Apparatus for Connecting a Shared DC Bus Link

• US 20150099378A1
• Filed: 10/04/2013
• Published: 04/09/2015
• Est. Priority Date: 10/04/2013
• Status: Active Grant

• Current Assignee: Rockwell Automation Technologies Incorporated (Allen-Bradley Co., Inc.)
• Original Assignee: Rockwell Automation Technologies Incorporated (Allen-Bradley Co., Inc.)
• Inventors: Bronk, Kelly J., Matocky, Mathew S.
• Granted Patent: US 9,093,804 B2
• Time in Patent Office: Days
• US Class Current: 439/110
• CPC Class Codes: H01R 12/7088 Arrangements for power supply
• CPC Class Codes: H01R 25/142 Their counterparts
• CPC Class Codes: H01R 31/02 Intermediate parts for distributing energy to two or more circuits in parallel, e.g. splitter with a holder adapted for supporting apparatus to which its counterpart is attached H01R33/92

Abstract

A system for connecting a shared DC bus between multiple power converters is disclosed. The DC bus includes a positive and a negative rail across which the DC voltage is present. A pair of DC bus stabs is mounted to a PCB within the power converter. Each DC bus stab is electrically connected to either the positive or negative rail. A connector assembly is mounted to the housing of the power converter such that a first receptacle engages a plug portion of the DC bus stab. The connector assembly also includes a second receptacle extending to the exterior of the power converter. The connector assembly is positioned on each power converter such that a known distance, or one of a number of known distances, is established between adjacent connector assemblies. A DC bus assembly extends between and is plugged into the second receptacle of the two adjacent connector assemblies.

Claims

1. A connector system configured to share a direct current (DC) bus between a first power converter and a second power converter, the connector system, comprising:

a first DC bus stab having a plug portion and a mounting portion configured to be mounted to a first printed circuit board (PCB), wherein the first PCB is mounted within the first power converter;

a second DC bus stab having a plug portion and a mounting portion configured to he mounted to a second PCB, wherein the second PCB is mounted within the second power converter;

a first connector assembly including a first receptacle configured to receive the plug portion of the first DC bus stab and a second receptacle configured to extend exterior to the first power converter;

a second connector assembly including a first receptacle configured to receive the plug portion of the second DC bus stab and a second receptacle configured to extend exterior to the second power converter; and

a bus bar assembly including;

a bus bar having a first end configured to be inserted into the second receptacle of the first connector assembly and a second end configured to be inserted into the second receptacle of the second connector assembly, and

a non-conductive housing enclosing at least a portion of the bus bar between the first end and the second end.

3. The connector system of claim 1 wherein:

the first connector assembly further includes a first housing having a first portion configured to be interior to the first power converter and a second portion configured to be exterior to the first power converter, wherein the first housing includes a retainer on the second portion configured to positively retain the first connector assembly to the first power converter, and

the second connector assembly further includes a second housing having a first portion configured to be interior to the second power converter and a second portion configured to be exterior to the second power converter, wherein the second housing includes a retainer on the second portion configured to positively retain the second connector assembly to the second power converter.

4. The connector system of claim 3 wherein the bus bar includes:

a first side proximate to the first and second power converters,

a second side distal from the first and second power converters, and

a third and a fourth side, each of the third and fourth sides extending between the first and second sides, and

wherein the nonconductive housing extends longitudinally along each of the second, third, and fourth sides of the bus bar.

5. The connector system of claim 4 further comprising an end cap configured to cover a portion of the second receptacle of each of the first and the second power converters not receiving the bus bar.

6. The connector system of claim 4 wherein:

the second portion of each of the first housing and the second housing for the first and the second connector assemblies, respectively, includes a first half of a retainer,

the non-conductive housing of the bus bar assembly includes a second half of the retainer, and

when the bus bar assembly is inserted across the first and the second connector assemblies, the second half of the retainer engages the first half of the retainer to positively retain the bus bar assembly to the first and the second connector assemblies.

2. The connector system of claim I wherein:

the first connector assembly further includes a third receptacle, wherein the third receptacle is configured to extend outside the first power converter,

the second connector assembly further includes a third receptacle, wherein the third receptacle is configured to extend outside the second power converter,

the bus bar of the bus bar assembly is a first bus bar,

the bus bar assembly includes a second bus bar having a first end configured to be inserted into the third receptacle of the first connector assembly and a second end configured to be inserted into the third receptacle of the second connector assembly, and

the non-conductive housing encloses at least a portion of the second bus bar between the first end and the second end.

7. A connector for a device configured to share at least one power rail, the connector including:

a stab having a first portion and a second portion, wherein the first portion is configured to be mounted to a printed circuit board (PCB) to establish an electrical connection with a first power rail within the device; and

a connector assembly including a first receptacle configured to receive the second portion of the stab and a second receptacle configured to extend outside of a housing for the device, wherein the second receptacle is configured to receive a first bus bar in a first portion of the second receptacle, to receive a second bus bar in a second portion of the second receptacle, and to establish an electrical connection between the first bus bar, the second bus bar, and the first power rail within the device.

8. The connector of claim 7 wherein the connector assembly includes a third receptacle configured to extend outside of the housing for the device and wherein the third receptacle is configured to receive a third bus bar in a first portion of the third receptacle, to receive a fourth bus bar in a second portion of the second receptacle, and to establish an electrical connection between the third bus bar, the fourth bus bar, and the first power rail within the device.

9. The connector of claim 7 wherein the stab is a first stab and the connector assembly is a first connector assembly, the connector further comprising

a second stab having a first portion and a second portion, wherein the first portion of the second stab is configured to be mounted to the PCB to establish an electrical connection with a second power rail within the device;

and

a second connector assembly including a first receptacle configured to receive the second portion of the second stab and a second receptacle configured to extend outside of the housing for the device, wherein the second receptacle of the second connector assembly is configured to receive a third bus bar in a first portion of the second receptacle, to receive a fourth bus bar in a second portion of the third receptacle, and to establish an electrical connection between the third bus bar, the fourth bus bar, and the second power rail within the device.

10. The connector of claim 7 wherein the connector assembly includes a housing having a first portion configured to be interior to the device and a second portion configured to be exterior to the device and wherein the housing includes a retainer on the second portion configured to positively retain the first connector assembly to the device.

11. The connector of claim 10 wherein the second portion of the housing includes a first half of a second retainer, the bus bar includes a second half of the second retainer, and when the bus bar is inserted into the connector assembly, the second half of the second retainer engages the first half of the second retainer to positively retain the bus bar to the connector assembly.

12. The connector of claim 7 wherein the second receptacle of the connector assembly extends from one of a top surface, a front surface, and a rear surface of the housing for the device.

13. A connector for a shared DC bus, wherein the shared DC bus includes a positive rail and a negative rail, the connector including:

a first DC bus stab having a first portion and a second portion, wherein the first portion is configured to be mounted to a printed circuit board (PCB) and electrically connected to the positive rail of the DC bus;

a second DC bus stab having a first portion and a second portion, wherein the first portion is configured to be mounted to the PCB and electrically connected to the negative rail of the DC bus;

a first connector assembly including a first receptacle configured to receive the second portion of the first DC bus stab and a second receptacle, wherein the second receptacle is configured to receive a first bus bar in a first portion of the second receptacle, to receive a second bus bar in a second portion of the second receptacle, and to establish an electrical connection between the first bus bar, the second bus bar, and the positive rail of the DC bus via the first connector assembly and the first DC bus stab; and

a second connector assembly including a first receptacle configured to receive the second portion of the second DC bus stab and a second receptacle, wherein the second receptacle is configured to receive a third bus bar in a first portion of the second receptacle, to receive a fourth bus bar in a second portion of the second receptacle, and to establish an electrical connection between the third bus bar, the fourth bus bar, and the negative rail of the DC bus via the second connector assembly and the second DC bus stab.

14. The connector of claim 13 wherein:

the first connector assembly includes a third receptacle, wherein the third receptacle of the first connector assembly is configured to receive a fifth bus bar in a first portion of the third receptacle, to receive a sixth bus bar in a second portion of the third receptacle, and to establish an electrical connection between the fifth bus bar, the sixth bus bar, and the positive rail of the DC bus via the first connector assembly and the first DC bus stab; and

the second connector assembly includes a third receptacle, wherein the third receptacle of the second connector assembly is configured to receive a seventh bus bar in a first portion of the third receptacle, to receive an eighth bus bar in a second portion of the third receptacle, and to establish an electrical connection between the seventh bus bar, the eighth bus bar, and the negative rail of the DC bus via the second connector assembly and the second DC bus stab.

15. The connector of claim 13 wherein:

the first connector assembly further includes a first housing having a first portion and a second portion, wherein the first housing includes a first retainer on the second portion configured to positively retain the first connector assembly to a device utilizing the shared DC bus, and

the second connector assembly further includes a second housing having a first portion and a second portion, wherein the second housing includes a retainer on the second portion configured to positively retain the second connector assembly to the device.

16. The connector of claim 15 wherein the first housing is connected to the second housing.

17. The connector of claim 15 wherein the first housing and the second housing are integrally formed as a single housing.

18. The connector of claim 15 wherein:

the second portions of both the first housing and the second housing include a first half of a second retainer,

the first bus bar and the third bus bar are at least partially enclosed by a housing, such that the first and third bus bars are inserted and removed in tandem;

the housing of the first bus bar and the third bus bar includes a second half of the second retainer, and

when the first and the third bus bars are inserted into the first portion of the second receptacle of the first and the third connector assemblies, respectively, the second half of the second retainer engages the first half of the second retainer to positively retain the first and the third bus bars to the first and the second connector assemblies.

19. The connector of claim 13 wherein the second receptacles of both the first and the second connector assemblies extend from one of a top surface, a front surface, and a rear surface of the power converter.