Patent Application
20220294314
The present disclosure relates generally to electrical machines and more particularly to alternating current (AC) housings for rotating rectifier assemblies for generators.
Some rotating rectifier assemblies utilizes a multi-piece AC (alternating current) housing connection block as the interface between the exciter armature and the rotating rectifier assembly. Prior to this disclosure, existing designs require the use of three threaded inserts, three preformed packings (o-rings), and a plastic housing component.
The conventional techniques have been considered satisfactory for their intended purpose. However, there is an ever present need for improved systems and methods for more efficient AC housing connections. This disclosure provides a solution for this need.
An assembly comprises an AC (alternating current) housing connection block and a plurality of inserts seated in the AC housing connection block, wherein for each of the inserts, an interface between the insert and the housing is continuous. The interface between each insert can define a cylindrical surface. The interface can be devoid of any seal ring sealing between the insert and the AC housing connection block.
Each of the inserts can be threaded internally for receiving a connector to electrically connect the AC housing connection block to a rectifier. The inserts can be entirely of brass and the AC housing connection block can be entirely of a polymer material. Both the AC housing connection block and the inserts can be entirely free of Beryllium Copper (BeCu).
Each of the inserts can be mirror-image symmetrical with itself in an axial direction. One end of the AC housing connection block can define an alignment feature configured to ensure mating components are properly aligned for cooling flow. The AC housing connection block can be electrically connected to a rectifier in a brushless generator.
A method comprises inserting a plurality of inserts into a mold, and molding an AC (alternating current) housing connection block. The method can include machining threads into each of the inserts. The method can include aligning the AC housing connection block with a rectifier assembly and installing the AC housing connection block into the rectifier assembly. Aligning the AC housing connection block can include aligning an alignment feature of the AC housing connection block with a respective feature of the rectifier assembly.
These and other features of the systems and methods of the subject disclosure will become more readily apparent to those skilled in the art from the following detailed description taken in conjunction with the drawings.
So that those skilled in the art to which the subject disclosure appertains will readily understand how to make and use the devices and methods of the subject disclosure without undue experimentation, embodiments thereof will be described in detail herein below with reference to certain figures, wherein:
Reference will now be made to the drawings wherein like reference numerals identify similar structural features or aspects of the subject disclosure. For purposes of explanation and illustration, and not limitation, a partial view of an embodiment of a system in accordance with the disclosure is shown in
Shown in
Referring now to
In embodiments, each of the inserts 104a,b,c can be threaded (e.g. threads 107) internally for receiving a respective connector to electrically connect the AC housing connection block 102 to the rectifier assembly 10. The inserts 104a,b,c can be entirely of brass and the AC housing connection block 102 can be entirely of a polymer material. Both the AC housing connection block 102 and the inserts 104a,b,c can be entirely free of Beryllium Copper (BeCu). BeCu is classified as a dangerous material for machining, therefore machining conventional inserts made of BeCu required compliance with health and safety regulations. Elimination of BeCu from the assembly 100 removes the additional compliance requirements, as well as provides for a safer manufacturing environment.
Each of the inserts 104a,b,c can be mirror-image symmetrical with itself in an axial direction, across axis A. One end 108 of the AC housing 102 connection block can define at least one alignment feature 110 configured to ensure mating components are properly aligned for cooling flow. For example, the housing 102 can include protrusion 118 configured to engage a corresponding recess (not shown) in rectifier assembly 10.
Shown in
The methods and systems of the present disclosure, as described above and shown in the drawings, provide for decreased complexity in assembly, reduced manufacturing cost and compliance requirements, eliminates the need for preformed packings (reducing leakage paths) and increased dielectric strength and creepage distance. While the apparatus and methods of the subject disclosure have been shown and described, those skilled in the art will readily appreciate that changes and/or modifications may be made thereto without departing from the scope of the subject disclosure.
