75results about How to "Short magnetic circuit" patented technology

The invention discloses a fault-tolerant type four-phase switch reluctance motor used for driving of an electric automobile. A stator is composed of a stator yoke and stator teeth. The stator teeth are formed by eight wide teeth and eight narrow teeth which are distributed along the circumferential direction of the internal circle of the stator yoke in a mutually alternating way. A rotor is composed of rotor iron core blocks and a rotor sleeve. There are ten rotor iron core blocks which are evenly distributed along the circumferential direction of the external circle of the rotor sleeve and fixedly embedded in the rotor sleeve so that the cylindrical rotor is formed by the rotor iron core blocks and the rotor sleeve together. One stator winding is wound on the eight wide teeth in a concentrated way, and winding directions on the adjacent wide teeth are identical so that NNNNSSSS polar distribution is formed, and the windings on the two opposite wide teeth are forwardly connected in series into a phase. Torque output capability is enhanced under the situation that the motor is not aligned in position. The separated rotor iron core blocks are adopted to embedded in the non-magnetic-conductive rotor sleeve so that the magnetic circuit is shorter, magnetic leakage is reduced and wind resistance is low. The narrow teeth with no winding can be used as the loop of magnetic flux to realize a shorter magnetic circuit and can also be used for isolation.

The invention discloses a permanent-magnet-biased axial magnetic bearing in the technical field of magnetic bearings. The permanent-magnet-biased axial magnetic bearing comprises a stator assembly and a rotor assembly; the stator assembly comprises an axial stator, an axial control winding, a septum magnet, a magnetizer and a permanent magnet; the rotor assembly comprises a rotation shaft and a rotor core; the axial control winding is wound on a magnetic pole of the axial stator; the rotor core is sleeved on the rotation shaft; the magnetizer is arranged in the axial stator, and the external end of the magnetizer is connected with the internal end of the axial stator; the septum magnet is arranged in the axial stator, the external end of the septum magnet is connected with the internal end of the axial stator; the permanent magnet is adhered to one side of the magnetizer, and the external end of the permanent magnet is contacted with the inner end face of the septum magnet; and the rotor core is arranged in the axial stator. The permanent-magnet-biased axial magnetic bearing has a simple structure, and is high in critical rotation speed, and low in power consumption; and magnetic flux flows in an axial direction and is decoupled with the radial suspension force completely, so the permanent-magnet-biased axial magnetic bearing is convenient to control.

The invention relates to a serial-magnetic-circuit hybrid-excitation permanent magnet motor, which comprises a case. A stator consisting of stator core and a stator winding, and a rotor consisting of a permanent magnet, a rotating shaft, a rotor core, an excitation winding and a nonmagnetic material are installed in the case. The stator winding is distributed in a slot which is circumferentially arranged in the stator core. The permanent magnet and the excitation winding are arranged on the rotor core. Magnetic motive force sources established by the permanent magnet and the excitation winding are connected in series in the form of magnetic circuits. The nonmagnetic material is arranged between the rotor core and the rotating shaft. By adjusting the current of the excitation winding, the air-gap magnetic field of a motor can be conveniently adjusted. The excitation winding is only used for realizing the auxiliary adjustment of the air-gap magnetic field and the effect of the permanent magnet is fully exerted; the main magnetic field adjusting capacity is better; the structure of the serial-magnetic-circuit hybrid-excitation permanent magnet motor is similar to the structure of a common synchronous motor, the power density is higher, and the optimization design of the motor winding and the magnetic pole shape is facilitated to obtain sinusoidal voltage waveform; and an additional air gap and an axial magnetic circuit do not exist.

A wheel hub driving device with planetary motors comprises the planetary motors and planetary mechanisms. Each planetary motor comprises a gear ring stator and a plurality of planetary rotors radially arranged on the inner side of the gear ring stator; each planetary mechanism is used for matching rotate speed and torque of each planetary motor and a wheel hub and comprises a planetary carrier, a gear ring and a plurality of planetary gears; the planetary gears are radially arranged on the inner side of each gear ring; the planetary gears are meshed with the corresponding gear rings so as to enable the planetary gears to roll along the inner peripheries of the gear rings; the planetary gears are respectively in one-to-one correspondence to the planetary rotors, and the planetary gears are respectively coaxially connected with the planetary rotors; the planetary gears are respectively rotatably connected with the planetary carriers through rotating shafts so as to enable the planetary carriers to rotate with the planetary gears relate to the gear rings. The wheel hub driving device is higher in power density, reliability and fault safety. The invention further provides a wheel power system adopting the wheel hub driving device.

The invention provides an inter-phase electromagnetic decoupling flat permanent magnet synchronous straight line motor, which relates to the motor field and solves the problems that: the magnetic coupling existed between the phases influences the control precision of the current, and a magnetic path passed by a magnetic flux generated by each phase of winding is too long to cause a large consumption of the stator iron. The primary grade of the inter-phase electromagnetic decoupling flat permanent magnet synchronous straight line motor comprises phase units, wherein each phase unit comprises phase unit iron cores and phase unit windings; each phase unit iron core composes the phase unit iron core including tooth holes with 2k iron core units; the tooth holes are formed by superposing tooth grooves; each iron core unit is composed of two teeth and a magnetic yoke section; the two teeth are arranged along a horizontal direction of the cross section; the magnetic yoke section is connected between the two teeth; the 2k iron core units are arranged in a shell at interval along a moving direction; coils are wound into the phase unit winding through the tooth holes; when the motor is the m-phase motor, im phase units are existed therein; a centre distance L between two adjacent phase unit iron cores is L=[(j-1)+1 / m]tp. The inter-phase electromagnetic decoupling flat permanent magnet synchronous straight line motor is used as the motor or a generator.

The invention provides an asymmetric double-stator hybrid excitation type axial magnetic field flux switching motor. The asymmetric double-stator hybrid excitation type axial magnetic field flux switching motor comprises a first stator, a second stator and a rotor which are coaxially mounted, the first stator comprises a plurality of magnetic conductive iron cores and permanent magnets which are alternately arranged, each magnetic conductive iron core comprises two stator teeth a and a stator yoke part connected with the stator teeth a, parallel grooves a are formed between the two stator teeth a, and armature windings are wound between the adjacent stator teeth a of the adjacent magnetic conductive iron cores; the second stator is provided with a plurality of T-shaped grooves, the T-shaped grooves divide the second stator into a plurality of stator teeth b of a double-tooth structure, parallel grooves b are formed between double teeth of the stator teeth b, and the adjacent teeth of the adjacent stator teeth b are wound with armature windings and exciting windings at the roots of the stator teeth b; the rotor is arranged between the two stators, an air gap is reserved between therotor and the two stators, the rotor comprises a non-magnetic-conductive ring and a plurality of rotor teeth, and the rotor teeth are evenly distributed in the circumferential direction of the non-magnetic-conductive ring.

The invention provides an open-type transformer three-dimensional wound iron core. The gist of the invention is that it consists of three identical core frames made of silicon steel sheets, and each core frame is surrounded by an upper half frame and a lower half frame to form six Composed of border frames; the upper half frame has two left and right upper half frame chamfered edges, the lower half frame has left and right lower half frame chamfered edges, and the silicon steel sheets on the same side of the upper and lower half frames are staggered Arrangement, the silicon steel sheets of the two chamfered sides on the same side are inserted together to form the chamfered side of the iron core frame, and each layer of silicon steel sheets is connected at the bend of the silicon steel sheets. The positive effect of the invention is that the position of the joint of the iron core is completely outside the coil, and the position of the joint can be tightened very conveniently after being inserted into the coil, which is very beneficial to reducing the noise and loss of the transformer. If a fault occurs, the upper half frame of the iron core can be removed conveniently and the coil can be pulled out for maintenance.

The invention discloses a plastic electronic horn. A common car horn uses an iron shell, and an iron gland bush is riveted with a steel membrane to form a sound-producing device. The horn with the structure has high cost, heavy weight, complex manufacture craft, high energy consumption, common sound effect and not high enough sound level. The invention comprises a coil (4); the coil (4) is linkedwith an iron bowl (6); the iron bowl (6) is linked with a plastic shell (5); and the opening of the iron bowl (6) is linked with a steel vibrating sheet (3). The invention relates to an electronic horn used for a car.

This invention relates to a sandwich structure of an intelligent material of magnetic flow change solution including magnetic flow changed solution, an excitation coil generating magnetid field and up and down sandwich beams, in which, the magnetic flow changed solution and the excitation coil are inserted in the matrix of the up and down sandwich beams, and the solution, the excitation coil and the matrix are combined to one unit, which can alter the rigid and damp of the structure by altering input current.

A dry power transformer comprises an iron core, a low-voltage coil (13), an insulative layer (14), an upper clip member (10), a lower clip member (11), a high-voltage connecting terminal (16) and a low-voltage connecting terminal (12). The iron core is configured that a two-square-shaped rectangular frame is constructed by abreast arranging two open rolled iron cores with square shapes and indent semiellipse sections, and the two-square-shaped rectangular frame is packaged in an open rolled iron core rectangular frame with a convex semiellipse section. The sections of three columns of the iron core after assembling can be ellipses, step shapes (external ellipses) or polygons (external ellipses). Because of the open characteristic of the iron core, the coil can be winded singly. The coil can be mounted or replaced by opening the iron core at a U-shaped position of an open slot during production and maintaining, so that the whole process is convenient.

The invention relates to a tangential / radial parallel hybrid excitation synchronous motor, belonging to hybrid excitation synchronous motors. Wherein, the stator is made up of a stator core and an armature winding, etc, the rotor is made up of a rotor core(3), a permanent magnetism piece(10),an excitation winding(4) and a rotating shaft(9),etc; the tooth of the rotor core is wined with excitation coils which are connected to form the excitation winding(4), the magnetic poles of different tools change alternately, the electric excitation field forms a radial structure, the permanent magnetismpiece(10) is inserted between two adjacent pole terminals(31) of the rotor core(3) ,the permanent magnetism field forms a tangential structure and two adjacent permanent magnetism pieces are parallel, and the polarity of the magnetic field is same as that generated by the excitation coils on the magnetic poles, which two together form the main magnetic field. The magnetic filed of the permanent magnetism and the excitation winding is also parallel, the main magnetic field can adjust easily and has the advantages of high excitation efficiency, great power density, convenient control, etc. Themotor with a simple structure can be a main generator of the device of the airplane, naval vessels, vehicle, etc; be a waterwheel, a steamer, an aerogenerator, etc; and also be a motor.