The Reason For The Unstable Speed Of The Centrifugal Fan

The use and utilization of diversified industrial equipment in daily life is an important development trend for us. For us, the application and utilization of numerous equipment in daily life is the use and utilization of fans, and the most important thing is the use of centrifugal fans. Currently, the problem that most people face when using centrifugal fans is the unstable speed of the fan. What is the reason for this situation?
(1) One of the four rectifier diodes only has a problem
(2) There are defects such as carbon powder or carbon brushes between the motor rotor and the commutator. Following the repair principle of "easy first, difficult later", the first step is to measure the adjustable resistance. The resistance value changes regularly with adjustment, proving that the potentiometer is good. The second step is to measure the thyristor and no problems were found. As the second step is a high current metal sealed tube, one end is fastened to the circuit board with a screw, and the other end is soldered to the circuit board with wire. When removing it from the circuit board, it was found that there is looseness in the positive and negative directions. The second step is to measure and shake, confirming that the second step is good or bad.
(3) There are also many problems with thyristors, usually due to breakdown, short circuit, open circuit, inability to trigger, or poor internal contact.
(4) Adjustable resistor, cabinet centrifugal fan. Due to the installation of adjustable resistor on the control panel, the frequency of use is relatively high, and over time, poor contact is common.
If you find that the speed of the fan is unstable during operation, you can use the four points mentioned above as a direction for investigation, quickly identify the cause, and improve the conclusion rate of maintenance and repair. The diversity and diversity of fan equipment have always been a problem in the use of countless industrial equipment. We should clearly recognize the problem when using fan equipment, recognize the practicality and importance of diversified fan equipment. The advantage of a centrifugal fan is its convenience and ease of use, but it does not mean that it is easy to use and does not require recognition. The unstable running speed of a centrifugal fan is mainly caused by these factors. Understanding the equipment you are using is also important.