19 results about "Pole number" patented technology

The application discloses a rotary compressor and a refrigeration equipment, the rotary compressor comprises a shell, a motor and a compression mechanism, the motor and the compression mechanism are arranged in the shell, the motor comprises a stator and a rotor, the compression mechanism comprises a crankshaft, the crankshaft is connected with the rotor, the rotary compressor satisfies 5<=GCD(Q,P)<=6; wherein, Q is the slot number of the stator, P is the pole number of the rotor, D2 is the inner diameter of the stator, D1 is the outer diameter of the stator, T1 is the thickness of the stator core of the stator, and d is the diameter of the crankshaft. The rotary compressor provided by the application adopts reasonable ratio settings for the slot number Q of the stator, the pole number P of the rotor, the outer diameter D1 of the stator, the inner diameter D2 of the stator, the thickness T1 of the stator core and the diameter d of the crankshaft, thereby improving the operation stability and energy efficiency of the rotary compressor.

The utility model discloses a low -speed many pole number permanent magnet machine rotor structure relates to permanent magnet machine technical field, aims at solving the technical problem that permanent magnet bottom does the isolation magnetic processing and can cause rotor structure complex and reliability reduces. Its technical scheme main points are: including rotor support, be provided with rotor iron core on the rotor support, the both ends of rotor iron core are provided with first rotor end plate and second rotor end plate respectively, are set up with a plurality of punching piece grooves on rotor iron core, and punching piece groove is through in rotor iron core, and three permanent magnets are all provided in punching piece groove, three permanent magnets adopt three -segment type "U" type structure, and the top of "U" type structure all is provided with two isolation magnetic bridge, is set up with a plurality of pressing plate groove on first rotor end plate, and pressing plate groove all is provided with pressing plate, and the pressing plate cover is established in "U" type structure. The utility model discloses purposes at providing a kind of low -speed many pole number permanent magnet machine rotor structure.

A flux concentrate type motor includes a rotor core including an inner diameter portion core, a plurality of outer diameter portion cores, and a plurality of bridges connecting the plurality of outer diameter portion cores to the inner diameter portion core; and a plurality of arc type permanent magnets each inserted between two adjacent outer diameter portion cores. A first angle θ1 formed between a first extension line connecting a center of the arc type permanent magnet and a center of the inner diameter portion core and a second extension line connecting a center of an outer arc of the outer diameter portion core and the center of the inner diameter portion core may satisfy: θ1=k1×PA (k1 is 0.16 to 0.55, and PA=360° / (2×P(a number of pole of the permanent magnet)), where the first angle θ1 may be between 4° and 10°.

By appropriately setting the circumferential angle of the region from the start point to the end point of the ribs formed on the motor housing, both axial and circumferential vibrations of the electric motor are reduced. [Solution] An electric compressor is provided comprising a motor housing 10 and a motor, wherein the motor has a stator fixed inside the motor housing and a rotor positioned on the inner circumference side of the stator, and a rib 10b is formed on the outer circumferential surface 10a of the motor housing 10 so as to extend in a direction inclined at a predetermined angle α from the direction along the axis X and to pivot in the circumferential direction CD about the axis X, and when the angle θ is the angle obtained by dividing 360 degrees of one rotation of the circumferential direction CD by the greatest common divisor of the number of slots of the stator and the number of poles of the rotor, the angle φ of the circumferential direction CD in the region from the starting point 10b1 to the ending point 10b2 of the rib 10b is set to be greater than 0.5θ and less than 1.5θ.

A rotor (1) of an electric machine, with a rotor carrier (3), a rotor body (4) disposed on the rotor carrier (3) and a rotor sleeve (5) enclosing the rotor body (4), wherein the rotor body (4) comprises an internal passage (6) for inserting the rotor carrier (3) and a plurality of rotor poles (7), wherein at least one of the rotor poles (7) comprises a magnetic layer (8) of a plurality of magnets (9), wherein the respective rotor pole (7) is divided by the magnetic layer (8) in the radial direction into an inner pole segment (10) and an outer pole segment (11), wherein a magnetic pocket (12) is formed in each of the respective rotor poles (7) between the outer pole segment (11) and the inner pole segment (10), which is provided for receiving the magnets (9) of the magnetic layer (8) and comprises a central area (12.1), which is designed without bridges, wherein each respective magnetic pocket (12) comprises two pocket legs (12.2), wherein an axial cooling channel (15) is provided at each of the pole edges (7.2) of the rotor poles (7), which is arranged between two pocket legs (12.2) of two adjacent magnetic pockets (12), wherein the rotor body (4) radially within the cooling channels (15) has a hub portion (4.2), wherein the rotor sleeve (5) is pre-tensioned, characterized in that the hub section (4.2) comprises a plurality of radial breaker slots (16) along its extension in the circumferential direction, each opening into one of the cooling channels (15), and that the pre-tensioning of the rotor sleeve (5) is generated or increased by a radially outward acting tension of the inner pole segments (10) against the rotor sleeve (5).

This application provides a stator for a 6-pole flat wire motor, with 3 winding slots per phase per pole. The number of layers formed by the flat wire winding in the winding slots is an odd number of not less than 3. Each phase winding includes 2 branches, each branch including one I-shaped sub-conductor and multiple U-shaped sub-conductors. The number of series turns in each branch is a fraction, allowing the three-phase output terminals and the neutral point bus terminal of the flat wire winding to be located at opposite ends of the axial direction. This facilitates the design and installation of the output busbars and busbars, reduces the manufacturing difficulty and cost of the output busbars and busbars, avoids interference between the output busbars and busbars, reduces the manufacturing difficulty of the stator, and helps to reduce the stator's height and size, thus helping to ensure the motor's torque and power density. The stator structure is simple, containing fewer types of sub-conductors, and the winding operation is simple, which helps to reduce production costs. The flat wire motor has a smaller turn jump range, which can avoid the motor overheating problem caused by interphase circulating current.

The application discloses a rotor structure of a permanent magnet motor with adjustable pole number, belongs to the field of permanent magnet motors, and realizes the function that the pole number can be adjusted in the same motor.The application comprises a rotor body, permanent magnets and a rotating fixed permanent magnet part.The rotating fixed permanent magnet fixes the permanent magnets through a clamping mode, and after the combination, the three are placed into the reserved holes of the rotor body to form a complete rotor structure.Through a mechanical adjustment method, the permanent magnets can rotate in the rotor, different motor pole number adjustment is realized on the existing motor, the cost of motor design and manufacturing is remarkably reduced, the functional purpose of the motor is increased, the effect of reducing the eddy current loss of the permanent magnet is remarkable, and the influence on the motor output torque is small.The application is suitable for application occasions that the pole number of the permanent magnet of the permanent magnet motor is rapidly changed.

This invention provides a stator for a flat-wire motor. The stator has 3 slots per pole per phase, with the number of poles being an even multiple of 3. The windings form 2M layers within the slots, where M is an odd number greater than 2. The windings include three phases, each phase comprising two parallel branches. Each branch is formed by multiple U-shaped sub-conductors connected in series. Each phase winding includes multiple first conductor groups and multiple second conductor groups. The first conductor group includes three sub-conductors: a first conductor, a second conductor, and a third conductor. The second conductor group includes three sub-conductors: a second conductor, a third conductor, and a fourth conductor, or a first conductor, a second conductor, and a fifth conductor. The spans of the five conductors are K+1, K, K-1, K-2, and K+2, respectively. Each sub-conductor spans two adjacent layers, specifically the 2Nth layer and the 2N-1th layer. The second conductor groups are located on the Mth and M+1th layers, while the first conductor groups are located on other layers. This invention results in a compact stator structure, low manufacturing cost, minimal harmonic interference, and good operating performance.

Provided is an electric compressor comprising a motor housing (10) and a motor. The motor includes a stator secured to an inner part of the motor housing and a rotor disposed on the inner circumferential side of the stator. A rib (10b) is formed on an outer circumferential surface (10a) of the motor housing 10, extending in a direction inclined at a prescribed angle (α) from a direction along an axis (X) and turning in a circumferential direction (CD) about the axis (X). Let (θ) be the angle obtained by dividing the 360 degrees of one revolution in the circumferential direction (CD) by the greatest common divisor between a number of slots of the stator and a number of poles of the rotor, in which case an angle (φ) in the circumferential direction (CD) of the region from a start point (10b1) to an end point (10b2) of the rib (10b) is set to be larger than 0.5θ and smaller than 1.5θ.

This application discloses a motor, a compressor, and a cooling device. The motor includes a stator and a rotor, the stator includes a stator core and windings, the stator core is provided with a stator rod, the stator core includes a stator yoke and stator teeth, the stator teeth are connected to the stator yoke, the windings are wound around the stator teeth and located within the stator rod, the rotor includes a rotor core and permanent magnets, the rotor core is provided with magnet slots, the permanent magnets are located in the magnet slots, and if the outer and inner diameters of the stator core are D1 and D2, respectively, the thickness of the stator yoke is t, the width of the magnet slots is b, the thickness of the magnet slots is h, the number of poles of the rotor is 2p, and the number of permanent magnets is N, then 4.3 ≤ t ≤ 7.0, 0.577 ≤ D2 / D1 ≤ 0.6, and 1.3 ≤ b × h × 2p × N / 1000 ≤ 3.5.

The application discloses a high-power synchronous current torque-adjusting permanent magnet coupler based on series winding coils and relates to the technical field of permanent magnet couplers, mainly comprising a support, an input end assembly, a permanent magnet rotor part and an output end assembly; the output end assembly is arranged on the support, and the input end assembly is in transmission connection with one end of the output end assembly through the permanent magnet rotor part. The high-power synchronous current torque-adjusting permanent magnet coupler based on series winding coils can be controlled by a direct current to adjust electromagnetic torque and match load torque; the ratio of the slot pole number of the outer electromagnet winding is 1, the magnetic energy of the permanent magnet is fully utilized, and the high power is facilitated to be applied; the current is connected at the head and the tail, the winding circuit connection is simple, and only two brush slip rings are needed.

The electromachine includes a rotor body defining the rotor axis, the rotor body including a back iron, a plurality of shanks extending radially away from the back iron, and a plurality of pole caps, each detachably coupled to a corresponding one of the plurality of shanks. The back iron, the shanks, and the pole caps can be made of different materials, and the rotor is capable of changing the flow of magnetic flux to vary the number of poles of the motor. A retaining wrap, pre-tensioned, is provided to help fix the rotor components together and to allow for increased rotor speed. A retainer is positioned between the rotor body and the retaining wrap to compensate for thermal expansion and to keep the retaining wrap within a predetermined tension range.

This suppresses the influence of motor noise on the sensor. [Solution] A magnetic bearing device comprising a rotating body, a motor with an even number of poles that is not a multiple of 4, a radial electromagnet, a radial displacement sensor, a first oscillator, a second oscillator, and a demodulation circuit, wherein the radial displacement sensor has a first sensor pole pair and a second sensor pole pair, and each coil of the sensor pole pair is wired so that the polarity of each pole is different, one end of the first sensor pole pair is connected to one end of the second sensor pole pair such that pairs of sensor poles that are radially opposite to each other are opposite poles, the other end of the first sensor pole pair is connected to the first oscillator, the other end of the second sensor pole pair is connected to the second oscillator, and the midpoint voltage of the two sensor pole pairs is input to the demodulation circuit.

The application belongs to the technical field of permanent magnet preparation, and particularly relates to a permanent magnet magnetizing device, a preparation method and application thereof. The permanent magnet magnetizing device comprises at least one magnetizing track, the magnetizing track is in a circular arc shape, the magnetizing track is arranged by a plurality of magnetic steels, the magnetic poles of the magnetic steels are different, the magnetic steels are permanent magnets, and the residual magnetism of the magnetic steels is greater than or equal to 1T. The permanent magnet magnetizing device has a simple structure, can provide a magnetizing magnetic field with uniform and consistent magnetic pole strength, and can obtain a permanent magnet with good consistency when magnetizing. The NS magnetic pole zero magnetic area of the permanent magnet is less than or equal to 0.5mm, the pole width is N less than or equal to 3mm, and the permanent magnet with different magnetic pole widths or a magnetic pole number greater than or equal to 1 on one orientation pole surface can also be obtained.

This invention belongs to the field of motor winding technology, specifically relating to a winding process for a permanent magnet synchronous motor. The winding process includes the following steps: Step S1, process preparation and parameter verification: confirming the number of poles, number of slots, winding type, pitch, number of turns per slot, wire diameter, and number of parallel windings; verifying the enameled wire type, temperature resistance rating, and insulation material; Step S2, tooling preparation: installing the winding mold, debugging the winding machine, preparing slot insulation, interlayer insulation, slot wedges, binding tape, and insulating sleeves; cleaning the stator core slots; threading the enameled wire through the tensioner and connecting it to the end of the winding machine; Step S3, coil winding: starting and fixing the wire, leaving sufficient length at the wire end, fixing it on the pin of the winding mold, then winding the wire at a uniform speed, stopping the machine when the counter reaches the set number of turns. This device solves the problem of unstable tension applied to the enameled wire during the current winding process, which leads to loose winding, resulting in the motor being prone to overheating, wear, short circuits, and short lifespan.

This invention discloses a voltage-controllable parallel permanent magnet motor, comprising a rotor core; the rotor core surface is uniformly provided with a plurality of rotor slots, the number of slots being twice the number of motor poles; a permanent magnet is installed every other rotor slot, with the permanent magnets N, S alternating, and the magnetization direction of the permanent magnets being radial or parallel magnetization, the outer diameter of the permanent magnets being the same as the outer diameter of the rotor core; external excitation winding slots, the same number as the number of motor poles, are opened on the inner surface of the rotor slots where no permanent magnets are installed; and the rotor core is located near the shaft. An internal excitation winding slot with the same number of poles as the motor is formed. An excitation winding is wound on both the external excitation winding slot and the inner stator slot in the same radial direction, connected in series with the excitation winding coil of the same number of poles as the motor. Two mutually perpendicular magnetic isolation slots are formed on each side of the internal excitation winding slot, extending from one end of the internal excitation winding slot to near the inner ring of the permanent magnet to decouple the permanent magnet magnetic circuit and the electrically excited magnetic field. The end of the magnetic isolation slot near the inner ring of the permanent magnet is directly opposite the junction of the iron core and the permanent magnet, and the slotted part of the magnetic isolation slot is completely aligned with the permanent magnet. This invention effectively avoids competition between the two magnetic circuits and achieves efficient utilization of both magnetic fields.

This invention proposes an internal rotor multi-pole magnetic ring with dovetail groove positioning and an integrated blower rotor, relating to the field of blower motor technology. The magnetic ring is an annular permanent magnet integrally injection molded by an internal rotor. Several sets of dovetail grooves for magnetization positioning and mechanical engagement are arranged axially on its inner circumference. The number of dovetail grooves is a factor of the number of magnetic poles in the magnetic ring. This invention ensures extremely high positioning accuracy during the magnetization process through the dovetail groove structure, significantly reducing the pole number deviation rate of the magnetic ring from over 5% to below 0.5%. Secondly, during the molding process, the molten impeller material fills the dovetail grooves and forms a strong mechanical engagement and self-tightening interlock after cooling and shrinkage. This allows the rotor to maintain 100% torque transmission efficiency even under harsh high and low temperature cycles and vibration conditions, completely eliminating the risk of delamination failure. Finally, by adopting an integrated injection molding process, the traditional multiple separate processes such as bonding and assembly are directly eliminated.

The application belongs to the technical field of electric machines, and provides a permanent magnet motor eccentric vibration suppression method and system based on multi-source harmonics, obtains structural parameters of the motor, establishes a mapping relationship between characteristic force wave orders and frequencies generated by a permanent magnet source under eccentricity, a low-frequency current source and a high-frequency current source based on motor stator slot / rotor pole array combinations, and constructs a multi-source characteristic harmonic mapping library; obtains three-phase stator currents output by an inverter, extracts characteristic frequencies, and extracts sideband current components on both sides of a stator fundamental wave current; according to amplitude changes of the sideband current components, a target low-order force wave that needs to be suppressed is matched from the multi-source characteristic harmonic mapping library, a required generated compensation magnetic field strength is calculated, corresponding harmonic compensation current instructions are generated, and then the inverter is driven to output a controlled compensation current, so as to generate a hedging magnetic field with a phase opposite to that of the target low-order force wave in the motor. The application solves the problem of high-frequency noise caused by eccentricity.