| The developmental prosperity of transmission test system and the categories of automobile parts test apparatus are shortly described. The advantages and disadvantages of open transmission tester, mechanical energy return and electric energy return transmission tester are comparatively analyzed. The electric energy return transmission tester is selected as the scheme of the transmission tester, which is sensitive and economy, can be controlled and arranged conveniently and is not restricted by the size and gear ratio of the tested assembly. According to the maximum power and the maximum torque which can be transmitted by the transmission, direct current electromotor and dynamotor are selected, because they can be easily controlled, have broad timing bound. According to the maximum power and the maximum torque which can be transmitted by the transmission, the rev and torque sensor , transmission and joint are selected. Therefore this graduated to design the lesson the recovery system for aim at DTC control system and drawing-back the reborn energy of the variable frequency drive set to proceeds the extensive researched, and got a complete inversion and recovery system project, and proofed by a experiment. this thesis will introduce the system project in a concrete way, and will carefully expound the technique details about the drive of IGBT,the controller of inversion-system,the allotmenter of PWM pulse constituted by CPLD,the afterflow,and the infallible protection circles. . Assembly drawing and parts drawing are drawn. The scheme of the cvt test is planed and some of the test data is disposed with the program composed with Virtual Instrument which is called LabWindows/CVI. |
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