CN212909277U - Magnetic sensor system and electric machine - Google Patents
Magnetic sensor system and electric machine Download PDFInfo
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- CN212909277U CN212909277U CN202022065242.2U CN202022065242U CN212909277U CN 212909277 U CN212909277 U CN 212909277U CN 202022065242 U CN202022065242 U CN 202022065242U CN 212909277 U CN212909277 U CN 212909277U
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Abstract
The utility model relates to the field of magnetic sensors, in particular to a magnetic sensor system and a motor; the magnetic sensor system comprises two axial magnets, a magnetic sensor system and a control system, wherein the two axial magnets of the magnetic sensor system are symmetrically distributed on a preset rotating axis, the magnetic sensor is arranged on a preset plane perpendicular to the preset rotating axis, the preset rotating axis penetrates through the magnetic sensor, the N pole of one axial magnet faces the preset plane, and the S pole of the other axial magnet faces the preset plane; a motor provided with a magnetic sensor system can detect a rotation angle of a rotating shaft of the motor using the magnetic sensor system. The utility model discloses a magnetic sensor system and motor can be through assembling two axial magnet respectively to make two axial magnet respectively with the north pole and S utmost point orientation magnetic sensor place plane, ensure the uniformity of assembling two axial magnet positions, and ensure the uniformity of magnet polarity direction, make the initial position of the pivot of each motor the same, need not recalibrate, detect the initial position of motor shaft after the motor dispatches from the factory.
Description
Technical Field
The utility model relates to a magnetic sensor field particularly, relates to a magnetic sensor system and motor.
Background
In the related art, a magnetic sensor system is generally used to detect a rotation angle, a rotation speed, or the like of a power device such as a motor, for example: the rotation angle of the rotating shaft of the motor is detected by a magnetic sensor system.
However, the magnet of the magnetic sensor system provided in the related art is arranged in a non-directional manner, and when the magnetic sensor system is arranged in the motor, the magnet of the magnetic sensor system indirectly affects the initial position of the rotating shaft of the motor, and the initial position of the rotating shaft of the motor needs to be recalibrated and detected in a later stage, so that the labor cost for detection is increased, and the efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a magnetic sensor system and motor, the magnet setting mode of magnetic sensor system can not indirectly influence the initial position of the pivot of motor, and the initial position of the pivot of later stage need not recalibrate, detect the motor is favorable to reducing the cost of labor, raises the efficiency.
The embodiment of the utility model is realized like this:
in a first aspect, the embodiment of the utility model provides a magnetic sensor system, including magnetic sensor and two axial magnet, two axial magnet are in order to predetermine axis of rotation symmetric distribution, and magnetic sensor sets up on predetermineeing the plane with predetermineeing the axis of rotation vertically, and predetermine the axis of rotation and pass magnetic sensor, and wherein, along the direction of predetermineeing the axis of rotation, two axial magnet all with predetermine plane interval distribution, the N utmost point orientation of one of them axial magnet predetermines the plane, and the S utmost point orientation of another axial magnet predetermines the plane.
In an alternative embodiment, the two axial magnets are arranged in a central symmetry with respect to the predetermined axis of rotation.
In an optional embodiment, the magnetic sensor system further includes an adaptor, the adaptor is provided with two mounting grooves, the two mounting grooves are symmetrically distributed along a preset rotation axis, and the two axial magnets and the two mounting grooves are arranged in one-to-one correspondence; along the direction of predetermineeing the axis of rotation, magnetic sensor and adaptor interval set up.
In an alternative embodiment, the end faces of the two axial magnets facing the predetermined plane are flush with the surface of the adapter.
In an alternative embodiment, the two mounting slots meet.
In an alternative embodiment, the at least one axial magnet is circular in cross-section in a direction perpendicular to the predetermined axis of rotation.
In an alternative embodiment, the cross-sectional areas of the two axial magnets are the same in a direction perpendicular to the preset axis of rotation.
In an alternative embodiment, the two axial magnets are of the same length in the direction of the predetermined axis of rotation.
In a second aspect, an embodiment of the present invention provides a motor, including the magnetic sensor system of the preceding one, the magnetic sensor system is used for detecting a rotation angle of a rotating shaft of the motor.
In an optional implementation manner, the motor further includes a rotor and a stator housing, the stator housing is provided with an installation cavity, the rotor is disposed in the installation cavity and is coaxially connected to the rotating shaft, the rotating shaft extends out from a first end of the stator housing, a magnetic sensor of the magnetic sensor system is disposed at a second end of the stator housing, two axial magnets of the magnetic sensor system are disposed at one end of the rotor away from the rotating shaft, a rotation axis of the rotor is preset to coincide with a rotation axis of the rotating shaft, and the magnetic sensor is configured to detect a rotation angle of the two axial magnets so as to detect a rotation angle of the rotating shaft.
The utility model discloses magnetic sensor system's beneficial effect includes: the embodiment of the utility model provides a rotation angle that magnetic sensor system can be used for detecting the pivot of motor, it includes magnetic sensor and two axial magnet, two axial magnet are with predetermineeing axis of rotation symmetric distribution, magnetic sensor sets up on predetermineeing the plane with predetermineeing axis of rotation vertically, and predetermine the axis of rotation and pass magnetic sensor, wherein, along the direction of predetermineeing the axis of rotation, two axial magnet all with predetermineeing plane interval distribution, the plane is predetermine to one of them axial magnet' S the N utmost point orientation, the plane is predetermine to the S utmost point orientation of another axial magnet. The magnetic sensor system is matched with the two axial magnets through the magnetic sensor, the rotating angle of the rotating shaft of the motor can be determined by detecting the rotating angles of the two axial magnets, when the motor is assembled, the two axial magnets are symmetrically arranged on the motor by a preset rotating axis, the S pole and the N pole of each axial magnet face to a preset plane where the magnetic sensor is located, each motor is provided with the two axial magnets in the above mode, the consistency of the installation positions of the two axial magnets of the magnetic sensor system arranged on each motor can be ensured, the polarity directions of the magnets are consistent, namely, the relative position relation between the two axial magnets of each magnetic sensor system and the magnetic sensor on the preset rotating axis is consistent, the data collected by the magnetic sensors of each magnetic sensor system are the same, and further, the installation mode of the two axial magnets does not indirectly influence the initial position of the rotating shaft of the motor, the initial position of the rotating shaft of each motor provided with the magnetic sensor system is the same, the initial position of the rotating shaft of the motor does not need to be recalibrated and detected in the later period, labor cost is reduced, and efficiency is improved.
The utility model discloses beneficial effect of motor includes: the embodiment of the utility model provides a motor includes foretell magnetic sensor system; two axial magnets of magnetic sensor system are with the mode that sets up of predetermineeing axis of rotation symmetric distribution, can ensure the uniformity of the mounted position of two axial magnets that every motor set up, it is unanimous to guarantee magnet polarity direction, two axial magnets that every motor set up are unanimous with the relative position relation of magnetic sensor on predetermineeing the axis of rotation, the data that the magnetic sensor of every magnetic sensor system gathered are the same, and then make the mounted mode of two axial magnets can not indirectly influence the initial position of motor shaft, the initial position of the pivot of every motor that is provided with the magnetic sensor system promptly is the same, do not need later stage recalibration, detect the initial position of the pivot of motor, in order to reduce the cost of labor, and improve efficiency.
And the magnetic sensor system is used for detecting the rotating angle of the rotating shaft of the motor, and the two axial magnets are symmetrically distributed along the preset rotating axis, so that a uniform magnetic field can be generated, and the magnetic sensor arranged on the preset plane vertical to the preset rotating axis is favorable for accurately and stably detecting the rotating angle of the rotating shaft of the motor.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic partial structural diagram of a magnetic sensor system according to an embodiment of the present invention;
fig. 2 is an exploded schematic view of the motor according to the embodiment of the present invention;
FIG. 3 is a first exploded view of a motor according to the related art;
FIG. 4 is a schematic exploded view of a motor in the related art;
fig. 5 is a schematic diagram of a partial structure of a magnetic sensor system according to an embodiment of the present invention.
Icon: 010-a motor; 010 a-motor; 010 b-electric machine; 020-magnetic sensor system; 110-a rotor; 110 a-a rotor; 110 b-a rotor; 111-mounting grooves; 113-an adaptor; 120-axial magnet; a 121-N pole; 122-S pole; 200-a rotating shaft; 300-a stator housing; 310-a mounting cavity; 311-a first end of the stator housing; 312-a second end of the stator housing; 400-a magnetic sensor; 410-a circuit board; 420-a magnetic encoder; 500-presetting a rotation axis; 510-preset plane.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "inside" and "outside" are used for indicating the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the utility model is usually placed when using, and are only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the present embodiment provides a magnetic sensor system 020, which includes a magnetic sensor 400 and a magnet, wherein the magnetic sensor 400 is configured to detect a magnetic field generated by the magnet; specifically, the magnet can be used to interlock with an operating body (not shown) that performs a rotational operation, such as: the magnet is capable of moving in conjunction with the rotation shaft 200 of the motor 010, the relative positional relationship between the magnet and the magnetic sensor 400 changes on the rotation axis of the moving body, and the magnetic sensor 400 detects a physical quantity related to the relative positional relationship between the magnet and the magnetic sensor 400, for example: a rotation angle or a rotation speed of an operating body interlocked with the magnet is detected.
Hereinafter, the motor 010 will be described in detail with reference to the magnetic sensor system 020, in which the magnetic sensor system 020 is used to detect the rotation angle of the rotating shaft 200 of the motor 010. Of course, in other embodiments, the magnetic sensor system 020 may also be used for detecting a rotation angle of a steering wheel, a rotation angle of a wheel, and the like of an automobile, and is not particularly limited herein.
Referring to fig. 1, the magnetic sensor system 020 of the present embodiment includes a magnetic sensor 400 and two axial magnets 120, the two axial magnets 120 are symmetrically distributed about a predetermined rotation axis 500, the magnetic sensor 400 is disposed on a predetermined plane 510 perpendicular to the predetermined rotation axis 500, and the predetermined rotation axis 500 passes through the magnetic sensor 400, wherein along the direction of the predetermined rotation axis 500, the two axial magnets 120 are both spaced apart from the predetermined plane 510, an N-pole 121 of one axial magnet 120 faces the predetermined plane 510, and an S-pole 122 of the other axial magnet 120 faces the predetermined plane 510. It should be noted that the axes of the two axial magnets 120 are parallel to the preset rotation axis 500, and the magnetizing directions of the two axial magnets 120 are parallel to the direction of the preset rotation axis 500.
Referring to fig. 2, a motor 010 of the present embodiment includes a rotating shaft 200, a rotor 110, a stator housing 300 and the magnetic sensor system 020, wherein the stator housing 300 is provided with an installation cavity 310, the rotor 110 is disposed in the installation cavity 310, and the rotor 110 and the stator housing 300 can rotate relatively; the rotor 110 is coaxially coupled to the rotation shaft 200 and can be rotated with the rotor 110 in synchronization with respect to the stator housing 300.
Further, the rotation shaft 200 is extended from the first end 311 of the stator housing for connection with an external device to be driven; the magnetic sensor 400 of the magnetic sensor system 020 is disposed at the second end 312 of the stator housing, the two axial magnets 120 of the magnetic sensor system 020 are both disposed at one end of the rotor 110 away from the rotating shaft 200, and the preset rotation axis 500 coincides with the rotation axis of the rotating shaft 200, so that the two axial magnets 120 rotate around the same rotating shaft 200 along with the rotor 110 and the rotating shaft 200 synchronously, that is, the rotating shaft 200 can be regarded as the aforementioned acting body linked with the magnets, and it is ensured that the rotation angles of the two axial magnets 120 are consistent with the rotation angle of the rotating shaft 200, and the magnetic sensor 400 is configured to detect the rotation angles of the two axial magnets 120, so as to detect the rotation angle of the rotating.
Since the magnetic sensor system 020 cooperates with the two axial magnets 120 through the magnetic sensor 400, detecting the rotation angle of the two axial magnets 120 enables to determine the rotation angle of the rotating shaft 200 of the motor 010. During assembly, the two axial magnets 120 are respectively arranged on the rotor 110 with the preset rotation axis 500 as a symmetry axis, and the two axial magnets 120 respectively face the preset plane 510 where the magnetic sensor 400 is located with the S-pole 122 and the N-pole 121, each motor 010 is provided with the two axial magnets 120 in the above manner, which can ensure consistency of the installation positions of the two axial magnets 120 of the magnetic sensor system 020 arranged in each motor 010, ensure that the magnet polarity directions are consistent, that is, the two axial magnets 120 of each magnetic sensor system 020 are consistent with the relative positions of the magnetic sensor 400 on the preset rotation axis 500, and the data collected by the sensor magnetic 400 of each magnetic sensor system 020 are the same, so that the installation manner of the two axial magnets 120 does not indirectly affect the initial position of the rotor 110 of the motor 010, that is, the initial position of the rotating shaft 200 coaxially and fixedly connected with the rotor 110 is not indirectly affected, that is, the initial position of the rotating shaft 200 of each motor 010 provided with the magnetic sensor system 020 is the same, and the initial position of the rotating shaft 200 of the motor 010 does not need to be recalibrated and detected at a later stage.
That is to say, the two axial magnets 120 disposed at one end of the rotor 110 of each motor 010 away from the rotating shaft 200 are consistent with the magnetic sensor 400 in the relative position on the preset rotating axis 500, and the magnet polarity directions are consistent, when the initial position of the rotating shaft 200 of the motor 010 is detected by using the related software, the detection zero point positions preset in the software for the respective motors 010 are the same, that is, the software for detecting the initial position of the rotating shaft 200 of the motor 010 does not need to set different detection zero point positions for the respective motors 010, it can be confirmed that the initial positions of the rotating shafts 200 of the motors 010 disposed with the two axial magnets 120 in the embodiment are the same, that is, the initial positions of the rotating shafts 200 of the respective motors 010 do not need to be recalibrated and detected after the motors 010 leave the factory, which is.
Fig. 3 is a first exploded view of a motor 010a in the related art; fig. 4 is a schematic diagram illustrating an exploded structure of the motor 010b in the related art.
The motor provided in the related art adopts a single radially magnetized circular magnet installed at the tail end of the rotor, for example, the motor 010a provided in the related art shown in fig. 3 includes a circular magnet disposed at the end of the rotor 110a, and the circular magnet is radially magnetized such that one half circle is an N pole and the other half circle is an S pole, or, for example, the motor 010b provided in the related art shown in fig. 4 includes a ring magnet disposed at the outer periphery of the end of the rotor 110b, and the ring magnet is radially magnetized such that one half circle is an N pole and the other half circle is an S pole. Since the related art charges the single magnet in the radial direction to form the N pole and the S pole at the same time, when the single magnet charged in the radial direction is assembled at the end of the rotor, the N pole and the S pole of the magnet cannot be separately arranged on the rotor to be matched with the magnetic sensor, and a radial magnet having the N pole and the S pole is installed on the rotor in a non-directional manner, that is, when the radial magnet is assembled, each radial magnet may rotate around the rotation axis of the motor rotating shaft, so that the relative positions of each radial magnet and the rotation axis are different, specifically, the relative positions of the single radial magnet arranged on each motor and the magnetic sensor on the rotation axis are different, so that each motor is respectively provided with one magnet charged in the radial direction, and the installation positions of the N pole and the S pole of the radial magnet arranged on the rotor of each motor cannot be determined, the relative position of the N pole and the S pole of each radial magnet and the magnetic sensor on the rotation axis cannot be determined, the mounting position of the radial magnet mounted on the rotor of each motor cannot be consistent, the relative position of the rotor is indirectly influenced, namely, the initial position of the rotating shaft of each motor provided with the radial magnet is different, after the motor leaves a factory, the initial position of the rotating shaft of each motor needs to be recalibrated and detected, and because the mounting positions of the radial magnets arranged on the rotor of each motor are different, the polarity directions of the magnets are different, software for detecting the initial position of the rotating shaft needs to set corresponding detection zero positions aiming at each motor, the initial position of the rotating shaft of each motor can be accurately detected, the labor cost is increased, and the efficiency is reduced.
It should be noted that, the two axial magnets 120 are symmetrically distributed about the preset rotation axis 500, and the preset rotation axis 500 coincides with the rotation axis of the rotating shaft 200 of the motor 010, and the two axial magnets 120 can generate a uniform magnetic field, which is beneficial for the magnetic sensor 400 disposed on the preset plane 510 perpendicular to the preset rotation axis 500 to accurately and stably detect the rotation angle of the rotating shaft 200 of the motor 010.
Further, referring to fig. 1, the two axial magnets 120 are distributed in a central symmetry manner with a predetermined rotation axis 500; so set up, can make two radial magnet produce even magnetic field, be favorable to magnetic sensor 400 to detect two radial magnet synchronous pivoted rotation angles of pivot 200 and rotor 110 of linkage, and then detect the rotation angle of the pivot 200 of motor 010.
Optionally, the cross-section of the at least one axial magnet 120 is circular in a direction perpendicular to the preset rotation axis 500; so set up, be favorable to the installation and the fixed of axial magnet 120, and can help producing even magnetic field to magnetic sensor 400 carries out more accurate detection to the rotation angle of rotating shaft 200.
In this embodiment, the cross-section of the two axial magnets 120 is circular along a direction perpendicular to the predetermined rotation axis 500, that is, the two axial magnets 120 may be cylindrical magnets or disk-shaped magnets. With this arrangement, the consistency of the mounting positions of the two axial magnets 120 on the rotor 110 can be ensured, thereby ensuring the consistency of the polarities of the magnets, and facilitating the generation of a uniform magnetic field, which facilitates more accurate detection by the magnetic sensor 400.
Of course, in other embodiments, the cross section of the axial magnet 120 along the direction perpendicular to the preset rotation axis 500 may also be an ellipse, a sector, etc., and is not limited in particular.
Further, the cross-sectional areas of the two axial magnets 120 are equal in a direction perpendicular to the preset rotation axis 500. On the one hand, the consistency of the mounting positions of the two axial magnets 120 on the rotor 110 of each motor 010 is ensured to ensure the consistency of the polarities of the magnets, and on the other hand, the consistency of the magnetic fields generated by the two axial magnets 120 is ensured to ensure the consistency of the rotation angle of the rotating shaft 200 detected by the magnetic sensor 400.
Optionally, the length of the two axial magnets 120 in the magnetic sensor system 020 is the same in the direction of the preset rotation axis 500 to ensure that the two axial magnets 120 generate a uniform magnetic field.
In a preferred embodiment, the two axial magnets 120 are identical in shape and size, and can effectively ensure that they generate a uniform magnetic field, so that the magnetic sensor 400 can perform more accurate detection, and thus a more accurate rotation angle of the rotating shaft 200 can be obtained.
Optionally, referring to fig. 5, the magnetic sensor system 020 further includes an adaptor 113, the adaptor 113 is provided with two mounting grooves 111, the two mounting grooves 111 are symmetrically distributed along a preset rotation axis 500, and the two axial magnets 120 and the two mounting grooves 111 are arranged in a one-to-one correspondence manner; the magnetic sensor 400 is spaced from the adaptor 113 in the direction of the predetermined rotation axis 500. So set up, can set up two axial magnets 120 in adaptor 113 earlier after, will be provided with adaptor 113 of two axial magnets 120 and install in the one end that rotor 110 kept away from pivot 200 again, and then need not set up the groove that is used for installing axial magnet 120 at rotor 110, simplify the processing of rotor 110 for two axial magnets 120 can carry out modular assembly through adaptor 113.
Further, the end faces of the two axial magnets 120 facing the preset plane 510 are flush with the surface of the adaptor 113. With this arrangement, the uniformity of the magnetic fields generated by the two axial magnets 120 can be ensured, and the accuracy of the rotation angle of the rotating shaft 200 detected by the magnetic sensor 400 according to the magnetic fields can be ensured.
In a preferred embodiment, the mounting groove 111 is adapted to the axial magnet 120, that is, the cross-sectional shape and size of the mounting groove 111 are adapted to the axial magnet 120, so that the axial magnet 120 can be stably disposed in the mounting groove 111.
Further, the two mounting grooves 111 are connected; specifically, the two mounting grooves 111 are distributed in an externally-tangent manner, and the joint of the two mounting grooves 111 coincides with the preset rotation axis 500. With this arrangement, uniformity of magnetic fields generated by the two axial magnets 120 can be ensured, in addition to uniformity of mounting positions of the two axial magnets 120.
Of course, in other embodiments, the mounting groove 111 may not be adapted to the axial magnet 120, that is, the cross-sectional shape of the mounting groove 111 may not be the same as the cross-sectional shape of the axial magnet 120, for example: the cross-sectional shape of the mounting groove 111 may be square, and four sidewalls of the square mounting groove 111 are abutted against the axial magnet 120.
It should be noted that, the connection of the two mounting grooves 111 may mean that the peripheries of the two circular grooves are connected, that is, the section of the center of the two mounting grooves 111 is a circle that is tangent to the predetermined rotation axis 500, and the connection of the peripheries of the two circular grooves intersects the predetermined rotation axis 500, that is, the connection of the peripheries of the two circular grooves intersects the rotation axis of the rotating shaft 200, so as to ensure that the two axial magnets 120 generate a uniform magnetic field.
It should be understood that the adapter 113 for installing the two axial magnets 120 is not an essential part for assembling the magnetic sensor system 020, for example, when the magnetic sensor system 020 is assembled on the motor 010, the adapter 113 may not be provided, but two installation grooves 111 may be directly formed at one end of the rotor 110 far away from the rotating shaft 200, and the two axial magnets 120 may be directly installed in the installation grooves 111 formed in the rotor 110; that is, if the adaptor 113 for mounting the two axial magnets 120 is not separately provided, but the rotor 110 is directly provided with the two mounting grooves 111 for mounting the axial magnets 120, the rotor 110 may be directly regarded as the adaptor 113.
It should be noted that, no matter two mounting grooves 111 are formed in the adaptor 113 for mounting the two axial magnets 120, or two mounting grooves 111 are directly formed in the rotor 110 for mounting the axial magnets 120, when the magnetic sensor system 020 is mounted, the two axial magnets 120 are respectively mounted in the respective corresponding mounting grooves 111, and the N-pole 121 of one of the axial magnets 120 faces the preset plane 510, and the S-pole 122 of the other axial magnet 120 faces the preset plane 510, so that when the two axial magnets 120 of the magnetic sensor system 020 are mounted, the mounting positions of the two axial magnets 120 are determined, specifically, when the two axial magnets 120 are mounted, the mounting positions of the two axial magnets 120 facing the preset plane 510 respectively with the N-pole 121 and the preset plane 510 with the S-pole 122 can be determined, and further, each motor 010 on which the magnetic sensor system 020 is mounted can mount the two axial magnets 120 in the same manner, the consistency of the magnet polarity directions of each motor 010 is ensured, so that the assembly of the magnets does not generate indirect influence on the relative position of the rotating shaft 200, the initial position of the rotating shaft 200 of each motor 010 can be determined to be the same, the detection of the initial position of the rotating shaft 200 of the motor 010 can be simplified, the corresponding detection zero position does not need to be set for each motor 010, and the initial position of the rotating shaft 200 of the motor 010 does not need to be recalibrated and detected after the motor 010 leaves a factory.
Note that, if the two axial magnets 120 are mounted on the rotor 110 by using the adapter 113, the connection manner of the adapter 113 and the rotor 110 may be welding, clamping, or the like, and is not particularly limited herein.
Of course, the manner of fixing the two axial magnets 120 to the respective mounting grooves 111 may be selected as needed as long as the magnetic fields generated by the two are not adversely affected, for example: may be interference fit, snap fit, fixed with glue, etc., and is not specifically limited herein.
Optionally, referring to fig. 2, the magnetic sensor 400 of the present embodiment includes a circuit board 410 and a magnetic encoder 420 disposed on the circuit board 410, the circuit board 410 is disposed at the second end 312 of the stator housing, and the magnetic encoder 420 can cooperate with the two axial magnets 120 to detect the rotation angles of the two axial magnets 120, that is, the rotation angles of the rotor 110 and the rotating shaft 200.
Optionally, the circuit board 410 is disposed at a side of the second end 312 of the stator housing facing the mounting cavity 310, that is, the circuit board 410 is disposed at an inner wall of the stator housing 300, and the magnetic encoder 420 is also located at an inner side of the stator housing 300.
Optionally, the motor 010 may further include an end cap (not shown), the end cap being disposed at the second end of the stator housing 300, the magnetic sensor 400 being disposed at a side of the end cap facing the mounting cavity 310; specifically, the circuit board 410 is connected to the end cap by using a fastener such as a screw, which is not limited in this respect.
It should be noted that the magnetic encoder 420 is a chip, and it can be soldered to the circuit board 410, and the circuit board 410 can be fixedly connected to the stator housing 300 by a fastener such as a bolt or a screw; of course, the connection manner of the magnetic encoder 420 and the circuit board 410 and the connection manner of the circuit board 410 and the stator housing 300 are not limited thereto.
It is further noted that the magnetic encoder 420 is spaced from the axial magnet 120 along the predetermined rotational axis 500, but care should be taken to ensure that the axial magnet 120 is within the sensing range of the magnetic encoder 420.
It should be noted that the principle of the magnetic encoder for detecting the angle of the rotating shaft is similar to the related art, and will not be described in detail here, and the principle is roughly as follows: the magnetic encoder can set the number of UVW poles, the physics of U: the voltage is called potential difference or potential difference, and is a physical quantity for measuring the energy difference of unit charge generated by different potentials in an electrostatic field, the magnitude of the physical quantity is equal to the work of the unit positive charge moving from one point to another point under the action of the electric field force, and the direction of the voltage is defined as the direction from high potential to low potential. The physical significance of V: if an ampere of current flows on a uniform, constant temperature and width wire, the resistance of the wire converts the electrical energy to heat over a distance, the voltage difference between which is defined as one volt. The physical significance of W: the electric power represents the physical quantity of the current working speed, and the magnitude of the power of an electric appliance is numerically equal to the electric energy consumed by the electric appliance within 1 second. The number of poles may be any value between 1 and 32. Each pair of poles of the motor generates a periodic sine and cosine signal and is converted into an orthogonal or serial position signal, namely, two axial magnets arranged on a rotor of the motor generate a periodic sine and cosine signal and are converted into orthogonal or serial position signals, and the magnetic encoder is used for detecting the signals, namely, the magnetic encoder detects the change of the magnetic poles of the rotor and detects the angle of the rotor, thereby realizing the detection of the rotating angle of the rotating shaft.
It should be noted that the motor 010 of the present embodiment can be used to provide driving force to various devices, such as: the rotating shaft 200 of the motor 010 is in transmission connection with a propeller of the unmanned aerial vehicle so as to provide driving force for the propeller of the unmanned aerial vehicle by using the motor 010, or the rotating shaft 200 of the motor 010 is in transmission connection with wheels of the unmanned vehicle so as to provide driving force for the wheels of the unmanned vehicle by using the motor 010, and the like, namely the rotating shaft 200 is used for being connected with external devices to be driven, such as the propeller of the unmanned aerial vehicle, the wheels of the unmanned vehicle and the like; and is not particularly limited herein.
When the magnetic sensor system 020 provided in the present embodiment is assembled to the motor 010, the two axial magnets 120 may be respectively disposed in the respective corresponding mounting grooves 111, that is, when each motor 010 is assembled, the consistency of the mounting positions of the two axial magnets 120 of each motor 010 is ensured.
To sum up, the utility model provides a motor 010 is when assembling two axial magnet 120 of magnetic sensor system 020, just ensure the uniformity of the mounted position of two axial magnet 120 of each motor 010, can guarantee the uniformity of the magnet polarity direction of every motor 010, two axial magnet and the magnetic sensor of every magnetic sensor system are unanimous in the relative position relation of predetermineeing on the axis of rotation promptly, make the initial position of every motor 010's pivot 200 the same, need not recalibrate, detect the initial position of pivot 200 including motor 010 after motor 010 dispatches from the factory, in order to reduce the cost of labor, and can raise the efficiency.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a magnetic sensor system, its characterized in that includes magnetic sensor and two axial magnets, two axial magnets is in order to predetermine axis of rotation symmetric distribution, magnetic sensor set up in with predetermine on the perpendicular plane of predetermineeing of axis of rotation, just predetermine the axis of rotation and pass magnetic sensor, wherein, follow predetermine the direction of axis of rotation, two axial magnets all with predetermine plane interval distribution, one of them axial magnets 'S the N utmost point orientation predetermine the plane, another axial magnets' S the S utmost point orientation predetermine the plane.
2. The magnetic sensor system of claim 1, wherein the two axial magnets are arranged symmetrically about the predetermined axis of rotation.
3. The magnetic sensor system of claim 1, further comprising an adaptor, wherein the adaptor is formed with two mounting slots, the two mounting slots are symmetrically distributed along the preset rotation axis, and the two axial magnets are disposed in one-to-one correspondence with the two mounting slots; and the magnetic sensor and the adapter are arranged at intervals along the direction of the preset rotating axis.
4. A magnetic sensor system according to claim 3, wherein the end faces of both of said axial magnets facing said predetermined plane are flush with the surface of said adaptor.
5. A magnetic sensor system according to claim 3, wherein two of said mounting slots meet.
6. A magnetic sensor system according to claim 1, wherein at least one of said axial magnets is circular in cross-section in a direction perpendicular to said predetermined axis of rotation.
7. A magnetic sensor system according to claim 1, wherein the cross-sectional areas of the two axial magnets are the same in a direction perpendicular to the predetermined axis of rotation.
8. A magnetic sensor system according to claim 1, wherein the length of both of said axial magnets is the same in the direction of said predetermined axis of rotation.
9. An electrical machine comprising a magnetic sensor system according to any of claims 1-8 for detecting the angle of rotation of a rotating shaft of the electrical machine.
10. The motor of claim 9, wherein the motor further comprises a rotor and a stator housing, the stator housing is provided with a mounting cavity, the rotor is disposed in the mounting cavity and coaxially connected to the rotating shaft, the rotating shaft extends from the first end of the stator housing, the magnetic sensor of the magnetic sensor system is disposed at the second end of the stator housing, two axial magnets of the magnetic sensor system are disposed at one end of the rotor away from the rotating shaft, the preset rotating axis coincides with the rotating axis of the rotating shaft, and the magnetic sensor is configured to detect a rotating angle of the two axial magnets so as to detect the rotating angle of the rotating shaft.
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| CN202022065242.2U CN212909277U (en) | 2020-09-18 | 2020-09-18 | Magnetic sensor system and electric machine |
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| CN202022065242.2U CN212909277U (en) | 2020-09-18 | 2020-09-18 | Magnetic sensor system and electric machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115313749A (en) * | 2022-10-11 | 2022-11-08 | 沈阳微控新能源技术有限公司 | Flywheel energy storage device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115313749A (en) * | 2022-10-11 | 2022-11-08 | 沈阳微控新能源技术有限公司 | Flywheel energy storage device |
| CN115313749B (en) * | 2022-10-11 | 2023-03-14 | 沈阳微控新能源技术有限公司 | Flywheel energy storage device |
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Address after: 510000 Block C, 115 Gaopu Road, Tianhe District, Guangzhou City, Guangdong Province Patentee after: Guangzhou Jifei Technology Co.,Ltd. Address before: 510000 Block C, 115 Gaopu Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: Guangzhou Xaircraft Technology Co.,Ltd. |