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Prospect Analysis of High Frequency Inverter Used in ESP

Bangzhong Han


It has been difficult for the old ESP to meet the new dust emission standards, and the update of the equipment costs a lot of money, therefore, how to reach a higher cost performance becomes the focus of attention. After researches we found that the replacement of the industrial frequency power with the high-frequency inverter of the ESP power can greatly improve the collection efficiency, with a high cost performance and a good prospect of application. The core idea of electrostatic precipitators of high frequency inverter is to transfer three-phase working frequency power into DC power, make use of modernized power electronic technologies and transfer DC power inverter into high frequency AC for control. We can see from this article that electrostatic precipitators of high frequency inverter enjoy the following strengths: (l) Three-phase rectifier transfers three-phase AC power into DC power; the inverter transfers DC voltage into high frequency AC voltage. This method enjoys great flexibility in the control. (2) The output form of high frequency AC voltage square wave in the inverter transfers step-up transformer into high frequency transformer. (3) Compared with the traditional power supply of controllable silicon working frequency phase control electrostatic precipitators, the electrostatic precipitators power supply of high frequency inverter adopts full-controllable power component: IGBT which features  swift switch-on/off speed and in case of flashover in the electrostatic precipitators, it is switched off immediately. Research has discovered that high frequency inverter can greatly upgrade the dust collection efficiency, enjoy favorable advancement and very high performance-price ratio and realize broad application prospect.


High-frequency inverter; ESP; Power optimization; Energy saving and emission reduction

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