Suppliers of frequency converter supporting equipment remind you that there are certain conditions for frequency converters 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. The main factors affecting the power saving rate are as follows.
① 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.
② Related to the load rate of the electric motor, when the load rate is between 10% and 90%, the maximum power saving rate is 8% to 10%. When the load rate is low, the corresponding power saving rate is higher, but the reactive power saving rate is between 40% and 50%, which does not include electricity bills.
③ It is related to the rationality of the original operating parameters, such as the adjustable values of pressure, flow rate, speed, etc. The larger the adjustable value, the higher the energy-saving rate, otherwise the opposite is true.
④ The use of imported or exported valves to adjust operating parameters, which is related to the original adjustment method, is very uneconomical. If it is changed to frequency converter speed regulation, it will be 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.
⑤ Related to the original speed regulation method, for example, 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, in industries such as light industry, textile, papermaking, printing and dyeing, plastics, rubber, etc Most of them still use slip motors, so using frequency converters to achieve energy conservation is an urgent task for technological transformation.
⑥ The amount of energy saved is different depending on the working mode of the electric motor, such as continuous operation, short-term operation, and intermittent operation.
⑦ It is related to the duration of the electric motor operation. For example, if the motor is turned on for 24 hours a day, the energy savings will be greater if it is turned on for 365 days a year, and vice versa.
⑧ 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 amount and the greater the economic benefits. Even if the energy-saving rate is relatively lower than that of low-power electric motors, the actual benefits are greater.
⑨ A importância dos equipamentos no processo de produção está relacionada à seleção de equipamentos que consomem muita eletricidade, têm altos custos de produção e cujo método de regulação de velocidade atual não é economicamente viável. Ao optar por um conversor de frequência, é possível obter resultados imediatos e reduzir o esforço ao dobro.
Ao escolher um conversor de frequência para regulação de velocidade ou economia de energia, os princípios acima devem ser seguidos como pré-requisito para a definição do plano. Os preços da eletricidade local são altos e, quando se economiza a mesma quantidade de energia, os benefícios econômicos são maiores, o que também é uma consideração importante.