Modular reconfigurable polyphase power transformer
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H01F-017/04
H01F-030/12
H01F-027/02
H01F-027/28
H02P-025/18
H02P-013/00
H01F-030/14
출원번호
US-0053666
(2011-03-22)
등록번호
US-8836462
(2014-09-16)
발명자
/ 주소
Curiac, Radu Stefan
출원인 / 주소
Siemens Industry, Inc.
인용정보
피인용 횟수 :
1인용 특허 :
5
초록▼
An AC transformer having a cylindrical core configurable for single or polyphase power input and/or output transformer applications. The transformer core structure is capable of being configured to provide for single or polyphase inputs or outputs by varying the transformer primary and secondary win
An AC transformer having a cylindrical core configurable for single or polyphase power input and/or output transformer applications. The transformer core structure is capable of being configured to provide for single or polyphase inputs or outputs by varying the transformer primary and secondary winding configurations. A polyphase input configuration can be utilized in polyphase output transformers, such as for variable frequency drive (VFD) applications. Additional methods for winding transformer cores minimize the quantity of core winding wire necessary for transformer manufacture.
대표청구항▼
1. A transformer, comprising: a housing enclosing therein: a first module including a stationary primary core, wherein the primary core includes a cylindrical outer circumference defining a plurality of axially oriented primary slots;a second module including an annular shaped stationary secondary c
1. A transformer, comprising: a housing enclosing therein: a first module including a stationary primary core, wherein the primary core includes a cylindrical outer circumference defining a plurality of axially oriented primary slots;a second module including an annular shaped stationary secondary core, wherein the secondary core includes a cylindrical inner circumference defining a plurality of axially oriented secondary slots, and wherein the first module is assembled into the second module such that said inner circumference is concentrically oriented about the primary core outer circumference;at least one phase primary winding oriented within the primary slots, for coupling to a phase of alternating current input power;at least one phase secondary winding oriented within the secondary slots, inductively coupled to the at least one phase primary winding, for generating a separate phase of alternating current output power wherein the primary and secondary windings are prefabricated before the first module is assembled into the second module. 2. The transformer of claim 1, further comprising a plurality of separate sub-windings within the primary winding oriented within the primary slots, each for coupling to a separate phase of alternating current input power. 3. The transformer of claim 2, further comprising: a first plurality of separate sub-windings within the secondary winding oriented within the secondary slots, each of said sub-windings inductively coupled to one of the plurality of phase primary sub-windings;a second plurality of separate sub-windings within the secondary winding oriented within the secondary slots, each of said sub-windings inductively coupled to another of the plurality of phase primary sub-windings; andeach of said secondary sub-windings for generating a separate phase of alternating current output power. 4. The transformer of claim 1, further comprising a plurality of separate sub-windings within the secondary winding oriented within the secondary slots, each of said sub-windings inductively coupled to the at least one phase primary winding, each of said secondary sub-windings for generating a separate phase of alternating current output power. 5. The transformer of claim 1, wherein at least one of the windings defines a symmetrical distributed winding pattern having a plurality of separate closed-loop sub-windings arranged in a sequential pattern wherein a loop of a subsequent sub-winding shares a slot with a return portion of a loop of a prior sub-winding wherein said sub-windings are coupled in parallel, each sub-winding skipping an equal number of slots. 6. The transformer of claim 5, wherein the winding pattern on a core respectively defines a symmetrical distributed winding pattern having a plurality of separate closed-loop sub-windings arranged in a sequential pattern wherein a loop of a subsequent sub-winding shares a slot with a return portion of a loop of a prior sub-winding wherein said sub-windings are coupled in parallel, each sub-winding skipping an equal number of slots. 7. The transformer of claim 6, further comprising three primary phases and nine secondary phases. 8. The transformer of claim 1, wherein each respective core defines an equal number of respective slots. 9. The transformer of claim 1, wherein the primary and secondary slots are radially offset relative to each other. 10. The transformer of claim 1, wherein the primary core defines fewer slots than the secondary core. 11. The transformer of claim 1, further comprising three primary phases and nine secondary phases. 12. The transformer of claim 1, wherein at least one of the windings defines a symmetrical continuous winding pattern about its respective core wherein at least one winding includes a sub-winding and wherein each coil loop of said sub-winding is formed by wrapping a single wire strand multiple turns around two adjacent slots and then skips a plurality of slots before repeating said winding pattern. 13. The transformer of claim 12, further comprising three primary phases and nine secondary phases. 14. The transformer of claim 1, incorporated in a variable speed drive system comprising: a three phase alternating current power source coupled to the transformer primary core;a nine phase alternating current power output coupling the transformer secondary core and a variable frequency drive controller input; anda three phase alternating current motor coupled to an output of the controller. 15. A polyphase transformer, comprising: a housing enclosing therein: a stationary primary core, having a cylindrical outer circumference defining 18 axially oriented primary slots;an annular shaped stationary secondary core, having a cylindrical inner circumference defining 27 axially oriented secondary slots, concentrically oriented about the primary core outer circumference;a primary winding having three sub-windings oriented within the primary slots, respectively for coupling to a phase of alternating current input power, all three sub-windings respectively defining a symmetrical continuous winding pattern about the primary core through two adjacent primary slots and then skipping a plurality of slots before repeating said respective winding pattern; anda secondary winding having nine sub-windings oriented within the secondary slots, inductively coupled to one of the primary sub-windings, for generating a separate phase of alternating current output power, all nine secondary windings respectively defining a symmetrical continuous winding pattern about the secondary core through two adjacent secondary slots and then skipping a plurality of slots before repeating said respective winding pattern.
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이 특허에 인용된 특허 (5)
Dooley, Kevin Allan, Architecture for electric machine.
Dhyanchand P. John (Rockford IL) Vaidya Jayant (Rockford IL) Mokadam Rajhunath (Rockford IL) Arbanella Richard (Rockford IL), Electromagnetic transformer.
Grozinger Alfred (Stuttgart DEX) Frister Manfred (Schwieberdingen DEX) Kreuzer Helmut (Schwieberdingen DEX), Method for winding the stator in a three phase AC machine.
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