BBÖ 1082

The 1082.01 was an electric locomotive for operation with 15 kV catenary voltage at 16 2 ⁄ 3  Hertz, which was equipped with a rotating phase converter and DC traction motors.
== History ==
The first long-distance railway power supplies with single-phase alternating current were operated at the unusual frequency of 16 2 ⁄ 3  Hertz, because at 50 Hz the commutation , i.e. the power transmission to the rotor windings of the single-phase alternating current motor, would have been very problematic. In contrast, direct current motors were easier to control and three-phase asynchronous motors easier to maintain, which is why attempts were made to convert electricity on the traction unit. The locomotives BBÖ 1180 and BBÖ 1470 of the company Ganz & Co. were unsuccessful attempts with synchronous converters and asynchronous traction motors . In 1931 the Austrian Siemens-Schuckert-Werke wanted to test a new concept with a phase converter generator for direct current operation with alternating current supply. It was originally planned to equip the last machine in the 1080.1 series with this phase converter. It turned out, however, that there was not enough space for this. So finally a new locomotive was built with a rotating phase changer generator.
While the electrical equipment was supplied by Österreichische Siemens Schuckert Werke, the mechanical part came from Lokomotivfabrik Floridsdorf. The 1082 was first stationed in Salzburg, later in Bludenz, from where it was used very satisfactorily in scheduled operations. However, the complicated structure of the converter system and its control required constant support from the manufacturer and was therefore not taken over by the BBÖ.
The Deutsche Reichsbahn classified them as E 88.3 in 1938, but then their traces are lost. In 1945 she could no longer be found.
== Technology ==
From the pantographs, the current reached the main transformer via the main oil switch. This was provided with two secondary windings, which reduce the voltage to about 600 V. With the help of the phase converter, the single-phase alternating current was converted into a three-phase current, from which two frequency converters generated direct current.
The converter plant consisted of four rotating machines arranged from front to rear as follows:
* Exciter that also served as the starter motor for the converter
* frequency converter 2
* phase converter
* Frequency converter 1
The phase converter was built as a four-pole synchronous machine with external poles and a damper winding. The voltage of the two secondary windings was fed to it from the transformer via slip rings. The rotor was also provided with the two windings for generating the three-phase voltage for the frequency converters, which were connected to the converter set via the hollow shaft of the converter set. The rotors of the frequency converters were equipped with direct current rotors and the direct current was drawn via movable brushes, which allowed the traction motor voltage to be continuously regulated. In order to compensate for the magnetizing current of the phase converter, the frequency converters were connected in series.
The converter set was seven meters long and housed in a cylindrical housing. Behind it was the transformer and the only driver's cab. This made the vehicle look like a steam locomotive with attached pantographs. The vehicle had an engine similar to the 1080.1 series, but with two additional running axles. The middle three axles were provided with separately excited suspension motors and the end axles were connected to the driven axles with coupling rods.
The design of the vehicle was 50 years ahead of its time. The basic idea of ​​power conversion on the traction vehicle is now realized with the help of semiconductor components and also with three-phase asynchronous motors, which are much easier to build and operate.
Category:Austrian locomotives
Category:Built in 1931
Category:Electric locomotives
Category:Standard gauge locomotives
Category:Locomotives
Category:Siemens locomotives
Category:Austria