Design and Development of Testing System of Motor and Electronic Controller in Engineering
|Course||Design and manufacture of ship and marine engineering structures|
|Keywords||Energy conservation and emission reduction Electric forklift Electric propulsion Dynamic testing Performance matching|
Because of the low voltage and high current characteristics of electric forklift motor and the requirement of motor drive to equip relevant controller, so the matching design and debugging for motor and controller must be done strictly, otherwise security problems may occur, such as burnout of power transistor of electric controller or motor armature winding, but the matching design, which is needed to do a large number of tests for verifying the properties of system, is done difficultly. There is no comprehensive type of test platform in china at present. Establishment of the special test platform which is used to do characteristic measurement and parameter matching, is very important for forklift factory, to obtain the best match on dynamic performance between motor and electrical controller and demonstrate the optimization of system.Combined with the development of "motor and electric controller test system" for Xiamen XGMA Machinery Co., Ltd., the subject of this paper designed and developed the test system with multi-channel synchronous data acquisition and automatic control for AC and DC motor used on 1t ~ 5t electric forklift. In this paper, the research work carried out includes:Firstly, according to test requirements, which consisted of four parts: system transmission structure, power source, loading source, testing and controlling system, the hardware test platform of motor that was emphatically to solve low voltage and high current of program control drive system which was the need of traction motor in forklift and loading system which was the need of experimental simulation, was built through choosing reasonable plan.Secondly, characteristic equation about DC motor and AC motor was established to analyze control mode of driving power and provide theoretical basis for verifying test and data analysis. Based on transmission equations and mathematical model of AC motor, the stability of test platform as well as the control method of dynamometer were analyzed. Besides, the test system was constructed and accelerator simulation was designed. Eventually, the program of test and control system, which can complete report output, was compiled to achieve the state performance and dynamic performance testing for different manufacturers as well as types of AC, DC motor.Finally, by setting up simple forklift electrical system and control system, to design the verification experiment, the independent test of DC motor and AC motor as well as the measurement of system parameters under the control of electronic controller were realized. The properties of test and control system were analyzed. In addition, the characteristic of tested motors and control performance of electronic controller were investigated and the matching ability between motor and electrical controller was demonstrated. The control mechanism of electronic controller was obtained and the research results show that the equipment should be improved in security.According to the future of electric forklift truck, the design and development of testing system of motor and electronic controller in engineering was achieved in this paper upgrading the level of research and measurement, independent development as well as international influence on forklift industry, and there is no similar applied production interiorly by far in the domestic. The test system which has been tested by the cooperative company has passed the project check, and all of the technical index meet the program requests.