The invention discloses a cascaded multi-
voltage-class power supply integrated conversion device of a magnetic suspension test
bed, and solves the problems of complex wiring,
electromagnetic interference superposition, parameter mismatch, low
power density and the like caused by independent design of a power supply conversion module of an existing magnetic suspension test
bed. The device is of an integrated structure and comprises an aluminum
alloy shell which is divided into a high-
voltage direct-current conversion cavity, a low-
voltage direct-current conversion cavity and an inversion cavity, each cavity is provided with an aluminum
alloy shielding partition plate and is sealed by
conductive rubber, and the bottom of the shell is provided with an integrated water-cooling flow channel; the high-voltage direct-current conversion circuit converts DC1500V into DC330V, the low-voltage direct-current conversion circuit converts the DC330V into DC110V, the
inverter converts the DC110V into AC220V, and the linkage control module achieves self-
adaptive matching of front-stage and rear-stage parameters. According to the invention, integration of four-stage voltage conversion is realized, conversion efficiency is improved,
electromagnetic interference is reduced, and installation and maintenance are greatly simplified.