Wind from the centrifuge is a once-speed motor, the pace of the conduction angle adjustable resistance to change by the SCR system, followed by a thyristor controlled rectifier reach the voltage across the motor, in order to control the speed of purpose The motor speed instability, analysis from the principle, the following four cases are possible. (1) a four rectifier diodes only problem (2) between the rotor and commutator brushes itself toner or bad, etc., in line with the difficult easy after the first repair principle, first measure the adjustable resistance, resistance value with changes in regulation and regular centrifugal fan, proved potentiometer is good, and then measuring the SCR also found no problem, since the high-current diode is sealed gold tube, one end of the screw fastening on the circuit board, the other end with wire soldered to the board, when removed from the board, find the positive and negative loosening, and then measuring the side while shaking, confirmed that the diode good times and bad. (3) SCR also a lot of problems, usually breakdown short circuit, open circuit, can trigger or internal poor contact. (4) adjustable resistance, the situation is due to the adjustable resistor cabinet centrifugal fan mounted on the control panel, using very high frequency, long time, very ordinary poor contact. During operation, if you found the fan speed instability phenomenon occurs, it may point to the above-mentioned four directions as the investigation Hunan domestic centrifugal fan, quickly identify the causes and improve maintenance efficiency. Familiar with the working principle of centrifugal fans who are aware, for centrifugal fan, the fan is actually a high-energy-consuming equipment, from some comparative data to analyze, it consumes power resources in the occupied stone processing specific gravity is larger. In our country and the whole world Henan centrifugal fan wholesale energy shortage is already an undeniable fact, the face of the growing shortage of energy, as well as high-yield, efficient face of the promotion and application of energy saving has become a common concern of stone manufacturer Beijing centrifugal fan problem specification, there are many stone production enterprises to reduce power consumption of the fan as the current important work. Reduce fan power consumption, in addition to improving the efficiency of the fan itself beyond reasonable way to adjust the fan selection is the most important. Because the load of stone production process requirements will change with those changes, most fans will need frequent flow adjustment according to the host load. Shanxi pressure centrifugal blower centrifugal fan _ _ nagorye Blower Works by Shanxi nagorye blower limited liability company. Shanxi nagorye Blower Co., Ltd. (www.sxgfj.cn) (www.sxfjgs.com) strong, credible, Shanxi Xinzhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead nagorye blower and you hand into the brilliant, for a better future!