Abstract: A braking controller arrangement, a drive system, a vehicle, and a method of control. The braking controller arrangement includes a link circuit, a first semiconductor, a second semiconductor, a third semiconductor, a fourth semiconductor, and a resistor. The link circuit is electrically connected to terminals of a battery. The semiconductors are configured to be operated with a duty cycle of 50%.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A motor driven hand power tool has a saw including a saw blade, a separating tool formed as a saw blade movable about a tilting axis extending parallel to a cutting line of sight and fixable in each turning position relative to a workpiece which is subdivided by a cutting joint into a product-side and a refuse-side with product and refuse-side cutting edges, a base plate over which the saw blade is positioned. The saw blade is arranged so that the tilting axis extends at a distance under a lower side of the base plate, and the distance is dimensioned so that the tilting axis in a working position of the power tool is located under an upper surface of the workpiece in an interior of the workpiece.