Phase-shift autotransformer, multi-pulse rectifier systems and fast charging

Patent metadata

Field	Value
Publication number	US-2021304958-A1
Application number	US-202016836834-A
Country	US
Kind code	A1
Filing date	Mar 31, 2020
Priority date	Mar 31, 2020
Publication date	Sep 30, 2021
Grant date	—

Abstract

The present disclosure relates to systems and configurations for phase-shift autotransformers and multi-pulse rectifiers. A phase-shift autotransformer includes a wiring configuration for first, second and third magnetic cores, the wiring configuration including primary input and phase-shift windings. The primary input windings are configured to provide a first and second primary input inductances, and phase-shift windings of the wiring configuration are configured to provide multiple inductances for each phase-shift winding. A multi-pulse rectifier is provided including a phase-shifting autotransformer, a diode bridge rectifier configuration coupled to output of the autotransformer and a filtering capacitor coupled to the diode bridge rectifier. Other embodiments are directed to use of the multi-use rectifier system with vehicle charging station, such as an Electric Vehicle Supply Equipment (EVSE).

First claim

What is claimed is:

1 . A phase-shift autotransformer comprising:
a first magnetic core, a second magnetic core and a third magnetic core; a wiring configuration for the first, second and third magnetic cores, wherein the wiring configuration includes primary input and phase-shift windings; an input coupled to the wiring configuration, the input configured to receive AC input; and an output coupled to the wiring configuration, the output configured to provide six-phase voltage output,
wherein primary input windings of the wiring configuration and the first, second and third magnetic cores are configured to provide a first primary input inductance, a second primary input inductance, and a third primary input inductance, and
wherein phase-shift windings of the wiring configuration and the first, second and third magnetic cores are configured to provide
a first and second inductance for phase-shift windings of the first magnetic core, a third and fourth inductance for phase-shift windings of the second magnetic core, and a fifth and sixth inductance for phase-shift windings of the third magnetic core.

2 . The phase-shift autotransformer of claim 1 , wherein the first magnetic core, the second magnetic core and the third magnetic core include at least one of a five-column core and E-type core.

3 . The phase-shift autotransformer of claim 1 , wherein output of the first primary inductance is coupled to the third and fourth inductance for phase-shift windings of the second magnetic core, output of the second primary inductance is coupled to the fifth and sixth inductance for phase-shift windings of the third magnetic core, and output of the third primary inductance is coupled to the first and second inductance for phase-shift windings of the first magnetic core.

4 . The phase-shift autotransformer of claim 1 , wherein output of the first primary inductance is coupled between the third and fourth inductance for phase-shift windings of the second magnetic core, output of the second primary inductance is coupled between the fifth and sixth inductance for phase-shift windings of the third magnetic core, and output of the third primary inductance is coupled between the first and second inductance for phase-shift windings of the first magnetic core.

5 . The phase-shift autotransformer of claim 1 , wherein phase angle of AC input voltage and current at each phase is shifted by the first primary input inductance, a second primary input inductance, and a third primary input inductance of the primary input windings of the wiring configuration.

6 . The phase-shift autotransformer of claim 1 , wherein phase-shift windings of the wiring configuration and the first, second and third magnetic cores are configured to provide two voltage components for each core.

7 . The phase-shift autotransformer of claim 1 , wherein the first magnetic core, the second magnetic core, the third magnetic core and the wiring configuration are configured to provide a capacity rating of about 10% of output power for a rectifier.

8 . The phase-shift autotransformer of claim 1 , wherein the output of the autotransformer is configured to output six-phase output to a multi-pulse rectifier.

9 . The phase-shift autotransformer of claim 1 , wherein the first magnetic core, a second magnetic core, third magnetic core and a wiring configuration are configured to provide a total kVA rating of about 9% output power.

10 . A multi-pulse rectifier system comprising:
a phase-shift autotransformer including
a first magnetic core, a second magnetic core and a third magnetic core;
a wiring configuration for the first, second and third magnetic cores, wherein the wiring configuration includes primary input and phase-shift windings;
an input coupled to the wiring configuration, the input configured to receive AC input; and
an output coupled to the wiring configuration, the output configured to provide six-phase voltage output,
wherein primary input windings of the wiring configuration and the first, second and third magnetic cores are configured to provide a first primary input inductance, a second primary input inductance, and a third primary input inductance, and
wherein phase-shift windings of the wiring configuration and the first, second and third magnetic cores are configured to provide
a first and second inductance for phase-shift windings of the first magnetic core, a third and fourth inductance for phase-shift windings of the second magnetic core, and a fifth and sixth inductance for phase-shift windings of the third magnetic core,

a diode bridge rectifier configuration coupled to the output; and a filtering capacitor coupled to the diode bridge rectifier.

11 . The multi-pulse rectifier system of claim 10 , wherein the first magnetic core, the second magnetic core and the third magnetic core include at least one of a five-column core and E-type core.

12 . The multi-pulse rectifier system of claim 10 , wherein output of the first primary inductance is coupled to the third and fourth inductance for phase-shift windings of the second magnetic core, output of the second primary inductance is coupled to the fifth and sixth inductance for phase-shift windings of the third magnetic core, and output of the third primary inductance is coupled to the first and second inductance for phase-shift windings of the first magnetic core.

13 . The multi-pulse rectifier system of claim 10 , wherein output of the first primary inductance is coupled between the third and fourth inductance for phase-shift windings of the second magnetic core, output of the second primary inductance is coupled between the fifth and sixth inductance for phase-shift windings of the third magnetic core, and output of the third primary inductance is coupled between the first and second inductance for phase-shift windings of the first magnetic core.

14 . The multi-pulse rectifier system of claim 10 , wherein phase angle of AC input voltage and current at each phase is shifted by the first primary input inductance, a second primary input inductance, and a third primary input inductance of the primary input windings of the wiring configuration.

15 . The multi-pulse rectifier system of claim 10 , wherein phase-shift windings of the wiring configuration and the first, second and third magnetic cores are configured to provide two voltage components for each core.

16 . The multi-pulse rectifier system of claim 10 , wherein the first magnetic core, the second magnetic core, the third magnetic core and the wiring configuration are configured to provide a capacity rating of about 10% of output power for a rectifier.

17 . The multi-pulse rectifier system of claim 10 , wherein the output of the autotransformer is configured to output six-phase output to a multi-pulse rectifier.

18 . The multi-pulse rectifier system of claim 10 , wherein the first magnetic core, a second magnetic core, third magnetic core and a wiring configuration are configured to provide a total kVA rating of about 9% output power.

19 . A charging station comprising:
a charging connection; and a multi-pulse rectifier system coupled to the charging connection, the multi-pulse rectifier system including a phase-shift autotransformer,
the phase-shift autotransformer including
a first magnetic core, a second magnetic core and a third magnetic core;
a wiring configuration for the first, second and third magnetic cores, wherein the wiring configuration includes primary input and phase-shift windings;
an input coupled to the wir

Assignees

• Karma Automotive Llc

Inventors

• Yu Xiaohang
• Tang Lixin
• Niu Geng

Classifications

• Y02T10/72

  Electric energy management in electromobility · CPC title

• H02M7/04

  by static converters · CPC title

• H02M1/4266

  using passive elements · CPC title

• H02M1/4216

  operating from a three-phase input voltage (H02M1/4233 takes precedence) · CPC title

• H01F27/29

  Terminals; Tapping arrangements {for signal inductances} · CPC title