47results about How to "Large magnetic area" patented technology

A snap-fit ​​adjustable electromagnetic tripper belongs to the technical field of circuit breakers. It includes a current-carrying wire, a first bracket fixed on the current-carrying wire, a second bracket hinged on the first bracket, an armature fixed on the second bracket, and an armature fixed on the current-carrying wire and corresponding to the armature. The iron core, the iron core includes first and second U-shaped cores, and the first and second U-shaped cores are fixed with the current-carrying wires. Advantages: Due to the use of the first and second U-shaped cores, two independent magnetic circuits are formed by the first and second U-shaped cores and the armature, so that the first and second U-shaped cores form with the armature Four magnetically conductive air gaps δ, the magnetically conductive area S can be increased, and the number of ampere-turns passed through the first U-shaped core is large, so even when the current-carrying wire flows through a small current, a large electromagnetic attraction will be generated , so as to ensure sensitive and reliable tripping, and can expand the current regulation range from the original 200-250A in the prior art to 125-250A.

Provided is an external rotor wind driven generator, which belongs to the technical field of new energy generating, and comprises a shaft, a turbine fan blade, a first armature winding, a second armature winding, a rotor iron core, a permanent magnet, a stator iron core, and a housing. The external rotor wind driven generator is characterized in that the inner side of the rotor iron core is provided with protruding rotor teeth in the number of 6k (k is a positive integer); the stator iron core fixed to the shaft is composed of U-shaped sub-stator iron cores in the number of 5k, and the two sides of the sub-stator iron core are respectively provided with a stator tooth protruding along the radial direction; a yoke part at the middle of the sub-stator iron core is embedded with the permanent magnet magnetizing along the axial direction; the root part of the stator tooth at one side of the sub-stator iron core is winded with the concentration type first armature winding , and the root part of the stator tooth at the other side of the sub-stator iron core is winded with the concentration type second armature winding. The invention is advantageous in that the rotor structure is simple and reliable, and the positioning force and the moment of inertia is small, and response is rapid; the demagnetizing armature reaction can be weakened, and the power density excitation and coiling mode can be improved, and thereby the external rotor wind driven generator is very suitable for the wind driven generator of gentle breeze.

The invention discloses a full-winding electromagnetic stirring device for a plate billet continuous casting crystallizer and a plate billet continuous casting crystallizer. The electromagnetic stirring device comprises a columnar iron core of which the working surface is not provided with a tooth socket; the non-working surface of the columnar iron core is arranged in an inner water cooling sleeve; a plurality of coils are wound on the working surface of the columnar iron core and the inner water cooling sleeve; the coils on the inner water cooing sleeve are arranged in an outer water cooling sleeve; circulating pipes are arranged in both the inner water cooling sleeve and the outer water cooling sleeve; two ends of each circulating pipeline are respectively communicated with a water pipe connector. The space utilization of a coil winding is improved furthest, the magnetic conduction area of the columnar iron core is increased, and the magnetic field intensity is improved, so the electromagnetic force of the electromagnetic stirring device is increased by 10-20 percent, the production period is shortened by 1 / 3, and the universality is high.

The invention discloses a primary structure of a low eddy current loss cogging type cylindrical linear motor, which includes primary teeth, primary yokes and multiple circular ring groups; the primary teeth and primary yokes are separate components and are tightly fitted together , forming the primary iron core; one or more circular ring groups are embedded between each two primary tooth assemblies; the ring-shaped primary tooth assembly consists of multiple tooth core blocks of the same specification arranged in an array along the side length of an equilateral polygon Each core block is made of silicon steel sheets laminated along the circumferential direction; the primary yoke assembly is made of silicon steel sheets laminated along the motor moving direction, and each lamination is evenly opened with a number of shallow grooves in the yoke along the circumferential direction to prevent Break the eddy current path along this direction. The invention adopts the method of separating the teeth and yokes and laminating sheets in different directions to form the primary iron core, which can effectively reduce the eddy current loss of the cogged cylindrical linear motor, improve the efficiency of the motor, and at the same time maintain a high thrust density of the motor.

The invention discloses a low-rotational inertia servo motor, which belongs to the technical field of motors. The low-rotational inertia servo motor comprises a motor shell, an excitation stator ironcore, an armature stator iron core, a rotor iron core, an excitation winding, an armature winding and a shaft, and is characterized in that the disc-shaped rotor iron core is fixed on the shaft; the disc of the rotor iron core is provided with 4k uniformly-distributed fan-shaped through holes, and k is a positive integer; the two axial sides of the rotor iron core are provided with the excitationstator iron core and the armature stator iron core respectively; the excitation stator iron core is provided with 3k excitation stator poles protruding against one side of the rotor iron core, and theexcitation stator poles present a fan shape; and the armature stator iron core is provided with 3k armature stator poles protruding against one side of the rotor iron core, and the armature stator poles present a fan shape. The excitation winding and the armature winding in the technology are mutually isolated, the rotor iron core is only a disc with a large-area through hole, the rotational inertia is small, and the low-rotational inertia servo motor is facilitated.

The invention discloses a brushless hybrid excitation motor for an electric skateboard, which belongs to the technical field of electric vehicles. The brushless hybrid excitation motor for the electric skateboard is composed of a shaft, a hub, a stator iron core, armature windings, permanent magnets, a rotor iron core and a bearing, wherein the inner circumference of the hub is fixed with 4K rotorteeth, and K is a positive integer; the stator iron core is formed by 3K uniformly-distributed [-shaped sub stator iron cores, and two sides of each sub stator iron core are provided with stator teeth; all stator teeth face the outer side of the circumference, and the two stator teeth of the same sub stator iron core are arranged at two sides of the rotor tooth of the rotor iron core; the middleyoke part of each sub stator iron core is embedded with the permanent magnet; and the middle yoke part of each sub stator iron core is wound with a centralized armature winding. Centralized excitationcan be effectively realized, the magnetic path is short, and iron and copper consumption is little; the advantage of high power density of a disc motor can be thoroughly exerted, and high applicationvalue is realized in the micro electric vehicle such as the electric skateboard.

The invention relates to a fault tolerant generator at the nozzle side of an aerial engine, and belongs to the field of aircraft engineering. The fault tolerant generator comprises an excitation coil,an excitation iron core, a rotor iron core, an armature coil and an armature iron core; the rotor iron core is fixed at one side of the nozzle of the low-pressure shaft of the aerial engine; the excitation iron core and the armature iron core are separately positioned at two axial sides of the rotor iron core; 12 fan-shaped through holes are uniformly distributed on the circumference of the rotoriron core; 10 fan-shaped protruding excitation poles are at one side of the excitation iron core towards the rotor iron core; 10 fan-shaped protruding armature poles are at one side of the armature iron core towards the rotor iron core; a centralized excitation coil is wound on each excitation pole; and a centralized armature coil is wound on each armature pole. According to the fault tolerant generator disclosed by the invention, the rotational inertia of the rotor iron core is low; therefore, the rotor iron core can rotate at high speed; and thus, the rotor iron core is particularly suitable for the fault tolerant generator at the nozzle side of the aerial engine.

The invention discloses an extended-range electric vehicle gas turbine generator and belongs to the field of electric engineering. The extended-range electric vehicle gas turbine generator comprises stationary blade grids, movable blade grids, an excitation iron core, an exciting winding, a shaft, a rotor core, an armature core, an armature winding and a motor housing. The extended-range electricvehicle gas turbine generator is characterized in that fuel gas flows through the stationary blade grids and then pushes the movable blade grids and the rotor core rotate around the shaft; the excitation iron core is arranged on one side of the rotor core, and the armature core is arranged on the other side of the rotor core; a plurality of uniformly distributed fan-shaped through holes are formedin the circumference of the rotor core; a plurality of exciting poles protruding towards one side of the rotor core are uniformly distributed in the circumferential direction of the excitation iron core, and a plurality of armature poles protruding towards one side of the rotor core are uniformly distributed in the circumferential direction of the armature core. The extended-range electric vehicle gas turbine generator can fully play the advantage that the power generation efficiency of the gas turbine generator is higher than that of a power generator driven by an internal combustion engine.The rotational inertia of the rotor core is small, and the rotor core can rotate at high speed and thus is very suitable for the extended-range electric vehicle gas turbine generator.

The invention discloses a permanent magnet wind-driven motor with low rotational inertia, and belongs to the technical field of special motors. The permanent magnet wind-driven motor comprises a shaft, an armature iron core, first armature windings, second armature windings, a rotor iron core, permanent magnets, a permanent magnet iron core and a shell, and is characterized in that 4k fan-shaped through holes are uniformly formed in a disc of the rotor iron core, and the k is a positive integer; the permanent magnet iron core and the armature iron core which are fixed onto the shell are arranged on two sides of the rotor iron core, the 6k fan-shaped permanent magnets are arranged on the surface, which faces the rotor iron core, of the permanent magnet iron core, 12k fan-shaped protruded armature poles are uniformly distributed on the side, which faces the rotor iron core, of the armature iron core, each first armature winding is wound on the two corresponding armature poles, and the second armature windings are wound on the odd-number armature poles along the clockwise direction. The permanent magnet wind-driven motor has the advantages that the rotor iron core is low in rotational inertia and can quickly respond, the second windings are capable of weakening demagnetization armature reaction and increasing the power density, and accordingly the permanent magnet wind-drivenmotor is quite suitable to be used as a wind-driven power generator started by breeze.

The invention relates to a grid-shaped rotor motor for a range extender of an electric automobile and belongs to the technical field of electric automobiles. The grid-shaped rotor motor is composed of a crankshaft, a shell, a stator iron core, an exciting winding and an armature winding, wherein ten rectangular holes are uniformly formed in the circumferential surface of the shell, and a grid-shaped iron core capable of conducting magnetism is arranged between any two rectangular holes; the stator iron core fixedly arranged on a range extender shell is composed of 12 substator iron cores uniformly distributed in a left inverted 'n' shape, stator poles projecting along the radial direction are arranged at the two sides of each substator iron core, and the side surface of each stator pole is in a sectional shape; the distance between two stator poles on one substator iron core is less than the axial length of each rectangular hole in the shell; the exciting winding is formed by winding yokes of all the 12 substator iron cores. The grid-shaped rotor motor provided by the invention can fully play the advantage of high power density of a disc type motor, and the exciting winding is short in path and small in copper loss.

The invention discloses an aviation internal type permanent magnetism starting generator, which belongs to the field of electrical engineering, and comprises a permanent magnet, a permanent magnetism magnet yoke, a rotor iron core, an armature winding and an armature iron core. The aviation internal type permanent magnetism starting generator is characterized in that the rotor iron core is fixed to one side of an air inlet of the low pressure shaft of an aero-engine; the permanent magnetism magnet yoke and the armature iron core are respectively disposed at two axial sides of the rotor iron core; the circumference of the rotor iron core is uniformly provided with fan-shaped through holes in the number of 5k (k is a positive integer greater than 1); One side of the permanent magnetism magnet yoke orienting towards the rotor iron core is fixed with a fan-shaped permanent magnet; one side of the armature iron core orienting towards the rotor iron core is provided with fan-shaped protruding armature pole; the magnetizing direction of each adjacent three permanent magnets is of the same, and each armature pole is winded with a concentration type armature coil. The aviation internal type permanent magnetism starting generator is advantageous in that the temperature of the air inlet is quite low, which can adapt to the work of the permanent magnet; the moment of inertia of the rotor iron core is small, the pole number of the rotor is small, and high-speed rotation can be realized; the aviation internal type permanent magnetism starting generator can be operated both as a motor and a generator, and thereby it is very suitable for an aviation internal type starting generator.

The invention discloses a vehicle start generator and belongs to the technical field of vehicle motors and electrical appliances. The vehicle start generator is formed by a shaft, a rotor, a stator core, armature windings, permanent magnets and a bearing; 2K rectangular holes are evenly distributed in the circumferential surface of the rotor, and K is a positive integer; the stator core is formedby 3K evenly-distributed 'U'-shaped sub-stator cores, and two ends of each sub-stator core are respectively provided with a stator tooth provided with fan-shaped sides; one permanent magnet is clampedin the yoke of the center of each sub-stator core, and the root of each stator tooth is surrounded with one armature winding. The vehicle start generator has the advantages of short magnetic circuit,short enameled wire and quite low in consumption of iron and copper, the advantage that the rotor is magnetic conductive is fully developed, and high application values on the vehicle start generatorare achieved.