This is a very detailed and professional technical parameter comparison analysis of DC FFU (EC FFU) and AC FFU (AC FFU) fan filtration units. This comparison will comprehensively analyze the differences between the core motor characteristics and actual application effects.
Technical parameters of DC FFU (EC FFU) vs AC FFU (AC FFU)
| Technical parameters/characteristics | DC FFU (EC FFU) | AC FFU (AC FFU) | Comparative analysis and impact explanation |
| Core motor technology | Electronic commutation DC brushless motor | AC induction motor | Fundamental difference: DC motors use permanent magnet rotors and intelligent electronic control systems, laying the foundation for high efficiency and controllability. Communication motor technology is traditional and simple. |
| Speed regulation method and accuracy | Stepless speed regulation. Accurate and smooth continuous adjustment of 0-100% speed by changing voltage or PWM signal | Graded speed regulation. Usually, the input voltage is changed through a tap transformer to achieve rough wind speed adjustment of 3-5 levels | Core advantage: DC FFU can achieve linear and precise control of air volume, making it easy to maintain constant air volume or static pressure. Communication FFU has a narrow adjustment range, low accuracy, and slow response |
| Control and Intelligence | Built in intelligent controller, supports industrial bus protocols such as RS-485, Modbus, BACnet, etc., easily integrates with group control systems | Usually there is no intelligent control unit, making communication difficult. Additional expensive frequency converters are required to achieve limited control, and group control implementation is complex and costly. | Application watershed: DC FFU is the foundation for achieving cleanroom intelligence, remote monitoring, data acquisition, and energy efficiency management. FFU communication is basically unable to meet the requirements of modern intelligent clean rooms. |
| Energy consumption and efficiency | Extremely high (efficiency>70%, even higher under partial load). The motor itself has high efficiency, and the efficiency attenuation is very small under partial load | Low efficiency (usually<50%). The motor efficiency is low, and the efficiency drops sharply at non rated speeds (such as during voltage regulation and reduction operation) | Economic core: DC FFU saves 30% -50% more energy than AC FFU in actual operation (usually not at full load). Long term operation results in significant electricity cost savings |
| Wind speed/air volume stability | Extremely high. Equipped with soft start/soft stop function, precise speed control, unaffected by grid voltage fluctuations, and able to maintain a constant air volume | Poor. Wind speed is prone to drift due to factors such as voltage fluctuations in the power grid and increased resistance of filter materials, making it difficult to maintain long-term stability | Performance key: The DC FFU can always maintain the set wind speed/volume, ensuring uniform and stable airflow organization in the clean room, which is crucial for maintaining cleanliness and pressure gradient. |
| noise level | Low (usually<50 dB (A)). Brushless motors run smoothly, without electromagnetic noise, and often operate at medium and low speeds with less noise. | High (usually>55 dB (A)). The AC motor has a large start stop impact, significant electromagnetic noise and mechanical vibration, and high gear noise | DC FFU provides a quieter working environment for high-end cleanrooms such as microelectronics and optics laboratories, which is beneficial for process and personnel comfort |
| Vibration and heat generation | Low vibration, low heat generation. Smooth operation, high efficiency, most of the electrical energy is converted into mechanical energy, with low heat generation | Vibration and heating are obvious. The operation vibration is relatively large, the efficiency is low, and a large amount of electrical energy is converted into heat energy, which increases the cooling load of the air conditioning system | The low heat generation of DC FFU indirectly reduces the cooling energy consumption of the air conditioning system, achieving secondary energy saving. Low vibration is beneficial for protecting precision process equipment. |
| Maintenance cost and lifespan | Low maintenance, long lifespan (motor lifespan usually>50000 hours). Wear free parts such as carbon brushes, basically maintenance free | High maintenance. The carbon brush of the AC motor needs to be replaced regularly, and the bearings are vulnerable, resulting in high maintenance workload and spare parts costs | DC FFU reduces downtime and labor costs, and improves the overall utilization efficiency (OEE) and reliability of production equipment |