389 results about "Permanent magnet linear motor" patented technology

The invention discloses a fault-tolerance permanent magnet linear motor, which is applied to the field of linear driving with high reliability and high efficiency. The fault-tolerance permanent magnet linear motor comprises a stator, a mover and armature windings, wherein the length of the mover is smaller than that of the stator, a plurality of armature teeth are uniformly distributed on the stator at intervals, the armature windings are wound on the armature teeth, a set of armature windings is arranged in a tooth groove of each armature tooth, an insulation tooth is arranged between every two adjacent armature teeth, permanent magnets are pasted and arranged on the end parts of the armature teeth, the height of the insulation teeth is larger than that of the armature teeth pasted and provided with the permanent magnets, and the mover is in a projected electrode shape formed by a mover iron core and a plurality of mover teeth. The invention has the advantages of simple structure, high power density and high reliability, and is favorable for reducing the tooth groove force of the motor. Physical isolation, heat isolation and magnetic circuit decoupling exist between phases of the motor, the permanent magnets are favorable for heat dissipation, and the motor has strong fault operation and fault-tolerance performance.

The invention discloses an unposition sensor for a permanent magnet linear motor. Before a motor starts, a designated trigger signal is inputted into an inverter, a corresponding line inductance value is solved, the calculation is realized by combining the existing inductive parameters of the motor for preliminarily obtaining an initial position of a linear servo motor and then high-frequency voltage is immediately introduced to judge the direction of a magnetic pole of the rotor; after the motor starts, the position of the rotor is detected at the low-speed phase in real time by a method of combining the injection of the high-frequency voltage with the repetition of a controller; position information of the rotor is acquired at the middle-high speed phases in real time by a method of combining a sliding-mode observer based on an extended counter electromotive force model with a saturation function algorithm. According to the unposition sensor disclosed by the invention, an initial position detection method, a rotating high-frequency injection method, repeated control and the sliding-mode observer are combined together, so that the position information of the linear servo motor can be accurately and effectively detected, the defects caused by the existence of a mechanical sensor are overcome and the reliability of the system is improved.

This invention relates to a lateral flux flat permanent magnet linear motor, in which, E-type outer bottom surfaces of multiple E-type cores are arrayed on a side panel of a bottom board side by side in gaps, windings are inlaid in the grooves of the multiple E-type cores, end surfaces of three claws of all E-cores of the first primary have gaps with end surface of one side of a secondary, and magnet blocks are set on a side end face of the secondary and opposite to the three claw surfaces of each E-type magnet-conduction block in the first primary or three claw surfaces of each magnet-isolating block separately. The moving direction of runners in this invention is vertical to the plane the master magnetic flux places at and the manufacture of iron core punch plates is simple compared with traditional magnet linear motors.

The invention provides a complementary type modularization permanent-magnetism linear motor and a motor die set formed by the same. The permanent-magnetism linear motor comprises a stator and a runner. The stator and the runner are both in a salient pole structure, and an air gap exists between the stator and the runner. The runner comprises 2m E-type modules, wherein m is the phase number of the motor. A non-magnetic material is filled between the two adjacent E-type modules. Each E-type module comprises 2 U-type magnetic teeth and a permanent magnet arranged between the U-type magnetic teeth, wherein concentrated windings are arranged in the grooves of the E-type modules and sleeve the permanent magnets. The relative displacement between the two in-phase E-type modules is lambda 1=(n+/-1/2) Tau s, the relative displacement between the two out-of-phase E type modules is lambda 2=(j+/-1/m) Tau s, Tau s is the polar distance of the stator, and n and j are both positive integers. Each phase of windings of the motor has symmetrical complementarity, and the counter potential of the motor has symmetrical waveform and is a sine. Moreover, the complementarity of the structure is greatly lowered, and even the positioning force of the motor is counteracted.

The invention discloses a planar transverse magnetic flux switch flux linkage permanent magnet linear motor, which has the characteristics of short rotor and long stator. A permanent magnet and an armature winding of the linear motor are both arranged on a moving short armature part; the moving direction of the rotor is vertical to the plane of a main magnetic flux; and the stator part is only provided with an iron core with a tooth socket, and the using amount of the permanent magnet is small and the cost is low. The linear motor directly drives a load to run, and has a modularized structure, low using amount of the permanent magnet, low cost and high thrust density; and due to the characteristics of low cost and high performance, the linear motor is suitable for various types of industrial and civil long stroke linear motion occasions, particularly machine tools, semiconductor processing equipment and logistics transmission lines.

The invention discloses a direct drive type hoist with a boosting caliper brake. The hoist comprises a vertical shaft, a cage, a cage rack, the boosting caliper brake, a safety gear and a positioning mechanism, wherein a fixed beam is arranged on an inner wall mounting base of the vertical shaft; a hoisting permanent magnet linear motor is arranged between the fixed beam and the cage rack; the boosting caliper brake is arranged on the cage rack or the cage; and a brake boosting mechanism and a drive boosting mechanism are arranged on the brake. Compared with those of the conventional identical or similar brakes, the specification, dimension and weight of a push mechanism such as springs are greatly reduced, the braking force and the driving force are increased by one to two orders of magnitude compared with those of common boost-free brakes, and the cage accurately and reliably brakes. The positioning mechanism is arranged between the inner wall of the shaft and the cage. By adopting the scheme of the positioning mechanism and the hoisting linear motor with a slender structure, the variation of a working air gap of the motor is controlled within an engineering allowed band, normal attraction force in unit length is greatly reduced, stress concentration is avoided, and the cage stably operates.

The invention discloses a power-driven translation door driving device based on a permanent magnet linear motor. The device comprises the permanent magnet linear motor, a door hanging plate and a rolling guide rail mechanism. The permanent magnet linear motor comprises a motor stator and a motor rotor, the rolling guide rail mechanism comprises a guide rail and rolling wheels. The motor stator comprises a stator core and a stator winding. The motor rotor comprises a rotor core and a set of magnetic steel with the same structure and size, air gaps are formed between the motor stator and the motor rotor, the door hanging plate is fixedly connected with the motor rotor, the rolling wheels are arranged on the motor rotor, the guide rail is arranged on the motor stator, and the motor stator position is fixed; a hall sensor is arranged on the tooth groove position of the stator core. By means of the power-driven translation door driving device, a transmission mechanism in the power-driven translation door driving device of a rotating motor is omitted, and thus noise is reduced, stability is improved, service life is prolonged, and the device is simple in structure and easy to control.

The invention discloses a one-phase open-circuit fault-tolerant direct thrust control method for a five-phase permanent magnet linear motor. Firstly, a Clark transform matrix and an inverse matrix thereof are derived based on fault-tolerant phase current. On the above basis, a stator flux linkage on alpha-beta is derived, a stator virtual flux linkage is defined according to the requirements of acircular stator flux linkage trajectory, and thus the voltage compensation on alpha-beta is derived. The stator actual voltage on the alpha-beta is derived by a modulation function of a voltage sourceinverter, and voltage is combined with voltage compensation and stator current, and a stator virtual flux linkage and thrust are observed by a stator flux observer and a thrust observer. Then statorvirtual target votlage is calculated according to given thrust, a given stator flux linkage amplitude and the observed stator virtual flux linkage and thrust. Finally, the stator actual voltage is calculated by the voltage and the voltage compensation, and the motor is controlled by the voltage by the voltage source inverter. According to the method, a thrust fluctuation caused by a motor failureis suppressed, and more importantly, the dynamic performance and steady state performance are consistent with that in a normal condition.

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 multi-mode electromagnetic energy-regenerative vehicle active suspension actuator. The multi-mode electromagnetic energy-regenerative vehicle active suspension actuator comprises an actuator main body and an actuator controller, wherein the actuator main body comprises a piston cylinder, a permanent magnet linear motor module, an adjustable damping vibration absorber module, an actuator upper end cover and a lower lifting lug. The permanent magnet linear motor module comprises a secondary piston rod, a linear motor upper end cover, a linear motor lower end cover, a plurality of silicon steel sheets, a plurality of primary coils and a permanent magnet; the adjustable damping vibration absorber module comprises a vibration absorber piston rod, a sleeve, an upper lifting lug, a sealing separation plate, a big piston, a small piston, a damping liquid passage and a proportional electromagnetic valve; and an input end of the actuator controller is connected with an acceleration sensor, a sprung mass speed sensor and an unsprung mass speed sensor. The invention further discloses a control method for the multi-mode electromagnetic energy-regenerative vehicle active suspension actuator. The invention is advantaged in that the energy-regenerative efficiency of the multi-mode electromagnetic energy-regenerative vehicle active suspension actuator is high, the service life of a vehicle-mounted storage battery can be effectively prolonged and an active suspension is in an optimal vibration absorbing state.

A high-efficiency permanent magnet linear motor optimized for low speed, high thrust applications, and a direct-drive oil well lift device powered by the motor. The motor comprises a high ratio of conductor volume to core cross-section area (14) and a plurality of individual, rectangular core-winding units (22) with a straight flux path through the cores (10) of the winding units.

The invention discloses a liner motor arranging method for a cordless elevator. Two U-shaped liner motors with bilateral structures are used as drive sources of an elevator and arranged at one side or two sides of a car to form a cordless elevator in a knapsack type or balance type structure. An included angle between the axes of the two U-shaped liner motors can be any angle between 0 degree and 360 degrees, and upper and lower air gaps of the U-shaped liner motors have the formula that g1 is smaller than or equal to g2. By adopting the motor arranging method provided by the invention, the double U-shaped permanent magnet liner motors inhibit normal attraction borne by the moving part of the elevator, reduce the mechanical strength of an installation base, a car and a positioning and braking device of the cordless elevator and the weight of the moving part of the elevator and increase effective loads. In addition, a smaller part of unbalanced normal attraction can be retained, the problem of side inclination of the knapsack type car can be effectively solved, and the stability of the air gaps in the running process of the motors can be kept.

The invention proposes a fault-tolerant field-oriented control method of five-phase interior permanent-magnet fault-tolerant linear motor (IPM-FTLM) with two nonadjacent short-circuit phase faults. Firstly, the extended Clark transformation matrix can be obtained according to the principle that magnetic motive force (MMF) keeps constant before and after the two-phase open-circuit faults, the constraint that the sum of healthy phase currents is zero and the adjacent two-phase current amplitude is equal. The back electric motive force (EMF) can be estimated by the transposed matrix. The nonlinear strong coupling system becomes the first-order inertia system when using the internal mode controller, the first-order inertia feed-forward voltage compensator and back-EMF observer, as the motor is with fault. Then, according to the principle that the sum of MMF of the healthy phase short-circuit compensation currents and two phases short-circuit fault currents is zero, the short-circuit compensation voltage can be obtained, and then these voltages add vector-controller output voltages, respectively. The invention not only restrains the thrust force fluctuation caused by two nonadjacent short-circuit phase faults, but also more importantly keeps the same dynamic and steady performance as the normal conditions, and also it has the constant switching frequency of voltage source inverter.

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 cylindrical permanent magnet linear motor with high thrust density, belonging to the technical field of motors and solving the problems of low thrust density and poor overload capability of traditional cylindrical motors. The primary of the cylindrical permanent magnet linear motor with high thrust density comprises an armature iron core and an armature winding, wherein the armature iron core is radially provided with a first channel, the central line of the first channel is parallel to the axial direction of the motor, the armature winding is assembled on the inner wall of the armature iron core and comprises a plurality of cake-shaped windings which are arranged in a cylinder shape according to a phase sequence, the wiring terminals of the cake-shaped windings respectively penetrate through the first channel and are connected, and an air gap is formed between the inner circumferential surface and the secondary outer surface of the armature winding. A plurality of secondary iron cores and a plurality of permanent magnets are mutually separated and sleeved in match on the outer circumferential surface of a non-magnetic beam barrel, two secondary iron cores are respectively sleeved at two end parts on the outer circumferential surface of the non-magnetic beam barrel, the axial cross section of each permanent magnet is an isosceles trapezoid, each permanent magnet is in an axial magnetism-charging structure, and the adjacent permanent magnets have opposite magnetism-charging directions. The invention is used as a linear motor.

The invention discloses a module-complementary-type flux-switching permanent magnet linear motor which comprises a primary part and a secondary part. The primary part and the secondary part are of convex electrode structures. An air gap is reserved between the primary part and the secondary part. The primary part comprises primary iron cores, permanent magnets, non-magnetic blocks and armature windings. Magnetic teeth are formed by the primary iron cores. A T-type unit is formed by each permanent magnet and the magnetic teeth on the two sides of the permanent magnet. The primary part comprises N*m T-type units, wherein the N is the number of coils in the windings of each phase, and the m is the number of the phases of the motor. A module is formed by i T-type units. The module-complementary-type flux-switching permanent magnet linear motor has the symmetrical complementarity, the manufacturing difficulty is lowered, waveforms of flux linkages and waveforms of counter electromotive force of the motor are symmetrical and are in sine shapes, fluctuation of push force is remarkably reduced, and the module-complementary-type flux-switching permanent magnet linear motor is particularly suitable for linear driving occasions such as urban rail traffic systems, factory transport transmission devices and elevators.

The invention relates to a modularization flat plate type multiphase permanent magnet linear motor based on single and double layer compound windings, and belongs to the field of permanent magnet motors. The modularization flat plate type multiphase permanent magnet linear motor aims at solving the problems that when faults like a winding short circuit occur in a conventional multiphase permanent magnet linear motor, the fault isolation difficulty is large; as the interphase electromagnetic coupling degree is high, the motor modularization design difficulty is large. The modularization flat plate type multiphase permanent magnet linear motor comprises stators and a permanent magnet rotor, the stators are arranged on one side or two sides of the permanent magnet rotor, and a gap is reserved between the stators and the permanent magnet rotor; each stator is formed by assembling a plurality of same stator modules which are assembled into a flat plate shape in the axial direction; each stator module comprises a stator core, 2n armature teeth, two fault-tolerant teeth and 2n concentrated windings; the permanent magnet rotor is formed by assembling a permanent magnet and a rotor core, and can be of a pasting structure or an Halbach structure or a tangential structure and the like.

The invention discloses a permanent magnet linear motor position sensorless control method based on a novel disturbance observer. With a voltage equation under the stationary coordinate system of a permanent magnet linear motor adopted as a reconstruction objective, the novel disturbance observer is designed, the input of the disturbance observer is voltages ualpha and ubeta and current ialpha and ibeta under the stationary coordinate system; the output of the disturbance observer is counter electromotive force estimated values under the stationary coordinate system which are represented by symbols described in the descriptions of the invention; the counter electromotive force estimated values are fed into a phase-locked loop structure, and then, position and velocity information can be obtained. The novel disturbance observer high anti-interference ability; and when high-frequency and low-frequency interference exists, position and velocity information can be estimated accurately. According to the position sensorless control method based on the novel disturbance observer, signal injection is not required, and the use of a filter can be avoided, and therefore, high precision and response speed can be realized, and the stable position sensorless operation of the permanent magnet linear motor can be ensured.

The built-in permanent magnetic linear motor comprises: a primary iron core (1) and coiling (2) opposite to (4), a secondary Halbach permanent magnet (3) opposite to (1) and iron core (4), and the pole shoes (5) on (3) to hold some gap with (1), wherein the magnetizing direction for (3) is clockwise and rotated every 90deg. This invention releases load of compensation system, and has wide application.

The invention discloses a balancing vehicle system and a control method thereof. According to a difference equation model and a drift error model of attitude signals of the balancing vehicle system, astate equation of an extended Kalman filter and a mathematical model of a permanent magnet linear motor are established. A second-order dynamic Terminal sliding film is used to drive permanent magnetsynchronous motor. Particle Swarm Optimization (PSO) is used to optimize the parameters of tracking controller, synchronization controller, clearance elimination controller and switching function ina two-motor system. The invention realizes that the signal collected by the sensor of the balancing vehicle has large noise and zero drift error, and solves the problem of poor robustness and the problem that the Brush motor structure is complex, fault, maintenance workload, short life, commutation spark easy to produce electromagnetic interference, as well as in the balance of the car in the process of running jitter, deviation is too large, and low security.

The invention discloses a cylindrical permanent-magnet linear motor with modular C-shaped stator cores, which is used in a small linear propulsion system. An inner stator ring is composed of armature windings, a magnetic barrier and two C-shaped cores, wherein the magnetic barrier is made of a non-magnetic material; the two C-shaped cores are made of a magnetic material and are the same in structure; the magnetic barrier is fixedly sandwiched between the two C-shaped cores; the two C-shaped cores are arranged in the axial direction; the distance between each C-shaped core and an outer rotor ring is the same; each C-shaped core is provided with a C-shaped groove; the opening of the C-shaped groove faces the outer rotor ring; one armature winding is embedded in each C-shaped groove; the axial length of the two C-shaped cores is one rotor polar pitch; and the axial width of the magnetic barrier is 1/4 of one rotor polar pitch. Thus, the two modular C-shaped core structures and a rotor generate positioning forces which are opposite in phase, thus realizing the counteraction of the positioning forces; the winds of the two phases achieve a physical circuit isolation effect and a temperature isolation effect, thereby being capable of realizing operation even in the case of a failure; and the magnetic barrier physically isolates the two modular C-shaped cores and decouples the magnetic circuit, thereby improving the operation fault tolerance of the motor.

The invention discloses an underwater vehicle induction charging system based on sea wave-luminous energy hybrid generation. The system comprises an ocean surface floating module, a sea wave generation module, a luminous energy generation module, an energy storage module and an underwater non-contact charging module, wherein the sea wave generation module converts wave energy into electric energy through a permanent magnet linear motor to be output; the luminous energy generation module converts the solar energy into electric energy through a photoelectric reaction to be output; the energy storage module rectifies alternating current output by the sea wave generation module and the luminous energy generation module into direct current and stores the direct current in a storage battery; the underwater non-contact charging module inverts the direct current in the storage battery into high-frequency alternating current, and induction charging is performed on a lithium battery on an underwater vehicle through electromagnetic induction. Wave direct-driven generation, floating type photovoltaic generation and underwater non-contact induction charging are combined together, the reliability and stability of a power supply system are effectively improved, defects of the underwater vehicle in endurance and charging are effectively overcome, the underwater vehicle induction charging system is energy-saving and environment-friendly, and the power generation cost is reduced.

The invention discloses a direct-driven wave power generation device which comprises a buoy mechanism, a permanent magnet linear motor mechanism and a piston mechanism, wherein the buoy mechanism comprises a dynamic buoy and a stationary buoy; the dynamic buoy is arranged outside the stationary buoy in a sleeving manner; a support frame is fixed at the upper end of the dynamic buoy; the permanent magnet linear motor mechanism comprises a stator and a rotor; the rotor is arranged in the stator; the piston mechanism comprises a cylinder, a piston ring and an output shaft; the piston ring is mounted in the cylinder; the interior of the cylinder is divided into an upper cavity and a lower cavity; one end of the output shaft is fixed with the piston ring; the other end of the output shaft is fixed with the support frame; the lower cavity is communicated with an upper port in the stator in a sealed manner; a lower port of the stator is communicated with the upper cavity through a high-pressure pipeline in a sealed manner. The direct-driven wave power generation device, provided by the invention, is simple in structure and has the capability of resisting the storm at sea, and optimal capture of wave energy can be realized, so that the wave power generation efficiency is improved. The scale of the wave power generation device is variable, and wide application and popularization are facilitated.

The invention discloses a bilateral magnetic flux switching permanent magnet linear motor which comprises secondary cores, primary cores, primary coils and a permanent magnet. The primary cores are vertically arranged; the secondary cores are located on the left and right sides of the primary cores; the primary coils are wound in the primary cores; and the permanent magnet is located between two adjacent primary cores. Due to the bilateral structure of the bilateral magnetic flux switching permanent magnet linear motor disclosed by the invention, the normal attractive force formed between the primary cores and the secondary cores can be canceled out, and the air gap fluctuation produced by excessive attractive force is weakened, thus the performance of electromagnetic thrust and the operation stability of the motor are improved, and the motor provided by the invention is suitable for the long-distance linear motion; and moreover, the bilateral structure has small gaps in which impurities such as scrap iron cannot fall easily, and the motor maintenance cost is reduced.

A system for pumping fluid (e.g., but not limited to, drilling fluid), the system having pump apparatus with a pumping section and a motor section, the pumping section having an inlet and an outlet, the motor section having a shaft for reciprocating in and out of the pumping section to alternately suck fluid into the inlet and pump fluid out the outlet, and the motor being a permanent magnet linear motor for moving the shaft in a reciprocating motion, e.g., but not limited to, vertically or horizontally; and methods for using such a system.