Difference and introduction of AC fan DC fan EC fan
Introduction to AC/DC/EC fans
AC fans, DC fans and EC fans are categorized based on their power type and motor type, respectively.
AC (Alternating Current) fans are fans that are driven by an alternating current (AC) power source, and their motors are usually single-phase or three-phase asynchronous motors. Due to the relatively stable voltage and frequency of the AC power supply, the output power and mechanical efficiency of AC fans are very high, while their torque stability is good and reliable when the speed is stable and the load varies.AC fans are used in industrial ventilation, cooling, HVAC, agriculture, transportation and other fields.
Features: AC fans, with simple structure and low manufacturing cost, are widely used. Compared with DC fans, it is easy to maintain and simple to control, the disadvantage is that it uses more electricity and makes more noise.
DC (Direct Current) fans refer to fans that are driven using a DC power supply, and their motors are usually brushed or brushless DC motors. The voltage and current of DC power supplies fluctuate widely, so DC fans have relatively low output power and mechanical efficiency, but can achieve higher speeds and smaller sizes. At the same time, DC fans have excellent torque performance and control performance at low speeds and low load operation, and are used in computers, communication equipment, power tools and small home appliances.
Characteristics: DC fan, with good starting characteristics and speed regulation characteristics, the use of DC relative to AC is more energy efficient and environmentally friendly, the disadvantage is that it requires a controller for its output of DC power, electromagnetic radiation.
EC (Electrical Commutation) fan refers to the use of electronic controller-driven permanent magnet synchronous motor fan, which realizes the small size and high efficiency of the DC fan, and has the high reliability and better control performance of the AC fan. EC fan through the electronic controller to achieve precise control of speed, air volume and pressure and other parameters, can effectively reduce energy consumption and noise and improve the efficiency and life of the fan. EC fans are currently used in air treatment, ventilation, refrigeration, freezing equipment, fresh air systems and other fields.
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Characteristics: EC fans, with high intelligence, high energy saving, high efficiency, long life, low vibration and low noise, have obvious advantages in power saving and noise reduction. The disadvantage is that the manufacturing cost is higher.
EC AC Fan Efficiency Comparison Chart
EC fans have the following advantages over AC fans:
1. Being able to realize control modes such as constant voltage, constant current and constant power, which makes the mechanical load small and the working efficiency high.
2. Able to adjust the power supply output voltage in real time according to the load change, and automatically adjust the fan speed to maintain stable operation when the power supply voltage fluctuates.
3. Small start-up torque, short start-up time, fast transient response, able to quickly change the wind volume response.
4. In long-term operation, EC fans consume less energy than AC fans and have lower maintenance costs.
5. EC fans do not require the use of additional electrical components such as frequency converters and capacitors, making the system simpler, more reliable, with less noise and longer life.
Comparison of DC fans and EC fans:
DC fan and EC fan are both DC cooling fans, but there are some differences between them, a simple summary: DC input is direct current, EC can input AC power, it is to convert AC to DC.
