JPS61124259A - Linear motor device - 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 [Industrial Field of Application] The present invention relates to a linear motor device, and particularly to a linear motor device equipped with air cooling means.

[Prior art and its problems]

The principle of a linear motor is well known and basically consists of a ply member and a secondary member. One member is fixed and power is supplied to the primary member to induce an electromotive force in the secondary member.
generate relative motion between two members. using this method,
Motion can be obtained without the need for torque transmission devices such as those used in conventional motors.

It has been proposed to use linear motors in a wide range of applications, and we created such a motor as one of the uses. However, despite considerable research and development into such motors for this particular application, their widespread use in the field of transportation has been limited. One problem encountered with the use of linear motors in such transportation applications is that energy is converted into heat by the motor, and there are problems associated with the removal of this heat.

The primary member of such motors usually consists of a core with electrical windings. The winding has a number of coils, each coil having a loop-like end winding projecting laterally from the core. These endwindings are closely spaced and cause most of the energy to be dissipated in the form of heat. At the same time, when such linear motors are operated in the transportation field, it is necessary to protect the end windings of the coils from the harsh environment, so that it is necessary to fit a cover surrounding these end windings. However, this often results in abnormally high temperatures occurring inside the cover, impeding cooling. This in turn requires that the coils be provided with high-grade electrical insulation in order to obtain a satisfactory life of the motor, which in turn reduces the endwinding by reducing the spacing between each adjacent coil. This became another obstacle to cooling. Therefore, the reliability of linear motors intended for the above-mentioned special applications has been unacceptable due to thermally induced defects in electrical insulation and motor winding.

[Purpose of the invention]

The present invention aims to provide a linear motor device equipped with air cooling means that eliminates or reduces the above-mentioned conventional disadvantages.

[Structure of the invention]

To achieve the above object, the present invention has, as a first means, an elongated core, a plurality of turns spaced apart from the core, and extending laterally; a motor winding, each turn having an end winding projecting from opposite ends of the core and including a knuckle portion for reversing the direction of the winding; and a motor winding extending along the core on at least one side and surrounding the end winding. A linear motor device is constituted by a pair of side cover assemblies and a plurality of fans disposed outside both ends of the core to introduce air through the side covers and cool the end winding.

As another means of achieving the above object, the present invention also provides a frame having a pair of spaced apart parallel frame members, a core disposed between and supported by the outer frame members, and a core retained by the outer core and supported by the outer frame members. comprising a plurality of turns disposed at predetermined intervals along the core and extending in the transverse direction;
for covering motor windings and end windings, each of said turns including a pair of parallel portions supported by said core and further having knuckle portions projecting at opposite ends beyond said core and reversing the direction of winding; a pair of side cover assemblies extending along the core on either side, and a cooling device for cooling the core and windings, the cooling device extending from the frame member to take heat from the core. A linear motor device is constituted by a core cooling means disposed between the core cooling means and a winding cooling means disposed outside the frame member on either side or both sides of the frame member in order to take heat from the end winding. It's Shitachino.

〔Example〕

Hereinafter, the present invention will be described in detail based on an embodiment shown in the accompanying drawings.

In FIG. 1, a vehicle 10 is supported on a track 12 guided by a rail trunk 14. In FIG.

The track 12 moves a primary member 16 of a linear motor powered from a way sight rail 18 through a pin up 20. Secondary
A member 22 (commonly referred to as a reaction rail) is disposed below the primary member 16 and between the rails. That is, in the illustrated embodiment, one reaction rail is connected to a pair of opposing primary members 16.
placed between. Applying power to the primary member 16 generates a thrust between the reaction rail 22 and the primary member 16 that moves the vehicle 10 along the rail 14.
promote.

The details of the primary member 16 of - are best shown in FIG. Primary member 16 is core 2
6 is supported by a frame 24. The winding 28 is disposed on the core 26 and
Projects laterally on both sides. The side cover assembly 30 is provided above the frame 24 and surrounds a winding portion that protrudes from the core 26 in the transverse direction.

Frame 24 is best represented in FIGS. 3 and 5. Frame 24 is comprised of a pair of spaced parallel frame members 32, 32 extending between a front end plate 34 and a rear end plate 46. Each end plate 34 , 46 extends above and below the frame member 32 , with the upper horizontal 1i 236 projecting outwardly of the end plate 34 . A skirt 38 also extends vertically from the upper horizontal plate 36 to form a housing 40. housing 40
A pair of scraping blades 42 are fixed to the hollow housing 40 at the bottom thereof and serve to remove dirt from the reaction rail 22. The lower horizontal plate 44 is the fifth
As shown in the figure, it has a skirt 48 that is welded to the rear end plate 46 and hangs vertically. Skirt 48 and end plate 46 partition a hollow housing 50 through which electrical cables are routed between opposite sides of the primary member.

A pair of suspension brackets 52.5 are provided on both sides of the frame member.
4 is the rear end plate 46 and the front end plate 3
4 are arranged adjacent to each other. These suspension bracket throats 52,54 are cast and the bracket 52 has a pair of longitudinally extending webs 56 each mounted with a spherical bearing 58. The bracket 54 also extends between the frame members 32 and projects from either side of the frame member 32, and typically has transverse webs 60. A spherical bearing 62 holds the web 6 between the frame members 32.
Bearings 64 , 66 , which are mounted on the frame member 32 and similar to the spherical bearings 62 , are mounted on the web 60 on either side of the frame member 32 . hair ring 58.62
．． 64,66 provide suspension points for connecting the frame and primary member 16 to the underside of the track 12.

Thrust from the primary member to the vehicle is transmitted through brackets located between frame members 32. The bracket 68 has vertical clevises 70 connected to appropriate points on the truck for transmitting thrust between the truck and the motor.

A plurality of outriggers 72 project laterally from the frame member 32, each outrigger 72 having a horizontal upper surface 74 and a pair of downwardly sloping lower surfaces 76, 78, and having a generally triangular needle shape. A stringer 80 is welded to the distal end of each outrigger 72 and extends generally parallel to the frame member 32 through the stringer 72. An angle member 82 is welded to the stringer 80 on the side opposite the frame member 32 and extends beyond the ends of the stringer 80 to the end plates 34,46. Angle member 82 receives side cover assembly 30.

An extension tube support member 84 is disposed at the junction of the lower surfaces 76,78 of the outriggers 72 and is welded generally parallel to the frame member 32 between the end plates 34,46. The support member 84 also supports the lateral portion of the winding extending beyond the core 26.

As shown in FIGS. 2 and 5-9, core 26 is comprised of a plurality of thin vertical plates 88 that extend generally parallel to frame member 32. As shown in FIGS. The vertical plates 88 are made of magnetic steel with an insulating coating on each surface. The vertical plate 88 is connected to the frame member 32.3.
2 and fixed to each other, and the connecting port 89
is secured to the frame member 32.32 by. Also, plates 88 each project below the lower end of frame member 32 and depend therefrom to form a plurality of transverse slots 9 .
It has a partition piece 90 that partitions the two. The lower end of the partition piece 90 is undercut to form a dovetail a94.

A portion of the winding 28 is fitted into each slot 92. The winding 28 consists of a number of coils 96 having a pair of parallel sections 98 interconnected by an end winding 100.

The end winding 100 has a bend as shown at 102 (see FIGS. 2 and 8), which acts as a knuckle to reverse the direction of the coil.

The parallel portions 98 fit into corresponding transverse slots 92 at regular intervals along the longitudinal axis. The plane of the coil 96 is horizontally inclined and each slot 92, except at the tip of the core 26, is fitted with a wedge 104 to retain in the slot 92 the parallel portions 98 of two coils 96 stacked on top of each other. It is equipped. The wedge 104 cooperates with the dovetail groove 94 to prevent longitudinal movement within the slot 92. Although not shown, in this embodiment, only one coil is held in the slot 92 at the tip of the core, and a filler block is used to hold the coil in the slot.

A pair of liners 106, 108 are disposed between the wedge 104 and the lower surface of the coils 96 to protect the insulation of each coil 96. Liner 106 has the product name N
The liner 108 is formed from a material sold under the trade name GLASTIC, and the liner 108 is formed from a material sold under the tradename GLASTIC.

The formation of the coil is best illustrated in FIG.

Each coil 96 is comprised of a plurality of turns of a conductor 110 having successive turns that are insulated from each other. The conductor 110 has a generally rectangular cross section and the successive turns overlap each other to form a generally rectangular cross section for the conductor. Each turn has a thickness of 5
ml of Dacron™ layer tape 116. The conductors 110 are stacked in two rows,
Partition member 1 made of the above NOMEX with a thickness of 20ml
Divided by 14. Also, 10ml of the above NO.
A pair of groove members 118, 120 formed from MEX material are placed from both sides surrounding the overlapping conductor 110, and two insulating layers are added to the top and bottom surfaces so that the entire assembly is a continuous layer of tape. space (pass
es) and half type? This method, wrapped in ml of polyglass tape, provides electrical insulation between adjacent turns and between adjacent coils in a compact manner.

Endwinding 100 projects laterally beyond frame member 32 with coil 96 retained in slot 92. As can be seen from FIG. 8, the end winding 100 is supported by an extension tube support member 84 having a Dacron (trademark) abutment member 121 on its lower side. Endwinding 100 is attached to support member 84 by wire 122 .
2 is wound around the support member 84, the abutment member 121, and the end winding 100. Dacron™ spacers 123 are placed between the coil endwindings to reduce knot vibration and associated support loosening and/or insulation wear.

In order to protect the end winding 100 that protrudes laterally of the coil 96, the side cover assembly 3 is installed.
0 is mounted along the length of the primary member and surrounds the end winding 100. This is best illustrated in FIGS. 4 and 8. Each side cover assembly 30 includes a lower cover 124 and an upper cover 1.
It consists of 26. One end of the lower cover 124 is supported by the ankle member 82, and the other end is supported by the wedge 1.
It is supported by the 04 notch. Upper edge 1 of lower cover 124
28 is curved outward to form a stiff rib, and a gasket T-130 is inserted between the angle member 82 and the bottom cover 124.

Holt 132 passes through lower cover 124 and through stringer 80 to secure lower cover 124.

That is, the lower cover 124 has a vertical portion 134 and a horizontal portion 13.
6, which are connected by a curved portion 138. The upper edge 128 of the vertical portion 134 is bent outward to form a rib 140 as described above, and the bolt 1
32 passes through the upper edge 128 and is screwed into the screw hole 142 of the stringer 80, and the upper edge 128 of the lower cover 124 is fastened to the stringer 80. The horizontal portion 136 of the cover 124 is recessed downward at both end edges as indicated by reference numerals 146 and 148. A gap 152 is provided in the lowered portion 150 between the recesses g+n46.148. A net 154 is installed inside the lowered portion 150 and covers the gap 152 to prevent foreign matter from entering.

The inner edge 156 of the horizontal portion 136 is secured in a notch 158 formed in the top surface of the wedge 104'. inner edge 15
6 is inserted between the liner 108 and the wedge 104 and is securely held without physically contacting the lower surface of the coil 96. The sealing pieces 159 shown in FIG. 4 are disposed inside both ends of the lower side cover to seal the abutting surfaces with the end plates 34, 46. Only one end of the wedge 104 has a notch 158 as best shown in FIG. Wedge 104 alternates notches 158 along the primary member with adjacent wedges projecting on either side of core 26. Thereby, both sides of the core 26 are supported with respect to each of the lower covers 124.

The upper cover 126 has a pair of inner and outer vertical flanges 160 and 162 that are connected to each other from the horizontal portion 164.
has. Gasket 166 connects outer vertical flange 16
2 and on the upper surface of the angle member 82. Bolts 168 pass through outer flange 162 and are secured to weld nuts 170 attached to the inside of stringer 80.

The inner vertical flange 160 is secured to the frame member 32 by a pole 172 that is threaded into a through hole 174 in the frame member 32. Gasket 176 is interposed between frame member 32 and inner flange 160 to seal top cover 126. The upper cover 126 does not span the entire length of the frame member 32, but is sized such that it stops short of the brackets 52,54. The end plates 178 seal the open end of the upper cover 126 and are supported by the outriggers 72 (see FIG. 4). The balance of the coil is maintained by the deck plate 180.

J Pig Desokif ``Rate 180 is set screw 18
2 to the outrigger 72 and end plate 44.

To cool the turns disposed within the side cover assembly 30, a winding cooling means shown in FIGS. 8 and 10-12 is used. Fan 183 is installed on horizontal portion 164 of top cover 126 between outriggers 72 . Each fan 183 is disposed below the gap 184 of the horizontal portion 164 and is fixed to the horizontal portion 164 by a bolt 186. The gap 184 is covered with an expander metal mesh 188 to prevent foreign matter from entering. Fan 183 is a commercially available unit available from Rotron and incorporates a heat-resistant device to prevent overheating of the fan motor, for example due to snow ingress, when the fan is installed. The fan 183
Air is taken in from 4 and sent to the end winding 100 of the coil 96. Air is then released through gap 152 in cover 124. A baffle in the form of an air dam 194 is disposed in the bend 138 (see FIG. 8) to guide air between adjacent end windings 100 rather than outside the end windings 100.

Air dam 194 is formed from a piece of synthetic rubber and is disposed over the entire length of lower cover 124 . The air dam 194 has sufficient spacing from the end coil to avoid contact with the end winding during operation, but close enough to ensure that air flow between the end coil and the air dam is restricted. . This spacing, typically 3 fl, has proven to be sufficient.

To cool the core 26, a pair of core cooling fan assemblies 196, 198 are mounted on the frame member 32.
32 on top of the core 26. Each core cooling fan assembly 196, 198 has a sheet metal bracket 200 and is attached to the frame member 3.
2 to guide air along the top surface of the core. Bolts 203 pass through spacer 204 through frame member 32 and enter holes in downwardly projecting flange 206 of bracket 200 . Each bracket 200 has a front extension 201 and a rear extension 202, respectively, which extend between brackets 52-68 and 88-54 to form a substantially continuous baffle over core 26. playing a role. This means that between the frame members 32, 32 the core 2
The effect is to cause air to flow along the line 6.

During operation of the primary member, the flow of electrical energy into the coil generates a thrust force between the primary and secondary members. As the energy of the coil warms up, the temperature inside the side cover assembly 30 increases. To prevent it from overheating, a fan 183 supplies air into the side cover assembly 30 and is guided by an air dam 194 between adjacent coils of the winding 28. This effectively maintains the temperature within the side cover within reasonable limits. Although the heat generated in the core zone tends to be lower than the heat generated in the end windings of the coil,
Core cooling means constituted by fans 196 and 198 effectively cools core 26 .

In the illustrated embodiment, the primary members 16 disposed on both sides of one reaction rail 22 are described as (columns), but the present invention is not limited to this. For example, single sided (sfng)
In other words, it can also be applied to a linear motor device disposed on one side of the reaction rail 22.

〔Effect of the invention〕

As explained above, by providing a cooling mechanism outside the core that constitutes the linear motor device, this invention makes it possible to effectively guide cooling air to the end windings of the coils, thereby reducing heat. While ensuring effective dissipation, lowering the internal heat encountered inside the side cover lowers the operating criteria for insulation and allows the use of less bulky materials. This allows for greater spacing between adjacent coils, thereby increasing cooling of the coils.

Further, in the present invention, preferably, the baffle means is arranged between the side cover and the coil end turn instead of around the end so that air is introduced between the coils. It can promote the conduction of heat from the air to the cooling air.

Airflow between the coils is then facilitated by the insulation mechanism shown in Figure 6, providing compact and effective insulation, maximizing free space between the coils,
Increase airflow through it. Additionally, the side cover assembly can be easily removed for servicing, and multiple fans can be mounted on each side of the motor to provide continued cooling in the event that one fan fails.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a linear motor installed in a vehicle. FIG. 2 is a bottom perspective view with a portion of the primary member of the linear motor shown in FIG. 1 cut away. 3 is a top perspective view of the frame used in the primary member shown in FIG. 2; FIG. FIG. 4 is a perspective view of a part of the frame shown in FIG. 3 with a cover attached thereto. 5 is a side view of the primary member shown in FIG. 2; FIG. 6 is a partially enlarged view of the core shown in the side view of FIG. 5. FIG. FIG. 7 is an enlarged cross-sectional view of the winding shown in FIG. 6. FIG. 8 is a sectional view taken along line 8-8 in FIG. 5. FIG. 9 is a sectional view taken along line 9-9 in FIG. 8. 10 is a plan view of the primary member shown in FIG. 2; FIG. FIG. 11 is a sectional view taken along line 11-11 in FIG. 10. FIG. 12 is a sectional view taken along line 12-12 in FIG. 10. [Explanation of symbols] (16)...Primary menno N of linear motor
- (26)... Core (28)... Winding (30)... Side cover assembly (32)...
・Frame member (72)...Outrigger (80)...Stringer (84)...Support member (96)...Coil (100)...End winding (102)
...Knuckle part (124) ...Lower cover (126) ...Top cover (152) ...Air discharge gap (183) ...Winding cooling fan (1
84) Air intake (194) Air dam (baffle means) (196
), (198) ... Core Cooling Fan Patent Applicant Urban Transport-John Deheropment Cohortation Limited

Claims (26)

[Claims] (1) An elongated core, having a plurality of turns at predetermined intervals along the core, extending in the transverse direction, and having end windings protruding from both ends of the core, and the direction of the windings being reversed. a motor winding including a knuckle portion that is configured to rotate the motor; a pair of side cover assemblies that extend along the sides of the core and surround the end winding; A linear motor device comprising: a plurality of fans that guide the end winding and cool the end winding; (2) Baffle means is disposed between the end winding and the side cover to guide air between adjacent end windings of adjacent turns. linear motor device. (3) The fan guides air from one side to the other side, and the air discharge means is disposed on the other side. linear motor device. (4) The linear motor device according to claim 3, wherein the discharge means is arranged on the opposite side of the fan. (5) The core is located between a pair of frame members, and the side cover assemblies are each supported by outrigger assemblies extending laterally from the frame members. The linear motor device according to item 3. (6) The linear motor device according to claim 5, wherein the fan is supported by an outrigger assembly. (7) The side cover assembly comprises an upper cover and a lower cover, each cover having one end terminating adjacent the core and an opposite end supported by the outrigger assembly. 7. The linear motor device according to claim 6, characterized in that: (8) The linear motor device according to claim 7, wherein the fan is installed on the upper cover. (9) The linear motor device according to claim 8, wherein the discharge gap that allows air to be discharged from the side cover is provided in the lower cover. (10) The linear motor device according to claim 9, wherein the discharge gap is on the opposite side of the fan. (11) A patent characterized in that the outrigger assembly is fixed at both ends to the frame member and a stringer extending generally parallel to the frame member at a predetermined distance. Claim 1
The linear motor device according to item 0. (12) The linear motor device according to claim 11, wherein a baffle means is mounted inside the lower cover, and the baffle means extends generally parallel to the frame member. (13) a stringer is connected to the frame member by a cross beam, a support member extending parallel to the frame member between the beams, and the end winding of the turn connects to the support member midway through its ends; 12. The linear motor device according to claim 11, wherein the linear motor device is connected. (14) The linear motor device according to claim 2, wherein an additional fan is arranged adjacent to the core to guide air across the core. (15) The core is supported between a pair of frame members,
15. Linear motor arrangement according to claim 14, characterized in that an additional fan is arranged between the frame members. (16) A frame having a pair of parallel frame members spaced apart, a core disposed and supported between the frame members, a plurality of turns held by the core and spaced apart at predetermined intervals along the core; , a pair of parallel portions extending in the transverse direction, each of the turns being supported by the core, and interconnected by an end winding projecting beyond the core toward both ends; a motor winding having a knuckle portion that serves as an end winding; a pair of side cover assemblies that extend along the sides of the core and cover the end winding; a core cooling means that is disposed between frame members and that takes heat from the core; A cooling device comprising a winding cooling means disposed on the outside of a frame member and on either side of the frame member to take heat from the end winding. (17) The linear motor device according to claim 16, wherein the winding cooling means includes one fan and guides air inside each of the side cover assemblies. (18) Each side cover assembly has an air intake and an air outlet in opposing positions, and the fan causes air from the intake to flow through the end winding to the outlet. Claim 1:
The linear motor device according to item 7. (19) The linear motor device according to claim 18, wherein a baffle means is disposed inside each side cover assembly, and the baffle means guides air through an end winding. . (20) The linear motor device according to claim 18, wherein the plurality of fans are arranged at each end of the core. (21) The fan is installed in the upper cover of the side cover, the outlet is installed in the lower cover of the side cover, and the outrigger assembly is installed in the frame member and connects the upper cover and the lower cover on the outside of the end winding. 21. The linear motor device according to claim 20, wherein the linear motor device is characterized in that the two are interconnected. (22) an elongated core member with a plurality of transverse slots in its lower portion; a pair of spaced apart parallel sections respectively received in the slots and interconnected by end windings extending transversely at opposite ends of the core; a motor winding having a plurality of turns, each having a plurality of turns; a side cover surrounding at least a portion of the end winding at each end of the core; A single-sided linear motor device, characterized in that it consists of a cooling device that takes (23) The single-size cooling device according to claim 22, wherein the cooling device includes a plurality of fans disposed on each side cover, and each fan introduces air into the side cover. Dead linear motor device. (24) The side covers each consist of an upper part and a lower part,
24. The single-sided linear motor device according to claim 23, wherein a fan is disposed in the upper part. (25) The single-sided linear motor device according to claim 24, wherein the plurality of gaps are provided in the lower side cover to promote air discharge. (26) A single according to claim 25, characterized in that baffle means are arranged in the lower part, so that air is introduced between adjacent turns of the winding during passage from the fan into the gap. Sided linear motor device.