This research is about the driving device of AC servo motor using voltage type butter circuit,In the drive device of the existing AC servo motor, the higher the DC voltage used for the frequency converter, the higher the voltage used to charge the smoothing capacitor,As the above-mentioned driving equipment generates a lot of heat by resistance of electric charge during driving or when paying attention to driving, the safety degree of driving device will be reduced,Due to the use of low-level discharge and generation resistance respectively, the composition of hardware presents complex problems.;The purpose of this study is to solve these previous problems. When the DC voltage used in the inverter is high in the operation of the AC servo motor drive device or in the driving instruction, it will also occur in the hot branch of the discharge control item to another discharge control item, so as to ensure the stability of the servo drive device. Height side,The low level used in the discharge of the voltage limiting part is not only the original use, but also the use of the oestrogen at the same time, thus simplifying the composition of the hardware.
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