205 results about "Rotor magnets" patented technology

The utility model relates to the technical field of rotor magnetic sheet assembling, and particularly discloses rotor magnetic sheet assembling equipment which comprises a magnetic sheet disc, a plurality of sliding grooves are formed in the magnetic sheet disc and used for containing magnetic sheet sets, an insertion disc is arranged in the center of the top of the magnetic sheet disc and comprises a rotor containing part, and the rotor containing part is used for containing rotor magnetic sheets. The rotor placing part is provided with a plurality of magnetic sheet grooves matched with the single magnetic sheets, and the plurality of magnetic sheet grooves are in butt joint with the sliding grooves respectively; the clamping assembly is used for clamping the rotor located at the rotor placing part; the fixing device is used for fixing the clamped rotor; and the plugging device comprises a plugging piece which is coaxial with the magnetic sheet disc, and the plugging piece is used for enabling the magnetic sheets located in the sliding grooves to penetrate through the magnetic sheet grooves and be inserted into the rotor. The motor rotor magnetic sheet loading device solves the problems that in the prior art, the loading process of motor rotor magnetic sheets mainly depends on manual operation, a large number of manpower resources are consumed, and the risk that fingers of workers are pinched exists.

The invention discloses a magnetic suspension rotor impeller, a pump head and a magnetic suspension pump, the magnetic suspension rotor impeller comprises a rotor main body and a magnetic suspension rotor, the rotor main body is cylindrical, a first cavity is formed in the rotor main body, and the magnetic suspension rotor is sealed in the first cavity; the magnetic suspension rotor comprises a rotor magnet and a nano ceramic composite coating, and the nano ceramic composite coating comprises a metal coating in contact with the rotor magnet and a nano ceramic coating arranged outside the metal coating. By forming the nano ceramic composite coating on the surface of the rotor magnet, the problem that the plastic coating cannot play a role in protection due to damage to the plastic coating in the assembly process is solved, so that the service life of the magnetic suspension rotor impeller can be prolonged, metal coating ions are prevented from being separated out to pollute a pumping medium, and the cleanliness of the pumping medium is ensured.

The invention relates to a rotor (9) for an electric machine (1a.. 1c), comprising a rotor shaft (10) with an axial central bore (14) and a radial outlet opening (15) connected thereto. The rotor (9) additionally comprises a laminated rotor core (11) which is mounted on the rotor shaft (10) and has a plurality of rotor laminations (12, 12a, 12a', 12b) stacked axially one on top of the other and a plurality of rotor magnets (17.. 17b'), which are arranged, in the laminated rotor core (11), in a plurality of magnet groups (F1.. F3), each of which is associated with a different pole of the rotor (9). In the laminated rotor core (11), a radial cooling channel (16), the inlet opening of which lies opposite the outlet opening (15), runs through a plurality of cutouts (E1, E3, E5) in a first rotor lamination (12a, 12a') and at least one cutout (E2, E4, E6') in a second rotor lamination (12a, 12a') adjoining the first rotor lamination (12a, 12a'). The invention further relates to an electric machine (1) having such a rotor (9), to a vehicle (27) having such an electric machine (1), to a method for operating the electric machine (1), and to a method for producing such a rotor (9).

The application relates to the technical field of motors, in particular to a rotor magnetic ring and a hollow cup motor. The rotor magnetic ring is a polar anisotropic magnetic ring, which comprises at least two pairs of magnetic poles, each pair of the magnetic poles is oppositely arranged on the two sides of the rotor magnetic ring, and the magnetic properties of adjacent magnetic poles are opposite; each magnetic pole comprises at least two magnetic force units arranged along the circumference of the magnetic pole in sequence, the magnetization directions of adjacent magnetic force units have a deflection angle beta, and the magnetization directions of all the magnetic force units are arranged along the circumference with the deflection angle beta, so that the magnetic field intensity on the outer side of the rotor magnetic ring is greater than that on the inner side, the magnetic field energy is concentrated in an effective working area, and the overall working performance of the hollow cup motor is improved.

The invention relates to the technical field of permanent magnet materials, in particular to a method for increasing resistance of a permanent magnet, which comprises the following steps of: (1) weighing raw materials, smelting and refining to obtain alloy melt; (2) the alloy melt is subjected to cooling, powdering, forming, sintering treatment and aging treatment, cooling is conducted, and a samarium cobalt blank is obtained; (3) the samarium cobalt blank is subjected to machining grinding, slicing, end face grinding, cleaning and drying, and a plurality of flaky magnets are prepared; sequentially performing argon plasma treatment and nitrogen plasma treatment on each end surface of the flaky magnet, and sputtering a boron nitride layer and a silicon dioxide layer on the end surface of the flaky magnet by adopting a magnetron sputtering method; and carrying out annealing treatment, bonding and curing treatment to obtain the high-resistance permanent magnet. According to the method for increasing the resistance of the permanent magnet, the resistance of the rotor magnet can be effectively increased, and eddy current generated by the motor rotor magnet is further reduced.

The utility model provides a water pump plastic magnetic rotor, which relates to the field of water pump parts and comprises a rotor magnet and a blade structure which are integrally formed, a blade cover is arranged on the blade structure, a bearing is arranged in the rotor magnet, a supporting structure is arranged on the top surface of the inner wall of the blade cover, and the lower end surface of the supporting structure is matched with the curved surface of the upper end surface of the blade structure in shape. The supporting structure is used for providing contact supporting between the blade cover and the blade structures, and positioning structures with the same number as the blade structures are arranged on the supporting structure. Stable contact support is provided between the blade cover and the blade structure through the supporting structure, it is ensured that the relative positions of the blade cover and the blade structure are stable in the water pump operation process, the positioning structure is matched to ensure the relative position precision between the blade and the blade cover, and therefore the operation efficiency and stability of the water pump are improved.

The fan comprises a motor, an impeller and a shell which are sequentially arranged from inside to outside, the motor comprises a rotating shaft, a stator and a rotor which are sequentially arranged from inside to outside, the impeller comprises an impeller body and a first impeller middle disc, and the first impeller middle disc is fixedly connected with the impeller body on one side face of the impeller body; one axial end of the rotating shaft is inserted into the first impeller middle disc, and the other axial end of the rotating shaft is rotatably connected with an end cover of the volute; the rotating shaft is rotatably connected with the stator; the rotor comprises rotor magnetic steel and a rotor yoke arranged on the outer side of the rotor magnetic steel in a sleeving mode, the rotor yoke and the first impeller middle disc are integrally formed, and the rotor magnetic steel is fixedly connected with the rotor yoke. According to the draught fan and the range hood comprising the draught fan, the motor and the impeller are connected without installation holes or fasteners such as screws and pins, the connecting structure is simplified, the connecting and assembling steps are omitted, and therefore the assembling efficiency is improved, and the cost is reduced.

The utility model discloses a portable electric fan. A fan wheel and a wheel-shaped mounting seat are arranged in a first cylindrical shell, a front cover is arranged at a front port, and a rear cover is arranged at a rear port. A rotor magnet is arranged in a first barrel-shaped hub part of a fan wheel, and a motor rotating shaft is arranged in the center of a barrel bottom. The wheel-shaped mounting seat comprises a cylindrical contour part, a second cylindrical hub part and a plurality of first plate-shaped spokes. And a tubular mounting seat is arranged at the center of the barrel bottom of the second barrel-shaped hub part. A motor rotating shaft is assembled in the tubular mounting seat, and a stator coil is sleeved outside the tubular mounting seat. The front cover is embedded into the front end of the cylindrical contour part and comprises a front cover hub part and a plurality of second plate-shaped spokes. The first plate-shaped spokes and the second plate-shaped spokes form a plurality of flow guide plates in a one-to-one correspondence mode, and air outlet airflow can be concentrated.

The utility model discloses a motor direct drive pump, and relates to the technical field of drive pumps, a stator assembly, a rotor assembly, a main shaft assembly and a piston assembly are installed in a shell assembly, the stator assembly is fixed on the shell assembly, a rotor magnet is installed on a connecting disc of the rotor assembly in a positioning mode, and the rotor magnet is arranged on the periphery of the stator assembly in a surrounding mode. The main shaft assembly is rotationally assembled in an inner cavity of the shell assembly, circumferentially fixed to the connecting disc and used for achieving driving rotation, and due to the fact that the rotor assembly has the larger radial size, larger torque can be provided; the main shaft assembly is provided with an eccentric driving part, the piston assembly is slidably assembled in the piston cavity, and when the main shaft assembly rotates, the eccentric driving part drives the piston assembly to do reciprocating linear translation, so that pumping is achieved; a motor structure and a pump structure are integrated with each other, so that the structure of the pump body is simplified, higher integrity is achieved, the rotor assembly has larger radial size, and the size of the whole machine can be reduced under the condition that the same torque is output.

Rotor (1) of an electric machine (2), in particular for a drive train (3) of a motor vehicle (4), comprising a rotor body (5) with a plurality of magnet pockets (6) extending axially through the rotor body (5), in each of which at least one rotor magnet (7) is received, and the rotor magnets (7) are each fixed by means of a plastic body (8) extending in the magnet pockets (6), wherein the rotor body (5) further comprises a plurality of cooling channels (9) extending axially through the rotor body (5), through which a cooling fluid (10) can flow, wherein the cooling channels (9) have an end-face outlet opening (11) in the rotor body (5), from which, during operation of the rotor (1), the cooling fluid (10) is discharged from the cooling channels (9) into the rotor environment, wherein at least one of the plastic bodies (8) with a fluid guide element (12) projects axially out of the rotor body (5) and thus connects with one of the outlet openings (11). interactsthat during operation of the rotor (1) the cooling fluid (10) exiting from the outlet opening (11) is subjected to an axial force component by the fluid guiding element (12) of the plastic body (8), wherein two circumferentially adjacent magnetic pockets (6) in the cross-section of the rotor body (5) each have a V-shaped arrangement (15) with a radially inwardly pointing tip, where The plastic bodies (8) of two circumferentially adjacent V-shaped arrangements (15) emerge axially from the magnet pockets (6) at the first end face (13) of the rotor body (5) and form a substantially W-shaped contour in cross-section, wherein the fluid guide element (12) is formed at the radially outwardly pointing tip (16) of the W-shaped contour.

The application discloses a forward and reverse clock movement, which comprises a shell, an MCU controller, a transmission structure, a first coil motor, a second coil motor and a rotor magnet which are arranged in the shell; the transmission structure comprises multiple-stage gears which are sequentially and mutually meshed, and a gear for being connected with a pointer is a pointer gear; the rotor magnet is fixedly connected with a first-stage gear of the multiple-stage gears; the MCU controller inputs a first driving pulse current into a first coil of the first motor coil to generate a magnetic field so as to make the first-stage gear rotate, and further make the pointer gear rotate forward; the MCU controller inputs a second driving pulse current into a second coil of the second motor coil to generate a magnetic field so as to make the first-stage gear rotate, and further make the pointer gear rotate reversely. When time needs to be corrected, a direction with a small rotation amplitude of the pointer is selected to be adjusted forward or reversely, so that the time can be corrected more quickly and accurately.

The invention relates to a radial magnetic flux dual-rotor active heat dissipation frameless torque motor, and belongs to the technical field of frameless torque motors, the radial magnetic flux dual-rotor active heat dissipation frameless torque motor comprises a rotor assembly and a stator assembly, the rotor assembly comprises an inner rotor steel sleeve and an outer rotor steel sleeve, an inner rotor magnet is arranged on the inner rotor steel sleeve, an outer rotor magnet is arranged on the outer rotor steel sleeve, the stator assembly comprises a lower fixing plate, a coil winding is arranged on the upper side of the lower fixing plate, and an upper fixing plate is arranged on the upper side of the coil winding; the rotational inertia of the rotor can be improved through the plurality of inner rotor magnets and the plurality of outer rotor magnets, the size of the motor is reduced, the space utilization rate is improved, the motor is compact in structure, high in slot fullness rate and high in efficiency, the motor can actively dissipate heat through the heat dissipation blades, manufacturing and winding are extremely convenient, and mass production is facilitated.

The invention discloses a method for eliminating local working hot spots of a high-temperature superconducting rotor magnet, and the method comprises the steps: dividing a cold helium circulation channel into a plurality of heat management units according to the real-time temperature value and temperature gradient of each position of the magnet, and periodically calculating the comprehensive severity index of each unit; and when the temperature of a certain unit exceeds a hot spot temperature threshold value or the temperature gradient exceeds a hot spot gradient threshold value, the unit is judged as a local working hot spot. After the hot spot is judged, valve opening degrees of a shunting branch and a diversion branch which are connected with the hot spot unit are adjusted through cooling capacity priority scheduling, and on the premise that the total flow is basically unchanged, the flow of cold helium flowing through the hot spot unit is increased in a self-adaptive mode, and the flow of a low-load unit is reduced; and meanwhile, high-temperature cold helium subjected to heat exchange with a hot spot is preferentially led out of a circulating system or led to a special heat dissipation branch through a flow guide branch, flow distribution is recovered in combination with overall temperature gradient feedback, and rapid transfer and lead-out of local heat are achieved. According to the invention, local working hot spots can be effectively eliminated.

The utility model provides a kind of fixing structure of inner rotor magnet, the fixing structure includes motor shaft, rotor core, magnet and fixed clip, the outer surface of motor shaft is evenly distributed with multiple pressing ribs along the axial direction, multiple pressing ribs are used to with the six petal sheet center hole structure of fixed clip interference fit;Multiple installation grooves are evenly provided on the outer circumference of rotor core, multiple installation grooves are used to accommodate multiple the magnet;Fixed clip includes six petal sheet, cantilever spring piece and sawtooth;The end of six petal sheet is inclined to horizontal plane 5-10 °;Cantilever spring piece is distributed in the outer ring part of fixed clip, and cantilever spring piece is V-shaped bending structure;The sawtooth is located in the outer circle edge of fixed clip, and sawtooth contacts the magnet, so that magnet axial limit position.The fixing structure provided by the utility model has the advantages of simple structure, easy installation, vibration absorption, elastic fixing, eccentric force control, magnetic field pulsation, improved heat dissipation and the like.

The invention provides a permanent magnet motor rotor magnetic steel fixing structure and a processing device thereof. A plurality of magnetic steels are sleeved on the periphery of the rotating shaft, and a magnetic isolation bridge is arranged between adjacent magnetic steels; a first fastening layer, a bonding layer and a second fastening layer are sequentially arranged on the periphery of the magnetic steel, at least part of the bonding layer is arranged between the peripheral face of the magnetic steel and the first fastening layer, at least part of the bonding layer is arranged on the outer surface of the side, away from the magnetic steel, of the first fastening layer, and the second fastening layer is arranged on the outer side of the bonding layer in a surrounding mode in the circumferential direction of the rotating shaft. The tensile strength of the second fastening layer is larger than that of the first fastening layer, and the bonding layer is made of insulating materials. Through the above structure, the multi-layer structure of the magnetic steel bears centrifugal force together under the working condition of high-speed rotation, the second fastening layer bears main circumferential tensile stress, and the insulation bonding layer is matched to improve the fixing strength and anti-throwing capability of the magnetic steel, reduce stress concentration, restrain an eddy current loop and heat, and give consideration to both mechanical safety and electromagnetic performance. The rotor is suitable for high-rotating-speed and high-power permanent magnet motor rotors.

The present invention provides a linear drive mechanism. The linear drive mechanism comprises a housing, a front cover and a rear cover that are respectively fixed at two opposite ends of the housing, a stator disposed in the housing, and a rotor disposed in the stator and rotatably connected to the stator; the front cover is provided with a sliding bearing integrally formed with the front cover; the stator comprises an annular stator core and a winding coil fixed in the stator core; and the rotor comprises a rotating shaft and a rotor magnet. The linear drive mechanism further comprises a lead screw inserted into the rotor; the lead screw comprises a hollow lead screw nut inserted and fixed in the rotor and a central lead screw disposed in the lead screw nut and extending to pass through the front cover; and the lead screw nut is used as the rotating shaft. The linear drive mechanism in the present invention can achieve real-time control, and has high reliability, high efficiency, balanced driving force, low overall height, short length, mounting-friendly size, a simple structure, and low costs.

A magnetic geared electrical machine includes: a stator; a magnetic pole piece rotor including a plurality of magnetic pole pieces disposed radially inward of the stator; an inner rotor including a plurality of rotor magnets, disposed radially inward of the plurality of magnetic pole pieces, and configured to rotate at a higher speed than the magnetic pole piece rotor; and a fan for cooling at least one of the stator, the magnetic pole piece rotor, or the inner rotor. The magnetic pole piece rotor further includes a power transmission shaft disposed on one side in an axial direction relative to the plurality of magnetic pole pieces, and configured to transmit rotational power to and from an external device. The fan is attached to the inner rotor on an opposite side to the power transmission shaft with the rotor magnet therebetween in the axial direction.

[Problem] To provide: a brushless motor in which the effect of suppressing heat generation is enhanced; and a handpiece equipped with such a brushless motor. [Solution] In an inner rotor magnet type brushless motor 1, a coil pattern 162 of each phase formed on a flexible substrate of a roll-wound stator coil is characterized in that a plurality of pattern parts 165 are arranged in parallel without providing an intermediate node from the start of winding to the end of winding, the end parts of one of the start of winding and the end of winding are knotted to each other as a common side node 165c, and the end parts of the other are knotted to each other as a terminal side node 165t of each phase.

A motor of an electric cylinder and an encoder for the motor, the motor of the electric cylinder comprising a motor body, an encoder, a rotor joint and an encoder fixing part. The motor body includes a rotor, a stator coil and a rotor magnet combined with the rotor, which are accommodated in a housing. The rotor has a shaft hole to provide a rotation shaft passing through. The encoder is installed on the motor body and includes a fixing ring, a magnet fixing seat, an encoder magnet and a magnetic sensing element, the fixing ring is fixed on the rotation shaft, and the magnet fixing seat is combined with the fixing ring. The encoder magnet is installed on the magnet fixing seat, and the magnetic sensing element is separated from and opposite to the encoder magnet. The magnet fixing seat can rotate relative to the fixing ring to adjust the pole position of the encoder magnet relative to the magnetic sensing element. The rotor joint is provided on the rotor and fixed with the rotation shaft at a first corresponding position, and the encoder fixing part is provided on the fixing ring and fixed with the rotation shaft at a second corresponding position.

The invention discloses motor assembling and magnetic inserting equipment and a using method thereof, and relates to the technical field of motor production, the motor assembling and magnetic inserting equipment comprises a base, a connecting frame is fixedly mounted on the base, a first electric push rod is fixedly mounted on the connecting frame, and a top plate is fixedly mounted at the output end of the first electric push rod; a material disc is fixedly installed on the inner wall of the connecting frame, a sliding block is installed on the material disc in a sliding mode, a round block is rotatably installed on the sliding block, a sliding rod is fixedly installed on the sliding block, a protruding rod is fixedly installed at the bottom end of the sliding rod, and a rotating ring is rotatably installed at the bottom end of the material disc. By rotating the circular block, the circular block can drive the two side plates to move in the direction away from or close to each other through the insertion strips, so that the distance between the two side plates is matched with the length size or the width size of the through hole, and the rotating ring is rotated to drive the sliding rod and the sliding block to move through the convex rod, so that the position of the circular block is adjusted; therefore, different rotor magnetic insertion requirements can be met.

The invention relates to a brushless motor rotor magnetic shoe thrust height inner diameter detection device, and belongs to the technical field of new energy motor processing. Comprising a first installation frame and a second installation frame installed above the first installation frame, a magnetic shoe main detection mechanism is installed in the vertical direction, a magnetic shoe inner diameter detection mechanism is installed behind the magnetic shoe main detection mechanism, and an indexing rotation tool is movably arranged below the magnetic shoe main detection mechanism and the magnetic shoe inner diameter detection mechanism; the magnetic shoe main detection mechanism comprises a motor detection fixing mechanism, a magnetic shoe height detection mechanism and a magnetic shoe bonding strength detection mechanism; through the integrated structural design, synchronous detection of the height and the bonding strength of the magnetic shoe is achieved, the inner diameter uniformity detection function is matched, a multi-parameter integrated detection mode is achieved, and compared with a traditional manual detection means, the device has remarkable technical advantages. The device can synchronously complete measurement of two key indexes at the same station without repeated clamping and station switching, so that the detection time is greatly shortened, and the detection efficiency is improved.

A propulsion system includes a propulsion device and a flight control device. The propulsion device includes a motor. The motor includes a rotor magnet. The flight control device acquires a motor temperature. The flight control device acquires a motor current. The flight control device performs management processing for managing demagnetization of the rotor magnet using driving information such as the motor temperature and the motor current. The management processing includes processing of determining whether a state of the motor is in an abnormal region, a demagnetization region, or a general region. In the management processing, the motor current is limited according to which region the state of the motor is in.

The invention belongs to the technical field of energy-saving household appliance spare and accessory parts, and particularly relates to a reciprocating deflection electromagnetic structure motor. Comprising a mounting shell, the mounting shell is rotatably connected with an arc-shaped rotor, the arc-shaped rotor is fixedly connected with a rotor magnet, the arc-shaped rotor is fixedly connected with an output shaft, a magnetic conductive iron core is fixedly connected in the mounting shell, the magnetic conductive iron core is fixedly connected with two symmetrically distributed coils, and the magnetic conductive iron core is in a U shape. The two coils are respectively arranged on two vertical parts of the U-shaped magnetic conductive iron core, and the arc-shaped rotor is fixedly connected with a magnetic shielding cover. Force for driving the arc-shaped rotor to swing is applied to the rotor magnet through the U-shaped magnets with continuously and alternately changed magnetic poles, and the moment of a magnetic field borne by the arc-shaped rotor is increased by enabling the included angle between the stress direction of the rotor magnet and the connecting line between the stress point of the rotor magnet and the swing center point of the arc-shaped rotor to be always larger than 45 degrees. And the utilization efficiency of the device on magnetic energy is further improved.

This invention belongs to the field of motor technology and discloses a high-linearity finite-angle torque motor, comprising a cylindrical rotor and a cylindrical stator, with the rotor housed within the stator. The stator includes N coils and N constant magnetic circuit channels, where N is an even number of at least 2. The rotor's magnet portion has N polarities. The N coils of the stator are evenly arranged circumferentially on the inner side of the stator, with adjacent coils separated by constant magnetic circuit channels. The ends of all coil frames and the ends of the constant magnetic circuit channels together form the rotor's rotational track. Adjacent stator coils have opposite polarities after being energized, and adjacent rotor magnets also have opposite polarities. This invention employs a special stator lamination structure, theoretically eliminating stator cogging torque within the motor's operating angle range, thus improving the linearity of the motor's output torque. Compared to traditional slotted finite-angle torque motors, the output torque fluctuation is reduced by more than 70%.

A magnetic gear rotary electric machine includes a housing, a stator having a stator core, a coil, and a stator magnet provided on an inner side of the stator core, a first rotor having a pole piece provided on an inner side of the stator, a second rotor having a rotor core provided on an inner side of the first rotor and a plurality of rotor magnets provided at intervals in a circumferential direction on the rotor core, a plurality of movable bearings provided on the housing, abutting against an outer peripheral surface of at least one of the first rotor and the second rotor, and arranged at intervals in the circumferential direction, and an actuator that moves the movable bearings in a direction including a plane orthogonal to an axis.

The invention provides an outer rotor direct-drive electric tool which comprises a handle, a head shell, an outer rotor motor and a working head, the outer rotor motor comprises an outer rotor and a stator, the outer rotor comprises a rotor magnet yoke assembly, fan blades and an output shaft, the stator comprises a stator iron core and a plurality of coils, and the stator iron core sleeves the output shaft and is rotationally connected with the output shaft; the output end of the output shaft penetrates through the bearing seat to the outer side of the head shell and is fixedly connected with the working head; the rotor magnet yoke assembly sleeves the stator and is fixedly connected with the output shaft through the fan blades; the rotor magnet yoke assembly comprises a rotor magnet yoke and a plurality of magnetic sheets, a plurality of closed clamping grooves are distributed in the inner wall of the rotor magnet yoke at intervals in the circumferential direction, and the clamping grooves are formed in the axial direction of the rotor magnet yoke; the magnetic sheets are matched with the clamping grooves in shape, are embedded into the clamping grooves to realize radial fixation, and are also bonded with the clamping grooves through glue; a plurality of protrusions matched with the clamping grooves in shape are arranged on the sides, facing the rotor magnet yoke, of the fan blades at intervals, and the protrusions are embedded into the clamping grooves so that the protrusions can be in interference fit with the clamping grooves.

The utility model provides a silicon steel sheet rotor and a motor, and the silicon steel sheet rotor comprises a rotor magnet yoke which is provided with a shaft hole towards the center and is used for cooperating with a rotating shaft; the magnetic steel fixing pieces are arranged on at least one end face of the rotor magnet yoke; a plurality of positioning strips which are distributed along the circumferential direction are arranged on the magnetic steel fixing piece; the magnetic steel is arranged in the circumferential direction of the magnetic steel fixing piece and is embedded between every two adjacent positioning strips, the problem that the magnetic steel is prone to displacement or looseness during high-speed rotation is effectively solved, and it is ensured that the magnetic steel is kept stable in the high-speed rotation process.

A rotor magnet of the disclosure is provided turnably relative to a substrate to which a stator or a rotation angle sensor is fixed, is disposed so as to face the stator or the rotation angle sensor, and is formed by injection-molding a material mixture of a magnetic material and a resin through a pinpoint gate. The rotor magnet includes a cylindrical portion formed in a cylindrical shape and having a plurality of magnetic poles arranged, and a rib formed in a shape protruding in a radial direction at an end portion of the cylindrical portion in an axial direction. The thickness of the cylindrical portion is smaller than the inner diameter of a tip end portion of the pinpoint gate, and the thickness of the rib is equal to or larger than the inner diameter of the tip end portion of the pinpoint gate.

The invention relates to the technical field of wind driven generator assembly tools, in particular to a modular device for pushing a magnetic pole box of a wind driven generator rotor, which comprises a pushing base, a base plate, a guide cushion block and side limiting plates, the base plate and the guide cushion block are arranged on the pushing base, and the side limiting plates are adjustably and symmetrically arranged at the top of the pushing base. The device further comprises an anti-overturning isolation unit, the anti-overturning isolation unit comprises a stand column and a plug pin rod, and the magnetic pole box is prevented from overturning, adsorbing and rebounding. The device is designed to be used for horizontally pushing different types of rotor magnetic pole boxes, the device can be rapidly matched with the magnetic pole boxes with different widths and heights through the adjustable side edge limiting plates, the detachable base plates and the guide cushion blocks, and the tool replacement time is shortened; the design of the guide grooves and the base plate protrusions ensures accurate positioning, operation flexibility is remarkably improved, universality is high, and the device is suitable for magnetic pole boxes of various models to improve operation efficiency and economical efficiency.

A rotor (9) for an electric machine (1a..1c) is described, comprising a rotor shaft (10) with an axial central bore (14) and a radial outlet opening (15) connected thereto. The rotor (9) also includes a rotor lamination stack (11) mounted on the rotor shaft (10), comprising several axially stacked rotor laminations (12, 12a, 12a', 12b) and several rotor magnets (17..17b') arranged in the rotor lamination stack (11) in several magnet groups (F1..F3), each group being assigned to a different rotor pole of the rotor (9). In the rotor lamination stack (11) a radial cooling channel (16) whose inlet opening is opposite the outlet opening (15) runs through several recesses (E1, E3, E5) in a first rotor lamination (12a, 12a') and at least one recess (E2, E4, E6') in a second rotor lamination (12a, 12a') adjacent to the first rotor lamination (12a, 12a').Furthermore, an electric machine (1) with such a rotor (9), a vehicle (27) with such an electric machine (1), a method for operating the electric machine (1) and a method for manufacturing such a rotor (9) are specified.