阅读说明：本技术 一种永磁无刷直流电机位置传感器 (Permanent magnet brushless direct current motor position sensor ) 是由 刘楷 林有余 周国扬 汪洋 陈伟 于 2020-11-30 设计创作，主要内容包括：本发明涉及直流电机技术领域,且公开了一种永磁无刷直流电机位置传感器,包括定子座,所述定子座内腔的中部开设有限位槽,所述限位槽的内部活动卡接有传感器本体,所述传感器本体的数量为三个,三个所述传感器本体的另一端均固定安装有固定杆。该永磁无刷直流电机位置传感器,通过在固定杆的内部则活动安装有活动杆和传感器本体,当需要对单个传感器本体进行拆卸时可通过向内侧按压限位块即可带动限位块底端的限位弹簧被压缩,当限位块位移至安装槽的内部,此时活动杆和固定杆之间的固定便被解除,向外即可拔出活动杆和传感器本体,进而拆卸单个传感器本体,从而实现了方便拆卸传感器本体的优点。(The invention relates to the technical field of direct current motors and discloses a permanent magnet brushless direct current motor position sensor which comprises a stator seat, wherein a limiting groove is formed in the middle of an inner cavity of the stator seat, three sensor bodies are movably clamped in the limiting groove, and fixing rods are fixedly arranged at the other ends of the three sensor bodies. This permanent magnetism brushless DC motor position sensor, then movable mounting has movable rod and sensor body through the inside at the dead lever, accessible when needs are dismantled single sensor body press the spacing spring that the stopper can drive the stopper bottom to the inboard compressed, when the inside of stopper displacement to mounting groove, fixed just being relieved between movable rod and the dead lever this moment, outwards can extract movable rod and sensor body, and then dismantle single sensor body, thereby realized conveniently dismantling the advantage of sensor body.)

1. The utility model provides a permanent magnetism brushless DC motor position sensor, includes stator seat (1), its characterized in that: spacing groove (7) have been seted up at the middle part of stator seat (1) inner chamber, the inside activity joint of spacing groove (7) has sensor body (9), the quantity of sensor body (9) is three, and is three the equal fixed mounting of the other end of sensor body (9) has dead lever (11), the middle part of stator seat (1) is equipped with pivot (2), the lateral surface fixed mounting of pivot (2) has fixed cover (8), angle fixed mounting such as the lateral surface of fixed cover (8) has movable rod (12), fixed slot (13) have been seted up to the bottom of dead lever (11), movable rod (12) are through fixed slot (13) and dead lever (11) activity joint.

2. A permanent magnet brushless dc motor position sensor according to claim 1, wherein: mounting groove (16) have all been seted up at the upper and lower both ends of movable rod (12), the equal fixed mounting in inside of mounting groove (16) has spacing spring (17), the equal fixed mounting in top of spacing spring (17) has movable post (18).

3. A permanent magnet brushless dc motor position sensor according to claim 1, wherein: the equal fixed mounting in top of activity post (18) has stopper (15), spacing hole (14) have all been seted up at the upper and lower both ends of dead lever (11), activity post (18) and spacing hole (14) activity joint.

4. A permanent magnet brushless dc motor position sensor according to claim 1, wherein: the limiting block (15) is located on the front face of the limiting hole (14), the cross section area of the limiting block (15) is the same as that of the limiting hole (14), and the limiting block (15) is perpendicular to the limiting hole (14).

5. A permanent magnet brushless dc motor position sensor according to claim 1, wherein: the stator seat is characterized in that the radiating holes (3) are formed in the front surface and the back surface of the stator seat (1) at equal angles, the other ends of the radiating holes (3) are fixedly communicated with the limiting grooves (7), the radiating holes (3) are fixedly communicated with a radiating cavity (4) in the front surface, the radiating grooves (5) are formed in the front surface of the radiating cavity (4), and the fan (6) located inside the radiating cavity (4) is fixedly mounted on the outer side surface of the rotating shaft (2).

6. A permanent magnet brushless dc motor position sensor according to claim 1, wherein: two equal fixedly connected with is located connecting spring (10) inside spacing groove (7) between sensor body (9), the quantity of connecting spring (10) is three, and is three be separated by one hundred twenty degrees between sensor body (9).

Technical Field

The invention relates to the technical field of direct current motors, in particular to a permanent magnet brushless direct current motor position sensor.

Background

A permanent magnet brushless motor is a permanent magnet motor that is phase-commutated or current-controlled by an electronic circuit. The permanent magnet brushless motor has two types of sine wave drive and square wave drive; the drive current is a rectangular wave, which is generally called a permanent magnet brushless dc motor, the drive current is a sine wave, which is generally called a permanent magnet ac servo motor, and the sensing type can be classified into a sensored motor and a positive sensor motor. The permanent magnet brushless motor can be regarded as a direct current motor which replaces mechanical commutation with an electronic commutation device, and mainly comprises a synchronous motor body, a power electronic inverter, a rotor position detector and a controller. The rotor of the synchronous motor is mainly composed of a permanent magnet, a magnetizer and the like. The permanent magnet DC brushless motor mainly comprises a permanent magnet motor body, a rotor position sensor and an electronic commutation circuit. The permanent magnet dc brushless motor has many similarities with the conventional dc motor, no matter the structure or control mode: the rotor with permanent magnet is used to replace the stator magnetic pole of the brush DC motor; replacing the armature with a stator having a multi-phase winding; the mechanical commutator and brushes are replaced by an electronic commutator consisting of a solid state inverter and a shaft position detector. The rotor position sensor is of three types, i.e., a photoelectric type, a magnetosensitive type, and an electromagnetic type.

At present, the position sensor is generally arranged in the direct current motor, the position sensor detects the position of the rotor in real time to judge the running state of the motor, the position sensor is generally arranged in the motor to detect the position of the rotor, the minimum number of the position sensors is generally three, but the structure of the position sensor is precise, a series of faults can be inevitably generated, the position sensor in the motor is generally designed into an integrated mode and arranged in the stator, when a certain position sensor breaks down, the disassembly of the position sensor becomes extremely difficult, and the actual use requirement can not be met.

In direct current motor's inside, position sensor often can follow the rotation of rotor and rotate, and it is in long-time rotatory back, owing to lack the connection nuclear device between the single sensor, leads to long-time rotation back easily, and the relative position of every position sensor takes place certain change, if reuse position sensor then can cause the judgement error of rotor position this moment, influences the motor and uses, and comparatively troublesome to position sensor's calibration, influences in-service use.

When the direct current motor is used, the rotor always rotates relative to the stator, so that a large amount of heat can be accumulated in the motor after the rotor rotates for a long time, and the position sensor is installed in the motor, so that the position sensor is bound to work in a high-temperature environment for a long time, the detection performance of the position sensor is reduced, and the service life of the position sensor is also influenced.

Disclosure of Invention

The invention provides a permanent magnet brushless direct current motor position sensor which has the advantages of conveniently disassembling a sensor body, reducing the calibration times of the sensor and avoiding the overheating phenomenon of the sensor body, and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides a permanent magnetism brushless DC motor position sensor, includes the stator seat, the spacing groove has been seted up at the middle part of stator seat inner chamber, the inside activity joint of spacing groove has the sensor body, the quantity of sensor body is three, and is three the equal fixed mounting of the other end of sensor body has the dead lever, the middle part of stator seat is equipped with the pivot, the lateral surface fixed mounting of pivot has fixed cover, angle fixed mounting such as the lateral surface of fixed cover has the movable rod, the fixed slot has been seted up to the bottom of dead lever, the movable rod passes through fixed slot and dead lever activity joint.

Preferably, the upper and lower both ends of movable rod have all been seted up the mounting groove, the equal fixed mounting in inside of mounting groove has spacing spring, the equal fixed mounting in top of spacing spring has the activity post.

Preferably, the top of activity post is all fixed mounting has the stopper, spacing hole has all been seted up at the upper and lower both ends of dead lever, activity post and spacing hole activity joint.

Preferably, the limiting block is located on the front face of the limiting hole, the cross section area of the limiting block is the same as that of the limiting hole, and the limiting block is perpendicular to the limiting hole.

Preferably, the radiating holes are formed in the front surface and the back surface of the stator seat at equal angles, the other ends of the radiating holes are fixedly communicated with the limiting groove, the front surfaces of the radiating holes are fixedly communicated with a radiating cavity, the front surface of the radiating cavity is provided with a radiating groove, and the outer side surface of the rotating shaft is fixedly provided with a fan located inside the radiating cavity.

Preferably, two equal fixedly connected with is located the inside coupling spring of spacing groove between the sensor body, coupling spring's quantity is three, and is three be separated by one hundred twenty degrees between the sensor body.

The invention has the following beneficial effects:

1. this brushless DC motor position sensor of permanent magnetism, it has fixed cover to connect through the fixed cover of surface at the pivot, and fixed surface at fixed cover installs the dead lever, and then movable mounting has movable rod and sensor body in the inside of dead lever, accessible when needs are dismantled single sensor body press the spacing spring that the stopper can drive the stopper bottom to the inboard side compressed, inside when stopper displacement to mounting groove, fixed just being relieved between movable rod and the dead lever this moment, outwards can extract movable rod and sensor body, and then dismantle single sensor body, thereby realized the advantage of conveniently dismantling sensor body.

2. This permanent magnetism brushless DC motor position sensor, the spacing groove has been seted up through the middle part at the stator seat inner chamber, and there is the sensor body at the inside movable mounting of spacing groove, sensor body quantity is three altogether, then be fixed with coupling spring between per two sensor bodies, when the pivot drives the sensor body and rotates, coupling spring receives certain centrifugal force and can take place deformation, and when the pivot is no longer rotated, coupling spring resumes deformation and makes the distance between every sensor body keep unchangeable, thereby realized reducing the advantage of sensor calibration number of times.

3. This permanent magnetism brushless DC motor position sensor, both ends etc. are seted up the louvre through controlling at the stator seat, and make louvre and the inside fixed intercommunication in heat dissipation chamber, and the back of louvre then with the spacing groove between fixed intercommunication, produced heat can conduct to the inside of spacing groove when the pivot rotates, the heat of spacing inslot portion just can get into the inside in heat dissipation chamber through the louvre this moment, thereby the pivot can drive the rotation of fan when rotating with the outside of the heat dissipation inslot of heat dissipation intracavity portion discharge, thereby realized the problem that can avoid the sensor body overheat phenomenon.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the heat sink structure of the present invention;

FIG. 3 is a schematic view of the internal structure of the stator base of the present invention;

FIG. 4 is an exploded view of the stator yoke and sensor body construction of the present invention;

FIG. 5 is an exploded view of the fixed and movable bar structures of the present invention;

fig. 6 is an enlarged schematic view of the structure at a in fig. 5.

In the figure: 1. a stator base; 2. a rotating shaft; 3. heat dissipation holes; 4. a heat dissipation cavity; 5. a heat sink; 6. a fan; 7. a limiting groove; 8. fixing a sleeve; 9. a sensor body; 10. a connecting spring; 11. fixing the rod; 12. a movable rod; 13. fixing grooves; 14. a limiting hole; 15. a limiting block; 16. mounting grooves; 17. a limiting spring; 18. a movable column.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, a permanent magnet brushless dc motor position sensor includes a stator seat 1, a limiting groove 7 is disposed in the middle of an inner cavity of the stator seat 1, three sensor bodies 9 are movably clamped inside the limiting groove 7, fixed rods 11 are fixedly mounted at the other ends of the three sensor bodies 9, a rotating shaft 2 is disposed in the middle of the stator seat 1, a fixed sleeve 8 is fixedly mounted on the outer side surface of the rotating shaft 2, movable rods 12 are fixedly mounted on the outer side surface of the fixed sleeve 8 at equal angles, a fixed groove 13 is disposed at the bottom end of each fixed rod 11, and each movable rod 12 is movably clamped with the corresponding fixed rod 11 through the corresponding fixed groove 13.

Wherein, mounting groove 16 has all been seted up at the upper and lower both ends of movable rod 12, and the equal fixed mounting in inside of mounting groove 16 has spacing spring 17, and the equal fixed mounting in top of spacing spring 17 has movable post 18, and the upper and lower displacement of movable post 18 can be driven in spacing spring 17's extension or compression, and then the realization is locked.

Wherein, the top of activity post 18 is all fixed mounting have a stopper 15, and spacing hole 14 has all been seted up at the upper and lower both ends of dead lever 11, and activity post 18 and spacing hole 14 activity joint can realize fixing between movable rod 12 and the dead lever 11 through spacing hole 14 and the joint of activity post 18.

Wherein, stopper 15 is located the front in spacing hole 14, stopper 15's cross sectional area is the same with spacing hole 14's cross sectional area, stopper 15 and spacing hole 14 mutually perpendicular, accessible when needs are dismantled single sensor body 9 press the spacing spring 17 that stopper 15 bottom can be driven to the inboard stopper 15 of pressing down to the accessible and compressed, inside to mounting groove 16 is displaced to stopper 15, the fixed just relieved between movable rod 12 and the dead lever 11 this moment, outwards can extract movable rod 12 and sensor body 9, and then dismantle single sensor body 9.

Wherein, louvre 3 has been seted up to the impartial angle in tow sides of stator seat 1, louvre 3's the other end and the fixed intercommunication of spacing groove 7, louvre 3 openly fixed intercommunication has heat dissipation chamber 4, heat dissipation groove 5 has been seted up in heat dissipation chamber 4's front, the lateral surface fixed mounting of pivot 2 has the fan 6 that is located heat dissipation chamber 4 inside, produced heat can conduct to the inside of spacing groove 7 when pivot 2 rotates, the inside heat of spacing groove 7 just can get into the inside in heat dissipation chamber 4 through louvre 3 this moment, thereby can drive the rotation of fan 6 when pivot 2 rotates and with the outside of heat dissipation chamber 4 inside heat dissipation groove 5 of dispelling the heat.

Wherein, equal fixedly connected with is located the inside coupling spring 10 of spacing groove 7 between two sensor bodies 9, and the quantity of coupling spring 10 is three, is separated by one hundred twenty degrees between three sensor body 9, and when pivot 2 drove sensor body 9 and rotates, coupling spring 10 received certain centrifugal force can take place deformation, and when pivot 2 no longer rotated, coupling spring 10 resumes deformation and makes the distance between every sensor body 9 keep unchangeable.

The working principle is that when the permanent magnet brushless DC motor position sensor is used, the position of a rotor can be detected through the three sensor bodies 9, when the rotating shaft 2 drives the sensor bodies 9 to rotate, the connecting spring 10 is deformed by a certain centrifugal force, when the rotating shaft 2 does not rotate any more, the connecting spring 10 recovers deformation to keep the distance between every two sensor bodies 9 unchanged, when the rotating shaft 2 rotates, the generated heat can be conducted to the inside of the limiting groove 7, at the moment, the heat in the limiting groove 7 can enter the inside of the heat dissipation cavity 4 through the heat dissipation holes 3, when the rotating shaft 2 rotates, the rotating fan 6 can be driven to rotate, so that the heat in the heat dissipation cavity 4 is discharged out of the heat dissipation groove 5, when a single sensor body 9 needs to be disassembled, the limiting spring 17 at the bottom end of the limiting block 15 can be driven to be compressed by pressing the limiting block 15 inwards, when the limiting block 15 is displaced to the inside of the mounting groove 16, the fixation between the movable rod 12 and the fixed rod 11 is released, the movable rod 12 and the sensor body 9 can be pulled out, and then the single sensor body 9 is detached.

It is 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 apparatus 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 apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.