Fan filter is the main component of modern clean room air conditioner. Its parts include DC brushless motor, motor driver, centrifugal fan, box flow channel, and high-efficiency filter. This paper identifies the practical mathematical model of this component, which is used to upgrade the design of the whole machine and the parameter setting of the motor driver. The identification method adopts the parameterization of the mathematical model, and then identifies the parameter value through the measurement data. The measurement data such as runner wind speed, fan blade pressure difference, motor current, etc. are intercepted and stored, and then digital signal processing is performed, and then through reverse operation, the undetermined parameters in the parameterized model are identified. The identified electromechanical model is also used to discuss the energy-saving upgrade of the fan filter unit. Using the electromechanical efficiency as an indicator, the energy-saving matching of the driver, motor, and fan is reviewed.
Keywords: fan filter unit, parameterization, parameter identification, electromechanical efficiency
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