40results about How to "Improve excitation performance" patented technology

The invention aims to provide a novel coil rack for an electromagnetic switch. The coil rack comprises a first baffle plate, a second baffle plate, a coil drum and two half-moon-shaped baffle plates. The coil winding mode in the prior art can be changed by utilizing the coil rack, and the excitation capability of coils can be improved.

A small-power three-phase AC switched reluctance power generator / motor converter comprises three phase winding conversion branches, a reversible bridge-type conversion circuit and an electrolytic capacitor, wherein each three phase winding conversion branch is connected in parallel and then is rectified to output by the reversible bridge-type conversion circuit, the output is used as a resonant capacitor in the phase winding conversion branch during operation of a power generator to provide excitation, the output also can be inversed by the reversible bridge-type conversion circuit for supplying power to each phase winding to run a motor, and alternating current can be given out or utilized to work. The whole converter system runs in a plurality of quadrants, is high in controllability and flexibility and is suitably used a small-size switched reluctance machine integrated utilization system under the condition of no power grid.

The invention relates to the technical field of motors, in particular to a disc stepping motor, thus the problems of unreasonable structure, low intensity and the like in the prior art are solved. The motor comprises a disc motor shell which is formed by fastening and fixing a front end cover and a rear end cover; a motor shaft is arranged in the motor shell in a penetrating mode and is fixedly provided with a multipolar magnetizing circular disc which is positioned in the motor shell; windings adjacent to the circular disc are fixed in the motor shell; and iron cores are respectively fixed at two sides of the circular disc. The disc stepping motor has the advantages that the whole circular disc is in an integral structure, which can effectively improve the excitation performance of rotors and simplify the whole structure; the mechanical strength is high, a loose structure does not occur due to long service and the suffered impact; the structure is convenient to process and lower in manufacturing cost; the winding structure is simple and is easy to process; and in addition, because a position sensor is configured to inspect positions of the rotors, semi-closed loop control is realized.

The invention discloses a bistable permanent-magnet operating mechanism dispersedly exciting on two sides of brake opening and closing working air gaps, which is suitable to be used for driving a contact terminal to move in single-phase, multi-phase high-voltage, intermediate-voltage and low-voltage switches and is characterized in that a main brake closing coil and an auxiliary brake opening coil are arranged on one side of a brake closing working air gap, and a main brake opening coil and an auxiliary brake closing coil are arranged on one side of a brake opening working air gap, wherein the main brake closing coil and the auxiliary brake closing coil are connected in series; and the main brake opening coil and the auxiliary brake opening coil are connected in series. The invention has favorable excitation effect; a moving iron core can obtain enough operation power in a whole movement process; the contact time and the movement time are reduced, the peak current of an exciting coil is reduced, the energy consumption of an energy storage capacitor is decreased, and the mechanical properties are well matched with brake opening properties and brake closing properties of the contactterminal.

The invention relates to a direct-boosting doubly-fed switched reluctance generator current transformation system, which is composed of a storage battery, ten switch tubes, a three-phase winding, ninediodes, eight capacitors and two inductors, and is characterized in that the total output voltage is boosted directly under the condition of parallel connection of each phase output while the excitation and power generation of each phase winding, the problems of strengthened excitation and simultaneous work of two phase windings are solved at the same time, the switch tubes are not additionally increased, and the separated excitation storage battery can be automatically charged. Meanwhile, an automatic charging current transformation loop is utilized and can carry out backward feedback energyfeed after only fine adjustment, so that the cost performance and the adaptability are greatly improved, and the whole system is low in switching loss and high in output electric energy. The direct-boosting doubly-fed switched reluctance generator current transformation system is applicable to the field of low-power high-speed switched reluctance generator systems with various power inputs.

A double-excitation double-feed mutual-charging high-speed switched reluctance generator converter system is composed of two storage batteries, fourteen switch tubes, fourteen diodes, a three-phase winding, ten capacitors and two inductors. A phase winding converter loop divides each phase winding into two parts for respective excitation, so that the reliability is enhanced, the excitation effectis enhanced, and the output power generation voltage is directly far higher than the voltage of an input side storage battery by utilizing the same phase winding converter loop, i.e., the voltage is directly boosted; due to the arrangement of the double storage batteries, the problem that an excitation power supply cannot be selected under the excitation of the storage batteries is solved, meanwhile, a series of problems of automatic charging, reverse energy feedback, automatic charging between the double storage batteries and the like of the storage batteries are intensively solved through aset of converter circuit and regulation and control of the converter circuit, and the adaptability and flexibility of the system are improved; an isolation link of the whole system structure is also omitted; the converter system is suitable for being applied to the field of small and medium-power high-speed switched reluctance generator systems with output in connection with independent loads or grid connection under driving of various kinds of power.

The invention discloses a switched reluctance generator converter and a control method thereof. The converter is composed of a converter main circuit and a self-excitation variable-excitation circuit,and totally comprises a three-phase winding, seven switching tubes, eleven diodes, eight capacitors, an inductor and one resistor; branch windings of each phase winding of the converter main circuitare connected in parallel during excitation of each phase winding, and are automatically connected in series during power generation; an output voltage is increased; the negative electrodes of the converter main circuit and the self-excitation variable-excitation circuit are in a common ground state; input and output currents of the self-excitation variable-excitation circuit are not interrupted during operation, and an output excitation voltage of the self-excitation variable-excitation circuit can be adjusted through a duty ratio of the seventh switching tube; other switching tubes except the seventh switching tube are all in a single pulse wave switching mode; and therefore, the whole converter can be strengthened and diversified in excitation, and is high in input and output electric energy quality, high in output voltage, low in switching loss, simple and convenient to control and suitable for the fields of various switched reluctance generator systems, especially high-speed low-power switched reluctance generator systems.

The switched reluctance generator converter system with direct step-up transformer, voltage change and excitation without isolation is composed of nine diodes, nine switch tubes, three-phase windings, four capacitors, and three inductors. The excitation and power generation of each phase winding At the same time, the power generation voltage value is naturally increased, and the continuously changing power generation voltage can be further obtained through the fifth switching tube (the first phase winding, the other corresponding), and the ninth switching tube, the only switching tube, can be obtained without the isolation link. The excitation voltage can be continuously changed, and directly participates in the output of power generation. At the same time, the battery is discarded, and the excitation design is strengthened. It has an impact, and the controllability is further enhanced. With simple structure and control, the flexibility and adaptability of the system are greatly improved; it is suitable for various low-power compact high-speed switched reluctance generator system applications.

The invention relates to a high-speed direct current switch reluctance generator converter system. The system comprises four-phase windings, six switch tubes, seven diodes, five capacitors, an inductor and an isolation converter. Converter loops of the first phase winding and the second phase winding have simple structures and the same control modes, and a third phase winding and a fourth phase winding are asymmetrically integrated conversion structures. By depending on the relatively complex converter loops and the regulation and control of the fourth phase winding, the measure of enhancementof the power generation capacity of the fourth phase winding itself can be achieve such as a follow current stage, and the fourth phase winding can be mutually promoted with the third phase winding to indirectly improve the power generation capacity of the first phase winding and the second phase winding; and besides, the structure is high in expandability, the output end is connected in series to increase the voltage, the total excitation source of each phase winding is regulated according to the duty ratio of a sixth switch tube so that the high-speed direct current switch reluctance generator converter system is a set of high-performance conversion system, is especially suitable for the high-speed direct current switch reluctance generator application field, and can be taken as one ofthe generator in the internal direct current microgrid in a full-electric aircraft.

Disclosed is a high-voltage current conversion system of a switch reluctance wind power generator. A switch reluctance generator is used as a main wind power generator, and the output electric energyof a permanent magnet direct current generator coaxially connected with the switch reluctance generator is used as exciting electric energy of the switch reluctance generator; each phase of winding ofthe switch reluctance generator comprises two branches which are connected in parallel in excitation while in series in power generation, thereby strengthening the excitation effect; in power generation, the direct current power supply needed by excitation and a charged capacitor in excitation are both connected with the corresponding phase winding to be participated in power generation output, thereby highly improving the output voltage; and the whole current conversion system is high in expandability, high in reliability, simple in structure, easy to control, low in loss and suitable for medium-low-power wind power and medium-high-voltage direct current grid connection or direct current load power utilization fields.

A two-phase electric excitation doubly salient pole electric sunroof driving motor is characterized in that it consists of a stator core (1), a mover (2), an excitation isolation block (3), an excitation winding (4), a guide rail (7) and an armature winding composition; the stator core (1) has a row of stator poles protruding in the direction of the y-axis; the elongated mover is located above the stator core (1), and the mover (2) has a row of protruding poles in the direction of the negative y-axis There is a field winding (4) between every two stator poles, the field winding (4) is wound around the x-axis direction where the length of the stator core (1) is located, and the adjacent field winding (4) is wound In the opposite direction; the armature winding is wound around the stator pole, and the A-phase armature winding and the B-phase armature winding are arranged at intervals; the mover (2) is connected to the sunroof, and the stator core (1) is connected to the vehicle body, when the mover ( 2) The sunroof can be opened or closed while moving. The technology of the present application does not have a worm gear reduction mechanism, and is light in weight, thin in thickness and high in transmission efficiency.

The invention discloses a superconductive controllable reactor, which comprises a first segmented magnetic yoke, a second segmented magnetic yoke, a working coil, a superconductive excitation coil group and a low-temperature dewar, wherein the first segmented magnetic yoke is an iron core; the second segmented magnetic yoke comprises an excitation iron core group and two same cambered iron cores; the excitation iron core group consists of a plurality of excitation iron cores which are distributed and clamped in the two cambered iron cores of the second segmented magnetic yoke at equal radians; each excitation iron core is sleeved on each superconductive excitation coil; the inductance values of the superconductive excitation coils are the same, and the superconductive excitation coil group is formed by connecting the superconductive excitation coils in series; the two adjacent superconductive excitation coils are sequentially connected with one another according to homonymy terminals and synonym terminals; the number of the superconductive excitation coils and the number of the excitation iron cores are the same and even; and the superconductive excitation coils and the excitation iron cores are arranged in the non-magnetic low-temperature dewar. The superconductive controllable reactor can continuously and adjustably compensate the reactive power of a power grid in a large scale, so that reactive power balance is realized, the stability of a power transmission system is improved, the power transmission capacity is improved, and system overvoltage is suppressed.

A direct-boost self-varying excitation switched reluctance generator converter system, consisting of nine switch tubes, three-phase windings, seven capacitors, twelve diodes, two transformers, and two inductors, using the least number of switch tubes , which solves the problem of achieving different high voltage outputs under certain conditions while the windings of each phase of the switched reluctance generator are excited and generating power. The current is cut off automatically at the end of the power generation, with high efficiency and high device utilization. Under the variable excitation voltage structure, the excitation voltage can be continuously adjusted and the output of different excitation voltage ranges can be realized under certain conditions. The second transformer plays a comprehensive role of isolation, voltage transformation, and protection of the stability of the excitation power. The current at the input end of the variable excitation circuit is continuous. , less interference to the output end of the power generation, taking into account the enhanced excitation function, the whole system has high utilization rate, high reliability, low loss, low cost, and strong flexibility and adaptability: it is suitable for high-speed switched reluctance generator systems driven by various powers field application.