Elektrische Motorkettensäge

A motor-driven chain saw is electrically operated by means of a universal motor and has two brake systems operating independently of one another. A mechanical brake system serves as a safety brake and when actuated, the mechanical brake system brings the saw chain to a standstill instantaneously. Th...

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Bibliographische Detailangaben
Hauptverfasser:	ABOU-ALY, MOHAMED, RIES, HARTMUT, WIELAND, DIETER
Format:	Patent
Sprache:	ger
Schlagworte:	ACCESSORY MACHINES OR APPARATUS BLASTING BRAKES CLUTCHES COMPONENTS OR ACCESSORIES THEREFOR CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER COUPLINGS FOR TRANSMITTING ROTATION ELECTRICITY ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERATION HEATING LIGHTING MECHANICAL ENGINEERING NAILING OR STAPLING MACHINES IN GENERAL PERFORMING OPERATIONS SAFETY DEVICES, e.g. THOSE FOR SAWS SAWS FOR WOOD OR SIMILAR MATERIAL THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL
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Beschreibung
Zusammenfassung:	A motor-driven chain saw is electrically operated by means of a universal motor and has two brake systems operating independently of one another. A mechanical brake system serves as a safety brake and when actuated, the mechanical brake system brings the saw chain to a standstill instantaneously. The second brake system is an electric coasting brake, which when the switch is released stops the saw chain quickly but without recoil. The electrical braking is effected by reversing the polarity of one pole coil of the field winding and short-circuiting it with the rotor winding.