課題
工場換気、ボイラ誘引通風、汚水処理ばっ気、ビル空調給気など、産業・民生両面で中核となるファン設備は、従来の定周波数運転では「大馬小車」（大出力モータで低負荷ファンを駆動する状態）によるエネルギー過剰消費と速度調整の困難さが課題です。本ソリューションはインバータによる速度制御と、ファンの負荷特性（速度の3乗に比例する平方トルク負荷）を組み合わせ、省エネ運転・精密な流量制御・インテリジェント管理を実現。冶金、化学、水処理、ビル空調（HVAC）など幅広い分野の改造・新設に適合します。
ソリューション
With the core objectives of "energy conservation first, stability and reliability, and intelligent controllability", this solution conducts design from three aspects: hardware selection, system architecture, and control logic. The specific contents are as follows:
Hardware Selection: Matching Fan Load Characteristics
Inverters are selected based on the fan's rated power, rated voltage, and operating conditions (such as whether it involves shock loads and start-stop frequency). The core selection principles are as follows:
1.Inverter power selection: Considering the inrush current during fan startup (usually 1.5-2 times the rated current), the rated power of the inverter must be ≥ 1.1 times the rated power of the fan. If the fan is used in high-temperature and high-dust environments (such as mine ventilation and metallurgical sintering fans), an additional 10%-20% power margin must be reserved to prevent the inverter from overheating and overloading.
Example: For an 11kW three-phase asynchronous fan, a 15kW general-purpose inverter is recommended. If the ambient temperature is > 40°C, it is necessary to upgrade to an 18.5kW inverter and equip it with a matching cooling fan.
System Architecture: Two Modes (Single Unit and Cluster)