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  2. Free-piston linear generator - Wikipedia

    en.wikipedia.org/wiki/Free-piston_linear_generator

    The free-piston engine linear generators can be divided in 3 subsystems: [1] [2] One (or more) reaction section with a single or two opposite pistons; One (or more) linear electric generator, which is composed of a static part (the stator) and a moving part (the magnets) connected to the connection rod.

  3. Baumslag–Solitar group - Wikipedia

    en.wikipedia.org/wiki/Baumslag–Solitar_group

    BS(1, 1) is the free abelian group on two generators, and BS(1, −1) is the fundamental group of the Klein bottle. The groups were defined by Gilbert Baumslag and Donald Solitar in 1962 to provide examples of non-Hopfian groups. The groups contain residually finite groups, Hopfian groups that are not residually finite, and non-Hopfian groups.

  4. Electric generator - Wikipedia

    en.wikipedia.org/wiki/Electric_generator

    Electromagnetic generators fall into one of two broad categories, dynamos and alternators. Dynamos generate pulsing direct current through the use of a commutator. Alternators generate alternating current. Mechanically, a generator consists of a rotating part and a stationary part which together form a magnetic circuit:

  5. Van de Graaff generator - Wikipedia

    en.wikipedia.org/wiki/Van_de_Graaff_generator

    A more recent development is the tandem Van de Graaff accelerator, containing one or more Van de Graaff generators, in which negatively charged ions are accelerated through one potential difference before being stripped of two or more electrons, inside a high-voltage terminal, and accelerated again. An example of a three-stage operation has ...

  6. Dynamo - Wikipedia

    en.wikipedia.org/wiki/Dynamo

    "Dynamo Electric Machine" (end view, partly section, U.S. patent 284,110) A dynamo is an electrical generator that creates direct current using a commutator.Dynamos were the first electrical generators capable of delivering power for industry, and the foundation upon which many other later electric-power conversion devices were based, including the electric motor, the alternating-current ...

  7. Single-phase generator - Wikipedia

    en.wikipedia.org/wiki/Single-phase_generator

    In this two-pole design, as the armature rotates one revolution, it generates one cycle of single phase alternating current (AC). To generate an AC output, the armature is rotated at a constant speed having the number of rotations per second to match the desired frequency (in hertz ) of the AC output.