​The voltage used in electronic products is divided into direct current (DC) and alternating current (AC).

Our usual household appliances, such as electric lights, air conditioners, refrigerators, etc., are AC power supply, while we use DC power supply with batteries (such as mobile phones, flashlights, clocks, etc.).

In principle, the efficiency of DC cooling fan is higher than that of AC cooling fan, but DC voltage transformation is difficult and AC voltage transformation is easy. EC fan was born to take the above two advantages. EC cooling fan can accept AC input and adapt to a wide voltage range. Generally, it can adapt to the voltage of 100-240V. The motor driving part uses the principle of DC motor, which improves the energy efficiency of the motor.

EC full name: Electrical Commutation

Advantages: wide input voltage range and high energy efficiency;

Disadvantages: complex process, high cost and high failure rate.