Aviation wind tunnel is used to simulate the flow of gas around the aircraft and object through the artificial produce and control of air flow, and can measure the effect of air flow on the object and observe physical phenomena to research the aerodynamic characteristics of spacecraft. The solution of wind tunnel frequency control system is to solve a series of wind tunnel test bed’s problems such as difficulty in air regulation, low safety, large maintenance, high failure rate, high maintenance cost and inability to remote monitoring. The system contains of power supply and distribution subsystem, variable frequency motor, variable frequency subsystem and monitoring subsystem, shaft drive subsystem, and upper computer operation subsystem.
The compressor of air source station has the characteristics of large power, large quantity and frequent starting. Using AC drives as soft starter can improve the compressor start performance