CN115189491A - Bilateral coreless permanent magnet synchronous linear motor - Google Patents
Bilateral coreless permanent magnet synchronous linear motor Download PDFInfo
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- CN115189491A CN115189491A CN202210750899.3A CN202210750899A CN115189491A CN 115189491 A CN115189491 A CN 115189491A CN 202210750899 A CN202210750899 A CN 202210750899A CN 115189491 A CN115189491 A CN 115189491A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
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Abstract
The invention provides a bilateral coreless permanent magnet synchronous linear motor which comprises two layers of magnetic pole arrays which are arranged in a staggered mode at intervals, wherein each magnetic pole array is composed of a first magnetic pole with an isosceles triangle cross section and a horizontally magnetized magnetic pole, a second magnetic pole with a right-angled triangle cross section and a obliquely magnetized magnetic pole, and a third magnetic pole with a rectangular cross section and a vertically magnetized magnetic pole, and the two adjacent magnetic poles are arranged in unequal widths. Therefore, the linear motor adopts a novel bilateral Halbach magnetic pole configuration, the width of a vertically magnetized main magnetic pole is changed on the premise of keeping a pole pitch unchanged by combining magnetic pole dislocation and unequal widths of magnetic poles, and the structure is favorable for improving the sine property of a gas-gap magnetic field waveform, has higher adjustability compared with the traditional Halbach configuration, and is favorable for achieving higher performance on the whole motor; and adopt this kind of novel bilateral Halbach magnetic pole configuration can also the further improvement output power of effectual promotion fundamental wave amplitude, reduce thrust simultaneously undulant, realize the output performance maximize under the same magnetic pole quantity.
Description
Technical Field
The invention belongs to the technical field of motors, and particularly relates to a bilateral coreless permanent magnet synchronous linear motor.
Background
The bilateral coreless permanent magnet synchronous linear motor has the characteristics of small thrust fluctuation due to mutual offset of normal forces and no tooth space force, is widely applied to high-precision machining and is an important drive in a photoetching machine. The two sides of the motor generate magnetic fields by fixed permanent magnets, the middle of the motor is provided with a rotor formed by an electrified coil, and the electrified coil moves under the action of stress in the magnetic fields. The larger the magnetic field intensity is, the larger the thrust generated by the rotor is; the better the sinusoid of the air gap field, the smaller the thrust ripple. The magnetic field generated by the fixed magnetic poles on the two sides has great influence on the output performance, and the magnetic pole array which is often applied to the double-side coreless permanent magnet synchronous linear motor is a Halbach (Halbach) magnetic pole array. Thrust fluctuation of the double-sided coreless permanent magnet synchronous linear motor is an important index, however, reduction of the thrust fluctuation is often accompanied by reduction of thrust density. Under the condition that the external size is determined, the air gap magnetic field generated by the traditional Halbach magnetic pole array is often poor in sine property and large in thrust fluctuation, and the output performance cannot reach the maximum under the condition of the same magnetic pole consumption.
Disclosure of Invention
Based on the above, the invention aims to provide a bilateral coreless permanent magnet synchronous linear motor with higher air gap flux density sine.
In order to achieve the purpose, the invention adopts the following technical scheme:
a bilateral coreless permanent magnet synchronous linear motor comprises a rotor and a stator, wherein the rotor comprises a coil winding and a winding connecting plate; the stator comprises an upper side magnetic pole array and a lower side magnetic pole array; the rotor is arranged between the upper side magnetic pole array and the lower side magnetic pole array in a sliding mode;
the upper side magnetic pole array is formed by sequentially splicing a plurality of upper side magnetic pole configuration units with closed magnetic circuits, and the trend directions of the magnetic circuits of two adjacent upper side magnetic pole configuration units are opposite; the upper side magnetic pole configuration unit comprises a first magnetic pole with an isosceles triangle-shaped cross section, two second magnetic poles with right-angle triangles of cross sections and two third magnetic poles with rectangular cross sections, wherein the waist side surface of the first magnetic pole is spliced with the bevel side surface of the second magnetic pole, and the right-angle side surface of the third magnetic pole is spliced with the right-angle side surface of the second magnetic pole;
in the same upside magnetic pole configuration unit, when the magnetization direction of the first magnetic pole is horizontal leftward magnetization, the magnetization direction of the second magnetic pole located in the left direction of the first magnetic pole is oblique rightward downward magnetization, the magnetization direction of the third magnetic pole located in the left direction of the first magnetic pole is vertical downward magnetization, the magnetization direction of the second magnetic pole located in the right direction of the first magnetic pole is oblique leftward upward magnetization, and the magnetization direction of the third magnetic pole located in the right direction of the first magnetic pole is vertical upward magnetization; when the magnetizing direction of the first magnetic pole is horizontal rightward magnetizing, the magnetizing direction of the second magnetic pole positioned in the left direction of the first magnetic pole is inclined rightward upward magnetizing, the magnetizing direction of the third magnetic pole positioned in the left direction of the first magnetic pole is vertical upward magnetizing, the magnetizing direction of the second magnetic pole positioned in the right direction of the first magnetic pole is inclined rightward downward magnetizing, and the magnetizing direction of the third magnetic pole positioned in the right direction of the first magnetic pole is vertical downward magnetizing; the width of the third magnetic pole with the magnetizing direction being vertical upward is larger than that of the third magnetic pole with the magnetizing direction being vertical downward;
the lower magnetic pole array is formed by sequentially splicing a plurality of lower magnetic pole configuration units with closed magnetic circuits, and the trend directions of the magnetic circuits of two adjacent lower magnetic pole configuration units are opposite; the lower side magnetic pole configuration unit comprises a fourth magnetic pole with an isosceles triangle cross section, two fifth magnetic poles with right-angle triangles cross section and two sixth magnetic poles with rectangular cross sections, the waist side surface of the fourth magnetic pole is spliced with the bevel side surface of the fifth magnetic pole, and the right-angle side surface of the sixth magnetic pole is spliced with the right-angle side surface of the fifth magnetic pole;
in the same lower magnetic pole configuration unit, when the magnetization direction of the fourth magnetic pole is horizontal leftward magnetization, the magnetization direction of the fifth magnetic pole located in the left direction of the fourth magnetic pole is obliquely leftward upward magnetization, the magnetization direction of the sixth magnetic pole located in the left direction of the fourth magnetic pole is vertically upward magnetization, the magnetization direction of the fifth magnetic pole located in the right direction of the fourth magnetic pole is obliquely leftward downward magnetization, and the magnetization direction of the sixth magnetic pole located in the right direction of the fourth magnetic pole is vertically downward magnetization; when the magnetization direction of the fourth magnetic pole is horizontal rightward magnetization, the magnetization direction of the fifth magnetic pole positioned in the left direction of the fourth magnetic pole is oblique rightward downward magnetization, the magnetization direction of the sixth magnetic pole positioned in the left direction of the fourth magnetic pole is vertical downward magnetization, the magnetization direction of the fifth magnetic pole positioned in the right direction of the fourth magnetic pole is oblique rightward upward magnetization, and the magnetization direction of the sixth magnetic pole positioned in the right direction of the fourth magnetic pole is vertical upward magnetization; the width of the sixth magnetic pole with the magnetizing direction being vertical downward is larger than that of the sixth magnetic pole with the magnetizing direction being vertical upward;
the central line of the third magnetic pole with the magnetizing direction being vertical downward and the central line of the sixth magnetic pole with the magnetizing direction being vertical downward are on the same straight line;
the central line of the third magnetic pole with the magnetizing direction being vertical upward and the central line of the sixth magnetic pole with the magnetizing direction being vertical upward are on the same straight line.
As a preferable scheme of the present invention, in two adjacent upper side magnetic pole configuration units, a third magnetic pole located on the right side of the previous magnetic pole configuration unit and a third magnetic pole located on the left side of the next magnetic pole configuration unit are the same magnetic pole; in two adjacent lower side magnetic pole configuration units, the sixth magnetic pole positioned on the right side of the former magnetic pole configuration unit and the sixth magnetic pole positioned on the left side of the latter magnetic pole configuration unit are the same magnetic pole.
As a preferable aspect of the present invention, the magnetizing direction of the second magnetic pole is parallel to the oblique side of the second magnetic pole; the magnetizing direction of the fourth magnetic pole is parallel to the inclined edge of the fourth magnetic pole.
As a preferable scheme of the present invention, an included angle formed by the magnetizing direction of the second magnetic pole and the magnetizing direction of the first magnetic pole is 45 degrees; and an included angle formed by the magnetizing direction of the fifth magnetic pole and the magnetizing direction of the fourth magnetic pole is 45 degrees.
As a preferable scheme of the present invention, the stator includes an upper back iron and a lower back iron which are arranged at an interval from top to bottom, two ends of the upper back iron and two ends of the lower back iron are respectively connected and fixed through end plates to form a cavity with an opening, the upper magnetic pole array is fixed on a lower surface of the upper back iron, and the lower magnetic pole array is fixed on an upper surface of the lower back iron.
As a preferable aspect of the present invention, a portion of the winding connecting plate protrudes from the opening of the cavity and forms a connecting portion for externally connecting an actuating member.
In a preferred embodiment of the present invention, a rubber pad is provided on an inner surface of the end plate to face the mover in the moving direction.
Compared with the prior art, the bilateral coreless permanent magnet synchronous linear motor provided by the embodiment of the invention has the following beneficial effects:
the bilateral coreless permanent magnet synchronous linear motor adopts a novel bilateral Halbach magnetic pole configuration, the magnetic pole dislocation and the magnetic pole unequal width are combined, the width of a vertically magnetized main magnetic pole is changed on the premise that the pole distance is not changed, the structure is favorable for improving the sine property of the air gap magnetic field waveform, and the bilateral coreless permanent magnet synchronous linear motor has higher adjustability compared with the traditional Halbach configuration and is beneficial to achieving higher performance on the whole motor; in addition, the novel bilateral Halbach magnetic pole configuration can effectively improve the amplitude of fundamental waves, further improve the output force, simultaneously reduce the fluctuation of thrust force and realize the maximization of the output performance under the same magnetic pole consumption; in addition, this novel bilateral Halbach magnetic pole configuration can also be applicable to double-deck rotating electrical machines.
Drawings
Fig. 1 is a schematic structural diagram of a bilateral coreless permanent magnet synchronous linear motor according to an embodiment of the present invention;
FIG. 2 is a front view of a dual sided coreless permanent magnet synchronous linear motor of an embodiment of the present invention;
FIG. 3 is a schematic structural view of a novel double-sided Halbach pole configuration;
FIG. 4 is a schematic structural view of a conventional Halbach pole configuration;
FIG. 5 is a comparison graph of air gap flux density waveforms when the conventional Halbach pole configuration and the novel bilateral Halbach pole configuration of the present embodiment are applied to a bilateral coreless permanent magnet synchronous linear motor, respectively;
FIG. 6 is a FFT comparison graph of the conventional Halbach magnetic pole configuration and the novel bilateral Halbach magnetic pole configuration of the present embodiment respectively applied to the bilateral coreless permanent magnet synchronous linear motor;
FIG. 7 is a comparison graph of the mean and ripple of the output force of a dual-sided ironless permanent magnet synchronous linear motor with the conventional Halbach pole configuration and the novel dual-sided Halbach pole configuration of the present embodiment respectively;
FIG. 8 is a schematic structural view of a heterogeneous Halbach pole configuration;
FIG. 9 is a comparison diagram of air gap flux density waveforms when a traditional Halbach magnetic pole configuration and a heterogeneous Halbach magnetic pole configuration are respectively applied to a bilateral coreless permanent magnet synchronous linear motor;
fig. 10 is an FFT comparison diagram of the conventional Halbach pole configuration and the heterogeneous Halbach pole configuration respectively applied to the double-sided coreless permanent magnet synchronous linear motor.
The mark in the figure is: a mover 1; a stator 2; an upper magnetic pole array 3; a lower magnetic pole array 4; an upper back iron 5; a lower back iron 6; an end plate 7; a coil winding 8; a winding connection plate 9; a rubber pad 10; a first magnetic pole 31; a second magnetic pole 32; a third magnetic pole 33; a fourth magnetic pole 41; a fifth magnetic pole 42; and a sixth magnetic pole 43.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 and fig. 2, a bilateral coreless permanent magnet synchronous linear motor according to an embodiment of the present invention includes a mover 1 and a stator 2.
The stator 2 comprises an upper side magnetic pole array 3 and a lower side magnetic pole array 4 which are arranged at intervals up and down; for the magnetic leakage that reduces magnetic pole array magnetic leakage side stator 2 is including being upper back iron 5 and lower back iron 6 of upper and lower interval arrangement, upper back iron 5's both ends with the both ends of back iron 6 are connected fixedly and are formed through end plate 7 respectively down and have the open-ended cavity, upside magnetic pole array 3 is fixed upper back iron 5's lower surface, downside magnetic pole array 4 is fixed back iron 6's upper surface down.
The rotor 1 comprises a coil winding 8 and a winding connecting plate 9, wherein the coil winding 8 is a three-phase winding and is sequentially wound on the winding connecting plate 9 along the length direction of the magnetic pole array; the rotor 1 is arranged between the upper magnetic pole array 3 and the lower magnetic pole array 4 in a sliding manner, and can move along the length of the magnetic pole array under the interaction of a magnetic field generated after the coil winding 8 is electrified and a magnetic field of the magnetic pole array; a portion of the winding web 9 protrudes from the opening of the cavity and forms a connection for external connection of an actuator. Further, a rubber pad 10 facing the moving direction of the mover 1 is provided on an inner side surface of the end plate 7 to buffer a collision force against the end plate 7 when the mover 1 moves to the limit position.
As shown in fig. 3, in this embodiment, the upper magnetic pole array 3 is formed by sequentially splicing a plurality of upper magnetic pole configuration units with closed magnetic circuits, and the magnetic circuit trend directions of two adjacent upper magnetic pole configuration units are opposite; the upper side magnetic pole configuration unit comprises a first magnetic pole 31 with an isosceles triangle cross section, two second magnetic poles 32 with a right-angle triangle cross section and two third magnetic poles 33 with a rectangular cross section, wherein the waist side surface of the first magnetic pole 31 is spliced with the bevel side surface of the second magnetic pole 32, and the right-angle side surface of the third magnetic pole 33 is spliced with the right-angle side surface of the second magnetic pole 32; in the upper magnetic pole configuration unit, when the magnetization direction of the first magnetic pole 31 is horizontal leftward magnetization, the magnetization direction of the second magnetic pole 32 located in the left direction of the first magnetic pole 31 is oblique rightward downward magnetization, the magnetization direction of the third magnetic pole 33 located in the left direction of the first magnetic pole 31 is vertical downward magnetization, the magnetization direction of the second magnetic pole 32 located in the right direction of the first magnetic pole 31 is oblique leftward upward magnetization, and the magnetization direction of the third magnetic pole 33 located in the right direction of the first magnetic pole 31 is vertical upward magnetization; when the magnetization direction of the first magnetic pole 31 is horizontal rightward magnetization, the magnetization direction of the second magnetic pole 32 located in the left direction of the first magnetic pole 31 is oblique rightward upward magnetization, the magnetization direction of the third magnetic pole 33 located in the left direction of the first magnetic pole 31 is vertical upward magnetization, the magnetization direction of the second magnetic pole 32 located in the right direction of the first magnetic pole 31 is oblique rightward downward magnetization, and the magnetization direction of the third magnetic pole 33 located in the right direction of the first magnetic pole 31 is vertical downward magnetization; wherein, the width of the third magnetic pole 33 with the magnetizing direction being vertical upward is larger than the width of the third magnetic pole 33 with the magnetizing direction being vertical downward. The lower magnetic pole array 4 is formed by sequentially splicing a plurality of lower magnetic pole configuration units with closed magnetic circuits, and the trend directions of the magnetic circuits of two adjacent lower magnetic pole configuration units are opposite; the lower magnetic pole configuration unit comprises a fourth magnetic pole 41 with an isosceles triangle cross section, two fifth magnetic poles 42 with a right-angle triangle cross section and two sixth magnetic poles 43 with a rectangular cross section, wherein the waist side surface of the fourth magnetic pole 41 is spliced with the bevel side surface of the fifth magnetic pole 42, and the right-angle side surface of the sixth magnetic pole 43 is spliced with the right-angle side surface of the fifth magnetic pole 42; in the same lower magnetic pole configuration unit, when the magnetization direction of the fourth magnetic pole 41 is horizontal leftward magnetization, the magnetization direction of the fifth magnetic pole 42 located in the left direction of the fourth magnetic pole 41 is oblique leftward upward magnetization, the magnetization direction of the sixth magnetic pole 43 located in the left direction of the fourth magnetic pole 41 is vertical upward magnetization, the magnetization direction of the fifth magnetic pole 42 located in the right direction of the fourth magnetic pole 41 is oblique leftward downward magnetization, and the magnetization direction of the sixth magnetic pole 43 located in the right direction of the fourth magnetic pole 41 is vertical downward magnetization; when the magnetization direction of the fourth magnetic pole 41 is horizontal rightward magnetization, the magnetization direction of the fifth magnetic pole 42 located in the left direction of the fourth magnetic pole 41 is oblique rightward downward magnetization, the magnetization direction of the sixth magnetic pole 43 located in the left direction of the fourth magnetic pole 41 is vertical downward magnetization, the magnetization direction of the fifth magnetic pole 42 located in the right direction of the fourth magnetic pole 41 is oblique rightward upward magnetization, and the magnetization direction of the sixth magnetic pole 43 located in the right direction of the fourth magnetic pole 41 is vertical upward magnetization; wherein, the width of the sixth magnetic pole 43 with the magnetizing direction being vertical downward is larger than the width of the sixth magnetic pole 43 with the magnetizing direction being vertical upward. The center line of the third magnetic pole 33 with the magnetizing direction being vertical downward and the center line of the sixth magnetic pole 43 with the magnetizing direction being vertical downward are on the same straight line; the center line of the third magnetic pole 33 whose magnetizing direction is vertical upward and the center line of the sixth magnetic pole 43 whose magnetizing direction is vertical upward are on the same straight line. It should be noted that, in two adjacent upper side magnetic pole configuration units, the third magnetic pole 33 located on the right side of the former magnetic pole configuration unit and the third magnetic pole 33 located on the left side of the latter magnetic pole configuration unit are the same magnetic pole; in two adjacent lower side magnetic pole configuration units, the sixth magnetic pole 43 positioned on the right side of the former magnetic pole configuration unit and the sixth magnetic pole 43 positioned on the left side of the latter magnetic pole configuration unit are the same magnetic pole.
For example, in order to make the magnetizing angle of the obliquely magnetized magnetic pole more match with the magnetic pole array, the magnetizing direction of the second magnetic pole 32 is parallel to the oblique side of the second magnetic pole 32; the magnetization direction of the fourth magnetic pole 41 is parallel to the oblique side of the fourth magnetic pole 41. Of course, in other embodiments, the angle formed between the magnetizing direction of the second magnetic pole 32 and the magnetizing direction of the first magnetic pole 31 is 45 degrees; an included angle formed between the magnetizing direction of the fifth magnetic pole 42 and the magnetizing direction of the fourth magnetic pole 41 is 45 degrees.
Therefore, the bilateral coreless permanent magnet synchronous linear motor provided by the embodiment of the invention has the technical key and advantages that: the embodiment of the invention adopts a novel bilateral Halbach magnetic pole configuration, the magnetic pole dislocation and the magnetic poles are combined with unequal widths, the width of the vertically magnetized main magnetic pole is changed on the premise of keeping the pole pitch unchanged, the structure is favorable for improving the sine of the air gap magnetic field waveform, and the structure has higher adjustability compared with the traditional Halbach configuration and is favorable for achieving higher performance on the whole motor; and this kind of novel bilateral Halbach magnetic pole configuration can also the further improvement output power of effectual promotion fundamental wave amplitude, reduces thrust fluctuation simultaneously, realizes the output performance maximize under the same magnetic pole quantity. In addition, this novel bilateral Halbach magnetic pole configuration can also be applicable to double-deck rotating electrical machines.
Next, to verify the advantages of the bilateral coreless permanent magnet synchronous linear motor according to the embodiment of the present invention, the following comparative simulation experiment is performed on the difference between the novel bilateral Halbach magnetic pole configuration and the conventional Halbach magnetic pole configuration (as shown in fig. 4):
and comparing the traditional Halbach magnetic pole configuration with the novel bilateral Halbach magnetic pole configuration of the embodiment under the condition of the same motor size by using electromagnetic finite element simulation software ANSYS Electronics Desktop, obtaining an axial distance distribution waveform in one period of the air gap magnetic field, and performing Fourier decomposition on the waveform. Figure 5 shows the air gap field waveforms for a dual-sided coreless permanent magnet synchronous linear motor for a conventional Halbach pole configuration and the novel dual-sided Halbach pole configuration of the present embodiment, respectively;
fig. 6 shows that the conventional Halbach magnetic pole configuration and the novel bilateral Halbach magnetic pole configuration of the present embodiment are respectively applied to FFT comparison of a bilateral coreless permanent magnet synchronous linear motor; fig. 7 shows the average and ripple comparison of the output force when the conventional Halbach pole configuration and the novel bilateral Halbach pole configuration of the present embodiment are applied to the bilateral coreless permanent magnet synchronous linear motor, respectively.
It can be seen from fig. 5 and 6 that the fundamental component of the air gap flux density of the bilateral linear motor of the conventional Halbach magnetic pole configuration accounts for 97.21% of the total harmonic component, and the fundamental component of the air gap flux density of the bilateral linear motor of the novel bilateral Halbach magnetic pole configuration accounts for 97.66% of the total harmonic component, which shows that the novel bilateral Halbach magnetic pole configuration is favorable for improving the sine property of the air gap magnetic field waveform, the fourier decomposition of the air gap magnetic field adopting the novel bilateral Halbach magnetic pole configuration has better fundamental assignment compared with the conventional Halbach, and the fundamental component accounts for a larger percentage of the total harmonic component, and has higher adjustability compared with the conventional Halbach magnetic pole configuration, and is favorable for achieving higher performance to the whole motor, and the novel bilateral Halbach magnetic pole configuration has more advantages.
As can be seen from fig. 6, on the premise of ensuring that the conditions except the magnetic pole configuration are all the same, the mean thrust value of the novel bilateral Halbach magnetic pole configuration of the embodiment is 49.7775N, and the thrust fluctuation is 3.49%. The mean thrust value of the conventional Halbach magnetic pole configuration is 47.8328N, and the thrust fluctuation is 16.98%. Therefore, the output fluctuation of the thrust mean value of the novel bilateral Halbach magnetic pole configuration of the embodiment in the traditional Halbach magnetic pole configuration under the same motor size is reduced by 79%, and the method has more advantages.
It should be further described that, in order to further verify the advantages of the double-sided Halbach magnetic pole configuration, electromagnetic finite element simulation software ANSYS Electronics Desktop is used, under the condition of the same motor size, for the conventional Halbach magnetic pole configuration and the conventional Halbach magnetic pole configuration with the magnetic pole units dislocated (as shown in fig. 8, hereinafter referred to as an isomeric Halbach), an axial distance distribution waveform in one period of the air-gap magnetic field is obtained, and fourier decomposition is performed on the waveform. FIG. 9 illustrates the air gap field waveforms of a conventional Halbach pole configuration and a heterogeneous Halbach pole configuration respectively applied to a dual-sided ironless permanent magnet synchronous linear motor; fig. 10 shows the FFT comparison of the conventional Halbach pole configuration and the heterogeneous Halbach pole configuration respectively applied to the double-sided coreless permanent magnet synchronous linear motor.
As can be seen from fig. 9 and 10, when the air gap flux density of the linear motor of the conventional Halbach magnetic pole configuration is subjected to harmonic analysis, the fundamental component accounts for 97.21% of the total harmonic component. The fundamental component of the air gap flux density of the linear motor of the heterogeneous Halbach magnetic pole array accounts for 99.5 percent of the total harmonic component. It is explained that although the heterogeneous Halbach magnetic pole configuration is beneficial to improving the sine of the air gap magnetic field waveform, the configuration can reduce partial fundamental wave amplitude and further influence output force. From this, the novel bilateral Halbach magnetic pole configuration that adopts among the bilateral no iron core permanent magnet synchronous linear electric motor of this embodiment has more the advantage.
It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are used only to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
The foregoing is directed to the preferred embodiment of the present invention, and it is understood that various changes and modifications may be made by one skilled in the art without departing from the spirit of the invention, and it is intended that such changes and modifications be considered as within the scope of the invention.
Claims (10)
1. A bilateral coreless permanent magnet synchronous linear motor comprises a rotor and a stator, wherein the rotor comprises a coil winding and a winding connecting plate; the stator comprises an upper side magnetic pole array and a lower side magnetic pole array; the rotor is arranged between the upper side magnetic pole array and the lower side magnetic pole array in a sliding mode; the method is characterized in that:
the upper magnetic pole array is formed by sequentially splicing a plurality of upper magnetic pole configuration units with closed magnetic circuits, and the trend directions of the magnetic circuits of two adjacent upper magnetic pole configuration units are opposite; the upper side magnetic pole configuration unit comprises a first magnetic pole with an isosceles triangle-shaped cross section, two second magnetic poles with right-angle triangles of cross sections and two third magnetic poles with rectangular cross sections, wherein the waist side surface of the first magnetic pole is spliced with the bevel side surface of the second magnetic pole, and the right-angle side surface of the third magnetic pole is spliced with the right-angle side surface of the second magnetic pole;
in the same upside magnetic pole configuration unit, when the magnetization direction of the first magnetic pole is horizontal leftward magnetization, the magnetization direction of the second magnetic pole located in the left direction of the first magnetic pole is oblique rightward downward magnetization, the magnetization direction of the third magnetic pole located in the left direction of the first magnetic pole is vertical downward magnetization, the magnetization direction of the second magnetic pole located in the right direction of the first magnetic pole is oblique leftward upward magnetization, and the magnetization direction of the third magnetic pole located in the right direction of the first magnetic pole is vertical upward magnetization; when the magnetizing direction of the first magnetic pole is horizontal rightward magnetization, the magnetizing direction of the second magnetic pole positioned in the left direction of the first magnetic pole is oblique rightward upward magnetization, the magnetizing direction of the third magnetic pole positioned in the left direction of the first magnetic pole is vertical upward magnetization, the magnetizing direction of the second magnetic pole positioned in the right direction of the first magnetic pole is oblique rightward downward magnetization, and the magnetizing direction of the third magnetic pole positioned in the right direction of the first magnetic pole is vertical downward magnetization; the width of the third magnetic pole with the magnetizing direction being vertical upwards is larger than that of the third magnetic pole with the magnetizing direction being vertical downwards;
the lower magnetic pole array is formed by sequentially splicing a plurality of lower magnetic pole configuration units with closed magnetic circuits, and the trend directions of the magnetic circuits of two adjacent lower magnetic pole configuration units are opposite; the lower side magnetic pole configuration unit comprises a fourth magnetic pole with an isosceles triangle cross section, two fifth magnetic poles with right-angled triangle cross sections and two sixth magnetic poles with rectangular cross sections, wherein the waist side surface of the fourth magnetic pole is spliced with the bevel side surface of the fifth magnetic pole, and the right-angled side surface of the sixth magnetic pole is spliced with the right-angled side surface of the fifth magnetic pole;
in the same lower magnetic pole configuration unit, when the magnetization direction of the fourth magnetic pole is horizontal leftward magnetization, the magnetization direction of the fifth magnetic pole located in the left direction of the fourth magnetic pole is obliquely leftward upward magnetization, the magnetization direction of the sixth magnetic pole located in the left direction of the fourth magnetic pole is vertically upward magnetization, the magnetization direction of the fifth magnetic pole located in the right direction of the fourth magnetic pole is obliquely leftward downward magnetization, and the magnetization direction of the sixth magnetic pole located in the right direction of the fourth magnetic pole is vertically downward magnetization; when the fourth magnetic pole is magnetized horizontally to the right, the fifth magnetic pole positioned in the left direction of the fourth magnetic pole is magnetized obliquely downwards to the right, the sixth magnetic pole positioned in the left direction of the fourth magnetic pole is magnetized vertically downwards, the fifth magnetic pole positioned in the right direction of the fourth magnetic pole is magnetized obliquely upwards to the right, and the sixth magnetic pole positioned in the right direction of the fourth magnetic pole is magnetized vertically upwards; the width of the sixth magnetic pole with the magnetizing direction being vertical downward is larger than that of the sixth magnetic pole with the magnetizing direction being vertical upward;
the center line of the third magnetic pole with the magnetizing direction being vertical downward and the center line of the sixth magnetic pole with the magnetizing direction being vertical downward are on the same straight line;
the central line of the third magnetic pole with the magnetizing direction being vertical upward and the central line of the sixth magnetic pole with the magnetizing direction being vertical upward are on the same straight line.
2. The bilateral coreless permanent magnet synchronous linear motor of claim 1, wherein in two adjacent upper side magnetic pole configuration units, a third magnetic pole on a right side of a previous magnetic pole configuration unit and a third magnetic pole on a left side of a next magnetic pole configuration unit are the same magnetic pole.
3. The bilateral coreless permanent magnet synchronous linear motor of claim 1, wherein in two adjacent lower pole configuration units, a sixth pole on a right side of a previous pole configuration unit is the same as a sixth pole on a left side of a subsequent pole configuration unit.
4. The bilateral coreless permanent magnet synchronous linear motor of claim 1, wherein the direction of magnetization of the second pole is parallel to a hypotenuse of the second pole.
5. The double-sided ironless permanent magnet synchronous linear electric machine according to claim 1, characterized in that the magnetization direction of the fourth magnetic pole is parallel to the hypotenuse of the fourth magnetic pole.
6. The bilateral coreless permanent magnet synchronous linear motor of claim 1, wherein an angle formed between a direction of magnetization of the second magnetic pole and a direction of magnetization of the first magnetic pole is 45 degrees.
7. The bilateral coreless permanent magnet synchronous linear motor of claim 1, wherein an angle formed between a direction of magnetization of the fifth magnetic pole and a direction of magnetization of the fourth magnetic pole is 45 degrees.
8. The bilateral coreless permanent magnet synchronous linear motor according to any one of claims 1 to 7, wherein the stator includes upper back iron and lower back iron arranged at an interval from top to bottom, two ends of the upper back iron and two ends of the lower back iron are respectively connected and fixed through end plates and form a cavity with an opening, the upper side magnetic pole array is fixed on a lower surface of the upper back iron, and the lower side magnetic pole array is fixed on an upper surface of the lower back iron.
9. A double-sided ironless permanent-magnet synchronous linear motor according to claim 8, characterized in that portions of said winding webs protrude from openings of said cavities and form connections for external execution of components.
10. The bilateral coreless permanent magnet synchronous linear motor of claim 9, wherein an inner side of the end plate is provided with a rubber pad opposite to a moving direction of the mover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| US20040021374A1 (en) * | 2002-05-24 | 2004-02-05 | Kang Do Hyun | Horizontal and vertical transportation system using permanent magnet excited transverse flux linear motors |
| CN103178687A (en) * | 2011-12-26 | 2013-06-26 | 上海磁浮交通发展有限公司 | Bilateral mixed excitation type high-thrust linear synchronous motor |
| CN104242596A (en) * | 2014-09-11 | 2014-12-24 | 浙江大学 | Asymmetric double-side type permanent magnet straight line synchronous motor |
| CN209088784U (en) * | 2018-11-27 | 2019-07-09 | 西安工业大学 | A kind of ironless linear motors |
| CN112953158A (en) * | 2021-01-11 | 2021-06-11 | 南京航空航天大学 | Bilateral permanent magnet staggered modular continuous pole permanent magnet synchronous linear motor |
| CN113612365A (en) * | 2021-09-08 | 2021-11-05 | 北京航空航天大学 | Halbach-like magnetic pole array structure body for linear motor |
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- 2022-06-29 CN CN202210750899.3A patent/CN115189491A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040021374A1 (en) * | 2002-05-24 | 2004-02-05 | Kang Do Hyun | Horizontal and vertical transportation system using permanent magnet excited transverse flux linear motors |
| CN103178687A (en) * | 2011-12-26 | 2013-06-26 | 上海磁浮交通发展有限公司 | Bilateral mixed excitation type high-thrust linear synchronous motor |
| CN104242596A (en) * | 2014-09-11 | 2014-12-24 | 浙江大学 | Asymmetric double-side type permanent magnet straight line synchronous motor |
| CN209088784U (en) * | 2018-11-27 | 2019-07-09 | 西安工业大学 | A kind of ironless linear motors |
| CN112953158A (en) * | 2021-01-11 | 2021-06-11 | 南京航空航天大学 | Bilateral permanent magnet staggered modular continuous pole permanent magnet synchronous linear motor |
| CN113612365A (en) * | 2021-09-08 | 2021-11-05 | 北京航空航天大学 | Halbach-like magnetic pole array structure body for linear motor |
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