CN108288905B - Non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor - Google Patents
Non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor Download PDFInfo
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- CN108288905B CN108288905B CN201810193201.6A CN201810193201A CN108288905B CN 108288905 B CN108288905 B CN 108288905B CN 201810193201 A CN201810193201 A CN 201810193201A CN 108288905 B CN108288905 B CN 108288905B
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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
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- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
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Abstract
The invention discloses a non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor which comprises a primary and two secondary, wherein an air gap is formed between the primary and the secondary. The primary comprises m x k x n basic units, m is a phase number, k is a positive integer, and n is a motor unit number. Each basic unit comprises two cross magnetic conductive materials, an excitation winding is arranged in a groove in the middle of the basic unit, an armature winding is arranged in grooves on two sides of the basic unit, and the winding surrounds the yoke part of the basic unit. The secondary is a magnetic conduction material with a tooth slot structure and is positioned at two sides of the primary. Compared with the prior art, the invention has the advantages of short winding end length, no overlapping of windings, small motor loss, high power density and efficiency, small normal tension and the like, and is suitable for occasions needing wide speed regulation and high power, such as urban rail transit, electromagnetic ejection, vertical lifting systems and the like.
Description
Technical Field
The invention relates to a bilateral electro-magnetic flux switching linear motor, and belongs to the technical field of motor manufacturing.
Background
With the continuous progress of technology in the industrial field, motors are increasingly used. In recent years, a plurality of emerging fields have higher requirements on motor driving, and the traditional rotary motor and mechanical conversion device are complex to use in some occasions and low in efficiency, so that the linear motor well solves the problem, and has great advantages in terms of simplifying a system, reducing noise, accelerating response and improving efficiency.
The induction motor has simple structure, low efficiency and complex control method. The permanent magnet brushless synchronous linear motor has the advantages of high efficiency, high power density and the like, but the permanent magnet is arranged at the secondary of the motor, is easy to fall off and has high-temperature demagnetization risk, so that the magnetic field is unstable; the adoption of the non-magnetic sleeve to fix the permanent magnet can increase the length of an air gap of the motor and the volume of the motor. And the permanent magnet is expensive and is not suitable for long-distance occasions.
In recent years, a primary electro-magnetic flux switching linear motor has received extensive attention from related expert students, and the motor does not use a permanent magnet, does not have the risk of demagnetization, and is more stable in system operation. The armature winding and the exciting winding are simultaneously arranged at the primary, and the secondary is only made of magnetic conductive materials, so that the structure is simple and the maintenance is convenient. However, the armature winding and the exciting winding of the current motor have overlapping phenomenon, the winding is complex to set, the winding end is longer, copper loss is large, and the output power and the efficiency of the motor are low. Therefore, the improvement of the winding structure of the motor has important significance.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a tooth-slot type double-sided electro-magnetic flux switching linear motor with non-overlapped windings, which improves the winding distribution mode and increases the counter-potential amplitude of the motor so as to improve the output power density; meanwhile, the motor has no winding overlapping phenomenon, reduces the length of winding end parts, reduces copper consumption and improves efficiency.
In order to achieve the above object, the present invention is realized by the following technical scheme:
the invention provides a non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor, which comprises a secondary 10, a primary 11, an exciting winding 112 and an armature winding 113, wherein the secondary 10, the primary 11, the exciting winding 112 and the armature winding 113 are arranged on two sides of the primary 11, and an air gap is formed between the secondary 10 and the primary 11;
according to the number of motor phases, the number of motor units and the number of armature windings connected in series, the primary 11 comprises a plurality of base units 110 connected end to end, and the base units 110 comprise 2 cross-shaped magnetic conductive materials 111; each of the basic units 110 includes 1 exciting winding 112 and 2 armature windings 113, the exciting winding 112 is disposed in the middle of the basic unit 110, the armature windings 113 are disposed at both sides of the basic unit 110, and the exciting winding 112 and the armature windings 113 are wound on a primary yoke formed of the magnetic conductive material 111.
Further, the secondary 10 has a tooth slot structure, and includes a secondary yoke 100 and secondary teeth 101.
Further, the primary 11 includes m×k×n basic units 110, m is the number of phases of the motor, k is the number of pairs of in-phase armature windings 113 connected in series in each motor unit, and n is the number of motor units;
further, the exciting windings 112 of adjacent base units 110 are wound in opposite directions;
further, the distance between the central lines of two adjacent magnetic conducting teeth of the primary 11 is tau p The distance between the central lines of two adjacent secondary teeth 101 of the secondary 10 is tau s The armature windings 113 are distributed according to tau s /τ p The differences of (a) are divided into the following three categories:
in a first class of this type,
in the second category of the products,
a third class of the type of the liquid,
wherein i is a natural number.
When τ is s /τ p In the first case, the windings of the armature windings 113 in the same basic unit 110 are wound in opposite directions; two adjacent armature windings 113 belonging to adjacent base units 110 are wound in opposite directions; the armature windings 113 in k consecutive base units 110 form a phase winding, m x k consecutive base units 110 form a motor unit, n motor units form the complete primary 11.
When τ is s /τ p In the second case, the armature windings 113 belonging to two adjacent basic units 110 in the same primary 11 tooth slot are wound in the same direction; when the motor is in an odd number phase, the armature windings 113 in every k/2 continuous slots form a phase winding, and when the motor is in an even number phase, the armature windings 113 in every k continuous slots form a phase winding;
wherein, the winding direction of the armature winding 113 in the tooth slot of any primary 11 is the same as the winding direction of the armature winding 113 on one side adjacent to the armature winding, and is opposite to the winding direction of the armature winding 113 on the other side adjacent to the armature winding; m x k continuous basic units 110 form a motor unit; n motor units constitute the complete primary 11.
When τ is s /τ p In the third case, the armature windings 113 belonging to two adjacent basic units 110 in the same primary 11 tooth slot are wound in the same direction; when the motor is in an odd number phase, the armature windings 113 in every k/2 continuous slots form a phase winding, and when the motor is in an even number phase, the armature windings 113 in every k continuous slots form a phase winding, and the windings belonging to the same phase have the same winding direction; a plurality of continuous armature windings 113 belonging to the same phase and adjacent tooth slots belong to the windings of other phase armature windings 113Opposite direction;
m x k continuous basic units 110 form a motor unit; n motor units constitute the complete primary 11.
If the armature windings 113 in the same primary 11 slot are in-phase windings and wound in the same direction, the same armature windings 113 are combined and considered.
Further, the exciting winding 112 and the armature winding 113 may be arranged from any one of the basic units 110 to form the primary 11 on the premise that the arrangement order is not changed.
Preferably, additional magnetic conducting teeth 114 may be added to each of the two ends of the primary 11.
Preferably, the field winding 112 and the armature winding 113 are copper or superconducting materials.
The non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor is a motor or a generator.
The motor of the invention has the following advantages:
the non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor provided by the invention has the advantages that the armature winding and the exciting winding are both arranged at the primary side, the secondary structure is simple, and the maintenance is convenient; the novel non-overlapping winding mode of the motor not only improves the counter potential amplitude, but also reduces the length of the winding end part, thereby reducing copper loss and improving the power density and the motor efficiency of the motor. When the motor is operated, the weight and the volume of the secondary are reduced, and the motor can be applied to the fields of rail transit, electromagnetic ejection and the like; when the generator is operated, the excitation adjustment is facilitated, and the power factor is adjusted.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic diagram of a motor according to an embodiment 1 of the present invention;
FIG. 2 shows a basic unit winding pattern of example 1 of the present invention;
FIG. 3 is a schematic diagram of a motor according to embodiment 2 of the present invention;
FIG. 4 is a schematic diagram of a motor according to embodiment 3 of the present invention;
fig. 5 is a schematic diagram of the motor structure according to embodiment 4 of the present invention;
fig. 6 is a schematic diagram of the motor structure according to embodiment 5 of the present invention.
The magnetic-conducting device comprises a 10-secondary, a 11-primary, a 100-secondary yoke, 101-secondary teeth, a 110-basic unit, 111-magnetic-conducting materials, 112-exciting windings, 113-armature windings and 114-additional magnetic-conducting teeth.
Detailed Description
The invention provides a non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor, which is used for enabling purposes, technical means, creation characteristics and effects of the invention to be more obvious, and is further described in detail below with reference to the accompanying drawings and specific examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention provides a non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor, which comprises a secondary 10, a primary 11, an exciting winding 112 and an armature winding 113, wherein the secondary 10, the primary 11, the exciting winding 112 and the armature winding 113 are arranged on two sides of the primary 11, and an air gap is formed between the secondary 10 and the primary 11;
according to the number of motor phases, the number of motor units and the number of armature windings connected in series, the primary 11 comprises a plurality of base units 110 connected end to end, and the base units 110 comprise 2 cross-shaped magnetic conductive materials 111; each basic unit 110 comprises 1 exciting winding 112 and 2 armature windings 113, wherein the exciting winding (112) is arranged in the middle of the basic unit (110), the armature windings (113) are arranged on two sides of the basic unit (110), and the exciting winding 112 and the armature windings 113 are wound on a primary yoke part formed by the magnetic conductive material 111.
Further, the secondary 10 has a tooth slot structure, and includes a secondary yoke 100 and secondary teeth 101.
Further, the primary 11 includes m×k×n basic units 110, m is the number of phases of the motor, k is the number of pairs of in-phase armature windings 113 connected in series in each motor unit, and n is the number of motor units;
further, the excitation windings 112 of adjacent base units 110 are wound in opposite directions;
further, the distance between the central lines of the adjacent two magnetic conducting teeth of the primary 11The separation is the primary polar distance tau p The distance between the central lines of two adjacent secondary teeth 101 of the secondary 10 is tau s The armature windings 113 are distributed according to tau s /τ p Is divided into three categories:
in a first class of this type,
in the second category of the products,
a third class of the type of the liquid,
wherein i is a natural number.
When τ is s /τ p In the first case, the windings of the armature windings 113 in the same basic unit 110 are wound in opposite directions; two adjacent armature windings 113 belonging to adjacent base units 110 are wound in opposite directions; the armature windings 113 in k consecutive base units 110 form a phase winding, m x k consecutive base units 110 form a motor unit, n motor units form the complete primary 11.
When τ is s /τ p In the second case, the armature windings 113 belonging to two adjacent basic units 110 in the same primary 11 tooth slot are wound in the same direction; when the motor is in an odd number phase, the armature windings 113 in every k/2 continuous slots form a phase winding, and when the motor is in an even number phase, the armature windings 113 in every k continuous slots form a phase winding;
wherein, the winding direction of the armature winding 113 in the tooth slot of any primary 11 is the same as the winding direction of the armature winding 113 on one side adjacent to the armature winding, and is opposite to the winding direction of the armature winding 113 on the other side adjacent to the armature winding; m x k continuous basic units 110 form a motor unit; n motor units constitute the complete primary 11.
When τ is s /τ p In the third case, the armature windings 113 belonging to two adjacent basic units 110 in the same primary 11 tooth slot are wound to the phaseSimultaneously; when the motor is in an odd number phase, the armature windings 113 in every k/2 continuous slots form a phase winding, and when the motor is in an even number phase, the armature windings 113 in every k continuous slots form a phase winding, and the windings belonging to the same phase have the same winding direction; a plurality of continuous armature windings 113 belonging to the same phase are opposite to the adjacent tooth grooves belonging to the armature windings 113 of other phases in winding direction;
m x k continuous basic units 110 form a motor unit; n motor units constitute the complete primary 11.
If the armature windings 113 in the same primary 11 slot are in-phase windings and wound in the same direction, the same armature windings 113 are combined and considered.
Further, the exciting winding 112 and the armature winding 113 may be arranged from any one of the basic units 110 to form the primary 11 on the premise that the arrangement order is not changed.
Preferably, additional magnetic conducting teeth 114 may be added to each of the two ends of the primary 11.
Preferably, the field winding 112 and the armature winding 113 are copper or superconducting materials.
The non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor is a motor or a generator.
Example 1
Referring to fig. 1, the non-overlapping winding cogging type double-sided electro-magnetic flux switching linear motor of the present invention, employing a first type of winding,
in this embodiment, m= 3,i =0, k=1, n=2, the sign is positive, and therefore the pole pitch ratio τ s /τ p Is set to 12/5. Where m is the number of phases of the motor, k is the number of pairs of in-phase armature windings 113 in series in each motor unit, and n is the number of motor units.
The non-overlapping winding tooth slot type double-side electro-magnetic flux switching linear motor comprises two single-side secondary sides 10, a primary side 11, an exciting winding 112 and an armature winding 113, wherein an air gap exists between the secondary sides 10 and the primary side 11. In this embodiment, m=3, that is, the motor in this embodiment is a three-phase motor, and is composed of A, B, C three phases. Primary 11 includes m x k x n=6 base units 110. The basic unit 110 includes two cross-shaped magnetic conductive materials 111, an exciting winding 112 is disposed in the middle of the basic unit, the exciting windings of adjacent basic units have opposite magnetic fields, armature windings 113 are disposed at two sides of the basic unit, and the windings are wound around the yoke of the basic unit. The secondary 10 is made of magnetic conductive material and is arranged on the upper side and the lower side of the primary 11; the secondary 10 has a tooth slot structure, and includes a secondary yoke 100 and secondary teeth 101.
Referring to fig. 2, the armature windings 113 in the same basic unit 110 are wound in opposite directions, k=1, that is, the armature windings 113 in the single basic unit 110 are individually one-phase windings, m=k=3 continuous basic units 110 form one motor unit, and n=2 motor units form a complete motor.
Example 2
Fig. 3 also shows a non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor. The embodiment is different from embodiment 1 in that the embodiment adopts a second type of winding, and the pole pitch ratio satisfies
In this embodiment, m=3, k=4, i=0, n=1, the sign is negative, and the pole pitch ratio τ s /τ p ＝24/11。
In this embodiment, the armature windings 113 in the same primary 11 slot are wound in the same direction, where m=3 is an odd number of phases, and each k/2=2 armature windings 113 in consecutive primary slots are in-phase windings, as A1 and A1' are in-phase in the figure. The armature winding 113 in any primary tooth slot is wound in the same direction as the adjacent armature winding 113 on one side and in the opposite direction to the adjacent armature winding 113 on the other side. The present embodiment constitutes one motor unit from m×k=12 continuous basic units 110.
Example 3
Fig. 4 is also a non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor. The embodiment is different from embodiment 1 in that the third type of windings is adopted in the embodiment, and the pole pitch ratio satisfies
In this embodiment, m=3, k=4, i=0, n=1, the sign is positive, and the pole pitch ratio τ s /τ p =48/14, i.e. τ s /τ p =24/7. In this embodiment, the winding directions of the armature windings 113 in the same primary 11 slot are the same, where m=3 is an odd number phase, and every k/2=2 armature windings 113 in consecutive primary slots are in-phase windings, and the winding directions of the armature windings 113 in the consecutive slots are the same, for example, A1 and A2, and B1 and B2 are in-phase windings and the winding directions are the same, respectively; the continuous armature windings 113 belonging to the same phase are opposite in winding direction to the armature windings 113 belonging to other phases in adjacent tooth slots, for example, A2 and B1 belong to adjacent tooth slots and are different in phase, and their winding directions are opposite. The present embodiment constitutes one motor unit from m×k=12 continuous basic units 110.
Example 4
Fig. 5 is also a non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor. The embodiment is different from embodiment 1 in that the embodiment is a four-phase motor, adopts a third type of winding, and the pole pitch ratio satisfies
In this embodiment, m=4, k=1, i=0, n=3, the sign is positive, and the pole pitch ratio τ s /τ p =16/6, i.e. τ s /τ p ＝24/9。
In this embodiment, the armature windings 113 in the same primary 11 slot are wound in the same direction, k=1, that is, the armature windings 113 in the single primary slot become one phase, m×k=4 continuous basic units 110 form one motor unit, and n=3 motor units form the whole motor.
Example 5
Fig. 6 is also a non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor. Tau of the present example and example 1 s /τ p Identical τ s /τ p =12/5. The difference between the two is that in this embodiment, additional tooth-shaped magnetic conductive materials are added at two ends of the primary structure.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor comprises a secondary (10), a primary (11), an exciting winding (112) and an armature winding (113) which are arranged on two sides of the primary (11), wherein an air gap exists between the secondary (10) and the primary (11),
according to the number of motor phases, the number of motor units and the number of armature windings connected in series, the primary (11) comprises a plurality of base units (110) which are connected end to end, and the base units (110) comprise 2 cross-shaped magnetic conductive materials (111); each basic unit (110) comprises 1 exciting winding (112) and 2 armature windings (113), wherein the exciting windings (112) are arranged in the middle of the basic unit (110), the armature windings (113) are arranged on two sides of the basic unit (110), and the exciting windings (112) and the armature windings (113) are wound on a primary yoke part formed by a magnetic conductive material (111);
the secondary (10) is of a tooth slot structure and comprises a secondary yoke (100) and secondary teeth (101).
2. The non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor of claim 1, wherein the primary (11) comprises m x k x n basic units (110), m is the number of phases of the motor, k is the number of pairs of in-phase armature windings (113) in series in each motor unit, and n is the number of motor units;
-the excitation windings (112) of adjacent base units (110) are wound in opposite directions;
the distance between the central lines of two adjacent magnetic conducting teeth of the primary (11) is tau p The distance between the central lines of two adjacent secondary teeth (101) of the secondary (10) is tau s The armature winding (113) is distributed according to tau s /τ p The differences of (a) are divided into the following three categories:
in a first class of this type,
in the second category of the products,
a third class of the type of the liquid,
wherein i is a natural number.
3. The non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor of claim 2, wherein when τ s /τ p When the first type of the situation exists, the windings of the armature windings (113) in the same basic unit (110) are wound in opposite directions; two adjacent armature windings (113) belonging to adjacent base units (110) are wound in opposite directions; the armature windings (113) in k consecutive elementary units (110) form a phase winding, m x k consecutive elementary units (110) form a motor unit, n motor units form a complete primary (11).
4. The non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor of claim 2, wherein when τ s /τ p When the two basic units (110) belong to the second class of conditions, the armature windings (113) belonging to the adjacent two basic units (110) in the same tooth slot of the primary (11) are wound in the same direction; when the motor is in odd phaseThe armature windings (113) in every k/2 continuous slots form a phase winding, and when the motor is in even number phase, the armature windings (113) in every k continuous slots form a phase winding;
wherein, the winding direction of the armature winding (113) in the tooth slot of any primary (11) is the same as the winding direction of the armature winding (113) on one side adjacent to the armature winding, and is opposite to the winding direction of the armature winding (113) on the other side adjacent to the armature winding; m x k continuous basic units (110) form a motor unit; the n motor units form a complete primary (11).
5. The non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor of claim 2, wherein when τ s /τ p In the third case, the armature windings (113) belonging to two adjacent basic units (110) in the same tooth slot of the primary (11) are wound in the same direction; when the motor is in an odd number phase, armature windings (113) in every k/2 continuous slots form a phase winding, and when the motor is in an even number phase, armature windings (113) in every k continuous slots form a phase winding, and windings belonging to the same phase have the same winding direction; a plurality of continuous armature windings (113) belonging to the same phase and adjacent tooth grooves of the continuous armature windings (113) belonging to other phases are opposite in winding direction;
m x k continuous basic units (110) form a motor unit; the n motor units form a complete primary (11).
6. The non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor of claim 4 or 5, characterized in that if the armature windings (113) of the primary (11) cogging are in-phase windings and wound in the same direction, then they are combined and considered to be the same armature winding (113).
7. The non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor of any one of claims 1 to 5, wherein the exciting winding (112) and the armature winding (113) can be arranged from any one of the basic units (110) to form the primary (11) on the premise of unchanged arrangement order.
8. The non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor of claim 7, wherein additional magnetically conductive teeth (114) are added to each of the two ends of the primary (11).
9. The non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor of claim 7, wherein the field winding (112) and armature winding (113) are copper or superconducting materials.
10. The non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor of claim 7, wherein the non-overlapping winding cogging type double sided electro-magnetic flux switching linear motor is a motor or a generator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810193201.6A CN108288905B (en) | 2018-03-07 | 2018-03-07 | Non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor |
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| CN201810193201.6A CN108288905B (en) | 2018-03-07 | 2018-03-07 | Non-overlapping winding tooth slot type bilateral electro-magnetic flux switching linear motor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012175851A (en) * | 2011-02-23 | 2012-09-10 | Yaskawa Electric Corp | Linear motor armature and linear motor |
| CN103296857A (en) * | 2013-06-24 | 2013-09-11 | 南京航空航天大学 | Double-edge staggered teeth flat type flux switching permanent magnet linear motor |
| CN103633812A (en) * | 2013-11-18 | 2014-03-12 | 江苏大学 | Modular bilateral magnetic flux switching permanent magnet linear motor |
| CN105391260A (en) * | 2015-11-16 | 2016-03-09 | 江苏大学 | Double-stator permanent-magnetic cursor linear motor and design method for increasing magnetic field modulation effect |
-
2018
- 2018-03-07 CN CN201810193201.6A patent/CN108288905B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012175851A (en) * | 2011-02-23 | 2012-09-10 | Yaskawa Electric Corp | Linear motor armature and linear motor |
| CN103296857A (en) * | 2013-06-24 | 2013-09-11 | 南京航空航天大学 | Double-edge staggered teeth flat type flux switching permanent magnet linear motor |
| CN103633812A (en) * | 2013-11-18 | 2014-03-12 | 江苏大学 | Modular bilateral magnetic flux switching permanent magnet linear motor |
| CN105391260A (en) * | 2015-11-16 | 2016-03-09 | 江苏大学 | Double-stator permanent-magnetic cursor linear motor and design method for increasing magnetic field modulation effect |
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