CIRCUIT FOR REVERSING THE ROTATION SENSE OF A D.C. MOTOR

1. A circuit arrangement for reversing the direction of rotation of a d.c. motor, in particular a d.c. miniature motor for operating dentistry tools, characterized in that a high frequency alternating voltage (UG ) is superimposed onto the motor voltage from a pulse generator (7), a blocking element...

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Bibliographische Detailangaben
Hauptverfasser:	KISSEL, HEINZ, PABST, JOSEF
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DENTISTRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY GENERATION HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE SYSTEMS FOR STORING ELECTRIC ENERGY TRANSMISSION
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Beschreibung
Zusammenfassung:	1. A circuit arrangement for reversing the direction of rotation of a d.c. motor, in particular a d.c. miniature motor for operating dentistry tools, characterized in that a high frequency alternating voltage (UG ) is superimposed onto the motor voltage from a pulse generator (7), a blocking element (choke 13) isolates the superimposed voltage from the motor supply (voltage source 2) and a switching element (switch 10) connects a capacitor (9) in parallel with the d.c. motor (1) when it is operated, whereby a voltage jump (Figure 2b) is produced in the control line of the pulse generator (7), and a switching stage (5) is provided which converts the voltage jump into a switching pulse to reverse the polarity of the motor terminals via a relay (4).