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Cabinet centrifugal fan: what are the reasons for the unstable speed?
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Published time :2018-08-02
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Daily life diversified application of mechanical equipment used is a development trend of people's more critical situation, for everybody, daily life is extremely many machines use application is the application of the centrifugal fan, especially the application of the centrifugal fan such types of centrifugal fan machinery and equipment, the problem of application of centrifugal fan nowadays most people have is the centrifugal fan speed instability, lead to this kind of situation is what reason? 1, the generator rotor and motor commutator in the middle of the carbon powder or motor carbon brush itself is not good, Bingzhe targeted maintenance standards, the first accurate measurement of the variable resistance, resistance value with the adjustment of the regular change, confirmed that the resistor is good, and then accurate measurement of thyrator has not found a problem. Because the diode is a large flow of gold seal tube, one end of the screw screwed on the circuit board, the other end of the wire wrapped welding welding to the circuit board, removed from the circuit board, found that there is a loosening condition, and then accurately measured while shaking, confirm the diode on and off. 2, one of the four rectifier diodes is not very good 3, the variable resistance, the cabinet centrifugal fan due to the variable resistance installed on the operation panel, the application frequency is very high, for a long time, the situation of bad contact is very general. 4, thyristor problems are also many, generally through short circuit fault, lead, can not be opened or internal contact bad phenomenon.
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