CN103929040B - Circular Winding polyphase ac linear induction motor system - Google Patents
Circular Winding polyphase ac linear induction motor system Download PDFInfo
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Abstract
Circular Winding polyphase ac linear induction motor system, belong to machine field, the present invention solves three-phase linear permanent-magnet synchronous motor to adopt traditional integer groove single layer winding, have that complex structure, cost are high, the magnetomotive force of winding and electromotive force harmonic components large, the force oscillation of motor is large, efficiency is low, the cross-brace span of mover large, and mover supports the large problem of difficulty.The present invention includes m cross streams linear electric motors and m/3 three-phase power converters; M=3k; Described m cross streams linear electric motors comprise primary and secondary; Elementaryly comprise elementary iron core and m/3 overlaps elementary Circular Winding, elementary Circular Winding is three-phase Circular Winding; Often adjacent two elementary Circular Winding corresponding mutually between electrical degree phase difference be δ, and δ=± 180 °/m; Three lead-out wires often overlapping elementary Circular Winding are corresponding with the ac output end of a three-phase power converters to be connected; M/3 three-phase power converters general DC busbar.
Description
Technical field
The present invention relates to Circular Winding polyphase ac linear induction motor system, belong to machine field.
Background technology
Polyphase linear motor adopts more than the primary winding structure of three-phase, and for the linear AC motor by inverter power supply, the number of phases of armature winding can be taken as a new free parameter.Compare with common three phase electric machine, its major advantage has: reduce phase winding operating current, thus reduces the capacity of switching device, is a kind of effective means adopting low-voltage standards power device to realize high-power grade; Improve magnetomotive force waveform, eliminate 5 times in motor, 7 inferior low-order harmonic magnetic fields and the force oscillation that caused by harmonic field, reduce the vibration & noise of motor, improve the stability of system and the dynamic and static characteristic of system; Meanwhile, elementary, secondary iron loss and copper loss reduce greatly, improve the efficiency of motor; Redundancy structure improves the reliability of system cloud gray model, there will not be because phase shortage causes the phenomenon that cannot start and run; The harmonic components etc. of direct current network side can be reduced.
Polyphase machine drive system compares the application scenario being suitable for low voltage power supply, high-power and high reliability.At present, the application of polyphase linear motor propulsion system lays particular emphasis on national defense and military, high reliability and powerful occasion more.The electromagnetic ejection system of such as aircraft carrier-based aircraft, early warning plane and electromagnetic launch technology of unmanned aerial vehicle system, guided missile auxiliary transmission system, straight line elevator propulsion system, magnetic suspension train propulsion system, scientific experiment high-speed straight-line propulsion system, spaceship auxiliary transmission system etc.
As shown in Figure 9, the armature core tooth pitch τ of traditional integer groove single layer winding flat plated three-phase linear permanent-magnet synchronous motor
twith the pole span τ of permanent magnet
pbetween meet relation 3 τ
t=τ
p, embed a coil side in each groove of elementary iron core, coil span is equal with pole span.The coil side of A phase winding embeds in first groove and the 4th groove, has striden across second groove and the 3rd groove simultaneously, and the coil side of C phase winding embeds in second groove and the 5th groove, striden across the 3rd groove and the 4th groove, by that analogy simultaneously.The subject matter that this type winding exists is: the end that each phase winding coil is exposed at outside core tooth is long, and each phase winding end winding intersects mutually, so not only waste electromagnetic wire, increase copper loss, also make the insulating process between each phase winding become complicated, add manufacturing cost.Meanwhile, because winding is that individual layer is whole apart from winding, the magnetomotive force of winding is large with electromotive force harmonic components, and the force oscillation of motor is large, efficiency is low, and due to the end of winding long, the cross-brace span of mover greatly, increases mover support difficulty.
Summary of the invention
The present invention seeks to adopt traditional integer groove single layer winding to solve three-phase linear permanent-magnet synchronous motor, have that complex structure, cost are high, the magnetomotive force of winding and electromotive force harmonic components large, the force oscillation of motor is large, efficiency is low, the cross-brace span of mover is large, mover supports the large problem of difficulty, provides a kind of Circular Winding polyphase ac linear induction motor system.
Circular Winding polyphase ac linear induction motor system of the present invention has two technical schemes.
First technical scheme, Circular Winding polyphase ac linear induction motor system of the present invention comprises m cross streams linear electric motors and m/3 three-phase power converters; M=3k, k be greater than 1 positive integer;
Described m cross streams linear electric motors comprise primary and secondary;
Elementaryly comprise elementary iron core and m/3 overlaps elementary Circular Winding, described elementary Circular Winding is three-phase Circular Winding; Often adjacent two elementary Circular Winding corresponding mutually between electrical degree phase difference be δ, and the δ that satisfies condition=± 180 °/m; Three ac output end one_to_one corresponding of three lead-out wires and a three-phase power converters that often overlap elementary Circular Winding are connected;
M/3 three-phase power converters general DC busbar, the electrical degree phase difference of the corresponding phase current of often adjacent two three-phase power converters output is δ.
Second technical scheme: Circular Winding polyphase ac linear induction motor system of the present invention comprises m cross streams linear electric motors and m phase power inverter; M be more than or equal to 5 positive integer;
Described m cross streams linear electric motors comprise primary and secondary;
Elementaryly comprise elementary iron core and elementary Circular Winding, described elementary Circular Winding is m phase Circular Winding; Electrical degree phase difference between the elementary Circular Winding of every adjacent two-phase is δ, and the δ that satisfies condition=± 360 °/m; Every phase winding lead-out wire of elementary Circular Winding is connected with an ac output end of m phase power inverter;
M phase power inverter exports m phase current, and the electrical degree phase difference between every adjacent biphase current is δ.
Advantage of the present invention: the present invention can reduce magnetomotive force and the electromotive force harmonic wave of linear electric motors winding, improve motor thrust and efficiency, reduce force oscillation, reduce motor oscillating and noise, the structure of motor is simple simultaneously, low cost of manufacture, fault-tolerant ability are strong, reliability is high, are suitable for the occasions such as high speed, high acceleration, high thrust.
Accompanying drawing explanation
Fig. 1 is the structural representation of Circular Winding polyphase ac linear induction motor system described in execution mode one; This figure provides the specific embodiment of m=6;
Fig. 2 is the structural representation of Circular Winding polyphase ac linear electric motors described in execution mode three;
Fig. 3 is the end view of Fig. 2;
Fig. 4 is the structural representation of Circular Winding polyphase ac linear electric motors described in execution mode five;
Fig. 5 is the end view of Fig. 4;
Fig. 6 is the structural representation of Circular Winding polyphase ac linear induction motor system described in execution mode two; This figure provides the specific embodiment of m=5;
Fig. 7 is the structural representation of Circular Winding polyphase ac linear electric motors described in execution mode three;
Fig. 8 is the structural representation of Circular Winding polyphase ac linear electric motors described in execution mode five;
Fig. 9 is the structural representation of integer groove single layer winding traditional in background technology.
Embodiment
Embodiment one: present embodiment is described below in conjunction with Fig. 1, Circular Winding polyphase ac linear induction motor system described in present embodiment, it comprises m cross streams linear electric motors and m/3 three-phase power converters; M=3k, k be greater than 1 positive integer;
Described m cross streams linear electric motors comprise elementary 1 and secondary 2;
Elementary 1 comprises elementary 1-1 and m/3 unshakable in one's determination overlaps elementary Circular Winding 1-2, and described elementary Circular Winding 1-2 is three-phase Circular Winding; Often adjacent two elementary Circular Winding 1-2 corresponding mutually between electrical degree phase difference be δ, and the δ that satisfies condition=± 180 °/m; Three ac output end one_to_one corresponding of three lead-out wires and a three-phase power converters that often overlap elementary Circular Winding 1-2 are connected;
M/3 three-phase power converters general DC busbar, the electrical degree phase difference of the corresponding phase current of often adjacent two three-phase power converters output is δ.
Be described for the m=6 that Fig. 1 provides, the elementary Circular Winding 1-2 of two covers is had in these six cross streams linear electric motors, the phase difference often overlapping the corresponding phase of elementary Circular Winding 1-2 is electrical degree 30 °, namely between A1 phase with A2 phase, phase difference is electrical degree 30 °, between B1 phase with B2 phase, phase difference is electrical degree 30 °, and between C1 phase with C2 phase, phase difference is electrical degree 30 °.
These six cross streams linear electric motors have two three-phase power converters, two three-phase power converters general DC busbars, and the electrical degree phase difference of every phase current that three-phase power converters exports is 30 °, and namely A1 and B1 differs 30 °, and B1 and C1 differs 30 °.
Embodiment two: present embodiment is described below in conjunction with Fig. 6, Circular Winding polyphase ac linear induction motor system described in present embodiment, it comprises m cross streams linear electric motors and m phase power inverter; M be more than or equal to 5 positive integer;
Described m cross streams linear electric motors comprise elementary 1 and secondary 2;
Elementary 1 comprises elementary 1-1 unshakable in one's determination and elementary Circular Winding 1-2, and described elementary Circular Winding 1-2 is m phase Circular Winding; Electrical degree phase difference between the elementary Circular Winding 1-2 of every adjacent two-phase is δ, and the δ that satisfies condition=± 360 °/m; Every phase winding lead-out wire of elementary Circular Winding 1-2 is connected with an ac output end of m phase power inverter;
M phase power inverter exports m phase current, and the electrical degree phase difference between every adjacent biphase current is δ.
Be described for the m=5 that Fig. 6 provides, five phase winding lead-out wires of five cross streams linear electric motors connect one to one respectively with five ac output ends of five phase power inverters.
Embodiment three: present embodiment is described below in conjunction with Fig. 2, Fig. 3 and Fig. 7, present embodiment is described further execution mode one or two, and secondary 2 is bilateral structure, there is air gap between elementary 1 and secondary 2;
The cross section of elementary 1-1 unshakable in one's determination is rectangle, and in air gap side, two, the left and right of elementary 1-1 unshakable in one's determination, edge is perpendicular to the symmetrical fluting of the direction of motion, and each groove is uniform along the direction of motion; Elementary Circular Winding 1-2 is Circular Winding, and the coil forming elementary Circular Winding 1-2 is rectangle, jointly embeds a coil in two grooves that the right position of elementary 1-1 unshakable in one's determination is corresponding.
Two effective edges of each coil embed in two, the left and right of elementary 1-1 unshakable in one's determination correspondence, symmetrical channels, only embed a coil side in each groove, get up to form polyphase windings by coil attachment whole in elementary 1-1 groove unshakable in one's determination according to certain rule.
Embodiment four: present embodiment is described further execution mode one or two, secondary 2 is bilateral structure, there is air gap between elementary 1 and secondary 2;
The cross section of elementary 1-1 unshakable in one's determination is rectangle, and install multiple coil rack in air gap side, two, the left and right of elementary 1-1 unshakable in one's determination, the opening line embedding groove of two air gap sides on coil rack is evenly distributed along the direction of motion; Coil rack adopts nonmetallic materials to form; The coil forming elementary Circular Winding 1-2 is rectangle, jointly embeds a coil in two grooves that the right position of elementary 1-1 unshakable in one's determination is corresponding.
Two effective edges of each coil embed in two, the left and right of coil rack correspondence, symmetrical openings line embedding groove, only embed a coil side in each opening line embedding groove, according to certain rule, coil attachment whole in the opening line embedding groove groove of coil rack is got up to form polyphase windings.
Embodiment five: present embodiment is described below in conjunction with Fig. 4, Fig. 5 and Fig. 8, present embodiment is described further execution mode one, two, three or four, described m cross streams linear electric motors also comprise two auxiliary primary iron cores 3, auxiliary primary iron core 3, elementary 1 and auxiliary primary iron core 3 array from left to right, all there is air gap between secondary 2 and elementary 1 and two auxiliary primary iron cores 3; The cross section of auxiliary primary iron core 3 is rectangle.
Two Symmetry Edges of secondary 2 are separately positioned between elementary 1 and an auxiliary primary iron core 3.
Embodiment six: present embodiment is described further execution mode one, two, three, four or five, secondary 2 is three limit structures, there is air gap between elementary 1 and secondary 2;
The cross section of elementary 1-1 unshakable in one's determination is rectangle, all slots in three air gap sides of elementary 1-1 unshakable in one's determination, and on elementary 1-1 unshakable in one's determination tri-faces, the groove of same position is communicated with formation door shape groove, and each shape groove is uniform along the direction of motion; The coil forming elementary Circular Winding 1-2 is rectangle, embeds a coil in each the shape groove of elementary 1-1 unshakable in one's determination.
The limit, the left and right sides of square coil and upper side edge are effective edge, and effective edge is embedded in the door shape groove of elementary 1-1 unshakable in one's determination.
Embodiment seven: present embodiment is described further execution mode one, two, five or six, elementary 1-1 unshakable in one's determination is cylindrical shape or square tube shape, and circumferentially slot at the inner surface of elementary 1-1 unshakable in one's determination or outer surface, each groove is evenly distributed along the direction of motion; The coil of elementary Circular Winding 1-2 is annular or square, embeds a coil in each groove; Secondary 2 be positioned at elementary 1 inside or outside, the two is coaxial, is air gap between elementary 1 and secondary 2.
Elementary 1-1 unshakable in one's determination is cylindrical shape, then along the circumferential direction slot at the inner surface of elementary 1-1 unshakable in one's determination or outer surface.
Elementary 1-1 unshakable in one's determination is square tube shape, then at the inner surface of elementary 1-1 unshakable in one's determination or outer surface along perpendicular to direction of motion fluting, in the present embodiment, slot also referred to as circumference.
Embodiment eight: present embodiment is described further execution mode one or two, secondary 2 is single-side structural, is air gap between secondary 2 and the upper surface of elementary 1-1 unshakable in one's determination;
The cross section of elementary 1-1 unshakable in one's determination is square, and transversely slot at the upper surface of elementary 1-1 unshakable in one's determination, each groove is uniform along the direction of motion; An effective edge of each coil of elementary Circular Winding 1-2 is embedded in a groove.
Embodiment nine: present embodiment is described further execution mode one or two, described m cross streams linear electric motors are long elementary, short secondary structure, elementary 1 is divided into Multi-segment primary unit along the direction of motion, and the winding leading-out wire of every section of primary unit is connected with the ac output end of a polyphase ac linear electric motors power converter cell.
Every section of primary unit is as a complete polyphase ac linear electric motor primary.
Embodiment ten: present embodiment is described further execution mode one or two, m cross streams linear electric motors are line inductance electromotor, linear permanent magnet synchronous motor or linear reluctance motor.
Claims (9)
1. Circular Winding polyphase ac linear induction motor system, is characterized in that, it comprises m cross streams linear electric motors and m/3 three-phase power converters; M=3k, k be greater than 1 positive integer;
Described m cross streams linear electric motors comprise elementary (1) and secondary (2);
Elementary (1) comprises elementary iron core (1-1) and m/3 overlaps elementary Circular Winding (1-2), and described elementary Circular Winding (1-2) is three-phase Circular Winding; Often adjacent two elementary Circular Winding (1-2) corresponding mutually between electrical degree phase difference be δ, and the δ that satisfies condition=± 180 °/m; Three ac output end one_to_one corresponding of three lead-out wires and a three-phase power converters that often overlap elementary Circular Winding (1-2) are connected;
M/3 three-phase power converters general DC busbar, the electrical degree phase difference of the corresponding phase current of often adjacent two three-phase power converters output is δ.
2. Circular Winding polyphase ac linear induction motor system according to claim 1, it is characterized in that, secondary (2) are bilateral structure, there is air gap between elementary (1) and secondary (2);
The cross section of elementary iron core (1-1) is rectangle, and in air gap side, two, the left and right of elementary iron core (1-1), edge is perpendicular to the symmetrical fluting of the direction of motion, and each groove is uniform along the direction of motion; Elementary Circular Winding (1-2) is Circular Winding, and the coil forming elementary Circular Winding (1-2) is rectangle, jointly embeds a coil in two grooves that the right position of elementary iron core (1-1) is corresponding.
3. Circular Winding polyphase ac linear induction motor system according to claim 1, it is characterized in that, secondary (2) are bilateral structure, there is air gap between elementary (1) and secondary (2);
The cross section of elementary iron core (1-1) is rectangle, and install multiple coil rack in air gap side, two, the left and right of elementary iron core (1-1), the opening line embedding groove of two air gap sides on coil rack is evenly distributed along the direction of motion; Coil rack adopts nonmetallic materials to form; The coil forming elementary Circular Winding (1-2) is rectangle, jointly embeds a coil in two grooves that the right position of elementary iron core (1-1) is corresponding.
4. Circular Winding polyphase ac linear induction motor system according to claim 1, it is characterized in that, described m cross streams linear electric motors also comprise two auxiliary primary iron cores (3), auxiliary primary iron core (3), elementary (1) and auxiliary primary iron core (3) array from left to right, and all there is air gap between secondary (2) and elementary (1) and two auxiliary primary iron cores (3); The cross section of auxiliary primary iron core (3) is rectangle.
5. Circular Winding polyphase ac linear induction motor system according to claim 1, it is characterized in that, secondary (2) are three limit structures, there is air gap between elementary (1) and secondary (2);
The cross section of elementary iron core (1-1) is rectangle, all slot in three air gap sides of elementary iron core (1-1), on elementary iron core (1-1) three faces, the groove of same position is communicated with formation door shape groove, and each shape groove is uniform along the direction of motion; The coil forming elementary Circular Winding (1-2) is rectangle, embeds a coil in each shape groove of elementary iron core (1-1).
6. Circular Winding polyphase ac linear induction motor system according to claim 1, it is characterized in that, elementary iron core (1-1) is cylindrical shape or square tube shape, and circumferentially slot at the inner surface of elementary iron core (1-1) or outer surface, each groove is evenly distributed along the direction of motion; The coil of elementary Circular Winding (1-2) is annular or square, embeds a coil in each groove; Secondary (2) are positioned at inside or the outside of elementary (1), and the two is coaxial, is air gap between elementary (1) and secondary (2).
7. Circular Winding polyphase ac linear induction motor system according to claim 1, it is characterized in that, secondary (2) are single-side structural, are air gap between the upper surface of secondary (2) and elementary iron core (1-1);
The cross section of elementary iron core (1-1) is square, and transversely slot at the upper surface of elementary iron core (1-1), each groove is uniform along the direction of motion; An effective edge of each coil of elementary Circular Winding (1-2) is embedded in a groove.
8. Circular Winding polyphase ac linear induction motor system according to claim 1, it is characterized in that, described m cross streams linear electric motors are long elementary, short secondary structure, elementary (1) is divided into Multi-segment primary unit along the direction of motion, and the winding leading-out wire of every section of primary unit is connected with the ac output end of a polyphase ac linear electric motors power converter cell.
9. Circular Winding polyphase ac linear induction motor system according to claim 1, it is characterized in that, m cross streams linear electric motors are line inductance electromotor, linear permanent magnet synchronous motor or linear reluctance motor.
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CN106685307A (en) * | 2016-08-30 | 2017-05-17 | 山东大学(威海) | Motor driver topology and control algorithm |
CN108233817B (en) * | 2018-01-15 | 2020-04-17 | 中国人民解放军海军工程大学 | Six-phase linear induction motor energy chain switching control system and method |
CN108768129A (en) * | 2018-06-08 | 2018-11-06 | 浙江大学 | High thrust double three-phase permanent-magnetic linear synchronized motor for cordless elevator lifting system |
DE102018216766A1 (en) * | 2018-09-28 | 2020-04-02 | Siemens Aktiengesellschaft | Power supply system for a water-bound facility |
CN110798081A (en) * | 2019-10-31 | 2020-02-14 | 上海机电工程研究所 | Power supply equipment for ship-borne missile |
CN114123706A (en) * | 2020-07-22 | 2022-03-01 | 上海电机学院 | Linear motor transportation system |
CN113922625B (en) * | 2021-09-15 | 2022-09-09 | 中国人民解放军海军工程大学 | Long primary permanent magnet synchronous motor with annular structure |
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