Abstract: The invention relates to a wind turbine (1) with a pitch drive (3) for rotor blade adjustment, whereby the drive regulation (31) of the pitch drive (3) responds to disturbance torques (SM) during operation of the wind turbine (1) so as to have an equalizing effect, and the invention also relates to a corresponding method for the drive regulation (31). For this purpose, the wind turbine (1) comprises at least one load sensor (4) that is arranged in the vicinity of the pitch drive (3) in order to determine the mechanical load being exerted on the drive mechanism (A) due to a disturbance torque (SM), and said load sensor is also provided in order to emit a sensor signal (SS) corresponding to the mechanical load, and the drive regulation (31) comprises a feedback means (311) for the feedback (R) of an evaluated torque signal (BDS) on the basis of the sensor signal (SS).

Abstract: The invention relates to a wind turbine (1) with a pitch drive (3) for rotor blade adjustment, whereby the drive regulation (31) of the pitch drive (3) responds to disturbance torques (SM) during operation of the wind turbine (1) so as to have an equalizing effect, and the invention also relates to a corresponding method for the drive regulation (31). For this purpose, the wind turbine (1) comprises at least one load sensor (4) that is arranged in the vicinity of the pitch drive (3) in order to determine the mechanical load being exerted on the drive mechanism (A) due to a disturbance torque (SM), and said load sensor is also provided in order to emit a sensor signal (SS) corresponding to the mechanical load, and the drive regulation (31) comprises a feedback means (311) for the feedback (R) of an evaluated torque signal (BDS) on the basis of the sensor signal (SS).

Abstract: A converter system with a rectifier (1) and at least two inverters (2) is described and depicted, wherein the rectifier (1) can be supplied with energy from an alternating current source (3), the rectifier (1) is connected to each of the inverters (2) via a common direct voltage circuit (4) in order to supply energy to the inverters (2) and each inverter (2) can be connected to a respective electrical load (5) in order to supply energy to the respective electrical load (5). According to the invention, a converter system that is especially reliable is realized in that a decoupling device (6) is arranged in at least one of the connections between the direct current circuit (4) and one of the inverters (2), wherein the decoupling device (6) prevents electrical energy coming from the inverter (2) from being transmitted in the direction of the direct current circuit (4).

Abstract: An emergency power supply device is provided to supply emergency power to a direct voltage circuit. The direct voltage circuit has a first potential tap and a second potential tap, comprising an energy storage unit. The energy storage unit has a plus pole and a minus pole, and one of the poles is connected to the first potential tap via a first connection. The other pole is connected to the second potential tap via a second connection. At least one of the connections has a directional electric current meter and at least one of the connections has an interrupter. The directional electric current meter can measure a flow of charging current. The interrupter can prevent a flow of charging current, and the interrupter can be controlled as a function of the flow of charging current that has been measured.

Abstract: A method for charging an electric emergency energy storage device (1) comprising the following steps: predicting the energy demand EB of the energy consumer (2), determining the capacitance C of the emergency energy storage device (1) and the internal resistance Ri of the emergency energy storage device (1), calculating a charging voltage UL, whereby the charging voltage UL is calculated in such a way that the energy EC stored in the emergency energy storage device (1) at this charging voltage UL is just enough to meet the predicted energy demand EB, taking into account losses that occur, especially at the internal resistor Ri, and charging or discharging the emergency energy storage device (1) until the calculated charging voltage UL has been reached.

Abstract: An emergency power supply device is provided to supply emergency power to a direct voltage circuit. The direct voltage circuit has a first potential tap and a second potential tap, comprising an energy storage unit. The energy storage unit has a plus pole and a minus pole, and one of the poles is connected to the first potential tap via a first connection. The other pole is connected to the second potential tap via a second connection. At least one of the connections has a directional electric current meter and at least one of the connections has an interrupter. The directional electric current meter can measure a flow of charging current. The interrupter can prevent a flow of charging current, and the interrupter can be controlled as a function of the flow of charging current that has been measured.