CN217135341U - Hall induction magnet ring, position sensor and brushless motor - Google Patents
Hall induction magnet ring, position sensor and brushless motor Download PDFInfo
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- CN217135341U CN217135341U CN202122791823.9U CN202122791823U CN217135341U CN 217135341 U CN217135341 U CN 217135341U CN 202122791823 U CN202122791823 U CN 202122791823U CN 217135341 U CN217135341 U CN 217135341U
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Abstract
The magnetic ring base is provided with a rotating shaft mounting hole and N magnetic block placing grooves distributed along the circumferential direction of the rotating shaft mounting hole; n is an integer greater than or equal to 1; the magnetic block is arranged in the magnetic block placing groove through a clamping structure. On the magnetic ring base, N magnetic block standing grooves are arranged along the circumferential direction of the rotating shaft mounting hole, the number of the magnetic block standing grooves is equal to that of the magnetic blocks, and the number of the magnetic block standing grooves and the number of the magnetic blocks can be correspondingly increased or reduced according to the number of magnetic pole pairs required in an application scene. Meanwhile, the magnetic block is arranged in the magnetic block placing groove through a clamping structure, so that the magnetic block can be detached from the magnetic block base again, the magnetic block can be recycled, and the universality of the magnetic block is improved.
Description
Technical Field
The application relates to the technical field of brushless direct current motor control, in particular to a Hall sensing magnetic ring, a position sensor and a brushless motor.
Background
In practical application, a brushless motor and some constant speed motors often need to use a hall induction magnetic ring. The Hall induction magnetic ring is generally a multi-stage magnetic ring and comprises a plurality of magnetic poles, and the working principle of the Hall induction magnetic ring is that the Hall induction magnetic ring induces the Hall sensor by the plurality of magnetic poles of the magnetic ring to generate a pulse signal. The Hall sensors are arranged at the edges of the magnetic rings, and magnetic poles on the magnetic rings can pass through the induction areas of the Hall sensors in turn when the magnetic rings rotate. If the magnetic ring is provided with 1 pair of magnetic poles, when the magnetic ring rotates for one circle, the Hall sensor can sense 2 pulse signals. Therefore, by measuring the number of pulse signals in a certain period of time, the number of revolutions of the rotor in the measured period of time can be obtained, and the number of revolutions of the rotor in the period of time can be calculated from the number of revolutions. Because the pulse signal generated by the rotation of the rotor is a periodic pulse function, the deflection angle of the rotor at the current moment can be determined according to the serial number of the pulse signal at the current moment in a period.
In the practical application of the brushless motor, the brushless dc motor converts the dc power into the ac power through the current commutation circuit, and the frequency of the ac power needs to be matched with the rotation speed of the rotor. Therefore, the brushless motor needs to be provided with a position sensor for measuring the rotation speed and the deflection angle of the rotor. In the prior art, a position sensor of a brushless motor includes a hall sensor and a hall sensing magnetic ring. The Hall sensing magnetic ring is sleeved on a rotor shaft of the motor, and the Hall sensor is arranged on the periphery of the Hall sensing magnetic ring.
In the position sensor described above, the number of pairs of magnetic poles of the hall-effect magnetic ring determines the measurement accuracy of the position sensor. In different application scenes, in order to balance the precision and the cost, the number of the magnetic pole pairs of the Hall induction magnetic ring needs to be customized according to the precision requirements of different devices. The Hall induction magnetic ring in the prior art is usually integrally formed, the number of the magnetic poles of the Hall induction magnetic ring is determined after the Hall induction magnetic ring is manufactured, and the universality is low.
Therefore, in order to increase the versatility of the hall induction magnetic ring, it is necessary to design a magnetic ring with a detachable magnetic block.
SUMMERY OF THE UTILITY MODEL
To overcome the problems in the related art, the present application provides a hall induction magnetic ring 320, which includes a magnetic ring base 100 and N magnetic blocks 200:
the magnetic ring base 100 is provided with a rotating shaft mounting hole 120 and N magnetic block placing grooves 110 distributed along the circumferential direction of the rotating shaft mounting hole 120; n is an integer greater than or equal to 1; the magnetic block 200 is disposed in the magnetic block placing groove 110 by a snap-fit structure.
In one embodiment, at least one limiting slot 111 is disposed in the magnetic block placement groove 110, a limiting buckle 210 adapted to the limiting slot 111 is disposed on the magnetic block 200, and the magnetic block 200 is disposed in the magnetic block placement groove 110 through a clamping structure formed by the limiting buckle 210 and the limiting slot 111.
In one embodiment, the position-limiting clamping groove 111 is disposed on a side wall of the magnetic block placing groove 110, and a plane of the side wall is perpendicular to a circumferential direction of the rotating shaft mounting hole 120; the depth direction of the limiting clamping groove 111 is perpendicular to the radial direction of the rotating shaft mounting hole 120.
In one embodiment, the position limiting buckle 210 is a position limiting protrusion, the position limiting protrusion is provided with a guide surface 211, the guide surface 211 intersects with the installation direction of the magnetic block 200, and the installation direction is the direction in which the magnetic block 200 is inserted into the magnetic block placing groove 110.
In one embodiment, the magnetic block 200 is an arc-shaped magnetic block 200, the arc-shaped magnetic block 200 is disposed around the center of the rotating shaft mounting hole 120, and N arc-shaped magnetic blocks 200 are disposed around the circumference of the rotating shaft mounting hole 120 to form a hall sensing magnetic ring 320.
In one embodiment, the arc-shaped magnetic block 200 includes two limiting fasteners 210, and the two limiting fasteners 210 are respectively disposed at two ends of the arc-shaped magnetic block 200 along the arc length direction.
In one embodiment, the hall sensing magnetic ring is a bipolar magnetic ring, which comprises 2 magnetic blocks 200;
or, the hall sensing magnetic ring 320 is a three-pair magnetic ring, and the three-pair magnetic ring includes 3 magnetic blocks 200.
The second aspect of the present application provides a position sensor, which includes a hall sensor 310 and a hall induction magnetic ring 320 described in the first aspect of the present application:
the hall sensor 310 is arranged close to the radial edge of the magnetic ring, and the hall sensor 310 is used for sensing the magnetic poles of the magnetic block 200 to generate pulse signals; the hall sensing magnetic ring 320 is sleeved on the rotating shaft of the motor.
A third aspect of the present application provides a brushless motor comprising a current commutation circuit, a processor, and a position sensor 300 according to the second aspect of the present application:
the position sensor 300 is used for generating a pulse signal reflecting the deflection angle of the motor rotor 400; the processor is used for calculating the rotating speed and the deflection angle of the motor rotor 400 according to the pulse signals of the position sensor 300; the processor is further configured to control the current commutation circuit; the current commutation circuit is used for changing the flowing direction of current.
The technical scheme provided by the application can comprise the following beneficial effects:
the brushless motor comprises a stator, a rotor and a rotating shaft, wherein the circumference of the rotating shaft penetrates through the circle centers of the stator and the rotor and is fixedly connected with the rotor; when the rotor rotates, the rotor drives the rotating shaft to rotate synchronously. The brushless motor supplies alternating current with proper frequency to the stator through a current reversing circuit so as to drive the rotor to rotate.
The application provides a hall response magnetic ring 320, be fixed in the pivot, with rotor synchronous revolution, hall response magnetic ring 320 includes magnetic ring base 100 and a N magnetic path 200:
the magnetic ring base 100 is provided with a rotating shaft mounting hole 120, the magnetic ring is sleeved on the rotating shaft through the rotating shaft mounting hole 120, the magnetic ring base 100 is fixedly connected with the rotating shaft, and when the rotating shaft rotates, the magnetic ring base 100 is driven to synchronously rotate.
On the magnetic ring base 100, the N magnetic block placing grooves 110 are arranged along the circumferential direction of the rotating shaft mounting hole 120, the number of the magnetic block placing grooves 110 is equal to that of the magnetic blocks 200, and the number of the magnetic block placing grooves 110 and the number of the magnetic blocks 200 can be correspondingly increased or decreased according to the number of magnetic pole pairs required in an application scene.
Meanwhile, the magnetic block 200 is arranged in the magnetic block placing groove 110 through a clamping structure, so that the magnetic block 200 can be detached from the base of the magnetic block 200 again, the magnetic block 200 can be reused, and the universality of the magnetic block 200 is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
Fig. 1 is a schematic structural diagram of a hall induction magnetic ring according to an embodiment of the present application;
fig. 2 is another structural schematic diagram of a hall induction magnetic ring shown in the embodiment of the present application;
FIG. 3 is a schematic diagram of a magnetic block structure of the Hall sensing magnetic ring shown in FIG. 1;
fig. 4 is a schematic structural diagram of a position sensor and a brushless motor according to an embodiment of the present application.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Example one
In a brushless motor, in order to sense a deflection angle of a rotor in real time, a position sensor is generally provided on a rotating shaft of the motor. The most common position sensor comprises a hall induction magnetic ring and a hall inductor. The Hall induction magnetic ring is sleeved on a rotor shaft of the motor and rotates synchronously with the rotor; when the Hall sensing magnetic ring rotates, the magnetic block arranged on the Hall sensing magnetic ring is driven to rotate, and the magnetic shaft of the magnetic block generates a pulse signal through the sensing area of the Hall sensor. In the process that the Hall induction magnetic ring rotates repeatedly, a pulse signal generated by the Hall inductor forms a periodic function reflecting the deflection angle of the rotor, and the rotating speed and the deflection angle of the rotor can be calculated according to the periodic function.
The existing hall induction magnetic ring is usually an injection molding magnetic ring or a ceramic composite magnetic ring, and both are integrally formed structures. When the injection molding magnetic ring or the ceramic composite magnetic ring is produced, the number of the magnetic shafts in the magnetic ring needs to be designed according to the number of the magnetic shafts required in an application scene, so once the production is finished, the injection molding magnetic ring or the ceramic composite magnetic ring is only suitable for a single application scene, and the number of the magnetic shafts cannot be changed according to the application scene.
In order to overcome the technical problem that the number of magnetic axes of the conventional magnetic ring cannot be adjusted, an embodiment of the present application provides a hall induction magnetic ring, which is shown in fig. 1 and 3 and includes a magnetic ring base 100 and N magnetic blocks 200:
the magnetic ring base 100 is provided with a rotating shaft mounting hole 120 and N magnetic block placing grooves 110 distributed along the circumferential direction of the rotating shaft mounting hole 120; n is an integer greater than or equal to 1; the magnetic block 200 is disposed in the magnetic block placing groove 110 by a snap-fit structure.
Further, the hall induction magnetic ring is a bipolar magnetic ring, and the bipolar magnetic ring comprises 2 magnetic blocks 200; or, the hall sensing magnetic ring 320 is a three-pair magnetic ring, and the three-pair magnetic ring includes 3 magnetic blocks 200.
Illustratively, the hall induction magnetic ring 320 of the embodiment of the present application is a three-pair pole magnetic ring.
Specifically, referring to fig. 2, in the three pairs of pole magnetic rings, 3 magnetic blocks 200 are uniformly arranged along the circumferential direction of the rotating shaft mounting hole 120, that is, each magnetic block 200 is spaced by 120 degrees in the circumferential direction.
When the magnetic ring rotates one cycle, the magnetic axes of the 3 magnetic blocks 200 pass through the sensing area of the hall sensor 310, and 3 pulse signals are generated. Therefore, the pulse signals generated by the three pairs of magnetic pole rings along with the rotation of the rotor can be expressed as periodic functions. Wherein, 3 pulse signals generated by 3 magnetic rings are included in one period.
Therefore, the time required for one rotation of the current rotor, namely the rotating speed, can be determined by calculating the value of the period number of the periodic function. Meanwhile, 3 pulse signals in one period are sequenced, and when the pulse signals are detected, the current time and the serial number of the pulse signals at the current time are acquired, so that the deflection angle of the rotor at the current time can be determined. When the rotor deflects 180 degrees, the brushless motor can change the current direction in time and continuously drive the rotor to rotate.
In practical application, the brushless motor comprises a stator, a rotor and a rotating shaft, wherein the rotating shaft axially penetrates through the centers of the stator and the rotor and is fixedly connected with the rotor; when the rotor rotates, the rotor drives the rotating shaft to rotate synchronously. The brushless motor supplies alternating current with proper frequency to the stator through a current reversing circuit so as to drive the rotor to rotate.
In the embodiment of the present application, the hall induction magnetic ring 320 is fixed on the rotating shaft and rotates synchronously with the rotor, and the hall induction magnetic ring 320 includes a magnetic ring base 100 and N magnetic blocks 200; the magnetic ring base 100 is provided with a rotating shaft mounting hole 120, the magnetic ring is sleeved on the rotating shaft through the rotating shaft mounting hole 120, the magnetic ring base 100 is fixedly connected with the rotating shaft, and when the rotating shaft rotates, the magnetic ring base 100 is driven to synchronously rotate.
On the magnetic ring base 100, the N magnetic block placing grooves 110 are arranged along the circumferential direction of the rotating shaft mounting hole 120, the number of the magnetic block placing grooves 110 is equal to that of the magnetic blocks 200, and the number of the magnetic block placing grooves 110 and the number of the magnetic blocks 200 can be correspondingly increased or decreased according to the number of magnetic pole pairs required in an application scene.
Meanwhile, the magnetic block 200 is arranged in the magnetic block placing groove 110 through a clamping structure, so that the magnetic block 200 can be detached from the base of the magnetic block 200 again, the magnetic block 200 can be reused, and the universality of the magnetic block 200 is improved.
Example two
In the hall induction magnetic ring in the first embodiment, the magnetic block placing groove 110 and the magnetic block 200 are installed by a clamping structure, and to specifically describe the implementation manner of the clamping structure, the embodiment of the present application provides a hall induction magnetic ring, which is shown in fig. 1 and 3, and includes a magnetic ring base 100 and N magnetic blocks 200:
the magnetic ring base 100 is provided with a rotating shaft mounting hole 120 and N magnetic block placing grooves 110 distributed along the circumferential direction of the rotating shaft mounting hole 120; n is an integer greater than or equal to 1; the magnetic block 200 is disposed in the magnetic block receiving groove 110 by a snap-fit structure.
Further, at least one limiting clamping groove 111 is arranged in the magnetic block placing groove 110, a limiting buckle 210 matched with the limiting clamping groove 111 is arranged on the magnetic block 200, and the magnetic block 200 is arranged in the magnetic block placing groove 110 through a clamping structure formed by the limiting buckle 210 and the limiting clamping groove 111.
Further, the limiting clamping groove 111 is disposed on a side wall of the magnetic block placing groove 110.
Specifically, the plane of the sidewall is perpendicular to the circumferential direction of the rotating shaft mounting hole 120;
specifically, the depth direction of the limiting clamping groove 111 is perpendicular to the radial direction of the rotating shaft mounting hole 120.
Further, the direction of the magnetic block 200 inserted into the magnetic block placing groove 110 is parallel to the radial direction of the rotation shaft mounting hole 120.
It should be noted that the direction of inserting the magnetic block 200 into the magnetic block placing groove 110 according to the embodiment of the present application is illustrative and not limiting.
In this application embodiment, because magnetic block 200 places in magnetic block standing groove 110, when the magnetic ring rotated, magnetic block 200 received the effect of centrifugal force, did not have stop gear's the condition under, can be got rid of by centrifugal force and fly away from magnetic block standing groove 110.
Therefore, the magnetic block placing groove 110 is provided with at least one limiting clamping groove 111; the magnetic block 200 is provided with limiting buckles 210 with the same number as the limiting clamping grooves 111; the shape of the limiting clamping groove 111 is matched with that of the limiting clamping groove 111.
When the magnetic block 200 is mounted in the magnetic block placing groove 110, the clamping structure is combined, and the depth direction of the limiting clamping groove 111 is perpendicular to the radial direction of the rotating shaft mounting hole 120, so that the clamping structure is perpendicular to the centrifugal force direction applied to the magnetic block 200, and the clamping structure can prevent the magnetic block 200 from moving in the centrifugal force direction, and prevent the magnetic block 200 from falling off.
Further, referring to fig. 3, the limiting buckle 210 is a limiting protrusion, the limiting protrusion is provided with a guiding surface 211, the guiding surface 211 intersects with an installation direction of the magnetic block 200, and the installation direction is a direction in which the magnetic block 200 is inserted into the magnetic block placing groove 110.
Specifically, in order to facilitate the installation of the magnetic block 200 in the magnetic block placing groove 110, the limiting buckle 210 is configured to be a convex structure.
In the embodiment of the present application, the limiting protrusion is further provided with a guiding surface 211, and the guiding surface 211 is a rectangular inclined surface, and the rectangle includes two sides perpendicular to the radial direction of the rotating shaft mounting hole 120. Wherein, one side far away from the rotating shaft mounting hole 120 in the radial direction inclines towards the limiting clamping groove 111.
Further, the magnetic block placing groove 110 is made of an elastic material.
Specifically, the magnetic block placing groove 110 is made of nylon.
When the magnetic block 200 is inserted into the magnetic block placing groove 110, the limiting protrusions abut against the groove edge of the magnetic block placing groove 110, the limiting protrusions extrude the magnetic block placing groove 110, the magnetic block placing groove 110 is deformed, and the limiting protrusions reach the limiting clamping grooves 111 along the side wall of the magnetic block placing groove 110. When the limiting protrusion completely enters the limiting clamping groove 111, the magnetic block placing groove 110 recovers the original shape, the limiting protrusion (namely, the limiting buckle 210) and the limiting clamping groove 111 form a clamping structure, and the magnetic block 200 is installed.
Further, the magnetic blocks 200 are arc-shaped magnetic blocks 200, the arc-shaped magnetic blocks 200 are arranged with the center of the hole of the rotating shaft mounting hole 120 as the center of circle, and the N arc-shaped magnetic blocks 200 are arranged around the circumference of the rotating shaft mounting hole 120 to form the hall induction magnetic ring 320.
Further, the arc-shaped magnetic block 200 comprises two limiting buckles 210, and the two limiting buckles 210 are respectively arranged at two ends of the arc-shaped magnetic block 200 along the arc length direction.
When the magnetic ring is assembled, the limiting buckle 210 of the magnetic block 200 abuts against the groove edge of the magnetic block placing groove 110, and the limiting buckle 210 of the magnetic block 200 corresponds to the limiting clamping groove 111 of the magnetic block placing groove 110 in position; the magnetic blocks 200 are pressed towards the inside of the magnetic block placing groove 110, the limiting buckle 210 slides into the magnetic block placing groove 110 along the side wall of the magnetic block placing groove 110, when the limiting buckle 210 completely enters the limiting clamping groove 111, the clamping structure combination is completed, and the N magnetic blocks 200 form the Hall sensing magnetic ring 320.
In the embodiment of the present application, the magnetic block 200 is installed in the magnetic block placing groove 110 through a clamping structure, and the magnetic block 200 is prevented from being thrown off by a centrifugal force when rotating through the clamping structure, so that the magnetic ring is damaged. When the number of the magnetic blocks 200 needs to be increased for the hall induction magnetic ring 320, only the type of the magnetic ring base 100 needs to be replaced, and the magnetic blocks 200 are installed on the magnetic ring base 100, so that the waste of the magnetic ring is reduced.
EXAMPLE III
The hall induction magnetic ring described in the first and second embodiments of the present application is a component of the position sensor, and is used to specifically describe a setting manner of the hall induction magnetic ring in the position sensor.
The embodiment of the present application provides a position sensor 300, referring to fig. 4, including a hall sensor 310 and a hall induction magnetic ring 320 according to the first aspect of the present application: the hall sensor 310 is arranged close to the radial edge of the magnetic ring, and the hall sensor 310 is used for sensing the magnetic poles of the magnetic block 200 to generate pulse signals; the hall sensing magnetic ring 320 is sleeved on the rotating shaft of the motor.
Example four
The position sensor 300 according to the third embodiment of the present application is used for monitoring the rotation speed and the deflection angle of the motor rotor in real time.
To specifically illustrate the arrangement of the position sensor 300 in the motor, the third aspect of the present application provides a brushless motor, which, referring to fig. 4, includes a current commutation circuit, a processor, and the position sensor 300 of the second aspect of the present application: the position sensor 300 is used for generating a pulse signal reflecting the deflection angle of the motor rotor 400; the processor is used for calculating the rotating speed and the deflection angle of the motor rotor 400 according to the pulse signal of the position sensor 300; the processor is further configured to control the current commutation circuit; the current commutation circuit is used for changing the flowing direction of current.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (9)
1. The Hall induction magnetic ring is characterized by comprising a magnetic ring base (100) and N magnetic blocks (200):
the magnetic ring base (100) is provided with a rotating shaft mounting hole (120) and N magnetic block placing grooves (110) which are distributed along the circumferential direction of the rotating shaft mounting hole (120); n is an integer greater than or equal to 1;
the magnetic block (200) is arranged in the magnetic block placing groove (110) through a clamping structure.
2. The Hall sensing magnetic ring as claimed in claim 1,
at least one limiting clamping groove (111) is arranged in the magnetic block placing groove (110), a limiting buckle (210) matched with the limiting clamping groove (111) is arranged on the magnetic block (200), and the magnetic block (200) is arranged in the magnetic block placing groove (110) through a clamping structure formed by the limiting buckle (210) and the limiting clamping groove (111).
3. The Hall sensing magnetic ring of claim 2, wherein,
the limiting clamping groove (111) is arranged on the side wall of the magnetic block placing groove (110), and the plane of the side wall is perpendicular to the circumferential direction of the rotating shaft mounting hole (120);
the depth direction of the limiting clamping groove (111) is perpendicular to the radial direction of the rotating shaft mounting hole (120).
4. The Hall sensing magnetic ring of claim 2, wherein,
the limiting buckle (210) is a limiting protrusion, the limiting protrusion is provided with a guide surface (211), the guide surface (211) is intersected with the installation direction of the magnetic block (200), and the installation direction is the direction in which the magnetic block (200) is inserted into the magnetic block placing groove (110).
5. The Hall sensing magnetic ring as claimed in claim 2,
the magnetic block (200) is an arc-shaped magnetic block (200), the arc-shaped magnetic block (200) is arranged by taking the hole center of the rotating shaft mounting hole (120) as the center of a circle, and the N arc-shaped magnetic blocks (200) are arranged around the circumference of the rotating shaft mounting hole (120) to form a Hall sensing magnetic ring (320).
6. The Hall induction magnetic ring as claimed in claim 5,
the arc-shaped magnetic block (200) comprises two limiting buckles (210), and the two limiting buckles (210) are respectively arranged at two ends of the arc-shaped magnetic block (200) in the arc length direction.
7. The Hall sensing magnetic ring as claimed in claim 1,
the Hall induction magnetic ring is a bipolar magnetic ring, and the bipolar magnetic ring comprises 2 magnetic blocks (200);
or the Hall sensing magnetic ring is a three-pair magnetic ring, and the three-pair magnetic ring comprises 3 magnetic blocks (200).
8. A position sensor, comprising a hall sensor (310) and the hall sensing magnet ring (320) of any one of claims 1-7:
the Hall sensor (310) is arranged close to the radial edge of the magnetic ring, and the Hall sensor (310) is used for sensing the magnetic poles of the magnetic blocks (200) to generate pulse signals;
the Hall sensing magnetic ring (320) is sleeved on the rotating shaft of the motor.
9. A brushless electric machine comprising a current commutation circuit, a processor, and the hall induction magnet ring (320) of any one of claim 8:
the Hall sensing magnetic ring (320) is used for generating a pulse signal, and the pulse signal reflects the deflection angle of the motor rotor (400);
the processor is used for calculating the rotating speed and the deflection angle of the motor rotor (400) according to the pulse signal of the Hall induction magnetic ring (320);
the processor is further configured to control the current commutation circuit;
the current commutation circuit is used for changing the flowing direction of current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122791823.9U CN217135341U (en) | 2021-11-15 | 2021-11-15 | Hall induction magnet ring, position sensor and brushless motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122791823.9U CN217135341U (en) | 2021-11-15 | 2021-11-15 | Hall induction magnet ring, position sensor and brushless motor |
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| Publication Number | Publication Date |
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| CN217135341U true CN217135341U (en) | 2022-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122791823.9U Active CN217135341U (en) | 2021-11-15 | 2021-11-15 | Hall induction magnet ring, position sensor and brushless motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN217135341U (en) |
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- 2021-11-15 CN CN202122791823.9U patent/CN217135341U/en active Active
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