Relationship between the frequency and the heating efficiency of induction heating power supply
YuanTuo furnace company specialized in producing all kinds of Induction heating furnace and induction heating equipment. Converting electromagnetic induction heating system is complex, so it is difficult to obtain the overall efficiency of the system. Usually represented by the efficiency of the sensor as an alternative power source frequency basis. To this end, the pursuit of high sensor heating efficiency is to select the target frequency induction heating power supply.
1.The impact on the power frequency electrical efficiency η2: Under the same conditions, with the increase of power frequency, electrical efficiency is increased from a low. When the power frequency increases to a certain value, the electrical efficiency is maximized. While continuing to increase the power frequency, electrical efficiency remains unchanged, at a maximum. In this case the electrical efficiency of induction heating to the theoretical limit, which is 86.5%, i.e., the current penetration depth δ2 layer is converted into thermal energy for heating the entire metal. Thus. Any sensor will not reach the electrical efficiency ratio. Therefore, the efficiency of induction heating power supply frequency to choose from, not the pursuit of high power frequency. Often when electrical efficiency of 75% to 50%, can be used as the basis for selecting a power frequency.
2.the impact on the thermal efficiency of power frequency: Under the same conditions, with increasing frequency power supply, the thermal efficiency decreases. Because with the increase of power frequency, skin effect current increases, the metal surface temperature rises quicker, the relative heat loss is increased, decreased thermal efficiency. From the thermal efficiency of induction heating power consider choosing a lower frequency heating more favorable.
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Post time: 05-26-2016