According to operation characteristics of mine hoist. a back-to-back modular multilevel converter composed of modular multilevel rectifier and modular multilevel inverter was used for control of mine hoist. In view of current research on pre-charging control for modular multi-level inverter through DC side was less. a pre-charging control strategy of modular multilevel inverter was pr... https://sportsfanislanders.shop/product-category/bag/