CN116404790A - Motor with winding end adopting busbar structure - Google Patents

Abstract

The invention discloses a motor with a busbar structure at the end part of a winding, belongs to the field of motor stator windings, and aims to solve the problem that the assembly is difficult due to a complex connection mode of the existing motor winding. The invention comprises a motor shell, a stator iron core, an armature winding, a winding end molding copper terminal, a connecting copper bar, a busbar fixing frame and a motor outgoing line; the stator core is positioned in the motor shell, and the armature winding is embedded in a groove of the stator core by adopting a straight wire; a busbar fixing frame is respectively arranged on the end surfaces of two sides of the stator iron core and is fixed on the motor shell through a fixing hole, and a plurality of busbar are embedded in fixing clamping grooves of the busbar fixing frame; the two side end parts of the armature winding in each stator slot are fixed through the winding end part shaping copper terminals, then the armature windings are led to the corresponding bus bars by utilizing connecting copper bars with different lengths, and the bus bars of one end face of the stator core are provided with motor outgoing lines for being connected with an external power supply.

Description

Motor with winding end adopting busbar structure

Technical Field

The invention relates to a connection combination technology of motor stator windings, and belongs to the field of motor stator windings.

Background

The motor used as driving equipment cannot be separated from various links of industrial production and transportation at present, for example, an integer slot distributed winding motor with 8 poles 48 slots or 6 poles 36 slots which are most used in new energy automobiles, but the axial length and the volume of the motor are greatly increased by excessively long winding ends, and the overall rigidity of the motor is also adversely affected. The motor windings are generally connected through wave winding or lap winding, winding coil-down must be completed all the time according to a specified sequence, expensive and complex equipment is not needed, machining efficiency is low, fault tolerance is poor, and special assembly tools are required to be developed for motors matched with different pole grooves, so that process cost is high. In the early stage of motor design or in the field of special motors, the motor windings sometimes need to generate magnetic fields with different pole pairs or different frequency spectrum characteristics under the condition of not changing the motor structure, and the motor adopting the conventional windings can only be re-wound or the connection ends of the windings are fused and welded again, so that the performance and the reliability of the motor can be greatly influenced, and the windings can not be completely taken out from the grooves after the motor windings are immersed in paint and fixed. Meanwhile, high efficiency and high torque density are pursued for motor design all the time, and the oversized winding end increases winding resistance, motor loss and heating power, and the winding end connected by the winding teeth is unfavorable for heat dissipation, so that the efficiency and output torque of the motor are reduced. The existing winding structure, especially the winding connection structure, cannot solve the problems at the same time, and further improvement of motor performance is hindered.

Disclosure of Invention

Aiming at the problems that the existing motor winding is difficult to assemble and the line sequence cannot be flexibly adjusted due to the complex connection mode, and the end part occupies a large space, the invention provides a motor with a busbar structure at the end part of the winding. The winding end of the motor adopts a busbar structure, the conductor in the motor groove is connected into a whole through the winding end shaping copper terminal at the end according to the current flow direction and the phase sequence, and the connection copper bars are respectively connected to the C-shaped busbar or the O-shaped busbar according to the winding design of the motor, so that the whole conductor is prevented from being bent and wound on the tooth part, the deformation and the internal stress of the conductor are reduced, and the winding is prevented from being deformed to occupy more space. The end adopts busbar to connect and has avoided the complicated connecting wire of conventional winding end, reduces motor axial length and stator resistance, helps the motor heat dissipation and further promotes efficiency, and all busbar is fixed on the motor casing through busbar mount concentricity, avoids directly fixing on the stator to influence the heat dissipation, reduces the motor reliability.

The invention discloses a motor with a busbar structure at the end part of a winding, which comprises a motor shell 1, a stator iron core 2, an armature winding 3, a winding end part shaping copper terminal 4, a connecting copper bar 5, a busbar fixing frame 8 and a motor outgoing line 9, wherein the armature winding 3 is n phases;

the stator core 2 is positioned in the motor shell 1, and the armature winding 3 is embedded in a groove of the stator core 2 by adopting a straight wire;

a busbar fixing frame 8 is respectively arranged on the end surfaces of two sides of the stator core 2 and is fixed on the motor shell 1 through fixing holes, and a plurality of busbar are embedded in fixing clamping grooves of the busbar fixing frame 8; the two side ends of the armature winding 3 in each stator slot are firstly fixed through winding end shaping copper terminals 4, then the armature windings 3 are led to corresponding bus bars by connecting copper bars 5 with different lengths, and a motor outgoing line 9 for connecting with an external power supply is arranged on the bus bar of one end face of the stator core 2.

Preferably, the bus bar is one or both of the O-type bus bar 7 and the C-type bus bar 6.

Preferably, when the Y-type connection of the motor windings is realized, n bus bars are arranged on the side without the motor outgoing line 9, and are n C-type bus bars 6 or n O-type bus bars 7, each C-type bus bar 6 or O-type bus bar 7 is used for converging one phase winding, and one side inlet and outlet end of each phase winding is connected through the C-type bus bar 6 or the O-type bus bar 7 by utilizing the connecting copper bar 5; an O-shaped bus bar 7 and n C-shaped bus bars 6 are arranged on the side with motor outgoing lines 9, one end of each phase armature winding 3 is connected to the O-shaped bus bar 7 through a winding end shaping copper terminal 4 by a connecting copper bar 5 to form a neutral point, and the other end of each phase armature winding 3 is connected to the C-shaped bus bar 6 of the corresponding phase through a winding end shaping copper terminal 4 by a connecting copper bar 5 to collect the outgoing lines of each phase and is led out through the motor outgoing lines 9 fixed on the C-shaped bus bar 6.

Preferably, when the delta connection of the motor windings is realized, n bus bars are arranged on the side without the motor outgoing line 9, and are n C-type bus bars 6 or n O-type bus bars 7, each C-type bus bar 6 or O-type bus bar 7 is used for converging one phase winding, and one side inlet and outlet end of each phase winding is connected through the C-type bus bar 6 or the O-type bus bar 7 by using the connecting copper bar 5; 2*n C-shaped bus bars 6 are arranged on one side with motor outgoing lines 9, the C-shaped bus bars 6 are used for respectively connecting the inlet and outlet ends of each phase of the armature winding 3 together, then the C-shaped bus bars 6 are connected through connecting copper bars 5 according to the phase sequence, and finally the motor outgoing lines 9 are fixed on the C-shaped bus bars 6.

Preferably, when the open winding connection mode of the motor winding is realized, n bus bars are arranged on the side without the motor outgoing line 9, and are n C-type bus bars 6 or n O-type bus bars 7, each C-type bus bar 6 is used for converging one phase winding, and one side inlet and outlet end of each phase winding is connected through the C-type bus bar 6 or the O-type bus bar 7 by using a connecting copper bar 5; on the side with the motor outgoing line 9, first, the inlet and outlet terminals of each phase of the armature winding 3 are respectively connected together by 2*n C-shaped bus bars 6, and then the motor outgoing line 9 is respectively fixed on the C-shaped bus bars 6 corresponding to the inlet and outlet of each phase.

Preferably, when the current flow direction and the phase sequence of two layers of windings in each slot of the motor winding are the same, the two layers of windings can be jointly fixed by adopting a winding end shaping copper terminal 4 so as to reduce the space occupied by interlayer insulation; when the current flow direction and the phase sequence of two layers of windings in each slot of the motor winding are different, the two layers of windings are respectively fixed by adopting an independent winding end shaping copper terminal 4.

Preferably, the busbar is fixed by embedding into the clamping groove.

Preferably, fixing holes for fixing are formed in the winding end molding copper terminal 4, the connecting copper bar 5, the busbar fixing frame 8 and the motor outgoing line 9;

when the wire sequence does not need to be adjusted, the winding end shaping copper terminal 4, the connecting copper bar 5, the busbar fixing frame 8 and the motor outgoing wire 9 are fixed in a welding mode;

when the wire sequence needs to be flexibly adjusted, the winding end shaping copper terminal 4, the connecting copper bar 5, the busbar fixing frame 8 and the motor outgoing line 9 are fixed in a detachable mode such as bolts, rivets and the like.

Preferably, the busbar holder 8 is made of an insulating material such as epoxy resin.

Preferably, the outer surfaces of the winding end shaping copper terminals 4 and the connecting copper bars 5 are sprayed with an insulating varnish layer.

The invention has the beneficial effects that: the motor with the busbar structure at the winding end replaces the end of all conventional motor windings including the end of the conductor with the same turn around the tooth by the specially designed copper terminal, the connecting copper bar and the busbar, so that the space occupied by the winding end is greatly reduced, and the weight of motor structures such as a machine shell and the like is reduced; meanwhile, the conductors in the grooves are integrally connected at the end parts through the winding end part shaping copper terminals, the wire winding teeth are not required to be bent to realize end part connection of the conductors with the same turn, and the stress and deformation of the conductors caused by the bending are avoided, so that the rigidity and the structural reliability of the winding are improved, and the space occupied by the deformation of the winding in the winding assembly process is reduced. Copper terminals led out of the windings are connected on the busbar by adopting connection copper bars, the length and the resistance of the end parts of the windings are greatly reduced, copper loss and heat generated by the end windings are reduced, and the efficiency of the motor is improved; and each layer of conductor in the groove is connected with the busbar through the winding end shaping copper terminal and the connecting copper bar, so that the assembly is flexible and efficient, complex tooling equipment and the winding connection mode can be flexibly changed even after the encapsulation or the motor processing is finished, and various winding combinations with the same groove number and different line sequences are realized. The busbar adopts a C-shaped or O-shaped structure and single-end or double-end arrangement according to winding distribution, so that the occupied space of the winding end is further reduced. The end busbar is arranged on the stator core through the busbar fixing frame, so that the difficulty in heat dissipation caused by tight connection between two end faces of the motor stator core and the winding when the conductor winds around the tooth is avoided; the conductive structures are connected by adopting surface contact, so that the conductive structure has good wear resistance, high load current, small contact resistance and poor reliability under the load of welding modes and the like.

Drawings

Fig. 1 is a schematic structural view of a motor of embodiment 1 in which a winding end portion adopts a busbar structure, having a lead end face;

fig. 2 is a schematic structural view of a motor of embodiment 1 in which a busbar structure is used for the winding end portion, and no lead end face is provided;

fig. 3 is a schematic diagram of a motor winding arrangement and connection using a conventional winding, which is the same as the slot fit, winding distribution of example 1, wherein fig. 3 (a) is a schematic diagram of a-phase winding arrangement and connection; fig. 3 (B) is a schematic diagram of B-phase winding arrangement and connection; FIG. 3 (C) is a schematic diagram of C-phase winding arrangement and connection;

FIG. 4 is a schematic exploded view of a motor with a busbar configuration for the winding heads according to the present invention;

FIG. 5 is a schematic view of a bus bar;

FIG. 6 is a schematic diagram of the arrangement and connection of the windings of the motors of examples 2-4;

fig. 7 is a schematic view of the structure of two end faces of the motor of embodiment 2, wherein fig. 7 (a) is a structure with a lead end face and fig. 7 (b) is a structure without a lead end face;

fig. 8 is a schematic view of the structure of both end faces of the motor of embodiment 3, wherein fig. 8 (a) is a structure having a lead end face and fig. 8 (b) is a structure not having a lead end face;

fig. 9 is a schematic view of the structure of both end faces of the motor of example 4, wherein fig. 9 (a) is a terminal face with a lead wire, and fig. 9 (b) is a terminal face without a lead wire.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.

The first embodiment is as follows: the motor with the busbar structure at the winding end part in the embodiment is described below with reference to fig. 1 to 5, and includes a motor housing 1, a stator core 2, an armature winding 3, a winding end part molding copper terminal 4, a connection copper bar 5, a busbar fixing frame 8 and a motor outgoing line 9, wherein the armature winding 3 is n phases;

the stator core 2 is positioned in the motor shell 1, and the armature winding 3 is embedded in a groove of the stator core 2 by adopting a straight wire;

a busbar fixing frame 8 is respectively arranged on the end surfaces of two sides of the stator core 2 and is fixed on the motor shell 1 through fixing holes, and a plurality of busbar are embedded in fixing clamping grooves of the busbar fixing frame 8; the two side ends of the armature winding 3 in each stator slot are firstly fixed through winding end shaping copper terminals 4, then the armature windings 3 are led to corresponding bus bars by connecting copper bars 5 with different lengths, and a motor outgoing line 9 for connecting with an external power supply is arranged on the bus bar of one end face of the stator core 2.

Referring to fig. 1 to 5, in the description of embodiment 1, embodiment 1 is an integer slot motor with 36 slots of three-phase 6 poles using Y-type connection windings, the wiring schematic diagrams at two ends thereof are shown in fig. 1 and 2, the disassembly schematic diagrams thereof are shown in fig. 4 and 5, two busbar holders 8 arranged at two ends of a stator core 2 are fixed on a motor housing 1 through fixing holes, the busbar holders 8 are made of insulating materials such as epoxy resin, and the busbar comprises four O-type busbar 7 and three C-type busbar 6,O-type busbar 7, and the C-type busbar 6 is arranged in a fixing slot of the busbar holders 8; the two side ends of the armature winding 3 in each stator slot are fixed through the winding end shaping copper terminals 4, and as the current flow direction and the phase sequence of the two layers of windings in each slot of the embodiment are the same, the space occupied by interlayer insulation can be reduced by adopting a mode of jointly fixing the two layers, and on the side without a motor outgoing line 9, the windings of each phase are respectively connected through the O-shaped bus bar 7 by using connection copper bars 5 with different lengths, and are fixed by using fixing holes of the connection copper bars 5; on the side with the motor outgoing line 9, since the windings of the embodiment adopt Y-shaped connection, each phase of windings is firstly connected through the O-shaped bus bar 7 to form a neutral point, each phase of outgoing line is respectively collected through the C-shaped bus bar 6, and finally is led out through the motor outgoing line 9 fixed on the C-shaped bus bar 6, each phase of motor outgoing line 9 is fixed on each corresponding C-shaped bus bar 6 through a fixing hole, and insulating paint layers are sprayed on the outer surfaces of the winding end molding copper terminal 4 and the connecting copper bar 5.

The stator winding end of the motor with the winding end adopting the busbar structure is connected with each phase of winding respectively through the busbar and the terminal at the non-winding leading-out side, and the wire winding teeth are not required to be bent to realize the end connection of the same-turn conductor, so that the stress and deformation of the conductor caused by the bending are avoided, the rigidity and the reliability of the winding are improved, and the space occupied by the deformation in the winding assembly process is reduced; FIG. 3 is a single-ended schematic diagram of the motor winding arrangement and connection using conventional windings corresponding to the motor of this embodiment, where the winding end connection lines are circles or arcs with similar radii, and a circle perimeter is used as a unit length, where the conventional winding single-sided end connection lines in FIG. 3 have 6 unit lengths, and the neutral point connection of the Y-connection needs 1 extra unit length of end connection line, and the 3-phase 6-pole 36-slot conventional winding needs 13 unit length of end connection lines; as can be seen from fig. 1 and 2, the stator winding of the motor adopting the busbar structure at the winding end requires 3 busbars with unit length at the non-motor outgoing line side, 2/3 busbars with unit length are required for each outgoing line at the motor outgoing line side, and 1 extra end connecting line with unit length is required for the neutral point connection, 6 end connecting lines with unit length are required, and the line length is shortened by 53.8%; the length and the resistance of the winding end are greatly reduced, copper loss and heat generated by the end winding are reduced, and the motor efficiency is improved; the connecting device adopting the terminal and the bus bar does not occupy excessive end space, so that the weight of motor structures such as a machine shell and the like is reduced; as can be seen from fig. 1 and 2, the connection sequence and the fixation of the winding end designed by the invention do not affect the winding off-line, and different wiring modes under the same slot number can be flexibly realized.

The bus bar adopts one or two of the O-shaped bus bar 7 and the C-shaped bus bar 6, the specific number is determined according to the actual phase number, wherein the O-shaped bus bar 7 is adopted when the number of winding inlet and outlet terminals to be connected is large and the occupied circumferential range is large, otherwise, the C-shaped bus bar 6 is adopted to save the occupied area and the materials.

The second embodiment is as follows: the present embodiment will be described with reference to fig. 6 and 7, in which a first embodiment will be further described,

when Y-shaped connection of motor windings is realized, n bus bars are arranged on the side without motor outgoing lines 9, the bus bars are n C-shaped bus bars 6 or n O-shaped bus bars 7, each C-shaped bus bar 6 or O-shaped bus bar 7 is used for converging one phase winding, and one side inlet and outlet end of each phase winding is connected through the C-shaped bus bars 6 or the O-shaped bus bars 7 by utilizing a connecting copper bar 5; an O-shaped bus bar 7 and n C-shaped bus bars 6 are arranged on the side with motor outgoing lines 9, one end of each phase armature winding 3 is connected to the O-shaped bus bar 7 through a winding end shaping copper terminal 4 by a connecting copper bar 5 to form a neutral point, and the other end of each phase armature winding 3 is connected to the C-shaped bus bar 6 of the corresponding phase through a winding end shaping copper terminal 4 by a connecting copper bar 5 to collect the outgoing lines of each phase and is led out through the motor outgoing lines 9 fixed on the C-shaped bus bar 6.

In example 2, as shown in fig. 7, the three-phase 8-pole 9-slot fractional-slot motor Y-type connection winding is wired in a structure substantially identical to that of an integer-slot motor. The main difference from the specific embodiment 1 is that the fractional slot motor winding using three-phase 8-pole 9 slots has two layers of in-phase and out-of-phase with the in-slot winding, and sometimes one winding slot needs to use two winding end shaping copper terminals 4; on the side without the motor outgoing line 9, the number of the C-shaped bus bars 6 is three, and the windings of each phase are respectively connected through the C-shaped bus bars 6 by utilizing the connecting copper bars 5 with different lengths; on the side with the motor outgoing line 9, since the windings are connected in a Y-type manner in the embodiment, each phase winding is firstly connected through one O-type bus bar 7 to form a neutral point, each phase outgoing line is respectively collected through three C-type bus bars 6, and finally, each phase outgoing line is led out through the motor outgoing line 9 fixed on the C-type bus bars 6.

And a third specific embodiment: the present embodiment will be described with reference to fig. 6 and 8, in which a first embodiment will be further described,

when the delta connection of the motor windings is realized, n bus bars are arranged on the side without the motor outgoing line 9, the n bus bars are n C-type bus bars 6 or n O-type bus bars 7, each C-type bus bar 6 or O-type bus bar 7 is used for converging one phase winding, and one side inlet and outlet end of each phase winding is connected through the C-type bus bar 6 or the O-type bus bar 7 by utilizing the connection copper bar 5; 2*n C-shaped bus bars 6 are arranged on one side with motor outgoing lines 9, the C-shaped bus bars 6 are used for respectively connecting the inlet and outlet ends of each phase of the armature winding 3 together, then the C-shaped bus bars 6 are connected through connecting copper bars 5 according to the phase sequence, and finally the motor outgoing lines 9 are fixed on the C-shaped bus bars 6.

Example 3 three-phase 8-pole 9-slot fractional-slot motor delta connection winding wiring is shown in fig. 8, and the adopted structure is substantially identical to that of an integer-slot motor. The two ends of the motor winding are fixed together or respectively by using a winding end molding copper terminal 4 according to whether the windings in each groove are in phase, the number of the C-shaped bus bars 6 is three on the side without the motor outgoing line 9, and the windings in each phase are respectively connected through the C-shaped bus bars 6 by using connecting copper bars 5 with different lengths; on the side with motor outgoing lines 9, because the windings of this embodiment adopt triangle connection, firstly, six C-shaped bus bars 6 are utilized to connect the incoming and outgoing lines of each phase respectively, then two C-shaped bus bars 6 are connected together according to a specific phase sequence through a connecting copper bar 5, the phase sequence of the three-phase triangle connection is 'A positive-C negative, B positive-A negative, C positive-B negative', the connecting copper bar 5 is fixed on the two C-shaped bus bars 6 connected together through a fixing hole, and finally three motor outgoing lines 9 are fixed on the C-shaped bus bars 6.

The specific embodiment IV is as follows: the present embodiment will be described with reference to fig. 6 and 9, in which a first embodiment will be further described,

when the motor winding opening winding connection mode is realized, n bus bars are arranged on the side without the motor outgoing line 9, the bus bars are n C-type bus bars 6 or n O-type bus bars 7, each C-type bus bar 6 is used for converging one phase winding, and one side inlet and outlet end of each phase winding is connected through the C-type bus bars 6 or the O-type bus bars 7 by utilizing the connecting copper bars 5; on the side with the motor outgoing line 9, first, the inlet and outlet terminals of each phase of the armature winding 3 are respectively connected together by 2*n C-shaped bus bars 6, and then the motor outgoing line 9 is respectively fixed on the C-shaped bus bars 6 corresponding to the inlet and outlet of each phase.

Example 4 a three-phase 8-pole 9-slot fractional-slot motor with open-winding wiring as shown in fig. 9 employs a structure substantially identical to an integer-slot motor. The two ends of the motor winding are fixed together or respectively by using a winding end molding copper terminal 4 according to whether the windings in each groove are in phase, the number of the C-shaped bus bars 6 is three on the side without the motor outgoing line 9, and the windings in each phase are respectively connected through the C-shaped bus bars 6 by using connecting copper bars 5 with different lengths; on the side with the motor outgoing line 9, since the winding of the embodiment adopts an open winding form, and one lead wire is required to be led out from the inlet and outlet ends of each phase winding, the motor outgoing line 9 is twice the number of phases, firstly, the inlet and outlet ends of each phase are respectively connected by using six C-shaped bus bars 6, then, the motor outgoing line 9 is respectively fixed on the C-shaped bus bars 6 corresponding to the inlet and outlet ends of each phase, and the six motor outgoing lines 9 in the open winding form three-phase motor are respectively 'A positive, A negative, B positive, C positive and C negative'.

Fifth embodiment: in the first embodiment, when the current flow direction and the phase sequence of two layers of windings in each slot of the motor winding are the same, the two layers of windings can be fixed by adopting one winding end molding copper terminal 4 together so as to reduce the space occupied by interlayer insulation; when the current flow direction and the phase sequence of two layers of windings in each slot of the motor winding are different, the two layers of windings are respectively fixed by adopting an independent winding end shaping copper terminal 4.

Specific embodiment six: in the first embodiment, the following is a further description of the first embodiment, and the fixing manner of each component is:

the busbar is fixed by embedding the busbar into the clamping groove.

The winding end molding copper terminal 4, the connecting copper bar 5, the busbar fixing frame 8 and the motor outgoing line 9 are provided with fixing holes for fixing;

when the wire sequence does not need to be adjusted, the winding end shaping copper terminal 4, the connecting copper bar 5, the busbar fixing frame 8 and the motor outgoing wire 9 are fixed in a welding mode;

when the wire sequence needs to be flexibly adjusted, the winding end shaping copper terminal 4, the connecting copper bar 5, the busbar fixing frame 8 and the motor outgoing line 9 are fixed in a detachable mode such as bolts, rivets and the like.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in ways other than as described in the original claims. It is also to be understood that features described in connection with separate embodiments may be used in other described embodiments.

Claims (10)

1. The motor with the busbar structure at the winding end is characterized by comprising a motor shell (1), a stator iron core (2), an armature winding (3), a winding end shaping copper terminal (4), a connecting copper bar (5), a busbar fixing frame (8) and a motor outgoing line (9), wherein the armature winding (3) is in n phase;

the stator core (2) is positioned in the motor shell (1), and the armature winding (3) is embedded in a groove of the stator core (2) by adopting a straight wire;

a busbar fixing frame (8) is respectively arranged on the end surfaces of two sides of the stator core (2), and is fixed on the motor shell (1) through a fixing hole, and a plurality of busbar are embedded in a fixing clamping groove of the busbar fixing frame (8); the two side end parts of the armature winding (3) in each stator slot are fixed through winding end part shaping copper terminals (4), then the armature winding (3) is led to corresponding bus bars by utilizing connecting copper bars (5) with different lengths, and a motor outgoing line (9) used for being connected with an external power supply is arranged on the bus bar of one end surface of the stator core (2).

2. The electric machine with a busbar arrangement at the winding end according to claim 1, characterized in that the busbar is one or both of an O-busbar (7) and a C-busbar (6).

3. The motor with the busbar structure at the end of the winding according to claim 2, characterized in that when the Y-shaped connection of the motor winding is realized, n busbar bodies are arranged at the side without motor outgoing lines (9) and are n C-shaped busbar bodies (6) or n O-shaped busbar bodies (7), each C-shaped busbar body (6) or O-shaped busbar body (7) is used for busbar a phase winding, and one side inlet and outlet terminal of each phase winding is connected through the C-shaped busbar body (6) or the O-shaped busbar body (7) by utilizing a connecting copper bar (5); an O-shaped bus bar (7) and n C-shaped bus bars (6) are arranged on one side with motor outgoing lines (9), one end of each phase of armature winding (3) is connected to the O-shaped bus bar (7) through a winding end molding copper terminal (4) to form a neutral point, and the other end of each phase of armature winding (3) is connected to the C-shaped bus bar (6) of the corresponding phase through a winding end molding copper terminal (4) through a winding end molding copper terminal (5) to collect outgoing lines of each phase and is led out through the motor outgoing lines (9) fixed on the C-shaped bus bar (6).

4. The motor with the busbar structure at the end of the winding according to claim 1, characterized in that when the delta connection of the motor winding is realized, n busbar bodies are arranged at the side without motor outgoing lines (9) and are n C-type busbar bodies (6) or n O-type busbar bodies (7), each C-type busbar body (6) or O-type busbar body (7) is used for busbar of a phase winding, and one side inlet and outlet terminal of each phase winding is connected through the C-type busbar body (6) or the O-type busbar body (7) by utilizing a connecting copper bar (5); 2*n C-shaped bus bars (6) are arranged on one side with motor outgoing lines (9), all phases of inlet and outlet ends of an armature winding (3) are respectively connected together by the C-shaped bus bars (6), all the C-shaped bus bars (6) are connected by connecting copper bars (5) according to phase sequences, and finally all the motor outgoing lines (9) are fixed on the C-shaped bus bars (6).

5. The motor with the busbar structure at the end of the winding according to claim 1, wherein when the motor winding is in an open winding connection mode, n busbar bodies are arranged on the side without motor outgoing lines (9) and are n C-type busbar bodies (6) or n O-type busbar bodies (7), each C-type busbar body (6) is used for busbar a phase winding, and one side inlet and outlet end of each phase winding is connected through the C-type busbar body (6) or the O-type busbar body (7) by using a connecting copper bar (5); on the side with the motor outgoing line (9), the 2*n C-shaped bus bars (6) are utilized to respectively connect the inlet and outlet ends of each phase of the armature winding (3) together, and then the motor outgoing line (9) is respectively fixed on the C-shaped bus bars (6) corresponding to the inlet and outlet of each phase.

6. The motor of claim 3, 4 or 5, wherein when the current flow direction and the phase sequence of the two layers of windings in each slot of the motor winding are the same, the two layers of windings can be fixed together by adopting a winding end shaping copper terminal (4) so as to reduce the space occupied by interlayer insulation; when the current flow direction and the phase sequence of two layers of windings in each slot of the motor winding are different, the two layers of windings are fixed by adopting independent winding end shaping copper terminals (4).

7. The motor of claim 1, wherein the winding heads are configured as bus bars, and wherein the bus bars are secured by means of snap-fit slots.

8. The motor with the busbar structure at the winding end according to claim 3, 4 or 5, characterized in that the winding end molding copper terminal (4), the connecting copper bar (5), the busbar fixing frame (8) and the motor outgoing line (9) are provided with fixing holes for fixing;

when the wire sequence does not need to be adjusted, the winding end shaping copper terminal (4), the connecting copper bar (5), the busbar fixing frame (8) and the motor outgoing wire (9) are fixed in a welding mode;

when the wire sequence needs to be flexibly adjusted, the winding end shaping copper terminal (4), the connecting copper bar (5), the busbar fixing frame (8) and the motor outgoing line (9) are detachably fixed by bolts or rivets.

9. The electric machine with busbar construction at the winding end according to claim 1, characterized in that the busbar holder (8) is made of epoxy insulating material.

10. The electric machine with busbar construction at the winding end according to claim 1, characterized in that the outer surfaces of the winding end shaped copper terminals (4) and the connecting copper bars (5) are sprayed with an insulating varnish layer.

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