CN116914968A - Motor coil winding structure, wire connection and disconnection method and three-phase low-speed motor - Google Patents
Motor coil winding structure, wire connection and disconnection method and three-phase low-speed motor Download PDFInfo
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- CN116914968A CN116914968A CN202311171633.4A CN202311171633A CN116914968A CN 116914968 A CN116914968 A CN 116914968A CN 202311171633 A CN202311171633 A CN 202311171633A CN 116914968 A CN116914968 A CN 116914968A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000004020 conductor Substances 0.000 description 4
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- 238000004519 manufacturing process Methods 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0056—Manufacturing winding connections
- H02K15/0068—Connecting winding sections; Forming leads; Connecting leads to terminals
- H02K15/0081—Connecting winding sections; Forming leads; Connecting leads to terminals for form-wound windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/08—Forming windings by laying conductors into or around core parts
- H02K15/085—Forming windings by laying conductors into or around core parts by laying conductors into slotted stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
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Abstract
The invention provides a motor coil winding structure, a wire-connecting method and a three-phase low-speed motor, and relates to the technical field of motors. The motor coil winding structure is used for the 105-slot 14-pole three-phase low-speed asynchronous motor, and by adopting double-layer winding arrangement, non-sequential wiring and star connection, 105-branch coils can be uniformly distributed, the running stability and efficiency of the motor are improved, the harmonic content of the motor is reduced, the motor is convenient to start stably, the loss and temperature rise of the winding can be reduced, enough torque can be provided, and the like, and the comprehensive performance indexes such as the power factor, the torque multiple and the efficiency of the three-phase low-speed motor can be effectively improved, and the motor loss and the like are reduced.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a motor coil winding structure, a wire-connecting method and a three-phase low-speed motor.
Background
In a traditional 105-slot 14-pole three-phase low-speed asynchronous motor, the wiring and the off-line of a winding coil usually adopt a lap winding sequential wiring mode; the sequential wiring is to sequentially wire the stator coils of each phase one by one so as to control the correct trend of the current, thereby realizing the output and rotation functions of the motor through the sequential wiring of the three-phase coils.
However, the 105-slot 14-pole three-phase low-speed asynchronous motor adopting the lap winding sequential wiring generally has the problems that the overall winding coefficient of the motor is low, the capability of winding coils cannot be fully exerted, the generated motor has high impurity consumption, low fundamental electromotive force and the like, and the problems can cause the corresponding negative influence on comprehensive performance indexes such as the efficiency, the power factor, the starting torque, the stator temperature rise and the like of the motor, and the corresponding use requirements of customers and the like are difficult to meet.
Disclosure of Invention
The invention solves the problems that: and improving the comprehensive performance index of the 105-slot 14-pole three-phase low-speed asynchronous motor.
In order to solve the problems, the invention provides a motor coil winding structure, which comprises a double-layer winding with a span of 14 slots, wherein the double-layer winding is arranged in 105 stator slots of a motor, the double-layer winding comprises a U-phase winding, a V-phase winding and a W-phase winding, the U-phase winding comprises a first branch and a second branch, the V-phase winding comprises a third branch and a fourth branch, and the W-phase winding comprises a fifth branch and a sixth branch; the first branch comprises the 1 st, 2 nd, 3 rd, 16 th, 17 th, 18 th, 31 st, 33 th, 46 th, 48 th, 61 th, 63 th, 76 th, 78 th, 91 th, 93 th, 100 th, 99 th branch loops, the second branch comprises the 25 th, 24 th, 10 th, 9 th, 32 th, 40 th, 39 th, 47 th, 55 th, 54 th, 62 th, 70 th, 69 th, 77 th, 85 th, 84 th, 92 th loops, the third branch comprises the 36 th, 37 th, 38 th, 51 th, 52 th, 53 th, 66 th, 68 th, 81 th, 83 th, 96 th, 98 th, 6 th, 8 th, 21 st, 23 th, 30 th, 29 th loops, the fourth branch comprises sequentially connected 60 th, 59, 45, 44, 67, 75, 74, 82, 90, 89, 97, 105, 104, 7, 15, 14 and 22 th branch, the fifth branch comprises sequentially connected 71 th, 72, 73, 86, 87, 88, 101, 103, 11, 13, 26, 28, 41, 43, 56, 58, 65 and 64 th branch, and the sixth branch comprises sequentially connected 95 th, 94 th, 80, 79, 102, 5,4, 12, 20, 19, 27, 35, 34, 42, 50, 49 and 57 th branch;
the 25 th coil is connected with the 1 st coil, the 60 th coil is connected with the 36 th coil, the 95 th coil is connected with the 71 st coil, the 99 th coil, the 29 th coil are connected with the 64 th coil, and the 92 th coil, the 22 nd coil are connected with the 57 th coil; or, the 25 th branch coil is connected with the 99 th branch coil, the 60 th branch coil is connected with the 29 th branch coil, the 95 th branch coil is connected with the 64 th branch coil, and the 92 th branch coil, the 22 nd branch coil are connected with the 57 th branch coil.
Optionally, the U-phase winding, the V-phase winding and the W-phase winding are each provided with 14 poles.
Optionally, the nominal frequency of the motor coil winding structure is 50Hz.
Optionally, the number of windings of each coil is equal.
Optionally, the motor coil winding structure further comprises insulating paper disposed between the active sides of different ones of the coils in the stator slots.
In order to solve the above-mentioned problems, the present invention further provides a wire-down method for the above-mentioned motor coil winding structure, comprising:
winding a coil of the motor coil winding structure;
embedding 105 coils into 105 stator slots of the motor;
respectively connecting the first branch and the second branch of the U-phase winding of the motor coil winding structure, respectively connecting the third branch and the fourth branch of the V-phase winding of the motor coil winding structure, and respectively connecting the fifth branch and the sixth branch of the W-phase winding of the motor coil winding structure;
and wiring among the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch is conducted.
Optionally, the winding of the wound motor coil winding structure includes:
and winding each coil with a first preset number of turns.
Optionally, the wiring of the first branch of the U-phase winding of the motor coil winding structure includes:
the 1 st, 2 nd, 3 rd, 16 th, 17 th, 18 th, 31 th, 33 th, 46 th, 48 th, 61 th, 63 th, 76 th, 78 th, 91 th, 93 th, 100 th and 99 th coils are connected in series in turn;
the wiring of the second branch of the U-phase winding of the motor coil winding structure includes:
sequentially connecting the 25 th, 24 th, 10 th, 9 th, 32 th, 40 th, 39 th, 47 th, 55 th, 54 th, 62 th, 70 th, 69 th, 77 th, 85 th, 84 th and 92 th coils in series;
the wiring of the third branch of the V-phase winding of the motor coil winding structure includes:
36 th, 37 th, 38 th, 51 th, 52 th, 53 th, 66 th, 68 th, 81 th, 83 th, 96 th, 98 th, 6 th, 8 th, 21 th, 23 th, 30 th and 29 th coils are connected in series in sequence;
the wiring of the fourth branch of the V-phase winding of the motor coil winding structure includes:
60 th, 59 th, 45 th, 44 th, 67 th, 75 th, 74 th, 82 th, 90 th, 89 th, 97 th, 105 th, 104 th, 7 th, 15 th, 14 th and 22 th coils are connected in series in sequence;
the wiring of the fifth branch of the W-phase winding of the motor coil winding structure includes:
71, 72, 73, 86, 87, 88, 101, 103, 11, 13, 26, 28, 41, 43, 56, 58, 65, 64 coils are sequentially connected in series;
the wiring of the sixth branch of the W-phase winding of the motor coil winding structure includes:
the 95 th, 94 th, 80 th, 79 th, 102 th, 5 th, 4 th, 12 th, 20 th, 19 th, 27 th, 35 th, 34 th, 42 th, 50 th, 49 th and 57 th coils are connected in series in turn.
Optionally, the performing the wiring between the first branch, the second branch, the third branch, the fourth branch, the fifth branch, and the sixth branch includes:
connecting one end of the first branch with the second branch, one end of the third branch with the fourth branch, one end of the fifth branch with the sixth branch, the other end of the first branch and the other end of the third branch with the other end of the fifth branch, and the other end of the second branch and the other end of the fourth branch with the other end of the sixth branch; or, the first branch is connected in series with the second branch, the third branch is connected in series with the fourth branch, the fifth branch is connected in series with the sixth branch, and the second branch is far away from one end connected with the first branch, the fourth branch is far away from one end connected with the third branch, and the sixth branch is far away from one end connected with the fifth branch.
In order to solve the problems, the invention also provides a three-phase low-speed motor, which comprises the motor coil winding structure.
Compared with the prior art, the invention has the following beneficial effects: the motor coil winding structure is used for a 105-slot 14-pole three-phase low-speed asynchronous motor, and by adopting a motor coil winding structure which is arranged by double-layer windings, is in non-sequential wiring and is in star connection, on one hand, 105 branch coils in total of the three-phase windings of the motor coil winding structure can be uniformly distributed in a stator slot, the running stability, the efficiency and the like of the motor are improved, the harmonic distortion of the motor can be reduced, the harmonic content and the like of the motor can be reduced; on the other hand, the motor is convenient for stable starting, the loss and the temperature rise of the winding can be reduced, and enough torque can be provided; on the other hand, the comprehensive performance indexes such as the power factor, the torque multiple, the efficiency and the like of the three-phase low-speed motor can be effectively improved, and the motor loss (such as the power consumption loss and the like) and the like can be reduced.
Drawings
FIG. 1 is a schematic diagram of a motor coil winding structure according to an embodiment of the present invention using a double star connection;
FIG. 2 is a schematic diagram of a motor coil winding structure according to an embodiment of the present invention using star connection;
fig. 3 is a flowchart of a method for connecting a wire down in an embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
Referring to fig. 1 and 2, an embodiment of the present invention provides a winding structure of a motor coil, including a double-layer winding with a span of 14 slots among 105 stator slots of the motor, where the double-layer winding includes a U-phase winding, a V-phase winding, and a W-phase winding, the U-phase winding includes a first branch and a second branch, the V-phase winding includes a third branch and a fourth branch, and the W-phase winding includes a fifth branch and a sixth branch; the first branch comprises the 1 st, 2 nd, 3 rd, 16 th, 17 th, 18 th, 31 st, 33 th, 46 th, 48 th, 61 th, 63 th, 76 th, 78 th, 91 st, 93 th, 100 th and 99 th coils which are connected in sequence, the second branch comprises the 25 th, 24 th, 10 th, 9 th, 32 th, 40 th, 39 th, 47 th, 55 th, 54 th, 62 th, 70 th, 69 th, 77 th, 85 th, 84 th and 92 th coils which are connected in sequence, the third branch comprises the 36 th, 37 th, 38 th, 51 th, 52 th, 53 th, 66 th, 68 th, 81 th, 83 th, 96 th, 98 th, 8 th, 21 th, 23 th, 30 th and 29 th coils which are connected in sequence, the fourth branch comprises sequentially connected 60 th, 59 th, 45 th, 44 th, 67 th, 75 th, 74 th, 82 th, 90 th, 89 th, 97 th, 105 th, 104 th, 7 th, 15 th, 14 th and 22 th coils, the fifth branch comprises sequentially connected 71 th, 72 th, 73 th, 86 th, 87 th, 88 th, 101 th, 103 th, 11 th, 13 th, 26 th, 28 th, 41 th, 43 th, 56 th, 58 th, 65 th and 64 th coils, and the sixth branch comprises sequentially connected 95 th, 94 th, 80 th, 79 th, 102 th, 5 th, 4 th, 12 th, 20 th, 19 th, 27 th, 35 th, 34 th, 42 th, 50 th, 49 th and 57 th coils;
the 25 th coil is connected with the 1 st coil, the 60 th coil is connected with the 36 th coil, the 95 th coil is connected with the 71 st coil, the 99 th coil, the 29 th coil are connected with the 64 th coil, and the 92 th coil, the 22 nd coil are connected with the 57 th coil; or, the 25 th coil is connected with the 99 th coil, the 60 th coil is connected with the 29 th coil, the 95 th coil is connected with the 64 th coil, and the 92 th coil, the 22 nd coil are connected with the 57 th coil.
In this embodiment, the motor coil winding structure is used for a three-phase low-speed motor with 105 stator slots and 14 poles (7 pole pairs), and uses the span of the 14 slots to perform winding (U-phase winding, V-phase winding and W-phase winding) to form a lower line (coil inserting) of 105 branch coils in the stator slots, so as to form a double-layer winding, that is, two effective sides of one coil are embedded in the stator slots of two 14 slots at intervals, and two effective sides of two coils are embedded in each stator slot, so as to form an upper layer side and a lower layer side, thus ensuring that 105 branch coils in total of the three-phase winding (U-phase winding, V-phase winding and W-phase winding) of the motor coil winding structure can be uniformly distributed in the stator slots, on one hand, so as to help reduce cogging and magnetic field non-uniformity of the motor, reduce noise and vibration of the motor, improve operation stability and efficiency of the motor, and the like; on the other hand, the harmonic distortion of the motor is reduced, the harmonic content of the motor is reduced, and the like.
For the specific arrangement position of 105 coils in 105 stator slots of the winding, the 105 stator slots are sequentially defined as a first slot and a second slot … … first hundred and zero five slots along the clockwise and anticlockwise directions, and the first slot is adjacent to the first hundred and zero five slots. Setting 105 coils in 105 stator slots from small to large along the sequence of the stator slots, finishing setting 105 coils in 105 stator slots, wherein the coils with two effective sides respectively arranged in a first slot and a sixteenth slot are marked as 1 st coil, the coils with two effective sides respectively arranged in a second slot and a seventeenth slot are marked as 2 nd coil, … …, the coils with two effective sides respectively arranged in a nineteenth slot and a first hundred and five slot are marked as 90 th coil, … …, and the coils with two effective sides respectively arranged in the first hundred and five slot and the fifteenth slot are marked as 105 th coil. In the motor coil winding structure, each phase winding is provided with 35 coils; the last two coils of the first branch, the third branch and the fifth branch (99 th and 100 th coils of the first branch, 29 th and 30 th coils of the third branch and 64 th and 65 th coils of the fifth branch) are connected in a non-sequence manner; the partial coils of the second, fourth and sixth branches (9, 10, 24, 25, 39, 40, 54, 55, 69, 70, 84, 85 coils of the second branch, 44, 45, 59, 60, 74, 75, 89, 90, 104, 105, 14, 15 coils of the fourth branch, 79, 80, 94, 95,4, 5, 19, 20, 34, 35, 49, 50 coils of the sixth branch) are wired non-sequentially. Specifically, each branch coil has two connectors (or terminals) through which it is connected to the other coils or to the corresponding power terminals; taking one end of the 1 st coil extending from the first slot as a starting end, sequentially connecting the 2 nd, 3 rd, 16 th, 17 th, 18 th, 31 th, 33 th, 46 th, 48 th, 61 th, 63 th, 76 th, 78 th, 91 th and 93 th coils through the other end of the 1 st coil extending from the sixteenth slot, reversely connecting the 100 th and 99 th coils, namely connecting one end of the 93 th coil far from the 91 st coil to one end of the 100 th coil, connecting one end of the 100 th coil far from the 93 th coil to one end of the 99 th coil, and connecting the other end of the 99 th coil to the terminal to form a first branch of a U-phase winding, wherein the corresponding starting end and the terminal serve as two terminals of the first branch; similarly, the 25 th coil is used as the starting end of the second branch, and sequentially connected with the 25 th, 24 th, 10 th, 9 th, 32 th, 40 th, 39 th, 47 th, 55 th, 54 th, 62 th, 70 th, 69 th, 77 th, 85 th, 84 th and 92 th coils, and the 92 th coil is used as the terminal end of the second branch; the 36 th branch is used as the starting end of the third branch, and sequentially connected with 36 th, 37 th, 38 th, 51 th, 52 th, 53 th, 66 th, 68 th, 81 th, 83 th, 96 th, 98 th, 6 th, 8 th, 21 th, 23 th, 30 th and 29 th coils, and the 29 th branch is used as the terminal end of the third branch; the 60 th branch coil is used as the starting end of the fourth branch and sequentially connected with the 60 th, 59 th, 45 th, 44 th, 67 th, 75 th, 74 th, 82 th, 90 th, 89 th, 97 th, 105 th, 104 th, 7 th, 15 th, 14 th and 22 th coils, and the 22 th branch coil is used as the terminal end of the fourth branch; the 71 st branch is used as the starting end of the fifth branch and sequentially connected with the 71 st, 72 nd, 73 nd, 86 nd, 87 th, 88 th, 101 nd, 103 nd, 11 th, 13 th, 26 th, 28 th, 41 nd, 43 nd, 56 th, 58 th, 65 th and 64 th coils, and the 64 th branch is used as the terminal end of the fifth branch; the 95 th branch coil is used as the starting end of the sixth branch and sequentially connected with the 95 th, 94 th, 80 th, 79 th, 102 th, 5 th, 4 th, 12 th, 20 th, 19 th, 27 th, 35 th, 34 th, 42 th, 50 th, 49 th and 57 th coils, and the 57 th branch coil is used as the terminal end of the sixth branch. In some embodiments, adjacent coils of each branch need opposite currents to realize the arrangement of corresponding magnetic poles; the coil inserting of each coil in the corresponding stator slot can be inserted, so that the convenience of connection between coils of each phase winding is improved.
Compared with the triangular connection, the three-phase low-speed motor has the following advantages that: the star connection generally only needs lower starting current when starting at low speed, reduces impact on a power grid, and is beneficial to stable starting; the star connection distributes the current of the motor to a plurality of windings, thereby reducing the current of each winding and helping to reduce the loss and temperature rise of the windings; the star connection can provide a relatively high winding voltage, which can help the motor overcome the resistance inside the motor and provide sufficient torque at low speeds; the star-shaped connection structure is relatively simple, and has good heat dissipation performance and the like. Therefore, in the motor coil winding structure, star connection is preferably adopted. Specifically, the first branch is connected in series with the second branch, the third branch is connected in series with the fourth branch, the fifth branch is connected in series with the sixth branch, and then the U-phase winding, the V-phase winding and the W-phase winding are connected in a star shape; illustratively, as shown in fig. 2 (the numbers in the figures correspond to the corresponding numbered coils), the 25 th coil is connected with the 99 th coil, the 60 th coil is connected with the 29 th coil, the 95 th coil is connected with the 64 th coil, and the 92 th coil, the 22 nd coil are connected with the 57 th coil. Or, as shown in fig. 1 (the numbers in the figure correspond to the coils with corresponding serial numbers), the first branch, the third branch and the fifth branch are in star connection, and the second branch, the fourth branch and the sixth branch are in star connection to form double star connection; illustratively, the 25 th coil is connected with the 1 st coil, the 60 th coil is connected with the 36 th coil, the 95 th coil is connected with the 71 st coil, and the 99 th coil, the 29 th coil is connected with the 64 th coil, and the 92 th coil, the 22 nd coil are connected with the 57 th coil.
The following is a three-phase low-speed motor (hereinafter referred to as motor coil winding structure) using the above-mentioned stator slot 105, pole pair number 7, double star connection and non-sequential wiring motor coil winding structure, and a three-phase low-speed asynchronous motor (hereinafter referred to as existing structure) using 105 stator slots, 14 poles and lap winding sequential wiring in the prior art, operating at rated 50Hz, and comparing the data table (including calculated value/design value/predicted value and measured value) obtained by experiment:
compared with the existing structure, the motor coil winding structure can effectively improve the power factor, torque multiple, efficiency and the like of the three-phase low-speed motor, reduce motor loss (such as power consumption loss and the like) and the like, and greatly improve the comprehensive performance index of the motor in rated operation.
In this way, the motor coil winding structure is used for the 105-slot 14-pole three-phase low-speed asynchronous motor, and by adopting a double-layer winding arrangement, non-sequential wiring and star connection motor coil winding structure, on one hand, 105 branch coils of the three-phase winding of the motor coil winding structure can be uniformly distributed in a stator slot, the running stability, the running efficiency and the like of the motor are improved, the harmonic distortion of the motor can be reduced, the harmonic content and the like of the motor can be reduced; on the other hand, the motor is convenient for stable starting, the loss and the temperature rise of the winding can be reduced, and enough torque can be provided; on the other hand, the comprehensive performance indexes such as the power factor, the torque multiple, the efficiency and the like of the three-phase low-speed motor can be effectively improved, and the motor loss (such as the power consumption loss and the like) and the like can be reduced.
Optionally, the U-phase winding, the V-phase winding and the W-phase winding are each provided with 14 poles.
In the embodiment, in order to meet the corresponding rotation speed requirement of the three-phase low-speed motor, the rated rotation speed (nN) is about 422 r/min; at a nominal frequency f of 50Hz, according to the formula n=60 f (1-s)/p, where n is the rotational speed, s is the slip and p is the pole pair number, the pole pair number p to be set for each phase winding of the motor coil winding structure is about 7 (i.e. 14 poles). Accordingly, according to q=z/(2 pm), where q is the number of slots per pole per phase, Z is the total number of stator slots, and m is the number of phases, it is available that the number of slots per pole per phase is the fractional slot 2.
Alternatively, the nominal frequency of the motor coil winding structure is 50Hz.
In this embodiment, in order to improve the application range of the three-phase low-speed motor adopting the motor coil winding structure, the rated frequency of the motor coil winding structure is set to be 50Hz, so as to ensure the normal use of the motor coil winding structure when power is supplied through a power grid or the like. Wherein the setting of the rated frequency is related to electromagnetic characteristics of windings and the like.
Optionally, the number of turns of each coil is equal.
In this embodiment, the number of windings of each coil is equal, that is, each coil is formed by winding a certain number of windings of the corresponding conductor, and the number of windings is the number of conductors of the corresponding coil in the stator slot. Illustratively, when the number of conductors in each stator slot is 22, that is, the number of conductors of the effective sides of the two coils disposed in each stator slot is added to 22, the number of turns of winding of each coil is 22/2=11.
Optionally, the motor coil winding structure further comprises insulating paper disposed between the active edges of the different coils in the stator slots.
In this embodiment, since the effective sides of the two coils layered up and down are provided in each stator slot, in order to avoid a short circuit between the two coils, insulating paper is preferably provided between the effective sides of the different coils in the stator slot, so as to perform an insulating function.
Referring to fig. 3, another embodiment of the present invention provides a wire-down method for the above-mentioned motor coil winding structure, including:
step 100, winding a coil of a motor coil winding structure;
step 200, embedding 105 coils into 105 stator slots of a motor;
step 300, respectively connecting the first branch and the second branch of the U-phase winding of the motor coil winding structure, respectively connecting the third branch and the fourth branch of the V-phase winding of the motor coil winding structure, and respectively connecting the fifth branch and the sixth branch of the W-phase winding of the motor coil winding structure;
step 400, wiring is performed among the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch.
In particular, to ensure controllability of the coil manufacturing process and to facilitate testing and maintenance of the coil, it is preferable to wind the stator coil in advance in step 100, unlike winding the coil directly on the stator by manual or mechanical work. Thereafter, a down-winding (insertion) is performed by step 200, i.e., the previously wound stator coils are inserted into 105 stator slots of the motor stator. Then, through step 300, the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch are respectively connected. Finally, the connections between the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch are made, for example, such that the above-described star connection is realized.
Therefore, by adopting the wire-connecting method for the motor coil winding structure, the wire-connecting of the motor coil winding structure can be ensured to be carried out stably and orderly, and the production and manufacturing efficiency, quality and the like of the motor coil winding structure are improved.
Optionally, step 100 includes:
and winding each coil with a first preset number of turns.
Specifically, corresponding parameters of the required motor coil winding structure, such as the number of turns (recorded as a first preset number of turns), the span, etc., of each coil are determined according to the user requirement or the design requirement, and then the coil is wound manually or mechanically according to the first preset number of turns, the corresponding span, etc., so as to obtain the stator coil meeting the requirement.
Optionally, the wiring of the first branch of the U-phase winding of the motor coil winding structure comprises:
the 1 st, 2 nd, 3 rd, 16 th, 17 th, 18 th, 31 th, 33 th, 46 th, 48 th, 61 th, 63 th, 76 th, 78 th, 91 th, 93 th, 100 th and 99 th coils are connected in series in turn;
the wiring of the second branch of the U-phase winding of the motor coil winding structure includes:
sequentially connecting the 25 th, 24 th, 10 th, 9 th, 32 th, 40 th, 39 th, 47 th, 55 th, 54 th, 62 th, 70 th, 69 th, 77 th, 85 th, 84 th and 92 th coils in series;
the wiring of the third branch of the V-phase winding of the motor coil winding structure includes:
36 th, 37 th, 38 th, 51 th, 52 th, 53 th, 66 th, 68 th, 81 th, 83 th, 96 th, 98 th, 6 th, 8 th, 21 th, 23 th, 30 th and 29 th coils are connected in series in sequence;
the wiring of the fourth branch of the V-phase winding of the motor coil winding structure includes:
60 th, 59 th, 45 th, 44 th, 67 th, 75 th, 74 th, 82 th, 90 th, 89 th, 97 th, 105 th, 104 th, 7 th, 15 th, 14 th and 22 th coils are connected in series in sequence;
the wiring of the fifth branch of the W-phase winding of the motor coil winding structure includes:
71, 72, 73, 86, 87, 88, 101, 103, 11, 13, 26, 28, 41, 43, 56, 58, 65, 64 coils are sequentially connected in series;
the wiring of the sixth branch of the W-phase winding of the motor coil winding structure includes:
the 95 th, 94 th, 80 th, 79 th, 102 th, 5 th, 4 th, 12 th, 20 th, 19 th, 27 th, 35 th, 34 th, 42 th, 50 th, 49 th and 57 th coils are connected in series in turn.
Specifically, in step 300, the coils in the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch are respectively wired in series and non-sequentially, so as to obtain the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch which meet the requirements.
Optionally, step 400 includes:
one end of the first branch is connected with the second branch, one end of the third branch is connected with the fourth branch, one end of the fifth branch is connected with the sixth branch, the other end of the first branch and the other end of the third branch are connected with the other end of the fifth branch, and the other end of the second branch and the other end of the fourth branch are connected with the other end of the sixth branch; or, the first branch is connected in series with the second branch, the third branch is connected in series with the fourth branch, the fifth branch is connected in series with the sixth branch, and the second branch is far away from the end connected with the first branch, the fourth branch is far away from the end connected with the third branch, and the sixth branch is far away from the end connected with the fifth branch.
In particular, the use of a star connection based on a three-phase low-speed motor has the following advantages: the star connection generally only needs lower starting current when starting at low speed, reduces impact on a power grid, and is beneficial to stable starting; the star connection distributes the current of the motor to a plurality of windings, thereby reducing the current of each winding and helping to reduce the loss and temperature rise of the windings; the star connection can provide a relatively high winding voltage, which can help the motor overcome the resistance inside the motor and provide sufficient torque at low speeds; the star-shaped connection structure is relatively simple, and has good heat dissipation performance and the like. Therefore, when the method is used for the wire connection of the motor coil winding structure, star connection is preferably adopted; specifically, the first branch, the third branch and the fifth branch are in star connection, and the second branch, the fourth branch and the sixth branch are in star connection to form double star connection; illustratively, the 25 th coil is connected with the 1 st coil, the 60 th coil is connected with the 36 th coil, the 95 th coil is connected with the 71 st coil, and the 99 th coil, the 29 th coil is connected with the 64 th coil, and the 92 th coil, the 22 nd coil are connected with the 57 th coil. Or the first branch is connected in series with the second branch, the third branch is connected in series with the fourth branch, the fifth branch is connected in series with the sixth branch, and then the U-phase winding, the V-phase winding and the W-phase winding are connected in a star shape; illustratively, the 25 th coil is connected with the 99 th coil, the 60 th coil is connected with the 29 th coil, the 95 th coil is connected with the 64 th coil, and the 92 th coil, the 22 nd coil are connected with the 57 th coil.
Another embodiment of the present invention provides a three-phase low-speed motor, including the above-described motor coil winding structure.
In the embodiment, the 105-slot 14-pole three-phase low-speed motor adopts the motor coil winding structure, and particularly adopts a double-layer winding arrangement, non-sequential wiring and star-connection motor coil winding structure, so that 105 coils in total of the three-phase winding of the motor coil winding structure can be uniformly distributed in a stator slot, the running stability, the running efficiency and the like of the motor are improved, the harmonic distortion of the motor can be reduced, and the harmonic content and the like of the motor are reduced; on the other hand, the motor is convenient for stable starting, the loss and the temperature rise of the winding can be reduced, and enough torque can be provided; on the other hand, the comprehensive performance indexes such as the power factor, the torque multiple, the efficiency and the like of the three-phase low-speed motor can be effectively improved, and the motor loss (such as the power consumption loss and the like) and the like can be reduced.
Although the invention is disclosed above, the scope of the invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications will fall within the scope of the invention.
Claims (10)
1. The motor coil winding structure is characterized by comprising a double-layer winding with a span of 14 slots, wherein the double-layer winding is arranged in 105 stator slots of a motor and comprises a U-phase winding, a V-phase winding and a W-phase winding, the U-phase winding comprises a first branch and a second branch, the V-phase winding comprises a third branch and a fourth branch, and the W-phase winding comprises a fifth branch and a sixth branch; the first branch comprises the 1 st, 2 nd, 3 rd, 16 th, 17 th, 18 th, 31 st, 33 th, 46 th, 48 th, 61 th, 63 th, 76 th, 78 th, 91 th, 93 th, 100 th, 99 th branch loops, the second branch comprises the 25 th, 24 th, 10 th, 9 th, 32 th, 40 th, 39 th, 47 th, 55 th, 54 th, 62 th, 70 th, 69 th, 77 th, 85 th, 84 th, 92 th loops, the third branch comprises the 36 th, 37 th, 38 th, 51 th, 52 th, 53 th, 66 th, 68 th, 81 th, 83 th, 96 th, 98 th, 6 th, 8 th, 21 st, 23 th, 30 th, 29 th loops, the fourth branch comprises sequentially connected 60 th, 59, 45, 44, 67, 75, 74, 82, 90, 89, 97, 105, 104, 7, 15, 14 and 22 th branch, the fifth branch comprises sequentially connected 71 th, 72, 73, 86, 87, 88, 101, 103, 11, 13, 26, 28, 41, 43, 56, 58, 65 and 64 th branch, and the sixth branch comprises sequentially connected 95 th, 94 th, 80, 79, 102, 5,4, 12, 20, 19, 27, 35, 34, 42, 50, 49 and 57 th branch;
the 25 th coil is connected with the 1 st coil, the 60 th coil is connected with the 36 th coil, the 95 th coil is connected with the 71 st coil, the 99 th coil, the 29 th coil are connected with the 64 th coil, and the 92 th coil, the 22 nd coil are connected with the 57 th coil; or, the 25 th branch coil is connected with the 99 th branch coil, the 60 th branch coil is connected with the 29 th branch coil, the 95 th branch coil is connected with the 64 th branch coil, and the 92 th branch coil, the 22 nd branch coil are connected with the 57 th branch coil.
2. The motor coil winding structure according to claim 1, wherein the U-phase winding, the V-phase winding, and the W-phase winding are each provided with 14 poles.
3. The motor coil winding structure of claim 1 wherein the rated frequency of the motor coil winding structure is 50Hz.
4. A motor coil winding structure according to any one of claims 1 to 3, wherein the number of turns of each of said coils is equal.
5. A motor coil winding structure according to any one of claims 1 to 3, further comprising insulating paper disposed between active edges of different ones of said coils in said stator slots.
6. A wire-down method for the motor coil winding structure according to any one of claims 1 to 5, comprising:
winding a coil of the motor coil winding structure;
embedding 105 coils into 105 stator slots of the motor;
respectively connecting the first branch and the second branch of the U-phase winding of the motor coil winding structure, respectively connecting the third branch and the fourth branch of the V-phase winding of the motor coil winding structure, and respectively connecting the fifth branch and the sixth branch of the W-phase winding of the motor coil winding structure;
and wiring among the first branch, the second branch, the third branch, the fourth branch, the fifth branch and the sixth branch is conducted.
7. The method of winding up of claim 6, wherein the winding of the wound motor coil structure comprises:
and winding each coil with a first preset number of turns.
8. The method of winding down as defined in claim 6, wherein said performing the wiring of the first leg of the U-phase winding of the motor coil winding structure comprises:
the 1 st, 2 nd, 3 rd, 16 th, 17 th, 18 th, 31 th, 33 th, 46 th, 48 th, 61 th, 63 th, 76 th, 78 th, 91 th, 93 th, 100 th and 99 th coils are connected in series in turn;
the wiring of the second branch of the U-phase winding of the motor coil winding structure includes:
sequentially connecting the 25 th, 24 th, 10 th, 9 th, 32 th, 40 th, 39 th, 47 th, 55 th, 54 th, 62 th, 70 th, 69 th, 77 th, 85 th, 84 th and 92 th coils in series;
the wiring of the third branch of the V-phase winding of the motor coil winding structure includes:
36 th, 37 th, 38 th, 51 th, 52 th, 53 th, 66 th, 68 th, 81 th, 83 th, 96 th, 98 th, 6 th, 8 th, 21 th, 23 th, 30 th and 29 th coils are connected in series in sequence;
the wiring of the fourth branch of the V-phase winding of the motor coil winding structure includes:
60 th, 59 th, 45 th, 44 th, 67 th, 75 th, 74 th, 82 th, 90 th, 89 th, 97 th, 105 th, 104 th, 7 th, 15 th, 14 th and 22 th coils are connected in series in sequence;
the wiring of the fifth branch of the W-phase winding of the motor coil winding structure includes:
71, 72, 73, 86, 87, 88, 101, 103, 11, 13, 26, 28, 41, 43, 56, 58, 65, 64 coils are sequentially connected in series;
the wiring of the sixth branch of the W-phase winding of the motor coil winding structure includes:
the 95 th, 94 th, 80 th, 79 th, 102 th, 5 th, 4 th, 12 th, 20 th, 19 th, 27 th, 35 th, 34 th, 42 th, 50 th, 49 th and 57 th coils are connected in series in turn.
9. The method of wire-down of claim 6, wherein the making the wire connection between the first leg, the second leg, the third leg, the fourth leg, the fifth leg, and the sixth leg comprises:
connecting one end of the first branch with the second branch, one end of the third branch with the fourth branch, one end of the fifth branch with the sixth branch, the other end of the first branch and the other end of the third branch with the other end of the fifth branch, and the other end of the second branch and the other end of the fourth branch with the other end of the sixth branch; or, the first branch is connected in series with the second branch, the third branch is connected in series with the fourth branch, the fifth branch is connected in series with the sixth branch, and the second branch is far away from one end connected with the first branch, the fourth branch is far away from one end connected with the third branch, and the sixth branch is far away from one end connected with the fifth branch.
10. A three-phase low-speed motor comprising the motor coil winding structure according to any one of claims 1 to 5.
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| RU2077103C1 (en) * | 1992-04-13 | 1997-04-10 | Волжский инженерно-педагогический институт | Combined stator winding |
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