JPS5999945A - Separable magnetic core for electric machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to electromechanical engineering, and more particularly, the invention relates to separable magnetic cores for electrical machines.

The invention can be used in non-salient pole AC electric machines.

Known separable magnetic core for electrical machines (U.S. Pat. No. 398
No. 343, published in 1976) consists of a yoke wrapped in ferromagnetic material or strips and teeth or sections made of corrugated bands. The slots in the teeth open into the internal bore of the active or operating clearance of the electromechanical stator. For slots that open toward the active gap, the power rating of the stator has a significant influence. The teeth in contact with the inner diameter of the yoke with a change in height exhibit a "fluid" structure in mechanical terms, and the thickness corrugates due to the gold mechanical load applied to this tooth. Unpleasant changes in band thickness or concentration at joint points. - Following the assembly of the air core, operations have to be carried out to remove the corrugation tips, which is completely undesirable for mass production of electrical machines and increases manufacturing costs.

Furthermore, the known separable hunting core for electrical machines (see USSR Invention Document No. 584392, published in 1978) is a cocoon-shaped core made of a yoke and a corrugated band with slots extending μi-l towards the yoke. 1] of the corrugated band is equal to the length of the separable mountain core.

In this known magnetic core, the magnetic flux coming from the active gap enters the waveform (tooth), passes through the electric frog 1 along the parallel low path (waveform ring), and slides toward the yoke. When the tip of the corrugation is encountered, it becomes supersaturated, so that in this area the low bed density is 2.1-2.5T.
and turns into a maizuzan. In this way, the permeability of the rJ1 plane at the tip of the waveform is ',::i? In this area of the magnetic core, the magnetic resistance increases sufficiently and the magnetic flux begins to dissipate. Due to supersaturation, the lull enters the gap between the teeth and the yoke in a dissipated state, and this gap is unnaturally enlarged.Thus, the Yamaki core of Doro is affected by the high loss in the steel. The increase in the inductance value in the toothed portion will result in an increase in the loss in the individual.It will also increase the porosity at the tip of the corrugation ψfra.
This porosity affects the efficiency of the machine as a whole.

[] The purpose of this invention is to reduce the dissipation flow of the main magnetic flux, and to
A possible to reduce skewers and increase the efficiency of electrical machines V
The object of the present invention is to create a separable iron core for low-pressure machinery having C-shaped teeth.

(The second object consists of a yoke and a toothed part with a slot for receiving a winding, which is opened towards the yoke and is open towards the yoke, and is made of a separable core. Length VC
According to the invention, the corrugated band has a rectangular cutout defining a channel made on one of its edges and accommodating the yoke. , is achieved by making the depth and width of this rectangular cutout (6) correspond to the length of the magnetic core of the yoke and the width of the yoke, respectively.

This release E! A) To reduce the losses in the toothed steel and reduce the porosity, the efficiency of the electrical machine can be increased.

This invention is further deceptively described in connection with the embodiment VC of this invention F!1 in the accompanying drawings, with reference to which:

In the drawing, a yoke 1 (Fig. 1) and a corrugated band (C nrrll
lTa-ted 1. +and) made from 3,
A toothed area with a winding 5 receiving slot 4 open towards the yoke 1.
or zone) (referred to as y lower 1st tooth)
Consists of 2. The corrugated band 3 is made of one of the navy blue parts and has a rectangular removed part that limits the yoke that accommodates the yoke.
6 and is. The length of the removed section 6 is equal to the length of the core of the yoke, while the width of the removed section 6 is equal to the length of the yoke 1
equal to the width of The cutout 6 extends between the tooth 7 of the circular part 2 and the bridging strip 8.

According to this structure of the electromechanical core, it is possible to reduce the K
This is because it engages with yoke 1 through the hoe. Waveform band 3
The yoke 1, housed internally in the winding 5 Vc, can be surrounded by a winding 5 Vc, which corrugated band 3 improves the conditions for magnetization reversal, and eventually some windings 4. Generates savings on fl fees. The wavy ribbing on the yoke 1 and the air gap on one side of the yoke 1
It has a flat surface in order to reduce the amount of heat generated by the stain, thereby improving the power rating of the stain removal machine.

Illustrated in FIG. 3 of the accompanying drawings is a portion of the separable magnetic core of an end-feed+1 electric machine.

The circular part 2 is made of a ferromagnetic band 9 (Fig. 4),
This strip is divided along line 10 into two congruent strips 11 and each strip is corrugated to produce a corrugated strip. For the purpose of waveform work, they have a rotational relationship of 180 degrees to each other @
Tip 12 for arranging the waveform riff with the contacting tab
(apex).

In the case of a cylindrical electrical machine, the teeth 2 (FIG. 1) are cylindrically shaped and the yoke 1 has a limited channel Vclfv recess to be abutted on the teeth 2. It will be done. In this case, the wavy band 31″T has two functions:
4f, its inner part (with respect to the yoke) is toothed ζ', and its outer part (with respect to the yoke) provides cooling ribs.

In this case, the bridging strip 8 also acts as a heat transfer medium,
Heat is transmitted from the planar portion 2, which includes the winding 5, to the cooling ribs through this sheath.

The casing of the 11 air machine is no longer needed, and the machine can be made with 8 types.

In the case of an electric machine (/c), the yoke 1 (third stage) is surrounded by a toothed part 8, the ends of which are connected to the phase 1g.

The end loop-shaped foundation 1 machine column tends to exhibit significant stress strain in the magnetic core due to the -flux action, and this strain is accompanied by the rotor against the stator.
ess ) It is common knowledge that this causes J.

The structure detailed herein eliminates any eventual stress strain on the magnetic core, since the undulating lips radially extend the electrical power directed across the laminations of the yoke (silk 2). It is itself connected to the other toothing 2 by a bridging strip 8, which contacts the other toothing of the latter opposite the yoke 1 and connects the former toothing to an opposing magnetic core (this 15, of a magnetic machine). This is because it prevents it from pulling against the stator or rotor.

Squirrel-cage rotor phase separation possible, when making a magnetic hump, it is first connected to the teeth 2 (Fig. 3) or the yoke 1, and then the slots 4 are filled with squirrel-cage windings (not shown). .

According to this invention, the power rating of the electrical mechanism can be increased.

[Brief explanation of drawings]

1 shows a portion of a separable magnetic core of a stator according to the invention; FIG. 2 is a sectional view taken along line II-II IL of FIG. 1; FIG. FIG. 4 shows a section of a magnetic core for an end-mounted electrical machine according to the invention in a perspective view; FIG. 1: Yoke 2: Thread 3: Corrugated band 4 Nice slot 5: Curtain line 6: Rectangular deleted part 7: Tooth 8: Ringing strip 9: Ferromagnetic body 10: Segmented 1 gland 11: Combined body 12 :Aya Sato, patent attorney and representative for the applicant
Power (1 other person) / f/Ii2

Claims (1)

Claims: A yoke (1) and a toothed part (4) made of a corrugated band (3) and provided with a slot (4) for receiving a winding (5) which is open towards the yoke (1). 2), in which the width of the corrugated band (3) is equal to the length of the separable magnetic core, the corrugated band (3) is made on one of its edges and the yoke (1) Rectangular deletion part (6) that limits the channel that accommodates the
and the depth and width of the rectangular removed portion (6) are equal to the length of the magnetic core of the yoke (1) and the width of the yoke (1). core.