Hall element position adjusting device

Abstract

The embodiment of the present specification provides a Hall element position adjusting device, comprising: a brushless direct current motor assembly, a Hall position adjusting ring assembly and a base, the Hall position adjusting ring assembly is connected with the base, the brushless direct current motor assembly is connected with the base through the Hall position adjusting ring assembly, and the relative angle of the Hall position adjusting ring assembly and the brushless direct current motor assembly can be adjusted; the Hall element is arranged on the Hall position adjusting ring assembly and is electrically connected with the brushless direct current motor assembly. Through the Hall position adjusting ring assembly, the relative angle position of the Hall element group and the brushless direct current motor assembly can be adjusted, and the relative angle position between the plurality of Hall elements can be adjusted, the problem that the welding angle precision of the multiphase Hall element cannot be guaranteed is solved, the Hall position sensor can always be arranged at the best position, the motor can always work at the best performance is ensured, and the control precision, response rate and energy conversion efficiency of the whole system are improved.

Description

Technical Field

[0001] This specification relates to the field of brushless DC motor technology for aircraft, specifically to a Hall element position adjustment device. Background Technology

[0002] A permanent magnet brushless DC motor uses permanent magnets to create a magnetic field and an electronic commutator to replace the commutator, converting direct current energy into mechanical rotation. A dedicated driver is required for normal operation of a permanent magnet brushless DC motor. The driver uses Hall effect position sensors installed inside the motor to obtain the rotor position and then drives the motor normally with square wave or sinusoidal current. Aviation brushless DC motors typically use three-phase Hall effect sensors evenly distributed at 120° intervals, with each phase separated by 60°. The angular error of the Hall effect sensor position directly affects the commutation accuracy of the brushless motor, and thus its performance.

[0003] Current technologies typically involve soldering three Hall effect sensors onto a printed circuit board (PCB), and then adjusting the position of the Hall sensors by rotating the PCB. The limitation of this method is that it can only adjust the position of the three Hall sensors as a whole, and cannot adjust the relative angular positions between them. The angular position deviation caused by the soldering of the Hall sensors cannot be resolved, preventing the brushless motor from achieving optimal performance. Therefore, an adjustment device is needed to individually adjust the relative angular positions between the three Hall sensors, reducing errors, improving commutation accuracy, and enhancing the motor's performance and energy conversion efficiency. Summary of the Invention

[0004] In view of this, the embodiments of this specification provide a Hall element position adjustment device to achieve the purpose of adjusting the relative angular position of the Hall element group and the brushless DC motor assembly, as well as adjusting the relative angular position between the Hall elements individually, reducing errors, improving commutation accuracy, and enhancing the working performance and energy conversion efficiency of the motor.

[0005] The embodiments in this specification provide the following technical solutions:

[0006] A Hall element position adjustment device, comprising:

[0007] The components include a brushless DC motor assembly, a Hall position adjustment ring assembly, and a base. The Hall position adjustment ring assembly is connected to the base, and the brushless DC motor assembly passes through the Hall position adjustment ring assembly and is connected to the base. The relative angle between the Hall position adjustment ring assembly and the brushless DC motor assembly is adjustable.

[0008] The Hall element is mounted on the Hall position adjustment ring assembly and electrically connected to the brushless DC motor assembly.

[0009] Furthermore, the Hall position adjustment ring assembly includes:

[0010] Multiple Hall position adjustment rings, each Hall position adjustment ring includes an adjustment ring body, a Hall element fixing seat and a mounting stop. Two adjacent Hall position adjustment rings are sleeved together by the mounting stop and the adjustment ring body and can rotate relative to each other. The Hall element fixing seat is fixed on the adjustment ring body.

[0011] The Hall element is fixed to the Hall position adjustment ring by the Hall element mounting bracket.

[0012] Furthermore, the number of Hall position adjustment rings is the same as the number of phases of the DC motor.

[0013] Furthermore, the Hall position adjustment ring assembly also includes a threaded through hole and a waist-shaped hole. The waist-shaped hole is set on the adjustment ring body of the outermost Hall position adjustment ring. The Hall position adjustment ring assembly is fixed to the base at an adjustable angle by screws and waist-shaped holes. The threaded through hole is set on the adjustment ring body, and two adjacent Hall position adjustment rings are fixed to each other by the threaded through hole.

[0014] Furthermore, the Hall element position adjustment device also includes an end cover, which and the base together form a chamber, in which a brushless DC motor assembly and a Hall position adjustment ring assembly are placed.

[0015] Furthermore, the end cap includes:

[0016] End cap claws and through holes: Multiple end cap claws are set at the bottom of the end cap, and through holes are set at the bottom of the end cap claws. The end cap is fixed by the through holes on the end cap claws and the base.

[0017] Threaded through holes are provided on the end cover claws, and the brushless DC motor assembly is fixed on the end cover claws through the threaded through holes;

[0018] The second bearing chamber is a hollow structure located on the top surface of the end cover.

[0019] Furthermore, the base includes:

[0020] The support base consists of a first bearing chamber, base claws, and a support ring. The first bearing chamber is located at the top center of the support base, and the support ring is fixed to the top surface of the support base by multiple base claws located on the outer diameter of the support base.

[0021] Furthermore, the brushless DC motor assembly includes:

[0022] The stator assembly is fixed to the side wall of the end cover via threaded through holes.

[0023] Furthermore, the brushless DC motor assembly also includes:

[0024] The first bearing is fixed to the bottom surface of the end cover via the second bearing chamber.

[0025] Furthermore, the brushless DC motor assembly also includes:

[0026] The second bearing is fixed to the top surface of the base through the first bearing chamber;

[0027] Rotor assembly, the rotor assembly is mounted on the second bearing.

[0028] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0029] By individually fixing each Hall element to an adjustment ring, this invention solves the problem that previous methods of soldering multiple Hall elements onto a printed circuit board only allowed for overall rotational adjustment, failing to address the relative angle error of multi-phase Hall elements. The Hall position adjustment ring assembly can adjust both the relative angle position of the Hall element group and the brushless DC motor assembly, as well as the relative angle position between multiple Hall elements. This solves the problem of inconsistent welding angle accuracy for multi-phase Hall elements, ensuring that the Hall position sensor is always positioned optimally. This guarantees that the brushless DC motor always operates at its best performance, while also improving the overall system's control accuracy, response rate, and energy conversion efficiency. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a cross-sectional view of the Hall element position adjustment device according to the first embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of the Hall position adjustment ring assembly according to the first embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the base according to the first embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the end cap according to the first embodiment of the present invention.

[0035] Explanation of reference numerals in the attached drawings: 1. Base; 101. Support base; 102. First threaded hole; 103. First bearing chamber; 104. Base claw; 105. Second threaded hole; 106. Support ring; 2. First screw; 3. End cap; 301. End cap claw; 302. Second bearing chamber; 303. Threaded through hole; 304. Through hole; 4. First set screw; 5. Stator assembly; 6. Rotor assembly; 7. First bearing; 8. Second set screw; 9. Third set screw; 10. Second screw; 11. Second bearing; 12. Hall effect sensor 1201. First adjustment ring for Hall element position; 1202. First adjustment ring body; 1203. First mounting stop; 13. Second adjustment ring for Hall element position; 1301. Second mounting seat for Hall element; 1302. Second adjustment ring body; 1303. First threaded through hole; 1304. Second mounting stop; 14. Third adjustment ring for Hall element position; 1401. Third mounting seat for Hall element; 1402. Third adjustment ring body; 1403. Waist-shaped hole; 1404. Second threaded through hole; 15. Hall element. Detailed Implementation

[0036] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0037] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0039] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0040] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0041] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0042] refer to Figure 1 The sectional view of the Hall element position adjustment device mainly includes: a fixed component, a brushless DC motor component, and a Hall position adjustment ring component.

[0043] The brushless DC motor assembly includes a stator assembly 5, a rotor assembly 6, a first bearing 7, and a second bearing 11. The stator assembly 5 includes a stator core and windings. The Hall position adjustment ring assembly includes a first Hall position adjustment ring 12, a second Hall position adjustment ring 13, a third Hall position adjustment ring 14, and a Hall element 15. The fixing assembly includes a first screw 2, a first set screw 4, a second set screw 8, a third set screw 9, and a second screw 10 used to fix all the components together.

[0044] End cap 3 is fixed to the outer wall of base 1. Base 1 and end cap 3 together form an internal space, in which a brushless DC motor assembly and a Hall position adjustment ring assembly are placed. The stator assembly 5 of the brushless DC motor assembly is fixed to the side of end cap 3. First bearing 7 is fixed to end cap 3, and second bearing 11 is fixed to base 1. The brushless DC motor assembly is fixed to base 1 through the center of Hall position adjustment ring assembly.

[0045] like Figure 2As shown, the Hall position adjustment ring assembly of the first embodiment includes three Hall position adjustment rings. The first Hall position adjustment ring 12 comprises a first adjustment ring body 1202 and a first Hall element fixing seat 1201. A first mounting stop 1203 is machined on the first adjustment ring body 1202. The second Hall position adjustment ring 13 comprises a second adjustment ring body 1302 and a second Hall element fixing seat 1301. Three first threaded through holes 1303 and a second mounting stop 1304 are machined on the second adjustment ring body 1302, which is evenly distributed along the circumference. The third Hall position adjustment ring comprises a third adjustment ring body 1402 and a third Hall element fixing seat 1401. Three second threaded through holes 1404 and three large-angle oblong holes 1403 are evenly distributed along the circumference of the third adjustment ring body 1402.

[0046] The Hall position first adjusting ring 12 is installed in the second adjusting ring body 1302 of the Hall position second adjusting ring 13 via the first mounting stop 1203. The first threaded through hole 1303 and the second set screw 8 adjust and tighten the Hall position first adjusting ring 12 and the Hall position second adjusting ring 13. The Hall position second adjusting ring 13 is installed in the third adjusting ring body 1402 of the Hall position third adjusting ring 14 via the second mounting stop 1304. The first threaded through hole 1303 and the third set screw 9 adjust and tighten the Hall position second adjusting ring 13 and the Hall position third adjusting ring 14, assembling the three adjusting rings into a single unit. The three adjusting rings are fixed to the base 1 via the oblong hole 1403 on the third adjusting ring body 1402 and the first screw 2. By adjusting the position of the first screw 2 in the oblong hole 1403, the angle of the three adjusting rings as a whole, i.e., the Hall position adjusting ring assembly, relative to the brushless DC motor assembly can be adjusted.

[0047] A Hall element 15 can be fixed on the first Hall element mounting base 1201, the second Hall element mounting base 1301, and the third Hall element mounting base 1401.

[0048] Through the above design, the Hall element group consisting of three Hall elements 15 can be adjusted relative to the brushless DC motor assembly, and the relative angle of each Hall element 15 can also be adjusted.

[0049] like Figure 3As shown, the base 1 mainly consists of a support base 101 and a support ring 106. The support base 101 is provided with a first bearing chamber 103 and a first threaded hole 102. The base 1 serves as the support structure for the entire Hall element position adjustment device and is located at the bottom of all parts. The support ring 106 is used to install the stator assembly 5 of the motor that matches the Hall element. The support base 101 and the support ring 106 are connected and fixed by three evenly distributed base claws 104, and each of the three base claws 104 has a second threaded hole 105 for fixing the fixed end cover 3 to the base 1.

[0050] like Figure 4 As shown, the end cover 3 includes end cover claws 301 and a second bearing chamber 302. The three end cover claws 301 are evenly distributed along the circumference, and each end cover claw 301 has a threaded through hole 303 and a through hole 304. The end cover 3 is fixed to the base 1 via the through holes 304 and bolts. The stator assembly 5 is fixed to the end cover 3 via the threaded through holes 303 and bolts.

[0051] The base 1's base claw 104 and the end cap 3's end cap claw 301 engage to form a chamber, within which a brushless DC motor assembly and a Hall position adjustment ring assembly are placed. The base 1 and end cap 3, the Hall position adjustment ring assembly and base 1, the brushless DC motor assembly and base 1, and the brushless DC motor assembly and end cap 3 are then fixedly connected using various screws and threaded holes.

[0052] In some implementations, when the aircraft brushless DC motor is three-phase, three Hall elements 15 are required and installed in the following manner:

[0053] The first step is to install the second bearing 11 inside the first bearing chamber 103 of the base 1 for subsequent installation and fixing of the rotor of the motor that is matched with the Hall element.

[0054] The second step is to install the first Hall position adjustment ring 12 into the second adjustment ring body 1302 of the second Hall position adjustment ring 13 through the first mounting stop 1203, and screw the second set screw 8 into the first threaded through hole 1303 to secure the first Hall position adjustment ring 12, thus assembling the first Hall position adjustment ring 12 and the second Hall position adjustment ring 13 into one unit.

[0055] The third step is to install the second adjustment ring 13 of the Hall position, which is assembled with the first adjustment ring 12 of the Hall position, into the third adjustment ring body 1402 of the third adjustment ring 14 of the Hall position through its second mounting stop 1304, and to tighten it by screwing in the third set screw 9 into the second threaded through hole 1404, thereby assembling the first adjustment ring 12 of the Hall position, the second adjustment ring 13 of the Hall position, and the third adjustment ring 14 of the Hall position into one unit.

[0056] Fourth step: Pass the second screw 10 through the waist-shaped hole 1403 on the third adjustment ring body 1402 of the Hall position third adjustment ring 14, and install the Hall position first adjustment ring 12, Hall position second adjustment ring 13 and Hall position third adjustment ring 14, which are installed as a whole, on the base 1.

[0057] Step 5: Fix the three-phase Hall element 15 onto the first fixing seat 1201 of the Hall element on the first adjusting ring 12, the second adjusting ring 13, and the third adjusting ring 14 of the Hall position, respectively. The fixing method can be adhesive, wire binding, or putty pressing.

[0058] Step 6: Install the stator assembly 5 on the support ring 106 of the base 1, and install the rotor assembly 6 on the second bearing 11 in the first bearing chamber 103 of the base 1. Then install the end cover 3 on the base 1, ensuring that the shaft of the rotor assembly 6 is installed in the first bearing 7, and align the three end cover claws 301 of the end cover 3 with the three base claws 104 of the base 1, and screw in the first screw 2 to fix it.

[0059] Step 7: Screw the first set screw 4 into the threaded through hole 303 of the end cover 3 to fix the stator assembly 5.

[0060] Step 8: Connect the stator assembly 5 and the three-phase Hall element 15 to the brushless DC motor driver to drive the rotor assembly 6 to rotate, and simultaneously observe the output signal waveform of the three-phase Hall element 15 with an oscilloscope. Loosen the second set screw 8, the third set screw 9, and the second screw 10, and adjust the Hall position angle by rotating the Hall position first adjustment ring 12, the Hall position second adjustment ring 13, and the Hall position third adjustment ring 14 respectively, so that the three-phase Hall output signal waveforms are 60° electrical angles out of phase.

[0061] Step 9: After adjusting the position of the three-phase Hall element 15 to the optimal position (i.e., the three-phase Hall waveforms are 60° out of phase), tighten the second set screw 8, the third set screw 9, and the second screw 10 to fix the three-phase Hall element 15 to the current position.

[0062] In the second embodiment, when the brushless DC motor for aviation is four-phase, four Hall elements 15 are required. To fix the four Hall elements 15, a Hall position adjustment ring assembly containing four Hall position adjustment rings is required. The outer diameters of the four Hall position adjustment rings can be interlocked and can rotate relative to each other to adjust the Hall position angles so that the four-phase Hall output signal waveforms are 45° electrical angles out of phase.

[0063] In other embodiments, if the brushless DC motor for aircraft is five-phase or higher, the position angle of each Hall element 15 can be adjusted by using the corresponding number of Hall elements 15 and the corresponding number of Hall position adjustment rings, so that the Hall output signal waveform differs from the required electrical angle.

[0064] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the method embodiments described later are relatively simple in description because they correspond to the system; relevant parts can be referred to the descriptions in the system embodiments.

[0065] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A Hall element position adjustment device, characterized in that, include: The assembly includes a brushless DC motor assembly, a Hall position adjustment ring assembly, and a base (1). The Hall position adjustment ring assembly is connected to the base (1). The brushless DC motor assembly passes through the Hall position adjustment ring assembly and is connected to the base (1). The relative angle between the Hall position adjustment ring assembly and the brushless DC motor assembly is adjustable. Hall element (15), Hall element (15) is disposed on the Hall position adjustment ring assembly and electrically connected to the brushless DC motor assembly; The Hall position adjustment ring assembly includes: Multiple Hall position adjustment rings, each Hall position adjustment ring including an adjustment ring body, a Hall element fixing seat and a mounting stop, two adjacent Hall position adjustment rings are sleeved together by the mounting stop and the adjustment ring body and can rotate relative to each other, the Hall element fixing seat is fixed on the adjustment ring body; The Hall element (15) is fixed on the Hall position adjustment ring by the Hall element mounting base.

2. The Hall element position adjustment device according to claim 1, characterized in that, The number of Hall position adjustment rings is the same as the number of phases of the DC motor.

3. The Hall element position adjustment device according to claim 1, characterized in that, The Hall position adjustment ring assembly also includes a threaded through hole and a waist-shaped hole (1403). The waist-shaped hole (1403) is provided on the adjustment ring body of the outermost Hall position adjustment ring. The Hall position adjustment ring assembly is fixed to the base (1) with adjustable angle by screws and waist-shaped holes (1403). The threaded through hole is provided on the adjustment ring body. Two adjacent Hall position adjustment rings are fixed to each other through the threaded through hole.

4. The Hall element position adjustment device according to claim 1, characterized in that, The Hall element position adjustment device also includes an end cover (3), which and the base (1) together form a cavity in which the brushless DC motor assembly and the Hall position adjustment ring assembly are placed.

5. The Hall element position adjustment device according to claim 4, characterized in that, End cap (3) includes: End cap claws (301) and through holes (304), multiple end cap claws (301) are provided at the bottom of the end cap (3), and through holes (304) are provided at the bottom of the end cap claws (301). The end cap (3) is fixed by the through holes (304) on the end cap claws (301) and the base (1); A threaded through hole (303) is provided on the end cover claw (301), and the brushless DC motor assembly is fixed on the end cover claw (301) through the threaded through hole (303); The second bearing chamber (302) is a hollow structure set on the top surface of the end cover (3).

6. The Hall element position adjustment device according to claim 1, characterized in that, The base (1) includes: The support base (101), the first bearing chamber (103), the base claw (104) and the support ring (106) are provided. The first bearing chamber (103) is provided on the top center surface of the support base (101). The support ring (106) is fixed to the top of the support base (101) by multiple base claws (104) provided on the outer diameter of the support base (101).

7. The Hall element position adjustment device according to claim 5, characterized in that, The brushless DC motor assembly includes: The stator assembly (5) is fixed to the side wall of the end cap (3) through a threaded through hole (303).

8. The Hall element position adjustment device according to claim 5, characterized in that, The brushless DC motor assembly also includes: The first bearing (7) is fixed to the bottom surface of the end cover (3) through the second bearing chamber (302).

9. The Hall element position adjustment device according to claim 6, characterized in that, The brushless DC motor assembly also includes: The second bearing (11) is fixed to the top surface of the base (1) through the first bearing chamber (103); Rotor assembly (6) is mounted on the second bearing (11).

Images