Self-starting synchronous reluctance motor

Abstract

The self-starting synchronous reluctance motor comprises a stator, the stator comprises a plurality of stator teeth, and a stator slot is formed between two adjacent stator teeth, the stator slot has a stator slot bottom diameter D Y , the stator slot bottom diameter D Y is the diameter of the slot bottom of the stator slot along the radial direction of the stator, the stator outer circle diameter D O is the diameter of the outer circle of the stator, and the ratio between the stator slot bottom diameter D Y and the stator outer circle diameter D O satisfies: the stator slot ratio satisfies: further comprising a rotor, the rotor is located on the radial inner side of the stator, the rotor further comprises a rotor shaft hole located on the radial inner side thereof, the diameter of the rotor shaft hole is D SFT , and D SFT and D O satisfy the relationship according to the present disclosure. The magnetic circuit can be reasonably distributed, the output torque can reach the maximum range, and the overload capacity can be improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electric machines, in particular to a self-starting synchronous reluctance motor. BACKGROUND

[0002] The self-starting synchronous reluctance motor has the characteristics of asynchronous motor and synchronous reluctance motor, and has the following basic characteristics:

[0003] Air slots are formed in the rotor along the axial direction, the air slots are referred to as magnetic barrier slots, and the part of the iron core formed between every two layers of magnetic barrier slots is referred to as a magnetic flux guide channel;

[0004] The magnetic barrier slots are filled with electrically conductive and non-magnetic conductive material (for example, aluminum) in whole or in part, which is referred to as a bar;

[0005] The rotor has end rings at the two axial ends, the material of the end rings is the same as that of the bars, the end rings at the two ends of the rotor are connected with all or part of the bars in the rotor slots to form a short-circuit loop;

[0006] The self-starting synchronous reluctance motor has the advantages of asynchronous motor, i.e., direct starting without a frequency converter, no magnetic steel in the rotor, and high reliability, and the advantages of synchronous reluctance motor, i.e., stable operation in synchronization, high efficiency, and high power density. In the industrial field, the IE4 energy efficiency of the fixed-frequency motor is broken through, and the cost is lower.

[0007] The 2-pole self-starting synchronous reluctance motor has a wide magnetic circuit, and the stator yoke part and the rotor magnetic circuit in the main magnetic circuit are prone to saturation. In order to improve the starting capacity, the filling amount of the rotor conductor needs to be increased, especially the filling amount of the Q-axis conductor. Since the Q-axis magnetic barrier slot and the rotor shaft hole both compress the Q-axis magnetic circuit space, the Q-axis magnetic circuit is prone to saturation, and the torque output and the efficiency are difficult to improve.

[0008] Since the self-starting synchronous reluctance motor in the prior art has the technical problems of poor magnetic circuit, low motor torque output, low overload capacity, and low motor efficiency, the present disclosure designs a self-starting synchronous reluctance motor.

[0009] SUMMARY

[0010] Therefore, the technical problem to be solved by the present disclosure is to overcome the defects of the self-starting synchronous reluctance motor in the prior art, i.e., poor magnetic circuit, low motor torque output, low overload capacity, and low motor efficiency, so as to provide a self-starting synchronous reluctance motor.

[0011] In order to solve the above problems, the present disclosure provides a self-starting synchronous reluctance motor, which comprises:

[0012] A stator comprising a plurality of stator teeth, and a stator slot is formed between adjacent two stator teeth, the stator slot has a stator slot bottom diameter D Y, the diameter of the bottom of the stator slot along the radial direction of the stator Y , the diameter of the outer circle of the stator, and the diameter of the bottom of the stator slot D O , the diameter of the outer circle of the stator, and the diameter of the bottom of the stator slot D Y , the diameter of the outer circle of the stator, and the diameter of the bottom of the stator slot D O , the diameter of the outer circle of the stator, and the diameter of the bottom of the stator slot D , the diameter of the inner end of the stator tooth along the radial direction of the stator, and the ratio between the diameter of the inner circle of the stator DS and the diameter of the outer circle of the stator D S , the diameter of the inner end of the stator tooth along the radial direction of the stator, and the ratio between the diameter of the inner circle of the stator DS and the diameter of the outer circle of the stator D O , the diameter of the inner end of the stator tooth along the radial direction of the stator, and the ratio between the diameter of the inner circle of the stator DS and the diameter of the outer circle of the stator D , the diameter of the inner end of the stator tooth along the radial direction of the stator, and the ratio between the diameter of the inner circle of the stator DS and the diameter of the outer circle of the stator D SFT , the diameter of the inner end of the stator tooth along the radial direction of the stator, and the ratio between the diameter of the inner circle of the stator DS and the diameter of the outer circle of the stator D SFT , the diameter of the inner end of the stator tooth along the radial direction of the stator, and the ratio between the diameter of the inner circle of the stator DS and the diameter of the outer circle of the stator D O , the diameter of the inner end of the stator tooth along the radial direction of the stator, and the ratio between the diameter of the inner circle of the stator DS and the diameter of the outer circle of the stator D

[0013] In some embodiments, the stator tooth width W T is the circumferential width of the stator tooth, and the stator slot width W S is the circumferential width of the stator slot, and

[0014] In some embodiments, the stator slot width is: the circumferential width at the radial direction 1 / 2 length of the stator slot, i.e. the circumferential width at the circular arc position with a radius of .

[0015] In some embodiments, the stator further comprises a stator yoke portion, which is the core portion between the outer circle of the stator and the bottom of the stator slot, and the radial width of the stator yoke portion is (D O -D Y ) / 2; the ratio between the total sum of the 1 / 2 stator tooth width per pole and the width of the stator yoke portion satisfies: , wherein N S is the number of stator slots, and p is the number of rotor pole pairs.

[0016] In some embodiments, air slots are provided on the rotor to form a magnetic barrier layer, and the rotor core comprises a D-axis and a Q-axis; the portion between two adjacent layers of the magnetic barrier layer is a magnetic flux channel layer; the width of each magnetic flux channel layer in the D-axis direction or parallel to the D-axis direction is Wd1, Wd2,..., Wdn in sequence, n≥1, and , wherein Ns is the number of stator slots, and p is the number of rotor pole pairs.

[0017] In some embodiments, a rotor is further included, which is located radially inside the stator, and the rotor is provided with air slots to form a magnetic barrier layer, according to the shape of the magnetic barrier layer, a radial direction parallel to the magnetic barrier layer is referred to as a D-axis, and a radial direction perpendicular to the magnetic barrier layer is referred to as a Q-axis; a portion between two adjacent magnetic barrier layers is a magnetic flux channel layer; the width of each magnetic flux channel layer on the Q-axis is Wq1, Wq2,..., Wqn in sequence, n≥1, and the ratio of the total of the 1 / 2 stator tooth width per pole to the total of the Q-axis magnetic flux channel width satisfies wherein N S is the number of stator slots, and p is the number of rotor pole pairs.

[0018] In some embodiments, the width of each magnetic barrier layer on the D-axis is Bd1, Bd2,..., Bdn in sequence; and the width of each magnetic barrier layer on the Q-axis is Bq1, Bq2,..., Bqn in sequence.

[0019] In some embodiments, the rotor is axially stacked by rotor lamination sheets;

[0020] The magnetic barrier layer is divided into multiple layers along the Q-axis, and the magnetic barrier layer close to the radial outer circle relative to the axis of the rotor is a filling slot; the filling slot is filled with a conductive and non-magnetic material, i.e., a conducting strip;

[0021] The conducting strip is a cast aluminum structure, which is formed in the filling slot by casting;

[0022] The rotor is provided with an end ring composed of a conductive and non-magnetic material at both axial ends, and all or part of the conducting strips are short-circuited together through the end ring to form a loop.

[0023] The self-starting synchronous reluctance motor provided by the present disclosure has the following beneficial effects:

[0024] 1. The present disclosure satisfies the following condition by setting the ratio between the diameter D Y of the stator slot bottom and the diameter D O of the stator outer circle as follows: The ratio between the diameter D Y of the stator slot bottom and the diameter D O of the stator outer circle can be effectively constrained, and the magnetic circuit of the stator and rotor can be reasonably distributed; the greater the ratio of the diameter of the stator slot bottom, the narrower the magnetic circuit of the stator yoke, and the smaller the torque output; the smaller the ratio of the diameter of the stator slot bottom, when reduced to a certain extent, the rotor space will be compressed, and the torque output will not increase or even decrease; therefore, the ratio between the diameter D Y of the stator slot bottom and the diameter D O of the stator outer circle is constrained between 0.65 and 0.85, which can reasonably distribute the magnetic circuit to maximize the output torque and improve the overload capacity; and the ratio between the diameter D S of the stator inner circle and the diameter D O of the stator outer circle is referred to as a stator split ratio, and the stator split ratio satisfies: The stator slot ratio can be effectively constrained, and the stator and rotor magnetic circuits are reasonably distributed. With the increase of the slot ratio, the outer diameter of the rotor increases, and the torque output increases. When the stator space is limited and the torque output does not increase or even decreases, the ratio between D S and D O is constrained between 0.45 and 0.65, the magnetic circuit can be reasonably distributed, the output torque reaches the maximum range, and the overload capacity is improved. The relationship between D SFT and D O is satisfied Since the size of the shaft is too large to compress the Q-axis magnetic circuit space, the shaft diameter is minimized under the premise of ensuring the structural strength of the shaft, and therefore the above size setting can effectively ensure that the Q-axis magnetic circuit space is not compressed by the shaft hole, and the magnetic circuit is affected, thereby further improving the torque output and improving the efficiency of the motor.

[0025] 2. The disclosure also constrains the ratio of the stator tooth width W T and the stator slot width W S to be Since the stator slot width is conducive to reducing copper loss, and the stator tooth width is conducive to reducing iron loss, the disclosure can effectively reduce iron loss and copper loss at the same time, and balance the stator tooth width and slot width to optimize the overall efficiency.

[0026] 3. The disclosure also satisfies the ratio of the sum of the lower 1 / 2 stator tooth width and the stator yoke width as follows: Since the stator yoke, the rotor D-axis magnetic flux channel, the rotor Q-axis magnetic flux channel, and the stator tooth part constitute the main magnetic circuit, any part of the main magnetic circuit that is too narrow will cause the magnetic circuit to saturate prematurely, and the overload capacity will be insufficient. Therefore, the ratio of the sum of the lower 1 / 2 stator tooth width and the stator yoke width of the disclosure can effectively constrain the relationship between the stator yoke and the stator tooth part, effectively ensure that the magnetic circuit does not saturate prematurely, improve the rated load and overload efficiency, and improve the overload capacity. The disclosure also satisfies the ratio of the sum of the lower 1 / 2 stator tooth width and the stator yoke width as follows: The ratio of the sum of the lower 1 / 2 stator tooth width and the stator yoke width can effectively constrain the relationship between the rotor D-axis magnetic flux channel and the stator tooth part, and can further effectively ensure that the magnetic circuit does not saturate prematurely, improve the rated load and overload efficiency, and improve the overload capacity. The disclosure also satisfies the ratio of the sum of the lower 1 / 2 stator tooth width and the stator yoke width as follows: The ratio of the sum of the lower 1 / 2 stator tooth width and the stator yoke width can effectively constrain the relationship between the rotor Q-axis magnetic flux channel and the stator tooth part, and can further effectively ensure that the magnetic circuit does not saturate prematurely, improve the rated load and overload efficiency, and improve the overload capacity. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic diagram of the stator structure of the self-starting synchronous reluctance motor of the disclosure;

[0028] Figure 2 is a schematic diagram of the size relationship of the stator of the self-starting synchronous reluctance motor of the disclosure; ​

[0029] Figure 3 Structure diagram of a rotor of a self-starting synchronous reluctance motor according to the present disclosure;

[0030] Figure 4 Size relationship diagram of a rotor of a self-starting synchronous reluctance motor according to the present disclosure;

[0031] Figure 5 Main magnetic circuit structure diagram of a self-starting synchronous reluctance motor (including a stator and a rotor) according to the present disclosure;

[0032] Figure 6 Curve diagram of the ratio of the diameter of the bottom of a stator slot of a motor according to the present disclosure to the torque output and the slot ratio;

[0033] Figure 7 Curve diagram of the ratio of the stator tooth width to the stator slot width of a motor according to the present disclosure to the motor efficiency;

[0034] Figure 8 Curve diagram of the ratio of the stator yoke to the stator tooth width of a motor according to the present disclosure to the torque output;

[0035] Figure 9 Structure diagram of a bar and an end ring according to the present disclosure.

[0036] The reference signs are as follows:

[0037] 1, stator; 11, stator tooth; 12, stator slot; 13, stator yoke; 2, rotor; 20, rotor shaft hole; 3, magnetic barrier layer; 4, magnetic flux channel layer; 5, bar; 6, end ring; 7, air gap. DETAILED DESCRIPTION

[0038] As shown in Figures 1-9 , the present disclosure provides a self-starting synchronous reluctance motor, which comprises:

[0039] a stator 1, which comprises a plurality of stator teeth 11, and a stator slot 12 is formed between any two adjacent stator teeth 11, the stator slot 12 has a stator slot bottom diameter D Y , the stator slot bottom diameter D Y is the diameter of the slot bottom of the stator slot 12 along the radial direction of the stator; the outer diameter D O of the stator 1 is the diameter of the outer circle of the stator 1, and the ratio between the stator slot bottom diameter D Y and the outer diameter D O of the stator satisfies: the inner diameter D S of the stator is the diameter of the radial inner end of the stator tooth 11 along the radial direction of the stator, and the ratio between the inner diameter D S of the stator and the outer diameter D O of the stator is the stator slot ratio, and the stator slot ratio satisfies: Also included is a rotor 2 located radially inside the stator, the rotor 2 also including a rotor shaft hole 20 located radially inside the rotor 2, the rotor shaft hole 20 having a diameter D SFT , and D SFT satisfying the relationship O The present disclosure satisfies the ratio between the stator slot bottom diameter D Y and the stator outer circle diameter D O : The ratio of the stator slot bottom diameter to the stator outer circle can be effectively constrained, and the stator-rotor magnetic circuit can be reasonably distributed. The larger the slot bottom diameter ratio, the narrower the stator yoke magnetic circuit, and the smaller the torque output. The smaller the slot bottom diameter ratio, when reduced to a certain extent, the rotor space is compressed, and the torque output does not increase or even decreases. Therefore, the present disclosure constrains the ratio between D Y and D O between 0.65 and 0.85, which can reasonably distribute the magnetic circuit to maximize the output torque and improve the overload capacity. The ratio of the stator inner circle diameter D S to the stator outer circle diameter D O satisfies: The stator split ratio can be effectively constrained, and the stator-rotor magnetic circuit can be reasonably distributed. As the split ratio increases, the rotor outer diameter increases, and the torque output increases. Due to the limited stator space, increasing to a certain extent, the torque output does not increase or even decreases. Therefore, the present disclosure constrains the ratio between D S and D O between 0.45 and 0.65, which can reasonably distribute the magnetic circuit to maximize the output torque and improve the overload capacity. Increasing the stator inner circle, the yoke width is correspondingly reduced, and the torque output decreases to a certain extent. The ratio between D Due to the excessive size of the rotor shaft, the Q-axis magnetic circuit space is compressed. Under the premise of ensuring the structural strength of the rotor shaft, the diameter of the rotor shaft is as small as possible. Therefore, the above size setting can effectively ensure that the Q-axis magnetic circuit space is not compressed by the rotor shaft hole, which affects the magnetic circuit and further improves the torque output and improves the motor efficiency.

[0040] As shown in Figure 6 , the slot bottom diameter ratio and the split ratio have beneficial effects (the larger the split ratio, the larger the torque output, and increasing to a certain extent, the trend slows down; the larger the slot bottom diameter ratio, the narrower the stator yoke magnetic circuit, and the smaller the torque output, and decreasing to a certain extent, the trend slows down).

[0041] The motor described in the present disclosure is designed comprehensively to ensure that the stator-rotor magnetic circuit is unobstructed, thereby improving the motor torque output and overload capacity and optimizing the motor efficiency.

[0042] 1. The present disclosure provides constraints on the stator slot bottom diameter, the ratio of the stator inner circle to the stator outer circle, a reasonable allocation of the stator and rotor magnetic circuit, an accurate design of the main magnetic circuit, a guarantee of the main magnetic circuit, a guarantee of the stator crack ratio, an improvement of the output, a guarantee of the stator yoke width, and an avoidance of premature saturation.

[0043] 2. The present disclosure constrains the ratio of the rotor shaft hole to the stator outer circle, releases the Q-axis magnetic circuit space, and guarantees the rotor structural strength. The Q-axis magnetic circuit space can be improved while guaranteeing the structural strength of the rotor shaft.

[0044] 3. The present disclosure constrains the ratio of the stator tooth width to the slot width, guarantees the stator slot area, and optimizes the copper and iron loss ratio. That is, the copper and iron loss ratio is optimized by adjusting the stator magnetic circuit and the slot area.

[0045] 4. The present disclosure constrains the sum of the stator yoke width, the stator tooth width, and the rotor magnetic circuit width on the main magnetic circuit, guarantees that there is no short board in the main magnetic circuit, avoids premature saturation, and improves the overload capacity.

[0046] Key words:

[0047] 1. Stator slot bottom diameter: the diameter of the outermost edge of the stator slot in the radial direction;

[0048] 2. Stator yoke: the part of the core between the stator outer circle and the stator slot bottom diameter;

[0049] 3. Stator crack ratio: the ratio of the stator inner circle to the stator outer circle;

[0050] 4. Rotor magnetic barrier: each layer of air slots on the rotor;

[0051] 5. Rotor magnetic flux channel: the part between the layers of air slots on the rotor is called the magnetic flux channel layer;

[0052] 6. D-axis / Q-axis: according to the shape of the air slot, the radial direction parallel to the air slot is called the D-axis, and the radial direction perpendicular to the air slot is called the Q-axis;

[0053] 7. Stator slot width: the middle position of the stator slot, that is, the position of the circular arc with a radius of

[0054] 8. Main magnetic circuit: the effective path of magnetic flux in the motor, including the stator yoke, the stator tooth, the air gap, the rotor D-axis magnetic flux channel, and the rotor Q-axis magnetic flux channel.

[0055] In some embodiments, the stator tooth width W T is the circumferential width of the stator tooth 11, the stator slot width W S is the circumferential width of the stator slot 12, and The present disclosure also constrains the stator tooth width W T and the stator slot width W S in the range of​ Since a wider stator slot helps reduce copper losses and a wider stator tooth helps reduce iron losses, this disclosure... At the same time, it can effectively reduce iron loss and copper loss, balance the stator tooth width and slot width, and make the overall machine efficiency optimal.

[0056] like Figure 7 As shown, the beneficial effects of the stator tooth width / stator slot width ratio are illustrated (when the stator slot width / stator tooth width ratio is reasonable, the ratio of copper loss to iron loss is close to 1:1, at which point the efficiency is optimal). Slot width results in a larger winding cross-sectional area, lower resistance, and lower copper loss; tooth width results in a wider magnetic circuit, making it less prone to saturation and lowering iron loss.

[0057] In some embodiments, the stator slot width is the circumferential width at half the radial length of the stator slot 12, i.e., ... The circumferential width of the arc with radius .

[0058] In some embodiments, the stator 1 further includes a stator yoke 13, which is the iron core portion between the outer circle of the stator and the bottom of the stator slot, and the radial width of the stator yoke 13 is (D O -D Y ) / 2; The ratio of the total width of the lower 1 / 2 stator teeth per pole to the width of the stator yoke satisfies: Where N S denoted by , where is the number of stator slots and p is the number of rotor pole pairs.

[0059] This disclosure further satisfies the following condition by dividing the ratio of the sum of the widths of the lower 1 / 2 stator teeth to the width of the stator yoke: Since the stator yoke, rotor D-axis magnetic channel, rotor Q-axis magnetic channel, and stator teeth constitute the main magnetic circuit, if any part of the main magnetic circuit is too narrow, it will cause premature saturation of the magnetic circuit and insufficient overload capacity; therefore, this disclosure... It can effectively constrain the relationship between the stator yoke and the stator teeth, effectively ensure that the magnetic circuit does not saturate prematurely, improve rated load and heavy load efficiency, and improve overload capacity.

[0060] like Figure 8 As shown, the beneficial effects of the ratio of stator yoke width to stator tooth width are as follows: (the stator yoke and stator tooth width are part of the main magnetic circuit. If any part of the main magnetic circuit is too narrow, the magnetic circuit will saturate prematurely and the overload capacity will be insufficient. As the magnetic circuit becomes balanced, the overload capacity will increase. To a certain extent, the growth trend of overload capacity will slow down or even weaken slightly).

[0061] In some embodiments, a rotor 2 is further included, which is located radially inside the stator, and air slots are formed on the rotor 2 to form a magnetic barrier layer 3, according to the shape of the magnetic barrier layer 3, the high-permeability direction is the D-axis, the low-permeability direction is the Q-axis, two adjacent rotor poles are symmetric about the D-axis, and the same pole is symmetric about the Q-axis; the width of each magnetic flux channel layer 4 in the D-axis or parallel direction is Wd1, Wd2,..., Wdn, n≥1, and has where NS is the number of stator slots, and p is the number of rotor pole pairs. The present disclosure further comprises which can effectively constrain the relationship between the rotor D-axis magnetic flux channel and the stator tooth portion, and can further effectively ensure that the magnetic circuit does not saturate in advance, improve the rated load and heavy load efficiency, and improve the overload capacity.

[0062] In some embodiments, a rotor 2 is further included, which is located radially inside the stator, and air slots are formed on the rotor 2 to form a magnetic barrier layer 3, according to the shape of the magnetic barrier layer 3, the radial direction parallel to the magnetic barrier layer 3 is called the D-axis, and the radial direction perpendicular to the magnetic barrier layer 3 is called the Q-axis; the part between two adjacent magnetic barrier layers 3 is a magnetic flux channel layer 4; the width of each magnetic flux channel layer 4 in the Q-axis is Wq1, Wq2,..., Wqn, n≥1, and has where NS is the number of stator slots, and p is the number of rotor pole pairs.

[0063] The present disclosure further comprises which can effectively constrain the relationship between the rotor Q-axis magnetic flux channel and the stator tooth portion, and can further effectively ensure that the magnetic circuit does not saturate in advance, improve the rated load and heavy load efficiency, and improve the overload capacity.

[0064] In some embodiments, the width of each magnetic barrier layer in the D-axis is Bd1, Bd2,..., Bdn, and the width of each magnetic barrier layer in the Q-axis is Bq1, Bq2,..., Bqn.

[0065] In some embodiments, the rotor 2 is axially stacked by rotor lamination; the number of groups of the magnetic barrier layer 2 is the number of poles of the motor rotor, as shown in the drawings of the present disclosure, including 2 poles above and below the D-axis, i.e., 2 poles above the D-axis and 2 poles below the D-axis;

[0066] The magnetic barrier layer 3 is divided into multiple layers along the Q-axis, and the magnetic barrier layer 3 close to the radial outer circle relative to the axis of the rotor is a filling slot; the filling slot is filled with a conductive and non-magnetic material, i.e., a conductor 5;

[0067] The conductor 5 is a cast aluminum structure, which is formed in the filling slot by casting;

[0068] The axial ends of the rotor 2 are provided with end rings 6 made of electrically conductive and magnetically non-conductive material, and all or part of the conductive bars 5 are short-circuited together through the end rings 6 to form a loop.

[0069] The motor described in the present disclosure can adopt full-magnetic-barrier-slot cast aluminum or partial-magnetic-barrier-slot cast aluminum;

[0070] The motor end ring described in the present disclosure can be a circular ring or other regular or irregular shape.

[0071] The motor described in the present disclosure has a stator core formed by axially stacking stator laminations, and a rotor core formed by axially stacking rotor laminations;

[0072] The stator core is circular, and a circle of stator slots 12 is evenly distributed along the inner circle of the circular ring, and the two stator slots 12 are evenly distributed with stator teeth 11 in between;

[0073] The radially outermost edge of the stator slot and the middle of the stator outer circle are the stator yoke 13;

[0074] The diameter of the stator outer circle is D O , the radially outer circle of the stator slot is called the slot bottom diameter D Y , the stator inner circle is D S , the stator tooth width is W T , the stator slot width is W S , the middle position of the stator slot is counted, that is, , and the total number of stator slots is N S ;

[0075] The rotor core is circular, the stator core and the rotor core are coaxially arranged, the stator inner circle is larger than the rotor outer circle, and the circular arc air gap formed by the stator inner circle and the rotor outer circle is called the air gap 7;

[0076] The rotor core is provided with a plurality of groups of identical air slots, and the number of air slot groups is equal to the number of rotor poles;

[0077] Part or all of the air slots are filled with electrically conductive and magnetically non-conductive material, which is called a conductive bar 5;

[0078] The two ends of the rotor are provided with end rings 6 made of electrically conductive and magnetically non-conductive material;

[0079] All or part of the conductive bars are short-circuited together through the end rings to form a loop;

[0080] The air slots are divided into multiple layers along the Q-axis, according to the shape of the air slots, the radial direction parallel to the air slots is called the D-axis, and the radial direction perpendicular to the air slots is called the Q-axis, and the number of layers of rotor magnetic barriers under each pole is N B ;

[0081] Each layer of air slots on the rotor is called a magnetic barrier layer 3, and the part between the adjacent two layers of air slots is called a magnetic flux channel layer 4;

[0082] The width of each magnetic barrier layer on the D-axis is Bd1, Bd2,..., Bdn; the width of each magnetic barrier layer on the Q-axis is Bq1, Bq2,..., Bqn;

[0083] The width of each magnetic channel layer on the D-axis is Wd1, Wd2,..., Wdn; the width of each magnetic channel layer on the Q-axis is Wq1, Wq2,..., Wqn;

[0084] The inner circle of the rotor core is the shaft hole D SFT ;

[0085] The number of stator slots is NS, and the number of rotor magnetic barrier layers under each pole is N B .

[0086] The above only describes the preferred embodiments of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure. The above only describes the preferred embodiments of the present disclosure, and it should be noted that, for ordinary skilled persons in the technical field, several improvements and modifications can be made without departing from the technical principles of the present disclosure, and these improvements and modifications shall be regarded as the protection scope of the present disclosure.

Claims

1. A self-starting synchronous reluctance machine, characterized by: Comprising: A stator (1) comprises a plurality of stator teeth (11), and a stator slot (12) is formed between two adjacent stator teeth (11), the stator slot (12) has a stator slot bottom diameter D Y , the stator slot bottom diameter D Y is the diameter of the slot bottom of the stator slot (12) along the radial direction of the stator; a stator outer circle diameter D O is the diameter of the outer circle of the stator (1), and the ratio between the stator slot bottom diameter D Y and the stator outer circle diameter D O satisfies: ; Diameter of inner circle of stator S Diameter of inner circle of stator S Diameter of outer circle of stator O The ratio between the diameter of outer circle of stator D ; Also included is a rotor (2) located radially inside the stator, the rotor (2) also including a rotor shaft hole (20) located radially inside thereof, the rotor shaft hole (20) having a diameter D SFT , and D SFT satisfying the relationship O ;​ Stator tooth width W T W is the circumferential width of the stator tooth (11), the stator (1) further comprises a stator yoke portion (13), which is the core portion between the stator outer circle and the stator slot bottom, the radial width of the stator yoke portion (13) is (D O -D Y ) / 2; the ratio of the sum of the lower half stator tooth width per pole to the stator yoke portion width satisfies: Where N S is the number of stator slots, and p is the number of rotor pole pairs.

2. The self-starting synchronous reluctance machine according to claim 1, characterized in that: Stator slot width W S is the circumferential width of the stator slot (12), and has .

3. The self-starting synchronous reluctance machine according to claim 2, characterized in that: The stator slot width: is the circumferential width at the 1 / 2 length in the radial direction of the stator slot (12), that is, the circumferential width at the position of the circular arc with a radius of the stator slot width.

4. The self-starting synchronous reluctance machine according to claim 1, characterized in that: The rotor (2) is provided with air slots to form magnetic barrier layers (3), the rotor (2) comprises a rotor core, the rotor core comprises a D-axis and a Q-axis; part of the magnetic barrier layers (3) between two adjacent layers is a magnetic flux channel layer (4); the width of each magnetic flux channel layer (4) in the D-axis or parallel direction of the D-axis is Wd1, Wd2,..., Wdn, N B ≥n≥1, and wherein N B The number of rotor magnetic barrier layers under each pole.

5. The self-starting synchronous reluctance machine according to claim 4, characterized in that: The widths of the magnetic flux guide layers (4) on the Q-axis are Wq1, Wq2,..., Wqn, N in sequence B ≥n≥1, and the ratio of the sum of the lower 1 / 2 stator tooth widths per pole to the sum of the widths of the Q-axis magnetic flux guide paths .

6. The self-starting synchronous reluctance machine according to claim 4, characterized in that: The widths of the magnetic barrier layers on the D-axis are Bd1, Bd2,..., Bd n in sequence; the widths of the magnetic barrier layers on the Q-axis are Bq1, Bq2,..., Bq n in sequence; The rotor (2) is axially stacked by rotor lamination.

7. The self-starting synchronous reluctance machine according to any one of claims 4-6, characterized in that: The magnetic barrier layers (3) are divided into multiple layers along the Q-axis, and the magnetic barrier layers (3) close to the radial outer circle relative to the axis of the rotor are filled slots; the filled slots are filled with electrically conductive and magnetically non-conductive material, i.e. conductive bars (5).

8. The self-starting synchronous reluctance machine according to claim 7, characterized in that: The conductive bars (5) are cast aluminum structures, which are formed in the filled slots by casting.

9. The self-starting synchronous reluctance machine according to claim 7, characterized in that: End rings (6) composed of electrically conductive and magnetically non-conductive material are placed at the axial ends of the rotor (2), and all or part of the conductive bars (5) are short-circuited together through the end rings (6) to form a loop.

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