Release time:

2022-04-06

Car engine heat dissipation for many years has been using a brush fan, through the brush motor to drive the fan blades to rotate quickly to the radiator. Brushless fans were originally just Bosch. Large international companies such as Brose can provide leading technology. However, in recent years, brushless fans have become popular in China and have become a very popular and recognized technical product. The core of the brushless fan is the brushless motor. Compared with the traditional brush motor, the brushless motor has the advantages of small size, high efficiency and long service life. 1 small volume Optimize design and copper wire selection, improve slot full rate, strengthen heat dissipation, improve motor efficiency and reduce motor volume. A brush motor with a 200W fan is compared with a brushless motor. When the outer diameter remains unchanged, the height of the motor is reduced from 88.2mm to 68.5mm, which is more friendly to the space layout of the whole vehicle. The thinnest 400W brushless motor currently developed can reach 63mm. 2 High efficiency The motor is the largest part of the power consumption of the entire electromechanical system, so it is more important to improve its work efficiency. For a single motor, the efficiency of the brush is about 65%, while the efficiency of our 400W brushless motor can reach 85%, and the efficiency of the motor is 20% higher than that of the motor. 3 Long life The brushless fan motor saves friction between the carbon brush and the commutator. The motor only wears the bearing, and the service life is greatly improved. Under comprehensive working conditions, the service life of the motor can reach 30000 hours, which is about 3 times the service life of the brush motor. Note: Non-Hall sensor measurement, but use back EMF method to detect side position. Advantages of brushless fans. The motor starts smoothly, the starting current increases gradually, and there is no phenomenon such as combustion insurance caused by large current impact, reducing the power supply voltage, etc. Stepless speed regulation, wide speed range (currently the fan is controlled at 600~3000RPM), strong overload capacity; but the brush motor needs resistance speed regulation, which is less efficient. Using brush + PWM speed control module mode, the total cost advantage is not as good as brushless. The motor itself has no excitation loss and brush loss, high efficiency, good comprehensive power saving effect, power saving up to 15%, and comprehensive working life of 30000 hours. PWM communication, with stall, overcurrent, overvoltage, undervoltage and other protection functions and fault feedback, can also use LIN communication to meet the various needs of customers. Lightweight design, selection of more efficient and lightweight raw materials, simplify the design structure. For example, the brushless fan adopts a spherical design with a large concave-convex structure. The lightest 400W fan assembly weighs only 3KG. No carbon brush, no spark, motor and controller integrated structure, better EMC performance, conduction disturbance, radiation disturbance up to level 3. From the patch to the stator, the rotor is self-made and has complete process capability. From product structure design, electromagnetic design, structure and performance simulation, vibration analysis, strength analysis, product verification, testing, EMC testing, noise testing, air volume testing, etc.; It can realize the LIN burning of the brushless fan, and can be quickly customized and developed according to customer requirements to provide customers with a complete solution.