阅读说明：本技术 风扇 (Fan with cooling device ) 是由 吴迪 武谷雨 陈金涛 龚黎明 诸自强 于 2018-07-03 设计创作，主要内容包括：本发明提供了一种风扇,包括：风罩、头部、双轴双动力电机、第一转轴、第二转轴、第一扇片、第二扇片,安装于头部内部的双轴双动力电机包括呈环形的定子、磁阻转子和永磁转子,定子、磁阻转子以及永磁转子依次由内向外或由外向内嵌套且相互可旋转,定子包括定子铁芯、绕制在定子铁芯上的定子绕组,其中磁阻转子和永磁转子分别用于驱动安装有第一扇片的第一转轴和安装有第二扇片的第二转轴相对旋转,从而扇片在只有现有电风扇的一半扇片转速情况下,能达到两倍的出风效果。本发明提供的风扇,采用无机械差速、无离合的方式实现了双动力旋转和送风效果,系统集成度高、功率密度大、能耗低、可靠性高、噪音小。(The present invention provides a fan, including: the fan housing, the head, the double-shaft double-power motor, first pivot, the second pivot, first fan blade, the second fan blade, install in the inside double-shaft double-power motor of head including being annular stator, reluctance rotor and permanent magnet rotor, the stator, reluctance rotor and permanent magnet rotor are in proper order from inside to outside or outside-in nestification and rotatable each other, the stator includes stator core, the stator winding of coiling on stator core, wherein reluctance rotor and permanent magnet rotor are used for the drive respectively to install the first pivot of first fan blade and install the second pivot relative rotation of second fan blade, thereby the fan blade is under the half fan blade rotational speed condition of only current electric fan, can reach the air-out effect of twice. The fan provided by the invention realizes double-power rotation and air supply effects by adopting a mode without mechanical differential and clutch, and has the advantages of high system integration level, high power density, low energy consumption, high reliability and low noise.)

1. A fan, comprising:

the double-shaft double-power motor is arranged in the head and is connected with a first rotating shaft and a second rotating shaft which rotate coaxially; and

the fan cover is arranged at the head, the first rotating shaft and the second rotating shaft both extend into the inner cavity of the fan cover, the second rotating shaft penetrates through the hollow part in the middle of the first rotating shaft and extends out, the first rotating shaft is provided with first fan blades, and the second rotating shaft is provided with second fan blades;

wherein, biax dual-power motor is including being annular stator, reluctance rotor and permanent magnet rotor, the stator reluctance rotor and permanent magnet rotor is in proper order from inside to outside or outside-in nestification and can rotate each other, just the stator reluctance rotor with every adjacent two all with the air gap interval in the permanent magnet rotor, reluctance rotor and permanent magnet rotor are rotatory independently each other, the stator includes: stator core, stator winding, the stator winding coiling is in on the stator core, reluctance rotor with in the permanent magnet rotor one with first pivot relatively fixed connection is used for the drive first pivot is rotatory, just reluctance rotor with in the permanent magnet rotor another with second pivot relatively fixed connection is used for the drive the second pivot is rotatory.

2. The fan as claimed in claim 1,

the stator comprises one set of stator winding or two sets of stator windings.

3. The fan as claimed in claim 1,

the stator core comprises a stator shell, and the stator shell is sleeved on the outer side of the stator core.

4. The fan according to any one of claims 1 to 3,

the reluctance rotor comprises a magnetic reluctance iron core and non-magnetic spacer blocks, wherein the magnetic reluctance iron core and the spacer blocks are alternately arranged to form a ring shape.

5. The fan according to any one of claims 1 to 3,

the permanent magnet rotor comprises a permanent magnet core and magnetic steel, wherein the magnetic steel comprises a plurality of permanent magnet cores arranged at intervals in the circumferential direction, and the magnetic steel is opposite in polarity.

6. The fan according to claim 2 or 3,

the stator comprises a set of stator winding, the reluctance rotor comprises reluctance cores with magnetic conductivity and spacing blocks with non-magnetic conductivity, the reluctance cores and the spacing blocks are alternately arranged to form an annular shape, and the number of the reluctance cores is p_rThe winding span of the stator winding is y_1sAnd form a number of pole pairs of p_sA rotating magnetic field, the permanent magnet rotor forms a pole pair number p_fThe permanent magnetic field of (a), wherein:

p_r＝|p_s±p_f|；p_f≠p_s。

7. the fan as claimed in claim 6,

the current injection frequency of the stator winding satisfies: omega_s＝p_rΩ_r-p_fΩ_fWherein ω is_sFor the control frequency, omega, of the stator winding_rAnd Ω_fThe mechanical rotation speeds of the reluctance rotor and the permanent magnet rotor respectively;

the current injection phase angle of the stator winding satisfies: theta_s＝-p_rθ_r+p_fθ_fWherein theta_sBeing the phase angle, theta, of the axis of the injected current of the stator winding_fAnd theta_rThe mechanical angle difference of the alignment positions of the permanent magnet rotor and the reluctance rotor with the d axis is respectively.

8. The fan according to claim 2 or 3,

the stator comprises two sets of stator windings, the reluctance rotor comprises reluctance cores with magnetic conductivity and spacing blocks with non-magnetic conductivity, the reluctance cores and the spacing blocks are alternately arranged to form an annular shape, and the number of the reluctance cores is equal to that of the spacing blocksIs p_rThe winding span of the two sets of stator windings is y_1sAnd y_1adAnd respectively form a number of pole pairs of p_sAnd p_adThe permanent magnet rotor forms a pole pair number p_fThe permanent magnetic field of (a), wherein:

p_r＝|p_s±p_f|；p_ad＝p_f≠p_s；y_1s≠y_1ad。

9. the fan as claimed in claim 8,

the current injection frequencies of the two sets of stator windings respectively meet the following conditions: omega_s＝p_rΩ_r-p_fΩ_f；ω_ad＝p_fΩ_fWherein ω is_sAnd ω_adControl frequency, omega, of two sets of windings respectively_rAnd Ω_fThe mechanical rotation speeds of the reluctance rotor and the permanent magnet rotor respectively;

the current injection phase angles of the two sets of stator windings respectively meet the following conditions: theta_s＝-p_rθ_r+p_fθ_f；θ_ad＝-p_fθ_fWherein theta_sAnd theta_adThe phase angle, theta, of the axis of the injected current for each of the two sets of windings_fAnd theta_rThe mechanical angle difference of the alignment positions of the permanent magnet rotor and the reluctance rotor with the d axis is respectively.

10. The fan according to any one of claims 1 to 3,

the first fan blade and the second fan blade both comprise at least one fan blade.

Technical Field

The invention relates to the technical field of household appliances, in particular to a fan.

Background

Disclosure of Invention

The present invention is directed to solving at least one of the above problems.

Accordingly, an object of the present invention is to provide a fan.

In order to achieve the above object, a technical solution of the present invention provides a fan, including: the double-shaft double-power motor is arranged in the head and is connected with a first rotating shaft and a second rotating shaft which rotate coaxially; the first rotating shaft and the second rotating shaft extend into the inner cavity of the fan housing, the second rotating shaft penetrates through the hollow part in the middle of the first rotating shaft and extends out, the first rotating shaft is provided with first fan blades, and the second rotating shaft is provided with second fan blades; wherein, biax dual-power motor is including being annular stator, reluctance rotor and permanent magnet rotor, the stator reluctance rotor and permanent magnet rotor is in proper order from inside to outside or outside-in nestification and can rotate each other, just the stator reluctance rotor with every adjacent two all with the air gap interval in the permanent magnet rotor, reluctance rotor and permanent magnet rotor are rotatory independently each other, the stator includes: stator core, stator winding, the stator winding coiling is in on the stator core, reluctance rotor with in the permanent magnet rotor one with first pivot relatively fixed connection is used for the drive first pivot is rotatory, just reluctance rotor with in the permanent magnet rotor another with second pivot relatively fixed connection is used for the drive the second pivot is rotatory.

According to the fan provided by the technical scheme, a double-rotating-shaft double-power rotating structure is adopted, the reluctance rotor and the permanent magnet rotor respectively drive the first rotating shaft provided with the first fan blade and the second rotating shaft provided with the second fan blade to rotate relatively, so that the air supply quantity and the air supply effect are effectively improved; meanwhile, compared with the existing fan with a single fan blade, the double-speed air outlet effect can be achieved under the condition that the fan blade only has half the rotating speed of the existing electric fan, so that the performance requirement of the motor is reduced, and meanwhile, the motor runs at a relatively low speed, so that the double-speed air outlet fan is beneficial to the service life and the stable structure of the motor; meanwhile, compared with the existing scheme that two motors are axially connected in series to output double rotating speeds, the length, the weight and the cost of the head are reduced; secondly, the double-power rotation and air supply effects are realized by adopting a mode without mechanical differential and clutch, the system integration level is high, the power density is high, the energy consumption is low, the reliability is high, the noise is low, and the reliability is greatly improved due to the reduction of mechanical parts; and thirdly, the double-shaft double-power motor adopts a reluctance modulation effect to generate driving torque, the torque density is higher than that of a conventional permanent magnet motor, the power density of the system is further increased, and the energy consumption is reduced.

In addition, the fan provided in the above technical solution of the present invention may further have the following additional technical features:

in the above technical solution, preferably, the stator includes one set of stator winding or two sets of stator windings.

Specifically, one set of stator winding can be used for driving the reluctance rotor and the permanent magnet rotor to rotate independently, and two sets of stator windings can be used for driving the reluctance rotor and the permanent magnet rotor to rotate independently; under the condition that the stator comprises two sets of stator windings, the number of phases of the two sets of stator windings can be the same or different, so that the number of phases of the two sets of stator windings can be selected according to actual needs, and the practicability of the stator is improved.

In the above technical solution, preferably, the stator core includes a stator casing, and the stator casing is sleeved outside the stator core.

The stator casing can protect and insulate the stator core, so that the safety and reliability of the double-shaft double-power motor in the running process are improved.

In any one of the above technical solutions, preferably, the reluctance rotor includes a magnetic reluctance core and a non-magnetic spacer, and the reluctance core and the spacer are alternately arranged in an annular shape.

Therefore, the structure of the reluctance rotor can be simplified, and the processing and the manufacturing of the reluctance rotor are convenient.

In any one of the above technical solutions, preferably, the permanent magnet rotor includes a permanent magnet core and magnetic steel, the magnetic steel includes a plurality of magnetic steel pieces arranged along a circumferential direction of the permanent magnet core at intervals, and two adjacent magnetic steel pieces have opposite polarities.

Therefore, the permanent magnet rotor and the stator can rotate through electromagnetic induction.

In the above technical solution, preferably, the stator includes a set of stator winding, the reluctance rotor includes a reluctance core with magnetic conductivity and a spacer block with non-magnetic conductivity, the reluctance core and the spacer block are alternately arranged in a ring shape, and the number of the reluctance cores is p_rWinding span of the stator windingIs y_1sAnd form a number of pole pairs of p_sA rotating magnetic field, the permanent magnet rotor forms a pole pair number p_fThe permanent magnetic field of (a), wherein: p is a radical of_r＝|p_s±p_f|；p_f≠p_s。

In the above technical solution, preferably, the current injection frequency of the stator winding satisfies: omega_s＝p_rΩ_r-p_fΩ_fWherein ω is_sFor the control frequency, omega, of the stator winding_rAnd Ω_fThe mechanical rotation speeds of the reluctance rotor and the permanent magnet rotor respectively; the current injection phase angle of the stator winding satisfies: theta_s＝-p_rθ_r+p_fθ_fWherein theta_sBeing the phase angle, theta, of the axis of the injected current of the stator winding_fAnd theta_rThe mechanical angle difference of the alignment positions of the permanent magnet rotor and the reluctance rotor with the d axis is respectively.

In the above technical solution, preferably, the stator includes two sets of stator windings, the reluctance rotor includes a reluctance core with magnetic conductivity and a spacer block with non-magnetic conductivity, the reluctance core and the spacer block are alternately arranged in an annular shape, and the number of the reluctance cores is p_rThe winding span of the two sets of stator windings is y_1sAnd y_1adAnd respectively form a number of pole pairs of p_sAnd p_adThe permanent magnet rotor forms a pole pair number p_fThe permanent magnetic field of (a), wherein: p is a radical of_r＝|p_s±p_f|；p_ad＝p_f≠p_s；y_1s≠y_1ad。

In the above technical solution, preferably, the current injection frequencies of the two sets of stator windings respectively satisfy: omega_s＝p_rΩ_r-p_fΩ_f；ω_ad＝p_fΩ_fWherein ω is_sAnd ω_adControl frequency, omega, of two sets of windings respectively_rAnd Ω_fThe mechanical rotation speeds of the reluctance rotor and the permanent magnet rotor respectively; the current injection phase angles of the two sets of stator windings respectively meet the following conditions: theta_s＝-p_rθ_r+p_fθ_f；θ_ad＝-p_fθ_fWherein theta_sAnd theta_adThe phase angle, theta, of the axis of the injected current for each of the two sets of windings_fAnd theta_rThe mechanical angle difference of the alignment positions of the permanent magnet rotor and the reluctance rotor with the d axis is respectively.

In the above technical solution, preferably, one end of the first rotating shaft is provided with the first fan and the other end is connected to one of the reluctance rotor and the permanent magnet rotor which is located on the outer side, and one end of the second rotating shaft is provided with the second fan and the other end is connected to one of the reluctance rotor and the permanent magnet rotor which is located on the inner side; or one end of the first rotating shaft is provided with the first fan blade, the other end of the first rotating shaft is connected with the reluctance rotor and one of the permanent magnet rotors, which is positioned on the inner side, and one end of the second rotating shaft is provided with the second fan blade, and the other end of the second rotating shaft is connected with the reluctance rotor and one of the permanent magnet rotors, which is positioned on the outer side.

From this, can set up which one of magnetic resistance rotor and permanent magnet rotor and first pivot fixed connection, another and second pivot fixed connection according to actual need to the position of each part is rationally arranged to be convenient for.

In any of the above technical solutions, preferably, each of the first fan blade and the second fan blade includes at least one fan blade.

In other words, the first fan blade may have 1, 2, 3 or more fan blades, the second fan blade may also have 1, 2, 3 or more fan blades, and the number of the fan blades on the first fan blade is the same as or different from that on the second fan blade.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a fan according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a fan according to another embodiment of the present invention;

fig. 3 is a schematic structural diagram of a two-shaft dual-power motor according to an embodiment of the invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 3 is:

a fan 1;

a fan housing 10, a head 20;

a first fan blade 11, a second fan blade 12, a first rotating shaft 13 and a second rotating shaft 14;

the double-shaft double-power motor 21, the stator 211, the reluctance rotor 212 and the permanent magnet rotor 213;

stator core 2111, stator winding 2112, stator casing 2113, reluctance core 2121, spacer 2122, magnetic steel 2131 and permanent magnet core 2132;

a first bearing 31, a second bearing 32, a first transmission shaft 33 and a second transmission shaft 34.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A fan according to some embodiments of the present invention is described below with reference to fig. 1 to 3.

As shown in fig. 1 to 3, a fan 1 according to some embodiments of the present invention includes: the fan comprises a fan cover 10, a head 20, a double-shaft double-power motor 21, a first fan blade 11, a second fan blade 12, a first rotating shaft 13 and a second rotating shaft 14, wherein the double-shaft double-power motor 21 is installed inside the head 20, and the fan cover 10 and the double-shaft double-power motor 21 are coaxially installed.

Specifically, the double-shaft dual-power motor 21 includes an annular stator 211, a reluctance rotor 212 and a permanent magnet rotor 213, where the stator 211, the reluctance rotor 212 and the permanent magnet rotor 213 are sequentially nested from inside to outside or from outside to inside, that is, the reluctance rotor 212 is always located between the stator 211 and the permanent magnet rotor 213, the stator 211 may be located outside the reluctance rotor 212 and the permanent magnet rotor 213 is located inside the reluctance rotor 212, or the stator 211 is located inside the reluctance rotor 212 and the permanent magnet rotor 213 is located outside the reluctance rotor 212; and the stator 211, the reluctance rotor 212 and the permanent magnet rotor 213 can rotate mutually, and every two adjacent ones of the stator 211, the reluctance rotor 212 and the permanent magnet rotor 213 are spaced by an air gap, in other words, the stator 211 and the reluctance rotor 212 have an air gap spacing therebetween, and the reluctance rotor 212 and the permanent magnet rotor 213 also have an air gap spacing therebetween, so as to ensure the rotational independence among the stator 211, the reluctance rotor 212 and the permanent magnet rotor 213.

Further, as shown in fig. 3, the stator 211 includes: a stator core 2111 and a stator winding 2112, wherein the stator core is made of a high-permeability material, the stator winding 2112 is wound on the stator core, as shown in fig. 1 and 2, one of the reluctance rotor 212 and the permanent magnet rotor 213 is relatively fixedly connected with the first rotating shaft 13 for driving the first rotating shaft 13 to rotate, and the other of the reluctance rotor 212 and the permanent magnet rotor 213 is relatively fixedly connected with the second rotating shaft 14 for driving the second rotating shaft 14 to rotate; and first pivot 13 and second pivot 14 all stretch into fan housing 10 inner chamber, and second pivot 14 passes first pivot 13 middle part hollow department and stretches out, installs first fan 11 on first pivot 13, installs second fan 12 on second pivot 14, and magnetic resistance rotor 212 and permanent magnet rotor 213 independently drive first pivot 13 and second pivot 14 respectively and rotate, and first pivot 13 and second pivot 14 are rotatory with the axle center to realize that first fan 11 of installing on first pivot 13 and second fan 12 of installing on second pivot 14 are rotatory with the axle center, increase air supply amount, promote the air supply effect.

That is, when the reluctance rotor 212 is fixedly connected to the first rotating shaft 13 through the first transmission shaft 33 (or the second transmission shaft 34) and drives the first rotating shaft 13 to rotate, and further drives the first fan blade 11 to rotate, the permanent magnet rotor 213 is fixedly connected to the second rotating shaft 14 through the second transmission shaft 34 (or the first transmission shaft 33) and drives the second rotating shaft 14 to rotate, and further drives the second fan blade 12 to rotate; when the reluctance rotor 212 is fixedly connected to the second rotating shaft 14 through the first transmission shaft 33 (or the second transmission shaft 34) and drives the second rotating shaft 14 to rotate, and further drives the second fan 12 to rotate, the permanent magnet rotor 213 is fixedly connected to the first rotating shaft 13 through the second transmission shaft 34 (or the first transmission shaft 33) and drives the first rotating shaft 13 to rotate, and further drives the first fan 11 to rotate, so that the first fan 11 and the second fan 12 rotate coaxially.

In a specific embodiment, as shown in fig. 1, the stator 211 is located outside the reluctance rotor 212, the stator 211, the reluctance rotor 212 and the permanent magnet rotor 213 are sequentially nested from outside to inside, the reluctance rotor 212 is fixedly connected to the first rotating shaft 13 through the first transmission shaft 33 and drives the first rotating shaft 13 to rotate, thereby driving the first fan blade 11 to rotate, and the permanent magnet rotor 213 is directly and fixedly connected to the second rotating shaft 14 and drives the second rotating shaft 14 to rotate, thereby driving the second fan blade 12 to rotate; the first transmission shaft 33 may be integrally formed with the first rotation shaft 13, or may be two pieces fixedly connected.

In another embodiment, as shown in fig. 2, the stator 211 is located inside the reluctance rotor 212, the stator 211, the reluctance rotor 212 and the permanent magnet rotor 213 are sequentially nested from inside to outside, the reluctance rotor 212 is fixedly connected to the second rotating shaft 14 through the first transmission shaft 33 and drives the second rotating shaft 14 to rotate, so as to drive the second fan blades 12 to rotate, and the permanent magnet rotor 213 is fixedly connected to the first rotating shaft 13 through the second transmission shaft 34 and drives the first rotating shaft 13 to rotate, so as to drive the first fan blades 11 to rotate; it should be noted that the second transmission shaft 34 may be integrally formed with the first rotation shaft 13, or may be two fixedly connected members.

Of course, the first rotating shaft 13 may be connected to the inner one of the reluctance rotor 212 and the permanent magnet rotor 213, and the second rotating shaft 14 may be connected to the outer one of the reluctance rotor 212 and the permanent magnet rotor 213, specifically, the first rotating shaft 13 may be directly connected to the inner one of the reluctance rotor 212 and the permanent magnet rotor 213, and the second rotating shaft 14 may be connected to the outer one of the reluctance rotor 212 and the permanent magnet rotor 213 through a transmission shaft.

According to the fan 1, double-power food crushing is realized in a mode without mechanical differential and clutch, the system integration level is high, the energy consumption is low, and the reliability is greatly improved due to the reduction of mechanical parts. In addition, the double-shaft double-power motor 21 adopts a reluctance modulation effect to generate driving torque, the torque density is higher than that of a conventional permanent magnet motor, the power density of the system is further increased, and the energy consumption is reduced.

As shown in fig. 1 and 2, in order to ensure smooth rotation of the first and second shafts 13 and 14, a first bearing 31 is installed between the first and second shafts 13 and 14, and a second bearing 32 is installed between the outer side of the first shaft 13 and the wind cover 10 and the head 20.

Further, the stator 211 may include one set of stator windings 2112 or two sets of stator windings 2112.

Specifically, the number of phases of the two sets of stator windings 2112 is the same or different, so that the number of phases of the two sets of stator windings 2112 can be selected according to actual needs, and the practicability of the stator 211 is improved.

Advantageously, as shown in fig. 3, when the stator 211 is located at the outer side of the reluctance rotor 212, the stator core 2111 includes a stator casing 2113, the stator casing 2113 is sleeved at the outer side of the stator core 2111, and the stator casing 2113 can protect and insulate the stator core 2111, thereby improving the safety and reliability of the dual-shaft dual-power motor 21 during operation.

In some embodiments of the present invention, as shown in fig. 3, the reluctance rotor 212 includes a magnetic conductive reluctance core 2121 and a non-magnetic conductive spacer 2122, and the reluctance core 2121 and the spacer 2122 are alternately arranged in a ring shape, so that the structure of the reluctance rotor 212 may be simplified and the manufacturing process may be facilitated.

In some embodiments of the present invention, as shown in fig. 3, the permanent magnet rotor 213 includes a permanent magnet core 2132 and a magnetic steel 2131, where the magnetic steel 2131 may include a plurality of magnetic steels 2131, and the magnetic steels 2131 are arranged at intervals along a circumferential direction of the permanent magnet core 2132, and polarities of two adjacent magnetic steels 2131 are opposite, thereby facilitating the permanent magnet rotor 213 and the stator 211 to rotate the permanent magnet rotor 213 through electromagnetic induction.

In the inventionIn some embodiments, as shown in fig. 3, the stator 211 includes a set of stator windings 2112, the reluctance rotor 212 includes a magnetic reluctance core 2121 and a non-magnetic spacer 2122, the reluctance core 2121 and the spacer 2122 are alternately arranged in a ring shape, and the number of the reluctance cores 2121 is p_rThe winding span of the stator winding 2112 is y_1sAnd form a number of pole pairs of p_sThe permanent magnet rotor 213 forms a pole pair number p by rotating the magnetic field_fThe permanent magnetic field of (a), wherein: p is a radical of_r＝|p_s±p_f|；p_f≠p_s。

Further, the current injection frequency of the stator winding 2112 satisfies: omega_s＝p_rΩ_r-p_fΩ_fWherein ω is_sFor the control frequency, omega, of the stator windings 2112_rAnd Ω_fThe mechanical rotation speeds of the reluctance rotor 212 and the permanent magnet rotor 213, respectively, the current injection phase angle of the stator winding 2112 satisfies: theta_s＝-p_rθ_r+p_fθ_fWherein theta_sIs the phase angle, θ, of the axis of the injected current of the stator winding 2112_fAnd theta_rThe mechanical angle difference between the aligned positions of the permanent magnet rotor 213 and the reluctance rotor 212 with respect to the d-axis, respectively.

In other embodiments of the present invention, the stator 211 comprises two sets of stator windings 2112, which are respectively referred to as a first winding and a second winding, the reluctance rotor 212 comprises a magnetic reluctance core 2121 and a non-magnetic spacer 2122, the reluctance core 2121 and the spacer 2122 are alternately arranged in a ring shape, and the number of the reluctance cores 2121 is p_rThe winding span of the first stator winding is y_1sAnd form a number of pole pairs of p_sThe winding span of the second stator winding is y_1adAnd form a number of pole pairs of p_adThe permanent magnet rotor 213 forms a pole pair number p_fThe permanent magnetic field of (a), wherein: p is a radical of_r＝|p_s±p_f|；p_ad＝p_f≠p_s；y_1s≠y_1ad。

Further, the current injection frequencies of the first winding and the second winding respectively satisfy: omega_s＝p_rΩ_r-p_fΩ_f；ω_ad＝p_fΩ_fWherein ω is_sAnd ω_adControl frequency, omega, of the first and second windings, respectively_rAnd Ω_fThe mechanical rotational speeds of the reluctance rotor 212 and the permanent magnet rotor 213, respectively; the current injection phase angles of the first winding and the second winding respectively satisfy the following conditions: theta_s＝-p_rθ_r+p_fθ_f；θ_ad＝-p_fθ_fWherein theta_sAnd theta_adPhase angle of the axis of the injected current, theta, of the first and second windings, respectively_fAnd theta_rThe mechanical angle difference between the aligned positions of the permanent magnet rotor 213 and the reluctance rotor 212 with respect to the d-axis, respectively, thereby facilitating the decoupling control of the reluctance rotor 212 and the permanent magnet rotor 213.

In some embodiments of the present invention, as shown in fig. 1 and fig. 2, each of the first fan blade 11 and the second fan blade 12 includes at least one fan blade, in other words, the first fan blade 11 may have 1, 2, 3 or more fan blades, the second fan blade 12 may also have 1, 2, 3 or more fan blades, and the number of the fan blades on the first fan blade 11 is the same as or different from the number of the fan blades on the second fan blade 12.

The fan 1 provided by the invention adopts a double-rotating-shaft double-power rotating structure, the rotating directions of a first rotating shaft 13 and a second rotating shaft 14 are the same or opposite, the rotating speeds of the first rotating shaft 13 and the second rotating shaft 14 are the same or different, further, the first rotating shaft 13 drives a first fan blade 11 to rotate, and the second rotating shaft 14 drives a second fan blade 12 to rotate; meanwhile, compared with the existing scheme that two motors are axially connected in series to output double rotating speeds, the length, the weight and the cost of the head are reduced; secondly, double dynamical crushing food has been realized to the mode that adopts no mechanical differential, does not have the separation and reunion, and the system integrated level is high, the energy consumption is low to because the reliability of the reduction of mechanical parts promotes greatly.