Development Of A High-Speed Electric Drive System

With the development of aviation technology, various parameters of aviation generator have higher requirements for testing accuracy. A Helicopter Aviation Generator Test-bed has an important role in testing the characteristics of helicopters as well as supplying power to new developing machines and electrifying equipment for testing. The high speed electric drag test bed simulates characteristics of aircraft engines, which can drag generators, provide advanced testing methods for developing helicopters and ensure the delivery of various models on time. In this paper, we will develop a high-speed electric drive system which based on the drag characteristics of aircraft engines to test the performance of the helicopter powers.In this paper, we adopted AC frequency conversion speed, mechanical speed driving program. We mainly designed a speed increase device structure of the drag test-bed and analyzed static force and modes of key shaft parts to optimize their structure.A mathematical model of an asynchronous motor was established and simplified by coordinate transformation. According to basic equations of vector control, we built the structure of vector control asynchronous motor simulation model as well as the closed loop flux vector control model using MATLAB/SIMULINK, and analyzed the vector control algorithm on simulation.Using a graphical programming language LabVIEW as the core of the software, we designed and developed a monitoring program based on virtual instruments, which used PC control the convertor's output by serial communication and controlled motor speed with its built-in PI closed-loop. This software is stable, reliable, user friendly and so on. It can real-time monitor running state of the drag system.Finally an experimental verification device of the drive system was set up, which mainly tested the high-speed electric drive system under the PC controlling, two speed-given modes "classification given" and "wave set" as well as the operation performance of the manual control mode. It can verify the high efficiency and stability of the high-speed electric drive system's monitoring software.