ACI Heavy Load Blower Dedicated Variable Frequency Converter The heavy-duty fan dedicated frequency converter is a frequency
conversion speed control device designed specifically for fans
operating under heavy-duty conditions. It combines the high
overload capacity of the heavy-duty frequency converter with the
dedicated control function of the fan frequency converter, and can
adapt to the large inertia and frequent start stop requirements of
the fan load. It is widely used in heavy industries such as
metallurgy, mining, power, and chemical engineering. Main features - High overload capacity Capable of instantaneous overload with a rated current of 150%
-200%, meeting the surge current requirements during fan start-up
or stalling. For example, in the event of a sudden change in fan load or
blockage of the air duct, the frequency converter can withstand
short-term overload without tripping.
- Vector control technology By using field oriented vector control (FOC) or direct torque
control (DTC), low-speed high torque output is achieved to ensure
stable operation of the fan at low frequencies (such as 5Hz). Suitable for scenarios where fans require frequent speed regulation
or low-speed operation.
- Fan specific functions Anti surge control: Built in surge prediction algorithm, avoids
fan surge by adjusting speed or guide vane angle. PID automatic
adjustment: supports closed-loop control of pressure, flow, etc.,
achieving constant pressure air supply or constant flow operation.
Speed start function: allows the frequency converter to start
directly without stopping when the fan rotates due to inertia.
- Reliability and Durability Strengthen heat dissipation design (such as duct optimization,
intelligent air cooling) to adapt to harsh environments such as
high temperatures and dust. Key components such as IGBTs and
capacitors adopt industrial grade or heavy-duty specifications to
extend their service life.
Application - Industrial ventilation system
Steel plant blast furnace blowers, cement plant kiln exhaust fans,
etc. need to withstand heavy load starting and frequent speed
regulation. - Mine ventilation and dust removal
The main ventilation fan of the mine and the dust removal fan of
the beneficiation plant require high reliability and
explosion-proof performance (some products can choose
explosion-proof type). - Power industry
The primary and secondary fans of a thermal power plant need to be
controlled automatically in conjunction with a DCS system. - Chemical Industry and Environmental Protection
Exhaust gas treatment fans and sewage treatment aeration fans need
to adapt to corrosive gases and humid environments.
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