The energy feedback supplier of the frequency converter reminds you that when choosing a frequency converter for speed regulation or energy saving, you should follow the following 10 principles as a prerequisite for deciding on the solution. Local electricity prices are high, and when the same amount of electricity is saved, the economic benefits are greater, which is also a necessary consideration.
1) There are certain conditions for a frequency converter to save electricity. By appropriately changing the operating parameters without affecting the use, the energy consumed by unreasonable operating parameters can be saved, and the transition from general operation to economic operation can be achieved.
2) To save energy, it is necessary to reduce the frequency. The greater the decrease, the more energy can be saved. Without reducing the frequency, the frequency converter cannot save electricity in principle.
3) Related to the load rate of the electric motor. When the load rate is between 10% and 90%, the maximum power saving rate is about 8% to 10%, and the corresponding power saving rate is higher when the load rate is low. But the reactive power saving rate is about 40% to 50%, which does not include electricity bills.
4) It is related to the rationality of the parameter values of the original operating conditions. For example, it is related to the adjustable values such as pressure, flow rate, and speed. If the adjustable value is large, the energy-saving rate will be high, otherwise the opposite is true.
5) Related to the original adjustment method used. Using imported or exported valves to adjust operating parameters is not economical. If it is changed to frequency converter speed regulation, it is economically reasonable. After using a frequency converter for speed regulation, it can save up to 20% to 30% more electricity than adjusting the operation method manually with valves.
6) Related to the originally adopted speed regulation method. For example, originally using a slip motor for speed regulation had low efficiency, especially at medium and low speeds where the efficiency was only below 50%, which was not economical. After switching to a frequency converter for speed regulation, this part of the electrical energy was saved. At present, most industries such as light industry, textile, papermaking, printing and dyeing, plastics, rubber, etc. still use slip motors. Therefore, using frequency converters to achieve energy conservation is an urgent task for technological transformation.
7) Related to the working mode of the electric motor. For example, the energy savings of continuous operation, short-term operation, and intermittent operation are different.
8) It is related to the duration of the electric motor's operation. For example, if the device is turned on 24 hours a day, the energy savings will be greater if it is turned on 365 days a year, and vice versa.
9) It is related to the power of the electric motor itself. Under the same energy-saving rate, the higher the power, the greater the energy-saving value, and the greater the economic benefits. Even if the energy-saving rate is relatively lower than that of low-power motors, the actual benefits are greater.
10) It is related to the importance of the production process and equipment of our unit. Firstly, it is necessary to select products with high power consumption, high product costs, and current speed regulation methods that are not economically reasonable for modification. By switching to a frequency converter, immediate and twice the result with half the effort can be achieved.