阅读说明：本技术 一种无相带电机 (Phase-belt-free motor ) 是由 白贺冰 段洣恒 邢进川 刘献刚 白蕙境 于 2021-01-06 设计创作，主要内容包括：本发明公开了一种无相带电机,包括外转子、定子,定子包括铁心和绕组,铁心外表面上绕其轴线呈放射状均布若干个轴向通槽,通槽内设置有绕组,绕组包括A相、B相、C相,A相从第1槽开始绕制,跨越至第n槽、在第n槽绕制第一次,跨越至第2n槽、在第2n槽绕制第二次,依次方式绕制至尾槽时,再跨越至第3槽,以此形成A相第一层绕组；在第3槽绕制第一次,跨越至第(3+n)槽、在第(3+n)槽绕制第二次,跨越至第(3+2n)槽、在第(3+2n)槽绕制第三次,依次方式绕制至尾部时,再跨越至第2槽,以此形成A相第二层绕组；在第2槽开始绕制,跨越至第(2+n/2)槽绕制第一次,跨越至第(2+n)槽绕制第二次,依次方式绕制至尾部,以此形成A相第三层绕组。(The invention discloses a phase-free motor, which comprises an outer rotor and a stator, wherein the stator comprises an iron core and a winding, a plurality of axial through grooves are radially and uniformly distributed on the outer surface of the iron core around the axis of the iron core, the winding is arranged in the through grooves and comprises an A phase, a B phase and a C phase, the A phase is wound from a 1 st groove, spans to an nth groove, is wound for the first time in the nth groove, spans to a 2 nth groove and is wound for the second time in the 2 nth groove, and spans to a 3 rd groove when being wound to a tail groove in a sequential mode, so that an A-phase first-layer winding is formed; winding the first time in the 3 rd slot, spanning to the (3+ n) th slot, winding the second time in the (3+ n) th slot, spanning to the (3+2n) th slot, winding the third time in the (3+2n) th slot, and spanning to the 2 nd slot when winding the tail part in a sequential manner so as to form an A-phase second-layer winding; and starting winding in the 2 nd slot, spanning to the (2+ n/2) th slot for the first time, spanning to the (2+ n) th slot for the second time, and winding to the tail part in a sequential manner to form the A-phase third-layer winding.)

1. A phase-free motor is characterized by comprising an outer rotor and a stator, wherein the stator comprises an iron core and a winding, a plurality of axial through grooves are radially and uniformly distributed on the outer surface of the iron core around the axis of the iron core, the winding is arranged in the through grooves and comprises an A phase, a B phase and a C phase,

the phase A is wound from the 1 st slot, spans to the nth slot, is wound for the first time in the nth slot, spans to the 2 nth slot, is wound for the second time in the 2 nth slot, and spans to the 3 rd slot when being wound to the tail slot in a sequential mode, so as to form a phase A first layer winding;

winding the first time in the 3 rd slot, spanning to the (3+ n) th slot, winding the second time in the (3+ n) th slot, spanning to the (3+2n) th slot, winding the third time in the (3+2n) th slot, and spanning to the 2 nd slot when winding the tail part in a sequential manner so as to form an A-phase second-layer winding;

starting winding in the 2 nd slot, spanning to the (2+ n/2) th slot for the first time, spanning to the (2+ n) th slot for the second time, spanning to the (2+3n/2) th slot for the third time, spanning to the (2+2n) th slot for the fourth time, spanning to the (2+5n/2) th slot for the fifth time, and sequentially winding to the tail part to form an A-phase third-layer winding;

winding the phase B from the 2 nd slot, wherein the winding modes of the phase B and the phase A are the same;

winding the phase C from the 3 rd groove, wherein the winding modes of the phase C and the phase A are the same;

in phase A, the 1 st groove is taken as a head part, and the other end is taken as a tail part; in phase B, the No. 2 groove is taken as a tail part, and the other end is taken as a head part; in phase C, the beginning of the 3 rd slot is the head, and the other end is the tail.

2. A phase-less motor according to claim 1, wherein said through slots are provided on the circumferential surface of said core at an angle of 0.5 ° to 2.5 ° in the width direction of the circumferential surface.

3. A phase-less motor as claimed in claim 1, wherein said windings are arranged in layers in a single layer of wire in said through slots in the radial direction of said core, 3 layers being provided in each of said a, B and C phases, and 9 layers being provided in said windings.

4. A phase-less motor as claimed in claim 1, wherein said through slots have a rectangular cross-sectional shape with radially outer ends open, and an insulating layer is provided between both side walls of the through slots and the winding leads therein.

5. The phase-less motor as claimed in claim 1, wherein the core is divided into a plurality of segments by a circumferential angle thereof, and relatively independent windings are wound on the respective segments.

6. The phase-less motor as claimed in claim 1, wherein a plurality of windings are provided on the core in a circumferential angle segment-by-segment manner, and then a single winding is individually inputted or is inputted in series or in parallel as required.

7. A phase-less motor as set forth in claim 1, wherein the number of said through slots is twice the number of the magnetic poles, the width of the through slots is not greater than the circumferential width of the core sandwiched between two adjacent through slots, and the gap between two adjacent magnetic poles is not greater than the circumferential width of the core teeth sandwiched between two adjacent through slots.

8. The phase-less motor of claim 1, wherein the phases a, B, and C are wound with a plurality of wires.

Technical Field

The invention relates to the field of motors, in particular to a non-phase belt motor.

Background

Both the electric aircraft and the electric automobile use a power supply as power and are driven by a motor to operate. The prospect of electric drive is widely appreciated, but the current technology is not mature. Because the capacity of batteries loaded on aircrafts and automobiles is limited, the efficacy and energy consumption of the motor are directly related to the endurance mileage of the aircrafts and the automobiles, the conventional aircrafts and automobiles generally adopt three-phase direct current motors, and have the defects of large energy consumption, small torque, low efficiency, short endurance time and the like, so that the working time is greatly limited, and the application range is limited.

Harmonics in the machine are an important source of additional losses, causing noise, vibration, and in which the phase band magnetic potential harmonics generated by the windings account for a certain amount. How to not generate phase belt magnetic potential harmonic wave when the motor runs, thereby reducing the additional loss, vibration and noise of the motor and improving the efficiency of the motor, and is an important research direction.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a phase-belt-free motor so as to reduce additional loss, vibration and noise of the motor and improve the efficiency of the motor.

In order to achieve the purpose, the invention discloses a non-phase belt motor, which comprises an outer rotor and a stator, wherein the stator comprises an iron core and a winding, a plurality of axial through grooves are radially and uniformly distributed on the outer surface of the iron core around the axis of the iron core, the winding is arranged in the through grooves and comprises an A phase, a B phase and a C phase,

the phase A is wound from the 1 st slot, spans to the nth slot, is wound for the first time in the nth slot, spans to the 2 nth slot, is wound for the second time in the 2 nth slot, and spans to the 3 rd slot when being wound to the tail slot in a sequential mode, so as to form a phase A first layer winding;

winding the first time in the 3 rd slot, spanning to the (3+ n) th slot, winding the second time in the (3+ n) th slot, spanning to the (3+2n) th slot, winding the third time in the (3+2n) th slot, and spanning to the 2 nd slot when winding the tail part in a sequential manner so as to form an A-phase second-layer winding;

starting winding in the 2 nd slot, spanning to the (2+ n/2) th slot for the first time, spanning to the (2+ n) th slot for the second time, spanning to the (2+3n/2) th slot for the third time, spanning to the (2+2n) th slot for the fourth time, spanning to the (2+5n/2) th slot for the fifth time, and sequentially winding to the tail part to form an A-phase third-layer winding;

winding the phase B from the 2 nd slot, wherein the winding modes of the phase B and the phase A are the same;

winding the phase C from the 3 rd groove, wherein the winding modes of the phase C and the phase A are the same;

in phase A, the 1 st groove is taken as a head part, and the other end is taken as a tail part; in phase B, the No. 2 groove is taken as a tail part, and the other end is taken as a head part; in phase C, the beginning of the 3 rd slot is the head, and the other end is the tail.

Further, the through groove is arranged on the circumferential surface of the iron core and is obliquely arranged along the width direction of the circumferential surface, and the inclination angle of the through groove is 0.5-2.5 degrees.

Furthermore, the windings are arranged in the through groove in a single-layer lead layer-by-layer mode along the radial direction of the iron core, 3 layers are arranged in the A phase, the B phase and the C phase, and 9 layers are arranged in the windings.

Furthermore, the section of the through groove is in a rectangular shape with an opening at the outer end in the radial direction, and an insulating layer is arranged between the two side walls of the through groove and the inner winding wire of the through groove.

Furthermore, the iron core is divided into a plurality of sections according to the peripheral angle, and relatively independent windings are wound on each section.

Furthermore, after the plurality of windings are arranged on the iron core in a segmented mode according to the circumferential angle, the single winding is independently input according to the requirement, or the single winding is input after being connected in series or in parallel.

Furthermore, the number of the through grooves is twice of the number of the magnetic poles, the width of each through groove is not more than the circumferential width of the iron core clamped between the two adjacent through grooves, and the gap between the two adjacent magnetic poles is not more than the circumferential width of the iron core clamped between the two adjacent through grooves.

Furthermore, the phase A, the phase B and the phase C can also be wound by a plurality of conducting wires.

The invention relates to a non-phase-belt motor, which is characterized in that specific A-phase, B-phase and C-phase windings are arranged to form the non-phase-belt winding, so that phase belt magnetic potential harmonic waves generated by the windings are eliminated, the additional loss, vibration and noise of the motor are reduced, and the efficiency of the motor is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of a single-phase generator according to the present invention;

FIG. 2 is a schematic view of a core according to the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

FIG. 4 is a sectional view taken along line B-B of FIG. 2;

FIG. 5 is a schematic view of a magnetic ring with slots;

FIG. 6 is a cross-sectional view taken along line C-C of FIG. 5;

FIG. 7 is a schematic structural view of a connecting shaft;

FIG. 8 is a sectional view taken along line D-D of FIG. 7;

FIG. 9 is a schematic view of a single through slot on a circumferential surface of a core;

FIG. 10 is a partially enlarged schematic view of a cross-sectional structure of a single wire winding;

fig. 11 is a schematic development of the a-phase winding;

FIG. 12 is a schematic diagram of the unwinding of the B-phase winding;

fig. 13 is a C-phase winding deployment diagram.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

As shown in fig. 1 to 13, a phase-less motor of the present invention includes a current feedback unit, a voltage feedback unit, a speed feedback unit, a position detection unit, a current regulator, a speed regulator, and a plurality of sensors distributed on a stator of a motor.

The current of the motor driving circuit is fed back through the current feedback unit to realize the control of the current. The speed of the motor is fed back through the speed feedback unit to realize the speed control. According to the characteristics of the permanent magnet motor, the position of a motor winding needs to be accurately positioned, and then the polarity of the output voltage is judged in real time according to the position of a rotor. And the detection information of the position detection unit is transmitted to the PWM module, which changes the amplitude of the voltage transmitted to the motor by adjusting the pulse width of the driving voltage, thereby changing the rotational speed of the motor.

The sensor is a Hall element or an absolute value encoder, the Hall element or the absolute value encoder is independently installed on the stator of the motor, or the Hall element and the absolute value encoder are simultaneously installed on the stator of the motor, and by installing the sensors in two forms, when one sensor fails in detection, the other sensor can be immediately started to detect, so that the normal operation of the motor is ensured.

In the invention, the position of the motor winding is detected by a plurality of sensors, and each sensor controls a set current value and a set voltage value correspondingly so as to control different running states of the motor; when the motor works, the current, the voltage and the motor running speed are respectively fed back to the processor through the current feedback unit, the voltage feedback unit and the speed feedback unit, and the safety of the motor and a power supply system is ensured through the triple control of the current, the voltage and the speed.

The single-phase motor control system adopts a PID control mode for the motor rotating speed, takes the data sent by the control center through CAN communication as the given speed, and tracks the motor rotating speed in real time. Protection of the driver: the method comprises overcurrent, quick disconnection, drive faults, communication faults and the like, and corresponding protection is carried out when the equipment detects the faults so as to ensure the safety of a motor and a power supply system.

In an embodiment of the invention for use in an aircraft, the operating parameters of the single-phase motor control system may be:

rated input voltage: 225V-315V;

output current: 0-133.33A;

rated power: 30 KW;

rated point efficiency: 99 percent;

the working mode is as follows: manual/software control;

the instruction mode is as follows: a CAN protocol;

interface form: an aviation plug-in;

the driver operating temperature; -70 ℃ to +80 ℃;

a driver protection level; IP 65;

the driver works at atmospheric pressure: 101359.3-5476.4 Pa;

driver cooling and installation; and (5) naturally cooling by air.

As shown in fig. 1 to 13, the phase-free motor of the present invention includes an outer rotor 1, a stator 2, a magnetic pole 3, a winding 4, a magnetic ring with a slot 6, and a connecting shaft 7.

Wherein, a plurality of inside grooves are uniformly distributed on the magnetic ring with grooves 6 along the inner circumference, a plurality of magnetic poles 3 are uniformly distributed and fixed in the inside groove 61 along the circumference, the polarity of the magnetic poles 3 is arranged along the radial direction of the iron core, and the polarities of the adjacent magnetic poles are opposite. Through independently setting up trough of belt magnetic ring 6, convenient and external rotor 1's fixed connection, magnetic pole 3 snap-on is in inside groove 61 simultaneously, and the installation is fixed simply, is difficult for droing or shifting in the use, has guaranteed the security that the motor used.

The stator 2 comprises an iron core and a winding, a plurality of axial through grooves 21 are radially and uniformly distributed on the outer surface of the iron core around the axis of the iron core, and the winding 4 is arranged in each through groove 21. The through slots 21 are obliquely arranged on the circumferential surface of the core along the width direction B of the circumferential surface, the oblique angle is 0.5 to 2.5 degrees, as shown in fig. 9, the single through slot is schematically illustrated on the circumferential surface of the core, the core sandwiched between two adjacent through slots 21 is an iron tooth 22, the iron tooth 22 is arranged in a trapezoid shape compared with the circumferential surface in the width direction B, and the tooth width 25 of the iron tooth 22 on the front surface 23 of the core is smaller than the tooth width 26 of the iron tooth 22 on the back surface 24 of the core, for example, the tooth width 25 can be set to 3mm, and the tooth width 26 can be set to 3.5 mm.

As shown in fig. 11 to 13, the winding 4 includes a phase a, a phase B, and a phase C. Fig. 11 is a development schematic diagram of a phase a winding, wherein the phase a starts from the 1 st slot and is a head, and the other end is a tail. The phase A is wound from the 1 st slot, spans to the nth slot, is wound for the first time in the nth slot, spans to the 2 nth slot, is wound for the second time in the 2 nth slot, and spans to the 3 rd slot when being wound to the tail slot in a sequential mode, so that the phase A first layer winding 8 is formed.

And winding the first time in the 3 rd slot, spanning to the (3+ n) th slot, winding the second time in the (3+ n) th slot, spanning to the (3+2n) th slot, winding the third time in the (3+2n) th slot, and spanning to the 2 nd slot when winding the tail part in a sequential manner so as to form an A-phase second-layer winding 9.

Winding is started in the 2 nd slot, the winding is performed for the first time from the crossing to the (2+ n/2) th slot, the winding is performed for the second time from the crossing to the (2+ n) th slot, the winding is performed for the third time from the crossing to the (2+3n/2) th slot, the winding is performed for the fourth time from the crossing to the (2+2n) th slot, the winding is performed for the fifth time from the crossing to the (2+5n/2) th slot, and the winding is performed to the tail part in a sequential manner, so that the A-phase third-layer winding 10. In fig. 11, point a is a start end, point a 'is a tail end, 1-1' is marked as a first layer of winding wire, 2-2 'is marked as a second layer of winding wire, and 3-3' is marked as a third layer of winding wire.

Fig. 12 is an expanded schematic diagram of a phase B winding, the winding modes of the phase B and the phase a are the same, the 2 nd slot in the phase B is a tail, and the other end is a head. Starting from the tail part, for example, winding from the (3+5n/2) th slot, winding for the first time from crossing to the (3+2n) th slot, winding for the second time from crossing to the (3+3n/2) th slot, winding for the third time from crossing to the (3+ n) th slot, winding for the fourth time from crossing to the (3+ n/2) th slot, and winding for the 3 rd slot in a sequential manner, thereby forming the B-phase fourth-layer winding 11.

And the phase B fifth layer winding 12 is formed by spanning from the 3 rd slot to the (2+5n/2) th slot, winding for the first time in the (1+5n/2) th slot, spanning to the (2+3n/2) th slot, winding for the second time in the (1+3n/2) th slot, spanning to the (2+ n/2) th slot, winding for the third time in the (1+ n/2) th slot, and winding for the 4 th slot in a sequential manner.

And winding the winding from the 4 th slot to the (4+5n/2) th slot for the first time, from the (2+2n) th slot, from the (1+2n) th slot for the second time, from the (2+ n) th slot, from the (1+ n) th slot for the third time, and from the winding to the 2 nd slot in a sequential manner, so as to form a B-phase sixth-layer winding 13. In fig. 12, point B is a start end, point B 'is a tail end, 1-1' is denoted as a fourth layer of winding wire, 2-2 'is denoted as a fifth layer of winding wire, and 3-3' is denoted as a sixth layer of winding wire.

Fig. 13 is a development schematic diagram of the C-phase winding, wherein the phase a starts from the 1 st slot and is the head, and the other end is the tail. The C phase starts to wind from the 3 rd slot, crosses to the (2+ n) th slot, winds for the first time in the (3+ n) th slot, crosses to the (2+2n) th slot, winds for the second time in the (3+2n) th slot, and then crosses to the 5 th slot when winding to the tail slot in a sequential manner, so as to form a C phase seventh layer winding 14.

Starting from the 5 th slot, winding the first time in the 6 th slot, spanning to the (2+3n/2) th slot, winding the second time in the (3+3n/2) th slot, spanning to the (2+5n/2) th slot, winding the third time in the (3+3n/2) th slot, and spanning to the 4 th slot when winding the tail part in a sequential manner, thereby forming the C-phase eighth-layer winding 15.

And starting winding in the 4 th slot, spanning to the (1+ n) th slot for the first time, spanning to the (1+3n/2) th slot for the second time, spanning to the (1+2n) th slot for the third time, spanning to the (1+5n/2) th slot for the fourth time, and sequentially winding to the tail part to form the C-phase ninth-layer winding 16. In fig. 13, point C is a start end, point C 'is a tail end, 1-1' is marked as a seventh layer of winding wire, 2-2 'is marked as an eighth layer of winding wire, and 3-3' is marked as a ninth layer of winding wire.

In this embodiment, n is 6. In the invention, phase B is wound from the 2 nd groove, and the winding modes of phase B and phase A are the same; winding the phase C from the 3 rd groove, wherein the winding modes of the phase C and the phase A are the same; in phase A, the 1 st groove is taken as a head part, and the other end is taken as a tail part; in phase B, the No. 2 groove is taken as a tail part, and the other end is taken as a head part; in phase C, the beginning of the 3 rd slot is the head, and the other end is the tail.

The number of the through grooves 21 is twice of the number of the magnetic poles 3, the width of the through grooves 21 is not more than the circumferential width of the iron core (iron teeth 22) clamped between two adjacent through grooves 21, and the gap between two adjacent magnetic poles 3 is not more than the circumferential width of the iron teeth 22 clamped between two adjacent through grooves; meanwhile, the circumferential width of the magnetic pole 3 is the sum width of the circumferential widths of the 2 through grooves 21 and the circumferential width of the +1 iron teeth 22.

The winding 4 is arranged in the through groove 21 in a layered mode by a single layer of conducting wire along the radial direction of the iron core, the winding 4 can be wound by a single conducting wire or a plurality of conducting wires, when the plurality of conducting wires are adopted for winding, the conducting wires are sequentially arranged in parallel, and each layer of winding is arranged on the same radial circumferential surface when being wound, so that each layer of winding is a single layer of conducting wire;

the cross section of the through groove 21 is in a rectangular shape with an opening at the radial outer end, an insulating layer 5 is arranged between two side walls of the through groove 21 and a winding wire in the through groove, and the wound winding 4 is fixed in the through groove 21 through resin (not shown in the figure).

After the section of the through groove 21 is set to be a rectangle with an opening, the layered winding of the single-layer wire of the winding wire in the through groove 21 can be effectively ensured; the single-layer conducting wire is wound in a layered mode, so that the space utilization rate can be improved, the size of the whole motor is reduced, the number of jumper wires in the winding can be effectively reduced, the length of the jumper wires is effectively reduced, and the structure of the winding is simplified; in addition, the circumferential width of the iron core clamped between the two through grooves 21 is not smaller than the gap between the two adjacent magnetic poles 3, so that the cutting of the coil in the winding on the magnetic force line of the magnetic field can be effectively ensured, and the power of the motor is ensured.

The winding 4 can be wound by a single wire, the winding mode is only simple superposition of the illustrated structure, in this case, two starting ends of the wire are directly led out, and each layer of winding is formed by sequentially winding the free end of the single wire along the radial direction of the iron core.

When two or two groups of conducting wires are adopted to wind the whole winding, two starting ends of the two conducting wires or the two groups of conducting wires can also participate in the winding, and the specific winding mode is as follows: after the first layer of winding is finished, the starting ends of two or two groups of wires wind the second layer of winding on the surface of the first layer along the same direction of the tail end winding iron core, then the tail ends of the two or two groups of wires start to wind the third layer of winding on the surface of the second layer, only the coil in the winding wound by the starting ends of the wires needs to be radially overlapped with the coil in the winding wound by the tail end of the wires and has opposite opening directions, after the third layer of winding is finished, the starting ends of the wires wind the fourth layer of winding, then the tail end winds the fifth layer, and the starting ends wind the sixth layer, and the steps are carried out in sequence until the steps are finished.

When the starting end of the wire participates in winding of the winding, and the opening direction of the coil in the winding wound by the wire is opposite to the opening direction of the coil wound by the tail end of the wire, the coil jumpers positioned on the axial outer side in each layer of winding can be arranged in a staggered mode, so that the winding of the winding is facilitated, the space utilization rate can be improved, and the heat dissipation of the winding is facilitated after the arrangement density of the wire is reduced. In addition, after the winding is wound in a staggered manner at the starting end and the tail end of the lead, no jumper wire is needed, the winding structure is simplified, and unnecessary occupation of space is reduced.

The winding method of each section of winding is the same as that shown in figures 11, 12 and 13, and when the winding is segmented and each section of winding is wound by two or two groups of wires, the tail end of the wire can not naturally return to the starting end of the wire after rotating the iron core for one circle, so the tail end of the wire and the starting end of the wire need to be treated in the same way as the above, and when the tail end of the wire is wound back, the coil in the winding needs to be radially overlapped with the coil in the first layer of winding and the opening direction.

After a plurality of windings are arranged on the iron core in a segmented mode according to circumferential angles, each winding can be independently input according to needs, or the windings are properly connected in series or in parallel and then input.

In the invention, the method comprises the following steps: 1) the through grooves 21 are arranged on the circumferential surface of the iron core in an inclined manner along the width direction B of the circumferential surface; 2) a simple, efficient wire winding form; 3) the installation form and the width ratio of the magnetic poles 3 are set; 4) the arrangement form of the sensor; 5) specific A-phase, B-phase and C-phase windings are arranged to form a non-phase belt winding; the invention eliminates the phase zone magnetic potential harmonic wave generated by the winding, reduces the additional loss, vibration and noise of the motor and improves the efficiency of the motor.