WO2017132851A1

WO2017132851A1 - Motor having octupole stator and winding structure of stator

Info

Publication number: WO2017132851A1
Application number: PCT/CN2016/073255
Authority: WO
Inventors: 林高合; 王世宏
Original assignee: 林高合; 王世宏
Priority date: 2016-02-03
Filing date: 2016-02-03
Publication date: 2017-08-10

Abstract

Disclosed are a motor having an octupole stator and a winding structure of the stator. The winding structure of the stator comprises: a stator (1) comprising a first pole (11), a second pole (12), a third pole (13), a fourth pole (14), a fifth pole (15), a sixth pole (16), a seventh pole (17), and an eighth pole (18) arranged along a circumferential direction, wherein pole windings (111, 121, 131, 141, 151, 161, 171, 181) are wound respectively on the respective poles, a ratio of the number of coil turns of the pole windings of the first to eighth poles is 1:8:3:4:9:2:7:6, and a sum of the number of coil turns of the respective pole windings of the stator is 40n, and 40n ≥ 720. The motor of the present invention utilizes asymmetrical coil winding to generate an asymmetrical magnetic field between any two adjacent poles so as to reduce magnetic impedance at the armature poles of the stator, thereby decreasing power loss of the motor and increasing power generation efficiency. In addition, by utilizing a characteristic of the stator in which temperatures of respective poles vary, the heat dissipation effect of the motor can be improved, further increasing power generation efficiency thereof.

Description

Description: The motor with an eight-pole stator and the winding structure of the stator

[0001] The present invention relates to a winding structure of a motor and a stator thereof, and more particularly to a winding structure of a copper coil of a stator composed of eight magnetic poles, and the eight magnetic poles of the stator cooperate with an eight-pole rotor Operation produces electricity background technology

[0002] The stator is one of the necessary components of a motor (including a motor or generator). Among them, among the various motors, a style with eight magnetic poles (herein referred to as an eight-pole stator) is not a novel item because it is often disclosed in the related literature and is a commercially available product that is readily available on the market. .

Summary of invention

technical problem

[0003] However, the number of turns of the coils on the respective magnetic poles of the stator of the prior art is the same, so when the coils wound around the respective poles are supplied with current, each of the magnetic poles is induced by the magnetic field of the rotor. The generation of electric power of the same intensity, thus causing the magnetic poles (i.e., armatures) of the rotor to rotate between two adjacent magnetic poles of the stator, is susceptible to high magnetic impedance. The magnetic impedance is generally high and is one of the main causes of thermal energy loss and low efficiency of the motor.

On the other hand, due to the above heat loss, the temperature of each of the magnetic poles of the stator will increase after the operation of the existing motor for a period of time. Since the windings of the rotor and the stator are all odd-numbered turns, each pole has a uniform heat loss, resulting in the same temperature increase. Finally, the high temperatures of the poles of the stator often affect the efficiency of the rotor in a variety of ways. In the worse case, whether based on dissipation or convection, the temperature of the rotor will rise as the temperature of the stator increases. Finally, unless the heat is dissipated smoothly, it will cause many adverse effects of the motor, including operating life, energy efficiency and environmental effects.

[0005] It is known that when the overall temperature of the motor increases, the magnetic loss caused by the iron loss (including the magnetic hysteresis loss and the eddy current loss) and the resistance loss of the copper coil of the motor increase, resulting in an increase in the virtual work of the motor. The power loss boosting port, including the active and reactive components of the motor, causes a significant drop in power generation efficiency. Overall, the rotor must withstand high magnetic impedance during rotation, because Therefore, if the problem of heat dissipation cannot be solved, it is difficult to improve power generation efficiency and power conversion efficiency in any way.

Problem solution

Technical solution

SUMMARY OF THE INVENTION One object of the present invention is to provide a novel coil design structure that addresses the problem of thermal energy by utilizing a unequal number of copper coil windings of a generally octal stator. Among them, by appropriately distributing the number of turns of each magnetic pole, each pair of different magnetic poles will generate a magnetic field of a different size and a large decrease in magnetoresistance and energy loss.

Another object of the present invention is to provide a winding structure of an eight-pole stator and the motor having the eight-pole stator, which can be operated by making the magnetic pole windings on the magnetic poles have different number of coil turns. The temperature rise of each of the magnetic poles is different, and the heat energy received by the rotor and the stator body during the rotation process is easily conducted inside the motor to improve the heat dissipation effect and overall energy efficiency of the motor.

[0008] In order to achieve the foregoing object, the technical means utilized by the present invention include:

[0009] A winding structure of a stator includes a stator including a first magnetic pole, a second magnetic pole, a third magnetic pole, a fourth magnetic pole, a fifth magnetic pole, and a magnetic pole arranged in a circumferential direction a sixth magnetic pole, a seventh magnetic pole and an eighth magnetic pole, wherein each of the magnetic poles is respectively provided with a magnetic pole winding, and the first magnetic pole, the second magnetic pole, the third magnetic pole, the fourth magnetic pole, the fifth magnetic pole The coil turns ratio of the sixth magnetic pole, the seventh magnetic pole and the eighth magnetic pole of the magnetic pole winding is 1: 8: 3: 4: 9: 2: 7: 6. Wherein, the total number of turns of the coils of the stator 1 is 40n and 40n ^ 720.

[0010] The winding structure of the stator as described above, wherein the first magnetic pole is provided with a first magnetic pole winding, the second magnetic pole is provided with a second magnetic pole winding, and the third magnetic pole is provided with a third magnetic winding a magnetic pole winding, the fourth magnetic pole is provided with a fourth magnetic pole winding, the fifth magnetic pole is provided with a fifth magnetic pole winding, the sixth magnetic pole is provided with a sixth magnetic pole winding, and the seventh magnetic pole is provided for winding a seventh magnetic pole winding, the eighth magnetic pole is wound around an eighth magnetic pole winding, and the number of turns of the first magnetic pole winding is n, the number of turns of the second magnetic pole winding is 8n, and the coil of the third magnetic pole winding The number of turns is 3n, the number of turns of the fourth magnetic pole winding is 4n, the number of turns of the fifth magnetic pole winding is 9n, the number of turns of the sixth magnetic pole winding is 2n, and the number of turns of the seventh magnetic pole winding For 7n, the number of turns of the eighth pole winding is 6n.

[0011] The winding structure of the stator as described above, wherein each magnetic pole of the stator includes a single tooth portion, the first magnetic pole The tooth portion of the second magnetic pole is wound around the second magnetic pole winding, and the tooth portion of the third magnetic pole is wound around the third magnetic pole winding, the tooth of the fourth magnetic pole The fourth magnetic pole winding is disposed around the tooth portion of the fifth magnetic pole for winding the fifth magnetic pole winding, wherein the tooth portion of the sixth magnetic pole is wound around the sixth magnetic pole winding, and the tooth portion of the seventh magnetic pole is supplied The seventh magnetic pole winding is wound, and the tooth portion of the eighth magnetic pole is wound around an eighth magnetic pole winding.

[0012] The winding structure of the stator as described above, wherein the number of slots of each of the magnetic poles of the stator is several such that each of the magnetic poles includes a plurality of teeth.

[0013] The winding structure of the stator as described above, wherein each of the magnetic poles includes a first wire groove, a second wire groove, a third wire groove and a fourth wire groove, and each of the magnetic pole windings is sequentially wound around The first and third wire grooves and the coils in the second and fourth wire grooves.

[0014] The winding structure of the stator as described above, wherein each of the magnetic poles includes a first trunking, a second trunking, a third trunking, a fourth trunking, a fifth trunking, and a sixth trunking Each of the magnetic pole windings is a coil wound in the first and fourth wire grooves, the second wire groove and the fifth wire groove, and the third wire groove and the sixth wire groove in sequence.

[0015] The winding structure of the stator as described above, wherein the total number of turns of the magnetic pole windings of the two opposite magnetic poles of the stator in the radial direction is equal. That is, the sum of the number of turns of the first pole winding plus the second and eighth pole windings is equal to the sum of the number of turns of the third pole winding plus the fourth and second pole windings, the fifth pole winding A sum of coil turns of the sixth and fourth pole windings, and a sum of coil turns of the seventh pole winding plus the eighth and sixth pole windings.

[0016] A motor having an eight-pole stator comprising a winding structure of a stator as described above, and further comprising a rotor having eight armature magnetic poles and eight armature magnetic poles disposed around eight Rotor coil.

[0017] The motor having the eight-pole stator as described above, wherein the number of coil turns around each of the rotor coils is 5η匝

[0018] According to the foregoing structure, the motor having the eight-pole stator and the winding structure of the stator of the embodiment of the present invention can reduce the rotor by using an asymmetric coil winding to generate an asymmetric magnetic field between any two adjacent magnetic poles. The magnetic impedance of the armature pole is reduced to reduce the loss of the motor, thereby improving the power generation efficiency of the motor. At the same time, by using the characteristics of the different magnetic pole temperatures of the stator, the heat dissipation effect of the motor can be improved, and the power generation is further improved. effectiveness. Brief description of the drawing

DRAWINGS

1 is a plan view showing an embodiment of the present invention.

2 is a schematic view showing the appearance of an embodiment of the present invention.

3 is a schematic view showing the appearance of another embodiment of an embodiment of the present invention.

4 is a schematic view showing the appearance of still another embodiment of an embodiment of the present invention.

[0023] FIG. 5: is a schematic view of the appearance of a conventional motor.

[Description of Reference Signs]

[Invention]

1st stator 11 first magnetic pole

111 first pole winding 112a first trunking

112b second trunking 112c third trunking

112d fourth line slot 112e fifth line slot

112f sixth line slot 12 second magnetic pole

121 second pole winding 122a first trunking

122b second trunking 122c third trunking

122d fourth trough 13 third magnetic pole

131 third pole winding 14 fourth magnetic pole

141 fourth pole winding 15 fifth pole

141 fifth pole winding 16 sixth pole

161 sixth pole winding 17 seventh pole

171 seventh pole winding 18 eighth magnetic pole 181 eighth pole winding

[0027] 2 rotor 21 armature magnetic pole L1 first wire L2 second wire L3 third wire L4 fourth wire [prior art] 9 existing motor 91 stator 92 rotor L1 '

First phase conductor L2 'second phase conductor L3 ' third phase conductor preferred embodiment for carrying out the invention

BEST MODE FOR CARRYING OUT THE INVENTION

The above and other objects, features and advantages of the present invention will become more <RTIgt;

[0029] Referring to FIG. 1, a schematic diagram of an embodiment of a motor having an eight-pole stator includes a stator 1 and a rotor 2, and the stator 1 includes eight magnetic poles, respectively, along a circumferential direction. (for example: clockwise or counterclockwise) a first magnetic pole 11, a second magnetic pole 12, a third magnetic pole 13, a fourth magnetic pole 14, a fifth magnetic pole 15, a sixth magnetic pole 16, a The seventh magnetic pole 17 and an eighth magnetic pole 18 are provided. The first to eighth magnetic poles 1 and 18 are respectively wound with magnetic pole windings, and the magnetic pole windings are formed by concentrating coils around the magnetic poles, and the first, second, third, fourth, fifth The winding turns ratio of the pole windings of the sixth, seventh and eighth magnetic poles 11, 12, 13, 14, 15, 16, 17, 18 is 1: 8: 3: 4: 9: 2: 7: 6. In the present invention, the motor can be implemented as a motor or a generator.

[0030] Specifically, referring to FIG. 2, this embodiment has an embodiment of an electric motor having an eight-pole stator. The number of slots of each pole of the stator 1 may be one; in other words, each The poles contain a single tooth. Accordingly, the tooth portion of the first magnetic pole 11 can be wound around a first magnetic pole winding 111; the tooth portion of the second magnetic pole 12 can be wound around a second magnetic pole winding 121; similarly, the third and fourth The teeth of the fifth, sixth, seventh and eighth magnetic poles 13, 14, 15, 16, 17, 18 are respectively provided with a third, a fourth, a fifth, a sixth, a seventh And an eighth and magnetic pole windings 131, 141, 151, 161, 171, 181. Wherein, if the number of turns of the first pole winding 111 is n, the number of turns of the second pole winding 121 is 8n, the number of turns of the third pole winding 131 is 3n, and the number of turns of the third pole winding 141 is 411. The number of turns of the coil is 4n, the number of turns of the fifth magnetic pole winding 151 is 9n, the number of turns of the sixth magnetic pole winding 161 is 2n, the number of turns of the seventh magnetic pole winding 171 is 7n, and the eighth magnetic pole winding The number of turns of the coil 181 is 6n, so that the first, second, third, fourth, fifth, sixth, seventh and eighth magnetic pole windings 111, 121, 131, The turns ratio of the coils of 141, 151, 161, 171, and 181 can form 1: 8: 3: 4: 9: 2: 7: 6.

Further, the sum of the number of turns of the respective pole windings of the stator 1 can be expressed by the following formula (1):

1η+8η+3η+4η+9η+2η+7η+6η = 40η

(1)

It can be seen from the above that when the number of turns of the first pole winding 111 is η匝, the total number of turns of the respective pole windings of the stator 1 is 40η匝. For example, when the number of turns of the first pole winding 111 is 40 ,, the total number of turns of the respective pole windings of the stator 1 is 1600 匝, which is understood by those skilled in the art.

[0034] Referring to FIG. 1 and FIG. 2, the rotor 2 may have eight armature poles 21, and each of the armature poles 21 may also be wound with the same number of rotor coils, and each of the rotors The armature pole 21 has an air gap between the stator 1. Wherein, it is known that the total number of turns of the respective pole windings of the stator 1 is 40 匝, so that the number of turns of the coils wound around the armature magnetic poles 21 can be expressed by the following equation (2):

40η ÷ 8 = 5η

(2)

[0036] That is, the number of turns of the coils on each of the armature poles 21 may be 5 匝, for example, when the number of turns of the first pole winding 111 is 18 ,, each of the armatures The number of turns of the coil on the magnetic pole 21 is 90 匝.

[0037] Referring to FIG. 3, another embodiment of the motor having the eight-pole stator may have a plurality of slots of the magnetic poles of the stator 1. In other words, each of the magnetic poles includes several Tooth. For example, in this embodiment, each of the magnetic poles includes four wire slots such that the pole pitch of the stator 1 is four. The first magnetic pole 11 includes a first slot 112a, a second slot 112b, a third slot 112c and a fourth slot 112d. The first pole winding 111 is wound around the first to the fourth. The wire slot 112εΓΐ 12 (n匝 coil in 1). Specifically, after a wire is wound around the first wire groove 112a and the third wire groove 112c, the second wire groove 112b and the fourth wire groove 112d are connected. The first magnetic pole winding 111 is formed by winding n. The second magnetic pole 12 also includes a first wire groove 122a, a second wire groove 122b, a third wire groove 122c and a fourth wire groove 122d. The two-pole winding 121 is an 8n-turn coil wound around the first to fourth slots 122εΓΐ22 (1). Similarly, the third to eighth magnetic poles 13, 14, 15, 16, 17, and 18 respectively include one a first wire groove, a second wire groove, a third wire groove and a fourth wire groove, and the third to eighth magnetic pole windings 131, 141, 151, 161, 171, and 181 are respectively 3n, 4n, 9n, 2n, 7n, and 6n turns wound around the first to fourth wire grooves.

[0038] With the above structure, when the motor with the eight-pole stator is actually used, the rotor 2 can be combined with a rotating shaft, and the rotating shaft is driven by a power source (for example, a motor), so that the rotor 2 can be Rotated by the rotating shaft. The main features of the motor having the eight-pole stator and the winding structure of the stator 1 of this embodiment are as follows:

[0039] Although the first, second, third, fourth, fifth, sixth, seventh, and eighth magnetic pole windings 111, 121, 131, 141, 151, 161, 171 on the respective magnetic poles of the stator 1. 181 has a different number of turns of the coil, but the sum of the number of turns of the magnetic pole winding of any two magnetic poles of the stator 1 in the radial direction is equal. More specifically, the coils of the first, second, third, fourth, fifth, sixth, seventh and eighth magnetic pole windings 111, 121, 131, 141, 151, 161, 171, 181 are known. The ratio is formed 1: 8:3:4:9:2:7:6, and the first and fifth magnetic poles 11, 15, the second and sixth magnetic poles 12, 16, the third and seventh magnetic poles 13 17 and the fourth and eighth magnetic poles 14, 18 are respectively opposed in the radial direction, and the total number of coil turns of the first and fifth magnetic pole windings 111, 151 is 10n, and the second and sixth magnetic pole windings 121 The sum of the number of turns of the coil of 1 61 is 10n, the total number of turns of the third and seventh magnetic pole windings 131, 171 is 10 n, and the total number of turns of the fourth and eighth magnetic pole windings 141, 181 is also 10n. The sum of the number of turns of the magnetic pole windings of the two magnetic poles of the stator 1 in the radial direction is equal.

[0040] Further, referring to FIG. 1, the sum of the number of turns of the first magnetic pole winding 111 and the magnetic pole windings (the second and eighth magnetic pole windings 121, 181) on both sides thereof is 15η (the first magnetic pole) The winding 111 is η匝, the second magnetic pole winding 121 is 8η匝, and the eighth magnetic pole winding 181 is 6η匝); the third magnetic pole winding 131 and the magnetic pole windings on both sides thereof (second and fourth magnetic pole windings 121, 141) The sum of the number of turns of the coil is 15η (the third magnetic pole winding 131 is 3η匝, the second magnetic pole winding 121 is 8η匝, the fourth magnetic pole winding 141 is 1⁄2匝); the fifth magnetic pole winding 151 and the magnetic pole windings on both sides thereof ( The sum of the number of turns of the fourth and sixth magnetic pole windings 141, 161) is 15η (the fifth magnetic pole winding 151 is 9η匝, the fourth magnetic pole winding 141 is 1⁄2匝, and the sixth magnetic pole winding 16 1 is 2η匝); The sum of the number of turns of the seventh magnetic pole winding 171 and the magnetic pole windings (the sixth and eighth magnetic pole windings 1 61, 181) on both sides is also 15η (the seventh magnetic pole winding 171 is 7η匝, and the sixth magnetic pole winding 161 is 2η).匝, the eighth magnetic pole winding 181 is 6η匝). In other words, the first magnetic pole winding 111, the third magnetic pole winding 131, the fifth magnetic pole winding 151, and the first magnetic pole winding 111 of the odd magnetic poles which are respectively different in the circumferential direction by 90° The sum of the number of turns of the seven pole windings 171 and the pole windings of the respective two sides is equal.

[0041] Accordingly, this embodiment is equivalent to the sum of the number of turns of the magnetic pole windings of the two magnetic poles of the stator 1 in the radial direction, and the first magnetic pole windings which are respectively 90° out of phase in the circumferential direction. 111. The third magnetic pole winding 131, the fifth magnetic pole winding 151, and the seventh magnetic pole winding 171 are equal to the sum of the coil turns of the magnetic pole windings on the respective two sides thereof, so that the rotor 2 can be driven by the rotating shaft to rotate relative to the stator 1. Achieve the effect of turning balance. The first, second, third, fourth, fifth, sixth, seventh and eighth magnetic pole windings 111, 121, 131, 141, 151, 161, 171, 181 on the magnetic poles of the stator 1 There are different coil turns, so that there is a voltage difference between any two adjacent poles. More specifically, taking the first magnetic pole 11 and the second magnetic pole 12 as an example, the number of turns of the first magnetic pole winding 111 of the first magnetic pole 11 is n, and the coil of the second magnetic pole winding 121 of the second magnetic pole 12 is The number is 8n, according to which, when the first to eighth magnetic pole windings 111, 121, 131, 141, 151, 161, 171, 181 are supplied with current, the first magnetic pole winding 111 and the second magnetic pole winding 121 The equivalent voltage is different, so that there is a voltage difference between the first magnetic pole 11 and the second magnetic pole 12, so that the first magnetic pole 11 and the second magnetic pole 12 can generate magnetic fields of different strengths. According to this, when the armature magnetic pole 21 of the rotor 2 rotates between the first magnetic pole 11 and the second magnetic pole 12, the magnetic field strength difference between the first magnetic pole 11 and the second magnetic pole 12 is used to reduce the armature magnetic pole 21 The magnetic impedance that is received allows the rotor 2 to rotate more smoothly.

[0042] It is worth noting that, in order to ensure that the magnitude of the difference in magnetic field strength generated between any two adjacent magnetic poles is sufficient to reduce the magnetic impedance of the armature magnetic pole 21, the total number of coil turns of each magnetic pole winding of the stator 1 is greater. Preferably, the number of turns of the first pole winding 111 is preferably greater than or equal to 18 匝, such that 40 n ≥ 720 o. More specifically, the sum of the turns of the respective pole windings of the stator 1 is known. It is positively correlated with the voltage generated when the stator 1 is operated. Therefore, the design makes the total number of coil turns greater than or equal to 720 匝, and it is indeed possible to increase the difference in magnetic field strength generated between two adjacent magnetic poles. Furthermore, by designing that the total number of turns of the coil is greater than or equal to 720 匝, the stator 1 can satisfy the high voltage/low current operating condition, and at the same time reduce the thickness required for the silicon steel sheet constituting the stator 1, and the stator can be further reduced. 1 weight and manufacturing cost

[0043] Furthermore, since the magnetic pole windings on the respective magnetic poles of the stator 1 have different number of coil turns, the equivalent voltage of each of the magnetic pole windings is different. Therefore, when the motor of the embodiment having the eight-pole stator is actually operated, the temperature rise of each of the magnetic poles will be different. More specifically, the first magnetic pole 11 opposite in the radial direction Taking the fifth magnetic pole 15 as an example, the number of turns of the first magnetic pole winding 111 of the first magnetic pole 11 is n, and the number of turns of the fifth magnetic pole winding 151 of the fifth magnetic pole 15 is 9n, so the fifth magnetic pole 15 The temperature rise will be greater than the first pole 11; in other words, the first pole 11 is maintained at a relatively low temperature during operation, and the fifth pole 15 is maintained at a relatively high temperature during operation. Thereby, although the armature magnetic pole 21 of the rotor 2 rotates through the fifth magnetic pole 15, it may be affected by the relatively high temperature of the fifth magnetic pole 15 to generate a temperature rise; however, the armature magnetic pole 21 rotates through the first magnetic pole. At 11 o'clock, since the first magnetic pole 11 has a relatively low temperature, the thermal energy of the armature magnetic pole 21 can be effectively dissipated. Therefore, it can be seen that the motor having the eight-pole stator utilizes the characteristics of different magnetic pole temperatures of the stator 1, so that the heat energy received by the rotor 2 during the rotation can be easily conducted inside the motor, thereby improving the motor. Cooling effect and energy efficiency.

[0044] In summary, since the magnetic impedance of the armature magnetic pole causes loss of the motor when the rotor of the motor rotates relative to the stator, the motor of the embodiment having the eight-pole stator and the winding structure of the stator 1 are The first, second, third, fourth, fifth, sixth, seventh and eighth magnetic pole windings 111, 121, 131, 141, 151, 161, 171, 181 on each magnetic pole of 1 have different The number of turns of the coil can be appropriately designed to make the first, second, third, fourth, fifth, sixth, seventh and eighth magnetic pole windings 111, 121, 1 31, 141, 151, 161, 171, The coil turns ratio of 181 is 1: 8: 3: 4: 9: 2: 7: 6, to ensure that the rotor 2 is rotated and achieves the balance of rotation and energy efficiency, and the use of any two adjacent magnetic poles The difference in magnetic field strength generated between the two effectively reduces the magnetic impedance of the armature pole 21 to reduce the loss of the motor, thereby improving the power generation efficiency or the maximum mechanical torque of the eight-pole stator motor of this embodiment.

[0045] Furthermore, it is known that when the overall temperature of the motor increases, the magnetic loss caused by the iron loss (including its magnetic hysteresis loss and eddy current loss) and the resistance loss and eddy current loss of the copper coil of the motor increase. , causing the virtual work of the motor to increase, resulting in a significant drop in power generation efficiency. In the embodiment of the present invention, the motor having the eight-pole stator and the winding structure of the stator 1 can utilize the different magnetic pole temperatures of the stator 1 to make the heat energy received by the rotor 2 during the rotation process easy to be conducted inside the motor. In turn, the heat dissipation effect of the motor is improved. Accordingly, by reducing the loss of the iron core and the copper coil, the overall temperature of the motor having the eight-pole stator can be lowered to limit the iron loss and the copper loss, further improving the power generation efficiency or increasing the maximum torque that can be obtained. It will be understood by those skilled in the art that when the eight-pole stator 1 of the embodiment of the present invention generates an alternating magnetic field at its magnetic poles by energization, the eight-pole stator 1 can drive the rotor to rotate. Since the magnetic field of the octopole stator 1 is generated by inductive rotor rotation, this effect is a feedback operation. Since the driving force portion of the rotor is provided by the rotor itself, the efficiency of the motor can be improved. Due to the above-described eight-pole stator winding method, in addition to improving the heat dissipation efficiency of the motor, the operating efficiency of the motor can be improved. Thus, it can be proved that the winding structure of the eight-pole stator 1 can be used to fabricate a motor, and the temperature thereof is only slightly higher than the temperature before the operation of the existing motor.

[0047] In order to highlight that the motor having the eight-pole stator of the embodiment of the present invention does have higher power generation efficiency than the existing motor, the embodiment has an eight-pole stator motor and a three-phase motor using the eight-pole stator. The wiring method is used for actual testing. Referring to FIG. 4, this embodiment has a further embodiment of the motor having an eight-pole stator. In this embodiment, each of the magnetic poles includes six wire slots such that the pole pitch of the stator 1 is six. The first magnetic pole 11 includes a first slot 112a, a second slot 112b, a third slot 112c, a fourth slot 112d, a fifth slot 112e, and a sixth slot 112f. A pole winding 111 is an n匝 coil wound around the first to sixth slot 112T1l12f. Specifically, after a wire is wound around the first wire groove 112a and the fourth wire groove 112d, the second wire groove 112b and the fifth wire groove 112e are wound around the second wire groove, and finally the third wire groove is finally wound. The first magnetic pole winding 111 can be formed by enclosing the 112c and the sixth linear groove 112f. Similarly, the second to eighth magnetic poles 12, 13, 14, 15, 16, 17, 18 also respectively include a first trunking, a second trunking, a third trunking, a fourth trunking, and a first a fifth line slot and a sixth line slot, and the second to eighth pole windings 121, 131, 141, 151, 161, 171, 181 are respectively 3n wound around the first to sixth slot 4n, 9n, 2n, 7n and 6n匝 coils. The sum of the number of turns of each of the magnetic pole windings of the stator 1 is 720 匝, that is, the number of turns of the first magnetic pole winding 111 is 18 匝.

[0048] It is noted that, in this embodiment, the motor having the eight-pole stator is a single-phase eight-pole motor, and accordingly, the magnetic pole winding of the two magnetic poles of the stator 1 in the radial direction may be It is formed by winding the same wire. More specifically, the first magnetic pole winding 111 and the fifth magnetic pole winding 151 may be formed by winding a first wire L1, and the second magnetic pole winding 121 and the sixth magnetic pole winding 161 may be wound by a second wire L2. The third magnetic pole winding 131 and the seventh magnetic pole winding 171 may be wound by a third wire L3, and the fourth magnetic pole winding 141 and the eighth magnetic pole winding 181 may be wound by a fourth wire L4, and The first wire L1, the second wire L2, the third wire L3 and the fourth wire L4 may be connected in parallel to each other in parallel, and the invention is not limited thereto.

Referring to FIG. 5, a conventional three-phase eight-pole motor 9, the conventional motor 9 includes a stator 91 and a rotor 92, and the pole pitch of the stator 91 is also 6. The existing motor 9 is wound by a first phase conductor L1 ′, a second phase conductor L2 ′ and a third phase conductor L3 ′ between the respective poles of the stator 91 with the same number of turns, and the stator 91 The total number of turns of the coils around which the magnetic poles are connected is 720 匝. The stator 91 can be wound with a full pitch or a short pitch, and the winding method for the stator 91 can be understood by those skilled in the art, and the prior patents of the US Patent Application No. 12/566, 723, etc. The winding method of the stator 91 has been disclosed and will not be described again.

[0050] It can be seen that this embodiment has a motor with an eight-pole stator and the prior motor 9 is an eight-pole 48-slot motor, and the stator 1 and the stator 91 of the existing motor 9 In the middle, the total number of turns of the coils around each magnetic pole is 720 匝. Thereby, the rotor 2 and the rotor 92 of the existing motor 9 are driven by an electric motor having an output power of 10 hp, 7.5 watts and a rated speed of 1800 rpm, and an electric heating tube having a rated power of 6 kW and a rated voltage of 220 V is used as the motor. For the load, the test data shown in Table 1 below can be measured. Wherein, the existing motor 9 is a three-phase motor, and the output side L12 ′ between the first phase conductor L1 ′ and the second phase conductor L2 ′ and the second phase conductor L2 ′ and the third phase conductor L3 respectively Test between the 'output side L23'.

Table 1

[] [Table 1]

[0052] As can be seen from the above table 1, although this embodiment has an eight-pole 48-slot motor having the same total number of turns of the coil as the motor of the eight-pole stator, the embodiment produces The reactive power (0.6) is significantly less than the reactive power generated by the existing motor 9 (about 1.85), making the power factor (0.9995) of this embodiment superior to the power factor of the prior motor 9. About 0. 86). Accordingly, the motor of the embodiment of the present invention having an eight-pole stator has a small virtual work, and it is indeed capable of improving its power generation efficiency. It is worth mentioning that the phase angle (5°) of the electrical energy outputted by the embodiment is significantly smaller than the phase angle of the electrical energy output by the existing motor 9 (about 30.5°), so another evidence is provided to prove the embodiment of the present invention. An electric machine having an eight-pole stator has a small virtual work, and the motor having the eight-pole stator and the winding structure of the stator of the embodiment of the present invention can achieve higher energy conversion efficiency.

[0053] Furthermore, the reactive power generated by the conventional motor 9 (about 1.85) is about three times that of the reactive power (0.6) generated by the embodiment, and thus the overall temperature during operation. It is bound to be higher than the motor of the embodiment having an eight-pole stator. In addition, for comparison, by actually measuring the temperature of each magnetic pole of the stator 1, it can be found that among the eight magnetic poles, the lowest temperature is 45° of the first magnetic pole 11; 75° of the fifth magnetic pole 15, it is obvious that the temperature of each magnetic pole of the stator 1 is different, and the difference is up to 2.5 times, because an armature magnetic pole 21 of the rotor 2 passes the fifth magnetic pole with the highest temperature. The stroke of 15 only accounts for 1/8 of its complete stroke, which indeed contributes to the thermal energy dissipation of the armature pole 21, so that the heat energy received by the rotor 2 during the rotation is easily conducted inside the motor, thereby lifting the motor. Cooling effect. Accordingly, the motor having the eight-pole stator of this embodiment does reduce its overall temperature to limit its iron loss and copper loss, so that the power generation efficiency can be effectively improved compared with the conventional motor 9.

[0054] In summary, the motor with the eight-pole stator and the winding structure of the stator can reduce the magnetic impedance of the rotor and improve the heat dissipation effect of the motor, so as to improve the motor with the eight-pole stator. Power generation and energy efficiency.

[0055]

Claims

Claim

A winding structure of a stator, characterized in that it comprises: a stator comprising a first magnetic pole, a second magnetic pole, a third magnetic pole, a fourth magnetic pole, a fifth arranged in a circumferential direction And a magnetic pole, a second magnetic pole, The turns ratio of the fifth magnetic pole, the sixth magnetic pole, the seventh magnetic pole and the eighth magnetic pole of the magnetic pole winding is 1: 8: 3: 4: 9: 2: 7: 6, and the magnetic pole windings of the stator 1 The sum of the turns of the coil is 40n, of which 40n ^ 7 20 .

A winding structure for a stator according to claim 1, wherein: said first magnetic pole is provided with a first magnetic pole winding, said second magnetic pole is provided with a second magnetic pole winding, and said third magnetic pole is provided for winding one a third magnetic pole winding, the fourth magnetic pole is provided with a fourth magnetic pole winding, the fifth magnetic pole is for winding a fifth magnetic pole winding, and the sixth magnetic pole is for winding a sixth magnetic pole winding, the seventh magnetic pole is wound a seventh magnetic pole winding is disposed, the eighth magnetic pole is wound around an eighth magnetic pole winding, and the number of turns of the first magnetic pole winding is n, the number of turns of the second magnetic pole winding is 8n, the third magnetic pole winding The number of turns of the coil is 3n, the number of turns of the fourth magnetic pole winding is 4n, the number of turns of the fifth magnetic pole winding is 9n, the number of turns of the sixth magnetic pole winding is 2n, and the coil of the seventh magnetic pole winding The number of turns is 7n, and the number of turns of the eighth magnetic pole winding is 6n.

The winding structure of the stator according to claim 2, wherein: each of the magnetic poles of the stator includes a single tooth portion, and the tooth portion of the first magnetic pole is disposed around the first magnetic pole winding, and the tooth portion of the second magnetic pole is provided Winding around the second magnetic pole winding, the tooth portion of the third magnetic pole is wound around the third magnetic pole winding, the tooth portion of the fourth magnetic pole is wound around the fourth magnetic pole winding, and the tooth portion of the fifth magnetic pole is provided for winding The fifth magnetic pole winding, the tooth portion of the sixth magnetic pole is disposed around the sixth magnetic pole winding, and the tooth portion of the seventh magnetic pole is disposed around the seventh magnetic pole winding, and the tooth portion of the eighth magnetic pole is provided for winding Eight pole windings.

A winding structure for a stator according to claim 2, wherein: the number of the slots of each of the magnetic poles of the stator is several such that each of the magnetic poles includes a plurality of teeth. The winding structure of the stator according to claim 4, wherein each of the magnetic poles comprises a first wire groove, a second wire groove, a third wire groove and a fourth wire groove, and each of the magnetic pole windings is sequentially wound. Coils disposed in the first and third wire grooves and the second and fourth wire grooves.

A winding structure for a stator according to claim 4, wherein: each of said magnetic poles comprises a first wire groove, a second wire groove, a third wire groove, a fourth wire groove, a fifth wire groove and a first The six-wire slot, each of the pole windings is a coil wound in the first and fourth trunking grooves, the second and fifth trunking slots, and the third and sixth trunking slots. The winding structure of the stator according to claim 2, 3, 4, 5 or 6, wherein: the total number of turns of the magnetic pole windings of the two opposite magnetic poles of the stator in the radial direction is equal, and the first The sum of the number of turns of the pole winding plus the second and eighth pole windings is equal to the sum of the turns of the third pole winding plus the fourth and second pole windings, and the fifth pole winding plus the sixth sum The sum of the number of turns of the fourth pole winding and the sum of the turns of the seventh pole winding plus the eighth and sixth pole windings.

An electric machine having an eight-pole stator, characterized in that the electric machine comprises the winding structure of the stator according to claim 2, 3, 4, 5 or 6, and further comprising: a rotor having eight armatures a magnetic pole, each of the armature poles is wound around a rotor coil.

A motor having an eight-pole stator according to claim 8, wherein: the number of turns of the rotor coil wound around each of the armature poles is 5 匝.