DD284307A5 - ROTATING RECTIFIER ASSEMBLY FOR THREE-PHASE SYNCHRONOUS GENERATORS - Google Patents

Abstract

The invention relates to a rotating rectifier arrangement for three-phase synchronous generators, with which the alternating current generated in the armature of a Wechselstromerregermaschine rectified the field winding of an electrical machine is fed. It is known to arrange rectifier diodes on scheibenfoermigen carrier bodies radially and assemble them into different circuits. For this purpose, a number of switching connections is required, which are exposed to the rotation-induced vibrations. Special precautions for protection against shrinkage are therefore unavoidable. This fact is borne in mind by the invention, in which the rectifier modules are fastened to cantilevers of a flange-on carrier disk from the inside. The accommodation of the interconnections and arrangement of terminal points is used in the Traegerscheibe molded annular channel system with sternfoermig extending side canals, which is cast after completion of the switching connections with a Gieszharz. Fig. 2 {three-phase synchronous generators; Rectifier arrangement; Rectifier diodes; Diode module; Traegerkoerper; cantilevers; Ring channel system; Seitenkanaele; Nip; Interconnections; Gieszharz}

Description

- The support has four circumferentially distributed, directed parallel to the axis of rotation, at the same distance from one another standing cantilever arms, of which three are provided for receiving the rectifier modules and one for the Varistoratz,

- In the profile of the carrier a concentric with the shaft center located annular channel with four evenly distributed, provided in the gaps of the cantilever side channels are provided,

arranged in the side channels parallel to the axis of rotation, electrically insulated terminal bolts are arranged,

- The terminal pins are polarized in pairs and form the DC-side connection or connection points for the leads to the rotor winding of the generator and

- the connecting cables are laid within the rectifier set in the cable system and are encapsulated with a casting resin including the terminal bolts.

As a carrier, an aluminum casting is preferably provided.

embodiment

The invention will be described in more detail using an exemplary embodiment

 Show it:

1 is a view of the entire rectifier arrangement,

Fig. 2: the rectifier arrangement as a sectional view

3 shows a clamping or connection point in section along section line B-B in FIG. 1.

At the disc-like support 1 of the rectifier arrangement cantilevers 2 are formed, which the rectifier modules 3; 3 '; 3 "and the Varistoratz record 4. Furthermore, concentric with the cantilevers of the ring channel 5 and the side channels 6, 6 ', 6" and 6' "arranged. In these side channels terminal pins 7 are provided, which by Isolierscheiben and rings against the The switching connections 8 are inserted into the channels and, after assembly, to the rectifier modules, terminal bolts and the varistor set with a potting compound 9. The thrust washer 10 and fastening screws 12 serve for the frontal flanging of the rectifier arrangement to an indicated stub shaft 11 of the synchronous machine s generator carried by an axial bore through the shaft and a bore through the carrier and in channels through the pressure washer made of insulating material, the latter ensures all carried cable reliable against radial swinging.

By a symmetrical division of the rectifier modules and arrangement of an approximately balanced Varistoratzes creates a low-unbalance rectifier arrangement, which is a protected against vibration component. The spaces left between the cantilevers allow an intensive air flow passage, with the help of a good dissipation of the resulting heat in the rectifier modules and the varistor set is achieved.

Claims (3)

1. Rotating rectifier arrangement for three-phase synchronous generators with a disc-like support and extending parallel to the axis of rotation approaches for receiving radially to the machine axis secured rectifier modules and concentric inner lying switching connections, characterized in that the carrier four distributed around the circumference, directed parallel to the axis of rotation at the same distance from each other has standing cantilever arms, three of which are provided for receiving the rectifier modules and one for the Varistoratz, in the profile of the carrier a concentric to the shaft center located annular channel with four evenly distributed, provided in the gaps of the cantilevers side channels are provided in the side channels parallel to Rotary axis directed, electrically insulated terminal pins are arranged, the terminal pin, polarized in pairs, the DC-side connection or connection points for the leads to the rotor winding of the generator b and the connecting cables are laid within the rectifier set in the duct system and encapsulated with a cast resin including the terminal studs. 2. Rotating rectifier arrangement according to claim 1, characterized in that the carrier is formed by a molded part, preferably cast aluminum. For this 3 pages drawings Field of application of the invention The invention relates to a rotating rectifier arrangement for three-phase synchronous generators, with which the exciting current from the armature of a Wechselstromerregermaschine rectified the rotor winding of a synchronous generator is supplied. In principle, the rectifier arrangement according to the invention can be used in electric machines, where alternating current is converted into direct current in the rotating part. Characteristic of the known state of the art It is known to arrange rectifier diodes according to the circuits selected, individually or in groups, on rotating carriers made of insulating material, wherein the formation of bridge circuits is connected with the corresponding expense of connections with leads. On the other hand, it is also known to arrange differently polarized rectifier diodes on electrically conductive carriers such that a carrier has positive potential and a second carrier negative potential. Such embodiments are described for example in DE-OS 1613377 and 2211 180 (Pat. Kl. 21 d ¹ , Gr.47). Despite the application of so-called carrier wheels made of cast aluminum for receiving the rectifier diodes but still diverse fasteners whose manufacture and assembly is associated with considerable effort. However, these parts are not only exposed to the effects of centrifugal force during operation of the machine but also to vibrations that can lead to fatigue fractures. However, it is also known to restrict the accumulation of switching connections when using potential-free rectifier modules. However, the known solutions have disadvantages in terms of susceptibility to interference and destruction of the terminal contacts and connecting elements between the rectifiers under load with torsional vibrations by the drive of the machine by means of an internal combustion engine. Object of the invention The object of the invention is a rectifier arrangement for rotating rectifier with the greatest possible insensitivity to vibrations, which are unavoidable in the drive of three-phase synchronous generators by internal combustion engines. The arrangement should have an uncomplicated and easy to assemble construction and a good ventilation and represent an assembly that requires only the mounting of the assembly itself and the clamping of the supply and discharge lines in the assembly process of the generator. Explanation of the essence of the invention The invention has for its object to provide a rotating rectifier arrangement in which even under the action of forces by rotation, no change in position of the rectifier modules and bending and vibration stress can occur in the compounds. For this purpose, the rectifier arrangement is to make a solid component.
The object is achieved by a rectifier arrangement, in accordance with the invention