JPH0116379Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotary rectifier used in a brushless alternator, etc., and is particularly intended to improve the strength of the capacitor mounting portion.

This type of conventional rotary rectifier rectifies the AC output of the exciter armature while rotating together with the rotor of the exciter and main generator, and supplies it to the main generator field as DC excitation current. It has a structure in which a diode rectifier and a bus bar for connecting it in the form of a bridge are attached via an insulator to the end face of a support that is fitted and fixed to the rotating shaft.

Usually, in this type of rotary rectifier, a capacitor is placed in parallel with the DC output in order to suppress the spike voltage generated inside the rectifier.

In this case, since the rotating rectifier is subjected to centrifugal force due to high-speed rotation, sufficient consideration must be given to its strength. The diode flow regulator has a structure that can be firmly tightened with a nut, so there is no problem, but careful consideration must be given to the mounting means, especially how to support the centrifugal force applied to the capacitor with the support.

This idea was made with attention to the above points, and by fixing the capacitor with resin etc. in a sleeve attached to the support in the axial direction, the capacitor has a strong structure against centrifugal force. The purpose is to provide a rotary rectifying device that can.

Hereinafter, embodiments of the rotary rectifying device of this invention will be described based on the drawings. FIG. 1 is a front view showing the configuration of one embodiment, and FIG. 2 is a side sectional view of FIG. 1. Moreover, FIG. 3 is a wiring diagram.

In Figures 1 to 3, reference numeral 1 indicates a rotating shaft of the rotary rectifier, and a cylindrical support 2 having a diameter sufficiently larger than that of the rotating shaft 1 is fixed concentrically to the outer peripheral surface of the rotating shaft 1. There is. The support 2 forms the main body of the rotary rectifier, and on the end face of the support 2, six diode rectifiers 3 constituting a three-phase bridge are arranged in the circumferential direction and are attached in plane symmetry with the bus bar 4. .

As shown in FIG. 3, this diode rectifier 3 is bridge-connected between busbars 4, and its input end (end opposite to the busbar) is connected to the exciter armature winding wire 6a via the exciter armature winding lead wire 6a. connected to child 6. The busbar terminal 4a is connected to a main generator field winding (not shown). A capacitor 8 is connected between the bus bar terminals 4a.

Here, the explanation returns to FIGS. 1 and 2. The diode rectifier 3 and bus bar 4 are insulated from the support 2 by an insulator 5. An exciter armature 6 is fixed to the outer periphery of the support 2 in order to reduce the size.

Further, on the end face of the support 2, a cylindrical sleeve 7 for mounting a capacitor is located in the middle of the empty area provided between one end of the left and right bus bars 4 in the circumferential direction, and is located at approximately the same pitch as the diode rectifier 3. is penetrated in a direction parallel to the axis of the rotating shaft and is integrally attached to the support 2 by means such as welding, and a capacitor 8 is housed within this sleeve 7.
The capacitor 8 is for suppressing the spike voltage generated inside the rectifier, and the capacitor 8 is fixed by filling the sleeve 7 with a resin material or the like.

By doing this, the relatively simple structure can sufficiently withstand centrifugal force due to high-speed rotation. Furthermore, as shown in FIG. 1, by arranging the diode rectifier 3 and the capacitor 8 including the sleeve 7 at appropriate positions on the same circumference, a small and lightweight rotary rectifier with well-balanced rotation can be obtained. I can do it.

As described above, according to the rotary rectifier of this invention, the sleeve is located on the same circumference as the array of diode rectifiers on the end face of the support and is attached to the sleeve extending parallel to the axis of the rotating shaft. Since the capacitor is inserted, it is possible to improve the strength of the capacitor and its mounting part against centrifugal force with a simple structure, and even if the capacitor becomes large, it only needs to be mounted in one place, which simplifies the mounting structure. In addition, it is possible to obtain a rotary rectifying device that has good rotational balance and can be downsized.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the configuration of an embodiment of the rotary rectifier of this invention, Fig. 2 is a side sectional view of Fig. 1,
FIG. 3 is a connection diagram of a diode rectifier in the rotary rectifier as above. 1...Rotating shaft, 2...Support, 3...Diode rectifier, 4...Busbar, 4a...Busbar terminal, 5...Insulator, 6...Exciter armature, 6a
...Exciter armature winding lead wire, 7...Sleeve,
8... Capacity. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A support fixed concentrically to the rotating shaft, a diode rectifier integrally attached to the end face of the support and connected to the bus bar, and a diode rectifier located on the same circumference as the arrangement of the diode rectifiers on the end face of the support. a cylindrical sleeve fixed through the shaft in parallel with the axis of the rotating shaft; an insulator for insulating the diode flow regulator and bus bar from the support; and a side opposite the bus bar of the diode flow regulator fitted and fixed to the outer peripheral surface of the support. A rotary rectifier comprising an exciter armature connected to the sleeve, and a capacitor for suppressing spike voltage embedded and fixed in the sleeve.