Two-step connection of electric motors by means of electromagnetic switches

A method and apparatus using electromagnetic switching in a two-step connection process is provided to minimize surge currents and torque oscillations in three-phase motors during starts.

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Bibliographische Detailangaben
Hauptverfasser:	James J. Kinsella, Christopher J. Wieloch, Peter Unsworth
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRIC ELEMENTS CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC SWITCHES ELECTRICITY EMERGENCY PROTECTIVE DEVICES GENERATION RELAYS RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE SELECTORS WAVEGUIDES
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Beschreibung
Zusammenfassung:	A method and apparatus using electromagnetic switching in a two-step connection process is provided to minimize surge currents and torque oscillations in three-phase motors during starts.