Method for determining specification of star sealing ring of motor, star sealing ring and motor
By scientifically calculating the material and cross-sectional area of the star seal ring, the safety hazards and material consumption problems in the star sealing of the motor stator winding are solved, the specifications of the star sealing ring are optimized, and the efficiency of the star sealing and the safety of the motor structure are improved.
Patent Information
- Application Number
- CN202410009229.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-03
- Publication Date
- 2025-07-11
AI Technical Summary
In the prior art, the motor stator winding star sealing method has safety hazards and increased material consumption, especially when the winding coil needs to have more leads at one end of the star sealing, the spot welding efficiency is low and the thickening of the star sealing ring affects the internal electrical gap of the motor.
By obtaining the motor winding coil information, determining the material and cross-sectional area of the star seal ring, scientific methods are used to calculate the star seal ring specifications to optimize the design of the star seal ring, and comprehensively consider the load capacity, motor volume and electrical clearance.
It realizes that while ensuring the safety of the motor, reduce material consumption, optimize the specifications of the star seal ring, improve the efficiency of star sealing, avoid safety hazards of welding points, and optimize the motor structure.
Smart Images
Figure CN120294558A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure generally relates to the technical field of electric machines. More specifically, the present disclosure relates to a method for determining the specification of a star-ring of an electric machine, a star-ring, and an electric machine. Background Art
[0002] An electric machine is a device that realizes the conversion between mechanical energy and electrical energy and transforms electrical energy based on the electromagnetic induction phenomenon, and is a very important device in industry, agriculture, transportation, national defense projects, medical equipment, and daily life.
[0003] Generally, the interior of an electric machine includes a stator, which is the fixed part of the electric machine and consists of an iron core and windings. Among them, the main function of the stator windings is to generate a magnetic field inside the electric machine so that the magnetic field generated by the stator can interact with the rotor magnetic field, thereby causing the rotor to rotate. The stator windings are composed of single-turn or multi-turn coils, and each branch is connected in parallel or in series.
[0004] In the current market, there is a three-phase electric machine in which the stator winding coils inside are star-connected, that is, one end of the winding is used as a lead wire to serve as three phase wires; the other ends are all connected to a point, that is, the lead wires of the end of the winding coil that needs to be star-connected are star-connected. When there are fewer lead wires at the end of the star-connected winding coil that needs to be star-connected, star connection can be completed by spot welding the lead wires at the end that needs to be star-connected. In the above star connection method, on the one hand, there may be potential safety hazards; on the other hand, when there are more lead wires at the end that needs to be star-connected, it is impossible to connect all the lead wires by spot welding, or the welding points after welding are relatively large, resulting in potential safety hazard problems.
[0005] In addition, in the current market, there is also a method of completing star connection through a star-ring, that is, connecting the lead wires at the end of the stator winding that needs to be star-connected to a ring-shaped wire to complete star connection. In this method, when there are more lead wires at the end of the winding that needs to be star-connected, considering the load problem of the star-ring, the star-ring is thickened empirically. However, thickening the star-ring will increase material consumption on the one hand and affect the electrical clearance inside the electric machine on the other hand.
[0006] In view of this, there is an urgent need to provide an innovative method for determining the specification of the star-ring of an electric machine, a star-ring of an electric machine, and an electric machine, so as to make the structure of the star-ring of the electric machine better and further optimize the structure of the electric machine. Summary of the Invention
[0007] In order to at least solve the problems of increased material consumption or affecting the electrical clearance inside the electric machine caused by determining the specification of the star-ring empirically as mentioned above, the present disclosure proposes a method for determining the specification of the star-ring of an electric machine, a star-ring of an electric machine, and an electric machine in multiple aspects.
[0008] In a first aspect, the present disclosure provides a method for determining the specifications of a star connection ring of an electric motor, where the specifications include a first cross-sectional area of the star connection ring. The method is characterized in that it includes: obtaining winding coil information of the electric motor; determining a first material of the star connection ring; and determining the first cross-sectional area of the star connection ring based on the winding coil information and the first material.
[0009] In a second aspect, the present disclosure provides a star connection ring of an electric motor, which is characterized in that the star connection ring is arranged to perform star connection on the electric motor; and the specifications of the star connection ring are determined by the method described in the first aspect of the present disclosure.
[0010] In a third aspect, the present disclosure provides an electric motor, which is characterized in that the electric motor includes a winding coil and a star connection ring, such that the star connection ring performs star connection on the winding coil; and the specifications of the star connection ring are determined by the method described in the first aspect of the present disclosure.
[0011] Through a method for determining the specifications of a star connection ring of an electric motor provided as above, the present disclosure can reveal the relationship between the specifications of the connection ring and the specifications of the winding coils in the electric motor, so as to more scientifically determine the specifications of the star connection ring of the electric motor. Further, the present disclosure also provides a star connection ring of an electric motor, and the specifications of the star connection ring can be determined according to the method described in the present disclosure, such that when the number of parallel paths of the winding coils in the electric motor is large, issues such as material consumption and the load capacity of the star connection ring can be comprehensively considered to optimize the specifications of the star connection ring. Even further, the present disclosure also provides an electric motor, and the electric motor includes a winding coil and a star connection ring. Similarly, the specifications of the star connection ring can be determined by the method described in the present disclosure, so that when the number of parallel paths of the winding coils in the electric motor is large, the specifications of the star connection ring can be determined while comprehensively considering issues such as load capacity, the volume of the electric motor, and the electrical clearance of the electric motor. Description of the Drawings
[0012] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features, and advantages of the exemplary embodiments of the present disclosure will become readily understandable. In the drawings, several embodiments of the present disclosure are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, where:
[0013] Figure 1 Shows a method for determining the specifications of a star connection ring of an electric motor according to an embodiment of the present disclosure;
[0014] Figure 2 Shows another method for determining the specifications of a star connection ring of an electric motor according to an embodiment of the present disclosure;
[0015] Figure 3 Shows a schematic diagram of the connection between a winding coil and a star connection ring according to an embodiment of the present disclosure. Detailed Embodiments
[0016] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Apparently, the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.
[0017] It should be understood that the terms "including" and "comprising" used in the specification and claims of the present disclosure indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.
[0018] It should also be understood that the terms used in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. As used in the specification and claims of the present disclosure, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms. It should be further understood that the term "and / or" used in the specification and claims of the present disclosure refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.
[0019] As used in this specification and the claims, the term "if" may be construed as "when" or "once" or "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be construed as meaning "once determined" or "in response to determining" or "once detected [the described condition or event]" or "in response to detecting [the described condition or event]" depending on the context.
[0020] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
[0021] Generally, the interior of a motor may include multiple electrical structures such as an iron core, winding coils, a rotor, etc. When designing a motor, it is necessary to consider not only whether the multiple electrical structures inside the motor can be coupled to each other to make the motor operate, but also whether the electrical clearance between the multiple electrical structures is sufficient to ensure good safety of the motor during operation. Among them, when the winding coils are connected in a star configuration, how to complete the star connection of the winding coils while ensuring the above-mentioned effects becomes an important issue.
[0022] The star connection of the winding coil can be completed by spot welding one end of the winding coil that needs to be star-connected. However, when there are many circuits at the end of the winding coil that needs to be star-connected, the efficiency of spot welding is low. Therefore, a star connection ring can be used to complete the star connection of the winding coil. In traditional application scenarios, the specifications of the star connection ring are determined based on production experience. When there are fewer circuits at the end of the winding coil that needs to be star-connected, the star connection ring can be adjusted thinner according to experience; when there are more circuits at the end of the winding coil that needs to be star-connected, the star connection ring can be adjusted thicker according to experience.
[0023] Considering that in the above scenarios, determining the specifications of the star connection ring based on production experience does not form a relatively clear reference standard, making it impossible to accurately control the production process and cost. Therefore, the inventor discloses a method for determining the specifications of the star connection ring of a motor, a star connection ring, and a motor in this disclosure to overcome at least one or more of the above-mentioned problems.
[0024] In some embodiments of this disclosure, a method for determining the specifications of the star connection ring of a motor is disclosed; wherein, the specifications may include the first cross-sectional area of the star connection ring. Specifically, the method for determining the specifications of the star connection ring of a motor includes: obtaining the winding coil information of the motor; determining the first material of the star connection ring; and determining the first cross-sectional area of the star connection ring based on the winding coil information and the first material. Figure 1 A method for determining the specifications of the star connection ring of a motor according to an embodiment of this disclosure is shown, and the following will be further described in conjunction with Figure 1 for further illustration.
[0025] As Figure 1 shown, in step S110, the winding coil information of the motor is obtained. The star connection ring can be used to star-connect the winding coil, that is, the star connection ring is connected to the lead wire at the end of the winding coil that needs to be star-connected, that is, there is current flowing between the winding coil and the star connection ring. Therefore, the specifications of the star connection ring need to be determined according to the first current flowing through the star connection ring, so that the star connection ring can carry the first current flowing through it. Further, the first current flowing through the star connection ring is related to the winding coil, so the winding coil information needs to be obtained when determining the specifications of the star connection ring.
[0026] Next, in step S120, the first material of the star-sealing ring is determined, and then in step S130, based on the winding coil information and the first material, the first cross-sectional area of the star-sealing ring is determined. As described above, the specification of the star-sealing ring is used to enable the star-sealing ring to carry the first current flowing through the star-sealing ring. In one embodiment, when the current flows through the star-sealing ring, it does not pass through any load, that is, the function of the star-sealing ring can be to short-circuit the line of the winding coil connected to the star-sealing ring. It can be understood that when the star-sealing ring is used to short-circuit the line of the winding coil connected to the star-sealing ring, its function can be a wire. Those skilled in the art can also understand that the current-carrying capacity of a wire can be measured by its material and cross-sectional area. Therefore, when the first current flowing through the star-sealing ring and the first material are determined, the current-carrying capacity of the star-sealing ring can be measured according to the first cross-sectional area of the star-sealing ring. Among them, those skilled in the art can understand that the material of the star-sealing ring can be directly determined according to the actual application situation. The material of the star-sealing ring can be any conductive material such as copper, iron, aluminum, etc., and this disclosure does not limit it in this regard. The first current flowing through the star-sealing ring, as described above, can be determined according to the winding coil information.
[0027] In one embodiment, the winding coil information may include the second current of the winding coil. Among them, the second current can be used to determine the first current flowing through the star-sealing ring. As described above, determining the first cross-sectional area of the star-sealing ring based on the winding coil information and the first material includes: determining the first current of the star-sealing ring based on the second current; determining the first cross-sectional area based on the first current and the first material. Figure 2 Another method for determining the specification of the star-sealing ring of the motor according to the embodiments of the present disclosure is shown below, and the following will be combined with Figure 2 for further description.
[0028] As Figure 2 shown, in step S210, the first current of the star-sealing ring is determined based on the second current. Among them, the second current is the current flowing through the winding coil, and the first current is the current flowing through the star-sealing ring. It can be understood that the winding coil is short-circuited with the star-sealing ring, and the first current flowing through the star-sealing ring can be determined according to the second current flowing through the winding coil. Further, the second current flowing through the winding coil can be determined according to the power supply, and the power supply can be adjusted according to the actual application situation, and its parameters are known. Further, according to Kirchhoff's law, the relationship between the second current and the first current can be determined. In one embodiment, a three-phase motor is known. When the number of parallel winding coil paths is 1, that is, one end of the winding coil that needs to be star-sealed includes 3 leads, it is desired to star-seal the motor through the star-sealing ring so that the star-sealing ring can carry the current flowing out of one end of the winding coil that needs to be star-sealed. Figure 3 A schematic diagram of the connection between the winding coil and the star-sealing ring according to the embodiments of the present disclosure is shown below, and the following will be combined with Figure 3 for further description.
[0029] As shown Figure 3 in FIG., the star - connecting ring 110 is short - circuited with one end of the winding coil that needs to be star - connected; one end of the winding coil that needs to be star - connected includes line 120, line 130, and line 140; the nodes where the star - connecting ring is connected to line 120, line 130, and line 140 are a, b, and c respectively; nodes a, b, and c divide the star - connecting ring 110 into three segments: ab, bc, and ca.
[0030] Specifically, line 120, line 130, and line 140 are one end of the winding coil that needs to be star - connected, and the other end is connected to the power supply. Therefore, the current in line 120, line 130, or line 140, that is, the second current flowing through the winding coil, can be determined according to the power supply. It can be understood that the currents in line 120, line 130, and line 140 can be equal. Further, according to Kirchhoff's law, at any node in the circuit, at any moment, the sum of the currents flowing into the node is equal to the sum of the currents flowing out of the node. Thus, the currents flowing into nodes a, b, and c are equal to the currents flowing out of nodes a, b, and c at any moment. Even further, the current in line 120, line 130, and line 140, that is, the second current flowing through the winding coil, can be determined according to the power supply. Therefore, according to the relationship between the currents flowing into and out of nodes a, b, and c and the second current of the winding coil, the first current flowing through the star - connecting ring 110 is In addition, according to the calculation results, the first current flowing through the star - connecting ring has nothing to do with the number of parallel paths of the winding coil. When the number of parallel paths of the winding coil changes, the first current flowing through the star - connecting ring is always the second current flowing through the winding coil. The specific calculation process is known to those skilled in the art and will not be elaborated here.
[0031] In another embodiment, a three - phase motor is known. When the number of parallel paths of its winding coils is 2, that is, one end of the winding coil that needs to be star - connected includes 6 leads, it is desired to star - connect the motor through the star - connecting ring so that the star - connecting ring can carry the current flowing out of one end of the winding coil that needs to be star - connected. According to the method described above, the first current flowing through the star - connecting ring is also
[0032] Then, in step S220, based on the first current and the first material, determine the first cross - sectional area of the star - connecting ring. Determining the first cross - sectional area of the star - connecting ring based on the first current and the first material can be calculated according to the following formula (1):
[0033]
[0034] Wherein, S is the first cross-sectional area of the star-sealing ring; I is the first current flowing through the star-sealing ring; K is the material coefficient of the star-sealing ring; δ is the resistivity of the star-sealing ring. Specifically, the first current I flowing through the star-sealing ring can be determined according to the method described in S210; the material coefficient K and resistivity δ of the star-sealing ring can be determined according to the first material of the star-sealing ring. For example, after the first material of the star-sealing ring is determined, the material coefficient and resistivity of the star-sealing ring can be queried according to empirical constants. Then, the first cross-sectional area of the star-sealing ring is calculated based on the above-known quantities and formula (1).
[0035] Further, as described above, the first current flowing through the star-sealing ring is always the second current flowing through the winding coil According to formula (1), the following formula (2) can be further obtained:
[0036]
[0037] Wherein, S1 is the first cross-sectional area of the star-sealing ring, δ1 is the first resistivity of the star-sealing ring, K1 is the first material coefficient of the star-sealing ring; S2 is the second cross-sectional area of the winding coil, δ2 is the second resistivity of the winding coil, K2 is the second material coefficient of the winding coil. Further, the first resistivity δ1 and the first material coefficient K1 of the star-sealing ring can be determined according to the first material of the star-sealing ring; the second resistivity δ2 and the second material coefficient K2 of the winding coil can be determined according to the second material of the winding coil.
[0038] In another embodiment, the winding coil information further includes the second cross-sectional area and the second material of the winding coil. It can be understood that the second material of the winding coil and the first material of the star-sealing ring can be directly determined according to the actual application situation. If the second material and the first material are the same, the first cross-sectional area can be determined based on the second cross-sectional area. Specifically, when the first material and the second material are the same, that is, the first resistivity δ1 of the star-sealing ring and the second resistivity δ2 of the winding coil are the same; the first material coefficient K1 of the star-sealing ring and the second material coefficient K2 of the winding coil are the same. Further, formula (3) can be obtained:
[0039]
[0040] Wherein, S1 is the first cross-sectional area of the star-sealing ring, and S2 is the second cross-sectional area of the winding coil. The second cross-sectional area of the winding coil can be determined according to the winding coil information. Therefore, the first cross-sectional area of the star-sealing ring is
[0041] If the second material is different from the first material, the first cross-sectional area is determined based on the second cross-sectional area, the second material, and the first material. Among them, the second cross-sectional area, the second material, and the first material can be directly determined according to the actual application situation, that is, the second cross-sectional area, the material coefficient, and the resistivity of the winding coil, and the material coefficient and resistivity of the star connection ring can be known. Then, the first cross-sectional area of the star connection ring can be determined by calculating through the formula (2) described above.
[0042] In an implementation scenario, the present disclosure also discloses a star connection ring of a motor, and the star connection ring is arranged to perform star connection on the motor. Specifically, when the winding coil in the motor adopts a star connection, one end of the winding coil needs to be star-connected. Further, the line at the end of the winding coil that needs to be star-connected can be connected to the star connection ring, so that the end of the winding coil that needs to be star-connected is short-circuited, that is, the star connection ring can be used as a wire to short-circuit the end of the winding coil that needs to be star-connected. Furthermore, when the star connection ring is used as a wire, the specifications of the star connection ring need to be determined so that the star connection ring can carry the current flowing through the star connection ring. The specifications of the star connection ring can include the material and the cross-sectional area; among them, the material can be directly determined according to the actual application situation, and the cross-sectional area can be determined by the method described above, which will not be elaborated here. In the above scenario, the specifications of the star connection ring can be scientifically designed according to the actual application situation to better control the process and materials of the star connection ring.
[0043] In an implementation scenario, the present disclosure also discloses a motor. The motor includes a winding coil and a star connection ring, and the winding coil is connected to the star connection ring. Specifically, the specifications of the winding coil can be adjusted according to the actual application situation, and the specifications of the star connection ring are matched with the specifications of the winding coil. Further, the winding coil can adopt a star connection, and the star connection ring can be connected to the end of the winding coil that needs to be star-connected to perform star connection on the winding coil, so that the end of the winding coil that needs to be star-connected is short-circuited. Furthermore, when the star connection ring is connected to the winding coil to perform star connection on the winding coil, its function can be to connect the end of the winding coil that needs to be star-connected as a wire. When the star connection ring is used as a wire, the specifications of the star connection ring need to be determined so that the star connection ring can carry the current flowing through the star connection ring. The specifications of the star connection ring can include the material and the cross-sectional area; among them, the material can be directly determined according to the actual application situation, and the cross-sectional area can be determined by the method described above, which will not be elaborated here either. In the above scenario, the specifications of the star connection ring in the motor can be determined by the foregoing method, so that the motor can comprehensively consider problems such as load capacity, motor volume, and electrical clearance of the motor.
[0044] Although several embodiments of the present disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many variations, changes, and alternative approaches may be contemplated by those skilled in the art without departing from the spirit and scope of the present disclosure. It should be understood that various alternatives to the embodiments of the present disclosure described herein may be employed in practicing the present disclosure. The appended claims are intended to define the scope of protection of the present disclosure and thus cover equivalents or alternatives within the scope of these claims.
Claims
1. A method for determining the specifications of a star-sealing ring of an electric machine, the specifications including a first cross-sectional area of the star-sealing ring, characterized in that, The method includes: Obtaining winding coil information of the motor; Determining a first material of the star connection ring; Determining a first cross-sectional area of the star connection ring based on the winding coil information and the first material.
2. The method according to claim 1, wherein The winding coil information includes a second current of the winding coil, and determining the first cross-sectional area of the star connection ring based on the winding coil information includes: Determining a first current of the star connection ring based on the second current; Determining the first cross-sectional area based on the first current and the first material.
3. The method according to claim 1, wherein The winding coil information further includes a second cross-sectional area and a second material of the winding coil.
4. The method according to claim 3, wherein If the second material is the same as the first material, the first cross-sectional area is determined based on the second cross-sectional area.
5. The method according to claim 4, wherein The first cross-sectional area is times that of the second cross-sectional area.
6. The method according to claim 3, wherein If the second material is different from the first material, the first cross-sectional area is determined based on the second cross-sectional area, the second material, and the first material.
7. A star connection ring of a motor, characterized in that The star connection ring is arranged to perform star connection on the motor; and The specification of the star connection ring is determined by the method according to any one of claims 1-6.
8. A motor, characterized in that, The motor includes a winding coil and a star connection ring, The winding coil is connected to the star connection ring so that the star connection ring performs star connection on the winding coil; The specification of the star connection ring is determined by the method according to any one of claims 1-6.