CN117997072B - Linear motor - Google Patents
Linear motorInfo
- Publication number
- CN117997072B CN117997072B CN202211342205.9A CN202211342205A CN117997072B CN 117997072 B CN117997072 B CN 117997072B CN 202211342205 A CN202211342205 A CN 202211342205A CN 117997072 B CN117997072 B CN 117997072B
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- coil
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- linear motor
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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
- H02K41/035—DC motors; Unipolar motors
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Linear Motors (AREA)
Abstract
本发明涉及一种直线电机用于与直流电源配合使用，包括线圈、磁体以及导磁组件，所述线圈用于与该直流电源电连接；磁体为至少一个，所述磁体可移动地设置于所述线圈，所述磁体具有朝向所述线圈的第一磁极和与所述第一磁极极性相反的第二磁极；所述导磁组件的第一端部插入所述线圈内，并且所述导磁组件的第二端部对应于所述磁体的所述第二磁极，用于在所述磁体的所述第一磁极和所述第二磁极之间形成穿过所述线圈的闭合回路，以使所述磁体沿着所述线圈的长度方向移动。该直线电机的结构简单，控制便捷，通过改变电源正负极即可改变运动方向。
This invention relates to a linear motor for use with a DC power supply, comprising a coil, a magnet, and a magnetic guiding assembly. The coil is electrically connected to the DC power supply. At least one magnet is movably disposed on the coil, and the magnet has a first magnetic pole facing the coil and a second magnetic pole with the opposite polarity to the first magnetic pole. A first end of the magnetic guiding assembly is inserted into the coil, and a second end of the magnetic guiding assembly corresponds to the second magnetic pole of the magnet, forming a closed loop through the coil between the first and second magnetic poles of the magnet, thereby allowing the magnet to move along the length of the coil. This linear motor has a simple structure and is easy to control; the direction of movement can be changed by altering the polarity of the power supply.
Description
Technical Field
The invention relates to the technical field of linear motors, in particular to a linear motor.
Background
A linear motor is a transmission device that converts electrical energy directly into linear motion mechanical energy without any intermediate conversion mechanism. It can be seen as a rotary electric machine which is radially split and formed by generating a plane. Linear motors are also known as linear motors, push rod motors. The most common types of linear motors are flat and U-slot, and tubular.
The linear motor has very wide application and huge market. In industrial and automation applications, linear motors are widely used in mechanical and electromechanical integration in machine tools, due to their unique advantages. However, the current direct current motors are basically provided with brushes, and the motors are complex to control and have relative problems of mechanical friction, noise, electric spark and the like.
Disclosure of Invention
Based on this, it is necessary to provide a linear motor with simple structure and convenient control, which can change the movement direction by changing the positive and negative poles of the power supply.
A linear motor for use with a dc power supply, comprising:
A coil for electrically connecting with the dc power supply;
At least one magnet movably disposed on the coil, the magnet having a first pole facing the coil and a second pole opposite to the first pole, and
And a magnetic conduction assembly, a first end of which is inserted into the coil, and a second end of which corresponds to the second magnetic pole of the magnet, for forming a closed loop between the first magnetic pole and the second magnetic pole of the magnet through the coil so as to move the magnet along the length direction of the coil.
In the above embodiment, the first end of the magnetic conductive member is inserted into the coil, and the second end of the magnetic conductive member corresponds to the second pole of the magnet, so as to form a closed loop of the magnetic induction line passing through the coil between the first pole and the second pole of the magnet. When the coil is connected with a direct current power supply, the magnetic induction line of each magnet faces to the second magnetic pole from the first magnetic pole, and at the moment, the electrified coil in the magnetic field is subjected to a ampere force, and the magnet is driven by the ampere force to move along the length direction of the coil. It should be noted that the direction of the ampere force can be determined by the left hand rule, the left palm center faces the flowing direction of the magnetic pole, the four fingertips point to the direction of the current, and the direction of the thumb can be the direction of the ampere force. In addition, the direction of current can be changed by changing the positive electrode and the negative electrode of the power supply, so that the movement direction is changed, and the reciprocating movement is realized.
In one embodiment, the magnetic conduction assembly comprises a first magnetic conduction piece wound with the coil and a second magnetic conduction piece fixedly connected with the second magnetic pole of the magnet, and the second magnetic conduction piece is magnetically slidably connected with the first magnetic conduction piece.
The magnet is arranged on one side of the second magnetic conduction piece, and the second magnetic conduction piece is connected with the first magnetic conduction piece in a sliding mode and is used for driving the second magnetic conduction piece to move when the magnet moves along the length direction of the coil. In addition, the second magnetic conduction piece can be connected with the first magnetic conduction piece in a magnetic conduction way, and then a closed loop passing through the coil is formed between the first magnetic pole and the second magnetic pole of the magnet through the first magnetic conduction piece and the second magnetic conduction piece.
In one embodiment, the first magnetic conductive member includes an iron core wound with the coil, a bottom plate magnetically connected with the iron core and the second magnetic conductive member, and a guide rail fixedly arranged on the bottom plate along the length direction of the coil, and the second magnetic conductive member is in sliding fit with the guide rail.
The second magnetic conduction piece is in sliding fit with the guide rail, and is used for driving the second magnetic conduction piece to move when the magnet moves along the length direction of the coil, and the bottom plate is connected with the iron core and the second magnetic conduction piece in a magnetic conduction manner respectively, so that the magnetic conduction effect is good.
In one embodiment, the iron core is disposed along a length direction of the bottom plate, and the iron core includes a winding portion for winding the coil and a supporting portion connected to the winding portion, and the supporting portion is fixedly connected to the bottom plate.
The winding part of iron core sets up along the length direction of bottom plate for twine and set up the coil, supporting part one end rigid coupling is on the bottom plate, and the other end and the winding part of supporting part are connected for the magnetic induction line of the first magnetic pole of the magnet that will pass the coil passes through the iron core and transmits bottom plate and second magnetic conduction spare, so that form complete closed circuit between first magnetic pole and the second magnetic pole.
In one embodiment, two of the support portions extend from both ends of the winding portion to the bottom plate, and the coil is located between the two support portions.
So set up, the supporting part extends to the bottom plate from the both ends of winding portion, and fixed effectual, and guide the magnetic induction line to the bottom plate through the supporting part, magnetic conduction is effectual.
In one embodiment, the second magnetic conductive member includes a magnetic conductive side plate slidably engaged with the guide rail, and the second magnetic pole of the magnet is closely attached to the magnetic conductive side plate.
The magnet is fixedly arranged on the magnetic conduction side plate, the second magnetic pole of the magnet is clung to the magnetic conduction side plate, and when the electrified coil in the magnetic field is driven to move by the action of the ampere force, the magnet can drive the magnetic conduction side plate which is in sliding fit with the guide rail to move along the length direction of the coil.
In one embodiment, the second magnetic conductive member further includes a connecting member, and the connecting member is installed on the magnetic conductive side plate and is in sliding fit with the guide rail.
So set up, connecting piece one end is connected with magnetic conduction curb plate, and the other end and the guide rail sliding connection of connecting piece for sliding fit's effect is good.
In one embodiment, in order to improve stability during movement, the number of the magnets is two, and the two magnets are symmetrically arranged at two sides of the coil, and a gap exists between the magnets and the coil.
The number of the magnets is two, the two magnets are symmetrically arranged on two sides of the coil, and the polarities of the opposite sides of the two magnets are the same, so that the stability of the moving process is greatly improved. Meanwhile, a gap exists between the magnet and the coil, so that the moving process of the magnet is smoother. In one embodiment, the linear motor further includes a non-magnetic conductive member, the non-magnetic conductive member is lapped on the two magnetic conductive side plates, and a gap exists between the non-magnetic conductive member and the coil.
So set up, the transmission of magnetic induction line is blocked at the top of two magnetic conduction curb plates to non-magnetic conduction spare overlap joint to guarantee that this ampere of force direction is unanimous, and the removal effect of this magnet is better. .
In one embodiment, the linear motor further comprises a position sensor, and the position sensor is mounted on the magnetic conduction assembly.
The position sensor is arranged on the magnetic conduction assembly and used for sensing the moving position of the magnet and accurately positioning the magnet.
The beneficial effects of the invention are as follows:
The first end of the magnetic conduction assembly is inserted into the coil, and the second end of the magnetic conduction assembly corresponds to the second magnetic pole of the magnet, so that a closed loop of magnetic induction wires passing through the coil is formed between the first magnetic pole and the second magnetic pole of the magnet. Thus, when the coil is connected to the dc power supply, the energizing coil in the magnetic field receives a ampere force, and the magnet is driven by the ampere force to move along the longitudinal direction of the coil. Further, the moving direction of the magnet may be changed by changing the current direction of the power supply.
Drawings
Fig. 1 is a schematic perspective view of a linear motor according to the present invention;
Fig. 2 is a schematic diagram of the operation of the linear motor of fig. 1.
Reference numerals illustrate:
1. coil, 2, magnet, 21, first magnetic pole, 22, second magnetic pole, 3, magnetic conduction assembly, 31, first magnetic conduction piece, 311, iron core, 3111, winding part, 3112, supporting part, 312, bottom plate, 313, guide rail, 32, second magnetic conduction piece, 321, magnetic conduction side plate, 322, connecting piece, 4, non-magnetic conduction piece.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
In the prior art, the rotary direct current motor adopts brushes, commutators or electronic circuits to commutate or commutate the input current of windings, so that the relative mechanical friction exists, and the obvious problems of noise, electric spark and the like are difficult to avoid.
When the brush-type DC motor in the prior art works, the windings and the commutators (phase) rotate, the main magnetic poles (stators) and the brushes do not rotate, the DC power supply is applied to the rotor windings through the brushes, and the alternating change of the current direction of the windings is changed along with the change of the positions of the commutators rotating by the motor and the brushes related to the commutators. When the brush DC motor rotor rotates to 90 degrees, two winding sides are positioned on the physical neutral plane of the magnetic field, the brushes are not contacted with the commutator, no current flows in the windings, and the torque disappears. The rotor of the brushed dc motor will continue to rotate through 90 deg. to 180 deg. due to mechanical inertia, where current again flows in the windings. According to the left hand rule, the direction of the stress of the two windings is still anticlockwise, and the rotor still rotates anticlockwise. The adoption of the structure of the electric brush, the commutator and the like can cause the problems of relative mechanical friction, high noise, easy electric spark generation and the like.
Based on this, this embodiment provides a linear electric motor, and this linear electric motor's simple structure has cancelled former direct current motor and has had the problem of brush and commutator, also need not the driver to carry out electronic commutation, and control is convenient, changes direction and the speed of motion through changing positive negative pole and electric current size.
Specifically, referring to fig. 1 and 2, an embodiment of the present invention provides a linear motor, which includes a coil 1, a magnet 2 and a magnetic conduction assembly 3, wherein the coil 1 is used for being electrically connected with the dc power supply, the number of the magnets 2 is at least one, the magnet 2 is movably arranged on the coil 1, the magnet 2 has a first magnetic pole 21 facing the coil 1 and a second magnetic pole 22 opposite to the first magnetic pole 21, a first end of the magnetic conduction assembly 3 is inserted into the coil 1, and a second end of the magnetic conduction assembly 3 corresponds to the second magnetic pole 22 of the magnet 2, so as to form a closed loop between the first magnetic pole 21 and the second magnetic pole 22 of the magnet 2 passing through the coil 1, so that the magnet 2 moves along the length direction of the coil 1. In this embodiment, the first magnetic pole 21 is an N pole, the second magnetic pole 22 is an S pole, and the external magnetic induction line of the magnet 2 goes to the N pole and enters the S pole.
In the above embodiment, the first end of the magnetic conduction assembly 3 is inserted into the coil 1, and the second end of the magnetic conduction assembly 3 corresponds to the second pole 22 of the magnet 2, so as to form a closed loop of the induction line passing through the coil 1 between the first pole 21 and the second pole 22 of the magnet 2. The closed loop of the induction lines of the magnets 2 is matched with the current of the coils 1, when the coils 1 are connected with a direct current power supply, since the external induction line of each magnet 2 faces the second magnetic pole 22 from the first magnetic pole 21, at the moment, the energized coils 1 are in a magnetic field, so that the magnets 2 are subjected to the ampere force, and the magnets 2 are driven by the ampere force to move along the length direction of the coils 1.
Alternatively, in some embodiments, the first pole 21 may be an S-pole and the second pole 22 an N-pole, respectively, which may result in the magnet 2 being subjected to an anharmonic force in a direction opposite to that of the above-described embodiments.
It should be noted that the direction of the ampere force can be determined by the left hand rule, the left palm center faces the flow direction of the magnetic pole, the four fingertips point to the direction of the current, and the direction of the thumb can be the direction of the ampere force. Therefore, the direction of current can be changed by changing the anode and the cathode of the power supply, so that the movement direction is changed, and the reciprocating movement is realized.
In this embodiment, the first magnetic pole 21 is an N pole, and the second magnetic pole 22 is an S pole, which will not be described in detail below. Further, if the dc power supply supplies a clockwise current (S1 in fig. 2), the first-direction ampere force (X1 in fig. 1 and 2) is generated when the current flows through the ab segment of the coil 1 (S2 in fig. 2) due to the external magnetic induction line of the magnet 2 facing the second magnetic pole 22 from the first magnetic pole 21, and the second-direction ampere force (X2 in fig. 1 and 2) is generated when the current flows through the ab segment of the coil 1 (S2 in fig. 2) due to the external magnetic induction line of the magnet 2 facing the second magnetic pole 22 from the first magnetic pole 21.
In the embodiment, the coil 1 is connected with a direct current power supply, the movement direction can be changed by changing the positive and negative poles of the power supply, the electric brush and the commutator are not needed for reversing, the use of the electric brush and the commutator is eliminated, and the driver is not needed for electronic reversing. The brushless motor removes the electric brush, and the direct change is that no electric spark is generated when the brush motor runs, so that the interference of the electric spark on remote control radio equipment is greatly reduced, and the brushless motor is particularly suitable for explosive places and has good explosion-proof effect. In addition, the brushless motor does not have a brush, friction force is greatly reduced during operation, operation is smooth, noise is low, and the advantage is a huge support for model operation stability. Meanwhile, the device has the advantages of long service life, low maintenance cost and the like. Further, the cost can be reduced without a Hall position sensor, the production difficulty of the motor is reduced, the anti-interference capability is high, and the motor is suitable for various working environments.
In some embodiments, the magnetic conduction assembly 3 includes a first magnetic conduction member 31 around which the coil 1 is wound and a second magnetic conduction member 32 fixedly connected to the second magnetic pole 22 of the magnet 2, and the second magnetic conduction member 32 is magnetically slidably connected to the first magnetic conduction member 31.
So set up, because magnet 2 installs in one side of second magnetic conduction spare 32, second magnetic conduction spare 32 and first magnetic conduction spare 31 sliding connection for when magnet 2 moves along the length direction of coil 1, drive second magnetic conduction spare 32 and remove. In addition, the second magnetic conductive member 32 is magnetically connected to the first magnetic conductive member 31, and further, a closed loop passing through the coil 1 can be formed between the first magnetic pole 21 and the second magnetic pole 22 of the magnet 2 through the first magnetic conductive member 31 and the second magnetic conductive member 32, so as to cooperate with the energizing coil 1 to form a power for pushing the magnet 2 to move.
In some embodiments, the first magnetic conductive member 31 includes an iron core 311 wound with a coil 1, a bottom plate 312 magnetically connected with the iron core 311 and the second magnetic conductive member 32, and a guide rail 313 fixed on the bottom plate 312 along the length direction of the coil 1, where the second magnetic conductive member 32 is slidably matched with the guide rail 313. So configured, the second magnetic conductive member 32 is slidably engaged with the guide rail 313, so as to drive the second magnetic conductive member 32 to move when the magnet 2 moves along the length direction of the coil 1. The bottom plate 312 is magnetically connected with the iron core 311 and the second magnetic conduction piece 32 respectively, and has good magnetic conduction effect, and is used for transmitting the magnetic induction line passing through the coil 1 from the iron core 311 to the bottom plate 312, and then transmitting the magnetic induction line to the second magnetic conduction piece 32, so as to realize a closed loop of the magnetic induction line of the magnet 2.
In some embodiments, the core 311 is disposed along a length direction of the base plate 312, and the core 311 includes a winding portion 3111 for winding the coil 1 and a support portion 3112 connected to the winding portion 3111, the support portion 3112 being fixedly connected to the base plate 312. So set up, the winding 3111 of iron core 311 sets up along the length direction of bottom plate 312 for twine and establish coil 1, twine effectually. One end of the supporting portion 3112 is fixedly connected to the bottom plate 312, and the other end of the supporting portion 3112 is connected to the winding portion 3111, so that the magnetic induction line of the first magnetic pole 21 passing through the magnet 2 of the coil 1 is transferred to the bottom plate 312 and the second magnetic conductive member 32 through the core 311, so that a complete closed loop (see the magnetic induction line flow direction of fig. 1) is formed between the first magnetic pole 21 and the second magnetic pole 22, and the design is reasonable.
In the present embodiment, preferably, two support portions 3112 extend from both ends of the winding portion 3111 to the bottom plate 312, and the coil 1 is located between the two support portions 3112. So set up, the support portion 3112 extends to bottom plate 312 from the both ends of winding portion 3111, and fixed effectual, and guide the magnetic induction line to bottom plate 312 through support portion 3112, magnetic conduction effect is good.
As an alternative embodiment, in the above embodiment, a specific installation position of the support portion 3112 is exemplified to realize magnetically conductive connection of the winding portion 3111 and the bottom plate 312. It should be noted that the installation position of the support portion 3112 is not limited to the two ends of the winding portion 3111, and the installation position of the support portion 3112 may be in the middle of the winding portion 3111, as long as the support and the magnetic conduction can be achieved.
Specifically, the second magnetic conductive member 32 includes a magnetic conductive side plate 321 slidably engaged with the guide rail 313, and the second magnetic pole 22 of the magnet 2 is closely attached to the magnetic conductive side plate 321. So set up, magnet 2 sets firmly on magnetic conduction curb plate 321, and the second magnetic pole 22 of magnet 2 hugs closely magnetic conduction curb plate 321, and when the power on coil 1 in the magnetic field receives the effect of ampere time power drive magnet 2 to remove, magnet 2 can drive with guide rail 313 sliding fit's magnetic conduction curb plate 321 remove along the length direction of coil 1.
Further, the second magnetic conductive member 32 further includes a connecting member 322, and the connecting member 322 is mounted on the magnetic conductive side plate 321 and slidably engaged with the guide rail 313. So set up, connecting piece 322 one end is connected with magnetic conduction curb plate 321, and connecting piece 322's the other end and guide rail 313 sliding connection for sliding fit's effect is good. Specifically, one end of the connecting piece 322 may be fixedly connected with the magnetically conductive side plate 321, or detachably connected with the magnetically conductive side plate 321, so long as the magnetically conductive side plate 321 is slidably connected to the guide rail 313.
In this embodiment, in order to improve the stability of the moving process, the number of the magnets 2 is two, and the two magnets 2 are symmetrically disposed at two sides of the coil 1, and a gap exists between the magnets 2 and the coil 1. The number of the magnets 2 is two, and the polarities of the opposite sides of the two magnets 2 are the same, so that the stability of the moving process is greatly improved. Meanwhile, a gap exists between the magnet 2 and the coil 1, so that the moving process of the magnet 2 is smoother. Specifically, since the polarities of the opposite sides of the two magnets 2 are the same, and the external magnetic induction lines of the magnets 2 face the second magnetic pole 22 from the first magnetic pole 21, referring to fig. 1 and 2, when the current flows through the ab-section of the coil 1 (as shown in fig. 2), one of the magnets 2 generates the ampere force in the first direction (as shown in X1 of fig. 1 and 2), and when the current flows through the cd-section of the coil 1 (as shown in fig. 2), the other magnet 2 generates the ampere force in the same direction as the ampere force in the first direction (as shown in X1 of fig. 1 and 2), the ampere force directions of the two ampere force are the same, and the ampere force directions can be accumulated to jointly act on the second magnetic conductive member 32, so that the moving effect is good.
The linear motor in this embodiment further includes a non-magnetic conductive member 4, the non-magnetic conductive member 4 is overlapped with the two magnetic conductive side plates 321, and a gap exists between the non-magnetic conductive member 4 and the coil 1. So set up, the transmission of magnetic induction line is blocked at the top of two magnetic conduction curb plates 321 to non-magnetic conduction spare 4 overlap joint to guarantee that this ampere of force direction is unanimous, and this magnet 2's removal effect is better.
It should be explained that, since the non-magnetic conductive member 4 is overlapped on the two magnetic conductive side plates 321, the magnetic induction line of the magnet 2 passing from the first magnetic pole 21 to the second magnetic pole 22 cannot pass through the upper portion of the coil 1. This arrangement prevents a second, opposite, ampere-force (shown as X2 in fig. 1 and 2) from being present in the opposite direction to the first, ampere-force when current is flowing through the bc segment of the coil 1 (shown in fig. 2), which counteracts each other, affecting the moving effect.
Further, since the winding portion 3111 of the core 311 passes through the coil 1 and is connected to the bottom plate 312 through the support portion 3112, the magnetically induced line of the magnet 2 flowing out from the first magnetic pole 21 enters from the coil 1, is transferred to the support portion 3112 and the bottom plate 312 through the winding portion 3111, is transferred to the second magnetic conductive member 32 through the guide rail 313, and finally enters the second magnetic pole 22 of the magnet 2, achieving a closed loop of the magnetically induced line. When current flows through da section of coil 1 (as shown in fig. 2), since iron core 311 transmits magnetic induction wire to bottom plate 312, at this time, magnetic induction wire does not pass through da section of energized coil 1 (as shown in fig. 2), so that no ampere force is generated when current flows through da section of coil 1 (as shown in fig. 2), and magnet 2 is always subjected to ampere force in the same direction.
In addition, a gap exists between the coil 1 wound around the winding portion 3111 and the bottom plate 312, so that the magnetic induction wire is prevented from being directly connected to the bottom plate 312 through the bottom of the coil 1, and the moving effect is prevented from being affected by a security force (shown in X2 of fig. 1 and 2) opposite to the security force in the first direction.
In some embodiments, there is a gap between the magnet 2 and the coil 1. By this arrangement, a gap exists between the magnet 2 and the coil 1, so that the moving process of the magnet 2 is smoother, and the moving can be realized only by making the ampere force (shown as X1 in fig. 1 and 2) in the first direction larger than the friction resistance on the guide rail 313.
In some embodiments, the linear motor further comprises a position sensor (not shown) mounted to the magnetic conductive assembly 3. So set up, the position sensor is installed at magnetic conduction subassembly 3 for the mobile position of response magnet 2 and pinpoint.
The beneficial effects of the invention are as follows:
The first end of the magnetically permeable assembly 3 is inserted into the coil 1, and the second end of the magnetically permeable assembly 3 corresponds to the second pole 22 of the magnet 2 for forming a closed loop of magnetically induced wires through the coil 1 between the first pole 21 and the second pole 22 of the magnet 2. In this way, when the coil 1 is connected to the dc power supply, the energizing coil 1 in the magnetic field receives the ampere force, and the magnet 2 is driven by the ampere force to move along the longitudinal direction of the coil 1. Further, the moving direction of the magnet 2 can be changed by changing the current direction of the power supply.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
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| CN109516336A (en) * | 2018-12-29 | 2019-03-26 | 刘英辉 | The control method of linear drive apparatus, safety tongs device and elevator device |
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| JP5508181B2 (en) * | 2010-08-03 | 2014-05-28 | 東芝機械株式会社 | Linear motor and linear motor device |
| WO2013114286A2 (en) * | 2012-02-01 | 2013-08-08 | Mane Sambhaji Shankarrao | Commutatorless and brushless dc machine with stationary armature and method of operating the same |
| CN107919781B (en) * | 2017-11-30 | 2020-02-21 | 歌尔股份有限公司 | Linear vibration motor |
| CN108591005B (en) * | 2018-04-10 | 2019-12-27 | 同济大学 | High-precision plunger pump driven based on voice coil motor principle |
| CN112217369B (en) * | 2019-07-09 | 2022-07-12 | 大族激光科技产业集团股份有限公司 | Linear motor |
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| CN109516336A (en) * | 2018-12-29 | 2019-03-26 | 刘英辉 | The control method of linear drive apparatus, safety tongs device and elevator device |
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