JP3306744B2 - Balance adjustment mechanism for rotor of 4-pole salient-pole brushless AC generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balance adjusting mechanism for a 4-pole salient pole type field rotor which is a rotor of a brushless AC generator.

[0002]

2. Description of the Related Art In a 4-pole salient pole type field rotor, FIG.
As shown in (1), the balance adjustment of the conventional field rotor R is performed by arranging a balance plate B on four magnetic pole heads H of a field iron core and attaching a balance weight to the balance plate B. It has been usual to adjust both the balance of R and the balance of the armature rotor for excitation to adjust the balance of the whole 4-pole salient pole type field rotor. In the case of the multi-pole type, the disk is fixed to the rotating shaft, and the peripheral portion of the disk is cut off to adjust the overall balance.

[0003]

However, the magnetic pole head H
When mounting the balance plate B, a small bra
Salient poles of 4-pole salient pole type field rotor in silec alternator
Since the distance A between the magnetic pole heads H of the portion is short, it is almost circular.
Well, balance plate B for each magnetic pole head H₁, B _TwoTo ba
The lance weight can be directly attached to the required location,
Easy balance adjustment, but large brushless AC power generation
Machine, the diameter of the 4-pole salient pole type field rotor increases (see
4 (dotted line at the magnetic pole head), the space where the field winding is not wound
Portion, that is, the distance A 'between the magnetic pole heads H of the salient poles is long.
Because this space is wide, it is almost circular and far from
If a balance weight is required between the pole heads,
The balance weight is fixed to the balance plate of the head H
Even so, it was difficult to adjust the overall balance.
Moreover, in large brushless alternators, the space is
Not only increase, but also stack size of magnetic pole core
When the field winding is automatically wound,
Disturbance in the winding state makes it easy to get out of balance,
When performing varnish coating in the final process,
Resonance of the lance is also large, and the balance adjustment is more
It was necessary and the adjustment was difficult.

An object of the present invention is to provide a four-pole salient-pole type brushless AC generator in which a balance weight is set between the magnetic pole heads.
If necessary, the balance weights (bolts, etc.) must be distributed and attached to both the balance plates B ₁ and B ₂ . In order to determine the dispersion ratio, many people rely on the intuition and experience of the skilled person, and it is necessary to attach a large number of balance weights, and the installation work time is wasted. Accordingly, an object of the present invention is to provide a balance adjustment mechanism that enables anybody to perform a reliable balance adjustment by a simple method. Another object is to provide a balance adjustment mechanism with good cooling efficiency.

[0005]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rotor for a four-pole salient-pole type brushless AC generator, which is formed in a four-pole salient pole shape in which salient poles are arranged in a cross shape. the magnetic field rotor are wound the magnetic coil secured to the shaft rod, securing the cooling fan in the same axis a certain distance to one side of the field rotor provided with the exciter armature, the other side A rectifier mounting disk is arranged near one or both sides of the exciter armature, and a disk is arranged near the outside of the cooling fan.
The provided a plurality of through holes that generates wind is formed in the rectifier mounting disc, attachable to the balance weight is curved outer peripheral edge of the disc provided in proximity to the outer side of the rectifier mounting disc and the cooling fan These disks can be achieved by a structure in which the disks are screwed and attached to the exciter armature and the cooling fan.

Further, the balance adjusting mechanism of the present invention is configured such that the balance weight is fixed to the outer peripheral edge of the rectifier mounting disk on one or both sides of the exciter armature or the disk mounted on the cooling fan, so that the mounting is simple. In addition, since the shape is substantially circular, the balance can be reliably adjusted at any position. Further, a flow of air is generated by the through holes formed in the disk, so that the cooling effect of the rotor of the large machine can be sufficiently achieved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The balance adjusting mechanism for a four-pole salient-pole type brushless AC generator according to the present invention is based on the fact that the field rotor of a large brushless AC generator has a larger diameter, and the distance between the magnetic pole heads increases in proportion thereto. A '(FIG. 4) is formed large, but is fixed to one or both sides of the exciter armature arranged on one of the field rotors without attaching a balance weight to the balance plate B' of the pole head H. The balance can be easily adjusted because balance weights can be attached to all positions on the entire circumference of the rectifier mounting disk and the disk screwed to the other cooling fan. As for the cooling, the air flows through the through-holes of the rectifier mounting disk, so that not only the exciter armature but also the rectifier mounted on the disk has a cooling effect.

Since the member for mounting the balance weight of the present invention forms a disk and the unbalance correction portion is circular, the balance weight can be easily obtained from the unbalance correction angle and the correction amount obtained by inputting the radius of the correction surface to the balancing machine. Since it can be mounted, it does not require the skill of an operator.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a four-pole salient-pole type brushless AC generator according to an embodiment of the present invention. FIG. 2 is a side view of an embodiment of a balance mounting disk used in the present invention. FIG. 3 is a schematic side view of another embodiment of the present invention. FIG. 4 is a schematic side view of a field rotor of a conventional four-pole salient-pole type brushless AC generator. FIG. 5 is a view as seen from the arrow S in FIG.

As shown in FIG. 1, reference numeral 1 denotes a 4-pole salient pole type field rotator in which salient poles are arranged in a cross shape, and a plurality of field iron plates are laminated and a field winding is wound. . The rotating shaft 2 is inserted into the center of the laminated field core. An exciter armature 3 is fixed to the rotation shaft 2 outside the field rotor 1. A disk 5 on which a rectifier 4 is mounted in close proximity to the exciter armature 3 is fitted on the rotating shaft 2 and fixed to the exciter armature 3 with bolts 6. The outer peripheral edge of the disk 5 is curved, and a balance weight 7 is attached to the curved portion. Further, as shown in FIG. 2, the disk 5 is provided with a plurality of through holes 5a. On the other hand, as shown in FIGS. 1 and 3, a disk 9 is fixed to the outer surface of a cooling fan 8 fixed to the outside of the rotating shaft 2 of the field rotor 1 by screws 10. The outer periphery of the disk 9 is curved so that the balance weight 7 can be attached.

The brushless AC generator of the four-pole salient pole type according to the present invention has a disk 5 fixed to the armature 3 of the exciter and a disk 9 fixed to the cooling fan 8 without attaching a balance weight to the magnetic pole head H. The balance weight 7 is attached to the periphery. These disks 5 have through holes 5a, 5a
Since a plurality of through holes are provided, cooling air is generated by the plurality of through-holes 5a with the high-speed rotation of the rotating shaft 2 to exert an excellent effect of cooling the field rotor 1 and the rectifier 4. .

Also, since the balance weight is attached to the curved portion of the outer peripheral edge of the disk 5, the balance adjustment operation can be easily performed by the balancing machine based on the calculation of the overall imbalance.

In the case of the other embodiment shown in FIG. 3, disks 4 and 5 having rectifiers 4 mounted on both sides of an exciter armature 3 of a 4-pole salient pole type field rotor 1 are provided. A balance weight is attached to a curved portion of the outer peripheral edge of the disk.

[0014]

The rotor balance adjusting mechanism of the four-pole salient pole type brushless AC generator according to the present invention has a rectifier without attaching a balance weight to the salient pole head of the four-pole salient pole type field rotor. The balance can be easily and reliably adjusted because the outer peripheral edge of the mounting disk or the outer peripheral edge of the disk screwed to the cooling fan is mounted. Also, the rectifier mounted on the disk can serve as a cooling fan.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a four-pole salient-pole type brushless AC generator according to an embodiment of the present invention.

FIG. 2 is a side view of an embodiment of a balance mounting disk used in the present invention.

FIG. 3 is a schematic side view of another embodiment of the present invention.

FIG. 4 is a side view showing a magnetic pole head of a field winding of a conventional 4-pole salient-pole type brushless AC generator.

FIG. 5 is a view as seen in the direction of the arrow S in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 4 pole salient pole type field rotor 2 ... Rotating shaft 3 ... Exciter armature 4 ... Rectifier 5 ... Disk 6 ... Bolt 7 ... Balance weight 8 ... Cooling fan 9 ... Disk 10 ... Screw

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H02K 15/16 H02K 19/26

Claims (1)

(57) [Claims] In rotor 1. A 4-pole salient brushless alternators, formed in four-pole salient placing the salient poles cross, there by winding a field winding of these poles fixing a field rotor in an axial rod fixed this field rotor exciter armature is provided a predetermined distance on one side of the cooling fan on the other side on the same shaft, one side of the exciter armature Or, place the rectifier mounting disk close to both sides, and on the outside of the cooling fan
Closely by providing a disc, a plurality of through holes that generates wind is formed in the rectifier mounting disk, curved outer peripheral edge of the disk which is provided in proximity to the outer side of the rectifier mounting disc and the cooling fan balance A balance adjustment mechanism for a rotor of a four-pole salient pole type brushless AC generator, wherein weights can be attached, and these disks are attached to the exciter armature and the cooling fan by screws.