54results about How to "Reduce end length" patented technology

The invention discloses a mixed permanent magnetic pole-alternating and magnetic flux-switching memory motor and a winding switching magnetism-weakening control method thereof. The mixed permanent magnetic pole-alternating and magnetic flux-switching memory motor comprises a salient rotor and a stator, wherein the stator contains stator cores, aluminium-nickel-cobalt permanent magnets, neodymium-iron-boron permanent magnets, centralized armature windings and pulsed magnetism-adjusting windings; iron core edges of two adjacent outer U-shaped units and tangentially-magnetized long-stripped neodymium-iron-boron permanent magnets form a first permanent magnetic pole, while the circumferentially-inward (outward) and parallel-magnetized V-shaped embedded aluminium-nickel-cobalt permanent magnets and inner U-shaped units form a second permanent magnetic pole; mixed magnetic poles are in alternating polarity distribution; when the motor runs at a low speed, the pulsed magnetism-adjusting windings are in direct-current pulsed working state, while in a high-speed weak-magnetism area, the pulsed magnetism-adjusting windings are converted into alternating-current armature windings. Requirements on performance in a low-speed area and in the high-speed area can be met at the same time; influence of an armature reaction field on the aluminium-nickel-cobalt permanent magnets with low coercivity is small; the utilization rate of permanent magnetism, the torque density, and the reliability of system operation are high.

The invention discloses an axial magnetic field magnetic flux switching type surface-mounted permanent magnet memory motor. The permanent magnet memory motor comprises a first rotor (41), a second rotor (42), a stator (1) and an installing shaft, wherein the stator (1) is arranged between the first rotor (41) and the second rotor (42) and of an axial two-side symmetrical structure, the installing shaft is used for coaxially installing the stator (1), the first rotor (41) and the second rotor (42), and the stator is located between the two rotors to form an axial two-air-gap motor. The stator (1) is of the two-side symmetrical salient pole structure and comprises a stator iron core (2), a plurality of permanent magnets (3), a three-phase armature winding (5) and a single-phase pulse winding (6). The stator iron core (2) comprises a stator yoke (2.1) and stator teeth (2.2), wherein the stator teeth (2.2) protrude in the center direction of the first rotor (41) and in the center direction of the second rotor (42) respectively from the stator yoke (2.1). By the adoption of the permanent magnet memory motor, power density of the motor is improved, and the wide rotating speed operation range is possessed.

The invention discloses a magnetic flux switching type permanent magnet memory motor comprising an enclosure, a stator contained in the enclosure, a rotor (2) and a non-magnetic rotary shaft (8). The magnetic flux switching type permanent magnet memory motor is characterized in that the stator (1) is arranged at the outer part of the rotor (2); the rotor (2) is fixedly arranged on the non-magnetic rotary shaft (8) and is in a convex pole type; the rotor (2) comprises a rotor main body part and rotor teeth which protrude from the main body part to a direction which is far away from the center of the rotor; the stator comprises a stator iron core (1), a permanent magnet (3), a three-phase armature winding (4) and a pulse winding (5); the stator iron core (1) comprises a plurality of stator yokes and stator teeth (1.1) which protrude from the stator yokes to the direction of the center of the stator iron core; and the three-phase armature winding (4) is wound on the stator teeth (1.1). According to the magnetic flux switching type permanent magnet memory motor disclosed by the invention, a motor no-load gap magnetic field is adjustable, and the weak magnetism capability and the rotary speed operation speed of the motor are improved; and meanwhile, the torque and the power density of the motor are improved and the copper consumption of the motor is reduced.

The invention discloses a magnetism-gathering-type magnetic flux switching permanent magnet memory motor, which comprises a stator, a rotor (2) and an un-conducted magnetic shaft (8), wherein the stator (1) is arranged outside the rotor (2); the rotor (2) is fixed on the un-conducted magnetic shaft (8) and is in a salient pole type; the stator comprises a stator core (1), a first permanent magnet (3a), a second permanent magnet (3b), a three-phase armature winding (6), a first pulsed winding (4a) and a second pulse winding (4b); the stator core (1) comprises a plurality of stator yokes and stator teeth protruding to the center direction of the stator core from the stator yokes; and a stator slot is formed between the adjacent stator teeth. With the adoption of the magnetism-gathering-type magnetic flux switching permanent magnet memory motor, the residual magnetization of the permanent magnet is adjusted through applying pulse current to a pulse winding; a motor no-load air-gap field can be adjusted; the weak magnetic ability of the motor and the rotating speed operation range are improved; and meanwhile, the torque and power density of the motor can be effectively improved through magnetism-gathering-type armature teeth, and the copper loss of the motor is reduced.

The invention provides a combined permanent magnet brushless motor stator and a manufacturing method thereof. A stator core is formed by a tooth part iron core formed by winding and a yoke part iron core, the tooth part iron core is located inside, the yoke part iron core is located outside, an inner circular surface of the tooth part iron core has no notch, a winding is placed into a groove froman outer circular surface or is wounded tooth by tooth, a tooth part winding is sleeved in the yoke part iron core to form a stator assembly after being manufactured, the invention is suitable for a fractional slot winding is also suitable for a distributed winding, the iron core has no slot and almost has no cogging torque, the motor running performance is good, the material utilization rate is high, the design is optimized and flexible, the motor efficiency and specific power are easy to improve, and the automatic production is easy to achieve.

The invention relates to an electromagnetic brake linear motor system and a control method of the electromagnetic brake linear motor system, and belongs to the field of motors. A primary iron core of a linear motor in the system is in the shape of a flat plate, the output end of a primary winding is connected with a multi-phase energy absorbing resistor set in parallel, or two multi-phase winding sets are adopted for the primary winding, one multi-phase winding set is connected with the multi-phase energy absorbing resistor set in parallel, and the other multi-phase winding set is connected with an inverter. The control method includes the steps that when the relative speed between a motor and a stator of the linear motor is intermediate speed or high speed, frequency and phase of output current of the inverter are controlled so as to ensure that the linear motor works in a power generation braking mode; when the relative speed between the motor and the stator of the linear motor is low speed, frequency and phase of output current of the inverter are controlled so as to ensure that the linear motor works in a reverse braking mode. The electromagnetic brake linear motor system and the control method of the electromagnetic brake linear motor system are suitable for train braking systems in the rail transit field, motive power machine testing and brake systems of liner driving devices like lifting devices and recreation facilities.

This invention designs a stator surface-mounted doubly salient permanent-magnet motor with complementary winding magnetic paths, which comprises a stator (2) and a rotor (4), wherein the rotor (4) is located on the interior or exterior of the stator (1); the stator (1) is a salient pole structure and is provided with stator teeth (101) protruded out of a yoke part; armature winding slots (102) are formed between the stator teeth; the stator teeth (101) and the armature winding slots (102) are distributed in an alternation manner; integrated armature windings (2) and permanent magnets (3) are arranged on the stator (1), wherein the permanent magnets (3) are arranged on the stator teeth (101) and are located on an air gap between the stator (2) and the rotor (4); the integrated armature windings (2) are arranged on the stator teeth (101) of the stator (1); and the motor disclosed by this invention is simple and firm in structure and has strong torque output capacity and large power density.

The invention relates to an integrated compensation pulse generating set and belongs to the field of a motor and a pulse power. The invention aims to solve the problems of large volume and poor reliability of a current compensation pulse generating set. The integrated compensation pulse generating set comprises an enclosure, a compensation pulse generator, an electric motor and a rotating spindle; both a rotor of the compensation pulse generator and a rotor of the electric motor are fixed on the rotating spindle; both a stator of the compensation pulse generator and a stator of the electric motor are fixed on the inner surface of the enclosure; the electric motor is a high-speed permanent-magnet synchronous motor; and the compensation pulse generator is a hollow-core AC (Alternate Current) compensation pulse generator. The integrated compensation pulse generating set is suitable for a compensation pulse generating set in a small movable electromagnetic transmitting device.

The invention relates to a high-reliability half stator-tooth winded stator-surface mounted permanent magnet motor which comprises a stator (1) and a rotor (4). The rotor (4) is arranged inside or outside the stator (1). The high-reliability half stator-tooth winded stator-surface mounted permanent magnet motor is characterized in that: the stator (1) is in a salient pole structure and provided with stator teeth (1-1) which protrude from a yoke part; armature winding slots (1-2) are formed among the stator teeth (1-1), the stator teeth (1-1) and the armature winding slots (1-2) are distributed alternatively, the stator (1) is provided with a centralized armature winding (2) and permanent magnets (3), and only half of the stator teeth (1-1) are winded by armature winding coils and provided with the mounted permanent magnets so that half of permanent magnets is saved and the areas of the armature winding slots are increased. Only half of the stator teeth (1-1) are dotted with the permanent magnets (3), and the magnetizing directions of the permanent magnets (3) are same between the gap of the stator (1) and the rotor (4). The centralized armature winding (2) is arranged on the stator teeth (1-1) of the stator (1) provided with the permanent magnets. The high-reliability half stator-tooth winded stator-surface mounted permanent magnet motor has the advantages of simple and firm structure, strong torque output capacity, large power density and high reliability.

The invention discloses a method for reducing the locating moment of a permanent-magnet type motor of a stator based on an auxiliary groove of a rotor. The auxiliary groove is arranged on the rotor to increase upper harmonic component generated by magnetic conductance of an air gap tooth space, so that the fundamental frequency of the generated locating moment is increased, while the amplitude is correspondingly reduced. As the dimension of the auxiliary groove of the rotor is optimally designed, the idle load electric potential of the motor can be guaranteed when the locating moment is reduced, and the performance index such as torque output capability and the like can not be influenced. In the structure, the invention maintains the advantages of being compact and simple, good in robustness and suitable for high speed running of the permanent-magnet type motor of the stator; the volume of the motor is not needed to be additionally increased, and on the contrary, the magnet core quantity of the rotor can be reduced. Compared with other ways used for reducing the locating moment, the technical method is simple, convenient and effective, has low cost and is especially suitable for the permanent-magnet type motor of the stator, thus the type of motor has better application prospect in the fields such as a direct drive type aerogenerator, hybrid vehicle, etc.

A two-phase fractional slot air core compensation pulse generator including stator and rotor, the stator comprises a two-phase armature winding, A 90 DEG electric angle difference exists between thattwo-phase armature winding, the two-phase armature winding consists of two coils, All coils of the two-phase winding are concentric centralized windings, all the coils of the two-phase winding are uniformly distributed in the stator space, the coils of different phases are staggered, and there is no gap between two adjacent coils, A rotor includes an excitation winding, the excitation winding consists of six excitation coils, the above-mentioned pulse generator is a pulse generator with two phases, Four-slot, six-poles, and satisfies the slot pole number combination constraint condition of fractional slot winding with pitch of 1, thus avoiding the cross-overlap problem of the ends of different phase coils of the traditional distributed winding, greatly reducing the manufacturing difficultyof the stator winding of the air-core pulse generator, and the discharge output capability of the motor can be effectively improved.

The invention discloses a hybrid excitation type magnetic flux switching motor with K-shaped stator cores, and belongs to the technical field of fabrication of a motor. Permanent magnets, armature windings and single-phase excitation windings are arranged at a stator part, stator cores are in K shapes, each permanent magnet is embedded between adjacent stator cores, the armature windings are three-phase concentrated windings which are wound at inner sides of stator teeth of adjacent K-shaped stator cores at two sides of each permanent magnet in a bridging way, the single-phase excitation windings are wound at outer sides of two stator teeth of each K-shaped stator core in a bridging way, and no permanent magnet and no winding are arranged at a rotor part. The hybrid excitation type magnetic flux switching motor is compact, simple and firm in structure, the no-load magnetic flux of the magnetic flux switching motor is maintained to be dual-polarity characteristic, meanwhile, a hybrid excitation function is achieved, the magnetic flux switching motor has relatively high torque output capability and relatively high power density, the regulation range of an air-gap magnetic field is broaden by adjusting an excitation current, and the magnetic flux switching motor is good in magnetic regulation performance.

The invention relates to a linear permanent magnet motor operating mechanism of a high-voltage circuit breaker, comprising a stator core, a rotor core, drive rods and permanent magnets, wherein the stator core is a box body; the rotor core is arranged in the stator core; the drive rods arranged on both ends of the rotor core penetrate through shells positioned on the upper and the lower ends of the rotor core and can move up and down; the side wall of the stator core is provided with the permanent magnets; upper and lower adjacent permanent magnets are opposite in polarity; the permanent magnets positioned on the left and the right edges of the box body are same in polarity placement directions; stator salient poles with the number of integral multiples of a phase number are arranged on the inner side wall of the stator core and between the two adjacent permanents and are provided with armature coils; the outer side wall of the rotor core is provided with rotor salient poles; when therotor core is positioned on a highest position, the stator salient pole positioned on the uppermost end of the stator core just faces to the rotor salient poles; and when the rotor core is positionedon a lowest position, the stator salient pole positioned on the lowest end of the stator core just faces to the rotor salient poles.

The invention discloses an odd-pole three-phase linear permanent-magnet vernier motor, comprising an armature winding, a primary iron core yoke part, a primary iron core tooth part, permanent magnet poles and a secondary iron core, wherein the permanent magnet poles are uniformly distributed on the secondary iron core in the form of an array, and the polarities of adjacent permanent magnet poles are opposite; the armature winding, the primary iron core yoke part and the primary iron core tooth part form a motor primary stage; the permanent magnet poles and the secondary iron core form a motorsecondary stage; and an air gap exists between the linear motor primary stage and the linear motor secondary stage, and the linear motor primary stage and the linear motor secondary stage can move relative to each other. According to the invention, the constraint that the number of effective permanent magnet poles in a traditional linear permanent-magnet vernier motor is an even number is eliminated, and the concept of odd poles is provided, so the number of the effective permanent magnet poles of the linear permanent-magnet motor can be an odd number, a possible pole groove matching scheme isexpanded, and the design freedom degree of the linear motor is improved; and while the high thrust density characteristic of the linear permanent-magnet vernier motor is maintained, and the horizontal thrust fluctuation and the longitudinal magnetic tension fluctuation of the linear permanent-magnet vernier motor are reduced, so the control precision and the response speed of the motor are improved.

The invention relates to a stator of a wheel hub motor for an electric vehicle, which comprises an iron core and support, wherein the iron core is composed of tooth ribs, a yoke part and tooth grooves, the iron core is arranged on the outer side of the support, at least three Hall grooves are formed in the end part of the same side of the iron core, the three Hall grooves are located on the toothribs of the iron core and are distributed in a circumferential manner, the symmetrical center lines of the three Hall grooves are intersected in pairs, the symmetrical center line of the middle Hall groove in the three Hall grooves and the symmetrical center lines of the Hall grooves located on the two sides of the middle Hall groove form an included angle [alpha] and an included angle [beta] respectively, the number of tooth grooves of the iron core is 48, the included angle [alpha] ranges from 22 degrees to 26 degrees, and the included angle [beta] ranges from 36 degrees to 40 degrees. The stator has the advantages that the tooth groove structure is optimized, the position of each Hall groove is reasonably arranged, the precision of a motor commutation point is improved, the problem thata groove opening Hall is difficult to install and prone to deviation is solved, the stator adapts to a single-wire multi-turn winding process, a magnetic circuit is optimized, the motor efficiency isimproved, a groove wedge is removed, and the stator groove utilization rate is increased.

The invention provides a long-stroke linear permanent magnet motor operation mechanism of a high-voltage breaker. Long-stroke linear permanent magnet motor operation mechanism of high-voltage breaker is characterized in that the operation mechanism comprises a stator core, a rotor core, a driving rod and a permanent magnet, wherein the stator core is a box body; the rotor core is disposed in the stator core; the driving rod disposed at two ends of the rotor core passes through the upper and lower end shells of the stator core and can move up and down; the inner side wall of the stator core isprovided with a stator salient pole; the permanent magnet is disposed in the stator salient pole; the polarities of the upper and lower adjacent permanent magnets are opposite; the polarity arrangingdirections of the permanent magnets at left and right sides of the box body are the same; the stator salient pole is provided with an armature coil; the top part of the stator salient pole is provided with a pole shoe; the outer side wall of the rotor core is provided with a rotor salient pole; when the rotor core is located at the highest position, the lower half section of the stator salient pole at the uppermost end of the stator core faces the rotor salient pole; when the rotor core is located at the lowest position, the upper half section of stator salient pole at the lowest end of the stator core faces the rotor salient pole.