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 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 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.