CN201947147U

CN201947147U - High-power brushless DC (direct current) motor with multiphase parallel-connection wave winding

Info

Publication number: CN201947147U
Application number: CN2011200985414U
Authority: CN
Inventors: 吴建华; 张敏; 钱进
Original assignee: ZHEJIANG FOUNDER MOTOR CO Ltd
Current assignee: ZHEJIANG FOUNDER MOTOR CO Ltd
Priority date: 2011-04-07
Filing date: 2011-04-07
Publication date: 2011-08-24
Anticipated expiration: 2021-04-07

Abstract

The utility model provides a high-power brushless DC (direct current) motor with a multiphase parallel-connection wave winding, which comprises a stator, wherein the inner wall of the stator is provided with a wire embedding slot; the winding is embedded in the wire embedding slot and is disassembled into two or more than two sub-phase windings which are embedded in the wire embedding slot; and the two or more than two sub-phase windings are connected in parallel in an end-to-end manner. Compared with a traditional directly-wound three-phase winding, when the wave winding is wound in parallel in a multi-phase manner, one strand of wiring harness originally formed by various enameled wires is disassembled into two or more than two strands of wiring harnesses which are respectively embedded and wound in the wire embedding slot of the stator, so the sectional area and the hardness of each strand of wiring harness are reduced, the wire embedding difficulty of the winding is obviously lowered, the three-phase symmetry of the winding is improved, the lengths of the end parts of the winding are reduced, and effective material consumption of the winding is reduced.

Description

Wave winding Multiphase Parallel high-power brushless direct current machine

Technical field

The utility model relates to a kind of high-power brushless direct current machine, and particularly a kind of stator adopts the high-power brushless direct current machine of three phase windings.

Background technology

Brshless DC motor is made up of motor body and driver, is a kind of typical electromechanical integrated product.The advantage of brushless electric machine: electronic commutation replaces traditional mechanical commutation, dependable performance, do not have wearing and tearing forever, failure rate is low, the life-span has been improved about 6 times than brush motor, the efficient height, volume is little, has represented the developing direction of electric motor car.Widely used three-phase brushless dc motor, stator adopts the three-phase alternating current distributed winding, and three phase windings directly turn to star Y or triangle △, and star winding schematic diagram is as shown in Figure 1.But to the high-power brushless direct current machine, as high-power brushless direct current machine such as electric automobile, oil field, because electric current is very big, usually adopt and reach tens of leads and be compiled into wire harness and carry out rule, because the wire harness sectional area is big, flexible poor, traditional three-phase winding construction tends to cause the rule difficulty, and winding overhang is long, three-phase winding parameter imbalance, effectively degradation problem under the stock utilization.

Summary of the invention

The utility model proposes that a kind of that three phase windings are resolved into a plurality of subitem windings is in parallel again and adopt the wave winding Multiphase Parallel high-power brushless direct current machine of wave winding rule mode, the winding configuration that is proposed has solved the problems referred to above of high-power brushless direct current machine tradition winding construction.

The utility model solves the problems of the technologies described above the concrete scheme of employing:

This wave winding Multiphase Parallel high-power brushless direct current machine comprises stator, and stator inner wall is provided with line embedding groove, be embedded with winding in the line embedding groove, winding resolves into two or more sub-phase windings, is embedded in line embedding groove, and two or more sub-phase windings are connected in parallel from beginning to end.Like this, originally every 1 strand bundle that winding is made up of many enamelled wires has just resolved into the wire harness more than two strands or two strands, and embedding is in the line embedding groove of stator respectively.Like this, just reduce the sectional area and the hardness of per share wire harness, obviously reduced winding rule difficulty, improved the three-phase symmetry of winding, reduced winding overhang length, reduced the effective material consumption of winding.The end refers to the stator core two ends not in inner winding part unshakable in one's determination (being invalid edges), stator winding form in the past is because the cross-sectional area of wire harness is bigger, flexible poor, relatively more difficult during rule, cause the invalid edges winding of end more, effectively stock utilization has just descended, and the utility model adopts the mode of Multiphase Parallel, make the wire harness cross-sectional area of stator winding diminish, better flexible, the invalid edges of end will correspondingly reduce simultaneously.

Each sub-phase winding short pitch, meropodium are embedded in line embedding groove apart from being arranged alternately.Like this, just do not have phase difference between each sub-phase winding, circulation can not occur.

Each sub-phase winding around stator circumference clockwise and the mode that replaces counterclockwise be provided with, be embedded in line embedding groove.Like this, just make winding overhang shorter more even.Stator circumference clockwise and the mode coiling that replaces counterclockwise make the position of circumferencial direction of each sub-phase winding not concentrate on the same groove, thereby make rule more succinct, it is shorter that the end can be done, and makes the utilance of effective material rise like this.To motor multipole, that the branch road sectional area of wire is bigger, for saving interpolar line copper, usually adopt wave winding, the characteristics of wave winding are that two single-turn circular coil wavinesses that are connected are advanced.The connection rule of wave winding is, all same polarity (as N ₁.N ₂) under belong to same phase coil be together in series successively by waveform, form one group, again all another polarity (S ₁.S ₂) under belong to same phase coil be together in series successively by waveform, form another group, at last this two big group coil is connected into series connection or in parallel as required, constitute a phase winding.

The utility model beneficial effect: compare with traditional direct coiling three phase windings, because the 1 strand bundle of during wave winding Multiphase Parallel coiling of the present utility model many enamelled wires of former cause being formed, resolve into wire harness more than two strands or two strands, embedding is in the line embedding groove of stator respectively, reduce the sectional area and the hardness of per share wire harness, obviously reduced winding rule difficulty, improved the three-phase symmetry of winding, reduce winding overhang length, reduced the effective material consumption of winding.

Description of drawings

Fig. 1 is the utility model three phase winding Y-connection schematic diagrams;

Fig. 2 is the rule schematic diagram of the utility model A item winding;

Fig. 3 is that each phase winding of the utility model is in parallel respectively, forms the structural representation of 3 phase windings;

Fig. 4 is 3 o'clock for the sub-phase winding number of turn of the utility model, adopts clockwise and the counterclockwise alternately winding schematic diagram of coiling;

The sub-phase winding number of turn of Fig. 5 the utility model is 3 o'clock, adopts clockwise and replace counterclockwise the perspective view of coiling.

Description of reference numerals: coil side 1, stator 2, line embedding groove 2-1, winding head 3, coil tail 4, the first circle coils 5, the second circle coils 6, the three circle coils 7, winding 8, sub-phase winding 8-1.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing:

With reference to accompanying drawing: present embodiment resolves into two subitem winding 8-1 with every winding 8, and each subitem winding 8-1 is an example around 3 circles.

This wave winding Multiphase Parallel high-power brushless direct current machine described in the utility model is that with the difference of traditional brshless DC motor the stator winding structure is different, comprise stator 2, stator 2 inwalls are provided with line embedding groove 2-1, be embedded with winding 8 in the line embedding groove 2-1, winding 8 resolves into two sub-phase winding 8-1, be embedded in line embedding groove 2-1, two sub-phase winding 8-1 are connected in parallel from beginning to end.Each sub-phase winding 8-1 short pitch, meropodium are embedded in line embedding groove 2-1 apart from being arranged alternately.Each sub-phase winding 8-1 around stator circumference clockwise and the mode that replaces counterclockwise be provided with, be embedded in line embedding groove 2-1.

Referring to Fig. 2, when coiling A phase winding, the coil side 1 of 2 sub-phase winding 8-1 rolls off the production line respectively, and short pitch and meropodium form two sub-phase windings of A1-X1, A2-X2 apart from hocketing, again line first A1, A2 are linked together, line tail X1, X2 link together, thus the A phase winding A-X that forms in parallel, and B, C phase winding are with the quadrat method winding, make the winding of original coiled 6 phases, parallel connection becomes 3 phase windings.3 phase windings that obtained can be Y-connections, as Fig. 3, also can be that triangle connects.When the winding rule, must adopt short pitch, meropodium apart from embedding alternately around, and can not wait the pitch embedding around, otherwise can cause that phase difference is arranged between the sub-phase winding, circulation appears.When rule, can also be according to every coil turn requirement, adopt around stator circumference clockwise around a week, around the mode in week etc., make winding overhang shorter more even, counterclockwise as Fig. 4, shown in Figure 5.Among Fig. 4, mark 3 is the winding head (being first A1, A2 of previously described line) of two sub-phase windings, and mark 4 is the coil tail (being previously described line tail X1, X2) of two sub-phase windings, and mark 5 is the first circle coil, mark 6 second circle coils, mark 7 are the 3rd circle coil.

Description in conjunction with the above-mentioned exemplary type that the utility model is carried out; but the utility model specific implementation is not limited by aforesaid way; adopt method design of the present utility model and the various improvement of technical scheme; or directly apply to other occasions without improvement, all within protection range of the present utility model.

Claims

1. wave winding Multiphase Parallel high-power brushless direct current machine, comprise stator (2), stator (2) inwall is provided with line embedding groove (2-1), be embedded with winding (8) in the line embedding groove (2-1), it is characterized in that: described winding (8) resolves into two or more sub-phase windings (8-1), be embedded in line embedding groove (2-1), two or more sub-phase windings (8-1) head and the tail are connected in parallel.

2. wave winding Multiphase Parallel high-power brushless direct current machine according to claim 1 is characterized in that: each sub-phase winding (8-1) short pitch, meropodium are embedded in line embedding groove (2-1) apart from being arranged alternately.

3. wave winding Multiphase Parallel high-power brushless direct current machine according to claim 1 and 2 is characterized in that: each sub-phase winding (8-1) around stator circumference clockwise and the mode that replaces counterclockwise be provided with, be embedded in line embedding groove (2-1).