Analysis of Reformation of High Voltage Frequency Converter

(1) The high-voltage frequency converter offers an excellent soft start and stop function, allowing the motor to start at zero speed. During startup, the maximum current remains below the rated current, significantly reducing the inrush current impact on both the motor and the power grid. This helps minimize motor failures, extends the maintenance interval, and enhances the equipment's overall lifespan. Additionally, it effectively mitigates the adverse effects of sudden load changes on the electrical system;

(2) Following the frequency conversion upgrade, the original damper is fully opened, which greatly reduces mechanical wear and extends its service life. This leads to lower maintenance and repair costs, improving operational efficiency and reliability;

(3) The original hydraulic coupling has been removed after the frequency conversion transformation, eliminating the need for ongoing maintenance of the fluid coupling. This not only reduces costs but also simplifies the system and improves overall performance;

(4) The high-voltage inverter provides a smooth and precise speed control function, which minimizes mechanical stress on the fan and motor. It also helps reduce bearing temperatures and wear, leading to lower maintenance costs and longer equipment life. This results in improved system stability and reduced downtime;

(5) Implementing frequency conversion makes it easier to achieve automation in the dust control system. The airflow in the dust removal system often needs to be adjusted based on process requirements. Previously, using dampers made it challenging to maintain accurate airflow due to actuator wear and valve characteristic changes. With frequency conversion speed control, precise adjustments can be maintained at a high level (0.1 to 0.01 Hz), offering better conditions for automated dust control and improving overall system performance and efficiency.

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