The System Of Electric Design And Achievement In HY-750 Low Speed Round Unclosed Wind Tunnel

HY-750 wind tunnel is the low speed, unclose and circumfluence wind tunnel that it gather teaching and scientific research. When we built motive system and test system, we followed design principle of whole to part. In initial stage of building HY-750 wind tunnel electric system, we decompose it to become son system of relative independence, simple and easily processed. Finally, We proceed development of one part.It was to base on researching a few large wind tunnel in China, to use for reference foreign experience of building wind tunnel electric system, to combine the new technique and to absorb the old experience, for the whole electric system designing scheme was advance. The project included the HY-750 wind tunnel power system with AC frequency conversion engineering, measure and control system with computer of industry control unite control card and software with graphics mode program. It fit require of practical, credible, exoteric, economical and maintenance etc. This paper provided idiographic designing scheme and designing frame draw of electric system of HY-750 wind tunnel.After HY-750 wind tunnel was built complete , we had proceeded test of collate and measure of flow field, and tunnel adjust of DBM-01 standard model. Result of test have proved: HY-750 wind tunnel electric system work firm, have good exoteric, credible and higher precision of testing. It's designing have achieved scheduled guide line.