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An American Rotary Phase Converter with a Transformer. A phase converter is a device that converts electric power provided as single phase to multiple phase or vice versa. The majority of phase converters are used to produce three-phase electric power from a single-phase source, thus allowing the operation of three-phase equipment at a site that only has single-phase electrical service.
Rotary phase converters are used to produce a single-phase for the single overhead conductor in electric railways. [ citation needed ] Five European countries ( Germany , Austria , Switzerland , Norway , and Sweden ), where electricity is three-phase AC at 50 Hz , have standardised on single-phase AC at 15 kV 16 + 2 ⁄ 3 Hz for railway ...
Such converters may also allow the frequency to be varied, allowing speed control. Some railway locomotives use a single-phase source to drive three-phase motors fed through an electronic drive. [30] A rotary phase converter is a three-phase motor with special starting arrangements and power factor correction that produces balanced three-phase ...
When three-phase is needed but only single-phase is readily available from the electricity supplier, a phase converter can be used to generate three-phase power from the single phase supply. A motor–generator is often used in factory industrial applications.
Wiring schematic for a simplified bipolar field Gramme ring single-phase to direct current rotary converter. (In actual use, the converter is drum-wound and uses a multipolar field.) [2] Wiring schematic for a simplified two-phase to direct current rotary converter, with the second phase connected at right angles to the first. [3]
There are also devices and methods to convert between power systems designed for single and three-phase operation. The standard power voltage and frequency vary from country to country and sometimes within a country.
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