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.

公开(公告)号：US20240405661A1

公开(公告)日：2024-12-05

申请号：US18669497

申请日：2024-05-20

Applicant: DELTA ELECTRONICS, INC.

Inventor： Rufeng LIU ,  Rongtang CHU ,  Yongqiang LANG

IPC: H02M1/00 ,  H02M1/32 ,  H02M1/36

Abstract: The present application provides a cascade converter, including a main control system, a plurality of power modules, and a bypass circuit corresponding to each power module; where the main control system is communicatively connected to each power module, the power modules are electrically connected in turn, and any one of the power modules has at least one communicable power module, the communicable power module is an else power module communicatively connected to the power module, and the number of power modules spaced apart is within a preset value; the power module on which a fault occurs is a faulty power module, the faulty power module sends a fault signal to the main control system; the main control system generates a bypass command according to the fault signal and sends it to the faulty power module and the communicable power module of the faulty power module.