The invention relates to an
air blower variable-frequency control device based on a
power frequency motor and a control method for the
air blower variable-frequency control device. The
air blower variable-frequency control device comprises the
power frequency motor, a frequency converter, a controller and a communication
assembly, wherein the frequency converter and the
power frequency motor are connected by virtue of an
electric wire, and the controller is in control connection with the frequency converter by virtue of the communication
assembly; the controller comprises a storage unit, a comparison unit, an alarm unit, a PLC (
programmable logic controller)
control unit and a detecting unit; an electric reactor is further arranged between the frequency converter and the power frequency motor; the detecting unit is connected to the power frequency motor, and is used for feeding back a detected actually-measured frequency value and an actually-measured current value of the power frequency motor, and an outlet total air flow value of the air blower to the comparison unit. The air blower variable-frequency control device has the advantages of being simple in structure, reasonable in design, high
in degree of
automation, and capable of effectively reducing a calorific value of a frequency converter motor to achieve the purpose of automatically regulating to realize energy saving; and by reasonably controlling and regulating the frequency of the frequency converter, and the occurrence of a surging phenomenon of the air blower due to energy waste or too
low frequency caused by too
high frequency is avoided.