, starting current is 2.091A, suitable for applications requiring higher power output.
This type of motor has significant advantages in portable fans and smart home appliances, especially in terms of noise control and miniaturization.
The VEC-1218 series coreless motor provides higher power output and is suitable for medium to large fans, especially in fan designs that require large torque and high efficiency. This motor provides two working specifications to meet different voltage requirements:
Specification 1 (12V rated voltage): The no-load speed is 30,080 rpm, the speed reaches 24,010 rpm at maximum efficiency, the output power is 3.453W, and the starting torque is 6.807mN.m, which is suitable for equipment with higher power requirements.
Specification 2 (24V rated voltage): The no-load speed of this specification can reach 62,215 rpm, the no-load current is 0.1A, the speed at maximum efficiency is 52,777 rpm, the output power is 11.579W, and the starting torque is as high as 13.811mN.m. It is suitable for large and high-efficiency fan products.
The superior performance of VEC-1218 makes it an ideal choice for high-efficiency fans and smart home devices, effectively improving product performance and user experience.
VEC-1336 is VSD's high-efficiency, high-power coreless motor, which is particularly suitable for fan products that require high torque and high power output. Its excellent performance makes it widely used in industrial equipment or large intelligent fans:
Specifications (12V rated voltage): No-load speed is 42,500 rpm, speed at maximum efficiency is 37,204 rpm, output power is 17.621W, starting torque reaches 36.292mN.m, starting current is 14.804A. This specification provides extremely powerful power output and is suitable for high-power applications.
The high-efficiency design of VEC-1336 ensures continuous and stable operation of the product, especially in industrial-grade fans with high torque and high efficiency requirements.
Why choose VSD
Direct supply from manufacturers, eliminating middlemen: VSD provides customers with direct supply, eliminating middlemen and ensuring you a more competitive price.
Focus on customized design: VSD focuses on customized design and can flexibly adjust according to the specific needs of customers, providing comprehensive OEM and ODM services to fully meet diverse market needs.
Professional R&D team: VSD has many experienced R&D engineers who can provide customers with professional advice and solutions. Our independent R&D team is committed to meeting customers' customized needs and ensuring that each project can accurately meet customers' requirements.
