Power module cascaded converter system

Patent metadata

Field	Value
Publication number	US-10164549-B2
Application number	US-201715832761-A
Country	US
Kind code	B2
Filing date	Dec 5, 2017
Priority date	Jan 24, 2017
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

Disclosed is a power module cascaded converter system, a control sub-system thereof includes a master controller, and is provided with switch modules corresponding one-to-one to power modules. For each switch module, before the corresponding power module is removed, a driver circuit thereof can drive the switch circuit into a closed state through a control signal sent from the master controller, so as to bypass the power module. An optical-electric module in the power module cascaded converter system converts an optical signal input from an optical fiber into an electrical signal. With a first control port of each switch module, which is detachably and electrically coupled to a second control port of the power module, the power module cascaded converter system can support insertion and extraction of the power module without cutting off electricity, thereby adding flexibility and convenience for replacing power modules.

First claim

What is claimed is:

1. A power module cascaded converter system, comprising: a control sub-system and a power sub-system, wherein the control sub-system comprises: a master controller and N switch modules that are connected in series, each of the switch modules comprising: a first power port, a first control port, a driver circuit, an optical-electric module and a switch circuit; the power sub-system comprises: N power modules, each of the power modules comprising: a second power port, a second control port and a power conversion circuit, wherein N is an integer greater than one;
the first power port of each of the switch modules is electrically connected to the second power port of corresponding one of the power modules;
the master controller is connected to the optical-electric module of each of the switch modules through an optical fiber, and the optical-electric module of each of the switch modules is electrically connected to the first control port, the first control port of each of the switch modules is detachably and electrically connected to the second control port of corresponding one of the power modules, so that the master controller transmits, via the switch modules, control signals with the corresponding power modules; and
the master controller transmits the control signals to the driver circuit of each of the switch modules, so as to control the driver circuit of each of the switch modules to drive the switch circuit of each of the switch modules to close or open, causing the corresponding power module to be bypassed or not bypassed.

2. The system according to claim 1 , wherein the switch circuit comprises: a first silicon controlled rectifier (SCR) and a second SCR, wherein the first SCR and the second SCR are connected in anti-parallel; and
the driver circuit of each of the switch modules drives the first SCR and the second SCR.

3. The system according to claim 1 , wherein the switch circuit comprises: a first insulated gate bipolar transistor (IGBT), a first diode, a second IGBT and a second diode;
wherein a positive electrode of the first diode is connected to an emitter of the second IGBT, a negative electrode of the first diode is connected to a collector of the first IGBT, an emitter of the first IGBT is connected to a positive electrode of the second diode, and a negative electrode of the second diode is coupled to a collector of the second IGBT.

4. The system according to claim 1 , wherein each of the switch modules comprises: a micro controller unit;
wherein the optical-electric module of each of the switch modules is electrically connected to the first control port and the driver circuit via the micro controller unit.

5. The system according to claim 1 , wherein the power module cascaded converter system comprises N electrical connectors, each of the electrical connectors comprising: a first assembly and a second assembly;
wherein the first assembly integrates the first power port and the first control port of one of the switch modules, and the second assembly integrates the second power port and the second control port of the corresponding one of the power modules.

6. The system according to claim 5 , wherein the first assembly of each of the electrical connectors comprises at least two guide grooves, and the second assembly comprises guide pins corresponding to the guide grooves.

7. The system according to claim 1 , wherein each of the switch modules is electrically connected to the corresponding first power port and causes the corresponding second power port to be bypassed or not bypassed.

8. The system according to claim 7 , wherein the power conversion circuit of each of the power modules is electrically connected to the corresponding second power port.

Assignees

• Delta Electronics Shanghai Co

Inventors

• Guo Desheng
• Zhang Weiqiang
• Liu Baoyu

Classifications

• H02M7/219

  in a bridge configuration · CPC title

• H02M3/1584 Primary

  with a plurality of power processing stages connected in parallel · CPC title

• H02M7/25 Primary

  arranged for operation in series, e.g. for multiplication of voltage · CPC title

• H02M7/003 Primary

  Constructional details, e.g. physical layout, assembly, wiring or busbar connections · CPC title

• H02M2001/325

  Electricity · mapped topic