RU2105405C1 - Like-pole inductor generator with built-in power rectifier - Google Patents

Abstract

FIELD: electrical engineering and electromechanical engineering; off-line power supplies for DC arc welding, wind-electric generators, or plants where two voltage levels are required. SUBSTANCE: generator has two stator stacks carrying multiphase armature winding and diamagnetic ring with air intake ports provided between them, as well as two rotor stacks press-fitted onto common shaft concentrically to stator stacks. Each stator winding is connected to respective rectifier unit. EFFECT: provision for organizing separate magnetic system and producing two voltage levels or higher current at generator output for arc welding. 2 dwg

Description

 The invention relates to electrical engineering and can be used as a stand-alone source of electricity during DC arc welding, in wind generators or installations requiring two voltage levels.

 Known welding DC generators have such disadvantages as large mass and size indicators and the presence of a brush-collector assembly (see I.A. Danilov, K.V. Lototsky "Electric Machines" M .: Kolos, 1972, p. 90) .

 Also known are the designs of welding brushless inductor DC generators with a built-in power rectifier. Closest to the proposed invention relates to the same-pole two-package generator with an excitation winding located between the stator packets (see BZ Nesterov "High-frequency electric welding generators" L .: Energy, 1978, p. 6.).

 The well-known two-pack inductor generator with an excitation coil located between the packages has a difficult temperature regime during welding due to poor ventilation of the armature windings, as well as low manufacturability of the generator assembly.

 A pole-type inductor generator with an integrated power rectifier is proposed, containing two stator packages with a multiphase anchor winding, between which a diamagnetic ring with air intake windows, two rotor packages mounted on a common shaft concentrically to the stator packages, two magnetically conductive bearing shields with excitation windings are installed.

 The magnetic system is divided into two independent from each other magnetic circuit, which allows the generator to run at two voltage levels and unload the diodes of the built-in rectifier.

 In FIG. 1 shows a longitudinal section of the same-pole inductor generator with a power rectifier; in FIG. 2 - electrical circuit.

 The proposed same-pole inductor generator with built-in power rectifier (Fig. 1) contains a package of stator 1, a package of stator 2 with anchor windings; diamagnetic ring 3 with air intake windows; two packages of rotor 4 and 5, mounted on a common shaft 6; two excitation coils 7 and 8, wound on steel sleeves, attached to the magnetic conductive bearing shields 9 and 10; the housing of the power rectifier unit 11, on which the heatsinks 12 and 13 of the positive diodes are mounted. Between the bearing shield and the case of the power rectifier is a centrifugal fan 14.

 The proposed generator operates as follows.

 A diamagnetic ring 3 with air intake windows installed between the packages of stators 1 and 2 divides the generator into two independent generators with a common shaft and with its own independent magnetic excitation system. The impeller 14, installed between the bearing shield 10 and the housing of the power rectifier 11, creates an air discharge, where the flow of cooling air rushes through the windows in the diamagnetic ring 3 and the bearing shield 9.

 Each stator package 1 and 2 with anchor windings independently operate on their rectifiers 12 and 13, respectively. During welding, the plus bolts of the rectifiers 12 and 13 are connected in parallel, which allows you to obtain the necessary welding current.

 If it is necessary to obtain an energy source at two voltage levels, each of the stators can be wound on the required voltage, which allows a separate magnetic system, which also reduces the path for the passage of magnetic flux and thereby reduces losses in iron and overheating of the generator.

 Thus, a two-pack generator with a diamagnetic ring between the packets allows to obtain a large specific power, improve the temperature regime and manufacturing technology of relatively narrow stators.

Claims (1)

 The same-pole inductor generator with built-in power rectifier, containing two stator packages, two rotor packages, characterized in that the generator is divided into two independent generators on one shaft, for which there is a diamagnetic ring between the stator packages, each stator has its own independent rectification system, and coils excitations are located in magnetically conductive bearing shields on both sides of the generator.

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