JPS58154360A - Air gap winding type rotary electric machine - Google Patents

Abstract

PURPOSE:To rigidly hold a stator coil to a circumferential direction by inserting an insulating key into an axial keyway formed on the inner periphery of a magnetic shield and a keyway formed on an insulating spacer arranged between the coils. CONSTITUTION:A plurality of stator coils 4 are disposed on the outer peripheral side of an insulating inner cylinder 3, an insulating spacer is filled between the coils 4, and an insulating retainer 5 is contacted with the outer periphery of the coil 4, thereby forming a coil assembly, which is disposed on the inner periphery of a magnetic shield 11, and fixing means for radially pressing the coil 4 such as a wedge 8 is provided between the shield 11 and the retainer 5. A plurality of axial keyways 11a are formed on the inner periphery of the shield 11, a keyway 12a is formed on the outer periphery of an insulating spacer 12 corresponding to the groove 11a, and an insulating key 13 is inserted between the keyways 11a and 12a.

Description

Detailed Description of the Invention This issue relates to an air-gap winding rotating electric machine in which a stator coil is attached to the inner periphery of the magnetic shield on the stator side without slots. With the development of superconducting rotating electric machines, air-gap winding with slotted t-shaped comb stator coils installed on the stator side has come to be adopted.Features of air-gap winding rotating electric machinesStile, identifer core Since there are no teeth in the slots, the air gap ILK stator coils are arranged to increase the space factor, making effective use of the empty spaces, and also making it possible to increase the magnetic flux density of the stator coils. In particular, it becomes difficult to hold the foot coil.

The air gap winding rotary electric machine of this type according to the prior art is shown in Figures 1 and 3 as a longitudinal V# view and an enlarged front sectional view of the air gap winding part. etc. [A magnetic shield formed by laminating many sheets into a single cylindrical shape, with end plates at both ends (
It is held in place by an illusion, and is held by a circular stator frame (not shown).The inner peripheral surface is circular and has no slot 61! llj[A thin-walled insulating cylinder shaped to surround the outer circumference of the rotor (9) at intervals, made of, for example, epoxy resin glass fiber material or epoxy resin glass cloth material, and wrapped in a cylindrical shape. In the case of three-layer winding, there are multiple stator coils arranged on the outer circumference of the insulated inner cylinder (3) at [An insulating press plate applied to the outer periphery of each stator coil (4), which is divided into a plurality of parts in the circumferential direction and made of, for example, an epoxy resin glass cloth laminate (611'! The interlayer ll!I edge plate inserted between the upper opening (4a) and the lower opening (4b), (1) each stator coil (4
) is an insulating spacer packed between, (S) is a magnetic shield i
A pair of tapered key-shaped wedges are driven in the axial direction between the inner circumference of the l+ and the insulating holding plate tit, and the 7-
It is divided and the joint direction of both sides is formed at a slope. In the example shown in the figure, it is divided into two sets in the axial direction, and is arranged all around the circumference in the circumferential direction. - to the wedge (8),
The stator coil (4) is made of an insulating material with high mechanical strength and is driven in the uniaxial direction to generate compressive force in the radial direction, thereby fixing the stator coil (4) by pressing it.

By the way, 1L magnetic force in the circumferential direction is generated in each stator coil (41) by energizing the frame.This electromagnetic force becomes stronger as the capacity of the frame increases. There was a risk that the receiving and holding of the stator coil in the circumferential direction by the electronic coil would not be sufficient. - If the electronic coil moves in the circumferential direction, each insulator will be damaged, leading to an accident.

In this invention, an axial keyway is provided on the inner periphery of the magnetic shield, and among the insulation spacing pieces arranged between the constant coils, an upper part of the insulation spacing piece at the position of the keyway is opposite to the keyway. Key groove [provided, insert the insulating key in the axial direction between both key grooves, and stator coil s1! -With respect to the circumferential direction! i! The purpose of the present invention is to provide an air gap winding rotating electrical machine which is held in an IFM. In the figure, 617,131~kan*(4m)-(4b) are the same as those of the prior art described above. Q〃 is a magnetic shield formed in a cylindrical shape and held in a stator frame (not shown).The inner circumference IIi of this magnetic shield (6) has no slots, but the axial direction The key @(lla
) are arranged at multiple locations in the circumferential direction. (2)
A plurality of insulating spacing pieces arranged between the magnetic shield (6) and the key #I (11,) and fitted between the stator coils 14], and a key opposite to the key @ (l1m) in the upper middle part. A groove (1 mm) is provided in the axial direction and is made of the same material as the above-mentioned IIAkk spacing piece (1).

In Q&L, both of these keys # (lia) t (12
m) II was firmly inserted in between! 5-Edge key key - Made of an insulating material with high mechanical strength, such as an epoxy resin glass cloth laminate.

As mentioned above, the magnetic shield Ql) and the insulating spacing piece (b)
By coupling the and tS edge keys with ``,'' movement of the stator coil (4) in the circumferential direction due to electromagnetic force is prevented. FIG. Insert the magnetic shield (b) key # (l) in Q4.
1m) and +-#I (l1m) of the insulating spacing piece (2).It consists of a pair of tapered keys (14m), and is split in the thickness direction to connect both sides. The joint surface is formed in a slope. Tapered key (14m) with great mechanical strength! Taper key (14a) for one pair of O made of insulating material, e.g. epoxy resin glass cloth laminate.
, key grooves (11,, a), and (Hlm) are tightly coupled to each other in the circumferential direction to form a tight and strong connection. In addition, by adjusting the driving amount of the taba key (14jL), you can achieve an appropriate surface pressure, and you can easily fine-tune the surface pressure during disassembly and reassembly or repair inspection. nOh, in the above example, the key fj# (l1m) *
(l1m) and both 42! The stator coils (4) are arranged every two stator coils (4) in the circumferential direction on the L edge key (B) or the stile σ◆, but p may be increased or decreased according to the required lN. In this example, the case where the stator coil 1411 is pressed against the magnetic shield 113 using rust (9) is shown, but it can also be applied when using other fixing means that press in the radial direction. It is.

As described above, according to the present invention, an axial key groove t is provided on the inner circumference of the magnetic shield, and a key #I facing the key groove is provided on the upper part of the insulating spacing piece at a position relative to the key groove, Since an insulating key is inserted between both key grooves and the two are connected, the stator coil can be firmly held in the entire circumferential direction.

[Brief explanation of the drawing]

Fig. 111 is a vertical sectional view of the air gap winding part showing the air gap winding rotating electric machine according to the prior art, and Fig. 2 is an enlarged # side view taken along line 1-11 in Fig. 1.
! ! FIG. 3 is an enlarged cross-section 111g corresponding to FIG. 2 of the air gap winding part showing an air gap winding rotating electric machine according to an embodiment of the present invention. Enlargement of the part corresponding to FIG. 3 showing another embodiment of the invention at 41m:
1 sectional view 03... Insulating cylinder, 4... Stator coil, 7... Insulating spacing piece, 8... Wedge, 11...
・Magnetic shield, 11@...Keyway, 12...Insulation spacing piece, 12&...Keyway, 13...Insulation key, 14
...Insulated key, 14m...Tapered key. In addition, the same or equivalent parts are indicated by the same reference numerals in the figure. 〇Representative Kuzuhiki- (1 other person): Written amendment to the procedure (voluntary) 1. Incident display Special application Showa'F-a Fromaro 4#
3. The person making the amendment 6. The person writing the "detailed description of the invention" of the specification to be amended. 6 Contents of amendment (1) Change “in the thickness direction” to ’” in the 4th line of page 6 of the specification.
Correct it in the circumferential direction. (2) "<Rust (-)" on page 6, line 20 of the specification
” is corrected to “wedge (8)”. Above 1'J...

Claims (1)

[Claims] il+ A plurality of stator coils are arranged on the outer periphery of an insulating inner cylinder, an insulating spacing piece t is fitted between these stator coils, and a magnetic shield is placed on the inner periphery side of this assembly tm, A fixed foot means for pressing in the radial direction is disposed between the inner peripheral part of the magnetic shield and the outer peripheral side of each of the stator coils, and the stator coil S
In the T-fixed 1i13i electric converter, axial keys #I are arranged at multiple locations in the circumferential direction on the inner circumference of the magnetic shield, and insulation is provided at a position relative to the key length among the insulation spacing pieces. A spacer piece is provided with an axial key body opposite to the above-mentioned key groove in the upper part, and an insulating key is placed between the two key grooves, and they are connected to each other in the circumferential direction.
An air-gap winding rotating electric machine that generates mold and mildew consists of an insulated key divided into eight parts in the circumferential direction and a pair of insulated taper keys that are driven in the axial direction. Air-gap winding rotating electric machine as described in section.