43results about How to "High back EMF" patented technology

The invention relates to a centrally-distributed coreless winding, which comprises layer-staggered conductors, normal conductors and winding taps. The layer-staggered conductors are disposed in the middle position of the winding in a centralized manner, the normal conductors are distributed on two sides of the layer-staggered conductors, the winding taps are located on two end portions of the normal conductors, and the wire density of the middle part of the winding is higher than that of the normal conductors. Compared with the prior art, the centrally-distributed coreless winding effectively improves the counter potential of a coreless motor, and further enhances performance of the motor.

The invention discloses a magnetic-field-enhanced permanent-magnetic switching flux linkage motor with high fault tolerance. The motor comprises a rotor, a stator, three-phase armature windings and a casing, wherein the casing is made of magnetic conductive material; the rotor consists of toothspace-type core laminations; the stator fixed in the casing comprises first permanent magnets, a first U-shaped iron core, reluctance sheets and a second U-shaped iron core arranged one by one; N poles and S poles of the first permanent magnets are alternately arranged; armature teeth consist of the first permanent magnets and U-shaped iron core edges clinging to two sides of the first permanent magnets respectively; auxiliary teeth consist of the reluctance sheets and the U-shaped iron core edges clinging to two sides of the reluctance sheets respectively; the three-phase armature concentrated windings are wound round the armature teeth; second permanent magnets are arranged between the casing and the stator; and the first permanent magnets and the second permanent magnets in contact with the U-shaped iron cores have the same polarity on contact surface. The motor is simple in structure. Compared with the prior permanent-magnetic switching flux linkage motor, the motor has the advantages of improving anti-electromagnetic interference capability and electromagnetic compatibility and raising the rate of utilizing the permanent magnets, along with higher output power density and capability of avoiding magnetic leakage on the outer edge of the casing.

The present invention proposes a variable winding starter generator, which includes rotor core, stator core, coil, shaft and casing, etc., and is characterized in that each stator pole has a centralized coil with one m-turn and one n-turn; when the When the variable-winding starter-generator used for automobiles is used as a starter, the switch connects all the coils on the stator poles with the same phase in series to form a phase armature winding, and each phase armature winding is connected to an asymmetrical half-bridge with a body diode After the converter, it can run electrically in the switched reluctance motor mode; when the automobile variable winding starter generator is used as a generator, the n-turn coils on all stator poles are connected in series to form an excitation winding, and the stator poles with the same phase The m-turn coils on the upper part are connected in series or in parallel to form a phase armature winding, and the starter generator operates in the mode of electric excitation double salient pole generator to generate electricity. The starter generator of the invention can effectively utilize the advantage of relatively high efficiency of the switched reluctance motor, and also effectively utilize the advantages of simple voltage regulation and control of the electrically excited double salient pole generator.

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 belongs to the technical field related to motors, and discloses a double-stator tangential excitation magnetic field modulation motor, the motor includes an outer stator, an inner stator and a rotor, and the outer stator, the inner stator and the rotor are coaxial , the rotor is located between the outer stator and the inner stator; the inner stator includes a cylindrical inner stator core, and a plurality of permanent magnet units are embedded on the inner stator core, each permanent magnet The unit includes six permanent magnets arranged at intervals along the circumference of the inner stator core, the permanent magnets at the second and fifth positions have the same width, and the permanent magnets at the first, third, fourth and sixth positions The widths of the permanent magnets are equal, and the width of the permanent magnets located in the second position is not equal to the width of the permanent magnets located in the first position. The invention improves back electromotive force, torque density, power factor and efficiency.

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 magnetic gathering type stator permanent magnetic type vernier motor. A rotor is located on the outer portion of a stator and an air gap is arranged between the rotor and the stator. A plurality of stator teeth and a plurality of stator grooves are arranged at one end of the stator and the end of the stator is close to the air gap. Virtual teeth and virtual grooves are arranged at a tooth end of each stator tooth, the virtual teeth are arranged at two ends of the tooth end of the stator tooth along the circumference direction, and the number of the virtual teeth is one more than the number of the virtual groove. A permanent magnet unit which is composed of a radial magnetizing permanent magnet and two tangential magnetizing permanent magnets is embedded in each virtual groove, both two sides of the radial magnetizing permanent magnet are tightly pasted with tangential magnetizing permanent magnets, the magnetizing directions of the two tangential magnetizing permanent magnets which are arranged in the virtual groove are opposite to each other, and magnetism of each radial magnetizing permanent magnet is consistent. Due to the adoption of the virtual teeth, use level of the permanent magnets is reduced and cost is reduced. Due to the fact that permanent magnets matches with each other, leakage magnetic flux of teeth portions is effectively reduced and output torque and power density are improved.

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 discloses a double-armature-winding double-salient-pole motor power generation system. Two armature windings are arranged on each stator tooth of a double-salient-pole motor, the armature windings on the corresponding stator tooth are connected mutually in series to form a phase armature winding, the positive ends of one phase armature windings in the two phase armature windings formed by the two armature windings of the corresponding teeth are connected together, are led out through lead wires and serve as the negative electrodes of a double-salient-pole power generation system, and the negative ends of the one phase armature windings in the two phase armature windings formed by the two armature windings of the corresponding teeth are connected with anodes of rectifier tubes. The negative ends of the other phase armature windings are connected together, are lead out through lead wires, and serve as the negative electrodes of the double-salient-pole power generation system, the positive ends of the other phase armature windings are connected with the anodes of the rectifier tubes, cathodes of the rectifier tubes are connected to one point, are led out through lead wires and serve as the positive electrode of the double-salient-pole power generation system to be connected into a load, and thus the novel double-salient-pole motor power generation system is formed. The double-armature-winding double-salient-pole motor power generation system increases the power density of the double-salient-pole motor, and improves the fault-tolerant capability of the system.