CN212137516U - Electric motor - Google Patents
Electric motor Download PDFInfo
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- CN212137516U CN212137516U CN202020686001.7U CN202020686001U CN212137516U CN 212137516 U CN212137516 U CN 212137516U CN 202020686001 U CN202020686001 U CN 202020686001U CN 212137516 U CN212137516 U CN 212137516U
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Abstract
The utility model belongs to the technical field of the motor technique and specifically relates to indicate a motor, including mounting and double rotor structure, double rotor structure is including two rotors that overlap mutually together, one of them rotor is called first rotor, another rotor is called the second rotor, the motor still includes the ring gear of being connected with first rotor, first drive wheel of being connected with the second rotor and rotate at least one second drive wheel of being connected with the mounting, first rotor all rotates with the mounting with the second rotor and is connected, ring gear and the coaxial rotation of first rotor, first drive wheel and the coaxial rotation of second rotor, ring gear and first drive wheel mesh with the second drive wheel respectively, first rotor includes at least one work winding, at least one work winding encircles the axis of second rotor, work winding is used for driving the second rotor and rotates. The utility model discloses a starting current is less to make starting current less to the impact of outer net and peripheral equipment.
Description
Technical Field
The utility model belongs to the technical field of the motor technique and specifically relates to indicate a motor.
Background
When a conventional motor is started, the slip ratio between a rotor and an air gap magnetic field is large, and the speed of cutting a rotor conductor by the air gap magnetic field is large, so that the starting current is large, and the impact on a power grid and peripheral equipment is easily caused.
Disclosure of Invention
The utility model discloses problem to prior art provides a motor that starting current is little.
The utility model adopts the following technical scheme: a motor comprises a fixing piece and a double-rotor structure, wherein the double-rotor structure comprises two rotors which are sleeved together, one rotor is called a first rotor, the other rotor is called a second rotor, the motor further comprises an inner gear ring connected with the first rotor, a first driving wheel connected with the second rotor and at least one second driving wheel rotatably connected with the fixing piece, the first rotor and the second rotor are rotatably connected with the fixing piece, the inner gear ring and the first rotor coaxially rotate, the first driving wheel and the second rotor coaxially rotate, the inner gear ring and the first driving wheel are respectively meshed with the second driving wheel, the first rotor comprises at least one working winding, the at least one working winding surrounds the axis of the second rotor, and the working winding is used for driving the second rotor to rotate.
Preferably, the first rotor comprises at least two working windings, all of which have unequal numbers of poles.
Preferably, the first rotor is fitted around the outer periphery of the second rotor, and the axial center of the first rotor and the axial center of the second rotor are located on the same axis.
Preferably, the number of the second transmission wheels is multiple, and the multiple second transmission wheels are uniformly distributed around the axis of the second rotor.
Preferably, the number of the second transmission wheels is three.
Preferably, the first rotor is provided with a first output shaft, and the second rotor is provided with a second output shaft.
Preferably, the first output shaft is located at one end of the first rotor far away from the ring gear, and the second output shaft is located at one end of the second rotor far away from the first output shaft.
Preferably, the first rotor and the second rotor are both arranged inside the fixing piece, an air duct is arranged between the fixing piece and the first rotor, an air inlet and an air outlet which are used for communicating the air duct and the outside of the fixing piece are respectively arranged at two ends of the fixing piece, and the first rotor is provided with fan blades located inside the air duct.
Preferably, the motor further comprises a conductive slip ring fixed to the stator, and the working winding is connected to an external power source through the conductive slip ring.
The utility model has the advantages that: the slip ratio between the second rotor and the air gap magnetic field is smaller when the second rotor is started, so that the starting current of the motor is smaller, and the impact of the starting current on an outer net and peripheral equipment is smaller.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view taken along a-a of fig. 1.
The reference signs are: 1. a fixing member; 2. a first rotor; 21. a working winding; 22. a first output shaft; 3. a second rotor; 31. a second output shaft; 32. a fan blade; 4. an inner gear ring; 5. a first drive pulley; 6. a second transmission wheel; 7. an air duct; 71. an air inlet; 72. an air outlet; 8. a conductive slip ring.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, an electric motor includes a fixed member 1 and a dual-rotor structure, the dual-rotor structure includes two rotors, one of the rotors is referred to as a first rotor 2, the other rotor is referred to as a second rotor 3, the electric motor further includes an inner gear ring 4 connected to the first rotor 2, a first transmission wheel 5 connected to the second rotor 3, and at least one second transmission wheel 6 rotatably connected to the fixed member 1, the first rotor 2 and the second rotor 3 are both rotatably connected to the fixed member 1, the inner gear ring 4 is coaxially rotated with the first rotor 2, the first transmission wheel 5 is coaxially rotated with the second rotor 3, the inner gear ring 4 and the first transmission wheel 5 are respectively engaged with the second transmission wheel 6, the first rotor 2 includes at least one working winding 21, and at least one working winding 21 surrounds the axis of the second rotor 3, the working winding 21 is used to drive the second rotor 3 to rotate.
The using process comprises the following steps: alternating current is supplied to one working winding 21 of the first rotor 2, so that the working winding 21 generates a rotating magnetic field, and the second rotor 33 generates an induced potential, an induced current is formed, and the rotating magnetic field generates electromagnetic force on the second rotor 3. Since both the first rotor 2 and the second rotor 3 can rotate freely, when the rotating magnetic field formed by the working winding 21 on the first rotor 2 applies force to the second rotor 3, the first rotor 2 also receives reaction force, so that the first rotor 2 and the second rotor 33 rotate in opposite directions. The first rotor 2 drives the inner gear ring 4 to rotate, so that the inner gear ring 4 drives the second transmission wheel 6 to rotate, and the rotation direction of the second transmission wheel 6 is the same as that of the inner gear ring 4; the second transmission wheel 6 also drives the first transmission wheel 5 connected with the second rotor 3 to rotate, and the rotation directions of the second transmission wheel 6 and the first transmission wheel 5 are opposite, so that the torque of the first rotor 2 is superposed on the second rotor 3, and the output torque of the second rotor 3 is larger. After the first rotor 2 is connected to the load, the first rotor 2 drags the load by its own torque and the torque of the second rotor 3.
The rotor speed of the asynchronous motor depends on the rotational speed of the air-gap field, and in the double-rotor motor, the rotational speed n0 of the air-gap field is equal to the algebraic sum of the rotational speed n1 of the rotating magnetic field generated by the first rotor 2 and the mechanical rotational speed n2 of the first rotor 2, i.e., n0 ═ n1 ± n2, according to the motor principle. In a conventional motor, the stator cannot rotate and the rotor is driven by the rotating magnetic field generated by the windings on the stator, which can be seen as the case where the mechanical speed n2 of the first rotor 2 is equal to 0 in a double rotor motor, i.e. the speed n0 of the air-gap magnetic field is equal to the speed n1 of the rotating magnetic field, in which case the slip between the second rotor 2 and the speed n0 of the air-gap magnetic field at start-up is large and the start-up current is large. In some embodiments, after starting, the first rotor 2 and the second rotor 3 rotate in opposite directions, and at this time, the rotation speed n0 of the air-gap magnetic field is equal to the rotation speed n1 of the rotating magnetic field minus the mechanical rotation speed n2 of the first rotor 2, so that the rotation speed of the second rotor 3 is small, and the rotor can be adapted to the use occasions with low rotation speed and high torque, and meanwhile, the slip ratio between the second rotor 2 and the rotation speed n0 of the air-gap magnetic field is small, and the starting current is small.
In some embodiments, there is also an effect that it is easy to change the rotation speed of the second rotor 3. When the second rotor 3 is connected to the first drive wheel 5, that is, the rotation speeds of the two are equal, and the rotation speed of the two is n3, and the rotation speed of the first rotor 2 is n2, the sum of the rotation speeds of the first rotor 2 and the second rotor 3 is the motor rated rotation speed ne, that is, ne is n2+ n3, because the asynchronous motor structure is adopted. Meanwhile, since the ring gear 4 of the first rotor 2 is connected to the first transmission wheel 5 of the second rotor 3 through the second transmission wheel 6, when the transmission ratio among the ring gear 4, the second transmission wheel 6 and the first transmission wheel 5 is assumed to be i, it can be seen that n3 is n2/i is (ne-n3)/i, and it is obvious that the user can change the rotation speed of the second rotor 3 by changing the transmission ratio i. The transmission ratio can thus be designed in advance according to the desired rotational speed.
Specifically, the first rotor 2 is provided with at least two working windings 21, the number of poles of all the working windings 21 is different, and a user can make the second rotor 3 have different rotating speeds by electrifying different working windings 21.
As shown in fig. 1, the first rotor 2 is sleeved on the periphery of the second rotor 3, and the axis of the first rotor 2 and the axis of the second rotor 3 are located on the same axis, so that the effect of making the structure compact is effectively achieved.
As shown in fig. 2, in order to stabilize the transmission and make the stress on the first transmission wheel 5 uniform, the number of the second transmission wheels 6 is plural, and the plural second transmission wheels 6 are uniformly distributed around the axial center of the second rotor 3.
In particular, the number of second transmission wheels 6 is three. Experiments show that the transmission performance is best when the number of the second transmission wheels 6 is three.
As shown in fig. 1, the first rotor 2 is provided with a first output shaft 22, the second rotor 3 is provided with a second output shaft 31, and both the first rotor 2 and the second rotor 3 can drag a load, thereby achieving an effect of improving practicability.
As shown in fig. 1, the first output shaft 22 is located at an end of the first rotor 2 away from the ring gear 4, and the second output shaft 31 is located at an end of the second rotor 3 away from the first output shaft 22, so that the ring gear 4 is prevented from affecting the rotation of the first output shaft 22 and the first output shaft 22 is prevented from affecting the rotation of the second output shaft 31.
As shown in fig. 1, the first rotor 2 and the second rotor 3 are both disposed inside the fixing member 1, an air duct 7 is disposed between the fixing member 1 and the first rotor 2, an air inlet 71 and an air outlet 72 for communicating the air duct 7 with the outside of the fixing member 1 are respectively disposed at two ends of the fixing member 1, and the first rotor 2 is disposed with fan blades 32 located inside the air duct 7. When the first rotor 2 rotates, the fan blades 32 also rotate to accelerate the air flow in the air duct 7, thereby accelerating the heat dissipation in the fixing member 1.
As shown in fig. 1, the motor further includes a conductive slip ring 8 fixed to the stator 1, and the working winding 21 is connected to an external power source through the conductive slip ring 8, so as to prevent the wire on the working winding 21 from being wound and knotted due to rotation.
The above description is only for the preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention is disclosed in the preferred embodiment, it is not limited to the above description, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, but all the technical solutions of the present invention are within the scope of the present invention.
Claims (9)
1. An electric motor characterized by: the motor comprises a fixing piece (1) and a double-rotor structure, wherein the double-rotor structure comprises two rotors which are sleeved together, one rotor is called a first rotor (2), the other rotor is called a second rotor (3), the motor further comprises an inner gear ring (4) connected with the first rotor (2), a first transmission wheel (5) connected with the second rotor (3) and at least one second transmission wheel (6) rotationally connected with the fixing piece (1), the first rotor (2) and the second rotor (3) are rotationally connected with the fixing piece (1), the inner gear ring (4) and the first rotor (2) rotate coaxially, the first transmission wheel (5) and the second rotor (3) rotate coaxially, the inner gear ring (4) and the first transmission wheel (5) are respectively meshed with the second transmission wheel (6), the first rotor (2) comprises at least one working winding (21), the at least one working winding (21) surrounds the axis of the second rotor (3), and the working winding (21) is used for driving the second rotor (3) to rotate.
2. An electric motor as claimed in claim 1, characterized in that: the first rotor (2) comprises at least two working windings (21), the number of poles of all the working windings (21) being unequal.
3. An electric motor as claimed in claim 1, characterized in that: the first rotor (2) is sleeved on the periphery of the second rotor (3), and the axis of the first rotor (2) and the axis of the second rotor (3) are located on the same axis.
4. An electric motor as claimed in claim 1, characterized in that: the number of the second transmission wheels (6) is multiple, and the second transmission wheels (6) are uniformly distributed around the axis of the second rotor (3).
5. An electric motor as claimed in claim 4, characterized in that: the number of the second transmission wheels (6) is three.
6. An electric motor as claimed in claim 1, characterized in that: the first rotor (2) is provided with a first output shaft (22), and the second rotor (3) is provided with a second output shaft (31).
7. An electric motor as claimed in claim 6, wherein: the first output shaft (22) is located at one end, far away from the inner gear ring (4), of the first rotor (2), and the second output shaft (31) is located at one end, far away from the first output shaft (22), of the second rotor (3).
8. An electric motor as claimed in claim 1, characterized in that: first rotor (2) with second rotor (3) all set up the inside at mounting (1), mounting (1) with be equipped with wind channel (7) between first rotor (2), the both ends of mounting (1) are provided with the confession respectively wind channel (7) and air intake (71) and air outlet (72) of the outside intercommunication of mounting (1), first rotor (2) are equipped with flabellum (32) that are located wind channel (7) inside.
9. An electric motor as claimed in claim 1, characterized in that: the motor also comprises a conductive slip ring (8) fixed on the fixed part (1), and the working winding (21) is connected with an external power supply through the conductive slip ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020686001.7U CN212137516U (en) | 2020-04-28 | 2020-04-28 | Electric motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020686001.7U CN212137516U (en) | 2020-04-28 | 2020-04-28 | Electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212137516U true CN212137516U (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020686001.7U Active CN212137516U (en) | 2020-04-28 | 2020-04-28 | Electric motor |
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| Country | Link |
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| CN (1) | CN212137516U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113114015A (en) * | 2021-04-30 | 2021-07-13 | 壹倍科技(东莞)有限公司 | Permanent magnet synchronous motor and starting method |
-
2020
- 2020-04-28 CN CN202020686001.7U patent/CN212137516U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113114015A (en) * | 2021-04-30 | 2021-07-13 | 壹倍科技(东莞)有限公司 | Permanent magnet synchronous motor and starting method |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 523000 Room 101, building 1, 28 Dongke Road, Dongcheng Street, Dongguan City, Guangdong Province Patentee after: One time motor (Dongguan) Co.,Ltd. Address before: No.130, Fudong Road, yuanwubian, Nancheng District, Dongguan City, Guangdong Province, 523000 Patentee before: Dongguan Yangli Electric Technology Co.,Ltd. |
|
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 101, No. 130 Fudong Road, Yuanwu Bian, Nancheng Street, Dongguan City, Guangdong Province, 523000 Patentee after: Yibei Technology (Dongguan) Co.,Ltd. Address before: 523000 Room 101, building 1, 28 Dongke Road, Dongcheng Street, Dongguan City, Guangdong Province Patentee before: One time motor (Dongguan) Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230711 Address after: Room 801-3, R&D Workshop, Building 11, Lihe Technology Industry Center, No. 99 Taoyuan East Road, Shishan Town, Nanhai District, Foshan City, Guangdong Province, 528000 (Residence Application) Patentee after: Guangdong Yibeida Drive Technology Co.,Ltd. Address before: Room 101, No. 130 Fudong Road, Yuanwu Bian, Nancheng Street, Dongguan City, Guangdong Province, 523000 Patentee before: Yibei Technology (Dongguan) Co.,Ltd. |
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| TR01 | Transfer of patent right |