In order to solve this problem, several programs have been considered, such as variable pole motors, cascade speed regulation, and no direction adjuster motors. Can not be applied in the Hongmiao mine fan, for this reason, we consider the basic method of thyristor frequency conversion speed regulation according to the technical information provided by relevant parties to realize the technical transformation of the main ventilator of the inclined temple in Hongmiao Coal Mine. Preliminary analysis of variable frequency speed regulation The speed of the motor is n = the number of pole pairs of the p motor; the slip of the motor; the frequency of the power supply. For the moving motor, p and s are constant. It can be seen from the above equation that the synchronous speed of the motor can be smoothly changed if the frequency f of the stator power supply can be uniformly changed. The frequency conversion speed regulation can be divided into voltage, current and pulse modulation type. The basic principle is to use the rectifier to convert the 50-cycle AC power into DC, and then invert the DC to AC of different frequencies to achieve the purpose of adjusting the motor speed. Up to now, the domestic frequency control principle has been developed into a voltage and current double closed loop, frequency open loop analog digital hybrid control system and a new transistor trigger, frequency control unit, and has excellent dynamic performance. According to the analysis, the advantage of the variable frequency speed control method is that it can be used in the squirrel cage motor to achieve stepless speed regulation and high efficiency. The disadvantage is that the device is relatively complicated, and the current cost is still high, and the repairman is required to have a certain technical level. Power saving after frequency conversion and speed regulation The electric energy absorbed by the motor for fan dragging from the power grid is determined by the change point of the HQ curve and the characteristic curve of the pipe network. The output power of the motor is the efficiency of the moving device in the P-out type; the fan efficiency; the unit conversion factor. If the method of adjusting the motor speed is used to change the air volume, the operating point of the fan will change from point A to point C. When the working point is point C, the power consumed is the right first item is the working power, and the second item is the fan. Loss of power. The analysis shows that the two different adjustment methods can meet the requirements of adjusting the air volume, but the power consumption value is not the same. The difference between the power consumption of the gate valve and the speed regulation is p=p. The speed control method can change the air volume to save electricity. If the frequency regulation is used, not only the gate valve loss can be saved, but also the power loss caused by the slip can be saved. According to the characteristics of the fan, it can be known that: (1) the air volume is proportional to the motor speed; (2) the head H is proportional to the square of the motor speed; (3) the required power is proportional to the cube of the motor speed. Truck Mounted Water Well Drilling Rig Truck Mounted Well Drilling Rigs,Truck Mounted Water Well Drill,Truck Mounted Water Well Drilling Rigs,Truck Mounted Well Drilling Rig Taian Longye Import And Export Trade Co.,ltd , https://www.longyedrillingrig.com