Floating Power Supply Based on Bootstrap Operation for Three-Level Neutral-Point-Clamped Voltage-Source Inverter

  • Published : 2011.11.25

Abstract

This paper presents a survey of floating power supply based on bootstrap operation for three-level voltage-source inverters. The floating power supply for upper switches is achieved by the bootstrap capacitor charged during on-time of the switch underneath. Hence, a large number of bulky isolated DC/DC power supplies for each gate driver are reduced. The Pspice simulation results show the behavior of bootstrap devices and the performance of bootstrap capacitor voltage.

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