59results about How to "Reduce positioning force" patented technology

The invention discloses a wave power generation device based on a linear magnetic gear motor. The wave power generation device comprises a motor stator core, a motor converter, a magnetism regulating ring, a magnetic gear low-speed moving part, an inner floating barrel and an outer floating barrel. The motor stator core is sleeved with the motor converter, the motor converter is sleeved with the magnetism regulating ring, the magnetism regulating ring is sleeved with the magnetic gear low-speed moving part, the magnetic gear low-speed moving part is sleeved with the inner floating barrel, and the inner floating barrel is sleeved with the outer floating barrel. A first air gap is formed between the motor stator core and the motor converter, a second air gap is formed between the motor converter and the magnetism regulating ring, and a third air gap is formed between the magnetism regulating ring and the magnetic gear low-speed moving part. A motor stator shaft and the magnetism regulating ring are fixed in position, and the magnetic gear low-speed moving part and the inner floating barrel are fixed in position. The wave power generation device has the advantages that no huge speeders need to be additionally arranged, the size is small, energy capture and power generation efficiency is high, and convenience is brought to design, debugging and maintenance of an electrical control system through the whole floating suspended structure.

The invention discloses a modular primary permanent magnetic linear motor and a motor module consisting of the modular primary permanent magnetic linear motor. The modular primary permanent magnetic linear motor comprises a primary and a secondary, wherein the primary comprises m or 2m primary modules; each primary module comprises two U-shaped magneto-conducting materials and a permanent magnet between the U-shaped magneto-conducting materials; and taum, taus, tauul, tauu, wmt and wst satisfy the following relational expressions that tm is equal to or approximate to ktaus, tauul is equal to or approximate to (j+0.5) taus, tauul is equal to taum-tauul, and wmt is less than or equal to wst. Relative displacement between two primary modules which belong to the same phase is lambda1 which is equal to (n+/-0.5)taus or lambda1 which is equal to ntaus, and relative displacement between two primary modules which belong to different phases is lambda2 which is equal to (i+/-1/m)taus or lambda2 which is equal to [i+/-(0.5-1/m)]taus. The motor and the motor module have the advantages of symmetric counter potential, relatively low sine and positioning force, small thrust ripple and the like, and are applied to the places where a long secondary structure linear motor is applied.

The invention discloses a modular complementary type primary permanent magnet linear motor and a motor module formed thereby. The primary permanent magnet linear motor comprises a primary level and a secondary level; the primary level and the secondary level are respectively in a salient-pole structure, and an air gap is formed between the two levels; the primary level comprises a rotor module which comprises a first module and a second module; a first non-magnetic material is arranged between the first module and the second module; the first module and the second module both comprise two salient-pole magnetic materials and a permanent magnet arranged between the two salient-pole magnetic materials; the salient-pole magnetic material is provided with m numbered primary teeth, and a central armature winding is arranged on the primary teeth; the relative displacement between the first module and the second module is calculated as follows: lambda2=(k+/-0.5) tau s; the relative displacement between the adjacent two salient-pole magnetic materials is calculated as follows: lambda1=m*tau m; and the ratio of the primary polar distance to the secondary polar distance is as follows: tau m: tau s=(m+/-1):m. The invention has the advantages of symmetric back electromotive force, relatively small positioning force, low thrust fluctuation and the like and is applicable to the application occasion of a linear motor with a long-stator structure.

The invention relates to a high-thrust permanent magnet direct drive linear electric motor, comprising a motor primary and a motor secondary, wherein the motor primary comprises a primary iron core (1) with a slot, an armature winding (2), primary pole shoes (3) and permanent magnets (4), wherein the armature winding (2) is embedded into the slot of the primary iron core (1); the permanent magnets (4) are arranged on the surfaces of the primary pole shoes (3); the motor secondary comprises a secondary iron core (6) and secondary salient poles (7); an air gap (5) exists between the motor primary and the motor secondary; and the motor primary is fixed, and the motor secondary linearly moves along with the motion direction of a motor. The motor comprises a unilateral flat-plate structure, a bilateral flat-plate structure, and a cylindrical structure. In the high-thrust permanent magnet direct drive linear electric motor, the special structures of the motor are utilized to modulate the air gap reluctance distribution of the motor. When the motor is in operation, the movement velocity of a permanent magnetic flux in the motor primary is multiplied of that of a permanent magnetic flux in the motor secondary, thus realizing the speed-raising effect. The high-thrust permanent magnet direct drive linear electric motor is applied to low-speed direct drive application occasions, and has the characteristics of high power density, large rated thrust and the like.

The invention discloses a magnetic field modulation permanent magnet linear motor capable of improving winding utilization rate and an optimization design method thereof, and belongs to the field of a permanent magnetism motor. The permanent magnet linear motor comprises a single primary side and double secondary sides. An air gap is arranged between the single primary side and each of the double secondary sides. The single primary side is formed by three unit modules. Each unit module is slotted in the sides close to the air gaps to form four primary teeth and two primary slots. The tooth end of each primary tooth is provided with a plurality of virtual slots and virtual teeth in the motor motion direction, wherein the number of the virtual teeth is larger by one than that of the virtual slots, and each virtual slot is embedded by a magnetic concentrating unit formed by three permanent magnets. Three phases of windings in the primary slots are wounded on yoke portions of the three primary unit modules respectively; and each phase of winding can cut magnetic force lines generated by the permanent magnets on the four primary teeth in the corresponding module simultaneously. The permanent magnet linear motor improves winding utilization rate, reduces half of the winding use amount and reduces copper consumption under the condition of ensuring that performance indexes of no-load counter potential, thrust output, permanent magnet use amount and fault-tolerant capability and the like are not influenced.

The invention discloses a double-permanent-magnet lateral magnetic flux linear permanent magnet motor, and the motor comprises a primary mechanism and a secondary mechanism. The primary mechanism comprises a plurality of primary units in the same structure, and each primary unit comprises a magnetic conduction part and an armature winding. The magnetic conduction part is provided with three projection parts: a main magnetic tooth and auxiliary magnetic teeth located at two sides of the main magnetic tooth. The armature winding is wound around the periphery of the main magnetic tooth. The secondary mechanism comprises a permanent magnet fixing plate and a permanent magnet matrix, wherein the permanent magnet matrix comprises a plurality of permanent magnets which are arranged in parallel. The two rows of permanent magnets are sequentially fixed at two sides of the permanent magnet fixing plate in a one-one corresponding manner. There are gaps between the magnetic conduction part and the permanent magnets. The motor can achieve a purpose that one iron core lamination is corresponding to two parallel magnetic flux loops of one armature winding, is simple in structure, is short in each magnetic loop, is higher in force density, and is smaller in output force fluctuation. The shorter magnetic loop can reduce the eddy-current loss of the motor, improves the efficiency of the motor, and improves the utilization rate of the permanent magnets.

The invention discloses a fault-tolerate primary permanent magnetic vernier linear motor, which is applied to the field of high-reliability linear driving and comprises a primary winding, a secondary winding and an armature winding; the secondary winding is a simple salient pole structure with ladder-shaped teeth and is longer than the primary winding, an air gap exists between the primary and secondary windings, armature teeth with even number are uniformly distributed on the primary winding, a set of concentrated winding is wound on each armature tooth, a fault-tolerate tooth is arranged between adjacent two armature teeth, a permanent magnet with the magnetizing direction being parallel to the central symmetrical axis of the armature is attached to the lower face of each armature tooth, the permanent magnets are uniformly distributed on each armature tooth, the magnetizing direction of each permanent magnet is in N-S and S-N alternative arrangement, and the magnetizing directions of the permanent magnets on all armature tooth are same in arranging sequence; and the height of the fault-tolerate tooth is equal to the sum of the heights of the armature tooth with the face being attached to the permanent magnetic and the permanent magnet. The fault-tolerate primary permanent magnetic vernier linear motor is simple in structure, large in pushing force, small in pushing force pulse, high in reliability and strong in the running property of the motor with the fault and fault-tolerate property.

The invention provides a three-dimensional magnetic flux permanent magnet linear motor of a multi-air-gap independent winding structure and belongs to the technical field of motors. The three-dimensional magnetic flux permanent magnet linear motor comprises a primary assembly, a secondary assembly and multiple air gaps. The primary assembly comprises n primary units and armature windings, and the primary units are arranged perpendicular to the horizontal direction. An array composed of 2m+1 permanent magnets arrayed in a polarity staggering mode is arranged on each primary unit, the width of each permanent magnet is T/2 (T is polar distance), and two rectangular grooves are formed by annular magnetic permeability iron cores arranged at the two ends of each permanent magnet and the permanent magnet, and the armature windings are arranged in two grooves in the vertical direction and are the same in phase. The secondary assembly is composed of n-1 secondary units, wherein the secondary units and the primary units are arrayed perpendicular to the horizontal direction in a staggered mode, and non-magnetic-permeability grooves or magnetism isolation bridges are arranged periodically arranged on secondary unit iron cores. The non-magnetic-permeability grooves of the adjacent secondary units are staggered by T/2 distance in the horizontal direction. The motor is provided with 2n-2 air gaps. A three-dimensional magnetic circuit is adopted for the motor, high electromagnetic loads can be effectively achieved, and the motor has the advantages of being high in thrust density and reliability.

The invention discloses a bilateral magnetic flux switching permanent magnet linear motor. The linear motor comprises bilateral secondary stators and a primary rotor arranged between the stators, theprimary rotor comprises six primary rotor units, connecting bridges exist between the primary rotor units, each primary rotor unit comprises two H-shaped magnetic conductive iron cores, and a permanent magnet is arranged between the two H-shaped magnetic conductive iron cores; a plurality of secondary teeth are formed on the secondary stators at intervals, secondary grooves are formed between thesecondary teeth, yoke parts are formed at the bottoms of the secondary grooves, magnetic conductive teeth are formed on the H-shaped magnetic conductive iron core opposite to the secondary teeth, andwinding mounting grooves are formed between the magnetic conductive teeth on the same side; the bilateral secondary stators are used as fixed parts, the primary rotor is used as a moving part, and theprimary rotor does linear motion in the middle of the bilateral secondary stators to form a motor with a bilateral flat plate structure. The linear motor has the advantages of the high utilization rate, the low magnetic flux leakage and the like.

The invention relates to a vehicle vibration power generation device with a USB interface. The device adopts a heavy hammer and a double-acting type ratchet wheel as a vibration pickup mechanism, a gear set is a vibration mechanical energy transmission mechanism, a direct current permanent magnet generator is an electromechanical energy conversion mechanism, and an electric energy processing circuit with a USB interface processes irregular direct current electric energy, and supplies power to a vehicle-mounted electronic device. The vehicle vibration power generation device uses the double-acting type ratchet wheel mechanism for vibration pickup, converts rectilinear motion in vehicle running to rotational motion, and drives the low damping permanent magnet direct current generator to work through the efficient gear mechanism, and compared with a common linear type vibration power generation device, the transmission and conversion efficiency of vibration mechanical energy can be significantly improved. The vehicle vibration power generation device with the USB interface generates power by renewable energy, the vibration pickup efficiency, and the energy transmission and conversion efficiency are high, the working life is long, the USB interface is adopted to be suitable for the use of most vehicle-mounted electronic devices, and the universality is strong.

A cylindrical multi-phase linear permanent magnet synchronous motor relates to the motor field. The motor resolves the question that the Taut of a teeth space of an iron core (Taut) is contained and limited with of the Taup of a pole space of a permanent magnet. The motor comprises a primary structure, a secondary structure and an air gap. And the primary structure includes the circular iron core and a winding of an armature embedded in the iron core slot of the armature. The secondary structure includes the circular permanent magnet. The teeth space of the iron core Taut and the pole space of the permanent magnet Taup can meet following correlation requirement: Taup is more than and equal to 0.8 Taut, but less than and equal to 1.2 Taut, and Taut is not equal Taup. The teeth space of the iron core Taut and the pole space of the permanent magnet (Taup) can be selected practically, with small difference therebetween. The invention reduces the positioning force caused by the slot effect, and upgrades the output of pulling force in unit volume. In addition, the motor can be utilized as a linear motor, as well as a linear generator.

The invention discloses a permanent-magnet linear motor based on an arc-shaped and inner-step shaped hybrid structure of a stator. The motor comprises a stator armature primary side and a Halbach permanent-magnet mover secondary side, the stator armature primary side is located on the outer side of the permanent-magnet mover secondary side, the stator armature primary side is formed by a stator iron core and an armature winding, inner-step shaped structures are adopted by the ends of two sides of the stator iron core, and arc-shaped structures are adopted by inner teeth of the stator iron core; the permanent-magnet mover secondary side is formed by a mover iron core and a permanent magnet adhering to the surface the of the iron core, and a Halbach array structure is adopted by the permanent magnet. By means of the motor, air gap magnetic flux larger than a conventional magnet can be obtained, the motor has a better magnetic shielding effect, and the thickness of a magnetic conductive yoke of the mover can be reduced. The invention provides an analysis model of an arc-shaped tooth structure, and the magnitude of magnetic conductance and a magnetic conductance-position variation curve can be derived by means of the model. The optimal structure of the motor is obtained by adopting a Taguchi optimization algorithm.

The invention discloses a transverse magnetic flux magnetic field modulation type linear motor. The transverse magnetic flux magnetic field modulation type linear motor comprises primary stages and secondary stages; the two secondary stages are C-shaped and arranged in a mirror image manner; secondary stage grooves and secondary stage teeth are distributed on three surfaces on the inner side of the C shape in an equally spaced manner; three surfaces of air gaps exist between the primary stages and the secondary stages; each primary stage comprises two same primary stage iron cores and a connecting beam for connecting the two primary stage iron cores; same salient pole teeth in equally spaced distribution are arranged on the upper surfaces, the lower surfaces, and the surfaces, opposite to the connecting beam, of the primary stage iron cores; equidistant virtual teeth are arranged at the ends, close to the air gaps, of the salient pole teeth; the salient pole teeth are wound with armature windings; the adjacent armature windings are connected end to end; the winding direction of the armature windings on the upper surface of the salient pole teeth is opposite to that of the armature windings on the lower surface of the salient pole teeth; the winding direction of the armature windings on the surfaces, opposite to the connecting beam, of the salient pole teeth is the same as that of the armature windings on the lower surface of the salient pole teeth; the armature windings of the salient pole teeth on the three surfaces are connected in series to form one phase of windings; and permanent magnets are arranged at the ends, close to the air gaps, of the salient pole teeth.