JPH0613372U - Mounting structure for rotary rectifier of brushless AC generator - Google Patents

Abstract

(57) [Summary] [Purpose] The centrifugal force generated by the rotation of the generator is connected to multiple terminals inside the exciting rotor of the rotary rectifier that uses a diode built into the exciting rotor of the brushless AC generator. If the terminal is supported by the coil bobbin of the wire wound type resistor via the stud type support and the strap type support, the coil bobbin made of synthetic resin could be damaged. It is intended to provide a structure. A ring-shaped terminal support (10, 16) having protrusions arranged equidistant from each of a plurality of terminals (2) without using the coil bobbin (6a) as a supporting member.
19 and the like are provided to support the terminals of the rotary rectifier.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention generally relates to a rotary electric machine, and more particularly to a mounting structure of a rotary rectifier built in an exciting rotor of a brushless AC generator.

[0002]

[Prior art]

 FIG. 6 is a half-body sectional side view in the vicinity of an excitation rotor of a conventional brushless AC generator, a perspective view thereof is shown in FIG. 7, and further FIG. 8 is an exploded perspective view of parts thereof. In this type of brushless AC generator, a support plate 1a is inserted into the open end of one (right side in the figure) of a hollow cylindrical core / coil assembly 1b to form the bottom of the excitation rotor 1. A plurality of (three in the figure) rotary rectifiers, for example, diodes 2 are housed in the space defined by the side wall of the hollow cylindrical core / coil assembly 1b and the bottom. In this type of brushless AC generator, the terminal of the rotary rectifier 2 built in the excitation rotor 1 is subjected to centrifugal force and is bent or deformed, so it is necessary to fix the terminal. The coil bobbin of the wire-wound resistor mounted on the tip of the shaft was used as a support and fixed.

Each of the rotary rectifiers 2 has a shaft portion 2a penetrating through a mounting hole 1e (FIG. 8) formed in the support plate 1a at one end portion 2a (right side in the figure) of the screw shaft. In the figure, the tip portion 2a protruding outward to the right is fastened to the support plate 1a with the nut 3, and the terminal 2b at the other end housed in the excitation rotor 1 is attached to the tip. The hole 2c is inserted so as to match the hole 4a opened near one end of the strap type support 4, and is tightened with a set screw 4b and a nut 4c penetrating the mounting hole 2c and the hole 4a. -The other end of the stud 4 is connected to the stud type support 5, and the threaded portion 5a (see FIGS. 6 and 8) at the tip of the stud type support 5 is a wire wound resistor 6 used as a support. Is attached to the coil bobbin 6a by screwing. The core / coil assembly 1b has a core 1c formed by lamination so that a plurality of protrusions (not shown) for winding a coil are arranged at equal intervals on the outer periphery of the core / coil assembly 1b. It consists of a wound coil 1d.

[0004]

[Problems to be solved by the device]

 The rotary rectifier 2 rotates integrally with the rotary shaft 7, but in the above-mentioned conventional supporting method, the terminal 2b of the rotary rectifier 2 and the strap type support 4 are radially outside the rotary shaft 7 due to the centrifugal force generated by the rotation. There is a risk that the coil bobbin 6a made of resin will be broken by being pulled toward the end and bending moment will be applied to the threaded portion 5a of the stud type support 5.

[0005]

[Means for Solving the Problems]

 In the present invention, instead of using the strap type support and the stud type support, a ring-shaped terminal support surrounding the rotary shaft 7 is provided at a position corresponding to the terminal of the rotary rectifier before the coil bobbin in the axial direction. The terminal support of the rotary rectifier is connected to and supported by this terminal support, and the problem is solved by releasing the coil bobbin from the supporting function. The ring-shaped terminal support divides each of the three circular arc parts that make up the circular ring and the respective circular arc parts, and protrudes outward or inward in the radial direction, and the terminal support is connected to the terminals of the three rotary rectifiers. And connecting projections. In order to manufacture this terminal support, 1) prepare a support material by molding a conductive material into three support single bodies that are formed at equal angular intervals in the circumferential direction, and arrange them in the circumferential direction. To form a ring, or 2) cast a conductive material or bend a wire or rod of a conductive material to form three arcs and protrusions into a continuous, integrated ring. Or either.

[0006]

[Action]

 By using a ring-shaped terminal support having three protrusions arranged at equal angles in the circumferential direction, the centrifugal force generated by the rotation of the terminal 2b of the rotary rectifier 2 is reduced to the ring-shaped terminal support. The coil bobbin has a structure in which the centrifugal force applied to the terminal is not applied to the coil bobbin so that the coil bobbin can be completely destroyed. .

[0007]

【Example】

 FIG. 1 is a sectional view of a half body as a first embodiment of a rotary rectifier mounting structure according to the present invention. FIG. 2 is an exploded view of the parts of FIG. 1 and the conventional art shown in FIGS. The same parts are designated by the same reference numerals, duplicate description will be omitted, and only different points will be described. The terminal 2b inside the core / coil assembly 1b of the rotary rectifier 2 is a ring-shaped terminal support without using the strap type support 4 and the stud type support 5 as in the prior art. It is attached to 10 by screws 11 and nuts 12. As shown in FIGS. 2 and 3 (A), the terminal support 10 is formed by combining three support units 10a, which are formed by molding a rectangular copper wire into three pieces in the circumferential direction, in the circumferential direction. , A circular ring-shaped terminal support 10. The support unit 10a is a straight line that forms a circular arc portion 10b having a central angle of less than 120 degrees and a radial projection 13 that protrudes from both ends in the radial direction and serves as a connecting portion with another adjacent support unit 10a. As shown in FIG. 2, a hole 14 for inserting the screw 11 is provided near the tip of the linear protrusion 13a, and two adjacent protrusions 13a, 13a are provided between the terminals 2 as shown in FIG. The tip end 2b of the is clamped, the screw 11 is passed through, and the nut 12 is tightened. The support unit 10a is covered with a flexible insulating sleeve 15 except for the vicinity of the terminal 10a, which is in contact with the terminal tip 2b, and is wound on the insulating string 15a.

As shown in FIG. 3 (A), instead of combining the three support units 10a, it is integrally molded as a casting such as the aluminum alloy shown in FIG. 3 (B), and the protrusion 13b is formed. The terminal support 16 composed of the circular arc portion 16 and the circular arc portion 16 and the single rectangular copper wire shown in FIG. 3 (C) are bent and the circular arc portion 17b and the radial portion are formed in the same manner as in FIG. 3 (A). It is also possible to use the terminal support 17 in which the protrusions 13c are continuously and integrally formed. These terminal supports 10, 16 and 17 are called an inner ring holding type. On the other hand, a circular ring-shaped terminal support with radial projections protruding inward is called an outer ring holding type, and this type is the terminal support 18 shown in FIG. 3 (D). Is made of an aluminum alloy casting and has a projection 13d and an arc portion 18b and corresponds to FIG. 3B described above. The terminal support 19 shown in FIG. 3E is a rectangular copper wire made of a projection 13e. And 3 support bodies 19a having an arc portion 19b, corresponding to (A) of FIG.

Next, the operation of the rotary rectifier adopting the above-mentioned mounting structure will be described. The terminal 2b at the inner end of the screw shaft of the rotary rectifier 2 arranged at three equiangular positions is , The ring-shaped terminal support 10, 16 to 18 or 19 is applied, and the centrifugal force applied to the terminal 2b is offset and balanced by the terminal support and does not depend on the coil bobbin 6a at all. There is no destruction. Further, as is apparent from FIGS. 2 and 4, an imaginary line is shown at an intermediate position between the rotary rectifiers (diodes) 2 arranged at equal angular intervals in the excitation rotor 1 and adjacent in the circumferential direction. The rotary rectifier 2 ′ having the opposite rectification direction is arranged to connect the outer ring holding type terminal support 18 [FIG. 3 (D)] or 19 [FIG. 3 (E)] to the inner ring holding type shown in FIG. 3B. When used together with the terminal support 16 of No. 1 and the tips 2b of the respective terminals are located on the same circumference as shown in FIG. 4, the terminal support 16 of the inner ring holding type is connected. Between the rectified wave 20 by one rectifier 2 (see FIG. 5 (B)), the rectified wave 21 by one rectifier 2'connected to the outer ring holding type terminal support 18 enters and the three-phase full-wave rectification is performed. It is possible.

[0010]

[Effect of device]

 The terminals of the rotary rectifier built into the excitation rotor are held only in the terminal support as is clear from FIGS. 1 and 2, and the coil bobbin is released from the role of holding the terminals and becomes irrelevant. The centrifugal force applied to the three terminals due to the rotation is canceled by the terminal supports arranged at equal angles in the circumferential direction and balanced, and there is no concern that the coil bobbin will be destroyed as in the conventional case. -Since the two parts of the support and the strap type support are omitted, the structure is simplified, the assembly workability is improved, and the manufacturing cost is reduced. Further, the terminal support can balance the centrifugal force and maintain the mechanical strength, and at the same time, can be used as a part of the electric circuit.

[Brief description of drawings]

1 is a half sectional view of an embodiment of a rotary rectifier mounting structure according to the present invention.

2 is an exploded perspective view of the parts of FIG. 1. FIG.

3 (A) to 3 (E) are schematic plan views showing various configurations of an outer ring holding type and an inner ring holding type terminal support according to the present invention.

FIG. 4 is a schematic plan view showing a positional relationship when the outer ring holding type and the inner ring holding type terminal support according to the present invention are arranged together.

5 (A) is an electric circuit diagram when the outer ring holding type and the inner ring holding type terminal support are arranged together in FIG. 4, and FIG. 5 (B) is FIG. It is explanatory drawing which shows the three-phase full-wave rectification in A).

FIG. 6 is a half-body sectional view showing a conventional rotary rectifier mounting structure.

FIG. 7 is a perspective view of FIG.

FIG. 8 is an exploded perspective view of the parts of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Excitation rotor 1a Support plate 1b Core-coil assembly 2, 2'Rotary rectifier 2a One end of a screw shaft 2b Terminal 6 Winding resistor 6a Coil bobbin 7 Rotation shaft 10, 16, 17, 18 , 19-terminal support 10a Support single unit 10b, 16b, 17b, 18b, 19b Terminal support
Arc part 13a to 13e of protrusion 15 protrusion 15 insulating sleeve 15a insulating string 20, 21 rectified wave

Claims (6)

[Scope of utility model registration request] 1. A support plate serving as a bottom portion for supporting a rotating shaft at one open end of a hollow cylindrical core / coil assembly.
A plurality of rotary rectifiers housed in the internal space of the core / coil assembly, wherein one end of each screw shaft of the rotary rectifier is A plurality of rotary rectifiers which are fixed to project outward through the support plate and have terminals at the other end in the exciting rotor; and the exciting rotor on the rotating shaft. -In a rotary rectifier mounting structure of a brushless alternator having a wound-type resistor mounted on the coil bobbin and having a coil wound around the coil bobbin: A projection protruding radially outward or inward in the radial direction at a position corresponding to each terminal of the plurality of terminals and connected to each of the plurality of terminals of the rotary rectifier, and a connection between each adjacent projections. And the rotation axis is coaxial with the rotation axis A terminal support including a terminal support body made of a conductive material having a surrounding arc portion and a covering portion made of an insulating material for covering a portion of the terminal support body other than a contact portion with the terminal is arranged. A rotary rectifier for a brushless alternator, characterized in that all of the centrifugal force applied to each of the terminals by the rotation of the brushless generator is offset and absorbed by the terminal support instead of the coil bobbin. Mounting structure. 2. The terminal support body is formed by circumferentially connecting a plurality of support bodies that are equally divided in the circumferential direction. 1. A structure for mounting a rotary rectifier of the brushless AC generator according to 1. 3. The terminal support body is integrally formed by casting or bending a conductive material and having a plurality of arcuate portions and projections that are equally divided in the circumferential direction. The mounting structure for a rotary rectifier of a brushless alternator according to claim 1, wherein 4. The rotation of a brushless alternator according to claim 1, wherein the terminal support body is formed as an inner ring holding type in which a plurality of protrusions protrude outward in the radial direction. Rectifier mounting structure. 5. The rotation of the brushless alternator according to claim 1, wherein the terminal support body is formed as an outer ring holding type in which a plurality of protrusions protrude inward in the radial direction. Rectifier mounting structure. 6. The terminal support is prepared in two types, an inner ring holding type and an outer ring holding type, and the inner ring holding type terminal support has an arc portion of a projection of the outer ring holding type terminal support. Three-phase full-wave rectification is provided in which the protrusions that are arranged inwardly and that protrude outward in the radial direction are arranged alternately on the same circumference as the protrusions of the outer ring holding type terminal support at equal angles. The structure for mounting a rotary rectifier of a brushless alternator according to claim 1, wherein a bridge is formed.