CN113193706A

CN113193706A - Principle and method of manufacturing technology of alternating current two-pole rotating motor

Info

Publication number: CN113193706A
Application number: CN202010606472.7A
Authority: CN
Inventors: 张湘明; 张乐
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-07-30

Abstract

The invention relates to a manufacturing technique and a method of an alternating current rotary two-pole motor. For example, one coil of the stator is placed in two slots of axial symmetry, and the end portion of the coil is located above the yoke in two halves. A single phase two pole machine then requires two coils to be excited and therefore has four slots and four teeth in total. A three-phase two-pole machine requires three coils to be excited and therefore has six slots and six teeth. Compared with the AC two-pole motor in the prior art, under the condition of the same inner diameter and length of the stator, the number of the slots and the teeth is reduced by most parts, and the action sectional area of the magnetic pole can be increased by about 90 percent. (2) The excitation of a pair of magnetic poles by only one coil ensures that the magnetic flux density of the magnetic poles is uniform and has maximum magnetic flux. (3) After the cross section of the magnetic pole is increased by 90%, and the cross section of the magnetic yoke is increased by 90%, the rated power of the motor can be increased by more than three times, and the rated power can be increased by one time by increasing the magnetic flux by 30%.

Description

Principle and method of manufacturing technology of alternating current two-pole rotating motor

Technical Field

(1) The invention relates to a principle and a method of a stator and rotor manufacturing technology of an alternating current two-pole rotating motor, which comprises an alternating current two-pole synchronous motor, an alternating current two-pole asynchronous motor, an alternating current two-pole commutator motor, a linear motor corresponding to the motors, and a principle and a method of a stator and rotor manufacturing technology applied to the linear motor.

Background

(1) The principle and method of the existing manufacturing technology of the alternating current two-pole rotating motor mainly refer to the principle and method of the matching technology of the stator, the rotor and the coil of the motor, or the method of the interaction of the electromagnet and the current-carrying conducting wire, which has been over 100 years old, but has not been greatly improved so far. The major development of rotating electrical machines manufactured in the world has been along the old roads in terms of power capacity and performance index, but the current progress has been small. Such as asynchronous motors, have been completed at the end of the 19 th century.

(2) The large-scale turbonator has high rotating speed, the rotor bears strong centrifugal force, the diameter of the turbonator is limited by strength, and the length of the turbonator is limited from the aspect of critical rotating speed, so that the rotor has a certain limit in manufacturing, and the maximum capacity of the turbonator which can be manufactured is limited. The maximum rotor used at present has a maximum diameter of about 1100mm at a rotation speed of 3600rpm, a maximum diameter of about 1200mm at 3000rpm, and a total length of over ten meters. See the current situation and development trend of the first section of motor manufacturing industry in 6 months of 2017, 6 months of the first section of motor manufacturing industry by the master compilation machinery industry publisher of the western ampere transportation university (second edition) west ampere university, first section of electrical engineering manual, second volume of equipment part 13, chapter 2 of synchronous motor, turbo generator 2.3 turbo generator cooling mode, size, weight and efficiency table 1, chapter 14 of asynchronous motor and alternating current commutator motor, first section of three-phase asynchronous motor summary description of chapter 15 of rotating motor general statement, special motor chapter 1 of rotating motor, turbo generator utilization factor of

chapter

2, 6, 1 alternating current motor, and maximum capacity of 1.6.3 alternating current commutator motor, japanese electrical society of 8 months of 1984, 1 edition. Chapter 13 linear motor

(3) As can be known from the handbook of Electrical technology, the maximum theoretical ultimate power capacity of a turbonator is 2400 MVA. At present, a method for greatly breaking through the power capacity of a rotating electrical machine is a breakthrough of a superconducting technology. Therefore, there is a need for improvement in the manufacturing theory and technical method of the rotating electric machine to break through the performance, power capacity and application field of the rotating electric machine rather than wait for the development of the superconducting technology.

(4) According to our research, there are indeed important faults in the theoretical application and manufacturing techniques of the existing rotating electrical machines, analyzed as follows; the basic theory of the rotating electric machine is that a pair of magnetic poles N, S, i.e., a pair of electromagnets, are formed by a set of coils around a magnetic core, as is known from an alternator model of physical electromagnetism. When a coil abcd mounted on a rotatable cylinder is driven by a prime mover, an electric potential induced in the coil abcd is output through a brush, a slip ring, and a wire. See fig. 1. Fig. 1 is a physical theoretical model of a conventional alternator. In the figure;

element 1 and element 2 are the poles N, S of the motor.

The element 3 is an armature and a coil abcd.

The

elements

4, 5 are slip rings,

the element 6 is a brush. The current is output through the terminals g and j.

The field coils of the magnetic poles are not shown in the drawing, and the magnetic poles are directly indicated by magnets. Basically, the electric energy of the generator requires the prime mover to drive the rotor to rotate, the stator generates electromagnetic action and generates potential current output, and the rotation of the motor is provided with the potential current by the power supply, and the electromagnetic action is generated in the winding coils of the stator and the rotor to drive the rotor to rotate and output mechanical energy. The performance of the machine is therefore determined entirely by the design and manufacture of the poles and windings. In the current technical category, increasing the magnetic flux of the magnetic pole and increasing the effective cross-sectional area of the magnetic pole are two possible methods.

(5) We show a pole of the generator model of figure 1 as an electromagnet alone as in figure 2;

the element 1 is an electromagnet core of a magnetic pole.

The element X1 is a field coil. The current enters and exits from the ends g and j.

The action sectional area of the electromagnet is S₁There are; s₁＝α₁×β₁，

In the formula (I); alpha is alpha₁Is the length of the action section of the electric dental ironDegree (cm), beta₁Is the width (cm), beta, of the cross-section of action₁And also the length of the stator of the motor. S₁Is in units of cm²。

The attraction of the electromagnet is;

F₁＝(φ₁/5000)²/S₁＝(B₁/5000)²×S₁ (a)

in the formula F₁Is the suction force per square centimeter (kgf/cm) of the electromagnet²)；

B₁Is the magnetic flux density (Gs) when the magnetic field in the air gap of the electromagnet is uniformly distributed;

φ₁is the magnetic flux of an electromagnet having

φ₁＝B₁×S₁(Wb)。 (b)

Therefore, it is known that the attraction force of the electromagnet is proportional to the square of the magnetic flux density of the magnetic pole, and also increases as the effective cross-sectional area of the magnetic pole increases. And the magnetic flux is equal to the magnetic flux density of the magnetic pole multiplied by the effective cross-sectional area of the magnetic pole. See the first minute book of the electric engineering and electrician Manual, the first chapter of electrician basic knowledge of the Electrical administration of North China, the third section of common electrician calculation, the second section of the common electrician calculation, and the calculation of the attraction of the electromagnet. Hydro electric power press 2 months 1988. Page 19.

(6) As can be seen from fig. 1, the magnetic circuit of the alternator is formed by passing the magnetic poles of one side of the stator through the air gap 1, the rotor teeth, the rotor yoke, the rotor teeth, the air gap 2, to the magnetic poles of the other side of the stator, and then passing the magnetic poles of the stator through the stator yoke (not shown), and then to the magnetic poles, thereby completing the circuit. The flux density is uniform across each cross section of the circuit and the magnetic path in the generator pole is unique.

(7) The stator and rotor of the existing ac rotating electrical machine usually have a large number of slots and teeth, and then a magnetic pole of the electrical machine is composed of a plurality of slots and teeth and coils wound in the slots. Such as a plurality of coil windings wound in slots of a stator of an electric motor, respectively surrounding a plurality of teeth to form a plurality of small, partially independent poles or electromagnets. Rather than one complete pole as shown in figure 1. Alternatively, a pair of magnetic poles excited by a pair of electromagnetic coils is broken into small electromagnets each formed by a plurality of small electromagnetic coils and excited by a plurality of teeth.

(8) Referring to fig. 1, we show a product actual model of a conventional ac rotary generator as shown in fig. 3. In the figure the

elements

1, 2, 3 constitute one pole of the machine and the

elements

4, 5, 6 constitute the other pole of the machine. The field coils are not shown in the figure. In practice, the

elements

1, 2, 3, 4, 5, 6 are all part of the stator. A magnetic pole is divided into three elements because each element has a different magnetic field strength, flux density, magnetic flux, or spatial location. Both figures show a two-pole machine as in figure 1. In the figure, the element 7 is an armature and a coil abcd, the elements 8 and 9 are brushes, the elements 10 and 11 are slip rings, and current flows in and out from the terminals g and j. From the comparison between fig. 1 and fig. 3, the difference between the physical theoretical model of the generator and the actual product in the stator manufacturing can be visually seen. One side magnetic pole of the stator in fig. 3 is generally composed of 3 small electromagnets formed by exciting three stator teeth with two coils, that is, the magnetic pole has three branch magnetic circuits.

(9) We unfold one pole of the rotating machine of fig. 3 as shown in fig. 4, the pole being excited with a concentric winding coil. In the figure,

elements

1, 2 and 3 are three small electromagnets forming magnetic poles, elements X1 and X2 are excitation coils, and X is₁And X₂Are connected in series. The current flows in from the terminal g and flows out from the terminal j. The size of the cross-sectional area of the electromagnet is as shown in the figure, wherein; the width of the small electromagnet 1 is beta₂₁Length of alpha₂₁Area is S₂₁，S₂₁＝β₂₁×α₂₁。

Magnetic flux density is B₂₁The magnetic flux is phi₂₁，φ₂₁＝B₂₁×S₂₁。

The width of the small electromagnet 2 is beta₂₁Length of alpha₂₃Area is S₂₃，S₂₃＝β₂₁×α₂₃。

Magnetic flux density is B₂₂The magnetic flux is phi₂₂，φ₂₂＝B₂₂×S₂₃。

The width of the small electromagnet 3 is beta₂₁Length of alpha₂₅Area is S₂₅，S₂₅＝β₂₁×α₂₅。

Magnetic flux density is B₂₃The magnetic flux is phi₂₃，φ₂₃＝B₂₃×S₂₅。

The width of the groove upsilon 1 is beta₂₁Length of alpha₂₂Area is S₂₂，S₂₂=β₂₁×α₂₂。

The width of the groove upsilon 2 is beta₂₁Length of alpha₂₄Area is S₂₄，S₂₄＝β₂₁×α₂₄。

In general, there are; alpha is alpha₂₁＝α₂₂＝α₂₃＝α₂₄＝α₂₅＝α₂/5。

In the formula of alpha₂Is the width of the pole in fig. 3. And, in fact, β₂₁Is the length of the motor stator.

Irrespective of the area of the slot occupied by coil X2, the total pole-active cross-sectional area is the sum S of the areas of the three small electromagnets₂There are; s₂＝β₂₁×α₂₁+β₂₁×α₂₃+β₂₁×α₂₅＝3β₂₁×α₂₁。 (c)

The space occupied by the magnetic poles of the motor in figure 1 is the same as that occupied by the magnetic poles of the motor in figure 3, namely the inner diameter and the length of the stator of the motor are the same, namely beta₁＝β₂₁，α₁＝α₂Then there is;

S₂＝3S₁/5。 (d)

that is, the cross-sectional area of the motor pole shown in fig. 3 is less than three-fifths of the cross-sectional area of the motor pole shown in fig. 1 when the teeth and slots are distributed in the same arc length on the circumference of the inner diameter of the stator as compared with the cross-sectional area of the motor pole shown in fig. 1.

(10) As can be seen from fig. 4, small electromagnet 2 is excited by coils X1 and X2 in common, and

small electromagnets

1 and 3 are excited by coil 1 alone, so small electromagnet 2 has a higher magnetic field strength, magnetic flux density, and magnetic flux than

small electromagnets

1 and 3. Due to the magnetic saturation phenomenon, the flux density of the electromagnet in fig. 2 is the same as that of the small electromagnet 2 in fig. 4, but is greater than that of the

small electromagnets

1 and 3 in fig. 4. Comprises the following steps of;

B₁＝B₂₂＞B₂₁＝B₂₃。 (e)

in the formula B₁Is the magnetic flux density of the pole of fig. 2; b is₂₂Is the magnetic flux density, B, of the small electromagnet 2 in FIG. 4₂₁Is the magnetic flux density of the small electromagnet 1, B₂₃Is the magnetic flux density of the small electromagnet 3. The average value of the magnetic flux density of the 3 small electromagnets is B_{2 average}If so, then there is;

B_{2 average}＝(B₂₁+B₂₂+B₂₃)/3＜B₂₂＝B₁。 (f)

It is previously known that the magnetic flux of the electromagnet shown in fig. 2 is; phi is a₁＝B₁S₁。

The electromagnet shown in fig. 3, the magnetic flux is;

φ₂＝φ₂₁+φ₂₂+φ₂₃＝B_{2 average}×S₂＝3B_{2 average}×S₁/5。 (g)

Therefore; having the formulae (d) and (e) and having₂＜3φ₁/5. That is, the magnetic flux of such a prior art motor of fig. 3 is less than 60% of the theoretical motor flux shown in fig. 1. If the electromagnet is used for comparison, the formula of the attraction force of the electromagnet is available;

F₂＝(φ₂/5000)²/S₂＜3F₁/5。 (h)

in the formula (I); f₂Is the total suction force of the three small electromagnets shown in fig. 3;

S₂is the total cross-sectional area of the three small electromagnets shown in fig. 3;

F₁is the suction of the electromagnet shown in figure 1Force;

S₁the cross-sectional area of action of the electromagnet shown in figure 1.

(11) In the conventional ac rotary motor, it is a basic case that each tooth is substantially equal to the arc length at each slot opening on the circumference of the inner diameter of the stator. Setting the arc length of a stator tooth as h₀The number of teeth being n₀Stator bore diameter of D₀Length of circumference L₀＝πD₀There are;

h₀＝πD₀/2n₀， (i)

and the chord length of one tooth on the inner diameter circumference is h₁The central angle of a tooth is 360 DEG/2 n₀And then have;

h₁＝D₀sin(360°/4n₀)。 (j)

the effective cross-sectional area of a tooth is then S₀，S₀＝h₁β₂. Thus, in an AC two-pole motor, one pole occupies an arc length of at most π D₀/4. Then, when D₀When the cross section area of the magnetic pole is increased, the cross section area of the magnetic pole is also increased in proportion.

And the attractive force F of the magnetic pole₁Then follows S₀Is increased.

(12) From the power equation of the motor;

(μ)ζ＝KD²Ln，(ρ)ζ＝K/D²Ln，(σ)ζ＝K^//D^XL^Yn。 (k)

in the formula (I); x is more than 2.0 and less than 3.0; y is more than 1.0 and less than 1.5.

In the formula (I); ζ; power (KW) or capacity (KVA).

D. L; armature core diameter (m) and length (m).

n; rotational speed (rpm). K. K^/、K^//(ii) a A coefficient is utilized.

See the manual of electrical engineering, second volume of equipment, section 15, general statement on rotating electrical machines and the design basic 1.2 power equation of the first chapter of rotating electrical machines of special motors. As can be seen from the power equations (μ) and (ρ), the power capacity of the motor is proportional to the square of the rotor diameter when other conditions are unchanged. While the formula (σ) indicates that the power of the motor can also be approximated as being proportional to the 3 rd power of the rotor diameter.

(13) Therefore, when the length of the stator core is unchanged, the inner diameter is increased, the action sectional area of the stator is increased at the same time, or when the inner diameter is unchanged, the length of the stator is increased, the action sectional area is increased at the same time, and the sectional area of the coil conducting wire is increased correspondingly, namely when the action sectional area of the magnetic pole and the exciting current are increased at the same time, the power capacity of the motor is increased. For example, JY-7112 type single-phase capacitor starting asynchronous motor, number of stator/rotor slots; 24/18. The outer diameter of the stator is 120mm, the length of the iron core is 62mm, the inner diameter of the stator is 48mm, the conducting wire is a copper enameled wire with the diameter of 0.62mm, and the power capacity is 250W. When the outer diameter is unchanged, the length of an iron core is unchanged, the number of slots of a stator and a rotor is unchanged, the inner diameter is increased to 80mm, and the diameter of a lead is increased to 0.86mm, namely after the action sectional area of a magnetic pole is increased by 66.7%, the power capacity is increased to 550W and is increased by 120%, and the JY-7132 type single-phase capacitor starting asynchronous motor is formed. The handbook is used to look up the technical data of motor quickly, which is compiled by Sun Ke Jun, China Power Press, 2009, 6 th month, 383.

(14) For another example, the DO2-5612 type single-phase capacitor running asynchronous motor has the stator with the inner diameter of 48mm, the outer diameter of 96mm, the iron core length of 50mm and the number of stator/rotor slots; 24/18, the coil adopts double-layer concentric winding. The main winding is a copper enameled wire with the wire diameter of 0.28mm, the auxiliary winding is a copper enameled wire with the wire diameter of 0.31mm, and the rated power is 60W. When the inner diameter is increased to 58mm and the outer diameter is increased to 110mm, the length of the iron core is still 50mm and the number of stator/rotor slots is not changed; 24/18, the coil adopts double-layer concentric winding. The main winding is a copper enameled wire with the diameter of a lead wire being 0.50mm, the auxiliary winding is a copper enameled wire with the diameter of the lead wire being 0.45mm, namely when the sectional area of a magnetic pole is increased by 21%, the power capacity is increased to 250W, and is increased by 317%, and the DO2-7112 type single-phase capacitor running asynchronous motor is formed. Handbook for quick look-up of technical data commonly used in motors, page 415.

(15) For another example, the BO2-6312 single-phase resistance starting asynchronous motor has a stator with an outer diameter of 96mm, an inner diameter of 50mm, a stator length of 45mm and a number of stator/rotor slots; 24/18, the coil adopts double-layer concentric winding. The main winding is a copper enameled wire with the diameter of 0.45mm, the auxiliary winding is a through enameled wire with the diameter of 0.33mm, and the rated power is 90W. When the outer diameter of the stator of the motor is increased to 128mm, the inner diameter is increased to 67mm, the length of the stator is increased to 58mm, the number of slots of the stator and the rotor is unchanged, and the coils adopt a double-layer concentric winding mode. The main winding wire is a copper enameled wire with the diameter of 0.71, and the secondary winding wire is a copper enameled wire with the diameter of 0.45mm, and the rated power is 370W. Namely, after the action sectional area of the stator magnetic pole is increased by 73%, the rated power of the motor is increased by 311%, and the BO2-8012 single-phase resistance starting asynchronous motor is formed. Manual for quick look-up of technical data commonly used in motors, page 401.

(16) For another example, a JS2-355S1-2 type three-phase two-pole asynchronous motor has the stator with the inner diameter of 300mm, the outer diameter of 560mm, the length of an iron core of 160+1 multiplied by 10mm and the number of stator/rotor slots; 36/28. The stator wire gauge is a copper wire with the power rating of 112KW and the power rating of 2-1.4 multiplied by 5.6. When the inner diameter and the outer diameter of the stator are not changed, the length of the iron core is increased to 230+3 multiplied by 10mm, and the wire gauge of the stator is 2-2.0 multiplied by 5.6 of copper conducting wire, namely, the cross section area of the magnetic pole is increased by 44%. The power capacity is increased to 190KW, which is increased by 70%. The motor becomes a JS2-355M2-2 type three-phase two-pole asynchronous motor. When the length of the stator is increased to 260mm, the outer diameter is increased to 650mm, the inner diameter is increased to 350mm, the gauge of the stator wire is 2 copper wires with 2.8 multiplied by 6mm, and the number of stator/rotor slots is increased; 36/28, rated power is 280KW, it becomes JS2-400M1-2 type motor. Compared with the JS2-355S1-2 motor, the JS2-400M1-2 motor increases the action sectional area of the stator magnetic pole by 90 percent, and the power capacity increases by 150 percent. Handbook for quick look-up of technical data commonly used in motors, page 176.

(17) For another example, the J2-62-2 type three-phase two-pole asynchronous motor has a stator with an outer diameter of 280mm and an inner diameter of 155mm, the conducting wires are two copper enameled wires with a diameter of 1.60mm, the length of the iron core is 130mm, and the number of slots of the stator/rotor is equal; 36/22, the coil winding adopts a double-layer lap winding type winding mode, and the power capacity is 22 KW. The J2-71-2 type three-phase two-pole asynchronous motor has a stator with an outer diameter of 327mm and an inner diameter of 182mm, 4 copper enameled wires with a diameter of 1.30mm are used as leads, the length of an iron core is 130mm, and the number of stator/rotor slots is increased; 36/28, the coil winding adopts a double-layer lap winding type winding mode. The power capacity is 30 KW. Compared with the J2-62-2 motor, the J2-71-2 motor increases the action sectional area of the magnetic pole by 17.4 percent, and increases the power capacity by 36.4 percent. The J2-72-2 type motor has an outer diameter of 327mm and an inner diameter of 182mm, the lead wires are 4 copper enameled wires with the diameter of 1.50mm, the length of the iron core is 155mm, and the number of stator/rotor slots is increased; 36/28, the coil adopts a double-layer lap winding type winding mode and has rated power of 40 KW. Compared with the J2-72-1 motor, the cross section area of the magnetic pole action is increased by 19.2%, and the power capacity is increased by 33.3%. Handbook for quick look-up of technical data commonly used in motors, page 142.

(18) For another example, the Y-160M1-2 type three-phase asynchronous motor has a stator core with the length of 125mm, the outer diameter of 260mm, the inner diameter of 150mm and the number of stator/rotor slots; 30/26, the coil winding wire is two copper enameled wires with the diameter of 1.18mm and the diameter of 1.25mm, the coil winding adopts a single-layer concentric winding mode, and the power capacity is 11 KW. The Y-180M-2 type three-phase asynchronous motor has the stator with the outer diameter of 260mm, the inner diameter of 150mm and the number of stator/rotor slots; 36/28, the coil winding adopts double-layer lap winding type winding mode, the coil winding lead is two copper enameled wires with the diameter of 1.30mm and the diameter of 1.40mm, the length of the iron core is 175mm, and the power capacity is 22 KW. Compared with the Y-160M1-2 motor, the length of the iron core of the Y-180M-2 motor is increased by 50mm, namely the action sectional area of the stator magnetic pole is increased by 40%, and the power capacity is increased by 100%. In the Y-225M-2 type motor, the length of a stator core is 210mm, the outer diameter is 368mm, the inner diameter is 210mm, and the number of stator/rotor slots is increased; 36/28, the coil winding adopts double-layer lap winding type winding, the coil winding lead is 3 copper enameled wires with the diameter of 1.40 and 1 copper enameled wire with the diameter of 1.50mm, and the rated power capacity is 45 KW. Compared with the Y160M1-2 motor, the action sectional area of the Y-225M-2 motor magnetic pole is increased by 135.2%, and the rated power capacity is increased by 310%. In addition, the Y-280M-2 type motor has a stator core with the length of 260mm, the outer diameter of 445mm, the inner diameter of 255mm and the number of stator/rotor slots; 42/34, the coil winding adopts double-layer lap winding type winding mode, the coil winding is 8 copper wires with the diameter of 1.50mm, and the rated power is 90 KW. Compared with the Y-160M1-2 motor, the action sectional area of the Y-280M-2 motor magnetic pole is increased by 253.6 percent, the rated power is increased by 718 percent, and the action sectional area is more than 8 times that of the Y-160M1-2 motor. Handbook for quick look-up of technical data commonly used in motors, page 195.

(19) By summarizing the above statistics and using the power equation (k), it is possible to increase the power capacity of the motor by about 120% by increasing the pole action cross-sectional area by about 40% without changing the basic excitation method and the average magnetic flux density of the stator poles, that is, while still using the conventional stator coil winding manufacturing method. The power capacity of the motor can be increased by about 300% by increasing the magnetic pole action sectional area by about 90%.

(20) In the existing ac rotating electric machine, a large number of teeth, slots, and coils inevitably form a plurality of small electromagnets. The winding method of the stator coil is also the basic reason that one magnetic pole is divided into a plurality of small electromagnets. See fig. 5. The figure shows three basic winding methods of the stator coil, namely a single-layer concentric type, a single-layer chain type and a single-layer cross type. Refer to electromagnetic design of induction motor chapter tenth major edition motor design 10-3 stator winding and core design fig. 10-3 single layer winding expansion diagram 232 page 10-4 single double layer winding schematic diagram 233 page.

(21) The magnetic pole is not divided into a plurality of small electromagnet motor manufacturing technologies, the existing winding mode of one pole, one coil and two slots is adopted, but the method is only used for single-phase four-, six-, and eight.. n pole motors. See first 6 months of 2010, mechanical industry press, Panpin, et al, single phase motor repair. Page 40 of fig. 2-29 single phase 40 slot 20 pole capacitive ceiling fan double chain winding. Page 41 of fig. 2-30 single phase 40 slot 20 pole capacitive ceiling fan single chain winding. For another example, the motor for a small electric fan adopts an eight-slot eight-coil four-pole double-chain winding. Page 44 the fan of fig. 2-34 uses an 8-slot 4-pole double-strand winding. According to our experiments, the technology can increase the action sectional area of the stator magnetic pole, and after the proper coil is matched, the power capacity and the performance of the motor can be greatly improved. However, the existing dipolar motor has no theory or technology which can increase the cross section of the magnetic pole and the magnetic flux of the magnetic pole.

(22) For this purpose, we have used a concentric winding method using a wide range of stator coils, such as a three-phase asynchronous motor model JO2-22-2, which is a two-pole motor with a power capacity of 2.2KW, and the stator of this motor has 24 slots and 24 teeth, and when one of them is operated by current, a total of four coils form a complex electromagnetic coil in eight slots by current and two 2 p-2 poles at both ends of the coil.

(23) From the symmetry of the coil and magnetic pole and the conventional research method, we develop the electromagnetic states of the stator coil and magnetic pole when a certain phase of the JO2-22-2 type motor is energized into fig. 6. In the figure, elements X1, X2, X3 and X4 are exciting coils, and 4 coils are in a series working state. Designated by the

sequence numbers

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 are stator teeth. The teeth are separated from each other by stator slots. Current flows in from the terminal g and flows out from the terminal j. The 24 slots, 24 teeth and 4 coils represent the electromagnetic state of the poles when the motor is in operation. As can be seen from fig. 6, each pole is composed of three small electromagnets formed by dividing 24 stator teeth by two coils. The teeth numbered 2, 3, 4, 5, 6, 7, 8, 9, 10 in the figure are a small electromagnet 2 formed by the excitation surrounded by the coils X1 and X2. The teeth numbered 1 and 11 are the other two

small electromagnets

1 and 3 which are formed by being individually excited and surrounded by the coil X2. And the three small electromagnets jointly form one magnetic pole of the motor.

(24) The stator teeth numbered 14, 15, 16, 17, 18, 19, 20, 21, 22 in fig. 6 are a small electromagnet 5 formed by the excitation surrounded by the coils X3 and X4. The teeth numbered 13 and 23 are the other two

small electromagnets

4 and 6 which are separately excited by being surrounded by the coil X4. The three small electromagnets, together, form the other pole of the motor. Wherein

The magnetic field intensity of the small electromagnet 1 is H₃₁Magnetic flux density of B₃₁Magnetic flux of phi₃₁。

The magnetic field strength of the small electromagnet 2 is H₃₂The magnetic flux density is B₃₂The magnetic flux is phi₃₂。

The magnetic field strength of the small electromagnet 3 is H₃₃The magnetic flux density is B₃₃The magnetic flux is phi₃₃。

The magnetic field strength of the small electromagnet 4 is H₃₄The magnetic flux density is B₃₄The magnetic flux is phi₃₄。

The magnetic field strength of the small electromagnet 5 is H₃₅The magnetic flux density is B₃₅The magnetic flux is phi₃₅。

The magnetic field strength of the small electromagnet 6 is H₃₆The magnetic flux density is B₃₆The magnetic flux is phi₃₆。

Since the small electromagnet 2 is excited by the coils X1 and X2, the small electromagnet 5 is excited by the coils X3 and X4, the

small electromagnets

1 and 3 are excited by the coil X2 only, and the

small electromagnets

4 and 6 are excited by the coil X4 only, the small electromagnet 2 and the small electromagnet 5 have higher magnetic field strength, magnetic flux density and magnetic flux than the

small electromagnets

1 and 3 and the

small electromagnets

4 and 6, and only the electromagnetic parameters of the

small electromagnets

2 and 5 allow the magnetic saturation value to be close. Namely; phi is a₃₂＞φ₃₁＝φ₃₃(ii) a And phi₃₅＞φ₃₄＝φ₃₆。

(25) In a conventional ac rotating electric machine, a plurality of branched magnetic circuits are generally formed in a plurality of teeth of a pair of magnetic poles, which are formed by a plurality of coils surrounding a plurality of magnetic cores. The JO2-22-2 type motor is formed by teeth of two poles of a stator, rotor teeth, a magnetic yoke, an air gap and the like, and three branch magnetic circuits of the motor are formed, and the motor is shown in fig. 7. In the figure, element 1 is a stator and element 2 is a rotor. The dashed line epsilon 1 in the figure shows magnetic circuit L1, L1 passing through stator tooth 1, the air gap, the rotor tooth, the rotor yoke, the air gap, stator tooth 23, the stator yoke and back to tooth 1, completing the first circuit. Dashed line ε 2 shows magnetic circuit L2, L2 completing the second loop by passing through stator tooth 11, the air gap, the rotor tooth, the rotor yoke, the air gap, stator tooth 13, the stator yoke, and back to stator tooth 11. The dashed line e 3 runs through all the remaining teeth of the stator, e.g. from the 2, 3, 4, 5, 6, 7, 8, 9, 10 teeth of the stator, through the air gap, to the rotor teeth opposite these stator teeth, in two parts through the rotor yoke, the rotor teeth, then to the 14, 15, 16, 17, 18, 19, 20, 21, 22 teeth of the stator, and then these two parts through the stator yoke back to the 2, 3, 4, 5, 6, 7, 8, 9, 10 teeth of the stator, completing the third circuit. Only two magnetic circuits in the third loop e 2 are shown as a representative. It can therefore be seen that the poles of this motor have three branch magnetic circuits, each of which comprises a pair of small electromagnets. Comparing the magnetic circuit of the rotating electric machine model of fig. 3, it can be known that the JO2-22-2 type motor has similarity with its magnetic circuit.

(26) For another example, the DO2-7112 type single-phase capacitor running asynchronous motor is also a two-pole motor, and the winding adopts a double-layer concentric type. The stator therefore has 24 slots and teeth and 24 coils, each of which typically has a different number of turns. When an operating current is passed through one of the primary or secondary windings, a pair of magnetic poles of the motor is composed of 12 coils through which the current is passed and 24 slots and teeth in sequence. Again we unfold the stator of this motor as in figure 8. In the figure, elements X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11 and X12 are coils through which current flows, and the 12 coils are in a series working state. Designated by the

reference numerals

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 are the teeth of the stator. As can be seen, there is one coil winding for every two slots in the stator, there are 6 field coils for each pole, and each coil has n turns_i. The magnetic teeth are arranged sequentially in the figure and the position numbers of the coils are given.

(27) As can be seen from fig. 8, the pair of magnetic poles is characterized in that the coils X1, X2, X3, X4, X5 and X6 surround the 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11 teeth of the stator to form one magnetic pole of the motor. Because the coils are connected in series, the current passing through the coils is the same, but the number of teeth and the sequence of the windings of each coil are different, and the small electromagnets are formed differently. For example, coil X1 surrounds

teeth

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, wherein only teeth 1 and 11 are surrounded by coil X1 alone, but teeth 1 and 11 are spaced from other teeth and coils, so that teeth 1 and 11 become independent small electromagnet 1 and small electromagnet 2. The coils X1 and X2 together surround the 2 nd, 3 rd, 4 th, 5 th, 6 th, 7 th, 8 th, 9 th, 10 th teeth, wherein the 2 th, 10 th teeth are only surrounded by the coils X1, X2 together, and the teeth 2 become small electromagnets 3 due to the spacing of the other coils and teeth. The teeth 10 are small electromagnets 4. Coils X1, X2,

X3 surround teeth

3, 4, 5, 6, 7, 8, 9, wherein

teeth

3, 9 are surrounded by coils X1, X2, X3, teeth 3 become small electromagnets 5 and teeth 9 become electromagnets 6 due to the spacing of the other coils and teeth. The coils X1, X2, X3 and X4 surround the 4 th, 5 th, 6 th, 7 th and 8 th teeth, wherein the 4 th and 8 th teeth are only surrounded by the coils X1, X2, X3 and X4 together, and due to the spacing of other coils and teeth, the teeth 4 become small electromagnets 7, and the teeth 8 become small electromagnets 8. The 5 th, 6 th and 7 th teeth are surrounded by the coils X1, X2, X3, X4 and X5, and due to the intervals of other coils and teeth, 5 teeth become small electromagnets 9, and the teeth 7 become small electromagnets 10. The coils X1, X2, X3, X4, X5, X6 surround the 6 th tooth, and the 6 th tooth forms the small electromagnet 11. Because of the different number of excitation coils or the different spatial positions, the various parameters of the individual small electromagnets are either different. The main parameters of each small electromagnet are as follows;

the magnetic field strength of the small electromagnet 11 is H₄₁₁The magnetic flux density is B₄₁₁The magnetic flux is phi₄₁₁。

The magnetic field strength of the small electromagnet 10 is H₄₁₀The magnetic flux density is B₄₁₀The magnetic flux is phi₄₁₀。

The magnetic field strength of the small electromagnet 9 is H₄₉The magnetic field density is B₄₉The magnetic flux is phi₄₉。

The magnetic field strength of the small electromagnet 8 is H₄₈The magnetic field density is B₄₈The magnetic flux is phi₄₈。

The magnetic field strength of the small electromagnet 7 is H₄₇The magnetic flux density is B₄₇The magnetic flux is phi₄₇。

The magnetic field strength of the small electromagnet 6 is H₄₆The magnetic flux density is B₄₆The magnetic flux is phi₄₆。

The magnetic field strength of the small electromagnet 5 is H₄₅The magnetic flux density is B₄₅The magnetic flux is phi₄₅。

The magnetic field strength of the small electromagnet 4 is H₄₄The magnetic flux density is B₄₄The magnetic flux is phi₄₄。

The magnetic field strength of the small electromagnet 3 is H₄₃The magnetic flux density is B₄₃The magnetic flux is phi₄₃。

The magnetic field strength of the small electromagnet 2 is H₄₂The magnetic flux density is B₄₂The magnetic flux is phi₄₂。

The magnetic field strength of the small electromagnet 1 is H₄₁The magnetic field density is B₄₁The magnetic flux is phi₄₁。

The magnetic flux of this pole is then the sum of the magnetic fluxes of all the small electromagnets that make up this pole₄There are;

φ₄＝φ₄₁₁+φ₄₁₀+φ₄₉+φ₄₈+φ₄₇+φ₄₆+φ₄₅+φ₄₄+φ₄₃+φ₄₂+φ₄₁ (l)

and; phi is a₄₁₁＞φ₄₁₀＝φ₄₉＞φ₄₈＝φ₄₇＞φ₄₆＝φ₄₅＞φ₄₄＝φ₄₃＞φ₄₂＝φ₄₁ (m)

(28) Likewise, coil X7 surrounds

teeth

13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, of which only teeth 13, 23 are surrounded by coil X7 alone, but due to the spacing of the other teeth, a small electromagnet 12 is formed in tooth 13 and a small electromagnet 13 is formed in tooth 23. The coils X7, X8 surround the 14 th, 15 th, 16 th, 17 th, 18 th, 19 th, 20 th, 21 th, 22 th teeth, wherein only the 14 th, 22 th teeth are individually surrounded by the coils X7, X8, and thus a small electromagnet 14 is formed in the 14 th tooth and a small electromagnet 15 is formed in the 22 th tooth. The coils X7, X8, X9 collectively surround the 15 th, 16 th, 17 th, 18 th, 19 th, 20 th, 21 th teeth, wherein only the 15 th, 21 th teeth are individually surrounded by the coils X7, X8, X9, so that the small electromagnet 16 is formed in the 15 th tooth and the small electromagnet 17 is formed in the 21 st tooth. The coils X7, X8, X9, X10 collectively surround the 16 th, 17 th, 18 th, 19 th, 20 th teeth, wherein only the 16 th, 20 th teeth are individually surrounded by the coils X7, X8, X9, X10, and thus the small electromagnet 18 is formed in the 16 th tooth and the small electromagnet 19 is formed in the 20 th tooth. The coils X7, X8, X9, X10 and X11 collectively surround the 17 th, 18 th and 19 th teeth, wherein only the 17 th and 19 th teeth are individually surrounded by the coils X7, X8, X9, X10 and X11, so that the small electromagnet 20 is formed in the 17 th tooth and the small electromagnet 21 is formed in the 20 th tooth. The coils X7, X8, X9, X10, X11 and X12 jointly surround the 18 th tooth to form a 22 th small electromagnet. The main parameters of each small electromagnet are as follows;

the magnetic field intensity of the small electromagnet 12 is H₄₁₂Magnetic flux density of B₄₁₂Magnetic flux of phi₄₁₂。

The magnetic field intensity of the small electromagnet 13 is H₄₁₃The magnetic flux density is B₄₁₃The magnetic flux is phi₄₁₃。

The magnetic field strength of the small electromagnet 14 is H₄₁₄The magnetic flux density is B₄₁₄The magnetic flux is phi₄₁₄。

The magnetic field strength of the small electromagnet 15 is H₄₁₅The magnetic flux density is B₄₁₅The magnetic flux is phi₄₁₅。

The magnetic field strength of the small electromagnet 16 is H₄₁₆The magnetic flux density is B₄₁₆The magnetic flux is phi₄₁₆。

The magnetic field strength of the small electromagnet 17 is H₄₁₇The magnetic flux density is B₄₁₇The magnetic flux is phi₄₁₇。

The magnetic field strength of the small electromagnet 18 is H₄₁₈The magnetic flux density is B₄₁₈The magnetic flux is phi₄₁₈。

The magnetic field strength of the small electromagnet 19 is H₄₁₉The magnetic flux density is B₄₁₉The magnetic flux is phi₄₁₉。

The magnetic field strength of the small electromagnet 20 is H₄₂₀The magnetic flux density is B₄₂₀The magnetic flux is phi₄₂₀。

The magnetic field strength of the small electromagnet 21 is H₄₂₁The magnetic flux density is B₄₂₁Magnetic flux ofIs phi₄₂₁。

The magnetic field strength of the small electromagnet 22 is H₄₂₂The magnetic flux density is B₄₂₂The magnetic flux is phi₄₂₂。

Then, the magnetic flux of the second side magnetic pole is the sum phi of all the small electromagnet magnetic fluxes constituting the second side magnetic pole₄ ^*There are;

φ₄ ^*＝φ₄₂₂+φ₄₂₁+φ₄₂₀+φ₄₁₉+φ₄₁₈+φ₄₁₇+φ₄₁₆+φ₄₁₅+φ₄₁₄+φ₄₁₃+φ₄₁₂ (n)

and phi₄₂₂＞φ₄₂₁＝φ₄₂₀＞φ₄₁₉＝φ₄₁₈＞φ₄₁₇＝φ₄₁₆＞φ₄₁₅＝φ₄₁₄＞φ₄₁₃＝φ₄₁₂ (o)

(29) As can be seen from the foregoing discussion, the small electromagnet 11 excited by all 6 coils and the small electromagnet 22 excited by all 6 coils have the highest magnetic field strength, magnetic flux density, and magnetic flux. And only the magnetic field strength, flux density and flux of the small electromagnet 11 and the small electromagnet 22 are allowed to approach the magnetic saturation state. The

small electromagnets

10 and 9, 21 and 20 excited by the 5 coils have the second highest magnetic field parameter, and the

small electromagnets

2 and 3 have the exact same magnetic field parameter. The magnetic field parameters are mainly magnetic field strength, magnetic flux density and magnetic flux.

(30) I.e. 6 coils of the motor, 1 coil and 1 concentric ring type magnetic pole winding which forms the magnetic pole, and each small electromagnet has different magnetic field intensity or magnetic flux density and magnetic flux or different spatial positions. Other parameters of the motor refer to a manual for quick checking of motor general technical data, chapter 7 of driving micromotor by electric power press of Sun Kejun, 415 page of table 7.27 DO2 series single-phase capacitor running asynchronous motor iron core and winding data, 417 page of table 7.28 DO2 series single-phase capacitor running asynchronous motor winding arrangement method.

(31) From the above analysis, it is known that the magnetic poles of the DO2-7112 type motor are formed by 11 pairs of small magnetic poles consisting of 22 small electromagnets with different magnetic flux densities. It can be determined that there are 11 branch magnetic circuits for a pair of magnetic poles of this motor. Referring to fig. 9, fig. 9 shows a magnetic circuit of a single phase two pole motor with 24 slots of stator and 18 slots of rotor. In the figure, element 1 is a stator and element 2 is a rotor. Dashed line ε 1 shows that magnetic circuit L1, L1 completed the first loop by passing through stator tooth 1, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 23, the stator yoke, and back to stator tooth 1. Dashed line ε 2 shows that magnetic circuit L2, L2 completed the second loop by passing through stator tooth 2, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 22, the stator yoke, and back to stator tooth 2. Dashed e 3 shows that magnetic circuit L3, L3 passes through stator tooth 3, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 21, the stator yoke, back to stator tooth 3, completing the third loop. Dashed line ε 4 shows that magnetic circuit L4, L4 completed the fourth loop by stator tooth 4, the air gap, the rotor yoke, the air gap, stator tooth 20, the stator yoke, and back to stator tooth 4. Dashed line ε 5 shows that magnetic circuit L5, L5 completed the fifth loop by stator tooth 5, the air gap, the rotor tooth, the rotor yoke, the air gap, stator tooth 19, the stator yoke, back to stator tooth 5. Dashed line ε 6 shows that magnetic circuit L6, L6 completed the sixth loop by passing through stator tooth 6, the air gap, the rotor tooth, the rotor yoke, the air gap, stator tooth 18, the stator yoke, and back to stator tooth 6. Dashed line ε 7 shows that magnetic circuit L7, L7 completed the seventh loop by passing through stator tooth 7, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 17, the stator yoke, and back to stator tooth 7. Dashed line ε 8 shows that magnetic circuit L8, L8 completed the eighth loop by passing through stator tooth 8, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 16, the stator yoke, and back to stator tooth 8. Dashed line ε 9 shows that magnetic circuit L9, L9 completed the ninth loop by passing through stator tooth 9, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 15, the stator yoke, and back to stator tooth 9. Dashed line ε 10 shows that the tenth magnetic circuit L10, L10 passes through stator tooth 10, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 14, the stator yoke, back to stator tooth 10. The tenth loop is completed. Dashed line ε 11 shows that eleventh magnetic circuit L11, L11 completed the eleventh loop by passing through stator tooth 11, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 13, the stator yoke, and back to stator tooth 11. Dashed line 12 shows that the twelfth loop L12, L12 completes the twelfth loop by passing through stator tooth 6, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 18, the stator tooth yoke, and back to stator tooth 6. L6 is virtually the same magnetic circuit as L12 in stator teeth 6 and teeth 18, i.e. L6 and L12 are of the same magnetic circuit in small electromagnets 11 and 22. Due to the symmetry, the yoke is divided into two parts. The motor has eleven branched magnetic circuits in the stator teeth. As explained above, the eleven magnetic circuits differ in magnetic field strength, magnetic flux density, magnetic flux, position in the stator of the motor, or both.

(32) As is apparent from the above, a conventional rotating electric machine is basically configured to manufacture a stator or a rotor of an electric motor by a method of dividing one magnetic pole into a plurality of small magnetic poles. Therefore, the same physical phenomenon that a plurality of small electromagnets are combined into a large electromagnet is also existed as the JO2-52-2 type three-phase alternating current asynchronous motor and the DO2-6322 type single-phase capacitor running asynchronous motor.

(33) The production of rotating electric machines with better manufacturing performance, higher economic and technical indexes and higher power capacity is a fundamental desire of all motor industries and the motor industry, and the invention finds a direction for completing the desire. The motor completed by the invention can meet some requirements of all aspects in a longer time.

(34) As can be seen from the above statistics and power equation (k), in general, the power of the motor increases as the square of the stator inner diameter increases and as the length of the core increases. Therefore, it was determined that increasing the power of the rotating electrical machine required increasing the cross-sectional area of the stator and rotor poles and the field current of the winding wires. Under the condition of the prior art, the performance and economic and technical indexes of the motor are improved, the only effective method is that the coil adopts a centralized winding, the number of the stator and the rotor is reduced, most of slots are converted into magnetic poles, the action sectional area of the magnetic poles is increased, and meanwhile, the magnetic field intensity, the magnetic flux density and the magnetic flux of the magnetic poles can be effectively increased through the centralized winding. Based on the above analysis of ac rotary diode motors, we believe that the motors of the prior art designs have some failures that have resulted in phenomena and consequences;

(35) first, the magnetic flux density and flux of the magnetic poles are not high. The magnetic poles of the motor composed of a plurality of dispersed small electromagnets are limited by the excitation condition, and the magnetic field parameters of some of the small electromagnets are generally not high. The average magnetic flux density and the magnetic flux of the entire magnetic pole are not high. Such as DO2-7112, in which the highest flux density is small electromagnet 11 and small electromagnet 22. See fig. 8. The small electromagnet 11 and the small electromagnet 22 have the highest magnetic flux density which can be achieved by the common excitation of all the coils, and the exciting coils or exciting currents of other small electromagnets are reduced sequentially, so that the magnetic flux density of the small electromagnet is naturally reduced sequentially from the center to the outside, and the equations (m) and (o) completely express the condition that the magnetic flux is generated by the magnetic pole of the conventional DO2-7112 type single-phase motor under the condition of the sine wave winding excitation. The average flux density of a pair of poles of the motor is therefore much less than the saturation value of the material.

(36) And secondly, the sectional area of the magnetic pole is small. The number of stator and rotor slots of the machine is excessive and the space occupied reduces the cross-sectional area of action of the poles, as can be seen from a comparison of the poles of fig. 1 with that of fig. 3, the space of fig. 3 has two more slots at the same spatial position occupied by the poles, thus reducing the cross-sectional area of action of the poles by about 40% compared with that of fig. 1. The teeth and slots of the stator poles of the existing motor have arc lengths on the inner diameter circumference which are about half of each other. Therefore, the cross-sectional area of the pole also occupies about half of the circumferential area of the stator inner diameter.

(37) And the number of the coils is large, the number of the coil windings is large, the workload of manufacturing the motor is increased, and the use amount of electromagnetic wires and insulating materials is increased. It also increases the electromagnetic interference between the individual coils and the small magnets and poles, which may also be a major cause of higher harmonics in the motor.

(38) Fourthly, the design and manufacture are complex. The diversity of the motor windings not only makes the manufacturing technology complex, but also makes the manufacturing theory confused. Such as double layer or single double layer coil windings, some of the windings do different and mutually offset work, thus occupying the limited space of the slot and increasing the useless energy loss.

(39) The optimal matching of the shape of the cross section of the motor pole and the excitation coil is that the length of the end of the coil is equal to the length of the coil in the slot, i.e. the coil and the pole are square, or the coil is used with a proper span to make the length-width ratio of the pole as close to 1 as possible. Under this condition, a certain pole cross-sectional area enables minimum wire length excitation. The existing alternating current rotating motor is usually short in end part and long in groove inner part, particularly a large-scale steam turbine generator, the length of a lead at the end part is only dozens of centimeters, the length of the end part of some short-distance windings is even only several centimeters, and the length of the lead in the groove can exceed ten meters. Such an excitation coil is extremely inefficient. For example, an electromagnet having a length and width of 1 meter, the cross-sectional area of the magnet would be 1 square meter and the length of one turn of coil wire would be slightly more than 4 meters. The width of the other electromagnet is 0.1 meter, in order to make the cross section area of action 1 square meter, the length of the magnet must be 10 meters, the length of one turn of coil wire must be slightly more than 20.2 meters, the latter is 5 times of the former, and the loss resistance is 5 times. For example, DO2-7112 type single-phase motor, in which the minimum electromagnets 11 and 22 having the highest magnetic flux density have a length of 50mm and a width of 3.8mm, the theoretical length of one coil is (50+3.8) × 2 ═ 107.6mm, and the effective cross-sectional area of the minimum electromagnet is 50 × 3.8 ═ 190mm²For an electromagnet of the same square area, the theoretical length of a coil of one turn is 190^1/2And 4 is 55.14 mm. That is, it makes no sense to have nearly half the coil resistance for the field coils X1 and X7 of the two small electromagnets. See fig. 8.

(40) Sixthly, the coil parts positioned in the stator and rotor grooves are not cooled by convection gas basically. The existing motor has too many grooves and wires in the grooves which are not easy to cool, and particularly a large generator which is too slender. Even with the use of segmented cores, the effect is extremely limited. The more the number of slots of the stator and the rotor is, the more difficult the cooling of the conducting wires is, especially for large and ultra-large motors, the more the number of slots is, and the higher the cooling requirement for the coils is.

(41) These faults of the ac rotating machine affect the performance and development of the ac rotating machine, and inevitably limit the range of applications, for example, the power of a single-phase two-pole motor product is very small, and the performance is poor. As another example, the lack of a more powerful ac diode motor product has affected the use of large equipment in many ways. As another example, the diameter and length of high power alternator rotors have approached limits, and therefore the power capacity of existing generators has been substantially maximized. Therefore, to develop in various aspects of ac rotary diode machines, advances in theory and manufacturing techniques are necessary. For this reason, we conducted some basic studies.

(42) According to the theoretical model of the alternator in fig. 1, the induced electromotive force of the alternator is E;

there is E ═ ω abrin ω t. (p)

In the formula (I); ω ═ θ t. ω is the mean angular velocity of the coil abcd, a is the area of the coil abcd, and B is the magnetic flux density of the magnetic pole. That is, the waveform of the electromotive force generated by the generator is a sine wave function of time, which is determined by the interaction of the coil and the magnetic pole, regardless of the arrangement distribution of the stator teeth and the coil. The potential waveform of the motor magnetic pole and the coil is only passively applied with the potential given by the power supply, and is not related to the arrangement distribution of the stator teeth and the coil. Thus, it is one of the important faults to arrange deliberately the electromagnetic interaction of the coils and the teeth of the rotating electric machine to be distributed in a sinusoidal shape. The consequence of this error is that the magnetic flux of the motor poles is reduced, affecting the performance and development of the motor. Because the number of teeth, the number of slots and the number of coils of the large two-pole motor are large, the span of the coils is large, and the winding mode is more complex, the fault has larger influence on the magnetic flux density of the magnetic pole of the large motor.

(43) When the motor coil adopts a sine wave winding, the magnetic flux density of the magnetic pole at each moment is also distributed according to the shape of a sine wave. See the principle, calculation and test of single-phase asynchronous motors, guo wuchang, north river science and technology press, 12 months 1984, winding 2-4 sine winding of single-phase asynchronous motor in chapter ii.

For a 24-slot ac two-pole motor, such as a DO2-7112 single-phase capacitor-run asynchronous motor, a stator coil wound in a double-layer concentric manner is adopted, the stator has 24 teeth and 24 slots, the motor stator and the coil are schematically shown in fig. 8, wherein one magnetic pole is generally provided with 11 small electromagnets, and the average magnetic flux density of the ith small electromagnet provided with the magnetic pole is B_4iCross-sectional area is S_4iI is more than or equal to 1 and less than or equal to 11; is provided with

B_4i＝B_μ×sinθ_i；0＜θ_i＜180° (q)

One magnetic pole is divided into 12 parts, and one part is 15 degrees, so that the average magnetic flux density of 11 small electromagnets is equal;

B₄₁＝B_μ×sin15°＝B_μ×0.2588

B₄₂B_μ×sin30°＝B_μ×0.5

B₄₃B_μ×sin45°＝B_μ×0.7071

B₄₄B_μ×sin60°＝B_μ×0.866

B₄₅B_μ×sin75°＝B_μ×0.9659

B₄₆B_μ×sin90°＝B_μ

B₄₇B_μ×sin105°＝B_μ×0.9659

B₄₈＝B_μ×sin120°＝B×0.866

B₄₉＝B_μ×sin135°＝B_μ×0.7071

B₄₁₀＝B_μ×sin150°＝B_μ×0.5

B₄₁₁＝B_μ×sin165°＝B_μ×0.2588

B₄₁₂＝B_μ×sin180°＝0

in the formula B_μIs the maximum value of the magnetic flux density of the magnetic pole, generally B_μNear magnetic saturation values are used. And the magnetic flux of the magnetic pole is phi_εThere are;

φ_ε＝B₄₁×S₄₁+B₄₂×S₄₂+B₄₃×S₄₃+B₄₄×S₄₄+B₄₅×S₄₅+B₄₆×S₄₆+B₄₇×S₄₇+B₄₈×S₄₈+B₄₉×S₄₉+B₄₁₀×S₄₁₀+B₄₁₁×S₄₁₁。 (r)

from S₄₁＝S₄₂＝S₄₃＝S₄₄＝S₄₅＝S₄₆＝S₄₇＝S₄₈＝S₄₉＝S₄₁₀＝S₄₁₁；

Therefore, phi_ε＝(0.2588×2+0.5×2+0.7071×2+0.866×2+0.9659×2+1)×S₁×B_μ＝7.5956×S₁×B_μ (s)

If the magnetic flux density of each small electromagnet of the magnetic pole is B_μThat is, the shape of the magnetic flux density distribution of the small electromagnet in the magnetic pole is a rectangle. Let the magnetic flux density of the i-th small electromagnet be B_4i ^*Then, there is;

B₄₁ ^*＝B₄₂ ^*＝B₄₃ ^*＝B₄₄ ^*＝B₄₅ ^*＝B₄₆ ^*＝B₄₇ ^*＝B₄₈ ^*＝B₄₉ ^*＝B₄₁₀ ^*＝B₄₁₁ ^*＝Bμ；

whereby the magnetic flux of this pole is phi_ζThere are;

φ_ζ＝11×S₁×B_μ， (t)

then, the magnetic flux of the sine wave distributed magnetic pole is much smaller than that of the rectangular distributed magnetic pole, namely;

φ_ε/φ_ζ＝7.5956/11＝0.6905。 (u)

that is, under the condition that the cross-sectional areas of the magnetic poles are the same, the maximum magnetic flux of the stator magnetic pole of the DO2-7112 type motor adopting the sine wave winding can only reach 0.6905 of the maximum magnetic flux with rectangular distribution of the magnetic flux density of the magnetic pole.

Disclosure of Invention

(1) The technical defects of the existing alternating current rotating diode limit the performance and development of the motor, therefore, a technical method for manufacturing the alternating current rotating diode motor is provided, namely the technical method for manufacturing the rotating motor is provided, wherein each phase of the motor only has two magnetic poles, one phase of the motor only has one excitation coil, and one phase of the motor only has two grooves. The novel motor stator magnetic pole only has one magnetic circuit, and the magnetic circuit is divided into two paths in the magnetic yoke after coming out of the magnetic pole.

(2) The two-pole single-phase motor manufactured according to our inventive technique has a stator with a magnet plan shape as shown in fig. 10. In the figure, element 1 is a stator, and elements X1 and X2 are coils. h is₁₁Is the width of the yoke, h₁₂Is the width of the teeth. D₁₁Is the inner diameter of the stator. Since the coils of one pole of the concentrated coil winding are completely located in two slots of the stator which are symmetrical and opposite to the axis, such as the coil X1 in the

slots

1 and 3 in FIG. 10, and then are divided into two parts which are located at the end part between the inner diameter and the outer diameter of the stator. The winding X2 of the other phase is located in two and four slots. Intuitively, the stator teeth and slots are reduced from the typical 24 to 4. The concentrated coil winding occupies a large space and needs a large volume in the slot, so that a square stator is adopted, the maximum space of the slot and the magnetic yoke with enough width can be best ensured, and the motor has the volume and weight as small as possible, because the action sectional area of the magnetic pole of the motor can be increased by more than 90 percent compared with the action sectional area of the magnetic pole of the motor with the original same inner diameter, and the magnetic flux density and the magnetic flux of a magnetic circuit of the motor are also greatly increased. E.g. stator bore diameter D₁₁A circumference of π D₁₁The arc length of one tooth on the inner diameter of the stator ish₁₃The arc length of a groove at the upper opening of the inner diameter circumference is h₁₄. The chord length of one tooth of the single-phase two-pole motor is h₁₂Again the width of one tooth and two teeth for one pole. Width h of the yoke₁₁Width h of tooth₁₂The same is true. The arc length of one groove at the upper opening of the circumference is h₁₅. Thus, there are;

4×h₁₃+4×h₁₄＝πD₁₁。 (v)

considering that the opening of the slots satisfies the condition of coil insertion, it is assumed that all the stator teeth occupy an arc length of 9/10 on the inner diameter circumference and all the slots occupy an arc length of 1/10, i.e., the opening of the inner diameter circumference

h₁₃＝0.9πD₁₁/4， (w)

h₁₄＝0.1πD₁₁/4， (x)

Therefore, for the single-phase motor of the present invention, one stator tooth has a width h₁₂The stator has 4 teeth and 4 slots, and therefore;

h₁₂＝D₁₁×sin(0.9×360°/8)＝D₁₁×0.6494， (y)

the width of the stator slot is h₁₅There are;

h₁₅＝D₁₁×sin(0.1×360°/8)＝D₁₁×0.07846。 (z)

in order to ensure that the magnetic yoke has enough magnetic circuit sectional area, the width of the magnetic yoke of the single-phase two-pole motor is equal to the width h of one stator tooth₁₂。

(3) The reason why the rectangular stator punching sheet is adopted as much as possible is to reduce the volume weight and the manufacturing cost of the single-phase two-pole rotating motor. Because the alternating current rotary dipolar motor of the invention requires a larger width of the magnet yoke, otherwise, the stator adopts the circular punching sheet to improve the rated power and greatly improve the volume weight of the motor.

(4) Fig. 11 shows a stator and a coil of a single-phase two-pole rotating electric machine according to the present invention. In the figures,

elements

1, 2, 3, 4 are the teeth of the stator poles, and elements X1, X2 are the coils. Electric powerFlow direction g₁、g₂End into, from j₁、j₂And the end flows out. The technical method that two magnetic poles are only excited by one coil enables the magnetic flux density of the whole magnetic pole to be completely uniform and to reach an optimal value. The cross-sectional area of the magnetic poles can be made to approach or reach a desired maximum.

(5) The invention discloses a three-phase two-pole motor, which has three coils, 6 slots and 6 teeth in total according to a one-phase two-pole one-coil two-slot motor manufacturing technical method. The magnet plan view of the stator is shown in fig. 12, in which the element 1 is a stator and the elements X1, X2, and X3 are coils. In the figure D₂₂Is the inner diameter of the stator. The coil windings are respectively arranged in 6 slots which are symmetrical to the axis. The stator punching sheet adopts the regular hexagon to reduce the width of the stator magnet yoke and the volume weight cost, and the reason is the same as that of a single-phase two-pole motor. As can be seen from fig. 12, the pole cross-sectional area is increased more without a larger number of stator slots and coils. H in the figure₂₁Is the minimum width, h, of the stator yoke₂₂The width of one tooth of the stator is also the chord length of the arc length of the tooth on the circumference of the inner diameter. As can be seen, each coil is separated and excited for three stator teeth. h is₂₃Is the arc length of one tooth on the circumference of the inner diameter, h₂₄Is the arc length h of a groove at the upper opening of the inner diameter circumference₂₅Is the chord length of the groove at the upper opening of the inner diameter circumference. Thus, there are; 6 x h₂₃+6×h₂₄＝πD₂₂. Setting all stator teeth to occupy 9/10 inner diameter circumference arc length, and all stator slots to occupy 1/10 arc length at the upper opening of the inner diameter circumference;

h₂₃＝0.9×πD₂₂/6， (ε)

h₂₄＝0.1×πD₂₂/6。 (η)

for the three-phase two-pole motor of the invention, the chord length of the arc length of one stator tooth on the inner diameter circumference is

h₂₂＝D₂₂×sin(0.9×360°/12)＝D₂₂×0.4599， (λ)

The chord length of a groove at the upper opening of the inner diameter circumference is

h₂₄＝D₂₂×sin(0.1×360°/12)＝D₂₂×0.05234。 (ρ)

A, h₂₁Equal to one and one-half tooth width, i.e.

h₂₁＝3h₂₂/2。 (τ)

(6) Fig. 13 shows a three-phase two-pole rotating electric machine stator and coil development according to the present invention. In the figures,

elements

1, 2, 3, 4, 5, 6 are the teeth of the stator poles, and elements X1, X2, X3 are the coils of the stator. Current is given by g₁、g₂、g₃End flows in from j₁、j₂、 j₃And the end flows out.

(7) The basic electromagnetic law is; at a certain magnetic flux density, the size of the cross section area of the electromagnet and the current passing through the surrounding coil are in a certain proportional relation. That is, as the cross-sectional area of the motor magnetic pole increases, the excitation power also needs to be increased. At a certain supply voltage, the input current of the motor is proportional to the rated power of the motor. The motor manufactured according to our invention has the advantages that when the action sectional area of the stator magnetic pole is increased by 50%, the magnetic flux density of the stator magnetic pole is increased by 30%, and the sectional area of the wire of the coil is increased by 300%, the rated power of the motor is also increased by 300%. For example, a two-pole single-phase capacitor-run asynchronous motor was manufactured with a stator having an inner diameter of 67mm, a pole having an arc length of 68.41mm at the circumference of the inner diameter, and a slot having an arc length of 18.42mm at the upper opening of the circumference of the inner diameter. If the arc length occupied by a tooth and a groove on the circumference of the inner diameter of the stator of the motor in the prior art is the same, compared with the situation that the arc length occupied by the tooth and the groove on the circumference of the stator of the motor in the prior art is the same, the action sectional area of the magnetic pole of the motor is increased by 41.82 percent when the inner diameter and the length of the stator are unchanged. The stator is 160 x 160mm square in shape, see fig. 10. If the stator is circular, the diameter of the outer circle of the stator may be greater than 180 mm. Thus, there are; the inner diameter/outer diameter is not more than 67/180 ═ 0.3722, the ratio is less than the reference value of the prior technical standard 0.50-0.56, see the electromagnetic design of asynchronous motor of mechanical press of main edition of the city, university of western traffic, registered under the motor designDetermination of 11-2 major dimension and air gap fifth Page Table 11-3 three-phase asynchronous Motor D_i1/D₁Value first version of month 6 in 1982. Here, D_i1Is the inner diameter of the stator core, D₁Is the stator core outer diameter. The length of the stator is 32mm, the minimum magnet yoke width is 35mm, and the coil is a copper enameled wire. The main and auxiliary windings are the same, each is 780 turns, the wire diameter is 0.64mm, the coil 1 is embedded in the

slots

1 and 3, and then the two parts are separated and are respectively positioned at the end part of the stator. The coils 2 are embedded in the

slots

2, 4 and then separated at the ends of the stator. The rotor is a cage rotor of a single-phase capacitor running asynchronous motor with the power capacity of about 90W, and the rotor is provided with 18 grooves. When the motor is matched with a 15uf/400v capacitor, the input current is 2.5A and the input power is 550W when 220v is a single-phase power supply. With a 20uf/400v capacitor, a current of 3.5A was applied. Input power 770W.

(8) According to the analysis and comparison of the magnetic circuits, the difference of the three-phase two-pole motor in the prior art compared with the single-phase two-pole motor can be known; the magnetic circuit of the three-phase motor is relatively simple, and the difference of the magnetic flux density between every two teeth is small, so that the magnetic flux is high when the action sectional area of the same magnetic pole is the same, and the power capacity is also high. When the inner diameter and the length of the stator are the same, the sectional areas of the magnetic poles of the three-phase dipolar motor and the single-phase dipolar motor are basically the same, and after the technology of the invention is adopted, the sectional areas increased by the magnetic poles are not greatly different and can be increased to be close to 100 percent at most. Generally, the magnetic flux of a single-phase motor and a small three-phase two-pole motor is increased more, and the coil wire of a large three-phase two-pole motor is decreased more.

Technical characteristics

(1) Compared with the existing motor with the same rotor geometric condition, namely under the condition that the diameter and the length of the rotor are unchanged, the small single-phase capacitor running asynchronous motor increases the action sectional area of a stator magnetic pole by about 50 percent, increases the width of a magnetic yoke by 50 percent, increases the volume weight of the motor and increases the magnetic flux, and increases the power capacity of the motor by more than three times according to some experimental results and a power equation (k). Therefore, the invention can enlarge the rated power of the alternating current rotary dipolar motor and improve the performance of the motor.

(2) The single-phase capacitor running asynchronous motor can regulate the output power of the motor by using the capacitor in a relatively large range. As described above, the motor stator of the present invention, which has the same geometric size as the rotor of the conventional 90W motor, has an increased effective cross-sectional area by about 50%, an increased magnetic flux by 30%, and an increased yoke width by 50%, and then has an operating current of 3.0A when a 15uf capacitor is used. The output power is about 550W, and when a 20uf capacitor is used, the input current is 3.7A, and the input power exceeds 800W, and the input current and power can also be increased within a certain range as the capacitance is appropriately increased. The 3.7A current is slightly larger, so that the motor is not suitable for long-term operation, but the motor is very good to be used as a capacitor starting operation asynchronous motor, such as a motor matched with an air conditioner compressor.

(3) When the inner diameter and the length of the stator are the same, after the motor stator adopts the manufacturing method of one phase and one coil, the action sectional area of the magnetic pole of the stator can be increased by about 0 to 100 percent on the basis of the existing product, and the proper chamfer is required to be implemented on the opening of the stator slot on the circumference when the action sectional area of the magnetic pole is increased to 100 percent. Therefore, the torque of the motor can be increased simultaneously, and the power and the performance are improved. The magnetic flux density of the stator magnetic pole of the dipolar motor of the invention has a more ideal value.

(4) According to the statistics and power equation (k), when the magnetic flux density condition is not changed, the magnetic pole sectional area increased by 90% on the basis of the existing product can be increased by 300% of rated power. If the average magnetic flux density or the magnetic flux of the magnetic poles is increased, the rated power of the motor can be further increased. For example, the DO2-7112 motor, according to the previous calculations, the pole action cross-section increases by 90% when a pair of poles of the stator of the present invention is excited with only one coil. According to the formula (a) of the attraction force of the electromagnet, the attraction force of the electromagnet is increased by nearly 100%. Of course, the diameter and the length of the rotor are not changed, because the increase of the width of the magnetic yoke causes the outer diameter or the volume weight of the stator to be greatly increased.

(5) Compared with the existing AC two-pole motor with the same power, the motor of the invention can reduce the volume and weight of the wire by about 20 percent under the condition of unchanged current density of the wire passing through the coil winding. And because the lead is mostly located at the end part of the stator, the heat dissipation condition is good, obviously, the lead is beneficial to a large-scale two-pole generator adopting water cooling or hydrogen cooling, and has good effect on a motor adopting convection air cooling.

(6) The motor has good prospect. According to the similarity principle, the method can be popularized with a small amount of information; firstly, the power capacity of the alternating current rotary two-pole generator with the existing maximum power capacity is increased by three times or more. This is particularly important for ultra high power turbogenerators. For example, the maximum power capacity of the turbonator is increased from 1500MVA to 6000MVA or more, and obviously, the expected power capacity exceeds the limit parameter index shown by the prior theoretical technology too much. The new difficulty in implementing the technology is just the problems of the strength, the rigidity and the like of the rotating shaft. In addition, if the length of the rotor and the stator is reduced by half without reducing the action sectional area of the magnetic poles of the motor, the rated power of the motor is not reduced, or the length of the stator and the rotor is reduced by one third to increase the rated power by 1-2 times, the method is also a good choice. The technical schemes are important progress for the performance and economic and technical indexes of the motor, for example, the lengths of the stator and the rotor of the large-scale turbonator can be reduced from more than ten meters to about five meters, and a certain magnetic flux average density is increased without reducing the rated power of the motor. Second, the power capacity of a large ac two-pole motor is increased by three times or more, so that the application range of some large and important equipment can be increased. And thirdly, the use of the single-phase alternating current two-pole motor is expanded in a large range.

Drawings

(1) Fig. 1 is a schematic diagram of a prior art physical theory model of an alternator, in which an element 1 is a magnetic pole N and an element 2 is a magnetic pole S. The element 3 is an armature and coil winding abcd. The

elements

4, 5 are slip rings, the

elements

6, 7 are brushes, and current flows in and out from the terminals g, j.

(2) FIG. 2 is a schematic view of an alternator as shown in FIG. 1Schematic of the cross section of an electromagnet of a magnetic pole, in which element 1 is a core and element X2 is a coil. Cross-sectional area S of iron core₁＝α₁×β₁。

(3) Fig. 3 is a schematic model of an ac rotary diode motor according to the related art. In the figure the

elements

1, 2, 3 are three small electromagnets constituting one magnetic pole and the

elements

4, 5, 6 are small electromagnets constituting another magnetic pole. The element 7 is an armature and coil abcd, the elements 8 and 9 are brushes, and the elements 10 and 11 are slip rings. The current enters and exits from the ends g and j.

(4) Fig. 4 is an expanded view of one pole of the motor shown in fig. 3. In the figure the element 1 is a small electromagnet 1, the width of the small electromagnet 1 being beta₂₁Length of alpha₂₁Cross-sectional area S₂₁Has S₂₁＝β₂₁×α₂₁. The element 2 is a small electromagnet 2, the width of the small electromagnet 2 being beta₂₁Length of alpha₂₁Cross-sectional area S₂₂Has S₂₂＝β₂₁×α₂₂. The element 3 is a small electromagnet 3, the width of the small electromagnet 3 being beta₂₁Length of alpha₂₃Cross-sectional area S₂₃Has S₂₃＝β₂₁×α₂₃. The element 4 is a field coil X1 with coils in slots v 1 and v 2, the slot v 1 having a width beta₂₁Length of alpha_2４Cross-sectional area S₂₄Has S₂₄＝β₂₁×α₂₄. The width of the groove upsilon 2 is beta₂₁Length of alpha₂₅Cross-sectional area S₂₅Has S₂₅＝β₂₁×α₂₅. To a compound of formula (I); alpha is alpha₂₁＝α_2２＝α₂₃＝α₂₄＝α₂₅Has S₂₁＝S₂₂＝S₂₃＝S₂₄＝S₂₅. The element 5 is a field coil X2.

(5) Fig. 5 shows the winding manner of three coils of the stator of the conventional rotating electric machine, which includes a concentric type, a chain type and an interactive type. Part of the parameters are; number of slots 36, number of poles 4, number of phases 3. In the figure, a) is concentric, b) is chain, and c) is interactive.

(6) Fig. 6 is a development view of a stator and a coil of a conventional JO2-22-2 type three-phase two-pole motor when one phase is energized for operation. In the figures, the elements denoted by

reference numerals

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 are teeth of the stator, the elements X1, X2, X3, X4 are winding coils, and the coils are concentrically wound.

(7) Fig. 7 is a schematic diagram of the magnetic circuit of a model JO2-22-2 motor, which is also the magnetic circuit of some three-phase two-pole machines. The stator has 24 slots, and the number of rotor slots is 18. In the figure element 1 is the stator and element 2 is the rotor and the dashed line epsilon 1 indicates that magnetic circuit L1, L1 has passed through stator tooth 1, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 24, the stator yoke, back to stator tooth 1, completing the first circuit. Dashed line e 2 indicates magnetic circuit L2, L2 passes through

stator teeth

2, 3, 4, 5, 6, 7, 8, 9, 10, 11, air gap, rotor teeth, rotor yoke, rotor teeth, air gap,

stator teeth

14, 15, 16, 17, 18, 19, 20, 21, 22, 23, stator yoke, back to

stator teeth

2, 3, 4, 5, 6, 7, 8, 9, 10, 11, completing the second loop. Dashed line ε 3 indicates that magnetic circuit L3, L3 completed the third loop by passing through stator tooth 13, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 13, the stator yoke, and back to stator tooth 12.

(8) Fig. 8 is a development schematic diagram of a stator and a coil of a conventional DO2-7112 single-phase two-pole capacitor running asynchronous motor when one phase is electrified for operation. The one-phase current passing means that only one layer of the double-layer winding of the stator passes current. The teeth of the stator are marked with the

reference numbers

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 in the figures. The elements X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, and X12 are field coils, and the coils are double-layer concentric windings. Current flows in from the terminal g and flows out from the terminal j.

(9) Fig. 9 is a schematic magnetic circuit diagram of a DO2-7112 motor, which is also a schematic magnetic circuit diagram of some single-phase two-pole motors. In the figure element 1 is the stator and element 2 is the rotor and the dashed line e 1 shows that the magnetic circuit L1, L1 completes a circuit through stator tooth 1, air gap, rotor tooth, rotor yoke, rotor tooth, air gap, stator tooth 23, stator yoke, back to stator tooth 1. Dashed line ε 2 shows that magnetic circuit L2, L2 completes the second loop by passing through stator tooth 2, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 22, the stator yoke, and back to stator tooth 2. Dashed line ε 3 shows that magnetic circuit L3, L3 completes the third loop by passing through stator tooth 3, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 21, the stator yoke, and back to stator tooth 3. Dashed line ε 4 shows that magnetic circuit L4, L4 completes the fourth loop by passing through stator tooth 4, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 20, the stator yoke, and back to stator tooth 4. Dashed line ε 5 shows that magnetic circuit L5, L5 completed the fifth loop by stator tooth 5, the air gap, the rotor tooth rotor yoke, the air gap, stator tooth 19, the stator yoke, and back to stator tooth 5. Dashed line ε 6 shows that magnetic circuit L6, L6 completed the sixth loop by stator tooth 6, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 18, the stator yoke, back to stator tooth 6. Dashed line ε 7 shows that loop L7, L7 completes the seventh loop through stator tooth 11, air gap, rotor tooth, rotor yoke, air gap, stator tooth 13, stator yoke, back to stator tooth 11. Dashed line ε 8 shows that loop L8, L8 completed the eighth loop by stator tooth 10, air gap, rotor tooth, rotor yoke, rotor tooth, air gap, stator tooth 14, stator yoke, back to stator tooth 10. Dashed line ε 9 shows that loop L9, L9 completes the ninth loop by passing through stator tooth 9, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 15, the stator yoke, and back to stator tooth 9. Dashed line ε 10 shows that the circuit L10, L10 completes the tenth circuit through stator tooth 8, air gap, rotor tooth, rotor yoke, rotor tooth, air gap, stator tooth 16, back to stator tooth 8. Dashed line ε 11 shows that loop L11, L11 completes the eleventh loop by passing through stator tooth 7, the air gap, the rotor tooth, the rotor yoke, the air gap, stator tooth 17, the stator yoke, and back to stator tooth 7. Dashed line 12 shows that loop L12, L12 passes through stator tooth 6, the air gap, the rotor tooth, the rotor yoke, the rotor tooth, the air gap, stator tooth 18, the stator yoke, back to stator tooth 6, completing the twelfth loop. According to the winding mode of the coil and the symmetry of the magnetic circuit, it can be determined that the loop L12 and the loop L6 are actually the same magnetic circuit in the tooth, and are two parts separated in the yoke by one magnetic circuit in the tooth 6 and the tooth 18.

(10) Fig. 10 is a plan view of a single phase two pole ac rotating machine stator of the present invention, the stator having a total of 4 teeth and 4 slots. In the figure, the element 1 is a stator, D₁₀Is the diameter of the stator when the contour is circular, h₁₀The outline of the stator is the side length of a square. Each of the elements X1 and X2 is a stator phase coil. Labeled D in the figure₁₁Is the inner diameter of the stator, h₁₁Is the minimum width, h, of the yoke₁₂Is the width of one tooth.

(11) Fig. 11 is an expanded view of the single-phase two-pole rotating electric machine 4-slot stator and two coil windings according to the present invention. In the figures, the

numbers

1, 2, 3 and 4 denote teeth of the stator, and the elements X1 and X2 denote winding coils. Where X1 is the field coil of the primary winding and X2 is the field coil of the secondary winding. Current is respectively from g₁And g₂End inflow from j₁And j₂And the end flows out.

(12) Fig. 12 is a plan view showing a stator of a three-phase two-pole rotating electric machine of the present invention, the stator having 6 teeth and 6 slots in total. H in the figure₂₁Is the minimum width, h, of the yoke₂₂Is the width of one tooth of the stator, element 1 is the stator in the figure, elements X1, X2. X3 are coils of the stator windings of each phase. Labeled D in the figure₂₂Is the inner diameter of the stator, D₁₀The diameter of the stator is the diameter when the outline is round, and the diameter of the circumscribed circle of the hexagon when the outline of the stator is regular hexagon.

(13) Fig. 13 is an expanded view of a three-phase two-pole rotating electrical machine 6 tooth 6 slot stator and three coils, in which

reference numerals

1, 2, 3, 4, 5, and 6 denote teeth of the stator, and elements X1, X2, and X3 in the figure correspond to field coils of three-phase windings, respectively. Current is respectively from g₁、g₂、g₃End inflow from j₁、j₂、j₃And the end flows out.

Claims

1. An alternating current rotary dipolar motor, including alternating current dipolar synchronous motor, alternating current dipolar asynchronous machine, alternating current dipolar commutator machine, alternating current dipolar linear motor and manufacturing approach of the relevant application product, refer to the excitation mode that the method that the stator, rotor coil and magnetic pole of the electrical machinery interact specifically, its characteristic is; the stator and rotor of the motor adopt a concentrated mode to wind the excitation coil, namely a pair of magnetic poles are excited by one coil. Thereby enlarging the arc length occupied by the teeth, wherein the arc length occupied by the stator teeth can be more than 90% of the circumference of the inner diameter. As the cross-sectional area of the poles increases, the stator yoke must then widen to accommodate the greater magnetic flux. The cage rotor reduces the number of slots to match the interaction of the stator poles.

2. The invention is defined by claim (1); the N-phase motor adopts 2N stator teeth and 2N stator slots and N magnet exciting coils. For example, a three-phase motor adopts 6 teeth, 6 slots and 3 magnet exciting coils. The single-phase motor (except salient-pole shaded-pole motor) adopts 4 teeth, 4 slots and 2 magnet exciting coils.

3. According to the claim (1), the outer profile of the stator punching sheet of the three-phase motor is a regular hexagon, so that six slots can be optimally arranged and the motor has the minimum volume and weight cost. The center line of each groove overlaps the bisector of the six vertex angles.

4. According to the claim (1), the outer contour of the stator punching sheet of the single-phase motor is a regular quadrangle, so that four slots are optimally arranged and the motor has the minimum volume and weight cost. The center line of each groove overlaps the bisector of the four apex angles.

5. The invention, as recited in claim (1), comprises a stator of a single-phase motor; d₁₁/D₁₀≤0.45；D₁₀/h₁₀Less than or equal to 0.45. In the formula (I); d₁₁Is the inner diameter of the stator, D₁₀Is the diameter of the circle, h, when the outline of the stator is circular₁₀The side length of the square is the outline of the stator when the outline is square.

6. The invention according to claim 1 comprises a three-phase motor stator; d₂₂/D₁₁Less than or equal to 0.45. In the formula D₂₂Is the inner diameter of the stator, D₁₁The diameter of the circumscribed circle of the hexagon is the diameter of the circle when the outline of the stator is a regular hexagon, and the diameter of the circle is also the diameter of the circle when the outline of the stator is a circle.