摘要:
There is provided a generator system for internal combustion engines, which can produce power efficiently at all times irrespective of the engine speed even for use in an internal combustion engine operated at variable speeds such as a vehicle engine. An ACG.ECU 3 determines a rotation speed N2 of a rotating electromagnetic field to be generated by a rotor 1R based on a mechanical rotation speed N1 of the rotor 1R in an alternator 1 such that the relative speed N of the rotating magnetic field to a stator 1S agrees with the maximum efficiency speed of rotation Nx. Then the ACG.ECU 3 sends the determined value to a rotating electromagnetic field controller 2a. The rotating electromagnetic field controller 2a controls phases of AC power to be supplied to a three-phase coil 11 of the rotor 1R to generate a rotating electromagnetic field with the rotation speed N2.
摘要:
A variable velocity generator-motor apparatus includes a wound rotor induction generator-motor having a primary winding connected to a power system, a secondary winding excited by an alternating current (AC) and a generator shaft; a prime-mover/load united with the generator shaft; a frequency detection element for detecting an AC excitation frequency on the basis of power data including a frequency and a voltage phase in the power system and data of the generator shaft; an element for generating a slip frequency command value in the generator-motor; and a frequency control element for controlling the generator-motor in the manner that the AC excitation frequency is set to the slip frequency command value.
摘要:
Abgasturbinen-Generatoranlage für Dieselmotoren, insbesondere für Schiffsdieselmotoren mit oder ohne Wellengenerator sowie für kombinierten Wellengenerator-Motor und Generatorbetrieb mit oder ohne frequenzentkoppelte Umrichter. Ein überschüssiger Teil der Dieselmotorabgase wird einer Nutzturbine zugeführt. Zur Optimierung der Energieeinsparung wird ein fremderregter, von der Nutzturbine über ein Untersetzungsgetriebe angetriebener Synchrongenerator (Turbogenerator) verwendet, der über einen Netzschalter die Energie in ein Netz oder auf einen Synchronwellengenerator des Dieselmotors einspeist. Ein über einen Antiduktor ansteuerbarer Widerstand zur Belastung des Turbogenerators bei Lastausfall des Netzes ist so dimensioniert, daß er kleiner als die Nennreaktanz des Turbogenerators ist. Vor dem Anfahren der Turbine und Öffnen der Abgasklappe wird der Generator erregt, der Antiduktor gezündet und der Netzschalter geöffnet. Nach dem Öffnen der Abgasklappe wird mit einer Frequenzregelung und Stellung des Belastungsstroms im Belastungswiderstand durch den Antiduktor die Frequenz des Turbogenerators an die des Inselnetzes oder eines Wellengenerators herangefahren und über den Netzschalter (S1) zusynchronisiert.
摘要:
In a compound electromechanical assembly a first singly fed stage is mounted for common rotation with a second singly fed stage mounted for common rotation with a second singly fed stage impedance inserted between the secondaries, interconnected in inverted connection to form an electrical loop. The impedance includes a resistor (R20) and a capacitor (C20) connected in parallel.
摘要:
An induction system of the invention is adapted to apply coordinate transformation to the excitation current reference vector corresponding to the primary interlinkage magnetic flux vector reference value and the primary current vector so that they exist in the same coordinate system, thereafter to control the secondary current vector so that the primary interlinkage magnetic flux vector is in correspondence with the primary interlinkage magnetic flux vector, thereby allowing the primary side of the wound-rotor induction machine to function apparently as a voltage source.
摘要:
A control system is used for a variable speed water-wheel generator apparatus. The generator apparatus includes a generator (1) having a primary winding (1a) connected to an electric power system (4) and a secondary winding (1b) connected to the electric power system (4) through a frequency converter (3), and a water wheel (2) directly coupled to a shaft of the generator and having variable opening vanes. In the control system, a first function generator (5) is responsive to at least an output command signal (Po) for the generator apparatus to determine a rotation number command signal (Na). A speed adjuster (10, 11) produces an output signal in accordance with a signal indicative of a difference between the output signal of the first function generator and an actual rotation number. An adder (13) adds the output command signal for the generator apparatus to the output signal of the speed adjuster to determine an overall output command signal (Po'). An output adjuster (15, 17) produces an output signal in accordance with a signal indicative of a difference between the output signal of the adder and actual power of the generator whereby firing angles of the frequency converter are controlled by the output signal of the output adjuster. A second function generator (5) is responsive to the output command signal (Po) for the generator apparatus to determine an opening command signal (Ya) for the variable opening vanes of the water wheel. An opening adjuster (8) produces an output signal in accordance with a signal indicative of a difference between the output signal of the second function generator and an actual opening of the variable opening vanes of the water wheel whereby the variable opening vanes of the water wheel are controlled by the output signal of the opening adjuster. The first and second function generators increase command values for the rotation number and the variable opening vanes, respectively, as the output command signal increases. The frequency converter is controlled such that the rotation number tending to go beyond a predetermined operation range is confined within the predetermined operation range.