Compared with AC FFU, what advantages does DC FFU have?

Compared with AC FFUs, DC FFUs have the following advantages:
Precise speed regulation: The DC FFU adopts pulse width modulation (PWM) technology, which can continuously and precisely adjust the motor speed and precisely control the air volume according to actual needs. However, AC FFUS usually can only achieve a limited number of speed adjustments by changing the voltage of the motor windings, and the speed regulation accuracy is relatively low.
High efficiency and energy saving: When operating at partial load, the DC FFU can precisely adjust the speed according to the actual working conditions, reducing energy consumption. Generally speaking, compared with AC FFU, DC FFU can save energy by about 30% to 50%. In systems that operate for a long time and have large variations in air volume demand, the energy-saving effect is more prominent. There is considerable energy loss when the AC FFU is speed-regulating, and its energy-saving performance is relatively poor.
Good starting performance: The starting current of the DC FFU is small, causing little impact on the power grid and enabling smooth starting. The starting current of the AC FFU is relatively large, which may cause a certain impact on the power grid, especially when large equipment starts up simultaneously, it may affect the stability of the power grid.
Low operating noise: The operating noise of the DC FFU is relatively low. This is because the DC motor adopts electronic speed regulation, which runs more smoothly, and both mechanical vibration and electromagnetic noise are relatively low. Due to the motor structure and speed regulation method of AC FFUs, the noise during operation is usually louder than that of DC FFUS.
Long service life: DC motors use electronic speed regulation, with smooth starting and operating currents, causing less impact on motor components. Moreover, their design and manufacturing processes are relatively advanced. Therefore, the service life of DC FFUs is generally longer, reaching 10 to 15 years or even longer under normal use. The motor windings bearings and other components of the AC FFU are prone to large current impacts during startup and operation, resulting in relatively greater wear and affecting their service life.
High power factor: The power factor of DC FFUs is relatively high, generally above 0.9, while that of AC FFUS is usually around 0.7 to 0.8. A high power factor means that the DC FFU has a smaller reactive power demand for the power grid at the same power, which can effectively reduce the load of the power grid and improve the efficiency of the power grid.