CN115483785A - Harmonic magnetic field driven electric excitation motor - Google Patents

Harmonic magnetic field driven electric excitation motor Download PDF

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Publication number
CN115483785A
CN115483785A CN202210891279.1A CN202210891279A CN115483785A CN 115483785 A CN115483785 A CN 115483785A CN 202210891279 A CN202210891279 A CN 202210891279A CN 115483785 A CN115483785 A CN 115483785A
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Prior art keywords
stator
magnetic field
rotor
winding
pole
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Inventor
周建民
许恒帅
贺海亮
刘培海
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Ningbo Hengshuai Co ltd
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Ningbo Hengshuai Co ltd
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Priority to CN202210891279.1A priority Critical patent/CN115483785A/en
Priority to PCT/CN2022/117670 priority patent/WO2024021238A1/en
Publication of CN115483785A publication Critical patent/CN115483785A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles
    • 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
    • H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

A harmonic magnetic field driven electrically excited machine comprising: A. the stator is provided with a plurality of tooth grooves, and the number of the grooves is Z; B. in a 360-degree mechanical space of the circumference of the stator, the stator winding is divided into m phases according to a set connection rule; C. any phase winding of the stator component with the stator windings is electrified with direct current constant current, and the number of pole pairs of a formed phase winding magnetic field is Pm in a 360-degree mechanical space of the circumference of the stator; D. the number of coils contained in each phase of stator winding is k = n × Pm (n =1,2,3 …), and double-layer windings are adopted; E. the magnetic poles of the rotor pole shoes are sequentially arranged in the circumferential direction according to the sequence of N poles and S poles through the excitation winding, and the number of the formed magnetic pole pairs of the rotor pole shoes is Pr along the mechanical space of 360 degrees of the rotor circumference; F. forming a motor air gap in a circumferential 360-degree mechanical space between the stator and the rotor; the magnetic pole pairs Pr of the pole shoes of the rotor must satisfy: pr = Z ± Pm, wherein the number of stator slots Z: z = m × k.

Description

Harmonic magnetic field driven electric excitation motor
Technical Field
The invention relates to a motor, in particular to a harmonic magnetic field driven electric excitation motor.
Background
The motor is used as a device for converting electric energy into rotary mechanical energy, and plays an extremely important role in social production and life. The traditional electric excitation motor is convenient to control, good in assembly performance, high in reliability, generally used in high-power occasions, relatively complex in structure, strict in production process and durable in use, and has the advantages of controlling the magnetic field intensity by controlling the excitation current and achieving the purpose of speed regulation. Despite the advantages of the electrically excited motor, the energy saving effect, the production cost and the volume of the motor are inferior compared with the permanent magnet motor. Therefore, it is highly desirable to design an electric excitation motor driven by a harmonic magnetic field.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an electric excitation motor driven by a harmonic magnetic field, so as to reduce the volume, improve the power density, and achieve the effect of energy saving.
The technical scheme adopted by the invention for solving the existing problems is as follows: a harmonic magnetic field driven electrically excited machine comprising: rotor subassembly, stator module, control module and pencil, the pencil passes through welded connection with control module, and control module passes through reference column and elasticity fixing clip and is fixed in stator module, the pencil passes the radial hole that stator module set up and draws from the axial hole, and the bearing that stator module set up plays support and positioning action to rotor subassembly, and the circular direction is rotatory along to harmonic magnetic field drive electric excitation motor circular telegram rotor subassembly, and the primary structure expression is as follows:
A. the stator is provided with a plurality of tooth grooves, and the number of the grooves is Z;
B. in a 360-degree mechanical space of the circumference of the stator, the stator winding is divided into m phases according to a set connection rule;
C. any phase winding of the stator component with the stator windings is electrified with direct current constant current, and the number of pole pairs of a formed phase winding magnetic field is Pm in a 360-degree mechanical space of the circumference of the stator;
D. the number of coils contained in each phase of stator winding is k = n × Pm (n =1,2,3 …), and double-layer windings are adopted;
E. the magnetic poles of the rotor pole shoes are sequentially arranged in the circumferential direction according to the sequence of N poles and S poles through the excitation winding, and the number of the formed magnetic pole pairs of the rotor pole shoes is Pr along the 360-degree mechanical space of the rotor circumference;
F. a motor air gap is formed in a circumferential 360 ° mechanical space between the stator and the rotor.
The magnetic pole pair Pr of the pole shoe of the rotor must satisfy the following conditions: pr = Z ± Pm, wherein the number of stator slots Z: z = m × k.
The embodiment of the invention is designed to ensure that the number of stator slots Z =15, the number of magnetic pole pairs of rotor pole shoes Pr =10, the number of pole pairs Pm =5 of each phase line packet, and the number of phase line packets k =5.
More specifically, the harmonic magnetic field driven electric excitation motor of the present invention is further explained:
principle of harmonic magnetic field driving electric excitation motor:
A. whether the BLDC control or the PMSM control is adopted, the necessary condition of the rotation of the motor rotor is that the number of the magnetic field pole pairs generated by the stator winding in the air gap of the motor is equal to the number of the magnetic pole pairs of the pole shoes of the rotor;
B. after the stator winding is electrified, fundamental wave magnetomotive force is generated in an air gap of the motor, and a series of harmonic magnetic fields are distributed along the air gap space under the action of stator tooth slot magnetic conductance;
C. when the pole pair number of the specific air gap harmonic magnetic field is equal to the pole pair number Pr of the rotor pole shoe, stable electromagnetic torque is output.
In order to satisfy the principle that the harmonic magnetic field drives the electric excitation motor, the following conditions must be met:
A. the number Pr of pole shoe magnetic poles of the rotor of the electric excitation motor driven by the harmonic magnetic field must satisfy the following conditions: z ± Pm = Pr, expressed specifically as follows:
(1) according to ampere-loop law: Σ hxl = wxl = F, where H-magnetic field strength, L-magnetic path length, W-coil turn number, I-coil current, F-magnetomotive force;
(2) in a motor magnetic field closed loop, a closed circuit is formed mainly through a ferromagnetic substance and a motor air gap, so that the motor ampere loop law is expressed as follows: h (δ) × L (δ) + H (ferromagnetic) × L (ferromagnetic) = W × I = F, since H (ferromagnetic) can be approximately equal to zero in a ferromagnetic substance which is very small, H (δ) × L (δ) = W × I = F;
(3) the relationship between the magnetic induction intensity B and the magnetic field intensity H is as follows: b = μ × H, where μ — relative permeability;
(4) f = WI = B (δ) × L (δ)/μ 0, where μ 0 — the relative air permeability;
(5) the machine air gap magnetic induction can be expressed as: b (δ) = F × μ 0/L (δ) = F × ʌ (δ), where ʌ (δ) -motor air gap permeance, the smaller the air gap, the larger the permeance;
(6) the magnetomotive force F is distributed in the air gap of the motor as a rectangular wave, and can be expressed as follows according to Fourier series:
F(α)=(2/π)×F×[sin(Pm×α)+(1/3)×sin(3×Pm×α)+ … +(1/n)×sin(n×Pm
x α), where n =1,2,3, α — represents a mechanical space angle along the air gap circumferential direction, it can be seen that the fundamental wave amplitude of the magnetomotive force is the largest, and the fundamental wave magnetomotive force expression is:
F1(α)=(2/π)×F×sin(Pm×α)=(2×WI/π)×sin(Pm×α)
(7) the motor air gap tooth magnetic conductance ʌ delta is approximately rectangular wave in spatial distribution, and can be expressed as follows according to Fourier series:
ʌ delta (alpha) = ʌ 0+ ʌ × cos (Z × alpha) + ʌ 2 × cos (2 × Z × alpha) + … + ʌ n × cos (n × Z × alpha), where n is
=1,2,3.. The fundamental flux-guide amplitude is the largest, and the expression is as follows: ʌ δ 1 (α) = ʌ + ʌ × cos (Z × α);
(8) the magnetic induction intensity expression of the stator winding fundamental wave magnetomotive force generated along the spatial distribution in the motor air gap under the modulation of the stator tooth magnetic conductance is as follows:
B(α)=F×ʌ(δ)=(2×WI/π)×sin(Pm×α)×[ʌ0+ʌ1×cos(Z×α)]
= Bm0 × sin (Ps × α) + Bm1 × sin (Pm × α) × cos (Z × α), in which,
bm0=2 × WI × ʌ/pi, bm1=2 × WI × ʌ/pi, using trigonometric formula theorem: sin (a) × cos (b) = [ sin (a + b) + sin (a-b) ]/2, varying the above equation yields:
b (α) = Bm0 × sin (Pm × α) + (Bm 1/2) × sin [ (Z + Pm) × α ] + (Bm 1/2) × sin [ (Z-Pm) × α ], as can be seen from the above equation, the fundamental magnetomotive force generated by energization of the stator phase windings can generate the following three magnetic fields in the motor air gap:
a fundamental wave magnetomotive field with the pole pair number of Pm, wherein the property of the field is equivalent to that of a field formed by a stator without a slot;
a tooth harmonic magnetic conduction magnetic field with the pole pair number of (Z + Pm), wherein the magnetic field property is equivalent to a magnetic field formed after fundamental wave magnetomotive force is modulated by a stator tooth slot;
c, a tooth harmonic magnetic conduction magnetic field with the pole pair number (Z-Pm), wherein the magnetic field property is equivalent to a magnetic field formed by modulating fundamental wave magnetomotive force by stator tooth slots;
(9) selecting the number Pr of pole shoe magnetic poles of a rotor of the harmonic magnetic field driven electric excitation motor:
according to the basic principle of motor operation, the motor can output stable electromagnetic torque only when the number of pole pairs of the pole shoes of the rotor is equal to the number of pole pairs formed by the stator coil;
according to the principle, the number Pr of pole shoe magnetic poles of the rotor of the harmonic magnetic field driven electric excitation motor must satisfy the following conditions:
z + Pm = Pr or Z-Pm = Pr.
B. The selection of the number Z of stator slots of the harmonic magnetic field driven electric excitation motor: z = m × k, specifically expressed as follows:
each wire is wrapped with 2 element edges, each stator slot is a double-layer winding, and 2 elements are placed on the upper layer or the lower layer or the left side and the right side, namely the element edges of two different wire wraps are placed in each stator slot.
Each phase of winding comprises k coils, the motor is divided into m phases, and the number Z of the stator slots of the motor needs to meet the following requirements: z = m × k, double layer winding is used.
C. The harmonic magnetic field drive motor has the relationship that the number k of each phase line package and each phase line package form the magnetic pole pair Pm:
k = n × Pm, wherein n =1,2,3 … is specifically expressed as follows:
as can be seen from the principle of electromagnetic field, 1 coil can only form 1 pair of polar magnetic fields, so the number k of the coils is more than or equal to the number Pm of the pole pairs of the magnetic poles of the coils. On the 360-degree mechanical space of the motor air gap circumference, the principle of air gap magnetic field amplitude symmetry is considered: the number of coils forming 1 antipode may be 1,2,3, …; the number of coils forming 2 pairs of poles may be 2, 4, 6, …; the number of coils forming 3 pairs of poles can be 3, 6, 9, …; the number of the coils forming the Pm antipode is as follows: k = n × Pm, where n =1,2,3 ….
According to the principle conditions, when a three-phase (m = 3) winding structure is adopted, the combination of the number of stator slots/the number of pairs of rotor magnetic steel poles/the number of packets of each phase of the harmonic magnetic field driving electric excitation motor is as follows:
Figure DEST_PATH_IMAGE002
the control mode of the harmonic magnetic field driven electric excitation motor is as follows: the method is suitable for a BLDC control mode and a PMSM control mode, wherein the BLDC is a square wave voltage (current) driving mode, and the PMSM is a sine wave voltage (current) driving mode.
The principle that the harmonic magnetic field drives the electric excitation motor to improve the power volume density is as follows:
a, basic evaluation indexes of the electrically excited motor: the motor is used as a rotary mechanical device, vibration noise is inevitably generated, and the cogging torque pulsation of the motor is an important source for causing the vibration noise of the motor, so that the cogging torque pulsation must be reduced at the same time when the motor pursues the power volume density (watt/liter) to be extremely consistent, the vibration noise of the motor is ensured to be in a reasonable range, and the improvement of the power volume density has practical significance;
B. the main means for improving the power volume density of the permanent magnet motor are as follows:
a. optimizing a magnetic circuit of the motor: the lifting effect is limited;
b. reducing the value of the air gap between the stator and the rotor of the motor: basically, the amplitude of the air gap magnetic field is inversely proportional to the air gap value, so the improvement effect is obvious;
C. the negative influence of the motor air gap value on the motor tooth socket torque pulsation is reduced: the cogging torque amplitude is in direct proportion to the square of the air gap magnetic field amplitude, so that the motor cogging torque pulsation is obviously increased by reducing the motor air gap value, and the vibration noise of the motor is also obviously increased;
D. the effective method for reducing the cogging torque pulsation amplitude of the motor comprises the following steps:
a. under the condition of maintaining a fixed motor air gap value, theoretical research shows that an effective method for reducing motor tooth space torque pulsation is to increase the number of motor tooth space torque fluctuation cycles (the number of the cycles of rotor rotation one-circle tooth space torque fluctuation), wherein the fluctuation cycles is equal to the minimum common multiple of the number of stator slots and the number of rotor poles;
b. the ratio of the fluctuation period number of the harmonic magnetic field driven electric excitation motor to the fluctuation period number of the traditional motor under the condition of the same number of stator slots is as follows:
Figure DEST_PATH_IMAGE004
from the comparison results in the above table, it can be seen that the harmonic magnetic field drives the electric excitation motor and the stator with the same number of slots
Compared with the traditional electric excitation motor, the tooth space moment fluctuation period number of the harmonic magnetic field driving electric excitation motor has obvious increasing trend.
Preferably, the left side face of the magnetic yoke, the right side face of the magnetic yoke, the upper end face of the magnetic yoke and the lower end face of the magnetic yoke which are arranged on the pole shoe are all subjected to insulation treatment, and the pole shoe and the excitation winding play an insulation role.
Preferably, the left side surface of the magnetic yoke, the right side surface of the magnetic yoke, the upper end surface of the magnetic yoke and the lower end surface of the magnetic yoke, which are arranged on the pole shoe, are respectively matched with the left side of the excitation winding, the right side of the excitation winding, the upper side of the excitation winding and the lower side of the excitation winding to perform radial and axial positioning of the excitation winding.
Preferably, the excitation winding can control the direction of the excitation current by setting a winding mode so as to realize that the magnetic poles of the 26 pole shoes are distributed in an N pole and an S pole alternating arrangement.
Preferably, the motor shaft of the stator assembly is provided with a positive conducting ring and a negative conducting ring, the rotor assembly is provided with a positive conducting plate and a negative conducting plate, and the positive pole and the negative pole of the power supply respectively supply power to the excitation winding through the positive conducting ring, the positive conducting plate, the negative conducting ring and the negative conducting plate.
Preferably, an insulating ring is arranged between the positive conducting ring and the motor shaft and between the negative conducting ring and the motor shaft, so that the insulating function is achieved.
Preferably, a motor shaft of the stator assembly is provided with a radial hole and an axial hole, and the wire harness penetrates through the radial hole and is led out from the axial hole to realize the leading-out of the wire harness.
Preferably, the stator assembly is provided with the elastic fixing clamp and the positioning column to position and fix the control module, so that the positioning precision of the control module can be improved, and the control module can be fixed more firmly and reliably.
The harmonic magnetic field driving electric excitation motor can be designed into an outer stator inner rotor structure according to different purposes, and the performance and the effect which are equivalent to those of the outer rotor inner rotor structure in the patent embodiment can be achieved.
Compared with the prior art, the invention has the advantages that: the harmonic magnetic field driving electric excitation motor greatly improves the tooth space moment fluctuation period number through the combination of the set stator slot number and the set rotor pole shoe magnetic pole number, can maintain or reduce the tooth space moment fluctuation amplitude of the harmonic magnetic field driving electric excitation motor while reducing the air gap value of the harmonic magnetic field driving electric excitation motor, enables the pole pair number of the harmonic magnetic field generated by the stator to be equal to the pole pair number of the rotor pole shoe through the set stator winding mode, forms stable electromagnetic torque output, can adopt a smaller harmonic magnetic field to drive the air gap of the electric excitation motor, greatly improves the air gap magnetic field strength, enables the output power of the harmonic magnetic field driving electric excitation motor to be improved in a positive proportion, and synchronously improves the power volume density of the harmonic magnetic field driving electric excitation motor in a positive proportion. Compared with the traditional motor, under the condition that the output power is the same, the volume of the harmonic magnetic field driving electric excitation motor is reduced by more than one time, which means that the weight of the harmonic magnetic field driving motor is also reduced by more than one time, the use cost of motor materials can be obviously saved, especially the cost of rare earth permanent magnet materials, and the competitive advantage of the product market is greatly promoted. The harmonic magnetic field driving electric excitation motor structure can be matched with traditional BLDC and PMSM motor control modules, and has strong universality in control.
Drawings
Fig. 1 is a perspective view of a harmonic magnetic field driven electric excitation motor according to an embodiment of the present invention.
Fig. 2 is an exploded view of a harmonic magnetic field driven electric excitation motor according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an electric excitation motor driven by a harmonic magnetic field according to an embodiment of the present invention.
Fig. 4base:Sub>A isbase:Sub>A partial view of the cross-sectionbase:Sub>A-base:Sub>A in fig. 3.
Fig. 4B is a partial view of the cross-sectional view B-B in fig. 3.
Fig. 5a is a partial enlarged view of F in fig. 4 a.
Fig. 5b is a partial enlarged view of P in fig. 4 b.
Fig. 6 is an exploded schematic view of a rotor assembly according to an embodiment of the present invention.
Fig. 7 is a partial enlarged view of W in fig. 6.
Fig. 8 is a perspective view of a field winding according to an embodiment of the present invention.
Fig. 9 is an exploded schematic view of a stator assembly according to an embodiment of the present invention.
Fig. 10 is a cross-sectional view of a motor shaft according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1 and 2, a harmonic magnetic field driven electric excitation motor includes a rotor assembly 1, a stator assembly 2, a control module 3, and a wire harness 4. When the harmonic magnetic field drives the electric excitation motor to work in an electrified mode, torque is output through rotation of the rotor assembly 1, and electric energy is converted into mechanical energy.
As shown in fig. 3 to 10, the rotor assembly 1 is composed of a casing 11, a rotor 12, an excitation winding 13, a positive conductive sheet 14, and a negative conductive sheet 15.
The rotor 12 is adhered to the inner circumferential surface of the housing 11 by an adhesive.
The rotor 12 is provided with 20 pole shoes (10 pairs of poles) uniformly on an inner circle.
The pole shoe 1201 is provided with a yoke left side 1202, a yoke right side 1203, a yoke upper end 1204 and a yoke lower end 1204 which are all insulated and insulated from the excitation winding 13.
The pole shoe 1201 is provided with a yoke left side 1202, a yoke right side 1203, a yoke upper end 1204 and a yoke lower end 1204 which are respectively matched with an excitation winding left side 1301, an excitation winding right side 1302, an excitation winding upper side 1303 and an excitation winding lower side 1304 of the excitation winding 13, so as to perform radial and axial positioning of the excitation winding 13.
The excitation winding 13 can control the direction of the excitation current by setting the winding mode to realize that the magnetic poles of the 20 pole shoes 1201 are alternately distributed according to the N pole and the S pole.
The motor shaft 211 of the stator assembly is provided with a positive conducting ring 29 and a negative conducting ring 2010, the rotor assembly is provided with a positive conducting plate 14 and a negative conducting plate 15, and the positive pole and the negative pole of the power supply respectively supply power to the excitation winding 13 through the positive conducting ring 29, the positive conducting plate 14, the negative conducting ring 2010 and the negative conducting plate 15.
An insulating ring 2011 is arranged between the positive conductive ring 29 and the negative conductive ring 2010 and the motor shaft 211, so as to play a role in insulation.
The stator 21 of the stator component 2 is uniformly provided with 15 tooth sockets on the outer circle, the number of pole pairs of each phase line is 5, and the number of phase lines is 5.
Each wire package has 2 component limits, and each stator slot design adopts double-deck winding, adopts upper and lower floor or left and right sides to place 2 component limits, and the stator slot number equals the solenoid total number.
The excircle of the stator component 2 and the pole shoe 1201 of the rotor component 1 form a harmonic magnetic field to drive the air gap L of the electric excitation motor.
The wire harness 4 is connected with the control module 3 by welding.
Stator module 2 sets up elasticity fixing clip 212 and reference column 213 and fixes control module 3, makes control module 3's fixed firm more reliable.
Radial holes 2111, 2113 and 2114 and an axial hole 2112 are arranged on the motor shaft 211 of the stator assembly 2 so as to facilitate the wiring harness 4 to pass through the radial holes 2111, 2113 and 2114 and the axial hole 2112, and the leading-out of the wiring harness 4 is realized.
The bearings 23 and 28 arranged on the stator assembly 2 are fixed in the casing 11 of the rotor assembly 1, and play a role in supporting and positioning the rotor assembly 1, and the harmonic magnetic field drives the rotor assembly to rotate in the circumferential direction when the electric excitation motor works in an electrified mode.
The stator assembly 2 is provided with stop rings 25 and 26 for fixing the bearings 23 and 28 respectively so as to realize axial limiting of the rotor assembly 1, and the arranged wear- resistant gaskets 24 and 27 play a role in reducing friction force.

Claims (9)

1. Harmonic magnetic field drive electric excitation motor, its characterized in that: the method comprises the following steps:
A. the stator is provided with a plurality of tooth grooves, and the number of the grooves is Z;
B. in a 360-degree mechanical space of the circumference of the stator, the stator winding is divided into m phases according to a set connection rule;
C. any phase winding of the stator component with the stator windings is electrified with direct current constant current, and the number of pole pairs of a formed phase winding magnetic field is Pm in a 360-degree mechanical space of the circumference of the stator;
D. the number of coils contained in each phase of stator winding is k = n × Pm (n =1,2,3 …), and double-layer windings are adopted;
E. the magnetic poles of the rotor pole shoes are sequentially arranged in the circumferential direction according to the sequence of N poles and S poles through the excitation winding, and the number of the formed magnetic pole pairs of the rotor pole shoes is Pr along the 360-degree mechanical space of the rotor circumference;
F. forming a motor air gap in a circumferential 360-degree mechanical space between the stator and the rotor;
the magnetic pole pair Pr of the pole shoes of the rotor must satisfy the following conditions: pr = Z ± Pm, wherein the number of stator slots Z: z = m × k.
2. The harmonic magnetic field driven electric motor according to claim 1, wherein: the number Z =15 of the stator slots, the number Pr =10 of the magnetic pole pairs of the rotor pole shoes, the number Pm =5 of the pole pairs of each phase line packet, and the number k =5 of each phase line packet.
3. The harmonic magnetic field driven electric excitation motor according to claim 1, wherein: and the left side surface of the magnetic yoke, the right side surface of the magnetic yoke, the upper end surface of the magnetic yoke and the lower end surface of the magnetic yoke which are arranged on the pole shoe of the electric excitation rotor are all subjected to insulation treatment, and the magnetic yoke and the excitation winding play an insulation role.
4. The harmonic magnetic field driven electric excitation motor according to claim 1, wherein: the left side surface of the magnetic yoke, the right side surface of the magnetic yoke, the upper end surface of the magnetic yoke and the lower end surface of the magnetic yoke, which are arranged on the pole shoe of the electric excitation rotor, are respectively matched with the left side of an excitation winding, the right side of the excitation winding, the upper side of the excitation winding and the lower side of the excitation winding to perform radial and axial positioning of the excitation winding.
5. The harmonic magnetic field driven electric motor according to claim 1, wherein: the direction of the exciting current is controlled by the exciting winding through setting a winding mode so as to realize that the magnetic poles of the 20 pole shoes are alternately arranged and distributed according to N poles and S poles.
6. The harmonic magnetic field driven electric excitation motor according to claim 5, wherein: the motor shaft of the stator assembly is provided with a positive conducting ring and a negative conducting ring, the rotor assembly is provided with a positive conducting strip and a negative conducting strip, and the positive pole and the negative pole of the power supply respectively supply power to the excitation winding through the positive conducting ring and the positive conducting strip and the negative conducting ring and the negative conducting strip.
7. The harmonic magnetic field driven electric motor according to claim 6, wherein: and insulating rings are arranged between the positive conducting ring and the motor shaft and between the negative conducting ring and the motor shaft.
8. The harmonic magnetic field driven electric excitation motor according to claim 1, wherein: a motor shaft of the stator assembly is provided with a radial hole and an axial hole, and a wire harness penetrates through the radial hole and is led out from the axial hole.
9. The harmonic magnetic field driven electric excitation motor according to claim 1, wherein: and the stator assembly is provided with an elastic fixing clamp and a positioning column for positioning and fixing the control module.
CN202210891279.1A 2022-07-27 2022-07-27 Harmonic magnetic field driven electric excitation motor Pending CN115483785A (en)

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PCT/CN2022/117670 WO2024021238A1 (en) 2022-07-27 2022-09-07 Harmonic magnetic field driven electrically excited motor

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CN211405627U (en) * 2019-12-17 2020-09-01 西安交通大学 Stator and rotor double-armature winding multiple electromagnetic torque single air gap reluctance motor structure
CN111509941B (en) * 2020-03-24 2021-05-25 江苏大学 Magnetic field modulation hybrid excitation motor and multi-working-wave design method thereof
CN114598082A (en) * 2022-03-05 2022-06-07 宁波恒帅股份有限公司 Harmonic magnetic field driving motor
CN217063429U (en) * 2022-03-05 2022-07-26 宁波恒帅股份有限公司 Harmonic magnetic field driving motor
CN114726119B (en) * 2022-03-16 2024-02-13 江苏大学 Single-winding double-excitation magnetic field modulation motor and collaborative excitation design method thereof

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