Abstract: A system for providing electrical power to a facility includes a generator configured to generate electrical power for the facility when a drive-shaft of the generator is rotated. A motor is configured to provide torque to rotate the generator drive-shaft and to be driven by a first power supply. A mechanical energy provider is configured to provide torque to the drive-shaft using mechanical energy generated from an intermittent local power source. The system is configured to defer to the mechanical energy provider to rotate the drive-shaft such that, when the intermittent local power source is active, less power is needed from the first power supply to power the motor than when the intermittent local power source is inactive.

Abstract: An apparatus for use in an electrical power generation plant. The apparatus includes: at least two adjustable speed drives, each connected, on an alternating current side, to an associated auxiliary motor; at least one reactive power consuming auxiliary device connected to an alternating current bus; a controller; a converter for converting alternating current to direct current or vice versa between the alternating current bus and a direct current bus; and at least one electrical power source arranged to provide power to the direct current bus. Each of the at least two adjustable speed drive is connected, on a direct current side, to the direct current bus.

Abstract: A separately excited synchronous machine (1b1k) with an excitation circuit on the side of the rotor includes an excitation winding (3) and a power supply for the excitation winding (3) as well as a switching element (8a, 8e) for connecting the power supply to the excitation winding (3). Further, the synchronous machine (1b1k) comprises a first stator-side primary winding (5a5f) and a first rotor-side secondary winding (6a6f). Moreover, the synchronous machine (1b1k) may comprise a) a tap of the first rotor-side secondary winding (6d) connected to a control element (9a, 9e) of the switching element (8a, 8e) or b) a second rotor-side secondary winding (14d), which is coupled to the first stator-side primary winding (5a5f) and connected to a control element (9a, 9e) of the switching element (8a, 8e).

Abstract: A motor driving system including command value output means configured to output an analog value according to a rotation speed command; a first power line having first switching means; a drive circuit, to which power is supplied via the first switching means and the first power line, driving a motor supplying rotation based on the analog value; and switching control means configured to make the first switching means nonconductive when the analog value is smaller than a first predetermined value, and independent of the command value output means.

Abstract: Method and apparatus for controlling an apparatus transmitting power between two electricity networks or between an electricity network and a polyphase electric machine), and including low-voltage power cells (C), which include a single-phase input/output connection (IN/OUT). The power cells are arranged into groups (G1-GN, GP1-GPN1, GS1-GSN2, G1??-GN??) such that at least one power cell per each phase of the electricity network or of the electric machine belongs to each group, and the input terminals (IN) of all the power cells belonging to the same group are connected to a common transformer, the transformer including its own separate winding that is galvanically isolated. The controllable power semiconductor switches connected to the input connectors (IN) of all the power cells supplying power to the same transformer are controlled cophasally with a 50% pulse ratio.

Abstract: In order to improve reliability, cost performance, and cooling property, a control device integrated dynamo-electric machine mounted to a dynamo-electric machine includes an inverter bridge configured with a plurality of semiconductor switching elements, and a plurality of heat sinks provided for respective arms of the inverter bridge and having the semiconductor switching elements of the corresponding arms mounted thereon for cooling the mounted semiconductor switching elements, wherein the semiconductor switching element includes a plurality of semiconductor switching devices arranged in parallel, and the plurality of semiconductor switching devices arranged in parallel are mounted on the common heat sinks.

Abstract: A method for operating a matrix converter in which m phases of a generator generating alternating voltage with n (n<m) phases of a load are alternatingly connected via a multiple number of controllable bi-directional switches arranged in an (m×n) matrix, wherein switching over from a selected connected phase of the generator to a selected non-connected phase of the generator takes place in a controlled sequence of commutation instants of the individual switches.

Abstract: A rotating asynchronous converter and a generator device having a first stator connected to a first AC network with a first frequency f1, and a second stator connected to a second AC network with a second frequency f2. The converter has a rotor which rotates in dependence of the first and second frequencies f1, f2. The stators each have at least one winding formed of at least one current-carrying conductor, and an insulation system, formed of semiconducting layers each forming an equipotential surface, and a solid insulation between the semiconducting layers.

Abstract: The present invention relates to a rotating asynchronous converter and a generator device. The converter comprises a first stator connected to a first AC network with a first frequency f1, and a second stator connected to a second AC network with a second frequency f2. The converter also comprises a rotor means which rotates in dependence of the first and second frequencies f1, f2. The stators each comprises at least one winding, wherein each winding comprises at least one current-carrying conductor, and each winding comprises an insulation system, which comprises on the one hand at least two semiconducting layers, wherein each layer constitutes substantially an equipotential surface, and on the other hand between them is arranged a solid insulation.

Abstract: A rotating asynchronous converter for connection of AC network with equal or different frequencies employs a first stator connected to a first AC network with a first frequency and a second stator connected to a second AC network with a second frequency, and a rotor which rotates in response to the first and second frequencies. The converter has at least one winding formed of a cable, including a conductor and a magnetically permeable, electric field confining insulating covering surrounding the conductor.

Abstract: The present invention relates to a rotating asynchronous converter and a generator device. The converter comprises a first stator connected to a first AC network with a first frequency f1, and a second stator connected to a second AC network with a second frequency f2. The converter also comprises a rotor means which rotates in dependence of the first and second frequencies f1, f2. The stators each comprises at least one winding, wherein each winding comprises at least one current-carrying conductor, and each winding comprises an insulation system, which comprises on the one hand at least two semiconducting layers, wherein each layer constitutes substantially an equipotential surface, and on the other hand between them is arranged a solid insulation.

Abstract: An interconnection system (100) for transferring power between a first grid (22) operating at a first electrical frequency and a second grid (24) operating at a second electrical frequency includes a rotary transformer (102) and a power recovery system (103). The power recovery system (103) recovers and applies to the transferee grid a power differential attributable to mechanical power channeled to a rotatable shaft (113) of the rotary transformer (102).

Abstract: Acoustic transmitter in particular for use in offshore seismic explorations, having sound-emitting surfaces (1, 2) being adapted to be subjected to vibrational movement by means of a drive unit (21) through at least one push element (22A, 22B) and two plate-like end pieces (3, 4) which are connected to the sound-emitting surfaces. The sound-emitting surfaces are formed by two curved plate members (1, 2) being of comparable width and heigth dimensions. The end pieces (3, 4) have a generally rectangular shape with a first pair of opposing side edges connected (5, 6, 7, 8) to end portions of the plate members (1, 2). Another pair of side edges on each end piece (3, 4) as well as side edges of the plate members engage two side plates (9, 10) which at either side closes the acoustic transmitter, preferably in a tightly enclosing manner.

Abstract: The generator set comprises an internal combustion engine (5) driving a three-phase generator (6). The latter is surmounted by a casing (7) containing a converter (8) which is supplied with power by the generator (6) and provides a current of 42 V at 200 Hz at the socket (11).

Abstract: A static magnetic frequency multiplier has iron structures which form a closed magnetic circuit and which carry a polyphase primary winding having p.sub.1 pole pairs distributed in slots. The winding legs, pitch, interleaving of circuits, setting of the slots, and the like, of the primary winding are so constructed that a voltage is induced at its terminals only by the fundamental of a field which has the pole pair number p.sub.1. In addition, the iron structures carry a secondary winding with the pole pair number p.sub.2 which is an uneven multiple of p.sub.1 and which is distributed in slots, being magnetically coupled to the primary winding. The secondary winding is designed so that no voltage is induced at its terminals by the fundamental of a field having the pole pair number p.sub.1.

Abstract: In stationary magnetic frequency multipliers which comprise a polyphase primary winding distributed in slots and a secondary winding magnetically coupled to the former, a travelling field can be produced if the primary and secondary windings, designed as ring windings, are arranged in two opposite rows of slots of an iron member with which a return member is so closely associated as to rest isolated against the tooth ends of the latter. In order that at least the primary winding neet not extend over at least two full pole pitches, laminated connecting parts are provided outside of the wound zone of the respective slotted iron member. These connecting parts establish a magnetic connection between the slotted iron member and the return member and are designed so that they remain unsaturated in any operating state.

Abstract: Disclosed is a frequency converter system for altering the frequency of a-c power supplied from a distribution network to a load, the system including a pair of mechanically coupled rotating alternating current machines, the alteration of the rate and direction of rotation of the prime mover altering the frequency of the power. A variable impedance network comprising saturable core reactors and connected in the rotor circuit of the prime mover is utilized to effect the change of rate and direction of prime mover rotation.

Abstract: A non-interruptible power system (NIPS) for generating polyphase A.C. of a substantially constant desired frequency and a substantially constant selected voltage, comprising:(A) a source of interruptible power and a motor energized thereby,(B) a novel generator for producing the desired polyphase A.C.

Abstract: An inductor-type high frequency generator with alternating current field excitation and frequency changing output means. An excitation winding provides current for the field winding by way of a rectifier, and automatic voltage regulator and an inverter. In response to generator output the A.V.R. controls the d.c. voltage fed to the inverter.

Abstract: A constant frequency a.c. generating system includes an alternator driven at a variable speed. A rectifier provides a d.c. supply for a rotary inverter. To maintain the voltage and frequency of the inverter output constant, the frequency is monitored and used to control the alternator field current and the voltage is monitored and used to control the inverter field current in a regulator circuit.