Study On Working Point Control System Of Safe Economical Running Of Ventilation Facilities

This dissertation studies on the work condition control of safe and economical running of ventilator. To adopt technology of frequency control and electric-hydraulic servo-control can automatically adjust ventilator working condition and analyze the economy and safety of its running. Part that needs frequency control adopts control technology of computer and universal electromotor and controls the transducer according to the formula that is voltage/frequency=const, which can adjust the speed of electromotor and accordingly control the working condition of ventilator. Fix-angle adjusting of vanes is more facilitate and prompt than before by controlling hydraulic adjusting system of moving vanes of ventilator, which can owe to combination of hydraulic and computer control technology. This article makes the communications and control of the above system come true by adopting communication controls of Visual Basic 6.0 and RS-232 or RS-485 serial port of computer. Software and interface of system are completed with the help of powerful function and friendly interface of Visual Basic 6. 0. Besides, this article also probes into the system remote-control with network.