Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A DC-Autotransformer based Multilevel Inverter for Automotive
  Applications   This paper proposes a novel multilevel inverter for automotive applications.
The topology consists of a modular DCDC converter and a tap selector, where the
DC-DC converter provides several DC-output levels and the tap selector produces
an AC signal by choosing different DC-output signals from the DC-DC converter.
To produce the DC-levels, the DC-DC converter consists of a modular structure
where the modules are connected in series. The novelty is that the modules are
connected both, magnetically in the AC-domain and electrically in the DCdomain.
Due to the usage of low power switches in the modules, the proposed structure
provides high efficiency. Furthermore, the DC-DC converter is capable of
self-balancing its modules and thus does not require large capacitors which
yields a high power density. A prototype of the proposed converter is built and
simulation, as well as experimental results, are used to verify the findings.

14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
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The categories of this paper are: chem-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom