Flat wire motor short pitch winding

Abstract

The present invention relates to the field of motor winding parts, and in particular to a short-pitch winding for a flat wire motor. A short-pitch winding for a flat wire motor comprises a stator core (1), the stator core (1) is a cylindrical ring, and is characterized in that: a conductor slot (11) is provided on the inner side wall of the stator core (1), the number of the conductor slots (11) is an integer multiple of 12, the conductor slots (11) are parallel to each other and have equal spacing, and each conductor slot (11) is provided with an even number of layers of conductors (12) in sequence from the slot opening to the slot bottom, and an insulating layer is provided between adjacent conductors (12). The present invention reduces harmonics and has a simple process.

Description

Technical Field

[0001] The invention relates to the field of motor winding components, in particular to a short-distance winding of a flat wire motor. Background Art

[0002] The existing flat wire motor stator winding is relatively complicated to manufacture. Due to process limitations, the implementation method is basically full-pitch winding. Figure 1 to Figure 4 As shown: the stator core 1 is a cylindrical ring, and a conductor slot 11 is arranged on the inner side wall of the stator core 1. The number of the conductor slots 11 is an integer multiple of 12. The conductor slots 11 are parallel to each other and have equal spacing. Conductors 12 are arranged in sequence from the slot opening to the slot bottom in each conductor slot 11. An insulating layer is arranged between adjacent conductors 12. The motor phases corresponding to the conductors 12 in each conductor slot 11 are the same, as shown in FIG. Figure 2 As shown in the figure: if the motor phase corresponding to the conductor 12 in a conductor slot 11 is +A, then the motor phases corresponding to the conductors 12 in the remaining conductor slots 11 are +A, -B, -B, +C, +C, -A, -A, +B, +B, -C, -C, and the order is repeated. The torsion angle of the top of each conductor 12 for welding is Figure 4 The θ in are all equal, Figure 4 In the middle, θ=22.5°. This structure leads to a high harmonic content of the motor, which brings problems such as vibration and noise. Summary of the invention

[0003] In order to overcome the defects of the prior art and provide a winding with reduced harmonics and simple process, the present invention discloses a short-pitch winding of a flat wire motor.

[0004] The present invention achieves the purpose of the invention through the following technical solutions:

[0005] A short-pitch winding of a flat wire motor includes a stator core, which is a cylindrical ring and is characterized by:

[0006] Conductor slots are provided on the inner side wall of the stator core, and the number of the conductor slots is an integer multiple of 12. The conductor slots are parallel to each other and have equal spacing. A certain conductor slot is taken as a busbar to unfold the cylindrical ring of the stator core, and the conductor slot is taken as the 1# conductor slot. The remaining conductor slots are numbered as 2# conductor slot, 3# conductor slot, ..., i# conductor slot in order from near to far from the 1# conductor slot, where i is a positive integer divisible by 12.

[0007] Each conductor slot has an even number of conductors from the slot opening to the slot bottom. An insulating layer is placed between adjacent conductors. The conductors in the i# conductor slot are numbered as (i,1)#conductor, (i,2)#conductor, ..., (i,j)#conductor from the slot opening to the slot bottom, where j is a positive even number.

[0008] The motor phase corresponding to the (p,1)#~(p,j / 2)# conductor is determined as follows, where p∈[1,i] and p is a positive integer: Let x be the remainder of p divided by 12. If x is 0, then t is 12, otherwise t=x.

[0009] When t=1 or 2, the motor phase is +A phase,

[0010] When t=3 or 4, the motor phase is -B phase,

[0011] When t=5 or 6, the motor phase is +C phase,

[0012] When t=7 or 8, the motor phase is -A phase,

[0013] When t=9 or 10, the motor phase is +B phase,

[0014] When t=11 or 12, the motor phase is -C phase,

[0015] Among them, + represents the current outflow end, - represents the current inflow end;

[0016] The motor phases corresponding to the (q,(j / 2)+1)#~(q,j)# conductors are determined as follows, where q∈[1,i] and q is a positive integer:

[0017] Let y be the remainder of q divided by 12. If y is 0, then t is 1, otherwise t=y+1.

[0018] When t=1 or 2, the motor phase is +A phase,

[0019] When t=3 or 4, the motor phase is -B phase,

[0020] When t=5 or 6, the motor phase is +C phase,

[0021] When t=7 or 8, the motor phase is -A phase,

[0022] When t=9 or 10, the motor phase is +B phase,

[0023] When t=11 or 12, the motor phase is -C phase,

[0024] Among them, + represents the current outflow end, - represents the current inflow end;

[0025] The conductors are formed, twisted and welded to form windings, and one end of the conductors on the same side and in the same motor phase is a welding end and is connected to each other by welding;

[0026] The cross section of the conductor is rectangular.

[0027] The flat wire motor short-pitch winding is characterized in that the twist angles of the welding ends of the first layer conductor and the second layer conductor are both 22.5°; the twist angles of the welding ends of the third layer conductor are both 15°, and the twist angles of the welding ends of the fourth layer conductor are both 30°.

[0028] The short-pitch winding of the flat wire motor is characterized in that the length of the rectangular conductor cross section is 1.2 to 5 times the width.

[0029] The present invention adopts a structure in which conductors of different phases are arranged in the same conductor slot, and conductors of different layers can be connected by changing the twist angle of the conductor welding end to form a complete winding.

[0030] The present invention has the following beneficial effects: by changing the flat wire twist angle, the current situation of difficulty in realizing short-pitch winding of flat wire motor is improved, the short-pitch distribution of flat wire is realized, and harmonics are reduced. Combined with a special flat wire twist angle combination, short pitch is realized more conveniently, the motor harmonic amount is reduced, the motor quality is improved, and the process is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the prior art;

[0032] Figure 2 It is an expanded diagram of the internal phase distribution of the conductor slot of the stator core in the prior art;

[0033] Figure 3 It is a partial schematic diagram of the prior art;

[0034] Figure 4 is a schematic diagram of the skew angle of the prior art;

[0035] Figure 5 It is a phase distribution expansion diagram in the conductor slot of the stator core of the present invention;

[0036] Figure 6 It is a schematic diagram of the correspondence between the conductor and the number of layers in the present invention;

[0037] Figure 7 It is a partial schematic diagram of the present invention;

[0038] Figure 8 Schematic diagram of the skew angle of the present invention. DETAILED DESCRIPTION

[0039] The present invention is further described below by means of specific examples.

[0040] Example 1

[0041] A short-pitch winding of a flat wire motor includes a stator core 1, which is a cylindrical ring. Figures 5 to 8 As shown, the specific structure is:

[0042] Conductor slots 11 are provided on the inner side wall of the stator core 1. The number of the conductor slots 11 is an integer multiple of 12. The conductor slots 11 are parallel to each other and have equal spacing. A certain conductor slot 11 is taken as a busbar to unfold the cylindrical ring of the stator core 1. The conductor slot 11 is 1# conductor slot 11, and the remaining conductor slots 11 are numbered as 2# conductor slot 11, 3# conductor slot 11, ..., i# conductor slot 11 in order of distance from the 1# conductor slot 11 from near to far, where i is a positive integer divisible by 12.

[0043] Each conductor slot 11 is provided with an even number of conductors 12 from the slot opening to the slot bottom, and an insulating layer is provided between adjacent conductors 12. The conductors 12 in the i# conductor slot 11 are numbered as (i,1)#conductor 12, (i,2)#conductor 12, ..., (i,j)#conductor 12 from the slot opening to the slot bottom, where j is a positive even number.

[0044] (p,1)#~(p,j / 2)#The motor phase corresponding to conductor 12 is determined as follows, where p∈[1,i] and p is a positive integer: Let x be the remainder of p divided by 12. If x is 0, then t is 12, otherwise t=x.

[0045] When t=1 or 2, the motor phase is +A phase,

[0046] When t=3 or 4, the motor phase is -B phase,

[0047] When t=5 or 6, the motor phase is +C phase,

[0048] When t=7 or 8, the motor phase is -A phase,

[0049] When t=9 or 10, the motor phase is +B phase,

[0050] When t=11 or 12, the motor phase is -C phase,

[0051] Among them, + represents the current outflow end, - represents the current inflow end;

[0052] The motor phase corresponding to the conductor 12 (q,(j / 2)+1)#~(q,j)# is determined as follows, where q∈[1,i] and q is a positive integer:

[0053] Let y be the remainder of q divided by 12. If y is 0, then t is 1, otherwise t=y+1.

[0054] When t=1 or 2, the motor phase is +A phase,

[0055] When t=3 or 4, the motor phase is -B phase,

[0056] When t=5 or 6, the motor phase is +C phase,

[0057] When t=7 or 8, the motor phase is -A phase,

[0058] When t=9 or 10, the motor phase is +B phase,

[0059] When t=11 or 12, the motor phase is -C phase,

[0060] Among them, + represents the current outflow end, and - represents the current inflow end.

[0061] This embodiment adopts 48 slots and 8 poles, that is, 48 ​​conductor slots 11 are provided on the inner wall of the stator core 1, and each conductor slot 11 is provided with 4 layers of conductors 12 in sequence from the slot opening to the slot bottom.

[0062] The motor phases of the conductors 12 of the first and second layers along the 1# conductor slot 11 are divided into 4 units, each unit includes 12 conductor slots, and the motor phases of the conductors 12 of the same layer in each unit are +A, +A, -B, -B, +C, +C, -A, -A, +B, +B, -C and -C in sequence;

[0063] Take (5,1)# conductor 12 as an example, i=48, j=4, p=5, then:

[0064] x is p divided by 12, the remainder is 5, x≠0, so we take t=x=5,

[0065] t=5, the motor phase is +C phase,

[0066] The motor phases of the remaining conductors 12 in the first and second layers are similarly described.

[0067] The motor phases of the conductors 12 of the third and fourth layers along the 1# conductor slot 11 are divided into 4 units, each unit includes 12 conductor slots, and the motor phases of the conductors 12 of the same layer in each unit are + A, -B, -B, +C, +C, -A, -A, +B, +B, -C, -C and +A in sequence;

[0068] Take (24,3)# conductor 12 as an example, i=48, j=4, q=24, then:

[0069] y is the remainder of q divided by 12 is 0, and x is 0, so t is 1.

[0070] t=1, the motor phase is +A phase,

[0071] The motor phases of the remaining conductors 12 in the third and fourth layers are similarly described.

[0072] The conductor 12 is formed into a winding after being formed, twisted and welded. One end of the conductor 12 on the same side and in the same motor phase is a welding end and is connected to each other by welding.

[0073] In this embodiment, the twist angles of the welding ends of the first layer conductor 12 and the second layer conductor 12 are both 22.5°; the twist angle of the welding end of the third layer conductor 12 is Figure 8 The α in the figure is 15°, and the twist angle of the soldered end of the fourth layer conductor 12 is Figure 8 The β in is always 30°.

[0074] In this embodiment, the cross section of the conductor 12 is a rectangle, and the length of the rectangle of the cross section of the conductor 12 is 1.2 to 5 times the width.

[0075] Figure 6 This is a new type of 48-slot 8-pole motor winding schematic diagram, which has four layers of flat wire winding, that is, each stator slot has 4 conductors, conductor 1 corresponds to the first layer set, and so on. The phase distribution expansion diagram in the winding slot is shown in Figure 5 As shown, the conductors of the 3rd and 4th layers are offset by one stator slot relative to the conductors of the 1st and 2nd layers, forming a short distance;

[0076] Figure 7 and Figure 8 Schematic diagram of conductor skew of the 3rd and 4th layers, which is asymmetric skew, where the conductor skew angle of the 3rd layer is 15°, and the conductor skew angle of the 4th layer is 30°;

[0077] Conductor 1 and conductor 4 are connected to the external conductor, and conductor 2 and conductor 3 are connected by welding, thus forming a complete short-pitch winding of the flat wire motor.

Claims

1. A short-pitch winding of a flat wire motor, comprising a stator core (1), wherein the stator core (1) is a cylindrical ring, and wherein: Conductor slots (11) are provided on the inner side wall of the stator core (1), the number of the conductor slots (11) is an integer multiple of 12, the conductor slots (11) are parallel to each other and have equal spacing, a certain conductor slot (11) is taken as a busbar to unfold the cylindrical ring of the stator core (1), the conductor slot (11) is 1# conductor slot (11), and the remaining conductor slots (11) are numbered in sequence from near to far from the 1# conductor slot (11) as 2# conductor slot (11), 3# conductor slot (11), ..., i# conductor slot (11), wherein i is a positive integer divisible by 12, An even number of conductors (12) are arranged in sequence from the slot opening to the slot bottom in each conductor slot (11), and an insulating layer is provided between adjacent conductors (12). The conductors (12) in the i# conductor slot (11) are numbered in sequence from the slot opening to the slot bottom as (i, 1)# conductor (12), (i, 2)# conductor (12), ..., (i, j)# conductor (12), wherein j is a positive even number. The motor phase corresponding to the (p,1)#~(p,j / 2)# conductor (12) is determined as follows, where p∈[1,i] and p is a positive integer: Let x be the remainder of p divided by 12. If x is 0, then t is 12, otherwise t=x. When t=1 or 2, the motor phase is +A phase, When t=3 or 4, the motor phase is -B phase, When t=5 or 6, the motor phase is +C phase, When t=7 or 8, the motor phase is -A phase, When t=9 or 10, the motor phase is +B phase, When t=11 or 12, the motor phase is -C phase, Among them, + represents the current outflow end, - represents the current inflow end; The motor phase corresponding to the (q,(j / 2)+1)#~(q,j)# conductor (12) is determined as follows, where q∈[1,i] and q is a positive integer: Let y be the remainder of q divided by 12. If y is 0, then t is 1, otherwise t=y+1. When t=1 or 2, the motor phase is +A phase, When t=3 or 4, the motor phase is -B phase, When t=5 or 6, the motor phase is +C phase, When t=7 or 8, the motor phase is -A phase, When t=9 or 10, the motor phase is +B phase, When t=11 or 12, the motor phase is -C phase, Among them, + represents the current outflow end, - represents the current inflow end; The conductor (12) is formed into a winding after being shaped, twisted and welded, and one end of the conductor (12) on the same side and with the same motor phase is a welding end and is connected to each other through welding; The cross section of the conductor (12) is rectangular; The twist angles of the welding ends of the first layer conductor (12) and the second layer conductor (12) are both 22.5 degrees; the twist angles of the welding ends of the third layer conductor (12) are both 15 degrees; and the twist angles of the welding ends of the fourth layer conductor (12) are both 30 degrees.

2. The short-pitch winding of the flat wire motor according to claim 1, characterized in that: The length of the rectangular cross section of the conductor (12) is 1.2 to 5 times the width.

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