Abstract: A wind turbine assembly including a rotor system, a generator, a first converter, a second converter, and a controller system. The first converter includes a first bridge circuit having a plurality of switch members each having a controllable switch. The second converter includes a second bridge circuit having a plurality of switch members each having a controllable switch. The controller system is adapted to provide a drying operation for second converter including short circuiting the second converter with the controllable switches of the second bridge in circuit, and supplying power from the generator through the first converter to the short circuited second converter for drying the second converter.

Abstract: A wind turbine assembly including a rotor system, a generator, a first converter, a second converter, and a controller system. The first converter includes a first bridge circuit having a plurality of switch members each having a controllable switch. The second converter includes a second bridge circuit having a plurality of switch members each having a controllable switch. The controller system is adapted to provide a drying operation for second converter including short circuiting the second converter with the controllable switches of the second bridge in circuit, and supplying power from the generator through the first converter to the short circuited second converter for drying the second converter.

Abstract: Examples are disclosed herein that relate to avoiding mechanical noise from operation of a vibrational output device. One example provides a computing device including a processor and a storage device storing instructions executable by the processor to vary a drive voltage applied to a vibrational output device, receive acoustic data, and from the acoustic data detect a noise signal from the vibrational output device as the drive voltage is varied. The instructions are further executable to, based upon the detected noise signal, select an operational drive voltage for the vibrational output device, and operate the vibrational output device using the operational drive voltage.

Abstract: The description relates to computing devices, such as mobile computing devices employing mesh covers. One example can include a frame that defines a perimeter of the device. An inwardly facing portion of the frame can define a recess that has opposing upper and lower surfaces. A self-retaining assembly can be positioned in the recess and can expand against the upper and lower surfaces to retain the self-retaining assembly in the recess without external mechanisms.

Abstract: The description relates to computing devices, such as mobile computing devices employing mesh covers. One example can include a frame that defines a perimeter of the device. An inwardly facing portion of the frame can define a recess that has opposing upper and lower surfaces. A self-retaining assembly can be positioned in the recess and can expand against the upper and lower surfaces to retain the self-retaining assembly in the recess without external mechanisms.

Abstract: Examples are disclosed herein that relate to avoiding mechanical noise from operation of a vibrational output device. One example provides a computing device including a processor and a storage device storing instructions executable by the processor to vary a drive voltage applied to a vibrational output device, receive acoustic data, and from the acoustic data detect a noise signal from the vibrational output device as the drive voltage is varied. The instructions are further executable to, based upon the detected noise signal, select an operational drive voltage for the vibrational output device, and operate the vibrational output device using the operational drive voltage.

Abstract: Single-phase to three-phase converter comprising a rectifier stage, a DC link and an inverter stage, wherein the rectifier comprises a filter choke, one controllable switch for power factor correction, rectifying diodes arranged in a diode bridge configuration having input terminals and output terminals, the controllable switch being connected to the output terminals of the diode bridge, an upper blocking diode arranged between the positive output terminal of the diode bridge and the positive input of the DC link and a lower blocking diode arranged between the negative output terminal of the diode bridge and the negative input of the DC link, the DC link comprises a capacitor bank connected between the DC link, which capacitor bank has a center point.

Abstract: The invention relates to a frequency converter (1) comprising: a processor (2), a memory (3) containing software, which during operation of the frequency controller (1) is executed by said processor for controlling the operation of the frequency converter, and a serial interface (7). In order to provide a solution for retrieving and analyzing parameters available from the frequency converter in an easy and cost efficient way, said frequency converter is configured to store during use of the frequency converter parameters relating to the operation of said frequency converter to a detachable memory (8) attached to said serial interface (7).