A method for connecting a generator rotor and a generator rotor winding

Abstract

The embodiment of the present invention provides a generator rotor and a generator rotor winding connection method, which relates to the technical field of generator rotors. The generator rotor includes a rotor body and a conductor, and the rotor body is provided with N wire slots at intervals along its own circumference. Each wire slot includes a first embedding position and a second embedding position arranged along the circumference of the rotor body, and the first embedding position and the second embedding position are both embedded with two layers of conductors arranged at intervals along the radial direction of the rotor body. All conductors together form a conductor group, and the head-to-tail crossover range of the lead end of the conductor group adopts a wave winding 5n / 6 short-distance connection, and the head-to-tail crossover range of the non-lead end of the conductor group adopts a wave winding n+2 connection. The generator rotor increases the open-circuit voltage through the structure of the conductor in each wire slot, and controls the grid-connected speed range to 965-2035rpm through the winding connection method, thereby achieving the generator rotor while increasing the open-circuit voltage without reducing the range requirement of the grid-connected speed.

Description

Technical Field

[0001] The present invention relates to the technical field of generator rotors, and in particular to a generator rotor and a method for connecting a generator rotor winding. Background Art

[0002] The doubly-fed wind turbine generator is a variable speed constant frequency generator. When operating normally, in order to ensure that the generator stator outputs a constant frequency and constant voltage voltage, it is necessary to use a converter to adjust the amplitude and phase of the current in the three-phase winding of the motor rotor.

[0003] In order to reduce the temperature of the converter connected to the rotor end, the motor rotor open-circuit voltage is generally increased and the normal operating current of the rotor winding is reduced while ensuring that the converter capacity remains unchanged.

[0004] The increase of the existing open circuit voltage is generally achieved by increasing the effective series winding turns ratio of the rotor and stator. When the magnetic flux remains unchanged and the number of connected windings increases, the open circuit voltage will inevitably increase, and after exceeding a certain limit, the speed range of the generator set will become smaller. Summary of the invention

[0005] The objects of the present invention include, for example, providing a generator rotor and a generator rotor winding connection method, which can increase the open circuit voltage without reducing the grid-connected speed range of the generator.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, this embodiment provides a generator rotor, comprising a rotor body and a conductor, wherein the rotor body is provided with N wire slots at intervals along its circumferential direction, each of the wire slots comprises a first embedding position and a second embedding position arranged along the circumferential direction of the rotor body, and the first embedding position and the second embedding position are both embedded with two layers of conductors spaced apart along the radial direction of the rotor body;

[0008] All the conductors together form a conductor group, the lead end of the conductor group is connected by a wave winding 5n / 6 short distance, and the non-lead end of the conductor group is connected by a wave winding n+2.

[0009] Wherein, n=N / P, n is the pitch of the generator rotor, and P is the number of motor poles.

[0010] In an optional embodiment, at the lead end, the lower conductor of the first embedded position of the first wire slot and the lower conductor of the first embedded position of the n+1th wire slot serve together as an external wiring port of the A-phase winding;

[0011] The upper conductor of the second embedded position of the n+2th wire slot is short-circuited with the lead-out line of the upper conductor of the second embedded position of the 2n+2th wire slot.

[0012] In an optional embodiment, at the lead end, from the lower conductor of the second embedded position of the 1st wire slot to the lower conductor of the second embedded position of the n / 3rd wire slot, are connected one-to-one with the upper conductor of the first embedded position of the 5n / 6+1th wire slot to the upper conductor of the first embedded position of the 7n / 6th wire slot;

[0013] The lower conductor of the second embedded position of the n+1th slot to the lower conductor of the second embedded position of the 4n / 3th slot are connected one by one with the upper conductor of the first embedded position of the 11n / 6+1th slot to the upper conductor of the first embedded position of the 13n / 6th slot;

[0014] The lower conductor of the first embedded position of the 2n+1th slot to the lower conductor of the second embedded position of the 7n / 3th slot are connected one by one with the upper conductor of the first embedded position of the 17n / 6+1th slot to the upper conductor of the second embedded position of the 19n / 6th slot;

[0015] The lower conductor at the first embedded position of the 3n+1th line slot to the lower conductor at the second embedded position of the 10n / 3th line slot are connected one-to-one with the upper conductor at the first embedded position of the 23n / 6+1th line slot to the upper conductor at the second embedded position of the 2nd line slot.

[0016] In an optional embodiment, at the non-lead end, from the upper conductor of the first embedded position of the 3n-1th wire slot to the upper conductor of the second embedded position of the 3n+2th wire slot, the lower conductor of the first embedded position of the 1st wire slot to the lower conductor of the second embedded position of the n / 3th wire slot are connected one by one;

[0017] The upper conductor of the first embedded position of the 4n-1th line slot to the upper conductor of the second embedded position of the 2nd line slot are connected one by one with the lower conductor of the first embedded position of the n+1th line slot to the lower conductor of the second embedded position of the 4n / 3th line slot;

[0018] The upper conductor of the first embedded position of the n-1th slot to the upper conductor of the second embedded position of the 4n / 3-2th slot are connected one by one with the lower conductor of the first embedded position of the 2n+1th slot to the lower conductor of the second embedded position of the 7n / 3th slot;

[0019] The upper conductor of the first embedded position of the 2n-1th line slot to the upper conductor of the second embedded position of the 2n+2th line slot are connected one-to-one with the lower conductor of the first embedded position of the 3n+1th line slot to the lower conductor of the second embedded position of the 10n / 3th line slot.

[0020] In an optional embodiment, at the lead end, the lower conductor of the first embedded position of the 4n / 3+1th wire slot and the lower conductor of the first embedded position of the 7n / 3+1th wire slot jointly serve as an external wiring port of the B-phase winding;

[0021] The upper conductor of the second embedded position of the 7n / 3+2th wire slot and the lead-out line of the upper conductor of the second embedded position of the 10n / 3+2th wire slot are short-circuited.

[0022] In an optional embodiment, at the lead end, from the lower conductor of the first embedded position of the n / 3+1th wire slot to the lower conductor of the second embedded position of the 2n / 3th wire slot, the upper conductor of the first embedded position of the 7n / 6+1th wire slot to the upper conductor of the second embedded position of the 9n / 6th wire slot are connected one by one;

[0023] The lower conductor of the second embedded position of the 4n / 3+1th slot to the lower conductor of the second embedded position of the 5n / 3th slot are connected one by one with the upper conductor of the first embedded position of the 13n / 6+1th slot to the upper conductor of the first embedded position of the 15n / 6th slot;

[0024] The lower conductor of the second embedded position of the 7n / 3+1th slot to the lower conductor of the second embedded position of the 8n / 3th slot are connected one by one with the upper conductor of the first embedded position of the 19n / 6+1th slot to the upper conductor of the first embedded position of the 21n / 6th slot;

[0025] The lower conductor at the first embedded position of the 10n / 3+1th line slot to the lower conductor at the second embedded position of the 11n / 3th line slot are connected one-to-one with the upper conductor at the first embedded position of the n / 3-1th line slot to the upper conductor at the second embedded position of the n / 3+2th line slot.

[0026] In an optional embodiment, at the non-lead end, from the upper conductor of the first embedded position of the 10n / 3-1th wire slot to the upper conductor of the second embedded position of the 10n / 3+2th wire slot, the lower conductor of the first embedded position of the n / 3+1th wire slot to the lower conductor of the second embedded position of the 2n / 3th wire slot are connected one by one;

[0027] The upper conductor of the first embedded position of the n / 3-1th slot to the upper conductor of the second embedded position of the n / 3+2th slot are connected one by one with the lower conductor of the first embedded position of the 4n / 3+1th slot to the lower conductor of the second embedded position of the 5n / 3th slot;

[0028] The upper conductor of the first embedded position of the 4n / 3-1th slot to the upper conductor of the second embedded position of the 4n / 3+2th slot are connected one by one with the lower conductor of the first embedded position of the 7n / 3+1th slot to the lower conductor of the second embedded position of the 8n / 3th slot;

[0029] The upper conductor of the first embedded position of the 7n / 3-1th line slot to the upper conductor of the second embedded position of the 7n / 3+2th line slot are connected one by one with the lower conductor of the first embedded position of the 10n / 3+1th line slot to the lower conductor of the second embedded position of the 11n / 3th line slot.

[0030] In an optional embodiment, at the lead end, the lower conductor of the first embedded position of the 8n / 3+1th wire slot and the lower conductor of the first embedded position of the 11n / 3+1th wire slot jointly serve as an external wiring port of the C-phase winding;

[0031] The upper conductor of the second embedded position of the 2n / 3+2th wire slot and the lead-out line of the upper conductor of the second embedded position of the 11n / 3+2th wire slot are short-circuited.

[0032] In an optional embodiment, at the lead end, from the lower conductor of the second embedded position of the 8n / 3+1th wire slot to the lower conductor of the second embedded position of the 3nth wire slot, are connected one-to-one with the upper conductor of the first embedded position of the 21n / 6+1th wire slot to the upper conductor of the first embedded position of the 23n / 6th wire slot;

[0033] The lower conductor of the second embedded position of the 23n / 6-1 line slot to the lower conductor of the second embedded position of the 4n line slot are connected one by one with the upper conductor of the first embedded position of the 2n / 3-1 line slot to the upper conductor of the first embedded position of the 5n / 6 line slot;

[0034] The lower conductor of the first embedded position of the 2n / 3+1th slot to the lower conductor of the second embedded position of the nth slot are connected one by one with the upper conductor of the first embedded position of the 9n / 6+1th slot to the upper conductor of the second embedded position of the 11n / 6th slot;

[0035] The lower conductor at the first embedded position of the 5n / 3+1th line slot to the lower conductor at the second embedded position of the 2nth line slot are connected one-to-one with the upper conductor at the first embedded position of the 15n / 6+1th line slot to the upper conductor at the second embedded position of the 17n / 6th line slot.

[0036] In an optional embodiment, at the non-lead end, from the upper conductor of the first embedded position of the 11n / 3-1th wire slot to the upper conductor of the second embedded position of the 4n-2th wire slot, the lower conductor of the first embedded position of the 2n / 3+1th wire slot to the lower conductor of the second embedded position of the nth wire slot are connected one by one;

[0037] Connect the upper conductor of the first embedded position of the 2n / 3-1th slot to the upper conductor of the second embedded position of the 2n / 3+2th slot in a one-to-one correspondence with the lower conductor of the first embedded position of the 5n / 3+1th slot to the lower conductor of the second embedded position of the 2nth slot;

[0038] The upper conductor of the first embedded position of the 5n / 3-1th slot to the upper conductor of the second embedded position of the 5n / 3+2th slot are connected one by one with the lower conductor of the first embedded position of the 8n / 3+1th slot to the lower conductor of the second embedded position of the 3nth slot;

[0039] The upper conductor of the first embedded position of the 8n / 3-1th line slot to the upper conductor of the second embedded position of the 8n / 3+2th line slot are connected one-to-one with the lower conductor of the first embedded position of the 11n / 3+1th line slot to the lower conductor of the second embedded position of the 4nth line slot.

[0040] In an optional embodiment, the wire groove includes a groove body and a groove opening, and the groove opening includes a convex portion corresponding to the first embedding position and a concave portion corresponding to the second embedding position, and the protruding direction of the convex portion and the concave direction of the concave portion are the same, so that the width dimension of the groove opening is smaller than the width dimension of the groove body.

[0041] In an optional embodiment, an inter-row insulating member is provided between the conductor of the first embedded position and the conductor of the second embedded position, and an inter-layer insulating member is provided between the upper and lower layers of conductors of the first embedded position and the second embedded position.

[0042] In a second aspect, an embodiment provides a method for connecting a generator rotor winding, comprising the following steps:

[0043] Wire embedding step: two layers of conductors are embedded in the first embedding position and the second embedding position of each wire slot, and all the conductors together form a conductor group;

[0044] Winding connection steps: the lead end of the conductor group is connected by a wave winding 5n / 6 short distance method, and the non-lead end of the conductor group is connected by a wave winding n+2 method;

[0045] Wherein, n is the pitch of the generator rotor.

[0046] The beneficial effects of the embodiments of the present invention include, for example:

[0047] By setting a first embedding position and a second embedding position in each wire slot of the rotor body, and embedding two layers of conductors in the first embedding position and the second embedding position, four conductors are arranged in each wire slot, and the conductors are arranged in two rows and two layers, thereby increasing the open circuit voltage.

[0048] The head-to-tail jumper range of the lead end of the conductor group adopts a wave winding 5n / 6 short-distance connection, and the head-to-tail jumper range of the non-lead end adopts a wave winding n+2 connection method (when n=12, the lead end short-distance 10 connection, and the non-lead end span is 14), and when the open circuit voltage is 2100V, the maximum absolute value of the stator voltage allowed by the motor is 750V, and the absolute value of the rotor slip rate is S=750 / 2100=0.357.

[0049] The allowable fluctuation speed of the rotor is n1 = S × n0 = 0.357 × 1500 = 535 rpm, where n0 is the synchronous speed of the four-stage motor, 1500 rpm.

[0050] Then, the minimum allowable rotor speed n=n0-n1=965rpm; the maximum allowable rotor speed n=n0+n1=2035rpm.

[0051] Therefore, when the stator voltage is not greater than 750V, the grid-connected speed range is 965-2035rpm. This achieves the requirement that the generator rotor increases the open-circuit voltage without reducing the grid-connected speed (1000-2000rpm). BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0053] Figure 1 A schematic diagram of a portion of the structure in which conductors are arranged in the wire slots of the rotor body of the generator rotor provided in an embodiment of the present application;

[0054] Figure 2A schematic diagram of a portion of the structure of a rotor body in a generator rotor provided in an embodiment of the present application;

[0055] Figure 3 A schematic diagram of the structure of the winding connection in the generator rotor provided in an embodiment of the present application;

[0056] Figure 4 A schematic diagram of the connection structure of the A-phase winding, the B-phase winding and the C-phase winding in the generator rotor provided in an embodiment of the present application;

[0057] Figure 5 A schematic diagram of the connection of the A-phase winding in the generator rotor provided in an embodiment of the present application;

[0058] Figure 6 A schematic diagram of the connection of the B-phase winding in the generator rotor provided in an embodiment of the present application;

[0059] Figure 7 A schematic diagram of the connection of the C-phase winding in the generator rotor provided in an embodiment of the present application.

[0060] Icon: 100-rotor body; 01-lead end; 02-non-lead end; 10-wire slot; 12-first embedding position; 14-second embedding position; 20-conductor; 21-inter-row insulating member; 22-inter-layer insulating member; 23-convex part; 25-concave part; 26-A phase winding; 27-B phase winding; 28-C phase winding. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0062] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0063] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0064] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0065] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0066] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0067] An embodiment of the present application provides a generator rotor, which includes opposite lead ends and non-lead ends.

[0068] Among them, the head-to-tail jumper range of the lead end adopts a wave winding 5n / 6 short-distance connection, and the head-to-tail jumper range of the non-lead end adopts a wave winding n+2 connection.

[0069] Existing generators, such as double-fed wind turbines, are variable speed constant frequency generators. In normal operation, in order to ensure that the generator stator outputs a constant frequency and constant voltage voltage, it is necessary to use a converter to adjust the amplitude and phase of the current in the three-phase winding of the motor rotor.

[0070] Therefore, when designing the rotor of a doubly-fed generator, in order to reduce the temperature of the converter connected to the rotor end, the open-circuit voltage of the motor rotor is generally increased while ensuring that the converter capacity remains unchanged, and the normal operating current of the rotor winding is reduced, thereby reducing the heat generated by the converter. In addition, it is necessary to ensure that the grid-connected speed range of the four-pole generator of 1000-2000rpm is not reduced while increasing the open-circuit voltage to solve the problem of mechanical imbalance of the short-pitch rotor.

[0071] However, the increase in the existing open circuit voltage is generally achieved by increasing the effective series winding turns ratio of the rotor and stator. Since the stator end of the doubly fed generator is connected to a grid with a constant voltage, according to the law of electromagnetic induction, when the stator parameters of the motor are determined, the magnetic flux per pole of the air gap is also determined. According to the real and virtual slot method commonly used in the existing related technology, that is, the number of conductors per slot is an even number of 2, and the full-pitch winding is used to increase the open circuit voltage. When the magnetic flux remains unchanged and the number of connected windings increases, the open circuit voltage will inevitably increase. When the open circuit voltage exceeds a certain limit, the speed range of the generator set will become smaller.

[0072] The generator rotor provided in the embodiment of the present application can increase the open circuit voltage (Uopen needs to be no greater than 2100V) without reducing the grid-connected speed of the generator.

[0073] Figure 1 A schematic diagram of a portion of the structure in which conductors are arranged in the wire slots of the rotor body of the generator rotor provided in an embodiment of the present application, Figure 2 For a partial structural diagram of the rotor body in the generator rotor provided in the embodiment of the present application, please refer to Figure 1 and Figure 2 shown.

[0074] The generator rotor includes a rotor body 100 and a conductor 20 .

[0075] The rotor body 100 is provided with N wire slots 10 at intervals along its circumferential direction. Each wire slot 10 includes a first embedding position 12 and a second embedding position 14 arranged along the circumferential direction of the rotor body 100. Two layers of conductors 20 are embedded in the first embedding position 12 and the second embedding position 14 at intervals along the radial direction of the rotor body 100, which are an upper conductor near the slot opening and a lower conductor at the bottom of the slot.

[0076] That is to say, four conductors 20 are placed in each wire slot 10, arranged in two columns, each column is provided with two layers, that is, the first embedding position 12 and the second embedding position 14 are provided with two layers of conductors 20. The wave winding 5n / 6 short distance connection is adopted through the head-to-tail crossover range of the lead end, and the wave winding n+2 connection is adopted through the head-to-tail crossover range of the non-lead end. Thus, the open circuit voltage is increased without reducing the range of the grid-connected speed.

[0077] The winding connection structure of the generator rotor provided in this embodiment is described in detail below.

[0078] Figure 3 For a schematic diagram of the structure of the winding connection in the generator rotor provided in the embodiment of the present application, please refer to Figure 1 , Figure 2 and Figure 3 shown.

[0079] The conductor group formed by all the conductors 20 includes a lead end 01 and a non-lead end 02 that are opposite to each other.

[0080] The generator rotor provided in the embodiment of the present application changes the existing end-to-end crossover range of the conductor 20 from the full-pitch connection of the rotor wave winding to: the end-to-end crossover range of the non-lead end 02 adopts the wave winding n+2 connection; the end-to-end crossover range of the lead end 01 adopts the wave winding 5n / 6 short-pitch connection.

[0081] Where n = N / P;

[0082] n is the pitch of the generator rotor, N is the number of wire slots 10 provided on the rotor body 100, and P is the number of motor poles.

[0083] Furthermore, an inter-row insulator 21 is provided between the conductor of the first embedding position 12 and the conductor of the second embedding position 14 in each wire slot 10 of the generator rotor, so that the conductor 20 on the first embedding position 12 and the conductor 20 on the second embedding position 14 are insulated and spaced. An inter-layer insulator 22 is provided between the upper and lower layers of conductors 20 of the first embedding position 12 and the second embedding position 14, so that the upper conductor and the lower conductor on each embedding position are insulated and spaced.

[0084] Please continue to refer to Figure 1 and Figure 2 As shown, each wire duct 10 has the same structure and size and includes a duct body and a duct opening.

[0085] The tank body is a slender rectangular structure. Figure 1 From the perspective, the first embedding position 12 is located on the left side of each slot body, and the second embedding position 14 is located on the right side of the slot body.

[0086] The slot includes a convex portion 23 corresponding to the first embedding position 12, and a concave portion 25 corresponding to the second embedding position 14. The protruding direction of the convex portion 23 is the same as the concave direction of the concave portion 25, so that the width of the slot is smaller than the width of the slot body. That is, the slot is designed as a semi-open structure. The wire slot 10 of the generator rotor provided in the embodiment of the present application adopts a semi-open structure, which can better eliminate the air gap tooth harmonics caused by the open slot.

[0087] It can be understood that, in other optional embodiments, the first embedding position 12 corresponds to the concave portion 25 , and the second embedding position 14 corresponds to the convex portion 23 .

[0088] From the basic structure of the generator rotor, it can be seen that the wire slots 10 opened on the rotor body 100 are evenly spaced along the circumference of the rotor body 100, and the structure, size and weight of the conductor 20 embedded in each wire slot 10 are the same, so as to reduce the imbalance problem caused by the operation of the generator rotor.

[0089] The winding connection method of the generator rotor provided in the embodiment of the present application is described in detail with N slots.

[0090] First, 4N conductors are placed in the N wire slots of the rotor body 100 , and two layers of conductors are placed in the first embedding position 12 on the left side and the second embedding position 14 on the right side of each wire slot, that is, a total of four conductors are placed in each wire slot.

[0091] An inter-row insulating member 21 is disposed between the conductor 20 of the first embedding position 12 and the conductor 20 of the second embedding position 14 , and an inter-layer insulating member 22 is disposed between the upper and lower layers of conductors to ensure mutual insulation between two adjacent conductors.

[0092] After the conductors are placed, the lead ends 01 and non-lead ends 02 at opposite ends of the generator rotor are connected by windings. The connection principle is: the lead end 01 includes an A-phase winding 26, a B-phase winding 27 and a C-phase winding 28 respectively.

[0093] Figure 4 For a schematic diagram of the connection structure of the A-phase winding 26, the B-phase winding 27 and the C-phase winding 28 in the generator rotor provided in the embodiment of the present application, please refer to Figure 4 shown.

[0094] The connection mode of the A-phase winding 26 is as follows: the lower conductor of the first embedded position of the first wire slot and the lower conductor of the first embedded position of the n+1 wire slot are used as the external connection port of the A-phase winding 26. The upper conductor of the second embedded position of the n+2 wire slot and the upper conductor of the second embedded position of the 2n+2 wire slot are short-circuited.

[0095] The connection mode of the B-phase winding 27 is as follows: the lower conductor of the first embedded position of the 4n / 3+1th wire slot and the lower conductor of the first embedded position of the 7n / 3+1th wire slot are used as the external connection port of the B-phase winding 27. The upper conductor of the second embedded position of the 7n / 3+2th wire slot and the upper conductor of the second embedded position of the 10n / 3+2th wire slot are short-circuited.

[0096] The connection mode of the C-phase winding 28 is as follows: the lower conductor of the first embedded position of the 8n / 3+1th wire slot and the lower conductor of the first embedded position of the 11n / 3+1th wire slot are used as the external connection port of the C-phase winding 28. The upper conductor of the second embedded position of the 2n / 3+2th wire slot and the lead wire of the upper conductor of the second embedded position of the 11n / 3+2th wire slot are short-circuited.

[0097] The winding connection method of the lead ends of all conductors in N wire slots is:

[0098] Figure 5 A schematic diagram of the connection of the A-phase winding in the generator rotor provided in an embodiment of the present application, Figure 6 A schematic diagram of the connection of the B-phase winding in the generator rotor provided in an embodiment of the present application, Figure 7 For the wiring diagram of the C-phase winding in the generator rotor provided in the embodiment of the present application, please refer to Figure 5 , Figure 6 and Figure 7 shown.

[0099] The lead terminals of the A-phase winding 26 are connected: from the lower conductor of the second embedded position of the 1st slot to the lower conductor of the second embedded position of the n / 3rd slot, they are connected one-to-one with the upper conductor of the first embedded position of the 5n / 6+1th slot to the upper conductor of the first embedded position of the 7n / 6th slot. From the lower conductor of the second embedded position of the n+1th slot to the lower conductor of the second embedded position of the 4n / 3rd slot, they are connected one-to-one with the upper conductor of the first embedded position of the 11n / 6+1th slot to the upper conductor of the first embedded position of the 13n / 6th slot. From the lower conductor of the first embedded position of the 2n+1th line slot to the lower conductor of the second embedded position of the 7n / 3th line slot, they are connected one-to-one with the upper conductors of the 17n / 6+1th line slot to the 19n / 6th line slot; from the lower conductor of the first embedded position of the 3n+1th line slot to the lower conductor of the second embedded position of the 10n / 3th line slot, they are connected one-to-one with the upper conductor of the first embedded position of the 23n / 6+1th line slot to the upper conductor of the second embedded position of the 2nd line slot.

[0100] The lead terminals of the B-phase winding 27 are connected: from the lower conductor of the first embedded position of the n / 3+1th slot to the lower conductor of the second embedded position of the 2n / 3th slot, they are connected one-to-one with the upper conductor of the first embedded position of the 7n / 6+1th slot to the upper conductor of the second embedded position of the 9n / 6th slot. From the lower conductor of the second embedded position of the 4n / 3+1th slot to the lower conductor of the second embedded position of the 5n / 3th slot, they are connected one-to-one with the upper conductor of the first embedded position of the 13n / 6+1th slot to the upper conductor of the first embedded position of the 15n / 6th slot. From the lower conductor of the second embedded position of the 7n / 3+1th slot to the lower conductor of the second embedded position of the 8n / 3th slot, they are connected one-to-one with the upper conductor of the first embedded position of the 19n / 6+1th slot to the upper conductor of the first embedded position of the 21n / 6th slot. The lower conductor at the first embedding position of the 10n / 3+1th slot to the lower conductor at the second embedding position of the 11n / 3th slot are connected one by one with the upper conductor at the first embedding position of the n / 3-1th slot to the upper conductor at the second embedding position of the n / 3+2th slot.

[0101] The lead terminal of the C-phase winding 28 is connected: from the lower conductor of the second embedded position of the 8n / 3+1th slot to the lower conductor of the second embedded position of the 3nth slot, they are connected one by one with the upper conductor of the first embedded position of the 21n / 6+1th slot to the upper conductor of the first embedded position of the 23n / 6th slot. From the lower conductor of the second embedded position of the 23n / 6-1th slot to the lower conductor of the second embedded position of the 4nth slot, they are connected one by one with the upper conductor of the first embedded position of the 2n / 3-1th slot to the upper conductor of the first embedded position of the 5n / 6th slot. From the lower conductor of the first embedded position of the 2n / 3+1th slot to the lower conductor of the second embedded position of the nth slot, they are connected one by one with the upper conductor of the first embedded position of the 9n / 6+1th slot to the upper conductor of the second embedded position of the 11n / 6th slot. The lower conductor at the first embedding position of the 5n / 3+1th slot to the lower conductor at the second embedding position of the 2nth slot are connected one by one with the upper conductor at the first embedding position of the 15n / 6+1th slot to the upper conductor at the second embedding position of the 17n / 6th slot.

[0102] The winding connection method of the non-lead end 02 of all conductors in N wire slots is:

[0103] Please continue to refer to Figure 5 , Figure 6 and Figure 7 As shown, the non-lead end 02 of the A-phase winding 26 is connected: from the upper conductor of the first embedded position of the 3n-1th slot to the upper conductor of the second embedded position of the 3n+2th slot, it is connected one-to-one with the lower conductor of the first embedded position of the 1st slot to the lower conductor of the second embedded position of the n / 3th slot. From the upper conductor of the first embedded position of the 4n-1th slot to the upper conductor of the second embedded position of the 2nd slot, it is connected one-to-one with the lower conductor of the first embedded position of the n+1th slot to the lower conductor of the second embedded position of the 4n / 3th slot. From the upper conductor of the first embedded position of the n-1th slot to the upper conductor of the second embedded position of the 4n / 3-2th slot, it is connected one-to-one with the lower conductor of the first embedded position of the 2n+1th slot to the lower conductor of the second embedded position of the 7n / 3th slot. The upper conductor of the first embedded position of the 2n-1th line slot to the upper conductor of the second embedded position of the 2n+2th line slot are connected one by one with the lower conductor of the first embedded position of the 3n+1th line slot to the lower conductor of the second embedded position of the 10n / 3th line slot.

[0104] The non-lead end 02 of the B-phase winding 27 is connected: from the upper conductor of the first embedded position of the 10n / 3-1th slot to the upper conductor of the second embedded position of the 10n / 3+2th slot, it is connected one-to-one with the lower conductor of the first embedded position of the n / 3+1th slot to the lower conductor of the second embedded position of the 2n / 3th slot. From the upper conductor of the first embedded position of the n / 3-1th slot to the upper conductor of the second embedded position of the n / 3+2th slot, it is connected one-to-one with the lower conductor of the first embedded position of the 4n / 3+1th slot to the lower conductor of the second embedded position of the 5n / 3th slot. From the upper conductor of the first embedded position of the 4n / 3-1th slot to the upper conductor of the second embedded position of the 4n / 3+2th slot, it is connected one-to-one with the lower conductor of the first embedded position of the 7n / 3+1th slot to the lower conductor of the second embedded position of the 8n / 3th slot. The upper conductor at the first embedding position of the 7n / 3-1th slot to the upper conductor at the second embedding position of the 7n / 3+2th slot are connected one by one with the lower conductor at the first embedding position of the 10n / 3+1th slot to the lower conductor at the second embedding position of the 11n / 3th slot.

[0105] The non-lead end 02 of the C phase winding 28 is connected: from the upper conductor of the first embedded position of the 11n / 3-1 slot to the upper conductor of the second embedded position of the 4n-2 slot, it is connected one-to-one with the lower conductor of the first embedded position of the 2n / 3+1 slot to the lower conductor of the second embedded position of the n slot. From the upper conductor of the first embedded position of the 2n / 3-1 slot to the upper conductor of the second embedded position of the 2n / 3+2 slot, it is connected one-to-one with the lower conductor of the first embedded position of the 5n / 3+1 slot to the lower conductor of the second embedded position of the 2n slot. From the upper conductor of the first embedded position of the 5n / 3-1 slot to the upper conductor of the second embedded position of the 5n / 3+2 slot, it is connected one-to-one with the lower conductor of the first embedded position of the 8n / 3+1 slot to the lower conductor of the second embedded position of the 3n slot. The upper conductor at the first embedding position of the 8n / 3-1th slot to the upper conductor at the second embedding position of the 8n / 3+2th slot are connected one-to-one with the lower conductor at the first embedding position of the 11n / 3+1th slot to the lower conductor at the second embedding position of the 4nth slot.

[0106] The generator rotor provided in the embodiment of the present application has four conductors arranged in each slot, and the conductors are arranged in two rows and two layers to increase the open circuit voltage.

[0107] The lead end of the conductor group adopts a wave winding 5n / 6 short-distance connection, and the non-lead end adopts a wave winding n+2 connection mode. For example, when n=12, the lead end is connected in a short distance of 10, and the non-lead end is connected in a span of 14. When the open circuit voltage is 2100V, the maximum absolute value of the stator voltage allowed by the motor is 750V, and the absolute value of the rotor slip rate allowed is S=750 / 2100=0.357.

[0108] The rotor's allowable fluctuating speed is n1 = S × n0 = 0.357 × 1500 = 535 rpm, where n0 = 1500 rpm, which is the synchronous speed of the four-stage motor.

[0109] Then, the minimum allowable rotor speed n = n0-n1 = 1500-535 = 965 rpm; the maximum allowable rotor speed n = n0+n1 = 1500+535 = 2035 rpm.

[0110] Therefore, when the stator voltage is not greater than 750V, the grid-connected speed ranges from 965 to 2035rpm, thereby achieving the requirement that the generator rotor increases the open-circuit voltage without reducing the grid-connected speed (1000-2000rpm).

[0111] In summary, the above conductor placement structure and winding connection method can increase the open circuit voltage and control the open circuit voltage within a range of no more than 2100 V. When the generator stator voltage is no more than 750 V, the grid-connected speed range is 965-2035 rpm, which is wider than the speed range of 1000-2000 rpm, thereby achieving the goal of increasing the open circuit voltage of the generator rotor without reducing the grid-connected speed range.

[0112] The following is a detailed description by taking a four-pole motor in which the rotor body 100 is provided with 48 slots spaced apart along its circumference as an example.

[0113] First, conductors 20 are placed in the 48 slots of the rotor body 100 , respectively. Two rows of conductors 20 are placed in each slot, and each row includes two layers of conductors 20 .

[0114] The pitch of the generator rotor is n=N / P=48 / 4=12.

[0115] Then, determine the specific position of the first wire slot and connect all windings in a clockwise direction. The specific winding connection method is as follows.

[0116] Please continue to refer to Figure 4 and Figure 5 As shown, the connection mode of the A-phase winding 26 is:

[0117] The wiring method of the external wiring port of the A-phase winding 26 at the lead end 01 is as follows: the lead wires of the lower conductor of the first embedded position of the 1st wire slot and the lower conductor of the first embedded position of the 13th wire slot are used as the external wiring port of the A-phase winding 26. The lead wires of the upper conductor of the second embedded position of the 14th wire slot and the upper conductor of the second embedded position of the 26th wire slot are short-circuited.

[0118] At lead end 01: connect the lower conductor of the second embedding position of the 1st wire slot to the lower conductor of the second embedding position of the 4th wire slot to the upper conductor of the first embedding position of the 11th wire slot to the upper conductor of the first embedding position of the 14th wire slot in a one-to-one correspondence. Connect the lower conductor of the second embedding position of the 13th wire slot to the lower conductor of the second embedding position of the 16th wire slot to the upper conductor of the first embedding position of the 23rd wire slot to the upper conductor of the first embedding position of the 26th wire slot in a one-to-one correspondence. Connect the lower conductor of the first embedding position of the 25th wire slot to the lower conductor of the second embedding position of the 28th wire slot to the upper conductor of the first embedding position of the 35th wire slot to the upper conductor of the second embedding position of the 38th wire slot in a one-to-one correspondence. The lower conductor of the first embedded position of the 37th wire slot to the lower conductor of the second embedded position of the 40th wire slot are connected one by one with the upper conductor of the first embedded position of the 47th wire slot to the upper conductor of the second embedded position of the 2nd wire slot.

[0119] At the non-lead end 02: the upper conductor of the first embedded position of the 35th wire slot to the upper conductor of the second embedded position of the 38th wire slot are connected one by one with the lower conductor of the first embedded position of the 1st wire slot to the lower conductor of the second embedded position of the 4th wire slot. The upper conductor of the first embedded position of the 47th wire slot to the upper conductor of the second embedded position of the 2nd wire slot are connected one by one with the lower conductor of the first embedded position of the 13th wire slot to the lower conductor of the second embedded position of the 16th wire slot. The upper conductor of the first embedded position of the 11th wire slot to the upper conductor of the second embedded position of the 14th wire slot are connected one by one with the lower conductor of the first embedded position of the 25th wire slot to the lower conductor of the second embedded position of the 28th wire slot. The upper conductor of the first embedded position of the 23rd wire slot to the upper conductor of the second embedded position of the 26th wire slot are connected one by one with the lower conductor of the first embedded position of the 37th wire slot to the lower conductor of the second embedded position of the 40th wire slot.

[0120] Please continue to refer to Figure 4 and Figure 6 As shown, the connection mode of the B phase winding 27 is:

[0121] The wiring method of the external wiring port of the B-phase winding 27 at the lead end 01 is as follows: the lead wires of the lower conductor of the first embedded position of the 17th wire slot and the lower conductor of the first embedded position of the 29th wire slot are used as the external wiring port of the B-phase winding 27. The lead wires of the upper conductor of the second embedded position of the 30th wire slot and the upper conductor of the second embedded position of the 42nd wire slot are short-circuited.

[0122] At lead end 01: connect the lower conductor of the first embedded position of the 5th wire slot to the lower conductor of the second embedded position of the 8th wire slot one by one with the upper conductor of the first embedded position of the 15th wire slot to the upper conductor of the second embedded position of the 18th wire slot. Connect the lower conductor of the second embedded position of the 17th wire slot to the lower conductor of the second embedded position of the 20th wire slot to the upper conductor of the first embedded position of the 27th wire slot to the upper conductor of the first embedded position of the 30th wire slot one by one. Connect the lower conductor of the second embedded position of the 29th wire slot to the lower conductor of the second embedded position of the 32nd wire slot to the upper conductor of the first embedded position of the 39th wire slot to the upper conductor of the first embedded position of the 42nd wire slot one by one. The lower conductor of the first embedding position of the 41st wire slot to the lower conductor of the second embedding position of the 44th wire slot are connected one by one with the upper conductor of the first embedding position of the 3rd wire slot to the upper conductor of the second embedding position of the 6th wire slot.

[0123] At the non-lead end 02: the upper conductor of the first embedded position of the 39th wire slot to the upper conductor of the second embedded position of the 42nd wire slot are connected one by one with the lower conductor of the first embedded position of the 5th wire slot to the lower conductor of the second embedded position of the 8th wire slot. The upper conductor of the first embedded position of the 3rd wire slot to the upper conductor of the second embedded position of the 6th wire slot are connected one by one with the lower conductor of the first embedded position of the 17th wire slot to the lower conductor of the second embedded position of the 20th wire slot. The upper conductor of the first embedded position of the 15th wire slot to the upper conductor of the second embedded position of the 18th wire slot are connected one by one with the lower conductor of the first embedded position of the 29th wire slot to the lower conductor of the second embedded position of the 32nd wire slot. The upper conductor of the first embedded position of the 27th wire slot to the upper conductor of the second embedded position of the 30th wire slot are connected one by one with the lower conductor of the first embedded position of the 41st wire slot to the lower conductor of the second embedded position of the 44th wire slot.

[0124] Please continue to refer to Figure 4 and Figure 7 As shown, the connection mode of the C phase winding 28 is:

[0125] The wiring method of the external wiring port of the C-phase winding 28 at the lead end 01 is as follows: the lead wires of the lower conductor of the first embedded position of the 33rd wire slot and the lower conductor of the first embedded position of the 45th wire slot are used as the external wiring port of the C-phase winding 28, and the lead wires of the upper conductor of the second embedded position of the 10th wire slot and the upper conductor of the second embedded position of the 46th wire slot are short-circuited.

[0126] At lead end 01: connect the lower conductor of the second embedded position of the 33rd slot to the lower conductor of the second embedded position of the 36th slot one by one with the upper conductor of the first embedded position of the 43rd slot to the upper conductor of the first embedded position of the 46th slot. Connect the lower conductor of the second embedded position of the 45th slot to the lower conductor of the second embedded position of the 48th slot to the upper conductor of the first embedded position of the 7th slot to the upper conductor of the first embedded position of the 10th slot one by one. Connect the lower conductor of the first embedded position of the 9th slot to the lower conductor of the second embedded position of the 12th slot to the upper conductor of the first embedded position of the 19th slot to the upper conductor of the second embedded position of the 22nd slot one by one. The lower conductor of the first embedded position of the 21st wire slot to the lower conductor of the second embedded position of the 24th wire slot are connected one by one with the upper conductor of the first embedded position of the 31st wire slot to the upper conductor of the second embedded position of the 34th wire slot.

[0127] At the non-lead end 02: the upper conductor of the first embedded position of the 43rd line slot to the upper conductor of the second embedded position of the 46th line slot are connected one by one with the lower conductor of the first embedded position of the 9th line slot to the lower conductor of the second embedded position of the 12th line slot. The upper conductor of the first embedded position of the 7th line slot to the upper conductor of the second embedded position of the 10th line slot are connected one by one with the lower conductor of the first embedded position of the 21st line slot to the lower conductor of the second embedded position of the 24th line slot. The upper conductor of the first embedded position of the 19th line slot to the upper conductor of the second embedded position of the 22nd line slot are connected one by one with the lower conductor of the first embedded position of the 33rd line slot to the lower conductor of the second embedded position of the 36th line slot. The upper conductor of the first embedded position of the 31st wire slot to the upper conductor of the second embedded position of the 34th wire slot are connected one by one with the lower conductor of the first embedded position of the 45th wire slot to the lower conductor of the second embedded position of the 48th wire slot.

[0128] The generator rotor winding connection method provided in the embodiment of the present application comprises the following steps:

[0129] Wire embedding step: two layers of conductors 20 are embedded in the first embedding position and the second embedding position of each wire slot, and all the conductors 20 together form a conductor group.

[0130] Winding connection steps: The lead end 01 of the conductor group is connected by wave winding 5n / 6 short distance method, and the non-lead end 02 of the conductor group is connected by wave winding n+2 method;

[0131] Wherein, n is the pitch of the generator rotor.

[0132] In summary, the generator rotor structure and winding connection method provided in the embodiment of the present application achieve the requirement of increasing the open circuit voltage without reducing the grid-connected speed range of 1000-2000rpm, and the grid-connected speed range is 965-2035rpm. In addition, the non-lead terminal 02 adopts a wiring method of n+2 span and the lead terminal 01 adopts a wiring method of 5n / 6 short distance, which realizes uniform distribution of windings and the same short wiring, so as to solve the problem of mechanical imbalance of the generator rotor.

[0133] The generator rotor and generator rotor winding connection method provided in the embodiment of the present application have the following beneficial effects: by arranging four conductors 20 in each wire slot 10, and the conductors 20 are arranged in two rows and two layers, the open circuit voltage is improved; the wave winding n+2 method is adopted in the head-to-tail crossover range of the non-lead end 02, and the wave winding 5n / 6 short-distance method is adopted in the head-to-tail crossover range of the lead end 01, so that the open circuit voltage is controlled to be no more than 2100V, and when the stator voltage is no more than 750V, the grid-connected speed range can meet the requirement of 1000-2000rpm, thereby achieving the goal of meeting the grid-connected speed range while improving the open circuit voltage; by adopting the wave winding n+2 method in the head-to-tail crossover range of the non-lead end 02 of the conductor group, and adopting the wave winding 5n / 6 short-distance method in the head-to-tail crossover range of the lead end 01, the winding lead wires and short-distance wires can be the same and evenly distributed, so as to solve the problem of mechanical imbalance; in addition, by designing the slot mouth of the wire slot as a semi-open structure, the air gap tooth harmonics caused by the open slot can be eliminated as much as possible.

[0134] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A generator rotor, characterized in that: The invention comprises a rotor body and a conductor, wherein the rotor body is provided with N wire slots at intervals along its circumferential direction, each of the wire slots comprises a first embedding position and a second embedding position arranged along the circumferential direction of the rotor body, and the first embedding position and the second embedding position are both embedded with two layers of conductors at intervals along the radial direction of the rotor body; All the conductors together form a conductor group, the lead end of the conductor group is connected by a wave winding 5n / 6 short distance, and the non-lead end of the conductor group is connected by a wave winding n+2. Wherein, n = N / P, n is the pitch of the generator rotor, P is the number of motor poles; The wire trough comprises a trough body and a trough opening, and the trough body is a rectangular structure.

2. The generator rotor according to claim 1, characterized in that: At the lead end, the lower conductor of the first embedded position of the first wire slot and the lower conductor of the first embedded position of the n+1th wire slot together serve as an external connection port of the A-phase winding; The upper conductor of the second embedded position of the n+2th wire slot is short-circuited with the lead-out line of the upper conductor of the second embedded position of the 2n+2th wire slot.

3. The generator rotor according to claim 2, characterized in that: At the lead end, from the lower conductor of the second embedded position of the 1st wire slot to the lower conductor of the second embedded position of the n / 3rd wire slot, they are connected one by one with the upper conductor of the first embedded position of the 5n / 6+1th wire slot to the upper conductor of the first embedded position of the 7n / 6th wire slot; The lower conductor of the second embedded position of the n+1th slot to the lower conductor of the second embedded position of the 4n / 3th slot are connected one by one with the upper conductor of the first embedded position of the 11n / 6+1th slot to the upper conductor of the first embedded position of the 13n / 6th slot; The lower conductor of the first embedded position of the 2n+1th slot to the lower conductor of the second embedded position of the 7n / 3th slot are connected one by one with the upper conductor of the first embedded position of the 17n / 6+1th slot to the upper conductor of the second embedded position of the 19n / 6th slot; The lower conductor at the first embedded position of the 3n+1th line slot to the lower conductor at the second embedded position of the 10n / 3th line slot are connected one-to-one with the upper conductor at the first embedded position of the 23n / 6+1th line slot to the upper conductor at the second embedded position of the 2nd line slot.

4. The generator rotor according to claim 2, characterized in that: At the non-lead end, from the upper conductor of the first embedded position of the 3n-1th wire slot to the upper conductor of the second embedded position of the 3n+2th wire slot, the lower conductor of the first embedded position of the 1st wire slot to the lower conductor of the second embedded position of the n / 3th wire slot are connected one by one; The upper conductor of the first embedded position of the 4n-1th line slot to the upper conductor of the second embedded position of the 2nd line slot are connected one by one with the lower conductor of the first embedded position of the n+1th line slot to the lower conductor of the second embedded position of the 4n / 3th line slot; The upper conductor of the first embedded position of the n-1th slot to the upper conductor of the second embedded position of the 4n / 3-2th slot are connected one by one with the lower conductor of the first embedded position of the 2n+1th slot to the lower conductor of the second embedded position of the 7n / 3th slot; The upper conductor of the first embedded position of the 2n-1th line slot to the upper conductor of the second embedded position of the 2n+2th line slot are connected one-to-one with the lower conductor of the first embedded position of the 3n+1th line slot to the lower conductor of the second embedded position of the 10n / 3th line slot.

5. The generator rotor according to claim 1, characterized in that: At the lead end, the lower conductor of the first embedded position of the 4n / 3+1th wire slot and the lower conductor of the first embedded position of the 7n / 3+1th wire slot together serve as an external connection port of the B-phase winding; The upper conductor of the second embedded position of the 7n / 3+2th wire slot and the lead-out line of the upper conductor of the second embedded position of the 10n / 3+2th wire slot are short-circuited.

6. The generator rotor according to claim 5, characterized in that: At the lead end, from the lower conductor of the first embedded position of the n / 3+1th wire slot to the lower conductor of the second embedded position of the 2n / 3th wire slot, they are connected one by one with the upper conductor of the first embedded position of the 7n / 6+1th wire slot to the upper conductor of the second embedded position of the 9n / 6th wire slot; The lower conductor of the second embedded position of the 4n / 3+1th slot to the lower conductor of the second embedded position of the 5n / 3th slot are connected one by one with the upper conductor of the first embedded position of the 13n / 6+1th slot to the upper conductor of the first embedded position of the 15n / 6th slot; The lower conductor of the second embedded position of the 7n / 3+1th slot to the lower conductor of the second embedded position of the 8n / 3th slot are connected one by one with the upper conductor of the first embedded position of the 19n / 6+1th slot to the upper conductor of the first embedded position of the 21n / 6th slot; The lower conductor at the first embedded position of the 10n / 3+1th line slot to the lower conductor at the second embedded position of the 11n / 3th line slot are connected one-to-one with the upper conductor at the first embedded position of the n / 3-1th line slot to the upper conductor at the second embedded position of the n / 3+2th line slot.

7. The generator rotor according to claim 5, characterized in that: At the non-lead end, the upper conductor of the first embedded position of the 10n / 3-1th slot to the upper conductor of the second embedded position of the 10n / 3+2th slot are connected one by one with the lower conductor of the first embedded position of the n / 3+1th slot to the lower conductor of the second embedded position of the 2n / 3th slot; The upper conductor of the first embedded position of the n / 3-1th slot to the upper conductor of the second embedded position of the n / 3+2th slot are connected one by one with the lower conductor of the first embedded position of the 4n / 3+1th slot to the lower conductor of the second embedded position of the 5n / 3th slot; The upper conductor of the first embedded position of the 4n / 3-1th slot to the upper conductor of the second embedded position of the 4n / 3+2th slot are connected one by one with the lower conductor of the first embedded position of the 7n / 3+1th slot to the lower conductor of the second embedded position of the 8n / 3th slot; The upper conductor of the first embedded position of the 7n / 3-1th line slot to the upper conductor of the second embedded position of the 7n / 3+2th line slot are connected one by one with the lower conductor of the first embedded position of the 10n / 3+1th line slot to the lower conductor of the second embedded position of the 11n / 3th line slot.

8. The generator rotor according to claim 1, characterized in that: At the lead end, the lower conductor of the first embedded position of the 8n / 3+1th wire slot and the lower conductor of the first embedded position of the 11n / 3+1th wire slot together serve as an external wiring port of the C-phase winding; The upper conductor of the second embedded position of the 2n / 3+2th wire slot and the lead-out line of the upper conductor of the second embedded position of the 11n / 3+2th wire slot are short-circuited.

9. The generator rotor according to claim 8, characterized in that: At the lead end, the lower conductor of the second embedded position of the 8n / 3+1th wire slot to the lower conductor of the second embedded position of the 3nth wire slot are connected one by one with the upper conductor of the first embedded position of the 21n / 6+1th wire slot to the upper conductor of the first embedded position of the 23n / 6th wire slot; The lower conductor of the second embedded position of the 23n / 6-1 line slot to the lower conductor of the second embedded position of the 4n line slot are connected one by one with the upper conductor of the first embedded position of the 2n / 3-1 line slot to the upper conductor of the first embedded position of the 5n / 6 line slot; The lower conductor of the first embedded position of the 2n / 3+1th slot to the lower conductor of the second embedded position of the nth slot are connected one by one with the upper conductor of the first embedded position of the 9n / 6+1th slot to the upper conductor of the second embedded position of the 11n / 6th slot; The lower conductor at the first embedded position of the 5n / 3+1th line slot to the lower conductor at the second embedded position of the 2nth line slot are connected one-to-one with the upper conductor at the first embedded position of the 15n / 6+1th line slot to the upper conductor at the second embedded position of the 17n / 6th line slot.

10. The generator rotor according to claim 8, characterized in that: At the non-lead end, the upper conductor of the first embedded position of the 11n / 3-1th slot to the upper conductor of the second embedded position of the 4n-2th slot are connected one by one with the lower conductor of the first embedded position of the 2n / 3+1th slot to the lower conductor of the second embedded position of the nth slot; Connect the upper conductor of the first embedded position of the 2n / 3-1th slot to the upper conductor of the second embedded position of the 2n / 3+2th slot in a one-to-one correspondence with the lower conductor of the first embedded position of the 5n / 3+1th slot to the lower conductor of the second embedded position of the 2nth slot; The upper conductor of the first embedded position of the 5n / 3-1th slot to the upper conductor of the second embedded position of the 5n / 3+2th slot are connected one by one with the lower conductor of the first embedded position of the 8n / 3+1th slot to the lower conductor of the second embedded position of the 3nth slot; The upper conductor of the first embedded position of the 8n / 3-1th line slot to the upper conductor of the second embedded position of the 8n / 3+2th line slot are connected one-to-one with the lower conductor of the first embedded position of the 11n / 3+1th line slot to the lower conductor of the second embedded position of the 4nth line slot.

11. The generator rotor according to any one of claims 1 to 10, characterized in that: The notch includes a convex portion corresponding to the first embedding position and a concave portion corresponding to the second embedding position, and the protruding direction of the convex portion is the same as the concave direction of the concave portion, so that the width dimension of the notch is smaller than the width dimension of the slot body.

12. The generator rotor according to claim 11, characterized in that: An inter-row insulating member is arranged between the conductor of the first embedded position and the conductor of the second embedded position, and an inter-layer insulating member is arranged between the upper and lower layers of conductors of the first embedded position and the second embedded position.

13. A method for connecting a generator rotor winding, characterized in that: The following steps are involved: Wire embedding step: two layers of conductors are embedded in the first embedding position and the second embedding position of each wire slot, and all the conductors together form a conductor group; Winding connection steps: the lead end end span range of the conductor group is connected by wave winding 5n / 6 short distance mode, and the non-lead end end span range of the conductor group is connected by wave winding n+2 mode; Wherein, n is the pitch of the generator rotor.

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