Nine-Switch Detroit Rectifier

This paper proposed a novel four-level rectifier with only nine power switches, called by nine-switch Detroit rectifier. Compared with the existing four-level rectifiers, the quantity of components and the voltage stresses across components are both reduced. Four output levels are achieved with small component voltage stress in the proposed four-level rectifier, which is suitable for medium voltage (<10kV) applications and low voltage (<1kV) applications as well. A carrier-based modulation scheme of the proposed nine-switch Detroit rectifier is also presented in this paper.