阅读说明：本技术 一种高功率密度的横向磁场电磁直线执行器 (Transverse magnetic field electromagnetic linear actuator with high power density ) 是由 吕治强 葛文庆 谭草 陆佳瑜 于 2021-09-15 设计创作，主要内容包括：本发明涉及一种高功率密度的横向磁场电磁直线执行器,包括外壳、端部支撑盖、直线轴承、输出轴、谐振弹簧、隔磁环、永磁体、动子铁芯、定子绕组、定子铁芯和定子铁芯齿,其特征在于定子铁芯安装于外壳内部,动子铁芯内部嵌入永磁体；动子铁芯安装于输出轴上,并固定于两侧的端部支撑盖上,隔磁环压装于动子铁芯的两端部,在隔磁环与端部支撑盖之间的输出轴上套放有谐振弹簧,工作时,向定子绕组通入电流,产生不均匀的气隙磁场,驱使永磁体、动子铁芯、谐振弹簧以及输出轴组成的谐振系统做直线运动,产生驱动力并带动负载运行。本发明在实现高速、高精度直线直接运动系统的驱动与控制的同时,保证了执行器具有高功率密度运行和所需的驱动能力。(The invention relates to a transverse magnetic field electromagnetic linear actuator with high power density, which comprises a shell, an end part supporting cover, a linear bearing, an output shaft, a resonant spring, a magnetism isolating ring, a permanent magnet, a rotor iron core, a stator winding, a stator iron core and stator iron core teeth, and is characterized in that the stator iron core is arranged in the shell, and the permanent magnet is embedded in the rotor iron core; the rotor iron core is arranged on the output shaft and fixed on the end supporting covers at two sides, the magnetic isolation rings are pressed at two ends of the rotor iron core, the output shaft between the magnetic isolation rings and the end supporting covers is sleeved with the resonant spring, when the rotor is in work, current is introduced to the stator winding, an uneven air gap magnetic field is generated, a resonant system formed by the permanent magnet, the rotor iron core, the resonant spring and the output shaft is driven to do linear motion, and driving force is generated to drive the load to run. The invention realizes the driving and control of a high-speed and high-precision linear direct motion system, and ensures that the actuator has high-power-density operation and required driving capability.)

1. A high power density transverse magnetic field electromagnetic linear actuator comprising: shell (1), tip support lid (2), linear bearing (3), output shaft (4), resonant spring (5), separate magnetic ring (6), permanent magnet (7), air gap (8), active cell iron core (9), stator winding (10), stator core (11) and stator core tooth (11.1), wherein:

the stator iron core (11) is a double-stator separated iron core, and is arranged in an aligned mode along the axial direction and installed inside the shell (1), s stator iron core teeth (11.1) which are evenly distributed are arranged on the inner surface of each stator iron core (11), a stator winding (10) is wound on each stator iron core tooth (11.1), and any adjacent winding coils are connected in series in a reverse mode;

m permanent magnets (7) are uniformly embedded into the rotor iron core (9) along the circumferential direction, and the magnetizing directions of any adjacent permanent magnets are opposite;

the rotor iron core (9) embedded with the permanent magnet (7) is coaxially and centrally arranged on the output shaft (4) and is fixed on the end supporting covers (2) at two sides through the linear bearing (3), the magnetism isolating ring (6) is pressed on two ends of the rotor iron core (9), and the resonance spring (5) is sleeved on the output shaft (4) between the magnetism isolating ring (6) and the end supporting covers (2).

2. A high power density transverse magnetic field electromagnetic linear actuator as claimed in claim 1 wherein: the number of stator core teeth (11.1) in each stator core (11) and the number of permanent magnets (7) meet the following requirements: s = m =2n, n being a positive integer.

3. A high power density transverse magnetic field electromagnetic linear actuator as claimed in claim 1 wherein: the stator winding (10) is a concentrated winding and is sequentially connected in series end to form a single-phase concentrated winding.

4. A high power density transverse magnetic field electromagnetic linear actuator as claimed in claim 1 wherein: the rotor iron core (9), the stator iron core (11) and the stator iron core teeth (11.1) are all made of soft magnetic materials and are formed by axially laminating multiple layers of non-oriented silicon steel sheets, and the shell (1), the end supporting cover (2) and the magnetism isolating ring (6) are made of non-magnetic materials.

Technical Field

The invention relates to the technical field of motors, in particular to a transverse magnetic field electromagnetic linear actuator with high power density.

Background

The electromagnetic linear actuator serving as an energy conversion device and a drive control actuating mechanism can convert one or more types of energy into mechanical energy which directly outputs linear motion outwards, has obvious advantages in the aspects of quality, volume, response and the like, and is widely applied to application occasions such as short stroke, large driving force, stable feeding and the like.

In the prior art, the power density and the control precision of the traditional cylindrical longitudinal magnetic field actuator are reduced due to the cross-coupling effect among all loads; the transverse magnetic field actuator effectively solves the coupling relation among all loads, improves the power density of the actuator, facilitates the miniaturization design due to the decoupling characteristic, and can greatly reduce the system cost. However, due to the inherent spatial three-dimensional magnetic circuit characteristic of the transverse magnetic field actuator, the manufacturing process difficulty is high, the structural complexity of the transverse magnetic field actuator is increased, and the application of the transverse magnetic field electromagnetic linear actuator is limited.

In order to simplify the processing technology, save the manufacturing cost and solve the problem of low power density of the traditional cylindrical longitudinal magnetic field actuator, the transverse magnetic field electromagnetic linear actuator structure with high power density is provided, the nonlinear output is greatly reduced under the conditions of ensuring the control precision and reducing the coupling influence of dynamic characteristics, and the power density, the working reliability and the application universality of the actuator are improved.

Disclosure of Invention

The invention discloses a transverse magnetic field electromagnetic linear actuator with high power density, which aims to reduce the manufacturing process difficulty of the actuator and improve the volume power density of the actuator and the efficiency of the whole electromechanical operation system; meanwhile, the plane competition relationship among the loads can be removed, the silicon steel sheet can be processed and manufactured by adopting a common silicon steel sheet processing technology, the heat dissipation capability is strong, the energy consumption is effectively reduced, the cost is saved, and the energy utilization rate is improved. The actuator has the advantages of higher control precision of a power system, stronger coordination capability and higher scientific significance and theoretical value.

A high power density transverse magnetic field electromagnetic linear actuator comprising: shell (1), tip support lid (2), linear bearing (3), output shaft (4), resonant spring (5), separate magnetic ring (6), permanent magnet (7), air gap (8), active cell iron core (9), stator winding (10), stator core (11) and stator core tooth (11.1), wherein: the stator iron core (11) is a double-stator separated iron core, and is arranged in an aligned mode along the axial direction and installed inside the shell (1), s stator iron core teeth (11.1) which are evenly distributed are arranged on the inner surface of each stator iron core (11), a stator winding (10) is wound on each stator iron core tooth (11.1), and any adjacent winding coils are connected in series in a reverse mode; m permanent magnets (7) are uniformly embedded into the rotor iron core (9) along the circumferential direction, and the magnetizing directions of any adjacent permanent magnets are opposite; the rotor iron core (9) embedded with the permanent magnet (7) is coaxially and centrally arranged on the output shaft (4) and is fixed on the end supporting covers (2) at two sides through the linear bearing (3), the magnetism isolating ring (6) is pressed on two ends of the rotor iron core (9), and the resonance spring (5) is sleeved on the output shaft (4) between the magnetism isolating ring (6) and the end supporting covers (2).

A high power density transverse magnetic field electromagnetic linear actuator as claimed in claim 1 wherein: the number of stator core teeth (11.1) in each stator core (11) and the number of permanent magnets (7) meet the following requirements: s = m =2n, n being a positive integer.

A high power density transverse magnetic field electromagnetic linear actuator as claimed in claim 1 wherein: the stator winding (10) is a concentrated winding and is sequentially connected in series end to form a single-phase concentrated winding.

A high power density transverse magnetic field electromagnetic linear actuator as claimed in claim 1 wherein: the rotor iron core (9), the stator iron core (11) and the stator iron core teeth (11.1) are all made of soft magnetic materials and are formed by axially laminating multiple layers of non-oriented silicon steel sheets, and the shell (1), the end supporting cover (2) and the magnetism isolating ring (6) are made of non-magnetic materials.

Compared with other technologies, the transverse magnetic field electromagnetic linear actuator with high power density provided by the invention has the following remarkable advantages:

(1) the magnetic circuit design of transverse magnetic flux is adopted to remove the coupling relation among all loads, the current controllability is strong, the driving and the control of a high-speed and high-precision linear direct motion system are realized, and the high-power-density operation and the required driving capability of the actuator are ensured;

(2) the rotor and the stator both adopt the processing technology of a common rotating motor, the structure is simple, the processing and the installation are convenient, and the manufacturing and maintenance cost is saved;

(3) the stator winding is arranged externally, so that the main heat source can be ensured to radiate heat through the shell, and the reliability of the actuator is improved; meanwhile, the moving and the stator adopt laminated silicon steel sheets, so that the eddy current loss can be greatly reduced, the nonlinear output is reduced, the working efficiency is improved, and the service life of the actuator is prolonged;

(4) aiming at different performance requirements and application targets, the structure can provide different parameter indexes, ensures the design flexibility of the actuator and has wide application range.

Drawings

Fig. 1 is a front view of a high power density transverse magnetic field electromagnetic linear actuator of the present invention.

Fig. 2 is a radial cross-sectional view of an embodiment of the present invention, which includes schematic stator and rotor laminations, an arrangement of permanent magnets, and a winding direction of a stator winding, where N, S is a magnetizing direction of a permanent magnet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, 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.

As shown in fig. 1, a transverse magnetic field electromagnetic linear actuator with high power density comprises: shell (1), tip support lid (2), linear bearing (3), output shaft (4), resonant spring (5), separate magnetic ring (6), permanent magnet (7), air gap (8), active cell iron core (9), stator winding (10), stator core (11) and stator core tooth (11.1), wherein: the stator iron core (11) is a double-stator separated iron core, and is arranged in an aligned mode along the axial direction and installed inside the shell (1), s stator iron core teeth (11.1) which are evenly distributed are arranged on the inner surface of each stator iron core (11), a stator winding (10) is wound on each stator iron core tooth (11.1), and any adjacent winding coils are connected in series in a reverse mode; m permanent magnets (7) are uniformly embedded into the rotor iron core (9) along the circumferential direction, and the magnetizing directions of any adjacent permanent magnets are opposite; the rotor iron core (9) embedded with the permanent magnet (7) is coaxially and centrally arranged on the output shaft (4) and is fixed on the end supporting covers (2) at two sides through the linear bearing (3), the magnetism isolating ring (6) is pressed on two ends of the rotor iron core (9), and the resonance spring (5) is sleeved on the output shaft (4) between the magnetism isolating ring (6) and the end supporting covers (2).

The number of stator core teeth (11.1) in each stator core (11) and the number of permanent magnets (7) meet the following requirements: s = m =2n, n being a positive integer.

The stator winding (10) is a concentrated winding and is sequentially connected in series end to form a single-phase concentrated winding.

The rotor iron core (9), the stator iron core (11) and the stator iron core teeth (11.1) are all made of soft magnetic materials and are formed by axially laminating multiple layers of non-oriented silicon steel sheets, and the shell (1), the end supporting cover (2) and the magnetism isolating ring (6) are made of non-magnetic materials.

As shown in fig. 1 and 2, where s = m =2n =4, n = 2. Four N-S alternate permanent magnets (7) are arranged in the rotor core (9) to form a square shape, each permanent magnet (7) corresponds to a stator core tooth (11.1) of the stator core (11), and a permanent magnet magnetic loop is formed through the stator core (11). The stator windings (10) are sequentially connected in series end to form a single-phase concentrated winding wound on the stator iron core teeth (11.1), and the adjacent stator iron core teeth (11.1) in each stator iron core (11) are reversely connected in series with the coils of the stator windings (10) on the adjacent stator iron core teeth (11.1) in the two stator iron cores (11). When the permanent magnet linear motor works, current is introduced into the stator windings (10), the armature magnetic field of one stator generates a magnetic field in the same direction as the permanent magnetic field to play a role in increasing magnetism, and the armature magnetic field of the other stator generates a magnetic field in the opposite direction to the permanent magnetic field to play a role in weakening magnetism, so that an uneven air gap magnetic field is generated, a resonance system consisting of the permanent magnet (7), the rotor iron core (9), the resonance spring (5) and the output shaft (4) is driven to do linear motion, driving force is generated, and the load is driven to run. If periodic single-phase alternating current is introduced, the air gap magnetic field intensity under different stators is changed alternately to generate an air gap reciprocating vibration magnetic field, the rotor can do periodic alternate reciprocating motion, and the air gap magnetic field change frequency is consistent with the power supply frequency; if direct current is introduced, the direction of the current needs to be adjusted through an electric control system, and the required motion law is realized. The output of the thrust or power with different magnitudes can be realized by adjusting the magnitude of the current, and the stability and the electromechanical conversion efficiency of the driving device are improved.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.