531 results about "Magnetic gear" patented technology

A wellbore valve includes a valve operator arranged to move axially along an interior of the wellbore, the valve operator arranged to operate a valve. A valve actuator is disposed proximate the valve operator. The valve actuator is arranged to move from one longitudinal position to another. A linear magnetic gear is coupled at an input element thereof to the valve actuator. The gear is coupled at an output element thereof to the valve operator such that motion of the valve actuator is transferred to the valve operator.

Embodiments of the present invention relate to magnetic gears comprising first and second moveable members arranged to interact in a magnetically geared manner via a first electrical winding arrangement arranged to generate, at least in part, a first magnetic flux having a first number of pole-pairs, and one or more pole-pieces arranged to modulate the first magnetic flux to interact with a second magnetic flux having a second number of pole-pairs, wherein the first number of pole-pairs is less than the second number of pole-pairs.

The invention discloses a substrate transmission mechanism, which comprises an actuating device, a primary transmission gear, a soleplate and two secondary transmission gears, wherein each secondary transmission gear comprises a bearing box, a magnetic transmission shaft, a first helical gear, and a plurality of first permanent magnetic gears and magnetic transmission units which correspond mutually; the bearing box is connected with the soleplate, the magnetic transmission units are parallelly pivoted with the bearing box, and are provided with roller wheels; the first helical gear is fixed on the magnetic transmission shaft, the primary transmission gear is provided with a second helical gear engaged with the first helical gear, and the first helical gear and the second helical gear are axially and mutually vertical; and the first permanent magnetic gears are fixed on the magnetic transmission shaft, the magnetic transmission units are provided with second permanent magnetic gears corresponding to the first permanent magnetic gears, the first permanent magnetic gears and the second permanent magnetic gears are axially and mutually vertical, and the first permanent magnetic gears drive the second permanent magnetic gears through a magnetic field. The substrate transmission mechanism realizes low noise and high cleanness in the process of transmitting substrates, and has simple structure and low production cost.

The invention provides a magnetic field modulating type concentric magnetic gear transmission device in a Halbach magnet structure, which comprises a shell, an outer rotor and an inner rotor, whereinthe outer rotor and the inner rotor are installed in an inner cavity of the shell and are in a cantilever type; the inner rotor comprises an inner rotor iron core and a permanent magnet, which are installed on an output shaft of the inner rotor; the outer rotor comprises an outer rotor iron core and a permanent magnet, which are installed on an output shaft of the outer rotor; a magnetic modulation ring is arranged between the permanent magnet of the inner rotor and the permanent magnet of the outer rotor; and the magnetic modulation ring comprises an iron core block and is fixed on an end plate of the shell. The magnetic gear transmission device comprises two layers of air gaps, wherein an inner-layer air gap is formed between the inner rotor and the magnetic modulation ring, and an outer-layer air gap is formed between the outer rotor and the magnetic modulation ring. The magnet structure uses a Halbach array to replace the conventional radial structure, thereby improving the magnetic density distribution of the air gaps of the magnetic gear transmission device. Because the magnetic density of the air gaps approaches to sinusoidal distribution, the detent torque of the magnetic gear transmission device in the structure is greatly reduced, thereby decreasing the vibration and noise of the magnetic gear transmission device and improving the running efficiency.

The present invention provides a magnetic field modulated magnetic gear, including a casing, an outer rotor and an inner rotor mounted in the casing chamber, the inner rotor is composed of an inner rotor core, 2N1 permanent magnets, and the polarity of the adjacent permanent magnets are different, the inner rotor is mounted on the output shaft of the inner rotor; the outer rotor is composed of a cup type sleeve, an outer rotor core, N2 permanent magnets, and the polarity of all N2 permanent magnets are identical, the cup type outer rotor is mounted on the output shaft of the outer rotor; the magnetic field regulating ring is composed of N1+N2 core blocks and N1+N2 epoxy blocks, the magnetic field regulating ring is fixed on the end plate of the casing; the magnetic gear has two layers air gap, the inner air gap is between the inner rotor and the magnetic field regulating ring, the outer air gap is between the outer rotor and the magnetic field regulating ring. The invention has advantages of high torque transmitted per volume; and the outer rotor adopts a staggered distribution structure of the permanent magnets and the stator core, saving quantity of the permanent magnets, improving the credibility, simplifying the structure, reducing the cost.

A wellbore motor includes a means for converting flow of fluid in the wellbore into rotational energy. A magnetic gear member is operatively coupled at an input thereof to the means for converting. A wellbore rotary tool is coupled to an output of the magnetic gear member.

The invention discloses a concentric magnetic gear using a squirrel cage type magnetic field regulating device and relates to the technical field of engineering machine transmission. The gear is comprised of an internal permanent magnet structure, a middle magnetic filed regulating structure and an external permanent magnet structure, wherein the outside surface of the internal permanent magnet structure is provided with permanent magnets of which the N poles and S poles are arranged closely and alternately, and the number of the magnetic pole pairs is P1; the middle magnetic filed regulating structure is positioned between the internal permanent magnet structure and the external permanent magnet structure, a soft magnetic material is directly processed into to make a squirrel cage type structure or a combined squirrel cage type structure of a magnetic filed regulating block made of a nonconductive material and the soft magnetic material, and the number of cage bars is R; the inside surface of the external permanent magnet structure is provided with permanent magnets of which the N poles and S poles are arranged closely and alternately, and the number of the magnetic pole pairs is P2; and R is equal to the sum of the P1 and the P2. When the internal permanent magnet structure rotates, a rotary magnetic filed in which the number of the magnetic pole pairs is P1 is generated, the middle magnetic filed regulating structure modulates the rotary magnetic field into a rotary magnetic field in which the number of the magnetic pole pairs is P2, the rotation speed and direction of the rotary magnetic field in which the number of the magnetic pole pairs is P1 are changed at the same time to drive the external permanent magnet structure to rotate, and thus, the aim of changing the rotation speed is realized.

An electromagnetic, continuously variable transmission power split turbo compound includes a turbo compound turbine driven by exhaust gases from an internal combustion engine, and a power split device comprising a magnetic gear arrangement. The magnetic gear arrangement includes a high speed rotor comprising a first quantity of permanent magnets, a low speed rotor comprising a second quantity of permanent magnets, and a plural pole rotor between the high speed rotor and the low speed rotor. A first rotor of the high speed rotor, the low speed rotor, and the plural pole rotor includes a mechanical input drive adapted to be driven by the turbine. A second rotor of the high speed rotor, the low speed rotor, and the plural pole rotor includes a mechanical output drive. A third rotor of the high speed rotor, the low speed rotor, and the plural pole rotor is unconnected to a mechanical drive and includes a controlling rotor for controlling a ratio of input drive angular velocity to output drive angular velocity.

The invention discloses a magnetic gear composite motor. The magnetic gear composite motor comprises an outer stator, a modulation rotor and an inner rotor which are sequentially arranged in a concentrically nested manner from outside to inside, wherein air gaps are formed between the outer stator and the modulation rotor as well as between the modulation rotor and the inner rotor respectively; the outer stator is provided with a trapezoidal groove used for placing a fractional slot winding, and the groove opening is embedded with alternative-pole magnetic steel; the modulation rotor comprisesa plurality of magnet regulating yokes and a plurality of non-magnetic conductive materials embedded with punched holes respectively, and the adjacent magnet regulating yokes are embedded with the punched non-magnetic conductive materials therebetween; and the permanent magnet inner rotor comprises inner rotor permanent magnets and an inner rotor iron core which are concentrically nested to one another sequentially from outside to inside. According to the magnetic gear composite motor provided by the invention, a magnetic path of the magnetic gear motor on the stator is constructed through combining permanent magnets with different polarization directions, so that the magnetic path is enabled to be more efficient and reasonable, the flux leakage is reduced while low-speed and high-torquedirect drive output is realized, and the overall torque density and efficiency of the composite motor are improved.

A multiple-rotation absolute-value encoder of a geared motor, wherein the geared motor (10) reduces the rotational speed of a motor shaft (12) and takes it out from a gear shaft (14) to drive a machine device (15) in an operating range corresponding to the two rotations of the gear shaft (14). The multiple-rotation absolute-value encoder (20) fitted to the geared motor (10) comprises a gear shaft absolute value encoder (30) detecting the absolute position of the gear shaft (14) and a load side absolute value encoder (50) having a two-pole magnet (51) and a magnetic sensor (52) rotating at a rotational speed reduced to half the rotational speed of the gear shaft (14) through the magnetic gear (40). Since the operating range of the machine device (15) corresponds to one rotation of the two-pole magnet (51), the absolute position of the machine device (15) is determined based on an output from the magnetic sensor (52). As a result, the original position of the machine device (15) can be established without requiring an additional rotating operation when the operation of the machine device is started.

A wellbore motor includes a source of rotational motive power disposed in a wellbore, a magnetic gear member operatively coupled at an input thereof to the source; and a magnetic gear member output coupled rotationally to a rotary wellbore tool.

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 magnetic-field modulated-type magnetic screw, belongs to the magnetic screw and linear magnetic gear field and relates to a contactless magnetic transmission linear driver. A rotor magnetic screw is formed by a radial magnetizing spiral permanent magnet and an electric iron bar. A linear mover is formed by a spiral electrician iron hoop and a non-magnetic material. A stator magnetic nut is formed by the radial magnetizing spiral permanent magnet and an electrician iron hoop. In the rotor magnetic screw, a permanent magnet surface is pasted to an external surface of the electric iron bar. In the stator magnetic nut, the permanent magnet surface is pasted to an internal surface of the electrician iron hoop. The linear mover is between the magnetic screw and the magnetic nut, and the three components are not contacted with each other and air gaps are arranged among the three components. Through mutual cooperation between the permanent magnet and a ferromagnetic material, an amount of the permanent magnets can be effectively reduced and simultaneously a linear stroke is added, and a thrust density and mechanical strength are increased.

A magnetic gear arrangement includes: a first gear member for generating a first magnetic field, a second gear member for generating a second magnetic field, and a coupling device which provides an arrangement of interpoles between the first gear member and the second gear member. The interpoles couple the first and second magnetic fields to produce a gearing between the first and second gear members. The first gear member has superconducting magnets or coils for generating the first magnetic field and/or the second gear member has superconducting magnets or coils for generating the second magnetic field.

An apparatus having at least one rotatable driven object having an edge on which are disposed a series of adjacent magnets of alternating polarity and a driving object rotatable by an external motor torque and having a series of adjacent magnets of alternating polarity on a magnet supporting surface. The magnet supporting surface of the driving object is rotatable through a common region approximately centered about the point of closest approach to the magnet supporting edge of the driven object for sequentially placing magnets of the driving object in the region enveloping the effective interactive range between the two objects. The fields of magnets of opposite polarity of the driving object interact with the fields of the magnets on the driving object to effect rotation of the driven object. Disclosed are structures for torque limiting wheels, magnetic gear trains, reduction gears and ball joints, and propulsion systems for watercraft and aircraft.

A multirotation type encoder of the invention includes a first encoder 20 attached to a rotating shaft 11 of a rotating machine 10 for detecting an absolute value rotational angle within one rotation, and a second encoder for counting a multirotation amount of the rotating shaft 11 by using a speed reducing mechanism 30 by magnetic coupling and the second encoder 40 is constituted by a first magnetic gear 31 directly connected to the rotating shaft and magnetized in multiple poles and at least one second magnetic gear 32 arranged to be opposed thereto in noncontact and magnetized in multiple poles by a number of magnetic poles larger than that of the first magnetic gear 31 and is constituted to count a multirotation amount by detecting a rotational angle of the second magnetic gear by the second encoder.

Disclosed is a little pole difference magnetic field coupling type magnetism transmission eccentricity gear pair of a novel radial direction magnetic field. The little pole difference magnetic field coupling type magnetism transmission eccentricity gear pair of the novel radial direction magnetic field can be applied widely in the field of industry transmissions of wind power generation, electric automobile, vessel driving and the like. The little pole difference magnetic field coupling type magnetism transmission eccentricity gear pair of the novel radial direction magnetic field is characterized in that a stator with a 2p1 stator permanent magnet 1 are distributed in the inner hole of a machine shell 6. A magnetism transmission gear pairs are formed by planet rotors of 2p2 planet rotor permanent magnet 2 are distributed on the excircle of a planet rotor iron core5. A number difference between the pole number 2p1 and 1p2 is small. The permanent magnets on the two magnetic gear pairs penetrate through an air gap magnetic field coupling of the radial direction eccentricity, and are connected to an eccentricity structure by the little pole difference two magnetic gear pairs. A second bearing 12 and a third bearing 13 are installed on an eccentricity input shaft 3. The planet rotor iron core 5 is driven by the eccentricity input shaft 3 to revolve in autogiration around the axis. A low speed autogiration of the planet rotor is output through a pin hole type output structure.

Provided is a dual mechanical port magnetic conductance harmonic type electromagnetic gear composite permanent magnet motor which can be widely applied to industrial transmission fields such as wind power generation, electric automobiles, ship driving and server driving. The electromagnetic gear composite permanent magnet motor is characterized is that main transmission components of the electromagnetic gear composite permanent magnet motor consists of a stator formed of a stator iron core (9) and a stator winding (8) having 2ps poles, a permanent rotor formed of a rotor iron core (17) equipped with 2pr rotor permanent magnets (18) and an output shaft (16), and a salient pole magnetic conductance wave rotor (6) having Zb salient poles, wherein a numerical difference between the number of pole-pairs ps and pr is relatively small; and the stator, the permanent magnet rotor and the salient pole magnetic conductance wave rotor (6) are coaxially disposed, are mutually coupled through a radial air-gap magnetic field, and are mutually coupled in a salient pole straight axis area of the high-speed rotating salient pole magnetic conductance wave rotor (6) by using a principle of heteropolarity magnetic field attraction with a small pole difference so as to drive the permanent magnet rotor with a small pole difference to rotate at a low speed. Therefore, power speed changed and torque conversion controlled drive with no mechanical contact and no friction is realized.

The invention discloses a double-stator permanent magnet brushless doubly-fed wind generator. An outer stator (2) and an inner rotor (4) are arranged on the outer circumference and the inner circumference of an outer rotor (3) respectively, and an inner stator (5) is arranged on the inner circumference of the inner rotor (4); the outer rotor (3) and the inner rotor (4) are coaxial and can freely rotate; the outer stator (2) is provided with a p-antipode power winding (21) and is connected with a power grid directly; the inner stator (5) is provided with a q-antipode control winding (51) and is connected with the power grid through an AC-DC-AC power converter; the inner surface and the outer surface of the outer rotor (3) are each provided with p pairs of permanent magnets (31); the inner rotor (4) is a magnetism modulation ring provided with p+q magnetic conductive blocks, magnetic fields generated by the permanent magnets (31) are modulated by the inner rotor (4), and then excitation magnetic fields can be provided for the control winding (51). The permanent magnet excitation is adopted in the double-stator permanent magnet brushless doubly-fed wind generator, so the power density of the doubly-fed wind generator is improved; magnetic gears are additionally arranged and a mechanical step-up gear box is eliminated, and therefore reliability is improved; relatively smaller harmonic magnetic fields of the permanent magnets are used for excitation for the small-power control winding.

The invention provides a new magnetic gear and a magnetic transmission device based on the magnetic gear, which are used for solving the problem of higher cost of the existing magnetic gear without lowering the torque density of the magnetic gear. For the magnetic gear, permanent magnets of the inner and outer rotors of the magnetic gear are separated by a magnetic material and are tangentially magnetized, and the supporting parts of the inner and outer rotors are made from a non-magnetic material. In the invention, as magnetic fields are converged to be enhanced at opposite sides of two groups of permanent magnets, the number of the permanent magnets is reduced by one half and the cost of the magnetic gear is lowered by one quarter in the case of equal torque density, and meanwhile the magnetic transmission device can obtain relatively higher torque density as well as a large transmission ratio by virtue of cycloidal motion between the first group of permanent magnets and the second group of permanent magnets.