Siemens Aktiengesellschaft

Valeo Eautomotive Germany Gmbh

Thomas Demuth

Gunther Birk

Steffen Hellmich

Andres Männer

Markus Mauersberger

Karsten Ahnert

Sebastian Ebersberger

Bin Ismail Muhamad Ikhwan

A pitch system of a wind energy system includes an emergency energy store for moving a rotor blade into a safety position in the event of the failure of an external energy supply. The emergency energy store can be tested, for example to assess aging, by supplying electrical energy to an actuating device configured to set a pitch angle of a rotor blade even in a normal operating mode of the wind energy system temporarily exclusively from the emergency energy store. This configuration ensures reliable operation of a wind energy system.

Pitch system for a wind energy system and method for operating a pitch system

A compensation of cyclical interferences occurring during operation of motor controlled by an electrical motor drive comprising the controllable motor and a speed governor, wherein a position determiner is provided for continuously determining a position of said motor, responsive to a position signal indicative of said position of said motor and wherein a load observer responsive to a first output signal received from said position determiner and to a second output signal received from the speed governor is provided for generating a load signal indicative of an estimated load and continuously applying said load signal to an output of the speed governor.

Electrical motor drive and method for operating such electrical motor drive

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Limbach-Oberfrohna, Germany

Thomas Demuth