The advantages of dc cooling fans in electronic industry have?
dc cooling fans advantages:
1, low cost of inverter, the inverter capacity low
continue to run when the current inverter, rating is rectangular wave peak, induction motor need to sine wave current, direct current motor need rectangular wave current. Inverter to continue running when the current rating of generally refers to the effective value of the sine wave. To adhere to the inverter's ability to control the motor current and dc voltage inverter and motor should be enough difference between induced electromotive force. In this case, if the assumption of dc motor and induction motor current peak is equal, is 33% higher than that of the former power output than the latter, that is to say, the same rectifier/inverter to drive more than 33% higher than that of induction motor output power brushless dc motor.
2, high power factor
the power factor is far higher than that of induction motor, because of the dc motor excitation magnetic field does not need power grid reactive current. Dc motor can be run on 1 power factor, it is highly advantageous to small power motor. Motor and induction motor has higher efficiency when compared with not only the rated load and power factor, and has more advantages in light load.
3, low loss, high efficiency,
eliminate the loss of induction motor excitation current, permanent magnet dc motor work in synchronous operation mode at the same time, because of the permanent magnet excitation. To eliminate the switch frequency of the induction motor rotor core loss. These two aspects makes the running efficiency of permanent magnet dc motor is far higher than that of induction motor, small capacity motor efficiency is more obvious.
4, speed control performance is good, simple control
dc fan speed regulation control is not only simple, compared with induction motor variable frequency speed regulation, and has better performance of speed adjustment.
these advantages and characteristics of dc cooling fans can be very good to use in its electronics industry, machinery and equipment, because of its small convenient wait for a reason and make its application more widely. Future cooling fan with the rapid development of electronic products, is sure to get more dominant position, become an integral part of electronic products, let's wait and see.