DRIVE UNIT FOR A WINDOW WIPER SYSTEM

A drive unit for a window wiper system having an electronically commutated drive motor, which has a rotor and phase conductors for providing a stator magnetic field; a reversing transmission, which controls one or more wiper arms of a wiper unit in a pivoting motion with alternating direction; a pow...

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Bibliographische Detailangaben
1. Verfasser:	NIEHAUS, Christopher Daniel
Format:	Patent
Sprache:	eng
Schlagworte:	CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION PERFORMING OPERATIONS SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, ORMANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	A drive unit for a window wiper system having an electronically commutated drive motor, which has a rotor and phase conductors for providing a stator magnetic field; a reversing transmission, which controls one or more wiper arms of a wiper unit in a pivoting motion with alternating direction; a power unit, which provides phase voltages to the drive motor based on control signals and which has a device for measuring phase currents through the phase conductors; and a control unit, which determines a rotor position of the rotor of the drive motor based on the phase currents without using any sensors to generate the control signals based on the rotor position to provide a drive torque and to control rotational speed based on a specified operating function.