CN113794292A - Single-phase rotary proportional solenoid - Google Patents
Single-phase rotary proportional solenoid Download PDFInfo
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- CN113794292A CN113794292A CN202110996818.3A CN202110996818A CN113794292A CN 113794292 A CN113794292 A CN 113794292A CN 202110996818 A CN202110996818 A CN 202110996818A CN 113794292 A CN113794292 A CN 113794292A
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- 239000007769 metal material Substances 0.000 claims description 3
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- 238000002955 isolation Methods 0.000 abstract 2
- 230000005284 excitation Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 5
- 238000005457 optimization Methods 0.000 description 4
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- 230000005540 biological transmission Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/17—Stator cores with permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
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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
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- 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
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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
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Abstract
单相旋转式比例电磁铁，包括定子，定子的前后侧分别装有前端盖和后端盖，定子内安装有转子，转子上装有输出轴，输出轴连接复位扭簧，所述定子由同轴排列的第一定子、第二定子、第三定子和第四定子组成；转子沿周向均匀分布有N个转子齿，转子齿形成转子磁面，每个转子磁面与定子磁面形成工作气隙；第二定子和第三定子之间沿交界面开有对称的凹槽，相互反扣拼合形成环形槽，环形槽放置隔磁环，隔磁环上缠有控制线圈，形成控制磁通；第一定子和第二定子之间、第三定子和第四定子之间分别放置有第一永磁体与第二永磁体，形成极化磁通。本发明可以获得接近水平的矩角特性曲线，外加复位扭簧后就可以获得比例的位置控制特性。
The single-phase rotary proportional electromagnet includes a stator. The front and rear sides of the stator are respectively equipped with a front end cover and a rear end cover. A rotor is installed in the stator, an output shaft is installed on the rotor, and the output shaft is connected with a reset torsion spring. The first stator, the second stator, the third stator and the fourth stator are arranged; the rotor has N rotor teeth evenly distributed along the circumferential direction, the rotor teeth form the rotor magnetic surface, and each rotor magnetic surface and the stator magnetic surface form a work Air gap; symmetrical grooves are opened along the interface between the second stator and the third stator, which are reversed and spliced to form an annular groove. The annular groove is placed with a magnetic isolation ring, and a control coil is wound on the magnetic isolation ring to form a control magnetic flux. ; A first permanent magnet and a second permanent magnet are placed between the first stator and the second stator, and between the third stator and the fourth stator, respectively, to form a polarized magnetic flux. The present invention can obtain a near-horizontal moment-angle characteristic curve, and after adding a return torsion spring, a proportional position control characteristic can be obtained.
Description
Technical Field
The invention relates to an electro-mechanical converter for an electro-hydraulic digital valve in the field of fluid transmission and control, in particular to a single-phase rotary proportional electromagnet.
Background
The rotary valve is a reversing valve which changes the relative position of a valve core and a valve sleeve by utilizing rotary motion to change a flow path in the rotary valve and finally realizes the opening and closing or reversing of the flow path. The rotary valve can be driven manually, mechanically or directly by an electric motor, a motor and a rotary electromagnet to achieve precise servo/proportional control. Compared with a slide valve or a cone valve, the rotary valve has the advantages of high reliability, simple structure, high working frequency, strong oil pollution resistance and the like, can be widely applied to hydraulic systems of high-speed switching, high-speed excitation and high-speed reversing, and can obtain rated flow which is larger than that of a multi-stage slide valve by a single-stage rotary valve particularly when the number of throttling grooves of a valve core and a valve sleeve is large. However, in the prior electro-hydraulic servo/proportional control system, the rotary valve is far less widely used than the slide valve. The reason is that firstly, the throttling groove/window of the rotary valve is complex to process, secondly, the rotary electromagnet for driving the rotary valve is more difficult to obtain the proportion control characteristic than the direct-acting type proportion electromagnet, the latter adopts a magnetism isolating ring structure, a magnetic circuit is divided into two paths of axial and radial at the magnetism isolating ring during excitation, the horizontal stroke-thrust characteristic required by the proportion control can be obtained after synthesis, although the welding of a magnetism conducting sleeve is more complicated, the problem is not big for large-scale automatic production, and the rotary electromagnet always needs to carry out special optimization design on the shapes of stator teeth and rotor teeth to obtain the flatter moment-corner characteristic, thereby greatly limiting the practical application of the rotary electromagnet.
In order to popularize and apply the rotary valve in an electro-hydraulic servo/proportional system, people make a great deal of research on the optimization of the magnetic circuit topological structure and the moment angle characteristic of the rotary electromagnet. The torque motor is widely applied to nozzle flapper valves and jet pipe servo valves, proportional position control characteristics can be obtained through reasonable design of an elastic element, but a large working angle is difficult to obtain due to the fact that a magnetic circuit of the torque motor is based on an axial air gap. The improved torque motor based on the radial working air gap, which is proposed by Montagu of the American general detection company, has the advantages that the working rotation angle range is further expanded, and the torque motor has positive electromagnetic rigidity, so that the proportional position control characteristic can be obtained without adding an elastic element. To obtain a flat torque angle characteristic curve, Fumio of Hitachi designs the permanent magnet shape of the rotor of the moving magnet torque motor, and cuts grooves along the radial direction on the pole surface and fills non-magnetic conductive material, so as to compensate the torque pulsation accompanied by the rotation of the rotor. In the permanent magnet torque motor designed by the shin-tou-shui-lang of the company denso, two magnetic surfaces formed by discrete permanent magnets are asymmetrically arranged on the outer side of a rotating shaft in a way of half magnetic surface angle difference, so that torque pulsation caused by the periphery of a polygonal magnetic surface is compensated, and a stable torque-rotating angle characteristic is obtained. Zhejiang university is trembled et al and provides a moving-magnet type rotary proportional electromagnet based on a radial working air gap, which is based on a differential magnetic circuit and has positive electromagnetic rigidity, but the structure is more complex, and the moving-magnet type rotary proportional electromagnet is not beneficial to industrial application and large-scale batch production.
Disclosure of Invention
In order to overcome the defects that the existing rotary electromagnet is difficult to obtain the horizontal moment-corner characteristic, complicated in structure, not beneficial to industrialization, application and large-scale batch production, the invention provides the single-phase rotary proportional electromagnet with the horizontal moment-corner characteristic and simple in structure.
The basic principle of the invention is that the output torque of a general rotary electromechanical converter is reduced along with the rotation of the rotor (the stator and the rotor are gradually aligned) in the working process, namely the slope of the torque angle characteristic curve is negative. Therefore, the invention designs the shape of the stator tooth into the pointed stator tooth, and controls the magnetic saturation degree of the tooth point by changing the shape of the tooth point of the stator tooth, so that the lateral magnetic flux generated by the tooth side of the rotor and driving the rotor to rotate keeps unchanged along with the rotation of the rotor. A moment angle characteristic curve close to the horizontal can be obtained through reasonable parameter optimization, and the position control characteristic of the proportion can be obtained after a reset torsion spring is additionally arranged.
The technical scheme adopted by the invention is as follows: the single-phase rotary proportional electromagnet comprises a stator, wherein a front end cover and a rear end cover are respectively arranged on the front side and the rear side of the stator, a rotor is arranged in the stator, an output shaft is arranged on the rotor, the output shaft is connected with a reset torsion spring, and the axial leads of the stator, the rotor and the output shaft are collinear; the stator consists of a first stator, a second stator, a third stator and a fourth stator which are coaxially arranged, N pointed stator teeth are uniformly distributed on the circumference of each stator ring, and the tooth tips of the stator teeth extend clockwise or anticlockwise towards the circumference of the stator; the first stator and the fourth stator are the same in shape, the second stator and the third stator are the same in shape, and stator teeth form a stator magnetic surface;
the stator teeth of the first stator and the second stator are axially aligned, and the stator teeth of the third stator and the fourth stator are axially aligned; symmetrical grooves are formed between the second stator and the third stator along the interface, the grooves are mutually reversely buckled and spliced to form an annular groove, a magnetism isolating ring is placed in the annular groove, and a control coil is wound on the magnetism isolating ring to form control magnetic flux; a first permanent magnet and a second permanent magnet are respectively arranged between the first stator and the second stator and between the third stator and the fourth stator to form polarized magnetic flux;
n rotor teeth are uniformly distributed on the rotor along the circumferential direction, the rotor teeth form rotor magnetic surfaces, and each rotor magnetic surface and the stator magnetic surface form a working air gap;
the tooth tips of the first stator and the second stator are in the same direction and are clockwise; the tooth tips of the third stator and the fourth stator are in the same direction and are all anticlockwise; the stator teeth of the first stator and the second stator are behind the rotor teeth by an angle clockwise, and the stator teeth of the third stator and the fourth stator are ahead of the rotor teeth by the same angle clockwise.
Preferably, the reset torsion spring comprises a spring, a coupler and a spring cover plate, the spring cover plate is connected with the front end cover, the spring is installed on the spring cover plate, the coupler is installed on the spring, and the rear end of the output shaft is fixedly connected in a central hole of the coupler; the output shaft is fixedly connected to the rotor.
Preferably, 12 stator magnetic surfaces are uniformly distributed on the circumference of the first stator, the second stator, the third stator and the fourth stator, each stator magnetic surface is separated by 30 degrees, 12 rotor magnetic surfaces are uniformly distributed on the rotor along the circumference, and each rotor magnetic surface is separated by 30 degrees;
preferably, the rotor teeth of the first and second stators lag rotor teeth 1/4 in a clockwise direction and the third and fourth stators lead rotor teeth 1/4 in a tooth pitch angle.
Preferably, the rotor is of a hollow cup structure, the front end cover, the magnetism isolating ring, the rear end cover and the output shaft are made of non-magnetic metal materials, and the rotor, the first stator, the second stator, the third stator and the fourth stator are made of high-magnetic-permeability metal soft magnetic materials.
The invention has the beneficial effects that:
(1) the special stator tooth shape is adopted, and the stator tooth is designed into a sharp tooth shape. The invention controls the magnetic saturation degree at the tooth tip by designing the shape of the stator tooth, can obtain a nearly horizontal moment angle characteristic curve through reasonable parameter optimization, and can obtain the proportional position control characteristic after adding the reset torsion spring.
(2) An axial magnetic circuit symmetrical structure is adopted. Compared with an asymmetric axial magnetic circuit structure, the pitch angle characteristic of the proportional electromagnet keeps symmetrical no matter clockwise or anticlockwise rotation, and the working precision of the proportional electromagnet is guaranteed.
(3) The response speed is fast, and the output torque is large. Compared with other cylindrical structures of rotary proportional electromagnet rotors, the rotor of the rotary proportional electromagnet rotor provided by the invention is of a hollow cup structure, is small in rotational inertia, and is beneficial to obtaining higher dynamic response speed. And the design of a multi-magnetic-surface structure is adopted, so that the output torque is favorably improved.
(4) And single coil excitation is adopted, so that the control is simple. Compared with a double-phase excitation structure, the single coil can effectively reduce the complexity of a driving circuit and is simpler to control.
(5) Simple structure and low cost. Compared with other rotary proportional electromagnets, the rotary proportional electromagnet has the advantages of small number of parts, easiness in processing and assembling, low manufacturing cost and contribution to industrial practical application and large-scale batch production.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is an assembly schematic of the present invention;
FIG. 3 is a schematic view of a rotor structure of the present invention;
FIG. 4 is a schematic structural view of the return torsion spring of the present invention;
FIG. 5 is a schematic view of the front end cap construction of the present invention;
FIG. 6 is a schematic structural view of a rotor of the present invention;
FIG. 7 is a schematic view of a first stator structure of the present invention;
FIG. 8 is a schematic view of the structure of the magnetism isolating ring of the present invention;
FIG. 9 is a schematic view of a second stator configuration of the present invention;
FIG. 10 is a schematic view of the construction of the rear end cap of the present invention;
FIG. 11a is a schematic view of the assembly of a first stator and rotor of the present invention;
FIG. 11b is a schematic view of the assembly of a third stator and rotor of the present invention;
FIG. 12a is a schematic view of the operating principle of the present invention with the control coil not energized;
FIG. 12b is an enlarged view of the magnetic circuit at the first stator-to-rotor air gap;
FIG. 12c is an enlarged view of the magnetic circuit at the second stator-to-rotor air gap;
FIG. 12d is an enlarged view of the magnetic circuit at the air gap of the third stator and rotor;
fig. 12e is an enlarged view of the magnetic circuit at the air gap of the fourth stator and rotor;
FIG. 13 is a schematic diagram of the operating principle of the present invention, controlling the forward current to the coil;
fig. 14 is a schematic diagram of the working principle of the present invention, and the control coil is electrified with reverse current.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. 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.
In the description of the present invention, it should be noted that the orientations or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1-14, the front and rear sides of a stator of the single-phase rotary proportional electromagnet are respectively provided with a front end cover 3 and a rear end cover 12, a rotor 4 is arranged in the stator, an output shaft 1 is arranged on the rotor 4, and the output shaft 1 is connected with a reset torsion spring 2.
The stator of the invention is composed of a first stator 5, a second stator 8, a third stator 9 and a fourth stator 11 which are coaxially arranged, 12 pointed stator teeth are uniformly distributed on the circumference of each stator ring, the tooth tips of the stator teeth extend clockwise or anticlockwise towards the circumference of the stator, the stator teeth form stator magnetic surfaces 14, the magnetic surfaces 14 of all the stators have the same shape, and each stator magnetic surface 14 is separated by 30 degrees. The first stator 5 and the fourth stator 11 are identical in shape, and the second stator 8 and the third stator 9 are identical in shape. The stator teeth of the first stator 5 and the second stator 8 are axially aligned, and the stator teeth of the third stator 9 and the fourth stator 11 are axially aligned, which is beneficial to increasing the output torque. Symmetrical grooves are formed between the stator 8 and the stator 9 along the interface, the annular grooves 81 are formed by splicing, the magnetism isolating ring 7 is placed in the annular grooves, and a control coil is wound on the magnetism isolating ring 7 to form control magnetic flux. First permanent magnets 6 and second permanent magnets 10 are respectively arranged between the first stator 5 and the second stator 8 and between the third stator 9 and the fourth stator 11, so that polarized magnetic fluxes are formed.
The rotor 4 is uniformly distributed with 12 rotor teeth 41 along the circumferential direction, the rotor teeth form rotor magnetic surfaces 42, and each rotor magnetic surface and the stator magnetic surface form a working air gap. In order to enable the electromagnet to rotate in two directions, the axial arrangement mode and the staggered tooth mode of the stator need to be changed. The placing mode is as follows: the teeth tips of the first stator 5 and the second stator 8 are in the same direction, and are clockwise as shown in fig. 11 a; the teeth tips of the third stator 9 and the fourth stator 11 are oriented in the same direction, and are counterclockwise as viewed in fig. 11 b. The staggered teeth are shown in fig. 11 a-11 b, the stator teeth of the first stator and the second stator lag behind the rotor teeth 1/4, and the stator teeth of the third stator and the fourth stator lead the rotor teeth 1/4. The front end cover 3, the rear end cover 12 and the output shaft 1 are made of non-magnetic metal materials, and the rotor 1, the first stator 5, the second stator 8, the third stator 9 and the fourth stator 11 are made of high-magnetic-permeability metal soft magnetic materials.
The rotor adopts the hollow cup structure, reduces inertia, is favorable to increasing response speed.
The reset torsion spring 2 comprises a spring 21, a coupler 22 and a spring cover plate 23, the spring cover plate 23 is connected with the front end cover 3, the spring 21 is installed on the spring cover plate 23, the coupler 22 is installed on the spring 21, the rear end of the output shaft 1 is fixedly connected in a central hole of the coupler 22, and the output shaft 1 is fixedly connected on the rotor 4. After the rotary torque motor rotates clockwise and anticlockwise, the torque motor does not have the characteristic of negative spring stiffness, and the return torsion spring 2 needs to be additionally arranged to enable the rotor to return to the middle position.
When the control coil is not energized, only the polarized magnetic fluxes generated by the permanent magnets 6 and 10 in the air gap are the same, the position relation of the rotor 4 and each stator is the same, and the rotor 4 is at the initial position of the middle position, as shown in fig. 12 a.
FIGS. 12b to 12e show the working air gaps δ formed by the magnetic surfaces of the first stator 5, the second stator 8, the third stator 9 and the fourth stator 11 and the magnetic surfaces of the rotor teeth of the rotor 4 respectively1、δ2、δ3And delta4The magnetic circuit is enlarged, and the magnetic flux mainly comprises forward magnetic flux perpendicular to the magnetic surfaces of the stator teeth and the rotor teeth and lateral magnetic flux between the magnetic surfaces of the stator teeth and the side edges of the rotor teeth.
When the control coil 13 is energized with a forward current as shown in fig. 13, the working air gap δ1And working air gap delta4The flux is not influenced by the excitation field of the control coil, and the air gap flux remains unchanged. Working air gap delta2The control magnetic flux generated by the control coil and the polarized magnetic flux generated by the permanent magnet 6 are overlapped in the same direction, and the air gap magnetic flux is increased; working air gap delta3The control magnetic flux generated by the control coil and the polarized magnetic flux generated by the permanent magnet 10 are opposite in direction and mutually offset, the air gap magnetic flux is reduced, and the rotor 4 rotates anticlockwise under the action of electromagnetic torque. With the rotation of the rotor, the area of the magnetic surface of the rotor teeth opposite to the magnetic surface of the stator teeth is increased, namely the rotor teeth are gradually aligned with the stator teeth, and the positive magnetic flux is increased; however, due to the special shape of the stator teeth, the magnetic saturation condition at the teeth tips of the stator teeth is gradually improved along with the increase of the facing area of the magnetic surface, the total magnetic flux is increased, finally, the lateral magnetic flux driving the rotor to move is kept unchanged, the electromagnet obtains a nearly horizontal moment angle characteristic, the magnitude of the output moment can be adjusted by controlling the magnitude of the current, and a position control effect proportional to the current can be obtained when the electromagnet is matched with a linear spring for use.
When the control coil 13 is energized with a reverse current as shown in fig. 14, the working air gap δ1And working air gap delta4The flux is not influenced by the excitation field of the control coil, and the air gap flux remains unchanged. Working air gap delta2The control magnetic flux generated by the control coil and the polarized magnetic flux generated by the permanent magnet 6 are opposite in direction and mutually offset, and the air gap magnetic flux is reduced; working air gap delta3The control magnetic flux generated by the control coil and the polarized magnetic flux generated by the permanent magnet 10The magnetic fluxes of the air gaps are increased and the rotor 4 rotates clockwise under the action of electromagnetic torque. With the rotation of the rotor, the area of the magnetic surface of the rotor teeth opposite to the magnetic surface of the stator teeth is increased, namely the rotor teeth are gradually aligned with the stator teeth, and the positive magnetic flux is increased; however, due to the special shape of the stator teeth, the magnetic saturation condition at the teeth tips of the stator teeth is gradually improved along with the increase of the facing area of the magnetic surface, the total magnetic flux is increased, finally, the lateral magnetic flux driving the rotor to move is kept unchanged, the electromagnet obtains a nearly horizontal moment angle characteristic, the magnitude of the output moment can be adjusted by controlling the magnitude of the current, and a position control effect proportional to the current can be obtained when the electromagnet is matched with a linear spring for use.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but rather by the equivalents thereof as may occur to those skilled in the art upon consideration of the present inventive concept.
Claims (5)
1. The single-phase rotary proportional electromagnet comprises a stator, wherein a front end cover (3) and a rear end cover (12) are respectively arranged on the front side and the rear side of the stator, a rotor (4) is arranged in the stator, an output shaft (1) is arranged on the rotor (4), the output shaft (1) is connected with a reset torsion spring (2), and the axial leads of the stator, the rotor and the output shaft (1) are collinear; the method is characterized in that: the stator consists of a first stator (5), a second stator (8), a third stator (9) and a fourth stator (11) which are coaxially arranged, N pointed stator teeth (51) are uniformly distributed on the circumference of each stator ring, and the tooth tips of the stator teeth (51) extend clockwise or anticlockwise towards the circumference of the stator; the first stator (5) and the fourth stator (11) are the same in shape, the second stator (8) and the third stator (9) are the same in shape, and the stator teeth (51) form a stator magnetic surface (14);
the stator teeth of the first stator (5) and the second stator (8) are axially aligned, and the stator teeth of the third stator (9) and the fourth stator (11) are axially aligned; symmetrical grooves are formed between the second stator (8) and the third stator (9) along the interface, the grooves are mutually reversely buckled and spliced to form an annular groove (81), the annular groove (81) is used for placing the magnetism isolating ring (7), and a control coil (13) is wound on the magnetism isolating ring (7) to form control magnetic flux; a first permanent magnet (6) and a second permanent magnet (10) are respectively arranged between the first stator (5) and the second stator (8) and between the third stator (9) and the fourth stator (11) to form polarized magnetic flux;
n rotor teeth (41) are uniformly distributed on the rotor (4) along the circumferential direction, the rotor teeth (41) form rotor magnetic surfaces (42), and each rotor magnetic surface (42) and the stator magnetic surface (14) form a working air gap;
the tooth tips of the first stator (5) and the second stator (8) are in the same direction and are clockwise; the tooth tips of the third stator (9) and the fourth stator (11) have the same direction and are all anticlockwise; the stator teeth of the first stator (5) and the second stator (8) are behind the rotor teeth by an angle clockwise, and the stator teeth of the third stator (9) and the fourth stator (11) are ahead of the rotor teeth (41) by the same angle clockwise.
2. The single-phase rotary proportional electromagnet of claim 1, wherein: the reset torsion spring (2) comprises a spring (21), a coupler (22) and a spring cover plate (23), the spring cover plate (23) is connected with the front end cover (3), the spring (21) is installed on the spring cover plate (23), the coupler (22) is installed on the spring (21), and the rear end of the output shaft (1) is fixedly connected in a central hole of the coupler (22); the output shaft (1) is fixedly connected to the rotor (4).
3. The single-phase rotary proportioning electromagnet of claim 1 or 2, wherein: the stator structure is characterized in that 12 stator magnetic surfaces (14) are uniformly distributed on the circumferences of the first stator (5), the second stator (8), the third stator (9) and the fourth stator (11), each stator magnetic surface (14) is separated by 30 degrees, 12 rotor magnetic surfaces (42) are uniformly distributed on the rotor (4) along the circumferential direction, and each rotor magnetic surface (42) is separated by 30 degrees.
4. The single-phase rotary proportional electromagnet of claim 3, wherein: the rotor teeth of the first stator (5) and the second stator (8) are lagging the rotor teeth (41)1/4 tooth pitch angle in the clockwise direction, and the third stator (9) and the fourth stator (11) are leading the rotor teeth (41)1/4 tooth pitch angle.
5. The single-phase rotary proportional electromagnet of claim 4, wherein: the rotor (4) adopts a hollow cup structure, the front end cover (3), the magnetism isolating ring (7), the rear end cover (12) and the output shaft (1) are made of non-magnetic metal materials, and the rotor (4), the first stator (5), the second stator (8), the third stator (9) and the fourth stator (11) are made of high-magnetic-permeability metal soft magnetic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996818.3A CN113794292B (en) | 2021-08-27 | 2021-08-27 | Single-phase rotary proportional electromagnet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110996818.3A CN113794292B (en) | 2021-08-27 | 2021-08-27 | Single-phase rotary proportional electromagnet |
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| CN113794292A true CN113794292A (en) | 2021-12-14 |
| CN113794292B CN113794292B (en) | 2022-10-11 |
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000050536A (en) * | 1998-07-28 | 2000-02-18 | Minebea Co Ltd | Stator construction for claw-pole shaped stepping motor |
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