34results about How to "Improve flux utilization" patented technology

The invention discloses a permanent magnet synchronous motor (PMSM) with two stators, a composite rotor structure and radial and axial mixed magnetic paths and a method thereof. The PMSM comprises a radial stator, an axial stator and a rotor, wherein the rotor is inserted in the radial stator and coaxially arranged with the radial stator, the axial stator is arranged on one end or two ends of the rotor, the axial stator and the rotor are concentric, a radial winding is arranged in the stator groove of the radial stator, an axial winding is arranged in the stator groove of the axial stator, a rotor groove is arranged in the rotor, a permanent magnet is placed in the rotor groove, the permanent magnet enables the rotor to generate a radial magnetic pole and an axial magnetic pole, the radial magnetic pole faces the radial stator of the motor, the axial magnetic pole faces the axial stator of the motor, and the motor generates radial and axial torques to form mixed magnetic paths. The radial magnetic flux and axial magnetic flux generated by the permanent magnet of the motor can be utilized, end portion magnetic leakage can be eliminated, the utilization rate of motor material is improved, and the weight of the motor is reduced.

The invention discloses a double-rotor hybrid excitation permanent magnet synchronous motor for an electric vehicle and a method thereof. The motor comprises a radial stator, an axial rotor and a radial rotor. The radial rotor is placed inside the radial stator and is coaxially arranged with the radial stator. The radial rotor is provided with the axial rotor at the end portion, and the axial rotor is coaxially arranged with the radial rotor. The axial rotor is driven by a servo motor to rotate, so that the axial rotor and the radial rotor maintain the same rotational speed. The radial rotor is provided with a permanent magnet thereon. A part of the magnetic flux generated by the permanent magnet enters the radial stator through a radial gap to generate a radial main magnetic flux, and theother part enters the axial rotor through an axial air gap to generate an axial main magnetic flux. The axial magnetic flux and the radial magnetic flux are in a parallel relationship. The axial magnetic flux of the radial rotor can be adjusted by changing the relative positions of the axial rotor and the radial rotor. Therefore, the radial magnetic flux of the radial rotor is indirectly controlled, the hybrid excitation function is achieved and the economic operating range of the electric vehicle drive motor is expanded.

The invention provides a high-power density electric motor with characteristics of axial and transverse magnetic fields. The high-power density electric motor is a permanent magnet motor which is of a disk type structure and composed of a stator, a rotor, an end cap, a shaft, a stator bearing and an end cap bearing. The rotor is arranged on the shaft, the two ends of the shaft are respectively mounted with the stator bearing and the end cap bearing; the stator bearing is mounted in a stator bearing chamber, the end cap bearing is arranged in an end cap bearing chamber; the stator and the end cap are fixed together through a through hole on a magnet ring at the outside of the stator and a screwed hole on the end cover by using a screw. The high-power density electric motor of the inventionimproves the structure of the traditional electric motor and the placement of an armature winding, so that the end of the armature winding can also be involved in electromechanical energy conversion of the electric motor; and as a result, power density and overall performance of the electric motor are improved.

The invention provides a high-power density motor with a multifunctional magnetic field, which comprises a stator, a middle rotor, a left rotor, a right rotor, a left bearing, a right bearing and a hollow shaft, wherein the stator is fixed on the hollow shaft; the left and right rotors are positioned on the left and right sides of the stator respectively and connected with the hollow shaft through the left bearing and the right bearing respectively; the middle rotor is positioned between the left and right rotors and fixedly connected with the left and right rotors respectively; and the hollow shaft is fixed with other outside devices. The high-power density motor is an outer rotor permanent motor characterized in axial, radial and transverse magnetic field motors. The structure of the traditional motor and the placement mode of armature winding are improved and the end part of the winding can also be participated in the electromechanical energy conservation of the motor, so that the power density and the overall performance of the motor are improved.

The invention discloses an LED light source and an LED light source module formed by a plurality of the LED light sources. The LED light source comprises an LED luminous body and a reflector set, wherein the reflector set comprises two or more reflector units which are mutually independent; the horizontal cross section outline of the inner surface of each reflector unit is a straight line, or an inner arc-shaped curve, or an outer arc-shaped curve, or the combination of two line shapes; all reflector units are respectively arranged in different positions of the exterior of the LED luminous body, one reflector unit is respectively arranged before and after the front and rear sides of the LED luminous body, and the side wall of the reflector set is not closed, or discontinuous; one part of the ray sent out by the LED luminous body is reflected by the inner surface of the reflector set. The LED light source provided by the invention can achieve reasonable unsymmetric form batwing light distribution suitable for street lighting, so as to enable more rays to be guided to a direction having lighting utilization value, and unnecessary ray waste is reduced.

The invention provides a dual three-phase permanent magnetic synchronous motor, an electric automobile and a method of the dual three-phase permanent magnetic synchronous motor. Compared with a traditional multi-phase motor, dual three-phase permanent magnetic synchronous motor has the advantages that by placing an axial stator on an end portion of a rotor, the end portion of the rotor is made full use of, magnetic leakage effect of the end portion is reduced, a use ratio of a permanent magnet is increased, a better magnetism gathering effect can be generated since a permanent magnet is placedon a surface of an axial end of the rotor of the motor, the motor is enabled to be higher in iron core magnetic flux density and air gap magnetic flux density, a use ratio of an iron core material ofthe motor is increased, weight of the motor is reduced, power density and torque density of the motor are increased remarkably, and the weight of the motor is furtherly reduced; a magnetic circuit ofan axial end portion, without the permanent magnet, of the rotor of the motor is parallelly connected with a radial magnetic circuit of the motor, by regulating the mixed magnetic circuits, an operation range of constant power of the motor can be enlarged, and the defect that the power density and efficiency are decreased after the operation range of the constant power of a traditional permanentmagnetic synchronous motor is enlarged is overcome.

The invention relates to a design method of a remanent magnetism mechanism of a recombiner and a remanent magnetism mechanism. The design method uses silicon iron as the material of the magnetic conduction loop of the remanent magnetism mechanism of the recombiner, and concretely comprises the following steps: (1) making the silicon iron material into a magnetic yoke; arranging a cavity in the magnetic yoke, and arranging a closing coil in the cavity; arranging a through hole in the middle of the bottom of the cavity; (2) arranging a movable iron core in the middle of the closing coil, and driving a pull rod by using the movable iron core; arranging an elastomer in the middle of the closing coil, wherein the elasticity of the elastomer onto the movable iron core is opposite to the direction of the magnetic force of the electrified closing coil onto the movable iron core, so the elastomer and the closing coil control the movement of the movable iron core in the axial direction of the closing coil together; the pull rod penetrating through the through hole from the bottom of the cavity; and (3) using the external wall of the magnetic yoke as the casing of the remanent magnetism mechanism of the recombiner. Compared with similar mechanisms, the technical scheme of the invention has the advantages of stable performance, low energy consumption and long service life of the electronic control device, and is especially suitable for 24kV recombiners.

The invention discloses a permanent magnet motor rotor and a motor. The permanent magnet motor rotor comprises a rotor assembly, 2n (n=1, 2, 3...) built-in rectangular grooves are formed in the rotor assembly along the circumferential surface, the rectangular grooves are linear, magnetic isolation edges are arranged at the two ends of the outer sides of the rectangular grooves, magnetic isolation bridges are arranged at the positions of central symmetry lines of the rectangular grooves, and the number of the magnetic isolation bridges can be set to be zero when the linear speed Vtip of the motor rotor is low, otherwise, the number can be set to be one. According to the linear speed (mechanical centrifugal force of the outer surface of the rotor) of the rotor, the width of the magnetic isolation edges and the number and width of the magnetic isolation bridges are reasonably designed, so that the rotor assembly and the permanent magnets do not move left and right in the rectangular grooves, and the mechanical strength under the centrifugal force is guaranteed; therefore, the magnetic field effect and the output electrical performance of the motor are satisfied, the vibration resistance of the motor rotor is improved, and the rotating speed range of the motor is effectively expanded.

The invention discloses a stator duplex-winding permanent magnet motor with alternating current magnetic regulation. The permanent magnet motor comprises a stator assembly and a rotor assembly which are coaxially installed, the rotor assembly is located in the stator assembly, the stator assembly comprises a stator iron core, an armature winding and an excitation winding, the rotor assembly comprises a transmission shaft, a rotor iron core and tangential permanent magnets, a plurality of magnetic barriers which are symmetrical about the center of the transmission shaft are arranged in the rotor iron core, and the magnetic barriers are cavities extending in the axial direction of the rotor iron core; the armature winding and the excitation winding are located in a stator groove of the stator iron core, the tangential permanent magnets are embedded and installed in the rotor iron core at intervals, and the magnetizing directions of the adjacent tangential permanent magnets are opposite; and the two sides of each tangential permanent magnet are each provided with a magnetic barrier, the rotor iron core part between the adjacent magnetic barriers forms a main magnetic pole of the rotor assembly, and the stator iron core and the rotor iron core are separated by a main air gap. According to the invention, by controlling the amplitude and phase of the excitation winding current, efficient adjustment of the main air-gap magnetic field of the permanent magnet motor is realized.

The invention provides a hybrid magnetic circuit permanent magnet synchronous motor for an electric automobile and a driving method of the hybrid magnetic circuit permanent magnet synchronous motor. The hybrid magnetic circuit permanent magnet synchronous motor comprises radial stators, an axial winding, radial windings and solid rotors, and the two sections of coaxially connected rotors are arranged in the two radial stators and are coaxially arranged with the radial stators; the axial winding is concentrically placed in the middle of the two sections of rotors and equally divides the rotorsinto two parts in the axial direction, permanent magnets are placed in the rotors to generate radial magnetic poles and axial magnetic poles, and one part of magnetic flux generated by the permanent magnets enters the radial stators through the radial magnetic poles and then is interlinked with a radial armature winding to form radial main magnetic flux; the other part is linked with an axial armature winding through the axial magnetic poles to form axial main magnetic flux and finally returns to the permanent magnet of the rotor on the other side, and the radial main magnetic flux is connected with the axial main magnetic flux in parallel; according to the invention, the magnetic flux leakage effect of the end part of the motor is weakened, the material utilization rate is improved, the power density is improved, the magnetism-increasing operation and the flux-weakening speed-expanding operation can be flexibly realized, and the economic operation range of the motor is broadened.