Abstract
Permanent magnet generators have the advantages of simple structure, high reliability, high efficiency, and energy saving. It is suitable for agricultural transportation vehicles, but there are some troubles on voltage regulation. In order to realize the stable output of permanent magnet generator, a kind of voltage-stabilizing method to ensure the average output voltage stability is proposed: by controlling the degree of clipping. First, the voltage regulation principle of permanent magnet generator is analyzed, mathematical model of permanent magnet generators in synchronous rotation coordinate system is built, and on this basis, the voltage-stabilizing circuit is designed. Second, the voltage-stabilizing circuit model of permanent magnet generator is created, the simulation analysis of reference point voltage and the output voltage under different speed and load is carried out, and the average value of output voltage is calculated according to the simulation curve taking advantage of the calculus principle. Third, the voltage-stabilizing circuit is made and tested. By comparing the simulation results with the experimental results, it is proved that the voltage-stabilizing circuit is suitable for the working characteristics of permanent magnet generator, the selected parameters of component are reasonable, and the simulation results are accurate and reliable. The circuit has excellent voltage-stabilizing performance. It provides a convenient and reliable method for the design and development of voltage-stabilizing circuit and promote the application of permanent magnet generator on agricultural transport vehicles.
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