CN215419975U - Motor position detection system and motor - Google Patents
Motor position detection system and motor Download PDFInfo
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- CN215419975U CN215419975U CN202120687164.1U CN202120687164U CN215419975U CN 215419975 U CN215419975 U CN 215419975U CN 202120687164 U CN202120687164 U CN 202120687164U CN 215419975 U CN215419975 U CN 215419975U
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Abstract
The utility model provides a motor position detection system and a motor, comprising: the device comprises a motor module, a magnetic component fixed on a motor output shaft of the motor module, a servo module connected with the magnetic component, a transmission component connected with the motor module, and an optical coupler component arranged on the servo module and the transmission component; the motor module is used for driving the transmission assembly to rotate; the magnetic assembly is used for detecting the rotation angle information of the motor output shaft and sending the rotation angle information to the servo module; the optical coupling assembly detects the position information of the transmission assembly and sends the position information to the servo module; the servo module is used for determining the rotation position of the motor, and the rotation position of the motor is determined according to the rotation angle information and the position information. The motor position detection system provided by the embodiment of the utility model can accurately detect the rotation position of the motor.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a motor position detection system and a motor.
Background
At present, an existing motor operation system is divided into an open-loop system and a closed-loop system according to whether a feedback signal exists or not. The open-loop system is a system without feedback information, has higher requirements on the technical level of a user, the torque of a motor, the efficiency and the like, and is generally used in occasions with low precision requirements. Therefore, a closed-loop system is often adopted in a high-precision scene, and the closed-loop system refers to a system which detects the rotation position of the motor as a feedback signal. The existing position detection of the motor is realized by a high-precision grating ruler encoder, but the high-precision grating ruler encoder has high price due to high manufacturing requirements, needs to be matched with an independent controller, has large size and occupies installation space.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention has been made to provide a motor position detection system and a motor that overcome or at least partially solve the above problems.
The utility model discloses a motor position detection system, comprising: the device comprises a motor module, a magnetic component fixed on a motor output shaft of the motor module, a servo module connected with the magnetic component, a transmission component connected with the motor module, and an optical coupler component arranged on the servo module and the transmission component;
the motor module is used for driving the transmission assembly to rotate;
the magnetic assembly is used for detecting the rotation angle information of the motor output shaft and sending the rotation angle information to the servo module;
the optical coupling assembly detects the position information of the transmission assembly and sends the position information to the servo module;
the servo module is used for determining the rotation position of the motor, and the rotation position of the motor is determined according to the rotation angle information and the position information.
Optionally, the servo module is configured to determine that the motor rotation position is the motor position corresponding to the rotation angle information when it is determined that the motor position corresponding to the rotation angle information is the same as the motor position corresponding to the position information.
Optionally, the transmission assembly comprises: the motor module comprises a primary speed reducing assembly connected with the motor module, a secondary speed reducing assembly connected with the primary speed reducing assembly, and a tertiary speed reducing assembly connected with the secondary speed reducing assembly, wherein a code disc grating is arranged on the tertiary speed reducing assembly;
the optical coupler assembly is used for acquiring optical detection information aiming at the coding disc grating, and the optical detection information is adopted to determine the position information of the transmission assembly.
Optionally, the third-stage speed reduction assembly is sleeved on the motor output shaft through a bearing, the first-stage speed reduction assembly is fixed on two main shafts parallel to the motor output shaft, and the second-stage speed reduction assembly is fixed on three main shafts parallel to the motor output shaft.
Optionally, the transmission ratio of the transmission assembly is 64.
Optionally, a driving wheel is fixed on the output shaft of the motor and used for driving the transmission assembly to rotate.
Optionally, the servo module includes at least two wheatstone bridges, and the wheatstone bridges include at least four tunneling magneto-resistance TMR resistors, and the TMR resistors are located in different bridge arms.
Optionally, the magnetic assembly is an annular permanent magnet.
Optionally, the optical coupler assembly comprises a transmitting optical coupler and a receiving optical coupler; the coding disc grating is positioned between the transmitting optocoupler and the receiving optocoupler;
the transmitting optical coupler is arranged on the transmission assembly;
the receiving optocoupler is installed on the servo module.
The embodiment of the utility model also discloses a motor, which comprises: the motor position detection system as described above.
The utility model has the following advantages:
in the embodiment of the utility model, when the motor module rotates, the motor module drives the transmission assembly to rotate; the magnetic assembly detects rotation angle information of the motor output shaft and sends the rotation angle information to the servo module; the optical coupling assembly detects position information of the transmission assembly and sends the position information to the servo module; and the servo module determines the rotation position of the motor according to the rotation angle information and the position information. Because the turned angle information matches with the motor turned angle, positional information matches with the motor turned position for can carry out accurate detection to the turned position of motor.
Drawings
FIG. 1 is a schematic view of a first perspective structure of a motor position detection system according to the present invention;
FIG. 2 is a schematic diagram of a second perspective view of a motor position detection system according to the present invention;
FIG. 3 is a schematic diagram of the structure of the transmission assembly of the motor position detecting system of the present invention;
FIG. 4 is a schematic diagram of a structure of a code wheel grating in the motor position detecting system of the present invention;
fig. 5 is a schematic structural diagram of a magnetic assembly in a motor position detection system according to the present invention.
The reference numbers illustrate: the device comprises a motor module 1, a magnetic module 2, a servo module 3, a transmission module 4, a primary speed reduction module 401, a secondary speed reduction module 402, a tertiary speed reduction module 403, a code disc grating 4031, an optical coupler 5, a transmitting optical coupler 501, a receiving optical coupler 502, a bearing 6, a main shaft 7, a main shaft 8, a main shaft III and a driving wheel 9.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, a first view structural diagram of a motor position detecting system of the present invention is shown; referring to fig. 2, a second view structural diagram of a motor position detecting system of the present invention is shown; the motor position detection system specifically includes:
the device comprises a motor module 1, a magnetic component 2 fixed on a motor output shaft of the motor module, a servo module 3 connected with the magnetic component 2, a transmission component 4 connected with the motor module 1, and an optical coupler component 5 arranged on the servo module 1 and the transmission component 4;
the motor module 1 is used for driving the transmission assembly 4 to rotate;
the magnetic component 2 is used for detecting the rotation angle information of the motor output shaft and sending the rotation angle information to the servo module 3;
the optical coupling component 5 detects the position information of the transmission component 4 and sends the position information to the servo module 3;
the servo module 3 is used for determining the rotation position of the motor, and the rotation position of the motor is determined according to the rotation angle information and the position information.
In the embodiment of the utility model, when the motor module 1 rotates, the transmission assembly 4 is driven to rotate; the magnetic component 2 is fixed on a motor output shaft of the motor module 1, detects rotation angle information of the motor output shaft and sends the rotation angle information to the servo module 3; the optical coupling component 5 is arranged on the servo module 3 and the transmission component 4, detects the position information of the rotation of the transmission component 4 and sends the position information to the servo module 3; and the servo module 3 determines the rotation position of the motor according to the received rotation angle information and the position information. Because the turned angle information matches with the motor turned angle, positional information matches with the motor turned position for can carry out accurate detection to the turned position of motor.
In a preferred embodiment of the utility model, the magnetic assembly 2 may be fixed to the end of the output shaft of the motor. The transmission distance between a transmission mechanism in the transmission assembly 4 and the motor module 1 is reduced, and the structure of the transmission assembly 4 is more compact, so that the volume of the motor position detection system is minimized.
In a preferred embodiment of the present invention, the servo module 3 is configured to determine that the motor rotation position is the motor position corresponding to the rotation angle information when it is determined that the motor position corresponding to the rotation angle information is the same as the motor position corresponding to the position information.
The servo module 3 determines that the structure in the system is normal and the detection result of the rotation position of the motor is correct by judging that the position of the motor corresponding to the rotation angle information is the same as the position of the motor corresponding to the position information; and because the magnetic component 2 is directly fixed on the output shaft of the motor, the rotation angle of the magnetic component 2 is the same as that of the motor module 1, and therefore the rotation position of the motor is determined to be the motor position corresponding to the rotation angle information.
When the servo module 3 judges that the motor position corresponding to the rotation angle information is different from the motor position corresponding to the position information, it indicates that a structure in the system has a fault or is detected abnormally, and at this moment, the rotation position of the motor needs to be detected again after angle correction is carried out on the system.
Referring to fig. 3, there is shown a schematic structural view of a transmission assembly in a motor position detection system of the present invention; referring to fig. 4, there is shown a schematic structural diagram of a code wheel grating in a motor position detection system of the present invention.
In a preferred embodiment of the present invention, the transmission assembly 4 comprises: a primary speed reducing component 401 connected with the motor module 1, a secondary speed reducing component 402 connected with the primary speed reducing component 401, and a tertiary speed reducing component 403 connected with the secondary speed reducing component 402, wherein the tertiary speed reducing component 403 is provided with a code disc grating 4031;
the optical coupler assembly 5 is used for acquiring optical detection information aiming at the code disc grating 4031, and the optical detection information is adopted to determine the position information of the transmission assembly 4.
The transmission assembly 4 can be a three-level speed reducing mechanism, and after the motor module 1 is subjected to three-level speed reduction, the detection precision of the code disc grating 4031 of the rotating position of the motor module 1 on the three-level speed reducing assembly can be improved; therefore, after the motor module 1 is decelerated, the optical coupling component 5 acquires optical detection information aiming at the code disc grating 4031, and the optical detection information is adopted to determine the position information of the transmission component 4.
In a specific implementation, six sets of optical coupling elements 5 may be used, that is, six sets of optical detection information are combined to determine the corresponding position information of the transmission element 4.
In a preferred embodiment of the present invention, the third-stage speed reduction assembly 403 is sleeved on the motor output shaft through a bearing 6, the first-stage speed reduction assembly 401 is fixed on a second main shaft 7 parallel to the motor output shaft, and the second-stage speed reduction assembly 402 is fixed on a third main shaft 8 parallel to the motor output shaft.
The first-stage speed reduction assembly 401 arranged on the second main shaft 7, the second-stage speed reduction assembly 402 arranged on the third main shaft 8 and the third-stage speed reduction assembly 403 are driven by the rotation of the output shaft of the motor, the third-stage speed reduction assembly 403 is connected with the output shaft of the motor through the bearing 6, so that the rotation of the third-stage speed reduction assembly 403 and the output shaft of the motor is not influenced, and the volume of the click position detection system in the embodiment of the utility model can be further reduced because the third-stage speed reduction assembly where the code disc grating 4031 is located is coaxial with the output shaft of the motor.
In a preferred embodiment of the utility model, the transmission ratio of the transmission assembly 4 is 64.
The overall transmission ratio of the transmission assembly 4 is 64, i.e. the rotational speed of the motor output shaft is 64 times the output speed of the three-stage reduction assembly.
In a preferred embodiment of the present invention, a driving wheel 9 is fixed on the output shaft of the motor, and the driving wheel 9 is used for driving the transmission assembly to rotate.
One end of the motor output shaft, which is far away from the magnetic component 2, is fixed with a driving wheel 9, when the motor output shaft rotates, the driving wheel 9 rotates along with the motor output shaft, and the driving wheel 9 is connected with the transmission component 4, so that the transmission component 4 can be driven to rotate. The driving wheel 9 can be a gear or a belt wheel, and when the driving wheel 9 is a gear, the representative transmission component 4 is also a gear-driven speed reduction structure; when the driving wheel is a belt wheel, the transmission component 4 is also a speed reducing structure of belt transmission. The person skilled in the art can select the method according to actual needs, and the embodiment of the present invention is not limited thereto.
In a preferred example of the present invention, the driving wheel is a driving gear, the primary speed reduction assembly 401 is in meshing transmission with the driving gear, and the primary speed reduction assembly 401, the secondary speed reduction assembly 402 and the tertiary speed reduction assembly are all in gear structures and are in meshing transmission through gears.
In a preferred embodiment of the present invention, the servo module 3 includes at least two wheatstone bridges, and the wheatstone bridges include at least four Tunneling Magnetoresistive (TMR) resistors, and the TMR resistors are located in different bridge arms.
Because the magnetic component 2 is fixed on the motor output shaft, the magnetic component 2 can rotate along with the motor output shaft when the motor output shaft rotates, the magnetic field direction and the magnetic field intensity in a fixed position point can also change along with the rotation of the magnetic component 2, and therefore the combination of the magnetic field intensity and the magnetic field direction can obtain the unique corresponding rotation angle of the motor output shaft.
Two Wheatstone bridge circuits formed by TMR resistors, 1 bridge at 0-180 degrees and the other bridge at 180-360 degrees can be arranged in the servo module 3. Each bridge contains 4 TMR resistors. The servo module 3 can adopt a Wheatstone bridge circuit to convert signals of the magnetic field intensity and the magnetic field direction into resistance information, so as to determine the current angle of the output shaft of the motor.
Specifically, the TMR resistance of the free layer of the Wheatstone bridge can change along with the change of the external magnetic field and the change of the included angle between the free layer and the pinned layer can be changed through the arctangent
Each absolute angle is obtained fromThe absolute angle of rotation of the magnetic assembly 2 is obtained.
Referring to fig. 5, a schematic diagram of a magnetic assembly of a motor position detection system of the present invention is shown.
In a preferred embodiment of the utility model, the magnetic assembly 2 is a ring-shaped permanent magnet.
The magnetic component 2 can be a ring-shaped permanent magnet, so that the detection sensitivity is improved.
In a preferred embodiment of the present invention, the optical coupler assembly 5 comprises a transmitting optical coupler 501 and a receiving optical coupler 502; the coding disc grating 4031 is positioned between the transmitting optocoupler 501 and the receiving optocoupler 502;
the transmitting optical coupler 501 is mounted on the transmission assembly 4;
the receiving optocoupler 502 is mounted on the servo module 3.
The optical coupling component 5 comprises a transmitting optical coupling 501 and a receiving optical coupling 502, the coding disc grating 4031 is located between the transmitting optical coupling 501 and the receiving optical coupling 502, after the transmitting optical coupling 501 emits light, the light passes through the coding disc grating 4031, part of the light can be shielded by the coding disc grating 4031, the receiving optical coupling 502 determines light detection information through the received light, and the rotating position of the rotating component 4 is determined according to the light detection information. Wherein, the transmitting optical coupler 501 is installed on the transmission component 4, and the receiving optical coupler 502 is installed on the servo module 3.
In a specific implementation, the motor position detection system may be arranged in a three-layer structure, each layer is independently distinguished by a positioning column and a spacer, the first layer is a primary speed reduction assembly 401 and a secondary speed reduction assembly 402, the second layer is a tertiary speed reduction assembly 403 (on which the position of the code disk grating 4031 is engraved) and a transmitting optical coupler 501 mounting position, and the third layer is a receiving optical coupler 502 mounting position and a magnetic assembly 2 mounting position and a servo assembly 3 mounting position.
In the embodiment of the utility model, when the motor module 1 rotates, the first-stage speed reduction assembly 401, the second-stage speed reduction assembly 402 and the third-stage speed reduction assembly 403 are driven to rotate; the transmitting optocoupler 501 emits light, the receiving optocoupler 502 receives the light through the coding disc grating 4031 on the three-level speed reduction assembly 403 to obtain light detection information, the position information of the transmission assembly 4 is determined, and the position information is sent to the servo module 3; the magnetic component 2 detects the rotation angle information of the motor output shaft and sends the rotation angle information to the servo module 3; and the servo module 3 determines the rotation position of the motor according to the rotation angle information and the position information. Because the turned angle information matches with the motor turned angle, positional information matches with the motor turned position for can carry out accurate detection to the turned position of motor.
The embodiment of the utility model also discloses a motor, which comprises: the motor position detection system as described above.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The motor position detection system and the motor provided by the utility model are described in detail, and the principle and the implementation mode of the utility model are explained by applying specific examples, and the description of the embodiments is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A motor position detection system, comprising: the device comprises a motor module, a magnetic component fixed on a motor output shaft of the motor module, a servo module connected with the magnetic component, a transmission component connected with the motor module, and an optical coupler component arranged on the servo module and the transmission component;
the motor module is used for driving the transmission assembly to rotate;
the magnetic assembly is used for detecting the rotation angle information of the motor output shaft and sending the rotation angle information to the servo module;
the optical coupling assembly detects the position information of the transmission assembly and sends the position information to the servo module;
the servo module is used for determining the rotation position of the motor, and the rotation position of the motor is determined according to the rotation angle information and the position information.
2. The system of claim 1,
and the servo module is used for determining that the motor rotation position is the motor position corresponding to the rotation angle information when judging that the motor position corresponding to the rotation angle information is the same as the motor position corresponding to the position information.
3. The system of claim 1, wherein the transmission assembly comprises: the motor module comprises a primary speed reducing assembly connected with the motor module, a secondary speed reducing assembly connected with the primary speed reducing assembly, and a tertiary speed reducing assembly connected with the secondary speed reducing assembly, wherein a code disc grating is arranged on the tertiary speed reducing assembly;
the optical coupler assembly is used for acquiring optical detection information aiming at the coding disc grating, and the optical detection information is adopted to determine the position information of the transmission assembly.
4. The system of claim 3, wherein the third reduction assembly is sleeved on the motor output shaft through a bearing, the first reduction assembly is fixed on a second main shaft parallel to the motor output shaft, and the second reduction assembly is fixed on a third main shaft parallel to the motor output shaft.
5. The system of claim 1, 3 or 4, wherein the transmission ratio of the transmission assembly is 64.
6. The system of claim 1, wherein a drive wheel is fixed to the output shaft of the motor, and the drive wheel is configured to rotate the transmission assembly.
7. The system of claim 1, wherein the servo module comprises at least two wheatstone bridges comprising at least four tunnel magnetoresistive TMR resistors, the TMR resistors being located in different legs.
8. The system of claim 1, wherein the magnetic assembly is an annular permanent magnet.
9. The system of claim 3, wherein the optocoupler assembly comprises a transmit optocoupler and a receive optocoupler; the coding disc grating is positioned between the transmitting optocoupler and the receiving optocoupler;
the transmitting optical coupler is arranged on the transmission assembly;
the receiving optocoupler is installed on the servo module.
10. An electric machine, comprising: a motor position detection system as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120687164.1U CN215419975U (en) | 2021-04-02 | 2021-04-02 | Motor position detection system and motor |
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| CN202120687164.1U CN215419975U (en) | 2021-04-02 | 2021-04-02 | Motor position detection system and motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008131A (en) * | 2021-04-02 | 2021-06-22 | 深圳市集堃科技有限公司 | Motor position detection system and motor |
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- 2021-04-02 CN CN202120687164.1U patent/CN215419975U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008131A (en) * | 2021-04-02 | 2021-06-22 | 深圳市集堃科技有限公司 | Motor position detection system and motor |
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