CN210053325U - Double-stator phase group concentrated winding and magnetism gathering type permanent magnet linear motor and driving mechanism - Google Patents
Double-stator phase group concentrated winding and magnetism gathering type permanent magnet linear motor and driving mechanism Download PDFInfo
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- CN210053325U CN210053325U CN201920930297.XU CN201920930297U CN210053325U CN 210053325 U CN210053325 U CN 210053325U CN 201920930297 U CN201920930297 U CN 201920930297U CN 210053325 U CN210053325 U CN 210053325U
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Abstract
The utility model provides a two stator phase groups concentrate wire winding and gather magnetic formula permanent magnetism linear electric motor and actuating mechanism, including a active cell and two face-to-face, the unilateral stator of setting in active cell both sides. The rotor is of a magnetic-gathering permanent magnet rotor structure, the permanent magnets are horizontally magnetized along the moving direction of the rotor, and the magnetizing directions of two adjacent permanent magnets are opposite; at least one of the unilateral stators has a winding, and the phase group concentrated winding mode is adopted. And each unilateral stator has certain air gap distance from the rotor, the two air gap distances are equal, and the two unilateral stators have the offset of one stator tooth width along the motion direction of the rotor. The present disclosure possesses high power density and high output thrust, and effectively suppresses reluctance force and thrust fluctuation.
Description
Technical Field
The utility model belongs to linear electric motor design and manufacturing field, in particular to two stator phase groups concentrate wire winding and gather magnetism formula permanent magnetism linear electric motor and actuating mechanism.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Compared with a rotating motor, the linear motor can directly realize the mutual conversion of electric energy and mechanical energy generated by linear motion without any intermediate conversion mechanism. Therefore, the linear motor can reduce the cost, reduce the equipment volume and improve the energy conversion efficiency, and has the advantages of simple structure, high precision and the like. At present, linear motors are widely applied to the fields of tidal power generation, rail transit, artillery launching and the like.
However, the inventor knows that the conventional linear motor has the problems of high magnetic flux leakage, high sensitivity to air gaps, low efficiency and low power factor, and the like although the structure is simple. With the emergence of high-performance permanent magnet materials, particularly the application of rare earth permanent magnets, the permanent magnet linear motor can have higher thrust density, higher efficiency, lower loss and better dynamic performance. However, rare earth materials (such as neodymium and dysprosium) have problems of high price and limited supply. The drastic fluctuations in price and the potential limitations of rare earth permanent magnet supplies present significant challenges for applications requiring large numbers of permanent magnet motors and mass production, such as large direct drive motors and automotive appliances. Therefore, development of a high-performance motor with less rare earth or no rare earth permanent magnet is advantageous for solving this problem.
At present, the design of a motor with a small amount of or without rare earth permanent magnets becomes a research hotspot, such as the development of high-performance switched reluctance motors and ferrite permanent magnet motors, the maximum reduction of the use amount of rare earth permanent magnets of the motors by optimized design, and the like. Among these motor alternatives, ferrite permanent magnet motors represent a great competitive advantage by taking torque (power) density, efficiency, torque ripple, and production cost into account. Particularly, the rotor structure with the magnetic flux polymerization effect enables the motor to have higher air gap magnetic flux density, and improves the electromagnetic thrust of the permanent magnet motor. Meanwhile, for the linear motor, the concentrated winding is adopted, so that harmonic electromotive force can be weakened, magnetic resistance can be inhibited, the structure is relatively simple, copper used at the end part of the coil is less, copper consumption is low, and the efficiency of the motor is improved. In addition, the double-stator linear motor has better thrust density than a single-side stator linear motor, and can offset the normal thrust component. However, the existing double-stator permanent magnet motor is only simple superposition of unilateral effects, and the performance of the double-stator permanent magnet motor is not fully exerted.
The application of the magnetism-gathering permanent magnet structure in the ferrite permanent magnet linear motor not only improves the electromagnetic thrust density of the motor, but also brings great magnetic resistance and electromagnetic thrust fluctuation. Electromagnetic thrust fluctuations can cause unacceptable vibration, acoustic noise, poor position control, and even operational failure. In a high-performance ferrite permanent magnet linear motor, electromagnetic thrust fluctuation must be minimized. However, since the mover having the magnetic concentration effect has a relatively complicated structure, technical research on the mover to reduce electromagnetic thrust fluctuations is currently relatively rare, and there are many problems. Such as: the permanent magnet optimal pole design can reduce electromagnetic thrust fluctuation, but the cost is accurate electric arc parameter calculation and thrust density degradation; the sinusoidal permanent magnet design can keep higher output thrust and greatly reduce thrust fluctuation, but the permanent magnet structure is relatively complex and only can be suitable for a low-magnetic-pole motor. Other methods, such as permanent magnet ramping, also inevitably introduce performance degradation and manufacturing difficulties.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, the present disclosure provides a double-stator phase group concentrated winding magnetism-gathering permanent magnet linear motor and a driving mechanism, and the motor of the present disclosure has high output electromagnetic thrust and effectively suppresses magnetic resistance and thrust fluctuation.
According to some embodiments, the following technical scheme is adopted in the disclosure:
a double-stator phase group concentrated winding magnetism-gathering type permanent magnet linear motor comprises a rotor and two unilateral stators which face each other and are arranged on two sides of the rotor, wherein the rotor of the motor is of a magnetism-gathering type permanent magnet structure, the permanent magnets are horizontally magnetized along the motion direction of the rotor, and the magnetization directions of the two adjacent permanent magnets are opposite;
at least one of the unilateral stators is provided with a phase group concentrated coil winding, each unilateral stator has a certain air gap distance from the rotor, the two air gap distances are equal, and the two unilateral stators have an offset of one stator tooth width along the moving direction of the rotor.
In the technical scheme, a mover structure with a magnetic flux polymerization effect is adopted, namely, the ferrite permanent magnets are horizontally magnetized along the moving direction of the mover, and the magnetization directions of two adjacent permanent magnets in the mover are opposite, so that the magnetic flux polymerization effect is realized, and the high performance of the ferrite magnet motor is further realized;
at least one stator is provided with a winding, the winding mode is a concentrated winding mode, the purpose is to improve the winding coefficient, reduce end winding and improve the motor efficiency, and each phase of winding adopts a modular design to improve the fault-tolerant capability of the motor; the stator is based on the structural design of the stator phase group concentrated coil winding, the double-stator dislocation technology is adopted, the effect of magnetic flux alternating polymerization is achieved, the electromagnetic thrust is further improved, and meanwhile, the magnetic resistance generated by the two air gap magnetic fields is mutually inhibited, so that the electromagnetic thrust fluctuation is effectively inhibited.
As an optional embodiment, both single-sided stators are formed by laminating silicon steel sheets, and armature windings are arranged on both stators, but permanent magnets are not arranged on the stators.
Or, the two unilateral stators are both formed by laminating silicon steel sheets, wherein one stator is provided with an armature winding but does not have a permanent magnet, and the other stator is not provided with the armature winding or the permanent magnet.
In an alternative embodiment, the slot width and the tooth width of the same phase of the single-side stator are the same, and the slot width between two different phases is larger than the slot width of the same phase.
In an alternative embodiment, the ratio of the slot width in the same phase to the slot width between different phases of the single-sided stator is 3/5.
In an optional embodiment, the three-phase winding of the single-side stator is in a three-phase symmetric distribution mode, and the electrical angle of the phase difference between two adjacent phases is 4 pi/3.
In an alternative embodiment, each single-sided stator has an extension of the width of the stator teeth at both ends to suppress end effects of the linear motor.
In an alternative embodiment, adjacent winding coils in the same phase of each single-sided stator have opposite polarities. Considering the horizontally alternating magnetization direction in the permanent magnet, the induced electromotive force of each winding coil will follow the same direction, thereby generating the maximum induced electromotive force vector.
Alternatively, the number of teeth in each phase on each stator is n
1The number of groups per stator phase is n
2The number of stator teeth of each stator is Q3 n
1n
2；
The number of the permanent magnets on the rotor unit with the same length as the stator is P-3 n
1n
2+n
2。
As an optional implementation manner, the mover is formed by connecting a plurality of mover units with the same structure in series.
A driving mechanism comprises the permanent magnet linear motor.
Compared with the prior art, the beneficial effect of this disclosure is:
1) the motor adopts a magnetic-gathering permanent magnet rotor structure, has a magnetic flux polymerization effect, and can adopt a low-cost ferrite permanent magnet while ensuring the high performance of the motor, so that the production and manufacturing cost of the motor is greatly reduced;
2) the motor adopts a phase group concentrated winding mode, each phase of winding on the stator is in a modular design, the fault-tolerant capability of the motor is greatly improved, the winding coefficient is improved, the end winding is reduced, and the copper consumption is reduced by adopting the concentrated winding, so that the motor efficiency is improved.
3) The two unilateral stators of the motor adopt a dislocation technology, namely the two stators deviate by a tooth (slot) distance along the moving direction of the rotor, so that the alternating polymerization of magnetic flux is realized, the air gap flux density waveform is improved, the electromagnetic thrust of the motor is improved, the magnetic resistance is reduced, and the thrust fluctuation is inhibited. The motor has the advantages of high thrust density, good efficiency, low manufacturing cost, low magnetic resistance and low electromagnetic thrust fluctuation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a schematic view of a partial structural interface of a double-stator-phase-group concentrated winding flux-concentrating permanent magnet linear motor according to a first embodiment of the present disclosure;
FIG. 2 is a magnetic circuit diagram of the stator of the present embodiment when the I slots are aligned with the magnetic poles;
FIG. 3 is a magnetic circuit diagram of the stator II of the present embodiment when the slots and the magnetic poles are aligned;
FIG. 4 is a magnetic circuit diagram of the magnetic pole and the stator slot of the present embodiment in any non-aligned position;
fig. 5(a), 5(b) depict a winding configuration of the present embodiment with an induced back EMF vector;
FIG. 6 is a diagram comparing the flux linkage of the winding according to the first embodiment of the disclosure;
FIG. 7 is a comparison graph of no-load back EMF according to a first embodiment of the present disclosure;
FIG. 8 is a graph comparing detent forces according to a first embodiment of the present disclosure;
FIG. 9 is a graph comparing electromagnetic thrust in accordance with an embodiment of the present disclosure;
FIG. 10 is a diagram comparing the flux linkage of the windings according to the second embodiment of the disclosure;
fig. 11 is a comparison graph of no-load back emf according to a second embodiment of the present disclosure;
FIG. 12 is a plot of detent force comparison according to example two of the present disclosure;
FIG. 13 is a graph comparing electromagnetic thrust according to an embodiment of the present disclosure;
FIG. 14 is a schematic structural diagram of a second embodiment of the disclosure;
in the figure, 1 is a stator I, 2 is a stator II, 3 is a mover, 4 is an armature winding, 5 is a ferrite permanent magnet, 6 is a B-phase armature winding, 7 is an a-phase armature winding, 8 is a C-phase armature winding, and the direction of the arrow on the permanent magnet is the magnetization direction of the permanent magnet.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Fig. 1 is a schematic view of a partial structural interface of a double-stator poly-magnetic ferrite permanent magnet linear motor according to an embodiment of the present disclosure. The motor is composed of a stator I1, a stator II2 and a rotor 3, and air gaps are formed between two sides of the two stators and two sides of the rotor. The length of the stator is shorter than that of the rotor, and the stator is composed of salient pole iron cores.
Specifically, the stator I1 and the stator II2 are designed by a specific structure based on a stator phase group concentrated winding mode and are formed by laminating silicon steel sheets, and armature windings are arranged on the two stators, but permanent magnets are not arranged on the two stators. The design of the internal grooves and the tooth width of the same phase are both designed to be pi/2. tau (tau is a reference width and is determined according to the specific specification of the motor), and the groove width between two different phases is 5 pi/6. tau for generating three-phase balanced counter electromotive force. The ratio of the pitch within a set of phases to the pitch between different phases is defined as σ ═ w
1/w
2Where w is 3/5 (pi/2 · τ)/(5 pi/6 · τ) ═ 3/5
1Is the pitch, w, of a phase group
2Is the pitch between two different phases. I.e. the tooth pitch size within the group and between the different phases on the stator should satisfy the above proportional relationship.
For stator I1, stator II2, adjacent coils in each phase have opposite polarities, their vector angle is pi (electrical angle). Therefore, considering the reversal magnetization directions of the permanent magnets, their electrical angle vector angles differ by 2 π (electrical angle), the induced electromotive forces of each coil will be in the same direction.
The three-phase winding is in a three-phase symmetrical distribution mode, and the phase difference between two adjacent phases is 4 pi/3 (electrical angle), so that three-phase balanced counter electromotive force can be generated.
The stator has no permanent magnet but has an armature winding in a phase group concentrated winding manner, and ● is opposite to the direction of current represented by the symbol x as shown in fig. 1.
The two stators with the same slot/tooth arrangement adopt a double-stator dislocation technology, namely, the two stators are offset by one stator tooth width along the moving direction of the rotor so as to achieve the purpose of alternating polymerization of magnetic flux.
Stator I1 and stator II2 both adopt a phase group concentrated winding mode, and high winding distribution coefficient and low end winding can be achieved.
Preferably, the mover of the motor of the present disclosure is stacked by silicon steel sheets, and a mover structure having a flux polymerizing effect is employed, in which magnets are magnetized in a horizontal direction and the polarities of the magnetized directions are alternately reversed from one magnet to an adjacent magnet. I.e. the magnetization directions of two adjacent permanent magnets are opposite.
Preferably, the number of teeth in each phase on each stator is n
1The number of groups per stator phase is n
2If the number Q of teeth on the stator I1 and the stator II2 is Q ═ 3n, respectively
1n
2。
Preferably, each stator has a tooth extension at each end, taking into account the magnetic path at the ends of the stator.
The double stators are distributed on two sides of the rotor, and the stators are preferably slotted for magnetic flux polymerization. The rotor is a fixed end, and the rotor is a moving end and can freely move in the horizontal direction. Number of turns n of phase taking group in the example of the present disclosure
1Is 4, the number n of each phase group
2Is 1; namely, each stator unit is provided with 12 teeth, the winding is wound on the teeth in a phase group concentrated winding mode, every 4 teeth belong to one phase, and the phase B, the phase A and the phase C are sequentially arranged from left to right as shown in the figure; the tooth width and the groove width are equal, and the ratio of the groove width in a single phase to the groove width between phases is 3:5, so that three-phase balanced counter electromotive force is generated. The two stators are offset by the distance of one slot width along the moving direction of the rotor to realize magnetismBy alternating polymerization.
The rotor non-permanent magnet part is formed by laminating silicon steel sheets, the rotor part as long as the stator is a rotor unit in the example, and the number of the ferrite permanent magnets on the rotor unit is P-3 n
1n
2+n
2The distribution of the permanent magnets is shown in fig. 1, and the magnetization direction is shown by the arrow on the permanent magnet in fig. 1.
In other embodiments, the electric machine of the present disclosure may be designed to be applied to both electric motors and generators.
The permanent magnet selected for the motor is low-cost ferrite, but the motor is not limited to the low-cost ferrite, and other permanent magnets can be selected;
the design of the stator windings demonstrates that the maximum induced electromotive force vector can be achieved, thereby improving power density and efficiency. This is due to the fact that adjacent winding coils within a phase are designed to be opposite in polarity, and considering the horizontally alternating magnetization direction in the permanent magnet, the induced electromotive force of each winding coil will follow the same direction, thereby generating the maximum induced electromotive force vector.
In summary, in order to achieve high performance of the ferrite magnet motor, the motor adopts a mover structure having a magnetic flux aggregation effect, that is, the ferrite permanent magnets are horizontally magnetized along the moving direction of the mover, and the magnetization directions of two adjacent permanent magnets in the mover are opposite, so as to achieve the magnetic flux aggregation effect; the stator winding is in a concentrated winding mode, the purpose is to improve the winding coefficient, reduce end winding and improve the motor efficiency, and each phase of winding adopts a modular design to improve the fault-tolerant capability of the motor; the stator is designed by a specific structure based on a stator phase group concentrated coil winding, a double-stator dislocation technology is adopted, the effect of magnetic flux alternating polymerization is realized, the output thrust of the motor is improved, and simultaneously, the magnetic resistance generated by two air gap magnetic fields is mutually inhibited, so that the electromagnetic thrust fluctuation is effectively inhibited.
The working principle of the embodiment disclosed by the disclosure is as follows:
when the A-phase winding is electrified, when the magnetic poles on the rotor move to be aligned with the slots of the stator I, the A-phase magnetic circuit is shown in figure 2, and the air gap reaches the maximum magnetic flux according to the principle of minimum magnetic resistance. Similarly, when the upper poles of the mover are moved into alignment with the slots in the stator II, the magnetic circuit is as shown in fig. 3, and the lower air gap reaches maximum flux at this time, according to the principle of minimum reluctance. Thus, the magnetic flux density in each air gap is improved. Referring to fig. 4, when the mover of the motor moves to any position where the magnetic poles are not aligned with the teeth of the stator, a magnetic circuit is formed between the stator I and the mover and between the stator II and the mover. Because of the size relationship between the stator structure and the rotor structure and the relationship between the number of the stator slots and the number of the rotors, when one phase is in the state that the stator slots are aligned with the magnetic poles, the other two phases are necessarily in the state that the magnetic poles are not aligned with the stator slots.
Considering that adjacent coils within a phase have opposite polarities, the induced electromotive force of each coil will follow the same direction, considering the alternating magnetization directions in the permanent magnet, thereby generating the maximum induced electromotive force vector, as shown in fig. 5(a) and 5 (b). Assuming that the winding passes sinusoidal current, a higher resultant output torque can be obtained than in the basic model.
Meanwhile, two sets of stator windings of the motor can be independently controlled respectively, and the fault-tolerant capability of the motor can be further improved by adopting a double three-phase control strategy.
Because the three-phase windings on the stator are separated by 4 pi/3 electrical degrees in the horizontal direction, when the mover moves in the horizontal direction, three-phase balanced induced electromotive force is generated in the three-phase windings. Similarly, three-phase balanced current is introduced into the stator winding, and the rotor can do linear motion in the horizontal direction.
Fig. 6 is a comparison graph of winding flux linkages between a double-stator phase group concentrated winding flux-concentrating permanent magnet linear motor (curve 1) and a conventional double-stator linear motor (curve 2) with the same structure and without adopting a double-stator dislocation technology according to an embodiment of the present disclosure. The curve 1 is the A-phase flux linkage of the double-stator phase group concentrated winding magnetism-gathering permanent magnet linear motor, and the curve 2 is the A-phase flux linkage of the traditional double-stator linear motor which does not adopt the double-stator dislocation technology.
Fig. 7 is a comparison graph of no-load back emf of a dual-stator phase group concentrated wound flux permanent magnet linear motor (curve 3) and a conventional dual-stator dislocation technology linear motor (curve 4) of the same structure in accordance with an embodiment of the present disclosure. Wherein, the curve 3 is the no-load counter electromotive force of the A-phase winding of the double-stator phase group concentrated winding magnetism-gathering permanent magnet linear motor, and the curve 4 is the no-load counter electromotive force of the A-phase winding of the traditional double-stator linear motor which does not adopt the double-stator dislocation technology; as can be seen, the motor of the present disclosure has a better sine of the null-regenerative back electromotive force waveform and a larger effective value.
Fig. 8 is a comparison plot of reluctance forces between a dual-stator phase group concentrated winding flux-concentrating permanent magnet linear motor (curve 5) and a conventional dual-stator linear motor (curve 6) of the same structure, which does not adopt the dual-stator offset technique, according to an embodiment of the present disclosure. Wherein, the curve 5 is the magnetic resistance of the double-stator phase group concentrated winding magnetism-gathering permanent magnet linear motor, and the curve 6 is the magnetic resistance of the traditional double-stator linear motor which does not adopt the double-stator dislocation technology; as can be seen from the figure, the motor magnetic resistance is smaller.
Fig. 9 is a graph comparing the electromagnetic thrust of a dual-stator phase group concentrated wound flux permanent magnet linear motor (curve 7) and a conventional dual-stator dislocation technology linear motor (curve 8) of the same structure according to an embodiment of the present disclosure. Curve 7 is the electromagnetic thrust of this two stator phase groups of this disclosure concentrated wire winding gather magnetism formula permanent magnetism linear electric motor, and curve 8 is the electromagnetic thrust of traditional two stators do not adopt two stator dislocation technique linear electric motor, can know from the figure, this disclosure motor electromagnetic thrust is bigger, and undulant littleer.
As shown in fig. 14, in the second embodiment of the present disclosure, a motor is provided and includes a stator 1, an auxiliary stator 2, and a mover 3, and an air gap is provided between two sides of the two stators and the mover. The length of the stator is shorter than that of the rotor, and the stator is composed of salient pole iron cores. The difference from the above embodiment is that the two stators are respectively a main stator and an auxiliary stator, and each stator has a certain air gap distance from the mover, and the two air gap distances are equal.
The main stator is designed by a specific structure based on a stator phase group concentrated winding mode and is formed by overlapping silicon steel sheets, and the main stator is provided with an armature winding but does not have a permanent magnet. Auxiliary statorThere is no armature winding and no permanent magnet. In the same phase of the main stator, the groove and the tooth width are designed to be pi/2. tau (tau is a reference width and is different according to different motor specifications), and the groove width between two different phases is 5 pi/6. tau for generating three-phase balanced counter electromotive force. The ratio of the pitch within a set of phases to the pitch between different phases is defined as σ ═ w
1/w
2Where w is 3/5 (pi/2 · τ)/(5 pi/6 · τ) ═ 3/5
1Is the pitch, w, of a phase group
2Is the pitch between two different phases. I.e. the tooth pitch size within the group and between the different phases on the stator should satisfy the above proportional relationship.
The windings on the main stator adopt a phase group concentrated winding mode, can weaken higher harmonic potential and inhibit magnetic resistance, and simultaneously has the advantages of high winding distribution coefficient and low end winding, reduces the copper consumption of the end parts of the windings, reduces the copper consumption and improves the motor efficiency.
In the embodiment, the main stator and the auxiliary stator adopt a dislocation technology, and the magnetic resistance force and the electromagnetic thrust fluctuation are greatly reduced under the action of the auxiliary stator.
Therefore, the distance between each phase of the three-phase winding on the stator in the horizontal direction is 4 pi/3 electrical degrees, and therefore, when the rotor moves in the horizontal direction, three-phase balanced induced electromotive force is generated in the three-phase winding. Similarly, when three-phase balanced current is introduced into the stator winding, the rotor can do linear motion in the horizontal direction.
Fig. 10 is a comparison graph of a phase a winding flux linkage between a flux-concentrating permanent magnet linear motor with an auxiliary stator (curve 1) and a conventional single-side stator flux-concentrating permanent magnet linear motor with the same structure (curve 2) according to an embodiment of the present disclosure. The sine degree of the flux linkage of the motor winding is better according to the graph.
Fig. 11 is a comparison graph of phase a winding back emf of a flux-concentrating permanent magnet linear motor with an auxiliary stator (curve 3) and a conventional single-side stator flux-concentrating permanent magnet linear motor with the same structure (curve 4) according to an embodiment of the present disclosure. As can be seen, the air-to-air back emf waveform of the motor of the present disclosure is more sinusoidal, but the effective value is slightly reduced.
Fig. 12 is a comparison plot of the magnetic reluctance force of a two-motor auxiliary stator flux concentration permanent magnet linear motor (curve 5) and a conventional single-stator flux concentration permanent magnet linear motor (curve 6) of the same construction, according to an embodiment of the present disclosure. As can be seen from the figure, the motor magnetic resistance of the present disclosure is greatly reduced.
Fig. 13 is a graph comparing the a-phase electromagnetic force fluctuation of a two-phase flux concentration permanent magnet linear motor with an auxiliary stator (curve 7) and a conventional single-side stator flux concentration permanent magnet linear motor with the same structure (curve 8) according to an embodiment of the present disclosure. As can be seen from the figure, the average value of the electromagnetic thrust of the motor is slightly reduced, but the fluctuation is greatly reduced.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. A double-stator phase group concentrated winding magnetism-gathering type permanent magnet linear motor is characterized in that: the permanent magnet rotor comprises a rotor and two unilateral stators which are arranged on two sides of the rotor in a face-to-face manner, wherein the rotor is of a magnetism-gathering permanent magnet rotor structure, the permanent magnets are horizontally magnetized along the moving direction of the rotor, and the magnetizing directions of the two adjacent permanent magnets are opposite;
at least one of the unilateral stators is provided with a winding which is in a phase group concentrated winding mode, each unilateral stator has a certain air gap distance from the rotor, the two air gap distances are equal, and the two unilateral stators have an offset of one stator tooth width along the motion direction of the rotor.
2. The double-stator-phase-group concentrated winding and magnetic gathering type permanent magnet linear motor as claimed in claim 1, which is characterized in that: the two unilateral stators are both formed by laminating silicon steel sheets, and armature windings are arranged on the two unilateral stators but do not have permanent magnets;
or, the two unilateral stators are both formed by laminating silicon steel sheets, wherein one stator is provided with an armature winding but does not have a permanent magnet, and the other stator is not provided with the armature winding or the permanent magnet.
3. The double-stator-phase-group concentrated winding and magnetic gathering type permanent magnet linear motor as claimed in claim 1, which is characterized in that: the slot width and the tooth width are the same in the same phase on the unilateral stator, and the slot width between two different phases is larger than that in the same phase.
4. The double-stator-phase-group concentrated winding and magnetic gathering type permanent magnet linear motor as claimed in claim 1, which is characterized in that: the ratio of the slot width within the same phase to the slot width between different phases of the single-sided stator is 3/5.
5. The double-stator-phase-group concentrated winding and magnetic gathering type permanent magnet linear motor as claimed in claim 1, which is characterized in that: the three-phase winding of the unilateral stator is in a three-phase symmetrical distribution mode, and the electrical angle of the phase difference of two adjacent phases is 4 pi/3.
6. The double-stator-phase-group concentrated winding and magnetic gathering type permanent magnet linear motor as claimed in claim 1, which is characterized in that: and the two ends of each unilateral stator are respectively provided with an extension of the width of the stator tooth.
7. The double-stator-phase-group concentrated winding and magnetic gathering type permanent magnet linear motor as claimed in claim 1, which is characterized in that: and the adjacent winding coils in the same phase of each unilateral stator have opposite polarities.
8. The double-stator-phase-group concentrated winding and magnetic gathering type permanent magnet linear motor as claimed in claim 1, which is characterized in that: the windings on the stator are in a modular design, and the windings of the same phase are used as a module.
9. The double-stator-phase-group concentrated winding and magnetic gathering type permanent magnet linear motor as claimed in claim 1, which is characterized in that: the number of teeth in each phase of each stator being n
1The number of groups per stator phase is n
2The number of stator teeth of each stator is Q3 n
1n
2；
Or/and the number of the permanent magnets on the rotor unit corresponding to the length of the stator is P-3 n
1n
2+n
2；
Or the rotor is formed by connecting a plurality of rotor units with the same structure in series.
10. A drive mechanism is characterized in that: a permanent magnet linear motor comprising any one of claims 1 to 9.
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| CN110165852A (en) * | 2019-06-19 | 2019-08-23 | 山东大学 | A kind of bimorph transducer phase group concentration coiling magneticfocusing permanent-magnetism linear motor |
| CN116780850A (en) * | 2023-08-24 | 2023-09-19 | 中国科学院宁波材料技术与工程研究所 | Primary modularized secondary bias structure permanent magnet synchronous linear motor and optimization method thereof |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110165852A (en) * | 2019-06-19 | 2019-08-23 | 山东大学 | A kind of bimorph transducer phase group concentration coiling magneticfocusing permanent-magnetism linear motor |
| CN116780850A (en) * | 2023-08-24 | 2023-09-19 | 中国科学院宁波材料技术与工程研究所 | Primary modularized secondary bias structure permanent magnet synchronous linear motor and optimization method thereof |
| CN116780850B (en) * | 2023-08-24 | 2024-01-09 | 中国科学院宁波材料技术与工程研究所 | Primary modularized secondary bias structure permanent magnet synchronous linear motor and optimization method thereof |
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