Difficulties in Transforming Traditional Knocking Machine Frequency Converters< br />
1. The kowtow machine generates electricity twice in a working cycle, especially when the counterweight is unbalanced; Pump up voltage” Very high. The problem cannot be completely solved by increasing the electrolytic capacitor on the DC side of the converter and reducing the brake resistance value. And with the change of oil layer,“ Pump up voltage” It's also changing< br />
2. The starting of the kowtow machine requires a large starting torque. If the parameters of the frequency converter are not set properly, it can easily cause overcurrent or failure to start< br />
3. Previous frequency conversion energy-saving transformation design schemes rarely considered changes in oil level and concentration of oil wells. In terms of increasing production, the effect is not satisfactory.
Solution

1. Adopting variable frequency speed regulation technology to match the motor speed with the load of the kowtow machine< br data-filtered="filtered" />
2. Dynamically adjust the stroke frequency of the kowtow machine. As the oil well is pumped from shallow to deep, the oil volume gradually decreases, resulting in insufficient pump filling and a decrease in pump efficiency. When the oil well's oil supply capacity is less than the displacement of the oil pump, it causes pump evacuation and liquid hammer. Reducing frequency, decreasing motor speed, and improving filling level not only saves energy but also increases crude oil production< br data-filtered="filtered" />
3. Dynamically adjust the speed of the up and down strokes of the kowtow machine, reduce the down stroke speed appropriately, increase the filling degree in the pump, and increase the up stroke speed appropriately to reduce the leakage coefficient during lifting, so that the kowtow machine operates in a ****** operating state, effectively improving the crude oil production per unit time< br data-filtered="filtered" />
4. High starting torque, low load during operation, and high impact current. To fundamentally solve the problem, increase the number of motor poles or the speed ratio of the gearbox to increase the output torque. The frequency converter operates normally at 80.00~90.00Hz. This is also beneficial for reducing the energy in the power generation state, reducing&# quo; Pump up voltage< br data-filtered="filtered" />
5. Treatment of renewable energy. Increase the capacity of the filter capacitor on the DC side of the frequency converter; Reduce the braking resistance value, improve the power consumption capacity of the braking system, or directly use feedback braking to reduce energy loss; When generating electricity, the frequency increases< br data-filtered="filtered" />
6. Anti pumping, dynamically adjusting the stroke frequency and up and down stroke speed of the kowtow machine. Set the standard output power value of the motor, detect the motor output power in real-time, control the motor speed, and accelerate if it exceeds the standard value. On the contrary, decelerate to achieve closed-loop control.