58results about How to "Small excitation loss" 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 provides an energy-saving effective permanent magnetic brushless rotation motor which starts and runs stably and has low cost. The motor owns two air gap magnetic fields at the magnetic poles of two ends; the deformed rotor permanent magnet or stator electromagnet leads the rotor magnetic pole (or stator magnetic pole) to be staggered by a certain of pole distance at the air gap magnetic fields of two ends; furthermore, the air gap magnetic field at one end of the motor is led to be less than the air gap magnetic field at the other end by technical means, thus leading the motor to keep directional rotation without a starting device. The rotor magnetic poles are intermittently arranged in pairs according to N, S and the like. The stator can be a conversion-typed stator and a commutation-typed stator; all coils at one end of the conversion-typed stator have the same polarity (N-pole or S-pole; the polarity of the coils at the other end are all S-pole or N-pole); the polarity of the magnetic pole of the commutation-typed stator coil is intermittently arranged in pairs according to N, S and the like; and the magnetic pole of the alternating current commutation-typed stator is intermittently arranged in pairs according to N, N, S, S and the like. The quantity of the rotor magnetic poles and the stator magnetic poles is configured according to the proportion of 1:1 or 1:2 or 2:3.

The invention relates to a double salient electro-magnetic motor for magnetism increasing electricity generation, which is a special electric generator. The negative terminals of all the phases of windings of the generator are connected together, and are led out through a wire; the negative terminals are used as the cathode of the generating system of the double salient electro-magnetic motor. Each phase of the windings is separately connected with the anodes of diodes; the cathodes of the diodes are connected to a point and are led out through a wire; the cathodes of the diodes are used as the anodes of the double salient electro-magnetic motor for magnetism increasing electricity generation. The anode and the cathode of the double salient electro-magnetic motor for magnetism increasing electricity generation are separately connected with the anode and the cathode of a load to supply power for the load. The invention is characterized in that the voltage regulation rate and the excitation loss are reduced by utilizing the magnetism increasing armature reaction of the load, and the invention applies the basic electromagnetic property of the double salient electro-magnetic motor, thereby improving the performance of the double salient electro-magnetic motor for magnetism increasing electricity generation.

The invention belongs to the field of pulse power generators and discloses a permanent-magnet axial-flux semi-hollow pulse power generator comprising a rotor, a stator, a rotating shaft, a housing, and an end cap. The rotor comprises inner and outer magnetic poles, a permanent magnet and a compensation plate. The permanent magnet is arranged between the inner and outer magnetic poles of the rotor. The inner and outer magnetic poles cooperate with the permanent magnet to convert radial flux into axial flux. The compensation plate covers the tops of the inner and outer magnetic poles. The rotor rotates together with the rotating shaft. The stator is formed by pouring non-magnetic material on a winding and is fixed on the housing. The magnetic conductive material of the rotor and the non-magnetic conductive material of the stator form a semi-hollow structure. The semi-hollow pulse power generator simplifies a motor excitation system, reduces excitation loss, and increases motor efficiency. Brushless structure increases the reliability of the motor.

A double-feed composite magnetic pole permanent-magnet electric motor belongs to the technical field of electric motors. The electric motor comprises a stator core installed in a machine housing, a stator comprising a machine winding, a rotor provided with a magnetic pole, a rotating shaft and a stator core; the machine winding comprising a main winding and a harmonic wave control winding and distributed in a stator groove; the magnetic pole of the rotor, which comprises a permanent magnetic pole and a ferromagnetic pole; the winding is arranged on the rotor, and number of poles of the main winding is equal to that of the rotor; the number of poles of the harmonic wave control winding is equal to that of the ferromagnetic pole; the double-feed composite magnetic pole permanent-magnet electric motor has the advantages of simple structure, high reliability, high power density of the electric motor, low voltage waveform distortion factor, no axial magnetic circuit and additional air gap, short magnetic circuit, small excitation loss and high efficiency, therefore, the optimization design of magnetic circuit distribution and the machine winding is facilitated; the two-way control of increasing and reducing magnet is achieved for the harmonic control winding current, high capacity to adjustment of magnetic field is provided, and the electric motor is ensured to meet the requirement for wide range of the running speed.

A salient pole wound rotor asynchronous motor includes two parts of stator and rotor. The stator is composed of an armature core stacked by grooving silicon steel sheet and m1 phase P symmetrical alternating current winding embedded in the iron-core groove; the rotor is provided with np convex magnetic poles locating on the circumference uniformly and back yoke iron, wherein the np meeting the relation: 2P < np < 4P, and the np being the power function of the rotor phase number m2. An AC coil is embedded on each of the rotor salient pole, np salient poles correspond to np AC coils, which are divided into m2 groups on relative positions in the central line of the salient poles in a air-gap magnetic field, the coils of each group being linked to form phase windings based on the polar of the magnetic field; and infusing symmetrical AC current with rotary difference frequency of m2 into the rotor m2 phase windings. The motor of the invention can improve operation performance of the salient pole wound rotor asynchronous motor, and be suitable for the fields of wind power generation, hydraulic power generation and industry velocity modulation and the like.

The invention relates to a hybrid excitation permanent magnet motor with secondary harmonic excitation, which is characterized by comprising a housing, wherein a stator consisting of a stator iron core and a stator winding and a rotor consisting of a permanent magnet, a rotating shaft, a rotor iron core and a rotor winding are configured in the housing; the stator iron core is fixed in the housing, the stator winding is distributed in a groove which is formed on the stator iron core along the circumferential direction; and the rotating shaft is connected with the housing by rotation, the rotor iron core is arranged on the rotating shaft, the permanent magnet and the rotor winding are arranged on the rotor iron core, the permanent magnet, the rotor winding and the rotor iron core can rotate along with the rotating shaft, and the rotor winding consists of a secondary harmonic winding and a rotor excitation winding.

The invention discloses a magnetic suspension and magnetic drive multi-axis flexible transposition device. The device can achieve magnetic force suspension, magnetic force drive rotation and horizontal movement through the arrangement of a suspension device, a rotation device and a horizontal movement device. After the device stably works, no mechanical contact exists among the structures in the horizontal movement and rotation process, abrasion caused by mechanical friction is avoided, and the problem of platform shaking caused by crawling and uneven track connectors due to mechanical contact is solved. When the device is used for welding, the welding requirement for welding lines of any lengths can be met, welding curve welding is achieved through coordination of the rotation speed and the horizontal movement speed, and excellent dynamic response and motion precision are achieved. The magnetic suspension and magnetic drive multi-axis flexible transposition device is suitable for precise welding, movement and rotation of workpieces such as complex and small flanges and end sockets, and meanwhile the magnetic suspension and magnetic drive multi-axis flexible transposition device is suitable for cutting, checking and the like of medium-small-sized workpieces.

The invention relates to a hybrid excitation multi-phase reluctance motor and a power generation system, belongs to the field of motors, and solves the problem of narrow adjustment range of the magnetic field of the existing hybrid excitation reluctance motor. The air gap magnetic field is adjustable and the excitation loss is reduced by using the hybrid excitation electromagnetic structure of joint excitation of current and permanent magnets. The excitation winding and the armature winding are both arranged on the stator, and there is no brush or slip ring on the rotor. The system has high reliability and convenient maintenance, and the structure of the motor is changed by changing the winding mode of the excitation winding and the armature winding and the permanent magnet distribution mode. The system is suitable for the fields of power supply of airplanes, ships and locomotives, power generation of new energy sources such as wind energy, solar energy, ocean wave energy and the like,flywheel energy storage, electric vehicle drive and the like.

The invention discloses an electromagnetic coupling excitation speed governor which is connected between an electric motor and a load and comprises an outer shell, an outer rotator, an inner rotator and an excitation winding. The outer rotator is a magnetizer in a whole cylindrical structure, one end of the outer rotator is connected with an output shaft of the electric motor, and a conductor for generating an induction current is arranged on the inner surface of the outer rotator. When the excitation winding is energized, a plurality of pairs of magnetic poles between an N phase and an S phase are generated on the outer surface of the inner rotator which rotates together with the conductor of the outer rotator through electromagnetic coupling, and the aim of controlling speed is achieved by changing an excitation current. The speed governor can lessen the excitation loss, improve the transmission efficiency, has simple structure and assembly without harmonic pollution to a power grid, not only prolongs the service life, but also decreases the cost.

The invention provides an electric-power generation all-in-one machine with a radiator fan for a tractor. The electric-power generation all-in-one machine is composed of a shaft, the radiator fan, a bearing, a motor end cover, two rotor cores, two armature windings, a stator core, excitation windings, a shell and a belt pulley. The two disk-shaped rotor cores are respectively fixed on the shaft, and 4N circular ring fan convex rotor poles are arranged on one surface opposite to the stator core of each rotor core. The stator core fixed on the shell is composed of four fan-shaped modules which are uniformly distributed in the circumferential direction, and one excitation winding is twisted along the axial center of each fan-shaped module. Three stator poles are arranged on an end face of each fan-shaped module, and each stator pole is provided with a first armature winding. The radiator fan is fixed at a tail end of the shaft. When the electric-power generation all-in-one machine works in a motor mode, a motor drives the radiator fan to rotate; and when the electric-power generation all-in-one machine works in a generator mode, an engine drives the two rotor cores and the radiator fan to rotate to realize dual purposes of one machine.