CN108649727A - Two pole hollow-cup motor loop constructions of one kind and its winding method - Google Patents

Abstract

The invention discloses a coil structure of a two-pole hollow cup motor, which includes: a cylindrical coil that is sheathed outside a magnetic steel, and is characterized in that the cylindrical coil includes three coil groups, and any coil group only Wound by one wire and only includes one wire inlet and one wire outlet, the cylindrical coil is wound into a frameless hollow cylindrical coil by winding wires of three coil groups. The arrangement structure of the present invention satisfies the distributed winding structure of full pitch and full slot, so as to maximize the power density of the motor. It has symmetry in the electromagnetic structure, full-pitch integer winding arrangement, and only six lead-out wire ends. The structure is simple and easy to manufacture, the power density of the motor is maximized and the process is simple with fewer wire ends, which makes the production more efficient.

Description

Coil structure and winding method of a two-pole hollow cup motor

technical field

The invention belongs to the technical field of motors, in particular to a coil structure of a two-pole hollow cup motor and a winding method thereof.

Background technique

The coreless motor belongs to the type of miniature permanent magnet motor. Its special structure is that the coil winding is a self-supporting hollow cylindrical structure with no skeleton enameled wire. The performance parameters of the motor formed by this special structure are the highest power density and highest efficiency of all kinds of motors of the same specification. Type, it has irreplaceable application advantages in various high-end applications such as precision control, aerospace, military technology, medical technology and other fields. However, the current coreless motor coil winding process is the technical threshold for major micro-motor companies, and almost the current coil arrangement structure and process methods disclosed in the market have been monopolized by foreign countries for a long time. Therefore, it is necessary to find new structures and process methods. Further promote the technological breakthrough and market application of the coreless motor.

In the currently known coreless coil arrangement structure, there are two types of diamond winding and oblique winding. In the three-phase brushed and brushless coreless coil structure, each phase is continuously wound to occupy the entire The 120° arrangement structure of the coil circumference, the advantage of this arrangement structure is that no matter the oblique winding or diamond winding method, each phase coil has only incoming wires and two wire ends, and there are 6 wire ends in total for three phases , but the disadvantage is that the utilization rate of the coil is low, which belongs to the fractional winding, and its power density is about 15% lower than that of the integer winding; A total of at least 6 individual coils, each phase coil will lead to two incoming wire ends and two outgoing wire ends, and the entire cylindrical three-phase coil will produce six lead ends, the subsequent process needs to separate the two individual coils of each phase The connection of the incoming and outgoing lines is a one-phase coil, the process is very cumbersome, and it can only be done manually. Not only the reliability is poor, but the production efficiency is also very low.

Contents of the invention

In order to solve one or more of the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide a two-pole coreless motor coil structure and its winding method, which can improve the utilization rate of the coil, increase the power density of the motor, and simplify the process .

In order to achieve the above object, the present invention provides a two-pole coreless motor coil structure including a cylindrical coil that is sheathed outside the magnetic steel, and is characterized in that the cylindrical coil includes three coil groups, any The coil group is wound by only one winding wire and only includes one wire inlet and one wire outlet. The cylindrical coil is wound into a frameless hollow cylindrical coil by winding wires of three coil groups.

Further, the cylindrical coil includes three coil groups, and each coil group is sequentially arranged crosswise, and each coil group includes two independent coils wound on a cylindrical surface that are centered and symmetrical to each other, and the two independent coils are The coil is wound in series by the same winding wire, and the arc length occupied by each independent coil on the end face circle of the cylindrical cylindrical coil is 1/6 of the circumference length (that is, the corresponding central angle is 60°)

The winding method of the two-pole coreless motor coil in this scheme is as follows:

(1) Divide the entire coil into three coil groups A, B, and C. At the beginning, the winding of the A coil group starts from any point on the circumference of one end face of the cylinder, and winds along the surface of the cylinder to the cylindrical end. The other end face is opposite to the starting point, that is, at 180°, and then return to the starting point along the surface of the cylinder in the same direction to form the first coil; then start winding the second coil next to the first coil, and so on. Winding until it occupies the width of 1/6 arc length of the end face circumference, then lead out the winding wire and twist it to the 180° position of the same end face circle at the lead-out point and start winding in reverse according to the above method until it occupies the end face The width of 1/6 arc length of the circumference, at this time, the A coil group is wound into shape;

(2) According to the method of step (1), start to wind the B coil group next to the A coil group. After the B coil group is wound and formed, start to wind the C coil group; after the C coil group is wound and formed, A The three coil groups A, B and C each occupy an arc length of 1/3 of the circumference on the same end face circle. At this time, the three coil groups A, B and C form a hollow cylindrical coil without a skeleton.

When adopting this scheme, the present invention divides the whole coil into three coil groups, that is, three phases, and each coil group is distributed in two parts, each of which is centrally symmetrical, and is arranged to occupy one-sixth of the arc length of the circumference. When winding, first wind several turns in one direction according to the waveform winding method, such as clockwise, occupying one-sixth of the circumference, and then rotate the lead wire to the opposite position of the circumference, and then wind the same number of turns to occupy one-sixth; The other two groups of coils are similarly wound to form a cylindrical hollow integral coil.

The present invention has at least the following beneficial effects: the coil arrangement structure of the present invention satisfies the distributed winding structure of full pitch and full slot, which maximizes the power density of the motor. It has symmetry in the electromagnetic structure, full-pitch integer winding arrangement, and only six lead-out wire ends. The structure is simple and easy to manufacture, the power density of the motor is maximized and the process is simple with fewer wire ends, which makes the production more efficient.

Description of drawings

Fig. 1 is the main diagram of the coil structure embodiment of the two-pole hollow cup motor of the present invention;

Figure 2 is a top view of the coil structure of a two-pole coreless motor;

Fig. 3 is a schematic diagram (1) of the winding structure of the A coil group in Fig. 1;

Fig. 4 is the winding structure schematic diagram (two) of A coil group in Fig. 1;

Fig. 5 is the winding structure schematic diagram (three) of A coil group in Fig. 1;

Fig. 6 is a schematic diagram (four) of the winding structure of the A coil group in Fig. 1 .

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

Reference numerals include: A coil group 15 , B coil group 16 , C coil group 17 , A1 coil 18 , B1 coil 19 , C1 coil 20 , A2 coil 21 , B2 coil 22 , and C2 coil 23 .

See Figure 1-6:

A two-pole coreless motor coil structure, including a cylindrical coil that is sleeved outside the magnetic steel, and the cylindrical coil includes three coil groups, namely A coil group 15, B coil group 16, and C coil Group 17. Any coil group is wound by only one winding wire and contains only one incoming wire end and one outgoing wire end, which are respectively: A coil group inlet and outlet wire ends Ain and Aout, B coil group inlet and outlet wire ends Bin and Bout, , C coil group inlet and outlet Cin, Cout. The cylindrical coil is wound into a frameless hollow cylindrical coil by winding wires of three coil groups. Each coil group is arranged crosswise in turn, and each coil group includes two mutually symmetrical independent coils wound on a cylindrical surface, and the two independent coils are wound in series by the same winding wire, respectively: A1 coil 18 , B1 coil 19, C1 coil 20, A2 coil 21, B2 coil 22, C2 coil 23; the arc length occupied by each independent coil on the end face circle of the cylindrical coil is 1/6 of the circumference length (that is, the corresponding with a central angle of 60°).

The winding method of the two-pole coreless motor coil structure is as follows:

(1) The enameled wire of the coil A of the first group of coils is wound from any point on the circumference of one end face of the cylinder (marked as 0° position), and is wound along the cylinder face to the other end face of the cylinder opposite to the starting point, that is, the position of 180° , and then return to the position near the starting point along the cylindrical surface in the same direction to form a turn of winding (accompanying drawing 3); according to the above method, each winding is gradually advanced in one direction along the circumference of the cylinder end surface until it reaches the circumference of the end surface 0 ~ 60 ° position, (accompanying drawing 4).

(2) The enameled wire is drawn from the 60° position on the circumference of the end face of the cylinder, rotated to the 180° position on the circumference of the same end face and continues to be wound, along the cylinder to the other end face of the cylinder opposite to the starting point, that is, the position of 0°, Return to the position near the starting point along the cylindrical surface in the same direction to form a turn of winding (accompanying drawing 5); but the direction of enameled wire winding along the cylindrical surface is opposite to that described in step (1), according to the above method, each Make one turn and advance gradually along one direction of the circumference of the cylinder end face until it reaches the position of 180-240° of the circumference of the end face (accompanying drawing 6).

(3) Start winding the B coil group from the lead-out position of the first group of coils, that is, the 240° position of the end face circle of the upper cylinder (accompanying drawing 2). According to the above winding method, the winding enameled wires are distributed at 60-120° 240-300° position; in the same way, the wound C coil groups are distributed at 120-180° and 300-0° positions to form a two-pole coreless motor coil as a whole.

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (5)

1. A two-pole coreless motor coil structure, comprising a cylindrical coil that is sleeved outside the magnetic steel, it is characterized in that the cylindrical coil includes three coil groups, and any coil group is only composed of one The coil is wound by wire and only includes one wire inlet and one wire outlet. The cylindrical coil is wound into a frameless hollow cylindrical coil by winding wires of three coil groups. 2. A two-pole coreless motor coil as claimed in claim 1, characterized in that: the cylindrical coil comprises three coil groups, each coil group is sequentially arranged crosswise, and each coil group comprises two The independent coils wound on the surface of the cylinder are symmetrical to each other. The two independent coils are wound in series by the same winding wire. The arc length occupied by each independent coil on the end face circle of the cylindrical cylindrical coil is It is 1/6 of the circumference length (that is, the corresponding central angle is 60°). 3. The coil structure of a two-pole coreless motor as claimed in claim 1, wherein the winding wire is an enameled wire. 4. The coil structure of a two-pole coreless motor as claimed in claim 1, wherein the three coil groups are adjacent to each other in sequence. 5. A winding method for a two-pole hollow cup motor coil, characterized in that the winding steps are as follows: (1) the whole coil is divided into three coil groups A, B and C, and at the beginning, the winding of the A coil group The line is wound from any point on the circumference of one end face of the cylinder, wound along the surface of the cylinder to the position where the other end face of the cylinder is opposite to the starting point, that is, 180°, and then returns to the starting point along the surface of the cylinder in the same direction. Form the first turn coil; then start winding the second turn coil next to the first turn coil, and so on, repeat the winding until the width occupies 1/6 arc length of the end face circumference, and then lead out the winding wire to twist it to The 180° position of the same end face circle of the lead-out point starts to be wound in reverse according to the above method, until it occupies the width of 1/6 arc length of the end face circle, at this time, the A coil group is wound into shape; (2) According to the method of step (1), start to wind the B coil group next to the A coil group. After the B coil group is wound and formed, start to wind the C coil group; after the C coil group is wound and formed, A The three coil groups A, B and C each occupy an arc length of 1/3 of the circumference on the same end face circle. At this time, the three coil groups A, B and C form a hollow cylindrical coil without a skeleton.