CN204010952U

CN204010952U - marine transformer iron core

Info

Publication number: CN204010952U
Application number: CN201420364599.2U
Authority: CN
Inventors: 殷荣明; 王成军
Original assignee: Kang Shibo Marine Electrical (jiangsu) Co Ltd
Current assignee: Kang Shibo Marine Electrical (jiangsu) Co Ltd; Kongsberg Maritime China Jiangsu Ltd
Priority date: 2014-07-02
Filing date: 2014-07-02
Publication date: 2014-12-10
Anticipated expiration: 2024-07-02

Abstract

The utility model discloses a kind of marine transformer iron core, seven one folded closed loops that form iron core of the longitudinal ladder of silicon steel sheet, by every, lower floor to upper strata silicon steel sheet length reduction 3-5mm, every silicon steel sheet length reduction is according to the every wide decision of sheet.The utility model has the advantages that the core structure that adopts longitudinal seven grades of stepping seams, magnetic by reduction seam crossing is close, reduces no-load loss, no-load current and noise, and no-load loss on average reduces by 15%, no-load current on average reduces by 35%, and seven one folded can significantly improve operating efficiency.

Description

Marine transformer iron core

Technical field

The utility model relates to a kind of transformer iron-core structure.

Background technology

The lamination mode that existing marine transformer iron core generally adopts horizontal secondary seam to replace, as shown in Figure 1, it is few that the advantage of this lamination mode is processed sheet type exactly, is applicable to situation about being simply equipped, shear precision is low; Meanwhile, adopt two one and fold to improve lamination personnel's operating efficiency, instead of adopt control loss, the folded mode of the better a slice one of noise, this is all to sacrifice transformer performance as cost.

Utility model content

Utility model object: for the problems referred to above, the purpose of this utility model is to provide a kind of marine transformer iron core that can improve lamination operating efficiency and can reduce again no-load loss, no-load current and noise.

Technical scheme: a kind of marine transformer iron core, seven one folded closed loops that form iron core of the longitudinal ladder of silicon steel sheet, by every, lower floor to upper strata silicon steel sheet length reduction 3-5mm.

Every silicon steel sheet length reduction is according to the every wide decision of sheet: for the wide 100mm that is not more than of sheet, every length is reduced to 3mm; Be wider than 100mm and be not more than 150mm for sheet, every length is reduced to 4mm; Be wider than 150mm for sheet, every length is reduced to 5mm.

Every silicon steel sheet oblique angle is 45 °.

Beneficial effect: compared with prior art, the utility model has the advantages that the core structure that adopts longitudinal seven grades of stepping seams, magnetic by reduction seam crossing is close, reduce no-load loss, no-load current and noise, no-load loss on average reduces by 15%, no-load current on average reduces by 35%, and seven one folded can significantly improve operating efficiency.

Brief description of the drawings

Fig. 1 adopts horizontal secondary seam to replace the marine transformer core structure schematic diagram of lamination mode;

Fig. 2 is the utility model core structure schematic diagram;

Fig. 3 is the upper yoke transverse sheet slab organization schematic diagram in Fig. 2;

Fig. 4 is the middle column sheet shape structural representation in Fig. 2;

Fig. 5 is the side column slab organization schematic diagram in Fig. 2.

Embodiment

Below in conjunction with the drawings and specific embodiments, further illustrate the utility model, should understand these embodiment and only be not used in restriction scope of the present utility model for the utility model is described, after having read the utility model, those skilled in the art all fall within the application's claims limited range to the amendment of the various equivalent form of values of the present utility model.

As shown in accompanying drawing 2-5, a kind of marine transformer iron core, each closed loop of this iron core is longitudinally superposeed by seven silicon steel sheets, and to form ladder folded, by every, lower floor to upper strata silicon steel sheet length reduction 3-5mm, size reduction is according to the every wide decision of sheet: for the wide 100mm that is not more than of sheet, every length is reduced to 3mm; Be wider than 100mm and be not more than 150mm for sheet, every length is reduced to 4mm; Be wider than 150mm for sheet, every length is reduced to 5mm.

Every oblique angle is 45 °, laminate patch coefficient 0.97, and when cap liner is placed, to stretch out core length identical at two ends;

Longitudinal seven seam iron cores are than horizontal secondary seam iron core, and its seam construction, by reducing the close Bg of magnetic of iron core seam crossing, reduces no-load loss, no-load current and noise.The close Bg=[δ of magnetic 2N/ δ 2 (N-1) of seam crossing] B, wherein N represents seam number, can draw the close multiple relation with number of steps of magnetic by this formula, as shown in the table:

Number of steps	2	3	4	5	6	7
							The close Bg/B of magnetic	1.41	1.06	0.94	0.88	0.85	0.82

From then on can find out, the iron core of longitudinal seven steppings is with respect to the iron core of horizontal secondary seam, the close 0.59T that reduced of magnetic, and the close value of magnetic of seam crossing has obtained effectively reducing.The no-load loss of bringing thus on average reduces by 10%, and no-load current has reduced by 35%.

The noise of transformer is mainly derived from the magnetic hysteresis of silicon steel sheet and stretches, and causes the vibrations of iron core, thereby produces noise.Adopt seven seam core structures, due to close reduction of magnetic of seam crossing, the magnetic hysteresis loss of seam crossing is effectively reduced, thereby reduced noise.

From the effect of theoretical and actual use, longitudinal seven grades of stepping seam iron cores of the present utility model are all very obvious in the reduction of the aspects such as no-load loss, no-load current and noise, and the closed assembly speed of iron core is also greatly improved, the upper yoke member process of pulling out, insert of cover coil also becomes simpler, only need to operate according to each number of steps just passable, its energy-saving effect highly significant.

Claims

1. a marine transformer iron core, is characterized in that: seven one folded closed loops that form iron core of the longitudinal ladder of silicon steel sheet, and by every, lower floor to upper strata silicon steel sheet length reduction 3-5mm.

2. marine transformer iron core according to claim 1, is characterized in that: every silicon steel sheet length reduction is according to the every wide decision of sheet: for the wide 100mm of being not more than of sheet, every length is reduced to 3mm; Be wider than 100mm and be not more than 150mm for sheet, every length is reduced to 4mm; Be wider than 150mm for sheet, every length is reduced to 5mm.

3. marine transformer iron core according to claim 1, is characterized in that: every silicon steel sheet oblique angle is 45 °.