"BMW" uses a double-circle graphic inside and outside, and the BMW trademark is marked above the double-circle. Historical background: BMW, whose full name is Bavaria Engine Works Co., Ltd. in Chinese, is a German luxury car brand. BMW's car series includes four models: I,

"BMW" uses a double circle inside and outside, and the BMW trademark is marked above the double circle.

Historical background:

BMW, whose full name is Bavaria Engine Works Co., Ltd. in Chinese, is a German luxury car brand. BMW's car series includes four models: I, ). BMW was founded in 1916. BMW's blue and white colors mark the colors of the flag of Bavaria, where BMW is headquartered. Over the past century, BMW has developed from an original aircraft engine factory to a corporate group that mainly produces luxury cars, produces world-renowned aircraft engines, off-road vehicles, and motorcycles, and ranks among the top automobile companies in the world. Its full name is Die-Bayer-Motor-Werke (Die-Bayer-Motor-Werke). Bavaria-Motor-Works).

Car logo introduction:

B.M.W means Bavarian Engine Factory. The color and combination of the logo come from the state emblem of Bavaria, where BMW is located.

Why does the BMW fan output stage detect that the load circuit is open?

The BMW fan output stage recognizes that the open circuit of the load circuit is caused by overheating damage to the coil and no 220v AC input, as follows:

Overheating damage to the coil:

When the fan is used for a long time, excessive dust deposits will cause the friction coefficient between the rotor and the bearing to increase, and the rotor will become clogged or even stuck, causing overheating and damage to the coil. Solution: After a power outage, open the back cover of the fan, drop a few drops of lubricating oil on the bearing sleeves at both ends of the rotor, and pull out the blades while dripping, until the fan blades are flexible, and the fan failure can be eliminated.

No 220v AC input:

There may be no 220v AC input or the coil is damaged. Solution: Cut off the power supply at this time, disconnect the two leads of the fan from the two overlapping points of the power cord, and leave them floating. Turn on the power and carefully measure both ends of the power cord with an electric pen. If one end is on but the other end is not, it means that the power supply line is normal and the fan coil unit may be damaged. If both ends of the pen don't light up or don't light up at all, it means there's something wrong with the power supply cable.

What is the BMW symbol? @2019