Magnetic ring type high speed non-damping bar power frequency generator

Abstract

The present invention discloses a magnetic ring-type high-speed, damping-free industrial frequency generator, which relates to the field of generator technology. A winding stator is installed within the generator housing. The stator is provided with a stator core. The stator core uses sector-shaped segments, which divide the entire circular segment into six equal stator sectors. Stator slots are provided within the winding stator, and three layers of coils are provided within the slots. A rotor is connected to the inner diameter of the stator via front and rear bearings. A magnet, a magnetic yoke, and a magnetic baffle are installed on the rotor shaft. The magnet is annular, and the inner hole of the magnet is fixed to the magnetic yoke connected to the motor shaft via magnetic glue. The surface-mounted magnetic ring and the magnetic yoke are attached to the magnetic baffle via magnetic baffle fastening bolts. The magnet is a segmented magnetic ring. The inner circle of the magnetic yoke is provided with a keyway, which is connected to the motor shaft for positioning and fixation via a key. The present invention has stable power output, low energy consumption, high efficiency, low noise, improved assembly efficiency, safety, and reliability, reduced costs, and broad application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of generators, in particular to a magnetic ring type high-speed power frequency generator without damping strips. Background Art

[0002] Permanent magnet generators use permanent magnets to provide excitation. They are widely used due to their simple structure, high reliability, small size, light weight, and high specific power. Permanent magnet generators have good power generation performance at medium and low speeds. Under the same power level, the output power of permanent magnet generators at idle speed is twice that of excitation generators. Permanent magnet generators use self-starting voltage regulators and do not require an external excitation power supply. They are highly efficient and can significantly extend battery life, reduce battery maintenance, and have no radio interference. They are particularly suitable for working in harsh environments with humidity or a lot of dust. When oscillation occurs during the operation of a synchronous motor, there is relative motion between the rotor and the rotating magnetic field, and an induced current is generated in the damping winding. This current interacts with the rotating magnetic field to generate a torque that prevents the rotor from running relative to the rotating magnetic field, thereby reducing the oscillation of the synchronous motor, increasing motor stability, and suppressing excessive transient changes in power or torque. Permanent magnet generators still have the following problems:

[0003] (1) Traditional permanent magnet generators generally do not consider damping design, resulting in poor load stability. The transient changes of sudden load addition and removal are severe, and may even lead to power generation collapse.

[0004] (2) In the past, the damping cage of the generator required slots for the damping strips to be opened on the rotor punching sheets. The damping strips also needed to be sub-arc welded to the damping end ring. Especially for traditional permanent magnet generators, the damping end plate needed to be at a large distance from the magnetic steel core. Otherwise, during sub-arc welding, the arc would be affected by the magnetic field and produce a large amount of spatter. This would result in a longer damping strip, poor structural strength, and waste of materials, increasing costs and manufacturing expenses.

[0005] (3) The air gap of traditional surface-mounted magnets is uneven, and the vibration noise is large. When bonding surface-mounted magnets, tooling must be used for assembly. The assembly efficiency and safety are low, and the reliability is average. At the same time, there is a disadvantage that the magnets fly out due to high-speed rotation.

[0006] (4) The traditional method of punching rotor sheets from the inner diameter of the stator has a high cost for the rotor core, and the utilization rate of the stator and rotor sheets is only about 51%, resulting in serious material waste and a significant increase in the cost of the entire machine.

[0007] Based on this, it is particularly necessary to design a magnetic ring type high-speed non-damping strip power frequency generator. Summary of the Invention

[0008] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a magnetic ring type high-speed power frequency generator without damping strips, which has a compact structure, reasonable design, eliminates complex damping strips and damping end rings, has stable power output, low energy consumption, low noise, high efficiency, greatly improves assembly efficiency and safety, has high reliability, reduces costs, and is easy to promote and use.

[0009] In order to achieve the above-mentioned purpose, the present invention is realized by the following technical scheme: a magnetic ring type high-speed non-damping bar power frequency generator, comprising a front cover, a rear cover, a winding stator, a magnetic steel, a magnetic yoke, a magnetic steel baffle, a stator core, a motor shaft, a front bearing, a rear bearing, a water-cooled machine base, an outlet box, an encoder stator, an encoder rotor, an encoder socket, and a foot. The generator housing composed of the front cover and the rear cover is equipped with a winding stator, and a stator core is provided on the stator. The stator core is made of The stator has a stator slot with three layers of coils in it. The stator is connected to the rotor through the front bearing of the front end cover and the rear bearing of the rear end cover on the inner diameter of the stator. The rotor shaft is equipped with a magnet, a magnetic yoke and a magnetic baffle. The magnet is arranged in a surface-mounted magnetic ring type. The surface-mounted magnetic ring and the magnetic yoke are fitted with the magnetic baffle through the magnetic baffle fastening bolts. The magnet adopts a segmented magnetic ring type. The inner circle of the magnetic yoke is provided with a keyway, which is connected to the motor shaft through a key for positioning and fixing. The end of the rotating shaft extends out of the front end cover to form a shaft extension; the front and rear ends of the motor rotating shaft are respectively equipped with a front bearing and a rear bearing, and an oil seal is provided at the connection between the front bearing and the motor rotating shaft, the bearing inner cover on the inner side of the front bearing is fixed to the front end cover by the inner cover fastening screw, the encoder stator is installed at the inner hole behind the rear end cover of the motor, and the encoder rotor is installed at the rear end of the motor rotating shaft, and an encoder cover is provided around the encoder stator and the encoder rotor, and the encoder stator is fixed through the stator pressure plate by the pressure plate fastening screw, and the encoder rotor is fixed by the rotor fastening screw; a water-cooled machine base is installed between the front end cover and the rear end cover through the end cover fastening bolts, and an outlet box is provided on the top of the water-cooled machine base, and a lead-out power line is provided on the surface of the outlet box through an outlet screw sleeve, and the lead-out power line is connected to the stator winding end of the winding stator through the lead-out line, and an encoder socket is also installed on the side of the outlet box, and the encoder socket is electrically connected to the temperature measuring element and the encoder lead-out line, and a base foot is installed at the bottom of the casing.

[0010] By tightly fitting the surface-mounted magnetic steel yoke with the magnetic steel baffle, eddy currents are induced in the rotor yoke under the action of the magnetic steel magnetic field. These eddy currents are closed by the magnetic steel aluminum baffle, which acts as a damping winding. This suppresses the oscillation of the generator terminal voltage when the generator is suddenly loaded or unloaded, and plays a damping role in stabilizing the generator terminal voltage. This eliminates the need for complex damping strips (damping cages) and damping end rings, and eliminates the need for welding. This saves material, reduces costs, and lowers manufacturing expenses. Furthermore, the lack of welding significantly enhances reliability. Previous generator damping cages required slots for damping strips to be drilled in the rotor stampings, and the damping strips also needed to be sub-arc welded to the damping end rings. In particular, in conventional permanent magnet generators, the damping end plates needed to be a considerable distance away from the magnetic steel core. Otherwise, during sub-arc welding, the arc would be affected by the magnetic field, producing a large amount of spatter. This resulted in longer damping strips, poor structural strength, and wasted material. The present invention overcomes the aforementioned shortcomings while maintaining a simple and compact structure, resulting in a smaller generator, lighter weight, reduced costs, and improved reliability.

[0011] Preferably, the magnetic steel is in an annular shape, and the inner hole of the magnetic steel is fixed to a magnetic conductive yoke connected to the motor shaft by means of magnetic steel glue.

[0012] Preferably, the stator core adopts sector-shaped segments, and the whole circle is divided into six equal parts of stator sectors. Stator slots are evenly distributed on each stator sector. The arc edge of each stator sector is provided with a buckle slot. The two ends of the stator sector are respectively provided with a dovetail slot and a convex dovetail. The dovetail slot matches the convex dovetail. The six stator sectors are formed into a whole circle by buckling the adjacent dovetail slots and the convex dovetail.

[0013] Preferably, the angle between adjacent buckle plate slots on the stator sector is 24°. When stacking, the six stator sector plates of the next layer are rotated 24° at the beginning, and the stator slot shape and buckle plate slot shape of the whole circle plate composed of the six stator sector plates of the previous layer are respectively coincident with the stator slot shape and buckle plate slot shape of the whole circle plate composed of the six stator sector plates of the previous layer. However, the joints of the six plates of the previous layer and the joints of the six plates of the next layer are rotated 24°, and the sector plates of the previous layer just cover the joints of the next layer, forming layer-by-layer pressure to prevent the plates from warping.

[0014] Preferably, the stator core is made into a stator core with skew slots by means of skew keys. The stator core is skewed by a stator tooth pitch, which can effectively eliminate tooth harmonics, improve the generator voltage waveform and reduce the cogging torque.

[0015] Preferably, the winding wound on the stator core adopts a winding structure combining two-thirds short-distance stacked winding and concentric winding, and adopts three-layer coils to form a three-phase symmetrical winding, thereby improving the utilization rate of the stator slots. The voltage waveform of the generator is a sine wave, the voltage harmonics are small, and the voltage waveform is good.

[0016] The beneficial effects of the present invention are as follows: the equipment has a compact structure, eliminates complex damping strips and damping end rings, the generator is small in size and lighter in weight, has stable power output, low energy consumption, low noise, and high efficiency, greatly improves assembly efficiency and safety, has high reliability, reduces costs, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments;

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 for Figure 1 Left view of;

[0020] Figure 3 Schematic diagram of the structure of the magnetic steel of the present invention;

[0021] Figure 4 Schematic diagram of the structure of the stator core of the present invention;

[0022] Figure 5 Schematic diagram of the structure of the stator sector of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of a full-circle piece composed of six stator segments of the present invention;

[0024] Figure 7 Schematic diagram of the structure of the three-phase winding of the present invention;

[0025] Figure 8 It is a structural schematic diagram of the A-phase winding of the present invention. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] Reference Figure 1-8, This specific embodiment adopts the following technical solution: a magnetic ring type high-speed non-damping strip power frequency generator, including a front cover 1, a rear cover 2, a winding stator 3, a magnetic steel 4, a magnetic yoke 5, a magnetic steel baffle 6, a stator core 7, a motor shaft 8, a front bearing 9, a rear bearing 10, a water-cooled machine base 11, an outlet box 12, an encoder stator 13, an encoder rotor 14, an encoder socket 15, and a foot 16. The generator housing composed of the front cover 1 and the rear cover 2 is equipped with a winding stator 3, and a stator core 7 is provided on the stator. The stator core 7 adopts a sector-shaped piece and has a winding stator. 3 is provided with a stator slot 7-2, and a three-layer coil is provided in the stator slot 7-2. The inner diameter of the stator is connected to the rotor through the front bearing 9 of the front end cover 1 and the rear bearing 10 of the rear end cover 2. The rotor shaft is mounted with a magnet 4, a magnetic yoke 5, and a magnetic baffle 6. The magnet 4 is configured as a surface-mounted magnetic ring. The surface-mounted magnetic ring and the magnetic yoke 5 are fitted with the magnetic baffle 6 through the magnetic baffle fastening bolts 17. The magnet 4 adopts a segmented magnetic ring type. The inner circle of the magnetic yoke 5 is provided with a keyway, which is connected to the motor shaft 8 by a key to position and fix it to transmit torque. The end of the motor shaft 8 extends out of the front end cover 1 The motor shaft 8 is provided with a front bearing 9 and a rear bearing 10 at the front and rear ends respectively. An oil seal 18 is provided at the connection between the front bearing 9 and the motor shaft 8. The bearing inner cover 19 on the inner side of the front bearing 9 is fixed to the front end cover 1 by the inner cover fastening screw 20. The encoder stator 13 is installed at the inner hole behind the rear end cover 2 of the motor. The encoder rotor 14 is installed at the rear end of the motor shaft 8. The encoder stator 13 and the encoder rotor 14 are provided with an encoder cover 21 on the periphery. The encoder stator 13 is fixed through the stator pressure plate 23 by the pressure plate fastening screw 22. The rotor 14 is fixed by the rotor fastening screws 24; the water-cooling base 11 is installed between the front cover 1 and the rear cover 2 by the end cover fastening bolts 25, and the top of the water-cooling base 11 is provided with an outlet box 12. The surface of the outlet box 12 is provided with a lead-out power line 27 through an outlet screw sleeve 26. The lead-out power line 27 is connected to the stator winding end 29 of the winding stator 3 through the lead-out line 28. The side of the outlet box 12 is also installed with an encoder socket 15, which is electrically connected to the temperature measuring element and the encoder lead-out line 30. The bottom of the casing is provided with a base foot 16.

[0028] It is worth noting that the magnetic steel 4 is annular, and the inner hole of the magnetic steel 4 is fixed to the magnetic yoke 5 connected to the motor shaft 8 by magnetic steel glue, which makes assembly simpler and more efficient.

[0029] It is worth noting that the stator core 7 adopts sector-shaped segments, which divide the whole circle into six equal parts of stator sector segments 7-1. Stator slots 7-2 are evenly distributed on each stator sector segment 7-1. The arc edge of each stator sector segment 7-1 is provided with a buckle slot 7-3. The two ends of the stator sector segment 7-1 are respectively provided with a dovetail slot 7-4 and a convex dovetail 7-5. The dovetail slot 7-4 and the convex dovetail 7-5 are matched with each other. The six stator sectors 7-1 are formed into a whole circle by buckling the adjacent dovetail slots 7-4 and the convex dovetail 7-5. The angle between adjacent cleat slots 7-3 on the stator sector 7-1 is 24°. The cleat slots 7-3 are designed to be distributed at 24°. When stacking, the six stator sectors 7-1 of the next layer form a whole circle. The starting piece is rotated 24°, and the stator slot shape and cleat slot shape of the whole circle composed of the six stator sectors 7-1 of the previous layer are respectively overlapped. However, the joints of the six sectors in the previous layer and the joints of the six sectors in the next layer are rotated 24°. The sectors of the previous layer just cover the joints of the next layer, forming a layer-by-layer pressure to prevent the sectors from warping.

[0030] In addition, the stator core 7 is made into a stator core with skew slots by skew keys. The stator core is skewed by a stator tooth pitch, which can effectively eliminate tooth harmonics, improve the generator voltage waveform and reduce the cogging torque.

[0031] The winding wound on the stator core 7 of this embodiment adopts a winding structure that combines two-thirds short-distance lap winding and concentric winding, and adopts three-layer coils to form a three-phase symmetrical winding, which improves the utilization rate of the stator slot 7-2. The voltage waveform of the generator is a sine wave, with small voltage harmonics and good voltage waveform. This embodiment is a 2-pole high-speed generator. Figure 6 The stator with 30 slots can be designed as a single-phase generator or a three-phase generator: for a single-phase motor, each pole occupies 14 slots and 1 slot is empty, that is, 28 slots have coils and 2 slots have no coils; for a three-phase motor, three-phase winding, 30 slots, 2P, three-layer winding, each pole and each phase still occupies 14 slots and 1 slot is empty, that is, for a three-phase motor, 24 slots are three-layer wires and 6 slots are two-layer wires. Figure 7 、 Figure 8 , Figure 7 is the three-phase winding diagram, Figure 8 This is the winding diagram for phase A in a three-phase winding. The large coil is a series of six overlapping coils, while the small coil is a series of concentric windings. The six large coils and one small coil are also connected in a series. The large coils start with A1, B6, and C26, and the small coils are: (2-4) C; (7-9) A; (12-14) B; (17-19) z; (22-24) x; and (27-29) y.

[0032] This specific embodiment is an AC generator composed of a magnetic ring permanent magnet and its drive, which can convert mechanical energy into electrical energy. It consists of three major parts: a stator, a magnetic ring magnetic steel rotor and a casing end cover. The stator is provided with an iron core, and multiple groups of insulated copper wires are wound around the iron core. The copper wires are wound to form a stator winding; the magnetic ring magnetic steel rotor is provided with permanent magnets and a low-carbon steel magnetic yoke for supporting the permanent magnets. The permanent magnets generate a magnetic field and are made of a material with strong magnetism, such as neodymium iron boron, samarium cobalt and other magnets. The magnetic yoke 5 is in close contact with the magnetic steel baffle 6. Under the action of the magnetic field, when the rotor speed suddenly changes or the load fluctuates, the magnetic yoke 5 will generate eddy currents in the iron core yoke, which plays a damping role in the AC generator with an exciter; the casing is an outer shell used to protect the stator and rotor, and can also be used for heat dissipation. When permanent magnets are stationary, they generate a constant magnetic field. The rotor rotates into the magnetic field area. The rotor is the part connected to the generator power source, such as the crankshaft in a diesel engine. When the rotor rotates in the magnetic field, the magnetic flux of the magnetic field is changing. This changing magnetic field excites the stator winding wire to induce an electric potential. When the winding is connected to a closed circuit, current is generated, thereby generating electricity.

[0033] The generator of this embodiment has stable power output, low energy consumption and low noise, and can be used in high-efficiency generators such as wind turbines and hydroelectric generators. Its technical advantages are:

[0034] (1) The structure is simple. The damping system is formed by the magnetic yoke and the magnetic steel baffle. The magnetic yoke is equivalent to countless damping strips, and the magnetic steel baffle is equivalent to the damping end plate. It replaces the traditional complex damping strip and baffle damping system. It is both a structural component and a simple to use damping functional component. It eliminates the complex damping strips and damping end rings and does not require welding, which saves materials, reduces costs and manufacturing expenses, and greatly enhances reliability because there is no welding.

[0035] (2) The magnetic yoke fits tightly with the magnetic steel baffle. Under the action of the magnetic field of the magnetic steel, eddy currents are induced in the rotor yoke and form a closed state through the magnetic steel aluminum baffle, which is equivalent to a damping winding. This plays a damping role in suppressing the oscillation of the generator terminal voltage when the generator is suddenly loaded or unloaded, and stabilizing the generator terminal voltage when the rotor speed changes suddenly. The power output is stable and the reliability is high.

[0036] (3) The magnet is designed into a circular ring shape, which effectively prevents the magnet from flying out due to high-speed rotation. At the same time, the inner hole of the magnet is fixed to the motor shaft with magnetic glue, eliminating the need for tooling assembly when bonding traditional surface-mounted magnets, improving assembly efficiency and safety, and greatly improving reliability. In addition, the outer diameter and concentricity of the magnet ring are guaranteed by machining precision, and the uniformity of the motor air gap is guaranteed, thus overcoming the problems of uneven air gap and high vibration noise of traditional surface-mounted magnets.

[0037] (4) The stator core punching sheet adopts sector-shaped sheet, which divides the whole round sheet into six equal parts, reduces the size of the punching die, and greatly reduces the manufacturing cost. Since the rotor magnetic ring is directly glued to the magnetic low-carbon steel shaft, there is no need for rotor core punching sheet, which saves the more expensive core punching sheet. At the same time, the stator sheet becomes a one-sixth circular arc sheet, which makes the material utilization rate of the stator sector sheet more than 20% higher than that of the whole round sheet, and the cost of the whole machine is greatly reduced.

[0038] (5) Low energy consumption and high efficiency: The generator uses permanent magnets to generate magnetic lines of force and form a magnetic field. Since there is no excitation winding and no excitation loss, the efficiency is high. The magnetic field will form a current loop inside the permanent magnet, thereby enabling the rotor to rotate. The energy consumption of the rotor is relatively low at low power.

[0039] (6) When the permanent magnet generator is working, it adopts a winding structure that combines skew slots and two-thirds short-pitch stacked windings with concentric windings. At the same time, it uses three layers of coils to form a three-phase symmetrical winding. The utilization rate of the stator slots is high, the magnetic field harmonics are small, and therefore the noise is low.

[0040] This specific embodiment can be used as a backup power supply for various mobile mechanical equipment, and can be widely used in battery power systems, industrial control systems, new energy automobile industry, backup power supplies, mobile power supplies, wind turbines, hydroelectric generators and other fields, and has broad market application prospects.

[0041] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. Magnetic ring type high speed non-damping bar power frequency generator, characterized by: The invention comprises a front end cover (1), a rear end cover (2), a winding stator (3), a magnetic steel (4), a magnetic yoke (5), a magnetic steel baffle (6), a stator core (7), a motor shaft (8), a front bearing (9), a rear bearing (10), a water cooling base (11), an outlet box (12), an encoder stator (13), an encoder rotor (14), an encoder socket (15), and a foot (16). The generator housing composed of the front end cover (1) and the rear end cover (2) is provided with a winding stator (3). The stator is provided with a stator core (7). The stator core (7) adopts a sector-shaped sheet. The winding stator (3) is provided with a stator slot (7-2). The stator slot (7-2) is provided with three layers of coils. The inner diameter of the stator is formed by the stator. The front bearing (9) of the front end cover (1) and the rear bearing (10) of the rear end cover (2) are connected to the rotor, and a magnet (4), a magnetic yoke (5), and a magnetic baffle (6) are installed on the rotor shaft. The magnet (4) is set to a surface-mounted magnetic ring type. The surface-mounted magnetic ring and the magnetic yoke (5) are fitted with the magnetic baffle (6) through the magnetic baffle fastening bolts (17). The magnet (4) adopts a segmented magnetic ring type. The inner circle of the magnetic yoke (5) is provided with a keyway, which is connected and positioned with the motor shaft (8) through the key. The end of the motor shaft (8) extends out of the front end cover (1) to form an axis extension; the front and rear ends of the motor shaft (8) are respectively installed with a front bearing (9) and a rear bearing (10), and the front bearing (9) and the motor shaft ( An oil seal (18) is provided at the connection of the front bearing (9), the bearing inner cover (19) on the inner side of the front bearing (9) is fixed to the front end cover (1) by the inner cover fastening screw (20), the encoder stator (13) is installed at the inner hole behind the rear end cover (2) of the motor, the encoder rotor (14) is installed at the rear end of the motor shaft (8), the encoder stator (13) and the encoder rotor (14) are provided with an encoder cover (21) on the periphery, the encoder stator (13) is fixed through the stator pressure plate (23) by the pressure plate fastening screw (22), and the encoder rotor (14) is fixed by the rotor fastening screw (24); a water cooling base (11) is installed between the front end cover (1) and the rear end cover (2) by the end cover fastening bolt (25) A terminal box (12) is provided on the top of the water-cooling machine base (11), and a lead-out power line (27) is provided on the surface of the terminal box (12) through a lead-out screw sleeve (26). The lead-out power line (27) is connected to the stator winding end (29) of the winding stator (3) through a lead-out line (28). An encoder socket (15) is also installed on the side of the terminal box (12), and the encoder socket (15) is electrically connected to the temperature measuring element and the encoder lead-out line (30). A foot (16) is installed at the bottom of the casing; the winding wound on the stator core (7) adopts a winding structure combining a two-thirds short-distance stacked winding and a concentric winding, and adopts a three-layer coil to form a three-phase symmetrical winding, thereby improving the utilization rate of the stator slot (7-2).

2. The magnetic ring type high-speed power frequency generator without damping strip according to claim 1, characterized in that: The magnetic steel (4) is annular, and the inner hole of the magnetic steel (4) is fixed to the magnetic yoke (5) connected to the motor shaft (8) by means of magnetic steel glue.

3. The magnetic ring type high-speed power frequency generator without damping strip according to claim 1, characterized in that: The stator core (7) adopts a sector-shaped piece, and the whole circular piece is divided into six equal parts of stator sector-shaped pieces (7-1). Stator slots (7-2) are evenly distributed on each stator sector-shaped piece (7-1). The arc edge of each stator sector-shaped piece (7-1) is provided with a buckle slot (7-3). The two ends of the stator sector-shaped piece (7-1) are respectively provided with a dovetail slot (7-4) and a convex dovetail (7-5). The dovetail slot (7-4) and the convex dovetail (7-5) match each other. The six stator sector-shaped pieces (7-1) are formed into a whole circular piece by buckling the dovetail slots (7-4) and the convex dovetail (7-5) adjacent to each other at the head and tail.

4. The magnetic ring type high-speed power frequency generator without damping strip according to claim 3, characterized in that: The angle between adjacent buckle slots (7-3) on the stator sector (7-1) is 24 degrees. When stacking, the six stator sector (7-1) of the next layer is rotated 24 degrees at the beginning, and the stator slot shape and buckle slot shape of the whole circular piece composed of the six stator sector (7-1) of the previous layer are respectively overlapped. The joints of the six sectors of the previous layer and the six sectors of the next layer are rotated 24 degrees. The sectors of the previous layer just cover the joints of the next layer, forming a layer-by-layer pressure to prevent the sectors from warping.

5. The magnetic ring type high-speed power frequency generator without damping strip according to claim 1, characterized in that: The stator core (7) is made into a stator core with skew slots by means of skew keys. The stator core is skewed by a stator tooth pitch, which can effectively eliminate tooth harmonics and reduce cogging torque.

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