Starting system of integrated split type high-speed motor

Abstract

The invention provides an integrated split type high-speed motor starting system, and relates to the technical field of power generation devices, the integrated split type high-speed motor starting system comprises a gas turbine and a high-speed motor, the gas turbine is started and generates power through the high-speed motor, the gas turbine comprises a machine base and a rotating shaft, and the high-speed motor comprises a rotor assembly and a stator assembly; the rotor assembly comprises a rotor iron core, a permanent magnet ring body with a plurality of magnetic pole parts and a non-magnetic sheath which are sequentially arranged on the rotating shaft in a sleeving manner, so that the rotating speed of the high-speed motor is 50000-120000 revolutions per minute, and by means of the arrangement, the phenomenon that when the high-speed generator is operated, centrifugal force is generated when the rotor iron core rotates at a high speed, and the rotating speed of the high-speed generator is influenced can be avoided. The high-speed motor provided by the invention overcomes the defects that the permanent magnet and the non-magnetic wedge block are easy to loosen and the sharp corners of the permanent magnet and the non-magnetic wedge block are easy to generate stress concentration, and meanwhile, the high-speed motor provided by the invention can also be used as a generator to generate power, so that the whole power generation system is simple and reliable, and the power generation cost of the power generation system is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of power generation devices, and in particular to a starting system of an integrated sub-assembly type high-speed motor. Background Art

[0002] The micro gas turbine power generation system consists of a micro gas turbine, an electric starting subsystem, a high-speed generator, a power generation control subsystem and an auxiliary subsystem. The electric starting subsystem consists of a gas turbine control subsystem, a starter motor, a gearbox and a motor controller. When starting the micro gas turbine, the gas turbine control subsystem first issues a command to the motor controller, so that the motor controller supplies power to the starter motor from the external power supply. The micro gas turbine is started by controlling the torque size and direction of the starter motor. When the micro gas turbine reaches a certain speed, the starter motor is disengaged, and then the micro gas turbine drives the high-speed generator to generate electricity. The generated electricity is output as a stable and appropriate power supply through the power generation control system.

[0003] At present, the high-speed generator is composed of a stator assembly, a rotor assembly, a base, front and rear end covers and bearings. The rotor assembly includes four bread-shaped permanent magnets, a rotor core, four non-magnetic wedges and a non-magnetic sheath; please refer to the instruction manual for details. Figure 9-10 As shown, the rotor core is arranged in a rectangular shape, and four bread-shaped permanent magnets are arranged along the four end faces of the rotor core, and a non-magnetic wedge is spliced ​​between every two adjacent bread-shaped permanent magnets. Finally, the rotor core, the bread-shaped permanent magnets and the non-magnetic wedges are clamped by a non-magnetic sheath, so that the outer surface of the bread-shaped permanent magnet, the outer surface of the non-magnetic wedge and the inner surface of the non-magnetic sheath are tightly fixed as a whole, wherein two of the four bread-shaped permanent magnets have N poles, and the other two bread-shaped permanent magnets have S poles.

[0004] However, a non-magnetic sheath is used to clamp the rotor core, the bread-shaped permanent magnet and the non-magnetic wedge, so that there is a gap between the bread-shaped permanent magnet and the non-magnetic wedge. When the high-speed generator is running, the centrifugal force generated by the high-speed rotation of the rotor core makes it easy for the permanent magnet and the non-magnetic wedge to loosen, and stress concentration is easy to occur at the sharp corners of the permanent magnet and the non-magnetic wedge. To ensure the normal operation of the high-speed generator, the speed of the high-speed generator can only be controlled below 30,000 rpm, and the high-speed generator at this speed can only be used for power generation, but not for driving, resulting in the micro gas turbine having to be started by a starter motor when starting, thereby increasing the cost of power generation. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a starting system for an integrated and separately assembled high-speed motor to solve the technical problem that the existing high-speed generator in the background technology can only control the speed of the high-speed generator below 30,000 rpm due to the structural limitation of the rotor assembly during operation, and the high-speed generator at this speed can only be used for power generation but not for driving, resulting in the micro gas turbine needing to be started by a starting motor when starting, thereby increasing the cost of power generation.

[0006] On one hand, the present invention provides a starting system of an integrated sub-assembly type high-speed motor, comprising a gas turbine and a high-speed motor, wherein the gas turbine is started and generates electricity through the high-speed motor, and the gas turbine comprises a base and a rotating shaft;

[0007] The high-speed motor comprises a rotor assembly for mounting on the rotating shaft and a stator assembly for mounting on the machine base, wherein the rotor assembly comprises a rotor core, a permanent magnetic ring body having a plurality of magnetic poles, and a non-magnetic sheath, wherein the rotor core, the permanent magnetic ring body, and the non-magnetic sheath are sequentially sleeved on the rotating shaft, so that the non-magnetic sheath is in interference connection with the permanent magnetic ring body, the permanent magnetic ring body is in interference connection with the rotor core, and the rotor core is in interference connection with the rotating shaft;

[0008] Among them, the cross-sections of the rotor core, the permanent magnet ring body and the non-magnetic sleeve are all annular, and the magnetic pole portion in the permanent magnet ring body includes two N-pole portions and two S-pole portions, the N-pole portions and the S-pole portions are arranged alternately, and each N-pole portion is arranged opposite to another N-pole portion, and each S-pole portion is arranged opposite to another S-pole portion, so that the rotation speed of the high-speed motor is 50,000 rpm-120,000 rpm.

[0009] Furthermore, the rotor core is made of iron-cobalt-vanadium soft magnetic alloy material or silicon steel sheet material.

[0010] Furthermore, the permanent magnetic ring body is made of permanent magnetic material.

[0011] Furthermore, the non-magnetic sheath is made of high-strength titanium alloy material.

[0012] Further, the stator assembly includes a stator core, a plurality of stator windings and a plurality of insulating members;

[0013] Wherein, the stator core is provided with a plurality of accommodating slots, which are arranged on the stator core at intervals with the center of the stator core as the origin, and each stator winding is arranged in each slot through each insulating member.

[0014] Furthermore, each of the accommodating slots has at least one other accommodating slot disposed opposite thereto.

[0015] Further, the stator winding comprises an upper stator winding portion and a lower stator winding portion;

[0016] The upper stator winding portion and the lower stator winding portion are separated by a portion of the insulating member.

[0017] Further, the insulating member includes an insulating ring portion and an insulating partition portion;

[0018] The insulating ring part surrounds the outer periphery of the upper stator winding part and the lower stator winding part to separate the upper stator winding part and the lower stator winding part from the inner wall of the accommodating tank body;

[0019] The insulating partition is provided between the upper layer winding portion and the lower layer stator winding portion to separate the upper layer winding portion and the lower layer stator winding portion.

[0020] Furthermore, the high-speed motor also includes at least two balance rings, wherein one balance ring is sleeved on one end of the rotating shaft, and the other balance ring is sleeved on the other end of the rotating shaft.

[0021] Further, the rotor assembly includes a first balance ring and a second balance ring, and the first balance ring and the second balance ring are respectively arranged at opposite ends of the rotating shaft;

[0022] Wherein, the cross sections of the first balance ring and the second balance ring are both ring-shaped.

[0023] Compared with the prior art: the starting system of an integrated sub-assembly high-speed motor proposed in the present invention, by setting a permanent magnet ring body with multiple magnetic pole parts in the rotor assembly of the present application, the permanent magnet ring body can replace the traditional method of using four bread-shaped permanent magnets, that is, the permanent magnet ring body is integrally formed, and the two N pole parts and the two S pole parts on the permanent magnet ring body are consistent with the two bread-shaped permanent magnets in the prior art, that is, the magnetic poles are N poles and the other two bread-shaped permanent magnets are S poles. Therefore, when the high-speed generator is running, the centrifugal force generated by the rotor core during high-speed rotation makes it easy for the permanent magnet and the non-magnetic wedge to loosen, and the sharp corners of the permanent magnet and the non-magnetic wedge to concentrate stress, thereby improving the high-speed resistance reliability of the rotor assembly. At the same time, in the present application The high-speed motor has a high speed of 50,000 rpm-120,000 rpm. According to the reversibility principle of the motor, the integration of the motor and the generator is realized, that is, in the entire power generation system, the high-speed motor in the present application can be used as both a starting motor and a generator. During the starting process of the micro gas turbine, the motor controller in the power generation system supplies power to drive the high-speed motor. The high-speed motor acts as a starting motor to drag the gas turbine at the initial start-up of the gas turbine and provides torque to the gas turbine. After the gas turbine operates normally, the high-speed motor can operate as a generator to generate electricity and supply power to the power supply system, making the entire power generation system simple and reliable, that is, a high-speed motor can be used to start and generate electricity for the gas turbine, greatly reducing the power generation cost of the power generation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a high-speed motor in one embodiment of the present invention;

[0025] Figure 2 is a side view of a high-speed motor in one embodiment of the present invention;

[0026] Figure 3 It is a structural schematic diagram of a stator assembly in one embodiment of the present invention;

[0027] Figure 4 for Figure 3 A magnified schematic diagram of part A;

[0028] Figure 5 is a schematic diagram of a stator core in one embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection of the stator winding in one embodiment of the present invention;

[0030] Figure 7 It is a structural schematic diagram of a rotor assembly in one embodiment of the present invention;

[0031] Figure 8 It is a structural schematic diagram of a permanent magnetic ring body in one embodiment of the present invention;

[0032] Fig. 9 It is a structural schematic diagram of a stator core in the prior art;

[0033] Fig.10 It is a schematic diagram of the structure of a rotor assembly in the prior art.

[0034] illustrate:

[0035] 100, rotating shaft; 200, stator assembly; 210, stator core; 220, stator winding; 221, upper stator winding portion; 222, lower stator winding portion; 230, insulating member; 231, insulating ring portion; 232, insulating partition portion; 240, containing slot body; 300, rotor assembly; 310, rotor core; 320, permanent magnet ring body; 321, N-pole portion; 322, S-pole portion; 330, non-magnetic sheath; 400, first balance ring; 500, second balance ring; 600, bread-shaped permanent magnet; 700, non-magnetic wedge.

[0036] The following specific implementations will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0040] See also Figure 9-10As shown, it is a schematic diagram of the structure of the rotor assembly 300 in the prior art high-speed generator. Specifically, the rotor assembly 300 includes four bread-shaped permanent magnets 600, a rotor core 310, four non-magnetic wedges 700 and a non-magnetic sheath 330. The rotor core 310 is arranged in a rectangular shape. The four bread-shaped permanent magnets 600 are arranged along the four end faces of the rotor core 310, and a non-magnetic wedge 700 is spliced ​​between every two adjacent bread-shaped permanent magnets 600. Finally, the rotor core 310, the bread-shaped permanent magnets 600 and the non-magnetic wedges 700 are clamped by the non-magnetic sheath 330, so that the outer surface of the bread-shaped permanent magnet 600, the outer surface of the non-magnetic wedge 700 and the inner surface of the non-magnetic sheath 330 are tightly fixed as a whole. Among the four bread-shaped permanent magnets 600, two bread-shaped permanent magnets 600 have N poles, and the other two bread-shaped permanent magnets 600 have S poles.

[0041] Example

[0042] See also Figure 1-Figure 8 , shown is a starting system of an integrated sub-assembled high-speed motor in one embodiment of the present invention, in order to solve the technical problem that in the prior art, the high-speed generator can only control the speed of the high-speed generator below 30,000 rpm during operation due to the structural limitation of the rotor assembly 300, and the high-speed generator at this speed can only be used for power generation but not for driving, resulting in the micro gas turbine needing to be started by a starting motor when starting, thereby increasing the power generation cost, the starting system of this embodiment includes a gas turbine and a high-speed motor, and the gas turbine is started and generates electricity by the high-speed motor. It should be noted that in some actual situations, the power generation system also includes other subsystems such as a power generation control subsystem and an auxiliary subsystem. Since the other subsystems belong to the conventional prior art in this field, they are not specifically explained here.

[0043] The gas turbine includes a base and a rotating shaft 100. It should be noted that the base and the rotating shaft 100 are part of the components of the gas turbine. The gas turbine also has other components. Since the other components belong to the conventional existing technology in this field, they are not specifically explained here.

[0044] Specifically, in this embodiment, the high-speed motor includes a rotor assembly 300 for mounting on a rotating shaft 100 and a stator assembly 200 for mounting on a machine base, the rotor assembly 300 includes a rotor core 310, a permanent magnetic ring body 320 having a plurality of magnetic poles, and a non-magnetic sheath 330, the rotor core 310, the permanent magnetic ring body 320, and the non-magnetic sheath 330 are sequentially sleeved on the rotating shaft 100, so that the non-magnetic sheath 330 is interference-connected with the permanent magnetic ring body 320, the permanent magnetic ring body 320 is interference-connected with the rotor core 310, and the rotor core 310 is interference-connected with the rotating shaft 100;

[0045] Among them, the cross-sections of the rotor core 310, the permanent magnet ring body 320 and the non-magnetic sheath 330 are all annular, and the magnetic pole portion in the permanent magnet ring body 320 includes two N-pole portions 321 and two S-pole portions 322. The N-pole portions 321 and the S-pole portions 322 are arranged alternately, and each N-pole portion 321 is arranged opposite to another N-pole portion 321, and each S-pole portion 322 is arranged opposite to another S-pole portion 322, so that the rotation speed of the high-speed motor is 50,000 rpm-120,000 rpm.

[0046] That is to say, the permanent magnet ring body 320 with multiple magnetic poles in this embodiment is used to replace the traditional method of using four bread-shaped permanent magnets 600, that is, the permanent magnet ring body 320 is integrally formed, and the two N-pole parts 321 and the two S-pole parts 322 on the permanent magnet ring body 320 are consistent with the magnetic poles of the two bread-shaped permanent magnets 600 in the prior art, and the other two bread-shaped permanent magnets 600 are S-poles, and the N-pole parts 321 and the S-pole parts 322 in this embodiment are staggered, and each N-pole part 321 is arranged opposite to another N-pole part 321, and each S-pole part 322 is arranged opposite to another S-pole part 322, so that when the high-speed generator is running, the centrifugal force generated by the rotor core 310 when rotating at high speed, which makes it easy for the permanent magnet and the non-magnetic wedge 700 to loosen, and the sharp corners of the permanent magnet and the non-magnetic wedge 700 are easy to be loosened. The disadvantage of stress concentration is generated, and the reliability of the rotor assembly 300 in resisting high speed is improved. At the same time, the high-speed motor in this embodiment has a high speed of 50,000 rpm-120,000 rpm. According to the principle of reversibility of the motor, the integration of the motor and the generator is realized, that is, in the entire power generation system, the high-speed motor in this application can be used as both a starting motor and a generator. During the starting process of the micro gas turbine, the motor controller in the power generation system supplies power to drive the high-speed motor. The high-speed motor acts as a starting motor to drag the gas turbine at the initial start-up of the gas turbine and provides torque to the gas turbine. After the gas turbine operates normally, the high-speed motor can operate as a generator to generate electricity and supply power to the power supply system, making the entire power generation system simple and reliable, that is, a high-speed motor can be used to start and generate electricity for the gas turbine, greatly reducing the power generation cost of the power generation system.

[0047] In addition, it should be noted that, in this embodiment, the rotor core 310 is made of iron-cobalt-vanadium soft magnetic alloy material or silicon steel sheet material, the permanent magnet ring body 320 is made of permanent magnet material, and the non-magnetic sheath 330 is made of high-strength titanium alloy material, and in some preferred embodiments, the rotor core 310, the permanent magnet ring body 320 and the non-magnetic sheath 330 are all ring-shaped.

[0048] Furthermore, the stator assembly 200 includes a stator core 210, a plurality of stator windings 220 and a plurality of insulating members 230, wherein a plurality of receiving slots 240 are provided on the stator core 210, and the plurality of receiving slots 240 are arranged on the stator core 210 at intervals with the center of the stator core 210 as the origin, and each stator winding 220 is respectively arranged in each slot through each insulating member 230. In some preferred embodiments, each receiving slot 240 has at least another receiving slot 240 arranged opposite thereto.

[0049] It should be noted that the stator winding 220 includes an upper stator winding portion 221 and a lower stator winding portion 222, and the upper stator winding portion 221 and the lower stator winding portion 222 are separated by a partial insulating member 230. Specifically, the insulating member 230 includes an insulating ring portion 231 and an insulating partition portion 232, wherein the insulating ring portion 231 surrounds the outer periphery of the upper stator winding portion 221 and the lower stator winding portion 222 to separate the upper stator winding portion 221 and the lower stator winding portion 222 from the inner wall of the accommodating slot 240, and the insulating partition portion 232 is arranged between the upper stator winding portion and the lower stator winding portion 222 to separate the upper stator winding portion and the lower stator winding portion 222.

[0050] The example is not limiting, and 18 receiving slots 240 are provided on the stator core 210, and the stator core 210 can be made of an iron-cobalt-vanadium soft magnetic alloy material to increase the magnetic induction intensity, while also reducing the weight of the high-speed motor and reducing the loss of the stator core 210 at high frequencies.

[0051] To ensure the stability of the rotating shaft 100 during operation, the high-speed motor in this embodiment also includes at least two balance rings, wherein one balance ring is sleeved on one end of the rotating shaft 100, and the other balance ring is sleeved on the other end of the rotating shaft 100. The example is not limiting. The two balance rings can be a first balance ring 400 and a second balance ring 500, and the first balance ring 400 and the second balance ring 500 are respectively arranged at opposite ends of the rotating shaft 100, wherein the cross-sections of the first balance ring 400 and the second balance ring 500 are both annular, and the first balance ring 400 and the second balance ring 500 are used to improve the balance and stability of the rotating shaft 100 during high-speed operation.

[0052] In summary, the first embodiment of the present invention provides an integrated sub-assembly type high-speed motor starting system. By setting a permanent magnet ring body 320 with multiple magnetic poles in the rotor assembly 300 of the present application, the permanent magnet ring body 320 can replace the traditional method of using four bread-shaped permanent magnets 600, that is, the permanent magnet ring body 320 is integrally formed, and the two N-pole parts 321 and the two S-pole parts 322 on the permanent magnet ring body 320 are consistent with the two bread-shaped permanent magnets 600 in the prior art, in which the magnetic poles are N poles and the other two bread-shaped permanent magnets 600 are S poles. In addition, the N-pole parts 321 and the S-pole parts 322 in the present application are staggered, and each N-pole part 321 is arranged opposite to another N-pole part 321, and each S-pole part 322 is arranged opposite to another S-pole part 322, thereby avoiding the centrifugal force generated by the rotor core 310 when rotating at high speed during the operation of the high-speed generator, which makes it easy for the permanent magnet and the non-magnetic wedge 700 to generate friction. The drawbacks of looseness and stress concentration at the sharp corners of the permanent magnet and the non-magnetic wedge block 700 are improved, and the reliability of the rotor assembly 300 in resisting high speed is improved. At the same time, the high-speed motor in the present application has a high speed of 50,000 rpm-120,000 rpm. According to the principle of reversibility of the motor, the integration of the motor and the generator is realized, that is, in the entire power generation system, the high-speed motor in the present application can be used as both a starting motor and a generator. During the starting process of the micro gas turbine, the motor controller in the power generation system supplies power to drive the high-speed motor. The high-speed motor acts as a starting motor to drag the gas turbine at the initial start-up of the gas turbine and provides torque to the gas turbine. After the gas turbine operates normally, the high-speed motor can operate as a generator to generate electricity and supply power to the power supply system, making the entire power generation system simple and reliable, that is, a high-speed motor can be used to start and generate electricity for the gas turbine, greatly reducing the power generation cost of the power generation system.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0054] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A starting system for an integrated high-speed motor, characterized in that: It includes a gas turbine and a high-speed motor, wherein the gas turbine is started and generates electricity through the high-speed motor, and the gas turbine includes a base and a rotating shaft; The high-speed motor comprises a rotor assembly for mounting on the rotating shaft and a stator assembly for mounting on the machine base, wherein the rotor assembly comprises a rotor core, a permanent magnetic ring body having a plurality of magnetic poles, and a non-magnetic sheath, wherein the rotor core, the permanent magnetic ring body, and the non-magnetic sheath are sequentially sleeved on the rotating shaft, so that the non-magnetic sheath is in interference connection with the permanent magnetic ring body, the permanent magnetic ring body is in interference connection with the rotor core, and the rotor core is in interference connection with the rotating shaft; Among them, the cross-sections of the rotor core, the permanent magnet ring body and the non-magnetic sleeve are all annular, and the magnetic pole portion in the permanent magnet ring body includes two N-pole portions and two S-pole portions, the N-pole portions and the S-pole portions are arranged alternately, and each N-pole portion is arranged opposite to another N-pole portion, and each S-pole portion is arranged opposite to another S-pole portion, so that the rotation speed of the high-speed motor is 50,000 rpm-120,000 rpm.

2. The integrated sub-assembly type high-speed motor starting system according to claim 1 is characterized in that: The rotor core is made of iron-cobalt-vanadium soft magnetic alloy material or silicon steel sheet material.

3. The integrated sub-assembly type high-speed motor starting system according to claim 1, characterized in that: The permanent magnetic ring body is made of permanent magnetic material.

4. The integrated sub-assembly high-speed motor starting system according to claim 1, characterized in that: The non-magnetic sheath is made of high-strength titanium alloy material.

5. The integrated sub-assembly type high-speed motor starting system according to claim 1, characterized in that: The stator assembly includes a stator core, a plurality of stator windings and a plurality of insulating members; Wherein, the stator core is provided with a plurality of accommodating slots, which are arranged on the stator core at intervals with the center of the stator core as the origin, and each stator winding is arranged in each slot through each insulating member.

6. The integrated sub-assembly type high-speed motor starting system according to claim 5, characterized in that: Each of the accommodating slots has at least one other accommodating slot disposed opposite thereto.

7. The integrated sub-assembly type high-speed motor starting system according to claim 5, characterized in that: The stator winding comprises an upper stator winding portion and a lower stator winding portion; The upper stator winding portion and the lower stator winding portion are separated by a portion of the insulating member.

8. The integrated sub-assembly type high-speed motor starting system according to claim 7, characterized in that: The insulating member comprises an insulating ring portion and an insulating partition portion; The insulating ring part surrounds the outer periphery of the upper stator winding part and the lower stator winding part to separate the upper stator winding part and the lower stator winding part from the inner wall of the accommodating tank body; The insulating partition is provided between the upper layer winding portion and the lower layer stator winding portion to separate the upper layer winding portion and the lower layer stator winding portion.

9. The integrated sub-assembly type high-speed motor starting system according to claim 1, characterized in that: The high-speed motor further comprises at least two balancing rings, wherein one balancing ring is sleeved on one end of the rotating shaft, and the other balancing ring is sleeved on the other end of the rotating shaft.

10. The integrated sub-assembly type high-speed motor starting system according to claim 9, characterized in that: The rotor assembly comprises a first balancing ring and a second balancing ring, wherein the first balancing ring and the second balancing ring are respectively arranged at two opposite ends of the rotating shaft; Wherein, the cross sections of the first balance ring and the second balance ring are both ring-shaped.

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