阅读说明：本技术 一种电机转速补偿装置 (Motor rotation speed compensation device ) 是由 刘兴林 张巽 李建华 于 2019-11-23 设计创作，主要内容包括：本发明公开了一种电机转速补偿装置,涉及电机设备技术领域,包括装配外壳、底座、散热孔、传感器安装架和霍尔位置传感器,所述底座设置在所述装配外壳的左侧,所述散热孔开设在所述底座的外侧面,所述传感器安装架可拆卸式安装在所述底座内,所述霍尔位置传感器固定安装在所述传感器安装架的侧面,所述底座的内壁固定安装有扣紧机构。本发明,通过上述等结构之间的配合,具备了便于对传感器安装架进行拆装,安装过程较为方便,并且安装后稳固性较佳,实用性较高的效果。(The invention discloses a motor rotating speed compensation device, which relates to the technical field of motor equipment and comprises an assembly shell, a base, radiating holes, a sensor mounting frame and a Hall position sensor, wherein the base is arranged on the left side of the assembly shell, the radiating holes are formed in the outer side surface of the base, the sensor mounting frame is detachably mounted in the base, the Hall position sensor is fixedly mounted on the side surface of the sensor mounting frame, and a fastening mechanism is fixedly mounted on the inner wall of the base. According to the invention, through the matching of the structures, the sensor mounting frame is convenient to disassemble and assemble, the mounting process is more convenient, the mounting stability is better and the practicability is higher.)

1. The utility model provides a motor speed compensation arrangement, is including assembly shell (1), base (2), louvre (3), sensor mounting bracket (4) and hall position sensor (5), base (2) set up the left side of assembly shell (1), louvre (3) are seted up the lateral surface of base (2), sensor mounting bracket (4) are detachable to be installed in base (2), hall position sensor (5) fixed mounting be in the side of sensor mounting bracket (4), its characterized in that: a fastening mechanism (6) is fixedly arranged on the inner wall of the base (2);

the fastening mechanism (6) comprises a cover body (7), a first pressing block (8), a second pressing block (9) and a slot (10), the cover body (7) is detachably installed on the outer surface of the base (2), the first pressing block (8) slides along the inner wall of the base (2) in an up-and-down limiting mode, a limiting plate (11) is fixedly connected to the side face of the first pressing block (8), a compression spring (12) is fixedly connected to one side, close to the sensor mounting frame (4), of the limiting plate (11), one end, far away from the limiting plate (11), of the compression spring (12) is fixedly connected with the inner wall of the base (2), the first pressing block (8) is close to the right side of the lower end of the first pressing block and abutted against the left side of the sensor mounting frame (4), the second pressing block (9) is fixedly connected to the left side of the cover body (7), the slot (10) is arranged on the right side of the base (2), and the second pressing block (9) is inserted into the slot of the slot (10) and is abutted against the first pressing block (8).

2. A motor speed compensation device according to claim 1, wherein: the number of the Hall position sensors (5) is three, and the three Hall position sensors (5) are distributed in a ring-shaped array.

3. A motor speed compensation device according to claim 1, wherein: the cover body (7) is detachably connected with the base (2) through bolts (13), and the number of the stretching pieces (13) is not less than 2.

4. A motor speed compensation device according to claim 1, wherein: an opening (14) corresponding to the position of the heat dissipation hole (3) is formed in the outer side surface of the cover body (7), and a dust screen (15) is fixedly mounted on the cover body (7) through the opening (14).

5. A brushless dc motor speed and rotor position compensation apparatus according to claim 1, wherein: the number of the first pressing blocks (8) is not less than 2, and the first pressing blocks (8) are distributed in a ring-shaped array.

6. The apparatus of claim 5, wherein the apparatus further comprises: the number of the second pressing blocks (9) is the same as that of the first pressing blocks (8), and the second pressing blocks (9) are also distributed in an annular array.

Technical Field

The invention relates to the technical field of motor equipment, in particular to a motor rotating speed compensation device.

Background

The brushless direct current motor needs to acquire the motor rotating speed and the rotor position in real time, and meanwhile, the logic synthesis of a rotating speed closed-loop control box is carried out to generate a switch tube control logic. Deviation of the rotating speed data and the rotor position data can cause that the motor can not work stably, the rotating speed pulsation of the motor is increased, the consumed current is increased, even parameters are saturated, and the rotating speed of the motor is out of control; the incorrect position data of the motor rotor can cause the conduction logic error of the switch tube, if the data is incorrect, the function of the motor is lost, and if the data is incorrect, the power tube is damaged by overcurrent.

Brushless DC motor installs hall position sensor in the motor body generally, and in sensor signal fed back motor controller through the cable, through gathering the back, control software handled rotational speed and rotor position data. Motor speed and rotor position data are key data in motor control software. The brushless motor and the controller have severe service environment, the sensor faults and the sensor cable faults account for higher total faults of the product through statistics, the rotating speed and rotor position data acquisition process of the traditional brushless direct current motor is shown in figure 3, when one-phase Hall signals are abnormal, rotating speed calculation errors occur, and a speed ring cannot work normally. Meanwhile, the missing of the hall signals causes the large pulsation of the rotating speed of the motor, the increased pulsation of the bus current and even the overcurrent damage of the power tube, so that the flow of acquiring and compensating the rotating speed and the rotor position data of the brushless direct current motor adopted by the invention is shown in fig. 4, the rotating speed of the motor is simultaneously calculated according to the three hall signals, and the three rotating speed data are circularly compared. And when the difference between every two of the three data is smaller than a set abnormal threshold value, the three data are all effective, an average value is taken as effective data and is output to a speed ring, and meanwhile, three Hall signal logics are adopted to perform logic synthesis and output by PWM. And when the difference value of two data in the three rotating speed data is smaller than the set abnormal threshold value, and the difference value of the two data and the last effective data is smaller than the set abnormal threshold value, judging that the one-phase Hall signal is abnormal. And taking the average value of the two effective rotating speed data, outputting the average value to a speed ring, reconstructing abnormal Hall signal logic by using the obtained rotating speed data, and finally performing logic synthesis and output with PWM. And when only one data difference value in the three rotating speed data is smaller than the set abnormal threshold value and the difference value between the three rotating speed data and the last effective data is smaller than the set abnormal threshold value, judging that the two-phase Hall signal is abnormal. And taking effective rotating speed data and outputting the effective rotating speed data to a speed ring, and simultaneously reconstructing abnormal two-phase Hall signal logic by using the obtained rotating speed data, and finally performing logic synthesis and output with PWM. However, in general, three hall position sensors are generally placed inside a motor, even most of the three hall position sensors are directly placed on a stator core or inside a gap between the stator core and a coil, and because a stator coil generates a large amount of heat during working, the heat is directly conducted to the hall position sensors, the temperature can continuously rise during the working of the motor, and the whole or local temperature of the stator core can be abnormally increased due to long-time heavy load working or short-time severe overload, so that the sensor is damaged due to exceeding the enduring temperature of the hall position sensors, for example, the mounting structure of the hall position sensors of the motor disclosed in chinese patent CN201822117922.7, granted notice date 20191018, the utility model enables the hall position sensors to be independently arranged on a base, and the side wall of the base is provided with a plurality of heat dissipation holes, thereby reducing the influence of the heat generated by the relative rotation of the stator and the rotor on the hall, however, the utility model discloses an installation and the process of changing to hall position sensor get off the realization with the sensor mounting bracket by the dismouting on the base, and it realizes the installation and the dismantlement of sensor mounting bracket through a plurality of recesses and a plurality of lugs, and its steadiness is not good.

Disclosure of Invention

The invention aims to provide a motor rotating speed compensation device which has the effects of convenience in disassembly and assembly of a sensor mounting frame, convenience in installation process, better stability after installation and higher practicability, and solves the problems that in the prior art, the sensor mounting frame is disassembled and assembled from a base, the sensor mounting frame is assembled and disassembled through a plurality of grooves and a plurality of lugs, and the stability is poor.

In order to achieve the purpose, the invention provides the following technical scheme: including assembly shell, base, louvre, sensor mounting bracket and hall position sensor, the base sets up the left side of assembly shell, the louvre is seted up the lateral surface of base, the detachable installation of sensor mounting bracket is in the base, hall position sensor fixed mounting be in the side of sensor mounting bracket, the inner wall fixed mounting of base has straining mechanism.

The straining mechanism includes the cover body, first suppression piece, second suppression piece and slot, the cover body is detachable installs the surface of base, first suppression piece is followed spacing slip about the inner wall of base, the side fixedly connected with limiting plate of first suppression piece, the limiting plate is close to one side fixedly connected with compression spring of sensor mounting bracket, compression spring keeps away from the one end of limiting plate with the inner wall fixed connection of base, first suppression piece be close to its lower extreme the right side with the left side butt of sensor mounting bracket, second suppression piece fixed connection be in the left side of the cover body, the slot is seted up the right side of base, the second suppression piece insert extremely the inslot of slot and with first suppression piece looks butt.

Preferably, the number of the hall position sensors is three, and the three hall position sensors are distributed in an annular array.

Preferably, the cover body is detachably connected with the base through bolts, and the number of the stretching pieces is not less than one.

Preferably, the outer side surface of the cover body is provided with an opening corresponding to the position of the heat dissipation hole, and the cover body is fixedly provided with a dust screen through the opening.

Preferably, the number of the first pressing blocks is not less than one, and the first pressing blocks are distributed in a ring-shaped array.

Preferably, the number of the second pressing blocks is the same as that of the first pressing blocks, and the second pressing blocks are also distributed in an annular array.

Compared with the prior art, the invention has the following beneficial effects:

firstly, the invention combines three Hall position sensors with the graph shown in FIG. 4, 1, changes the mode of adopting one-phase Hall sensor signals to calculate the rotating speed in the traditional algorithm into the mode of adopting three-phase Hall sensor signals to calculate circularly; 2. and integrating the rotation speed data to realize real-time isolation observation of the position data, and when abnormality occurs, logically synthesizing the observed position data to isolate the sensor data.

The sensor mounting frame is convenient to disassemble and assemble through the cover body, the first pressing block, the second pressing block, the inserting groove, the limiting plate, the compression spring and the bolt, the mounting process is convenient, the stability is better after the sensor mounting frame is mounted, and the effect of higher practicability is achieved.

Drawings

FIG. 1 is a front cross-sectional view of the structure of the present invention;

FIG. 2 is an enlarged view of the structure of FIG. 1 at A in accordance with the present invention;

FIG. 3 is a flow chart illustrating the conventional process of acquiring the rotational speed and position data of the brushless DC motor according to the present invention;

FIG. 4 is a flow chart of motor speed and rotor position data acquisition and compensation employed in the present invention.

In the figure: 1-assembling a shell, 2-a base, 3-radiating holes, 4-a sensor mounting rack, 5-a Hall position sensor, 6-a fastening mechanism, 7-a cover body, 8-a first pressing block, 9-a second pressing block, 10-a slot, 11-a limiting plate, 12-a compression spring, 13-a bolt, 14-an opening and 15-a dustproof net.

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 to 4, the present invention provides a technical solution: the assembling structure comprises an assembling shell 1, a base 2, radiating holes 3, a sensor mounting frame 4 and Hall position sensors 5, wherein the assembling shell 1, the base 2, the radiating holes 3, the sensor mounting frame 4 and the Hall position sensors 5 related by the assembling structure are all parts disclosed in the specifications of documents compared in the background art, the specifications of the documents compared in the background art are detailed, the base 2 is arranged on the left side of the assembling shell 1, the base 2 is detachably connected with the assembling shell 1 through screws or buckles, the radiating holes 3 are formed in the outer side surface of the base 2, the sensor mounting frame 4 is detachably arranged in the base 2, the Hall position sensors 5 are fixedly arranged on the side surface of the sensor mounting frame 4, and fastening mechanisms 6 are fixedly arranged on the inner wall of the base 2.

The fastening mechanism 6 comprises a cover body 7, first pressing blocks 8, second pressing blocks 9 and slots 10, the number of the first pressing blocks 8 is not less than 2, the first pressing blocks 8 are distributed in an annular array, the number of the second pressing blocks 9 is consistent with that of the first pressing blocks 8, the second pressing blocks 9 are also distributed in an annular array, the cover body 7 is detachably mounted on the outer surface of the base 2, the first pressing blocks 8 slide up and down along the inner wall of the base 2 in a limiting manner, limiting plates 11 are fixedly connected to the side surfaces of the first pressing blocks 8, compression springs 12 are fixedly connected to one sides of the limiting plates 11 close to the sensor mounting frame 4, one ends of the compression springs 12 far away from the limiting plates 11 are fixedly connected with the inner wall of the base 2, the right side of the first pressing block 8 close to the lower end of the first pressing block 8 is abutted to the left side of the sensor mounting frame 4, and, the slot 10 is opened on the right side of the base 2, the second pressing block 9 is inserted into the slot of the slot 10 and abutted against the first pressing block 8, when the sensor mounting frame 4 is disassembled, the bolt 13 is turned, the bolt 13 is taken down, then the cover body 7 is pulled towards the direction far away from the assembly shell 1, in the process, as shown in fig. 2, the cover body 7 moves towards the direction far away from the assembly shell 1, the second pressing block 9 gradually moves out of the slot 10, then the elastic restoring force of the compression spring 12 is utilized, the first pressing block 8 in fig. 2 moves upwards, after the second pressing block 9 completely moves out of the slot 10, the first pressing block 8 also simultaneously breaks away from the left side of the sensor mounting frame 4, and then the sensor mounting frame 4 is convenient to disassemble.

Preferably, the number of the hall position sensors 5 is three, and the three hall position sensors 5 are distributed in a ring array, as shown in fig. 4, the rotating speed of the motor is calculated simultaneously according to the three hall signals, and the three rotating speed data are compared in a circulating manner. And when the difference between every two of the three data is smaller than a set abnormal threshold value, the three data are all effective, an average value is taken as effective data and is output to a speed ring, and meanwhile, three Hall signal logics are adopted to perform logic synthesis and output by PWM. And when the difference value of two data in the three rotating speed data is smaller than the set abnormal threshold value, and the difference value of the two data and the last effective data is smaller than the set abnormal threshold value, judging that the one-phase Hall signal is abnormal. And taking the average value of the two effective rotating speed data, outputting the average value to a speed ring, reconstructing abnormal Hall signal logic by using the obtained rotating speed data, and finally performing logic synthesis and output with PWM. And when only one data difference value in the three rotating speed data is smaller than the set abnormal threshold value and the difference value between the three rotating speed data and the last effective data is smaller than the set abnormal threshold value, judging that the two-phase Hall signal is abnormal. And taking effective rotating speed data and outputting the effective rotating speed data to a speed ring, and simultaneously reconstructing abnormal two-phase Hall signal logic by using the obtained rotating speed data, and finally performing logic synthesis and output with PWM.

Preferably, cover 7 passes through bolt 13 and is connected with base 2 is detachable, and 2 are no less than to tensile 13 quantity, and through the bolt 13 that sets up, be convenient for carry out the dismouting between cover 7 and the base 2.

Preferably, the lateral surface of the cover body 7 is provided with an opening 14 corresponding to the position of the heat dissipation hole 3, the cover body 7 is fixedly provided with a dust screen 15 through the opening 14, the dust screen 15 is arranged, the dust-proof effect is achieved on the heat dissipation hole 3, and the dust screen 15 can be conveniently cleaned when the cover body 7 is taken down.

The working principle is as follows: when the brushless direct current motor rotating speed and rotor position compensation device is used for dismounting the sensor mounting frame 4, the bolt 13 is taken down by twisting the bolt 13, then the cover body 7 is pulled towards the direction far away from the assembly shell 1, in the process, as shown in figure 2, the cover body 7 moves towards the direction far away from the assembly shell 1, so that the second pressing block 9 gradually moves out of the slot 10, and then the first pressing block 8 in figure 2 moves upwards by utilizing the elastic restoring force of the compression spring 12, so that after the second pressing block 9 completely moves out of the slot 10, the first pressing block 8 is also separated from the left side of the sensor mounting frame 4 at the same time, and the sensor mounting frame 4 is further convenient to dismount; when sensor mounting bracket 4 needs to be fixed, through reinserting second pressing block 9 into slot 10, utilize the process that the inclined plane end of second pressing block 9 supports and presses the inclined plane end of first pressing block 8 in this process, make first pressing block 8 be close to the left side of its right side butt sensor mounting bracket 4 again of bottom, and then realized the fixed to sensor mounting bracket 4 position, turn round bolt 13 back to the state shown in fig. 1 at last, can realize the rigidity of the cover body 7, and opening 14 aligns louvre 3 this moment, thereby setting through dust screen 15, locate to louvre 3 and played dirt-proof effect, and when taking off the cover body 7, can conveniently clear up dust screen 15.

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.