公开(公告)号：US20200044561A1

公开(公告)日：2020-02-06

申请号：US16390016

申请日：2019-04-22

Applicant: Delta Electronics, Inc.

Inventor： Wei SUN ,  Wenjiang ZHAO ,  Yongqiang LANG ,  Peter Mantovanelli BARBOSA

IPC: H02M1/38 ,  H02M5/04

Abstract: A dead zone compensation circuit includes: a coordinate transformation module configured to perform a coordinate transformation on three-phase output currents of the three-phase frequency converter based on a given angle, for transforming the three-phase output currents from a three-phase static coordinate to a two-phase rotary coordinate to obtain a reactive current component of the three-phase output currents; a filter module configured to obtain a reactive current fluctuation amount; an error calculation module configured to calculate an error between the reactive current fluctuation amount and a zero value; a regulation and control module configured to regulate and control the reactive current fluctuation amount based on the error, for obtaining a voltage regulation variation; and a summing module configured to add the voltage regulation variation to a reference voltage, for obtaining a regulated voltage, the regulated voltage being used to generate a driving signal for the three-phase frequency converter.