CN109038903B - Two-phase fractional slot hollow compensation pulse generator - Google Patents
Two-phase fractional slot hollow compensation pulse generator Download PDFInfo
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- CN109038903B CN109038903B CN201810892093.1A CN201810892093A CN109038903B CN 109038903 B CN109038903 B CN 109038903B CN 201810892093 A CN201810892093 A CN 201810892093A CN 109038903 B CN109038903 B CN 109038903B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/18—Windings for salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K39/00—Generators specially adapted for producing a desired non-sinusoidal waveform
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention relates to a two-phase fractional slot air-core compensation pulse generator, which comprises a stator and a rotor, wherein the stator comprises two-phase armature windings, the two-phase armature windings have 90-degree electrical angles, each two-phase armature winding consists of 2 coils, all the coils of the two-phase windings are concentric concentrated windings, all the coils of the two-phase windings are uniformly distributed in a stator space, the coils of different phases are distributed in a staggered manner, no gap is reserved between every two adjacent coils, the rotor comprises an excitation winding, the excitation winding consists of six excitation coils, the pulse generator is a pulse motor with two phases, four slots and six poles, and meets the fractional slot winding pole number combination constraint condition with the pitch of 1, so that the problem of cross overlapping of the coil ends of different phases of the traditional distributed windings is avoided, and the manufacturing difficulty of the stator winding of the air-core pulse generator is greatly reduced, and meanwhile, the discharge output capacity of the motor can be effectively improved.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a two-phase fractional slot hollow compensation pulse generator.
Background
The existing hollow compensation pulse generator adopts composite material with high strength/density ratio to replace traditional ferromagnetic material, thereby improving the energy density and power density of the motor. Because the composite material is non-magnetic and poor in processability, the motor is usually designed to be of a slotless structure, a stator armature winding of the motor is generally processed to be in a concentric runway shape, the whole volume is large, and the stator armature winding is bonded on the inner wall of the stator by using epoxy resin. For a motor adopting a two-phase armature winding structure, the existing integral-slot distributed winding design structure is difficult to avoid the cross overlapping of the two-phase winding end parts, so that additional shaping treatment is required, and great difficulty is brought to the manufacturing of the winding.
Disclosure of Invention
The invention aims to solve the technical problem of providing a two-phase fractional slot air-core compensation pulse generator which can avoid cross overlapping at the end parts of two-phase windings and reduce the manufacturing difficulty.
The invention adopts the technical scheme that the two-phase fractional slot hollow-core compensation pulse generator comprises a stator and a rotor, wherein the stator comprises two-phase armature windings, the two-phase armature windings have 90-degree electrical angles, the two-phase armature windings are composed of 2 coils, all the coils of the two-phase windings are concentric concentrated windings, the number of turns, the cross-sectional area and the structure of the coils are completely the same, the coils are made of transposition litz wires and adopt a slotless structure, all the coils of the two-phase windings are uniformly distributed in a stator space, the coils of different phases are distributed in a staggered manner, no gap is reserved between every two adjacent coils, the rotor comprises an excitation winding, and the excitation winding consists of six excitation coils.
The invention has the beneficial effects that: although the coil adopts a slotless structure in a mechanical structure, in an electrical structure, a motor stator has 4 coils, and no gap is left between the coils, which is equivalent to a motor having 4 virtual slots (Z ═ 4), so that the two-phase fractional slot air-core compensation pulse generator is a pulse generator having 2 phases (m ═ 2), 4 slots (Z ═ 4), and 6 poles (2p ═ 6), the number of slots per phase of each pole of the pulse generator is a fraction (q ═ Z/2pm ═ 1/3), and the fractional slot winding number combination constraint condition of the pitch 1 is satisfied, that is, a stator armature winding can adopt a double-layer centralized winding structure with the pitch of 1, thereby avoiding the problem of cross overlapping of coil ends of different phases of a traditional distributed winding, and greatly reducing the manufacturing difficulty of the stator winding of the air-core pulse generator. Meanwhile, the length of the end part of the concentrated winding is small, the impedance of the end part of the motor is reduced, and the discharge output capacity of the motor can be effectively improved.
Preferably, the stator further includes a stator yoke and a stator sheath, the two-phase armature winding is adhered to the stator sheath by epoxy resin, the stator yoke is wound on the two-phase armature winding by applying a pre-tightening force, and the armature winding is firmly fixed between the stator yoke and the stator sheath by adopting the structure, so that electromagnetic force generated at the moment of discharge is overcome.
Preferably, the stator sheath is a cylindrical structure formed by winding high-strength glass fibers, and the stator yoke is formed by winding the high-strength glass fibers on the two-phase armature windings to form a cylindrical structure.
Preferably, the rotor further comprises a rotor yoke, a rotor sheath and a rotating shaft, the excitation winding of the rotor is bonded on the rotor yoke through epoxy resin, the rotor sheath is wound on the excitation winding by applying pretightening force, and by adopting the structure, the excitation winding can be firmly fixed between the rotor yoke and the rotor sheath, so that the centrifugal force of high-speed rotation is overcome.
Preferably, the rotor yoke has a cylindrical structure formed by winding high-strength glass fibers, and the rotor sheath is formed by winding high-strength carbon fibers around the field winding to form the cylindrical structure.
Preferably, the rotor yoke is bonded to the rotating shaft with an epoxy resin, and the rotating shaft is made of a material having high strength and non-magnetic permeability.
Drawings
FIG. 1 is a schematic structural diagram of a two-phase fractional-slot air-core compensated pulse generator according to the present invention;
as shown in fig. 1: 1. an A-phase armature winding; 2. a B-phase armature winding; 3. a stator yoke; 4. a stator sheath; 5. an excitation winding; 6. a rotor yoke; 7. a rotor sheath; 8. a rotating shaft.
Detailed Description
The invention is further described below with reference to the accompanying drawings in combination with specific embodiments so that those skilled in the art can practice the invention with reference to the description, and the scope of the invention is not limited to the specific embodiments.
The invention relates to a two-phase fractional slot air-core compensation pulse generator, which comprises a stator and a rotor, wherein the stator comprises two-phase armature windings, as shown in figure 1, the two-phase armature windings are an A-phase armature winding 1 and a B-phase armature winding 2, and the A-phase armature winding 1 and the B-phase armature winding 2 are different from each other by 90 electrical angles, wherein the A-phase armature winding 1 consists of two coils (an A1 coil and an A2 coil), the B-phase armature winding 2 consists of two coils (a B1 coil and a B2 coil), namely, the two-phase winding totally comprises four coils which are concentric concentrated windings, the number of turns, the cross-sectional area and the structure of the four coils are completely the same, the four coils are made of transposed litz wires and adopt a slotless structure, A1, A2, B1 and B2 are uniformly distributed in a stator space, A1 and A2 are spaced by B1 and B2, namely, the coils of different phases are distributed in a staggered way, and no gap is left between two adjacent coils, the rotor comprises an excitation winding 5, and the excitation winding 5 consists of six excitation coils. Wherein, the 2 coils of each phase armature winding can be connected in series or in parallel according to requirements. The six excitation coils may be connected in series or in parallel as required.
In fig. 1, four armature coils are mechanically constructed without slots, but in an electrical structure, a motor stator has four coils, and no gap is left between the coils, which is equivalent to that the motor has four virtual slots (Z ═ 4), the two-phase fractional slot air-core compensation pulse generator in fig. 1 is a pulse motor with two phases (m ═ 2), four slots (Z ═ 4) and six poles (2p ═ 6), the number of slots per phase per pole of the pulse motor is fractional (q ═ Z/2pm ═ 1/3), and the fractional slot winding slot pole number combination constraint condition with the pitch of 1 is satisfied, the stator armature winding can adopt a double-layer centralized winding structure with the pitch of 1, so that the problem of cross overlapping of the coil ends of different phases of the traditional distributed winding is avoided, and the manufacturing difficulty of the stator winding of the hollow pulse generator is greatly reduced. Meanwhile, the length of the end part of the concentrated winding is small, the impedance of the end part of the motor is reduced, and the discharge output capacity of the motor can be effectively improved.
Wherein, the constraint condition of the fractional slot winding slot pole number combination with the pitch of 1 is as follows:
1) z/m is an integer (Z/m is 2), each phase is divided into the same number of slots, and windings of each phase are symmetrical;
2) p/m ≠ integer (p/m ≠ 3/2), i.e. p is not allowed to be a multiple of m;
3)Z＝2p0n, where Z is an odd number, N is an odd number, 1, 2, 3 …; when Z is an even number, N should be an even number.
In the present invention, the reason why two phases (m ═ 2) are selected is:
the pulse generator with the two-phase structure is adopted, a plurality of short pulses can be synthesized into a wide pulse meeting the load requirement by controlling the closing angle of each phase of winding, the restriction relation between the rotating speed and the pulse width of the motor is decoupled, not only can enough pulse width be obtained, but also the rotating speed can be improved, so that higher energy storage density can be obtained, the output waveform has more flexibility, and the pulse generator is particularly suitable for driving high-energy electromagnetic emission. In order to enable each phase to be controlled independently, the two phase windings are 90 electrical degrees apart from each other, avoiding electromagnetic coupling between the phase windings.
The reason for choosing hexapole (2p ═ 6) is:
the motor is a two-phase motor, namely m is a fixed value, and in order to satisfy p/m ≠ integer, only odd numbers such as 1, 3, 5 and the like can be selected for the pole pair number p of the motor. For the air-core pulse generator, because of no constraint of ferromagnetic materials, the air gap flux density amplitude is exponentially attenuated along with the increase of the pole pair number p, and therefore, the design of the pole pair number of the motor is smaller, and the better. And when p is 1, the electromagnetic field analysis shows that the excitation magnetic field of the motor passes through the rotating shaft at a constant value, a non-magnetic rotating shaft and a bearing are required to be adopted, and a corresponding electromagnetic shielding measure is designed to overcome the additional eddy current loss generated on the rotating shaft by the variable magnetic field during self-excitation. Meanwhile, when the 1-pair-pole motor is in discharge operation, the problems of uneven stress of the rotor and easy polarization and stress concentration are also caused. In summary, the number of poles of the motor of the present invention is 6 (2 p-6).
The reason why the four slots (Z ═ 4) are selected is:
the motor is a two-phase motor, namely m is 2 which is a fixed value, and in order to satisfy that Z/m is an integer, the number Z of slots of the motor is an even number; in order to satisfy constraint 3, considering that the number of motor poles is already determined as 6 (2 p-6), and considering that the winding coefficient is larger as N is smaller, N-2 is taken, and Z may be set to 4 and 8. Through further electromagnetic field analysis, when Z is 4, the winding coefficient of the armature winding is 0.783; when Z is 8, the winding factor of the armature winding is only 0.522. In summary, the number of slots of the motor of the present invention is 4 (Z equals 4).
As shown in fig. 1, the stator further includes a stator yoke 3 and a stator sheath 4, the two-phase armature winding is adhered to the stator sheath 4 through epoxy resin, the stator yoke 3 is wound on the two-phase armature winding by applying a pre-tightening force, and by adopting the structure, the armature winding is firmly fixed between the stator yoke 3 and the stator sheath 4, so as to overcome the electromagnetic force generated at the moment of discharging.
As shown in fig. 1, the stator sheath 4 is a cylindrical structure formed by winding high-strength glass fibers, and the stator yoke 3 is formed by winding the high-strength glass fibers around the two-phase armature windings to form a cylindrical structure.
As shown in fig. 1, the rotor further includes a rotor yoke 6, a rotor sheath 7 and a rotating shaft 8, the field winding 5 of the rotor is bonded on the rotor yoke 6 through epoxy resin, the rotor sheath 7 is wound on the field winding 5 by applying a pre-tightening force, and with this structure, the field winding 5 can be firmly fixed between the rotor yoke 6 and the rotor sheath 7, so as to overcome the centrifugal force of high-speed rotation.
As shown in fig. 1, the rotor yoke 6 is a cylindrical structure formed by winding high-strength glass fibers, and the rotor sheath 7 is formed by winding high-strength carbon fibers around the field winding 5.
As shown in fig. 1, the rotor yoke 6 is bonded to the rotating shaft 8 with epoxy resin, and the rotating shaft 8 is made of a high-strength and non-magnetic material.
Claims (5)
1. A two-phase fractional slot air-core compensation pulse generator comprises a stator and a rotor, and is characterized in that: the stator comprises two-phase armature windings, the two-phase armature windings are different from each other by 90-degree electrical angles, each two-phase armature winding consists of two coils, all the coils of each two-phase armature winding are concentric concentrated windings, the number of turns, the cross-sectional area and the structure of each coil are completely the same, the coils are made of transposed litz wires and adopt a slotless structure, all the coils of each two-phase armature winding are uniformly distributed in a stator space, the coils of different phases are distributed in a staggered mode, no gap is reserved between every two adjacent coils, the rotor comprises an excitation winding (5), and the excitation winding (5) consists of six excitation coils;
the stator also comprises a stator yoke (3) and a stator sheath (4), the two-phase armature winding is bonded on the stator sheath (4) through epoxy resin, and the stator yoke (3) is wound on the two-phase armature winding by applying pretightening force.
2. The two-phase fractional-slot air-core compensated pulse generator of claim 1, wherein: the stator sheath (4) is a cylindrical structure formed by winding high-strength glass fibers, and the stator yoke (3) is wound on the two-phase armature winding by the high-strength glass fibers to form the cylindrical structure.
3. The two-phase fractional-slot air-core compensated pulse generator of claim 1, wherein: the rotor also comprises a rotor yoke (6), a rotor sheath (7) and a rotating shaft (8), the excitation winding (5) of the rotor is bonded on the rotor yoke (6) through epoxy resin, and the rotor sheath (7) is wound on the excitation winding (5) by applying pretightening force.
4. A two-phase fractional slot air-core compensated pulse generator as claimed in claim 3, wherein: the rotor yoke (6) is a cylindrical structure formed by winding high-strength glass fibers, and the rotor sheath (7) is wound on the excitation winding (5) by adopting high-strength carbon fibers to form the cylindrical structure.
5. A two-phase fractional slot air-core compensated pulse generator as claimed in claim 3 or claim 4, wherein: the rotor yoke (6) is bonded to the rotating shaft (8) through epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810892093.1A CN109038903B (en) | 2018-08-07 | 2018-08-07 | Two-phase fractional slot hollow compensation pulse generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810892093.1A CN109038903B (en) | 2018-08-07 | 2018-08-07 | Two-phase fractional slot hollow compensation pulse generator |
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| Publication Number | Publication Date |
|---|---|
| CN109038903A CN109038903A (en) | 2018-12-18 |
| CN109038903B true CN109038903B (en) | 2020-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810892093.1A Active CN109038903B (en) | 2018-08-07 | 2018-08-07 | Two-phase fractional slot hollow compensation pulse generator |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474506B (en) * | 2019-09-27 | 2020-06-09 | 哈尔滨工业大学 | Brushless self-excitation magnetic pulse generator |
| CN110556950B (en) * | 2019-09-29 | 2020-06-09 | 哈尔滨工业大学 | Internal rotor cooling type pulse generator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1707919A (en) * | 2004-06-07 | 2005-12-14 | 陈金涛 | Inserted iron-core axial magnetic field permanent magnetic disc type electric machine |
| TWI311002B (en) * | 2005-04-29 | 2009-06-11 | Young-Chun Jeung | Two-phase brushless dc motor |
| CN101814818A (en) * | 2010-04-27 | 2010-08-25 | 哈尔滨工业大学 | Stator double-armature winding air-cored pulse generator and method thereof for realizing pulse discharge |
| CN102638152A (en) * | 2012-04-27 | 2012-08-15 | 哈尔滨工业大学 | Two-phase hollow-core compensation pulse generator and method for realizing pulse discharge |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2772110Y (en) * | 2004-12-29 | 2006-04-12 | 孔艳丽 | Dual-way controllable single-phase alternating-current permanent-magnet synchronous motor |
| CN103501100A (en) * | 2013-10-21 | 2014-01-08 | 哈尔滨工业大学 | Integrated compensation pulse generating set |
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2018
- 2018-08-07 CN CN201810892093.1A patent/CN109038903B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1707919A (en) * | 2004-06-07 | 2005-12-14 | 陈金涛 | Inserted iron-core axial magnetic field permanent magnetic disc type electric machine |
| TWI311002B (en) * | 2005-04-29 | 2009-06-11 | Young-Chun Jeung | Two-phase brushless dc motor |
| CN101814818A (en) * | 2010-04-27 | 2010-08-25 | 哈尔滨工业大学 | Stator double-armature winding air-cored pulse generator and method thereof for realizing pulse discharge |
| CN102638152A (en) * | 2012-04-27 | 2012-08-15 | 哈尔滨工业大学 | Two-phase hollow-core compensation pulse generator and method for realizing pulse discharge |
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