Ebm Elektrobau Mulfingen Gmbh & Co.

Wilhelm Reinhart

Helmut Lipp

Karl-Heinz Schultz

The invention pertains to a control circuit for a collectorless DC motor where at least one power transistor (14, 16) is input-connected to each stator coil (2, 4) of the motor; said transistor is driven by at least one rotor position sensor, especially a Hall generator having commutation circuits to commute the motor current, and where a blocking protection device is provided to interrupt the motor current in an overload or blockage. The blocking protection device (26) has at least one semiconductor circuit (30) carrying the motor current which is switched through or blocked depending on its temperature.

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Schrozberg-Gutbach, Germany

Wilhelm Reinhart