JPS5895952A - Salient-pole type rotary electric machine - Google Patents

Abstract

PURPOSE:To raise the cooling effect of a rotary electric machine by providing a ventilating duct passing axially between the base ends of the poles of a salient- pole type rotor core and radially providing a ventilating duct communicating with the duct in a rotor core, thereby increasing the heat sink area. CONSTITUTION:Core members 3a-3c having, for example, 4-salient pole type poles 2 are arranged axially at an equal interval around a rotational shaft 1, opposing faces of the adjacent poles 2 axially at the members 3a-3c are coupled via planar spacers 4, and the second ventilating duct 8 which extends in a direction perpendicular to the shaft 1 is formed at each gap among the members 3a-3c. The first ventilating duct 5 faced via insulators 6 with the end faces of field coils 7 wound on the poles 2 at both sides in parallel with the shaft 1 is provided between the base ends of each pole 2 of the members 3a-3c.

Description

[Detailed description of the invention] The present invention relates to a salient pole type one-transfer rock.

Conventionally, - Synchronous power generation of cedar! ! l! In such single-turn electric machines, a cedar rotor as shown in FIG. 5 is used as the first-turn field. In other words, I miss Figure 5,
31 with a field core, and a salient pole-shaped magnetic pole wing with a Fi411 configuration is formed on its chest circumference G n s These 4!
Field coils are respectively wound around one src of the RA poles 32 via insulating material wings.

In the case of the first trochanter with a barrel structure, when the generator is operating, the coils generate a considerable amount of heat due to copper loss, ie Joule heat, so normally a cooling fan ( (not shown) A field coil of 34 tl is connected to the shaft of the rotating shaft, and external air for cooling is circulated for 1 m yen of power generation.
- A method is adopted to cool the rotor, stator, etc., including the field coil. Even if the desired cooling effect can be obtained because the circumferential speed is relatively high near the tip, some field coil wires near the proximal end of 1l141 and 32 have slow circumferential speeds, so the cooling effect yI! In addition, as shown by a in Figure 5, the beginning of winding 0 of the field coil is located at the farthest position from the outer circumference, as shown by a in Figure 5. The problem was that heat was trapped in the area, resulting in insufficient cooling of this area.

In addition, between the base ends of adjacent m wings, m5 kousin, b
The part of the magnetic flux outside the main magnetic path is kDI4.
There are parts that are likely to leak and reduce the effective magnetic flux, leading to a decrease in magnetic efficiency.

Historically, in order to improve the cooling effect, methods such as (b) increasing the diameter of the rotor to increase the heat dissipation area of the entire rotor and increasing the speed of the field coil were adopted. However, according to this, the rotor becomes larger, which inevitably leads to an increase in the size and weight of the entire rotating electric machine such as YIk, which leads to higher costs.

The present invention was devised in consideration of the above points, and the main purpose of the present invention is to improve the cooling efficiency by promoting cooling of the particularly high-temperature parts of the rotor coil and the beginning part of the winding, and to improve the cooling efficiency while rotating the rotor coil. The magnetic flux flow between the a-poles of the rotor allows efficient excitation without any interference, and the heat dissipation area is increased without resorting to measures such as making the rotor larger, improving cooling performance. Another object of the present invention is to provide a salient pole type sieving electric shear which enables a rotating electrical machine to be made smaller, have an increased shaft load, and reduce costs.

Another object of the present invention is to provide a salient pole type rotor which can obtain an even greater cooling effect by providing ventilation ducts in the narrow stator according to necessity.

That is, the misfires 8A were provided in a radially protruding manner constituting the rotor core. A first through duct parallel to the (b) rolling axis is installed between the base ends of the a number of magnetic poles, and a first through duct parallel to the (b) rolling axis is installed inside the (b) trochanter core. The above object is achieved by providing a first trochanter which is directly connected to the first trochanter and is provided with a second ventilation duct that communicates with the first ventilation duct.

The present invention will be explained below with reference to FIG.

1 to 3 show one embodiment of the present invention, and FIGS. 1 and 2 show the structure of a salient pole type rotor. For example, core members 3a, 3b, 3c having salient magnetic poles 2t having a laminated structure having a four-pole structure are arranged at equal intervals along the rotational axis IVc. Each of these core members 3a, 3
b, Field core 3 as a trochanter core in the entire 3ctl (b)
Approximately the same direction of the magnetic poles 2 adjacent to the (b) rotation axis of each core member 3a, 3b, 3c are linked by a plate-shaped spacer 4, and the @ hook of the valley magnetic pole 2 A field coil 7 as a rotor coil is wound around each of the rotor coils with an insulating material 6 interposed therebetween.

Therefore, in the valley core members 3a, 3b, and 3c.

The proximal ends of the radially protruding 9-magnetic 2 pieces...UC
As shown in FIG.
Parallel to rotation axis 1 w! A ventilation duct 5 of Il extends through the core members 3a, 3b, 3c, and communicates with each other along the rotation axis l, as shown in FIG. There is. Furthermore, these ventilation ducts 5
If it is the older brother from the cross section of the - trochanter, cut out the i end of magnetic pole 2,
Since this also narrows the path of the magnetic flux, it is desirable that the shape of the VlT surface and the shape of the IyI surface do not affect the magnetic path as much as possible.
IT surface white quarter circle or insulation material 6
It is preferable to form the cross section into a substantially isosceles triangle with the two sides of [ being equal sides.

In addition, core members 3a and 3b around the spacer 4
.

A second ventilation duct 8 extending in a direction opposite to the rotation 1111 is formed by the mutual gap between the two parts 3c. Such second
The number of ventilation ducts 8 and the number of divided core members are not limited to 4"J in this embodiment, and can be freely increased or decreased depending on the size of the equipment, heat generation, etc. It is possible.

The salient pole type (b) converter according to the present invention is composed of the above-mentioned rotor and an armature component, and is the main power generator of a brushless generator driven by an internal combustion engine, as shown in FIG. This brushless generator is suitable for use as a motor.The general gI of this brushless generator is described along the lines of the third section (C). The drive shaft (not shown) is identified by a bearing 12 on the drive shaft (not shown), and the other end is identified by a bearing 14 on the coushing 13 (2).
It is supported so that it can move freely.

The key electric machine A according to the present invention has an armature 15t as a stator disposed around the salient pole type (b) rotor 10 with an air gap 4 interposed therebetween. is fixed to the casing 13 by bolts fL7 is connected to n by the armature core 16 as a stator core and the armature coil 17.
11 is made ○ Excitation a is used to send excitation current to the field of the main generator A to the generator B, that is, to the field coil 7 in the (b) rotation.
A rotor 18 with a rotating shaft lVc fixed, and a casing 1
3 Consists of vC fixed fixed foot field ff119, u trochanter 18 is Denkishi Tetsu no L? and the armature coil 21.
The fixed field 19 is composed of a field core n and a field coil O.

A block-shaped collar 24 is fixed to one side of the armature core 20 near the main generator A, and a rectifier δ is mounted on a conductive plate on one side of the collar 24 farther from the main generator A, and a rotating rectifier is installed. 26, which rectifies the current generated in the armature coil 21 of the excitation generator B by this (b) commutation and rectification device, and supplies the excitation current to the field coil 7 of the main generator A. It is.

27 in the figure is a vent hole drilled in the bracket 28, a cooling outside air exhaust port formed above the cooling fan 11 at 4 m above the 29μ casing 13, and 30 is a vent hole drilled in the bracket 28 to increase ventilation efficiency. It is a ventilation kite.

Next, the operation of the present invention will be explained with reference to FIG. As shown in Fig. 3, the outside air from the vent n is branched into airflows with narrow ridges, passes through the generator, passes through the ventilation kit (equipment) and the cooling fan 11, and exits from the exhaust port 14. A portion of the adult outside air is exhausted through the first ventilation tap of the rotor 10.
Airflow flows into the duct 5, passes through the ventilation duct 5 of each core member 3a, 3b, and 3c, and heads toward the cooling fan 110,000;
From the ventilation duct 5 of the core members 3a, 3b through the second ventilation duct 8 between each core member 3m, 3b, 3c (
b) Through the air cap between the trochanter 10 and the armature core 16, the airflow is divided into an airflow directed toward the cooling fan 11.

Therefore, -S of the field coil 7 located near the base end of the magnetic pole 2 of each core member 3a, 3b, 3c is suitably cooled by the outside air flowing through the ventilation duct 5.

Beyond magnetic & 2! i! The circumferential speed is high in the vicinity of the 8th section, and in combination with the part where the cooling is accelerated, the field coil 7 is cooled almost uniformly and efficiently as a whole, and the ttlL flow in the second ventilation duct 8 is reduced. The outside air that flows through the core members 3a, 3b, and 3c arranged on the top of this ventilation duct 8/)
To suitably cool each side surface and a part of the circle III 110 of the field coil 7 facing the ventilation mesh 8 through the insulating material 6, that is, the part at the beginning of the winding of the field coil 70, which tends to heat up quickly due to its heat dissipation properties. becomes.

At the same time, each core member 3a, 3b faces the outside air flowing through the first ventilation tact 5.

3c, the first and second ventilation ducts 5 and 8 are connected to the outside air passing through them and the rotating shaft.
The core members 3m, 3b, 3c''j, that is, most of the surface species of the field core 3, are suitably cooled by the outside air flowing through the air cap around the O. The heat dissipation effect is high 19, the heat dissipation effect through the field core 3 of the field coil 7 is also promoted, and (b) a large cooling effect is achieved for the entire trochanter io. Since the outside air that has passed through the ventilation duct 8 is blown directly onto the inner peripheral surface of the armature core 16 via the air cap, the t* element 15111 can be sufficiently cooled.

Next, FIG. 4 shows another embodiment of the present invention, in which the core member 3a, 3b, 3 is divided into four parts.
A flat first ventilation duct 5 with one axis of rotation l for each of c and 3d.
and each core capital 3a, 3b, 3c, 3
d, a second ventilation duct 8 perpendicular to the rotation axis 1
At the same time, a third ventilation duct 8' communicating with the second ventilation duct 8 is bored inside the armature core 16 constituting the armature 15.

According to this example, the outside air that has passed through the second ventilation duct 8 of the rotor 101II flows into the third ventilation duct 8' in the armature core 16 to cool the armature core 16 from inside, and then the A portion of the outside air that flows through the cooling fan 110,000 times between the child core 16 and the casing 13 via m, and also flows through the cap between the field core 3 and the armature core 16 from the direction of the vent n. 8'rc can flow into the ventilation duct 8' in the armature core 16 and contribute to the cooling of the armature core 16. armature core 16
．． As a result, cooling of the fC coil 15 including the ht Isogo coil 17i is promoted, and an excellent cooling effect of the entire one rotation vILts can be obtained.

Please note that the brushless generator shown in Figure 3 is an example of the application of the present invention, and the scope of application of the present invention is 1.
It goes without saying that it is not limited to GJ, etc., but can also be used as a converter such as a different phase generator or a synchronous turtle A machine.

As described above, according to the present invention, between the proximal ends of the plurality of radially protruding a poles constituting the trochanteric core,
(b) A first ventilation duct is installed parallel to the wheel, and a second ventilation duct is provided inside the trochanter core, which is substantially perpendicular to the rotation axis and communicates with the first ventilation duct. Since the rotor is equipped with a ventilation tact, the part of the field coil as the rotor coil located at the magnetic pole base #i, that is, the part where the circumferential speed tends to be relatively slow and the field coil. It is possible to suitably cool the winding start part of the magnetic field, keep the temperature distribution of the entire field field uniform, and perform efficient cooling. By forming the base end portions between the base end portions, it is possible to completely prevent invalid magnetic flux from flowing between the base end portions. , - The magnetic flux directed from the a pole to the other fIi can be passed along the side of the first ventilation duct at the shortest distance, and the effective magnetic flux can be totally increased to improve the magnetic efficiency and excitation efficiency. There are effects that can be achieved.

In addition, by providing the second ventilation tact which is substantially orthogonal to the rotation axis, (b) the substantial surface area of the trochanter core that is exposed to the outside air, that is, the heat dissipation surface 5tt, can be increased in terms of air flow, and the rotation This has the advantage that the child core can be effectively cooled from the inside and outside, and the temperature rise of the rotor can always be maintained at a constant level.

Furthermore, as in the past, there is one trochanter for cooling, and a rotary basket 11 for power generation! Since there is no need to increase the size of the rotating electrical machine, it is possible to make the rotating electric machine smaller and lighter.

It has the advantage of contributing to the reduction of manufacturing losses, and also has the ease of construction in that the present invention can be constructed by adding a small amount of processing to the conventional center-to-other type (2) trochanter. 8. Third ventilation duct in stator core according to
By doing so, the cooling effect of the stator thin parts can be completely ensured, and an even more remarkable cooling effect can be obtained.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention. Figure 1 is (B) an explanatory diagram of the trochanter, Figure 2 is a view in the X-Xa direction in Figure 1, and Figure 3 is an explanatory diagram of the trochanter. Figure 4 is a vertical cross-sectional view of the brushless WL rock, Figure 4 is a half-longitudinal cross-sectional view showing B5 of another embodiment of the present invention, and Figure 5 is a semi-longitudinal view showing the conventional (b) trochanter. ...Rotor, 2...Magnetic pole, 3...
... Field core, 3a, 3b, 3c, 3d
... Core member, 4 ... Spacer, 5.
...%L ventilation duct% 6...Insulating material, 7...Field coil, 8...Second ventilation tact% 8'... ...Third ventilation tact, 10
...Rotor, 15...Armature, 16.
...Denki Nakoa, 17...Electronic coil Figure 1 Figure 2 Figure 3 T4 Figure 15 Figure D a j': J D

Claims (1)

[Scope of Claims] (lJ'll?j) Between the proximal ends of the radially protruding ridges constituting the trochanter core, (b) the 10th ridge parallel to the axis of rotation; The first trochanter tube is provided with a second ventilation duct i installed in the rotor core and substantially perpendicular to the front &: first rotation axis and communicating with the first S-way tact. (2) A third ventilation duct tr is connected to the circular part of the stator core through an air gap to the second wind tact.
& Become? 8JWIf the salient pole type one-transfer rock according to claim 1.