Lexus Radiator Fan Works:

- May 26, 2019-

Lexus radiator fan works:

According to Ampere's right-hand rule, the conductor passes current and a magnetic field is generated around it. If the conductor is placed in another fixed magnetic field, suction or repulsion will occur, causing the object to move. Inside the fan blade of the DC fan, a rubber magnet previously filled with magnetism is attached. Surrounding the silicon steel sheet, the shaft portion is wound with two sets of coils, and the Hall sensing assembly is used as a synchronous detecting device to control a group of circuits, which makes the two sets of coils wound around the shaft work in turn. The silicon steel sheet produces different magnetic poles, and the magnetic pole and the rubber magnet generate a repulsive force. When the repellent force is greater than the static friction of the fan, the blade naturally rotates. Since the Hall sensing component provides a synchronizing signal, the blade can continue to operate, and its direction of operation can be determined by Fleming's right-hand rule.

AC fan working principle:

The difference between an AC fan and a DC fan. The former power supply is AC, the power supply voltage will be positive and negative, unlike the DC fan power supply voltage is fixed, must rely on circuit control, so that the two sets of coils work in turn to produce different magnetic fields. The AC fan is fixed because the power frequency is fixed, so the magnetic pole change speed generated by the silicon steel sheet is determined by the power frequency. The higher the frequency, the faster the magnetic field switching speed is. The theoretical speed will be faster, just like the more the number of DC fans, the faster the speed. same. However, the frequency should not be too fast, too fast will cause activation difficulties.

Fourth, about noise:

Fan noise is measured in a non-reverberant room with background noise below 15 dBA. The fan to be tested is operated in free air, and a noise meter is disposed one meter away from the air inlet.

The noise value of the fan is usually plotted in the frequency band of the sound pressure level (SPL). The effect of changes in decibels (dBA) is shown by the following signs:

A> 3 dBA has almost no feeling

B> 5 dBA feels

C> 10 dBA feels twice loud

Noise level:

A> 0 ~ 20 dBA is very weak

B> 20 ~ 40 dBA weak

C> 40 ~ 60 dBA moderate

D> 60 ~ 80 dBA loud

E> 80 ~ 100 dBA

F> 100 ~ 140 dBA deafening

V. About the air volume:

Air volume unit (click: air volume wind pressure automatic conversion table)

CFS: Cubic Feet Per Second, cubic miles per second (ft3/s)

CFM: Cubic Feet Per Minute, cubic miles per minute (ft3/min)

CMS: Cubic Meter Per Second, cubic meters per second (m3/s)

CMM: Cubic Meter Per Minute, cubic meters per minute (m3/min)

CMH: Cubic Meter Peter Hour, cubic meters per hour (m3/h)

L/s: Liter Per Second, liters per second (L/s)

L/min: Liter Per Second, liters per minute (L/min)