과제
공장 환기, 보일러 유인 통풍, 하수처리 폭기, 건물 공급기 등 산업·민생 분야의 핵심 동력 설비인 팬은 전통 정주파수 방식에서 “과잉 용량 운전”(대출력 모터가 경부하 팬을 구동), 과도한 에너지 소비, 변속 곤란이라는 문제가 있었습니다. 인버터 기반 속도 제어와 팬의 부하 특성(제곱 토크 부하, 출력은 속도의 3제곱에 비례)을 결합하여 에너지 효율 운전, 정밀 유량 제어, 지능 관리를 실현합니다. 야금, 화학, 수처리, 건물 HVAC 등 다양한 분야의 팬 시스템 개조 및 신설 프로젝트에 적합합니다.
솔루션
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)