US 11,601,046 B2Granted

Three-phase double t-type four-level rectifier

AssigneeWayne State University

InventorsJianfei Chen, Caisheng Wang

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Abstract

A four-level rectifier may include an output, a first capacitor, a second capacitor, a third capacitor, and three phases. The first, second, and third capacitors may be connected in series. The output may be connected between the first capacitor and the third capacitor. Each of the three phases may include an input, a first diode, a second diode, a first switch, a second switch, and a third switch. The first diode may be connected between the input and the first capacitor. The second diode may be connected between the input and the third capacitor. The first switch may be connected between the input and the second switch and the third switch. The second switch may be connected to the first capacitor and to the second capacitor. The third switch may be connected to the second capacitor and to the third capacitor.

Claims20

Dependent claims

A four-level rectifier, comprising:

an output;
a first capacitor, a second capacitor, and a third capacitor in series connection, the first capacitor, the second capacitor, and the third capacitor each having a first side and a second side, the output connected between the first side of the first capacitor and the second side of the third capacitor;
and
three phases, each phase of the three phases including:
an input;
a first diode connected between the input and the first side of the first capacitor;
a second diode connected between the input and the second side of the third capacitor;
and
a first switch, a second switch, and a third switch each having a first side and a second side;
wherein the first switch is connected between the input and the first side of the second switch and the first side of the third switch;
wherein the second side of the second switch is connected to the second side of the first capacitor and to the first side of the second capacitor;
and
wherein the second side of the third switch is connected to the second side of the second capacitor and to the first side of the third capacitor.

10 more elements

A four-level rectifier, comprising:

a positive output;
a negative output;
a first capacitor, a second capacitor, and a third capacitor in series connection, the first capacitor, the second capacitor, and the third capacitor each having a first side and a second side, the positive output connected to the first side of the first capacitor and the negative output connected to the second side of the third capacitor;
and
three phases, each phase of the three phases including:
an input;
a first diode having a cathode in connection with the positive output;
a second diode having a cathode connected to an anode of the first diode;
a third diode having a cathode connected to an anode of the second diode and to the input;
a fourth diode having (i) a cathode connected to an anode of the third diode and (ii) an anode in connection with the negative output;
and
at least one first switch, a second switch, and a third switch each having a first side and a second side;
wherein the at least one first switch is connected between the cathode of the second diode and the anode of the third diode, the at least one first switch configured to control current flow to the first side of the second switch and to the first side of the third switch;
wherein the second side of the second switch is connected to the second side of the first capacitor and to the first side of the second capacitor;
and
wherein the second side of the third switch is connected to the second side of the second capacitor and to the first side of the third capacitor.

13 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/280,630Filed 26 Sep 2019 · us provisional application
Priority: 28 Sep 2018
Published: US 2022/0029529 A127 Jan 2022
Granted: 7 Mar 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H02M 1/44
Details of apparatus for conversion: circuits or arrangements for compensating for electromagnetic interference in converters or inverters
H02M 7/487
Converters with outputs that each can have more than two voltages levels: neutral point clamped inverters
H02M 7/797
Using devices of a triode or transistor type requiring continuous application of a control signal: using semiconductor devices only
H02M 7/219
Using semiconductor devices only: in a bridge configuration