About 60 results
https://drivepatents.com/patents/1097900 · 5 Mar 2003
An electrical energy regulation system evaluates electrical parameters (u1) in the conductor and uses a function processor to apply a control function, derived from the evaluated values and a mathematical function, to adjust the electrical state of the sys...
https://drivepatents.com/patents/1098686 · 29 Jan 2003
Process for regulating the methanol concentration of a direct methanol fuel cell system having a fuel cell and a separate methanol reservoir comprises varying a first system parameter; and introducing methanol from a methanol reservoir depending on the res...
https://drivepatents.com/patents/1098848 · 22 Jan 2003
In an apparatus and a method for isolating a first section (1) of an electrical grid from a second section (2) of the electrical grid, an islanding detection means (11) determines whether the first grid section (1) is switched off, and a disconnecting devi...
https://drivepatents.com/patents/1099778 · 11 Dec 2002
The method involves describing all possible configurations using a configuration model, determining a number of requirements for a configuration to be determined, systematically generating all possible configurations that satisfy these requirements, each h...
https://drivepatents.com/patents/1100144 · 27 Nov 2002
A method, device and computer program product for the prediction of the stability of an electric power network, where the method is executed after a fault or contingency has occurred, and comprises the steps of a) during a time interval in which the networ...
https://drivepatents.com/patents/1101015 · 16 Oct 2002
The method involves driving an inverter (4) with control signals formed from a reference feed voltage (Uein, ref) to produces a feed voltage for one of the phases (R,S,T) of an a.c. network. The sum of the feed voltage and a network voltage (UN) correspond...
https://drivepatents.com/patents/1101479 · 25 Sep 2002
The device has loads connected to an a.c. sub-network connected to a supply via a switch and a primary winding of a coupling transformer. The a.c. side of a first current converter is connected between the switch and primary winding. The a.c. side of a sec...
https://drivepatents.com/patents/1102346 · 21 Aug 2002
The cooling and pre-warming device has a common cooling medium reservoir (43) coupled to each of the electrochemical converters (3,5), for using the heat removed from the cooled electrochemical converter for pre-heating the other electrochemical converter....
https://drivepatents.com/patents/1105060 · 24 Apr 2002
A private generating system supplies a load (8.9) and is backed up by a public or other private network (10). Normally to meet the set turbine (1) output the inverter (14) output current is controlled by maintaining the link circuit (4) dc voltage at a set...
https://drivepatents.com/patents/1108290 · 28 Nov 2001
A control device (6) and method serve to specify a real setpoint value (8) to a control system (3). They comprise a manually operable control lever (1) and a measuring unit (2) for determining the real setpoint value (8) in accordance with a real control p...