(Bloomberg) -- Five minutes after the headline hit, the first email from a tight-knit club of guitar-pedal companies came through: “just won the tariff case!” “Seriously?!?!?!” was the first response.

Abstract: Vienna rectifier is a boost-type rectifier with unidirectional energy flow, which is widely used in many applications. Under unbalanced grid, there will be even harmonics in dc-link voltage ...