Abstract: A sealing arrangement of a wind turbine is provided including an axial seal, a stationary member and a generator rotor for sealing a gap between the stationary member and the generator rotor. Accordingly, the stationary member is arranged between a lubricant chamber and an air chamber and the generator rotor is configured to rotate about a rotational axis, wherein the seal is arranged at an end of the stationary member. The seal includes a first lip configured to contact the generator rotor and the first lip is configured to allow a leakage of lubricant at the contact between the first lip and the generator rotor. The seal further includes a second lip arranged radially outwards with respect of the first lip and the rotational axis.

Abstract: A sealing arrangement of a wind turbine is provided including an axial seal, a stationary member and a generator rotor for sealing a gap between the stationary member and the generator rotor. Accordingly, the stationary member is arranged between a lubricant chamber and an air chamber and the generator rotor is configured to rotate about a rotational axis, wherein the seal is arranged at an end of the stationary member. The seal includes a first lip configured to contact the generator rotor and the first lip is configured to allow a leakage of lubricant at the contact between the first lip and the generator rotor. The seal further includes a second lip arranged radially outwards with respect of the first lip and the rotational axis.

Abstract: The present disclosure relates to a gradient structure (100) for transmitting and/or reflecting an electromagnetic signal. The gradient structure comprises a plurality of interconnected cells (110). Each cell comprises a through cavity (112) surrounded by walls (111), wherein the walls of each cell have a gradually varying thickness along a longitudinal direction of each cell. The present disclosure also relates to a cover structure (200) comprising the gradient structure (100), a system (300) comprising the cover structure (200), a structure element (400) having integrated therein the system (300) and to a method for optimizing the transmittance and/or reflectance of an electromagnetic signal of a gradient structure.

Abstract: The present disclosure relates to a gradient structure (100) for transmitting and/or reflecting an electromagnetic signal. The gradient structure comprises a plurality of interconnected cells (110). Each cell comprises a through cavity (112) surrounded by walls (111), wherein the walls of each cell have a gradually varying thickness along a longitudinal direction of each cell. The present disclosure also relates to a cover structure (200) comprising the gradient structure (100), a system (300) comprising the cover structure (200), a structure element (400) having integrated therein the system (300) and to a method for optimizing the transmittance and/or reflectance of an electromagnetic signal of a gradient structure.

Abstract: Provided is a bearing unit for a rotor unit of a wind turbine, including a first bearing ring, a second bearing ring, a plurality of rolling elements and a sealing member including a sealing member base portion, a first sealing member tip portion and a second sealing member tip portion, wherein the first sealing member tip portion abuts a first wall of the first bearing ring and the second sealing member tip portion abuts a second wall of the bearing unit, wherein the sealing member is configured and arranged such that a first contact pressure between the first sealing member tip portion) and the first wall is transmitted through the sealing member to the second sealing member tip portion to increase a second contact pressure between the second sealing member tip portion and the second wall. Also provided is a wind turbine.

Abstract: Provided is a bearing unit for a rotor unit of a wind turbine, including a first bearing ring, a second bearing ring, a plurality of rolling elements and a sealing member including a sealing member base portion, a first sealing member tip portion and a second sealing member tip portion, wherein the first sealing member tip portion abuts a first wall of the first bearing ring and the second sealing member tip portion abuts a second wall of the bearing unit, wherein the sealing member is configured and arranged such that a first contact pressure between the first sealing member tip portion) and the first wall is transmitted through the sealing member to the second sealing member tip portion to increase a second contact pressure between the second sealing member tip portion and the second wall. Also provided is a wind turbine.

Abstract: System for pulse-width-modulated class D audio amplifiers. In one preferred embodiment an adder is described to generate a difference signal responsive to an input signal and a feedback signal, a pulse-width-modulator coupled to the adder to compare the difference signal to a reference signal and produce a pulse-width-modulated signal based on the comparing, a filter coupled to an output of the pulse-width-modulator, and a loop filter having a first input coupled to the output of the filter and a second input coupled to the input of the filter, the loop filter to generate a feedback signal by applying transfer functions to signals at its inputs. The loop transfer function of the amplifier is minimum aliasing error transfer function. The minimum aliasing error properties provide low distortion and taking the feedback from the output of the filter reduces high frequency output impedance.

Abstract: One embodiment of an apparatus for filtering an electrical signal includes a loop filter with an input and an output that applies a transfer function to a signal at the input. The transfer function has substantially no real part. The loop filter has a dominant pole placed substantially at or above an upper frequency in the frequency range of interest for the loop filter.

Abstract: System for pulse-width-modulated class D audio amplifiers. In one preferred embodiment an adder is described to generate a difference signal responsive to an input signal and a feedback signal, a pulse-width-modulator coupled to the adder to compare the difference signal to a reference signal and produce a pulse-width-modulated signal based on the comparing, a filter coupled to an output of the pulse-width-modulator, and a loop filter having a first input coupled to the output of the filter and a second input coupled to the input of the filter, the loop filter to generate a feedback signal by applying transfer functions to signals at its inputs. The loop transfer function of the amplifier is minimum aliasing error transfer function. The minimum aliasing error properties provide low distortion and taking the feedback from the output of the filter reduces high frequency output impedance.

Abstract: One embodiment of an apparatus for filtering an electrical signal includes a loop filter with an input and an output that applies a transfer function to a signal at the input. The transfer function has substantially no real part. The loop filter has a dominant pole placed substantially at or above an upper frequency in the frequency range of interest for the loop filter.

Abstract: A switch-mode modulator operating at a two-level voltage and including an alternating output stage (3), an optional output filter (5) and a feedback including a function block (14) with a transfer function (MFB). The modulator furthermore includes a forward block (12) provided with means for calculating the difference between the signal (14a) originating from the function block (14) and a reference signal (REF) as well as with a transfer function (MFW). The output (13) of the forward block (12) is the input of a Schmitt-trigger (9), which generates switch on signals (2) for changing the output stage. The output voltage (VOUT) of the modulator applying either after the optional output filter (5) or the output stage (3) is fed back through the function block (14) so as to generate the signal (14a) fed back.

Abstract: Based on a non-orderly flow of supplied articles, which may also be sticky articles of food, there is effected in a compulsory manner an isolation of mutually separated small article portions, which are moved through a weighing station (20) and thereafter brought together selectively into larger portions, e..g, with a predetermined weight. In a preferred system according to the invention use is made of an endless row of carrier trays (12) which, in two straight runs, pass along a number of receiver containers (22), into which they are selectively emptied after having passed the weighing station. In front of this station distributor means (14, 18) are provided above a horizontal reversing path of the tray chain for ensuring that the supplied articles are distributed to the trays without overlapping therebetween. Various advantageous embodiments of the single parts of the system to work with a desirably high capacity.