About 21 results
https://drivepatents.com/patents/1082187 · 24 Nov 2004
The device has at least one static frequency changer drive system (4) with first and second sub-devices (2,3) connected by a d.c. circuit (5) and the first sub-device connected to an a.c. source (1) via a transformer (8) and a supply network configuration ...
https://drivepatents.com/patents/1088905 · 17 Mar 2004
A partial converter system (2) includes a branch pair (3) comprising two series-connected driven power semiconductor switches with each having a diode reverse-connected in parallel. The branch pair is connected in parallel with branch pairs (13,14) connect...
https://drivepatents.com/patents/1092936 · 1 Oct 2003
The method involves disconnecting a voltage source (2) from a transformer (1) when an output current (iA) exceeds a maximum permissible value. An output voltage (uA) is formed in response to a start signal (Ss), as a function of a transformer voltage that ...
https://drivepatents.com/patents/1093774 · 27 Aug 2003
The method involves operating a remote tripping device that has two detectors (1, 2), to receive a signal at the same frequency but for different transmission times. A non-exclusive OR logic link (5) between the two detectors forms an output (6) of the det...
https://drivepatents.com/patents/1097296 · 26 Mar 2003
The device has a drive unit coupled to a generator and connected via a rectifier to a d.c. intermediate circuit, a static converter connected to the intermediate circuit with multiple a.c. output connections and a filter arrangement connected to the a.c. o...
https://drivepatents.com/patents/1098308 · 19 Feb 2003
The charging voltages (U(LA),U(LB),U(LC)) are generated in response to a drive signal, such that the charging currents (I(LA),I(LB),I(LC)) injected in the corresponding phases (A,B,C) is proportional to a phase system voltages (U(NA),U(NB),U(NC)) of corres...
https://drivepatents.com/patents/1099021 · 15 Jan 2003
The arrangement has at least two generators (1) driven by wind rotors that generate electrical energy for feeding into an electrical supply network. The generators have their generator phase outputs (R,S,T) connected in parallel to coupling points (KR,KS,K...
https://drivepatents.com/patents/1100022 · 4 Dec 2002
A power converter circuit for voltage maintenance in an alternating voltage supply network (1) is specified, wherein the alternating voltage supply network (1) has for each phase (R; S; T) an associated voltage source (UR; US; UT) for supplying an electric...
https://drivepatents.com/patents/1100870 · 23 Oct 2002
The gas turbine has a combustion chamber (6), a row of guide blades (3), and temperature sensors (8). These consist of spectrometers operating in optical, IR or UV range and measure combustion gas temperature, and gas temperature at a distance of 0,1 to 5 ...
https://drivepatents.com/patents/1102355 · 21 Aug 2002
Method in which at a measurement time point a set of measurement values are recorded and, from the set, a state vector is determined that characterizes the degradation of the gas turbine. To detect an incorrect value, and therefore a faulty sensor, an esti...