A method and system for correcting the installation position of a Hall sensor of a switched reluctance motor

Abstract

The present invention relates to the technical field of motors, and discloses a method and system for correcting the installation position of a Hall sensor of a switched reluctance motor, the method comprising: S100: fixing a magnetic ring, fixing a Hall switch circuit board on a bracket and embedding it into the rear end cover position of the motor; S200: removing the motor load, turning on the power supply and passing a constant current into the A-phase winding of the motor; S300: rotating the bracket counterclockwise and collecting the indication signal of the switch type Hall position sensor, and stopping the rotation and recording the number of steps N=1 when the indication signal changes from a high level to a low level; S400: rotating the motor shaft clockwise to rotate the rotor to an adjacent alignment position, recording the indication signal level and setting N=N+1, judging whether the correction is completed according to the indication signal and the number of steps N; if the number of steps N is less than or equal to the number of magnetic pole pairs of the magnetic ring and the indication signals recorded in the first N steps are not all low levels, it is determined that the correction is completed. The present invention reduces the installation error by verifying the detection effect of different alignment positions of the same phase.

Description

Technical Field

[0001] The present invention relates to the field of motor technology, and in particular to a method and system for correcting the installation position of a Hall sensor of a switched reluctance motor. Background Art

[0002] The Switched Reluctance Motor (SRM) is a motor that operates based on the principle of minimizing magnetic resistance. It has a simple structure, low cost, and high durability, so it has been widely used in electric vehicles, home appliances, industrial automation, etc. However, the precise control of SRM depends on accurate rotor position detection. To achieve this, Hall position sensors are usually installed in SRM to detect the position of the rotor relative to the stator.

[0003] Traditional methods of installing and calibrating Hall position sensors rely mainly on manual adjustment and visual observation, which is not only inefficient but also difficult to ensure accuracy. Especially in applications requiring high precision and high reliability, installation errors of Hall sensors can lead to unstable motor operation, increased noise, and even failure.

[0004] Therefore, there is an urgent need for a method and system for correcting the installation position of a Hall sensor of a switched reluctance motor to solve the problems existing in the current technology. Summary of the invention

[0005] In view of this, the present invention proposes a method and system for correcting the installation position of a Hall sensor in a switched reluctance motor, aiming to solve the problem that the installation position of the Hall position sensor in the current switched reluctance motor relies on workers' experience and visual observation, resulting in low efficiency and low precision.

[0006] On the one hand, the present invention provides a method for correcting the installation position of a Hall sensor of a switched reluctance motor, comprising:

[0007] S100: Fix the magnetic ring to the non-output end of the motor shaft, fix the Hall switch circuit board to the bracket, and embed the bracket into the rear end cover of the motor;

[0008] S200: Remove the load at the output end of the motor shaft, turn on the power supply and pass a constant current to the A-phase winding of the motor;

[0009] S300: rotating the bracket counterclockwise and collecting an indication signal of a switch-type Hall position sensor in the Hall switch circuit board, and stopping the rotation and recording the number of steps N=1 when the indication signal changes from a high level to a low level;

[0010] S400: Rotate the motor shaft clockwise in sequence to rotate the rotor to an adjacent alignment position, set N=N+1, collect the indication signal after each rotation, and determine whether the calibration is completed according to the indication signal and the number of steps N;

[0011] If the indication signal is at a low level and the number of steps N is less than the number of magnetic pole pairs of the magnetic ring, the motor shaft continues to rotate clockwise;

[0012] If the number of steps N is less than or equal to the number of magnetic pole pairs of the magnetic ring and the indication signals recorded in the first N steps are not all low level, it is determined that the calibration is completed;

[0013] If the number of steps N is greater than the number of magnetic pole pairs of the magnetic ring, and the indication signals collected in the first N steps are all low level, a subsequent correction process is performed, and the subsequent correction process includes:

[0014] S500: Rotate the bracket clockwise and collect the indication signal, and when the indication signal changes from a low level to a high level, stop the rotation and reset N=1;

[0015] S600: Rotate the motor shaft clockwise in sequence to rotate the rotor to an adjacent alignment position, set N=N+1, collect the indication signal after each rotation, and determine whether the calibration is completed according to the indication signal and the number of steps N;

[0016] If the indication signal is at a high level and the number of steps N is less than the number of magnetic pole pairs of the magnetic ring, the motor shaft continues to rotate clockwise;

[0017] If the number of steps N is less than or equal to the number of magnetic pole pairs of the magnetic ring and the indication signal changes from high level to low level, it is determined that the calibration is completed;

[0018] If the step number N is greater than the number of magnetic pole pairs of the magnetic ring, the indication signals collected in the first N steps are all high level, and the process returns to S300.

[0019] Furthermore, the indication signal includes:

[0020] Indicator light signal, when the switch type Hall position sensor outputs a high level, the indicator light is on, and when the switch type Hall position sensor outputs a low level, the indicator light is off.

[0021] Furthermore, the Hall switch circuit board is fixed on the bracket, and the bracket is embedded in the rear end cover of the motor, including:

[0022] The switch type Hall position sensor and the magnetic ring are located in the same plane.

[0023] Furthermore, the value of the constant current satisfies that: when the constant current is passed through the A-phase winding, the motor shaft can be rotated manually by applying an external force when the motor is no-loaded.

[0024] Compared with the prior art, the beneficial effect of the present invention is that a constant current is passed through the A-phase winding of the motor to ensure that the rotor is pulled to the alignment position of the A-phase. This process is automated and avoids human errors. The bracket is rotated counterclockwise to collect the indication signal of the Hall switch sensor in real time. When the signal changes from a high level to a low level, the rotation is stopped and the step number N=1 is recorded. This dynamic adjustment makes the Hall sensor close to the edge position of the magnetic pole. The motor shaft is rotated clockwise to rotate the rotor to the adjacent alignment position, and N=N+1 is set and the indication signal is collected. By detecting the signal change and comparing the step number N with the number of magnetic pole pairs of the magnetic ring, it is accurately determined whether the correction is completed. When the indication signal becomes a high level and the step number N is less than or equal to the number of magnetic pole pairs of the magnetic ring, it is determined that the correction is completed. By verifying the detection effect of different alignment positions of the same phase, the installation error is reduced, the high precision of the sensor installation is ensured, and the operating stability and reliability of the switched reluctance motor are improved.

[0025] On the other hand, the present application also provides a switched reluctance motor Hall sensor installation position correction system, which is used to apply the switched reluctance motor Hall sensor installation position correction method, including:

[0026] A switched reluctance motor comprises a motor rear end cover, a magnetic ring, a motor shaft, and a circuit board bracket; the magnetic ring is fixed to the non-output end of the motor shaft, and a switch type Hall position sensor is arranged on the Hall switch circuit board;

[0027] A DC power supply, connected to the A-phase winding lead of the switched reluctance motor through a power line;

[0028] A brushless motor controller detector, electrically connected to the switch-type Hall position sensor, for collecting an indication signal and transmitting the indication signal to a signal indicator light;

[0029] A signal indicator light is electrically connected to the brushless motor controller detector and is used to receive the indication signal.

[0030] It is understandable that the above-mentioned switched reluctance motor Hall sensor installation position correction method and system have the same beneficial effects, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0032] Figure 1 A flow chart of a method for correcting the installation position of a Hall sensor of a switched reluctance motor provided by an embodiment of the present invention;

[0033] Figure 2 Another flow chart of the method for correcting the installation position of the Hall sensor of the switched reluctance motor provided by the embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the installation position of the Hall sensor of the switched reluctance motor provided in an embodiment of the present invention;

[0035] Figure 4 A structural diagram of a switched reluctance motor Hall sensor installation position correction system provided by an embodiment of the present invention;

[0036] Figure 5 A system for verifying the calibration accuracy of switch type Hall position sensors.

[0037] Among them, 1. Hall switch circuit board; 2. Motor rear end cover; 3. Magnetic ring; 4. Motor shaft; 5. Circuit board bracket; 6. DC power supply; 7. Power cord; 8. A-phase winding lead wire; 9. Switched reluctance motor; 10. Switch type Hall position sensor; 11. Brushless motor controller tester; 12. Signal indicator light; 13. Coupling; 14. Rotary transformer; 15. Motor controller. DETAILED DESCRIPTION

[0038] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] The switch type Hall position sensor for the switched reluctance motor is mainly composed of a Hall switch circuit board, a circuit board bracket and a magnetic ring; the circuit board is indirectly fixed to the rear end cover of the motor through the bracket, and the number of switch type Hall position sensors welded on it is equal to the number of motor phases, and the phase difference between adjacent switches is consistent with the phase difference between two adjacent phases of the motor; the magnetic ring is fixed to the non-output end of the motor shaft, and multiple magnetic poles are evenly distributed in the circumferential direction inside it, and the polarities of adjacent magnetic poles are opposite, and the number of magnetic pole pairs is equal to the number of motor rotor poles. Therefore, if the motor rotor is in the stator and rotor pole alignment position of one phase, there is a switch type Hall position sensor aligned with the intersection of the magnetic poles, then the stator and rotor pole alignment and misalignment positions of each phase can be detected by the switch type Hall position sensor. The circumferential position of the magnetic ring relative to the rotor core is not only related to the circumferential position of the magnetic ring relative to the shaft, but also to the circumferential position of the shaft relative to the rotor core, so the circumferential position of the magnetic ring is difficult to accurately fix and determine. Therefore, in order to accurately detect the aligned and misaligned positions of each phase, it is generally necessary to correct the circumferential position of the circuit board bracket after the magnetic ring is fixed.

[0040] At present, the following correction method is often used: energize one phase winding of the switched reluctance motor to make the rotor in the alignment position of the phase; adjust the circumferential position of the circuit board bracket through human observation so that the corresponding switch type Hall position sensor is facing the junction of the magnetic poles. Although this method is simple to operate, its accuracy is difficult to guarantee and difficult to measure.

[0041] Therefore, there is an urgent need for a method for correcting the installation position of a Hall position sensor of a switched reluctance motor to solve the problems existing in the current technology.

[0042] On the one hand, see Figure 1 As shown, this embodiment provides a method for correcting the installation position of a Hall sensor of a switched reluctance motor, comprising:

[0043] S100: Fix the magnetic ring to the non-output end of the motor shaft, fix the Hall switch circuit board to the bracket, and embed the bracket into the rear end cover of the motor;

[0044] S200: Remove the load at the output end of the motor shaft, turn on the power supply and pass a constant current to the A-phase winding of the motor;

[0045] S300: rotating the bracket counterclockwise and collecting an indication signal of a switch-type Hall position sensor in the Hall switch circuit board, and stopping the rotation and recording the number of steps N=1 when the indication signal changes from a high level to a low level;

[0046] S400: Rotate the motor shaft clockwise in sequence to rotate the rotor to the adjacent alignment position, set N=N+1, collect the indication signal after each rotation, and judge whether the calibration is completed according to the indication signal and the step number N; if the step number N is less than or equal to the number of magnetic pole pairs of the magnetic ring and the indication signal changes from low level to high level, it is judged that the calibration is completed. If the indication signal is low level and the step number N is less than the number of magnetic pole pairs of the magnetic ring, continue to rotate the motor shaft clockwise.

[0047] Specifically, in S100, the magnetic ring is fixed to the non-output end of the motor shaft to ensure that the magnetic ring rotates synchronously with the shaft. The circuit board with the Hall switch welded is fixed on the bracket, and the bracket is embedded in the rear end cover of the motor to ensure that the position of the Hall switch is stable, which is convenient for subsequent calibration. In S200, all loads on the output end of the motor shaft are removed, and during the calibration process, it is ensured that: a small constant current is passed through the A-phase winding, so that the rotor can be rotated to the A-phase alignment position without causing overheating; and the rotor can be rotated to the adjacent alignment position during the A-phase winding is energized. A constant current is passed through the A-phase winding of the motor to automatically move the rotor to the A-phase alignment position. To improve the calibration efficiency, the A-phase winding should be kept energized during the rotation of the shaft. During the A-phase winding is energized, the change in the direction of the electromagnetic force on the shaft can be clearly felt during the rotation of the shaft. After the change in direction is felt, the external force on the shaft can be stopped, and the rotor will be automatically pulled to the adjacent alignment position by the A-phase electromagnetic force. This process uses electromagnetic force to pull the rotor to a known reference position, which is convenient for subsequent adjustment. In S300, the bracket is rotated counterclockwise and the signal of a switch-type Hall position sensor in the Hall switch circuit board is collected. When the indication signal of the Hall sensor changes from a high level to a low level, the rotation is stopped and the number of steps N=1 is recorded. Adjust so that the Hall sensor is close to the edge position of the magnetic pole. In S400, the motor shaft is rotated clockwise in sequence to make the rotor rotate to the adjacent alignment position, set N=N+1 and collect the indication signal of the Hall sensor, and judge whether the correction is completed based on the signal and the recorded number of steps N. If the number of steps N is less than or equal to the number of magnetic pole pairs of the magnetic ring and the indication signal changes from a low level to a high level, the correction is completed. If the indication signal is at a low level and the number of steps N is less than the number of magnetic pole pairs of the magnetic ring, continue to rotate the motor shaft clockwise.

[0048] It is understandable that the rotor is pulled to the alignment position by electromagnetic force and adjusted by real-time monitoring of the Hall sensor signal. Signal monitoring reduces human intervention and improves calibration accuracy and consistency. The rotor is automatically pulled by constant current and the position is adjusted by using the signal feedback of the Hall sensor, which improves the automation and efficiency of the calibration process. By ensuring that the levels of the corresponding Hall signals are not all the same when the rotor is in each alignment position of one phase, the Hall sensor can accurately detect the change of the magnetic pole in each alignment position, avoiding unstable operation caused by signal errors.

[0049] In some embodiments of the present application, see Figure 2 As shown, in the above S400 judgment, if the number of steps N is greater than the number of magnetic pole pairs of the magnetic ring, the indication signals collected in the first N steps are all low level, and the subsequent correction process is performed; the subsequent correction process includes:

[0050] Specifically, S500: rotating the bracket clockwise and collecting the indication signal, and when the indication signal changes from a low level to a high level, stopping the rotation and re-recording the number of steps so that N=1;

[0051] S600: Rotate the motor shaft clockwise in sequence to rotate the rotor to the adjacent alignment position, record the number of steps N=N+1 and collect the indication signal after each rotation, and judge whether the correction is completed according to the indication signal and the number of steps N; if the indication signal becomes low at an alignment position and the number of steps N is less than or equal to the number of magnetic pole pairs of the magnetic ring, the correction is determined to be completed; if the indication signal is high and the number of steps N is less than the number of magnetic pole pairs of the magnetic ring, continue to rotate the motor shaft clockwise; if N is equal to the number of magnetic pole pairs of the magnetic ring and the indication signals collected in the first N steps are all high, return to S300.

[0052] Understandably, H A Indicates the indication signal, N r Indicates the number of magnetic pole pairs of the magnetic ring. In the preliminary calibration step, by rotating the motor shaft, if the Hall sensor signal does not become high at any alignment position when the step number N is equal to the number of magnetic pole pairs of the magnetic ring, it is considered that the preliminary calibration has failed, and subsequent calibration is performed. In S500, the bracket is rotated clockwise and the indication signal of the Hall sensor is collected. When the indication signal changes from a low level to a high level, the rotation is stopped and N=1 is reset. This step is to reposition the Hall sensor so that it is accurately aligned with the edge of the magnetic pole. In S600, the motor shaft is rotated clockwise to rotate the rotor to the adjacent alignment position, the step number N=N+1 is recorded, and the indication signal of the Hall sensor is collected. It is determined whether the calibration is completed based on the signal and the step number N. If the indication signal becomes low at an alignment position and the step number N is less than or equal to the number of magnetic pole pairs of the magnetic ring, the calibration is completed. If the indication signal is at a high level and the step number N is less than the number of magnetic pole pairs of the magnetic ring, the motor shaft continues to rotate clockwise; if N is equal to the number of magnetic pole pairs of the magnetic ring and the indication signals collected in the first N steps are all at high levels, return to step S300 and restart the calibration.

[0053] It can be understood that during the initial calibration in S300, the bracket is rotated counterclockwise. When the signal changes from a high level to a low level, it means that the Hall sensor has just entered the edge area of ​​the magnetic pole from the detection area of ​​one magnetic pole. At this time, stop rotating so that the sensor is approximately at the boundary of the magnetic pole, which is convenient for confirming the accurate alignment position of the Hall sensor and the magnetic pole. In S500, the bracket is rotated clockwise. When the signal changes from a low level to a high level, the edge of the magnetic pole passes through the position aligned with the corresponding Hall switch in the opposite direction. If the amplitude of the Hall position change is very small, it can be approximately considered that the edge of the magnetic pole is aligned with the corresponding Hall switch, and then stop rotating.

[0054] It can be understood that by verifying the detection effect of different alignment positions of the same phase, it is ensured that the Hall sensor can accurately detect the position change at the edge of the magnetic pole, thereby improving the accuracy of the correction. By adjusting the bracket and the shaft, the sensor installation error is reduced, the accuracy of each correction position is ensured, and the stability and reliability of the motor operation are improved.

[0055] In some embodiments of the present application, the indication signal includes: an indicator light signal, when the switch type Hall position sensor outputs a high level, the indicator light is on, and when the switch type Hall position sensor outputs a low level, the indicator light is off.

[0056] In some embodiments of the present application, when the Hall switch circuit board is fixed on a bracket and the bracket is embedded in the rear end cover position of the motor, it includes: the switch type Hall position sensor and the magnetic ring are in the same plane.

[0057] In some embodiments of the present application, the value of the constant current satisfies: when the constant current is passed through the A-phase winding, the motor shaft can be rotated manually by applying an external force when the motor is no-loaded.

[0058] It is understandable that through the design of the indicator light signal, the operator can intuitively observe the working status of the Hall sensor, which is convenient for real-time monitoring and adjustment, and improves the efficiency and accuracy of calibration. Keeping the Hall switch circuit board and the magnetic ring in the same plane ensures that the Hall sensor can accurately detect the magnetic field changes of the magnetic ring, thereby improving the detection accuracy and calibration accuracy of the sensor. The constant current design ensures that the rotor can be stably pulled to the alignment position, making it easy to rotate the shaft to the adjacent alignment position during the power-on period of the A-phase winding.

[0059] In the above embodiment, a constant current is passed through the A-phase winding of the motor to ensure that the rotor is pulled to the alignment position of the A-phase. This process is automated and avoids human errors. The bracket is rotated counterclockwise to collect the indication signal of the Hall switch sensor in real time. When the signal changes from a high level to a low level, the rotation is stopped and the step number N=1 is recorded. This dynamic adjustment makes the Hall sensor close to the edge position of the magnetic pole. Rotate the motor shaft clockwise to rotate the rotor to the adjacent alignment position, set N=N+1 and collect the indication signal. By detecting the signal change and comparing the step number N and the number of magnetic pole pairs of the magnetic ring, it is accurately determined whether the correction is completed. When the indication signal becomes a high level and the step number N is less than or equal to the number of magnetic pole pairs of the magnetic ring, it is determined that the correction is completed. The installation error is reduced, the high precision of the sensor installation is ensured, and the operating stability and reliability of the switched reluctance motor are improved.

[0060] On the other hand, see Figure 3-4 As shown, the present application also provides a switched reluctance motor Hall sensor installation position correction system, which is used to apply the switched reluctance motor Hall sensor installation position correction method, including:

[0061] The switched reluctance motor 9 comprises a motor rear end cover 2, a magnetic ring 3, a motor shaft 4, a Hall switch circuit board 1, and a circuit board bracket 5; the magnetic ring 3 is fixed to the non-output end of the motor shaft 4, and a switch type Hall position sensor 10 is arranged on the Hall switch circuit board 1;

[0062] A DC power supply 6 is connected to an A-phase winding lead 8 of the switched reluctance motor through a power line 7;

[0063] A brushless motor controller detector 11, electrically connected to the switch type Hall position sensor 10, for collecting an indication signal and transmitting the indication signal to a signal indicator 12;

[0064] The signal indicator light 12 is electrically connected to the brushless motor controller 11 detector and is used to receive the indication signal.

[0065] It can be understood that a constant current is passed through the A-phase winding of the motor to ensure that the rotor is pulled to the alignment position of the A-phase. This process is automated and avoids human errors. Rotate the bracket counterclockwise to collect the indication signal of the Hall switch sensor in real time. When the signal changes from high level to low level, stop rotating and record the step number N as 1. This dynamic adjustment makes the Hall sensor close to the edge position of the magnetic pole. Rotate the motor shaft clockwise to make the rotor rotate to the adjacent alignment position, set N=N+1 and collect the indication signal. By detecting the signal change and comparing the step number N and the number of magnetic pole pairs of the magnetic ring, it is accurately determined whether the correction is completed. When the indication signal becomes high level and the step number N is less than or equal to the number of magnetic pole pairs of the magnetic ring, it is determined that the correction is completed. By verifying the detection effect of different alignment positions of the same phase, the installation error is reduced, the high accuracy of sensor installation is ensured, and the operating stability and reliability of the switched reluctance motor are improved.

[0066] To verify the above correction effect, refer to Figure 5 As shown, the calibrated motor is coaxially connected to the rotary transformer 14, and the motor controller 15 is used to detect the signals of the rotary transformer 14 and the switch type Hall position sensor 10. Before verification, a constant current is passed through the A phase winding to rotate the rotor to an alignment position of the A phase, and the deviation between the zero position of the rotary transformer 14 and the alignment position is obtained; the deviation is compensated so that the rotor position angle (denoted as θres) obtained by using the rotary transformer 14 at the alignment position is 180 electrical degrees. In the motor controller 15, the input port for receiving the Hall signal is configured as an external interrupt source, and the falling edge of the signal triggers an interrupt, and the value of θres is recorded in the interrupt program.

[0067] Rotate the motor clockwise for one circle, and get 8 values ​​of θres: 183, 179, 182, 184, 178, 183, 181 and 185 electrical degrees. It can be obtained that the average absolute error of the switch type Hall position sensor 10 in detecting the alignment position of phase A is only 2.625 electrical degrees, which is less than the difference between the maximum error (185-180 electrical degrees) and the minimum error (178-180 electrical degrees).

[0068] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0069] The present application is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0070] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0071] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for correcting the installation position of a Hall sensor of a switched reluctance motor, characterized in that: include: S100: Fix the magnetic ring to the non-output end of the motor shaft, fix the Hall switch circuit board to the bracket, and embed the bracket into the rear end cover of the motor; S200: Remove the load at the output end of the motor shaft, turn on the power supply and pass a constant current to the A-phase winding of the motor; S300: rotating the bracket counterclockwise and collecting an indication signal of a switch-type Hall position sensor in the Hall switch circuit board, and stopping the rotation and recording the number of steps N=1 when the indication signal changes from a high level to a low level; S400: Rotate the motor shaft clockwise in sequence to rotate the rotor to the adjacent alignment position, set N=N+1, collect the indication signal after each rotation, and determine whether the calibration is completed according to the indication signal and the number of steps N; If the indication signal is at a low level and the number of steps N is less than the number of magnetic pole pairs of the magnetic ring, the motor shaft continues to rotate clockwise; If the number of steps N is less than or equal to the number of magnetic pole pairs of the magnetic ring and the indication signal changes from low level to high level, the calibration is determined to be completed; If the number of steps N is greater than the number of magnetic pole pairs of the magnetic ring, the indication signals collected in the first N steps are all low level, and a subsequent correction process is performed; the subsequent correction process includes: S500: Rotate the bracket clockwise and collect the indication signal, and when the indication signal changes from a low level to a high level, stop the rotation and reset N=1; S600: Rotate the motor shaft clockwise in sequence to rotate the rotor to an adjacent alignment position, set N=N+1, collect the indication signal after each rotation, and determine whether the calibration is completed according to the indication signal and the number of steps N; If the indication signal is at a high level and the number of steps N is less than the number of magnetic pole pairs of the magnetic ring, the motor shaft continues to rotate clockwise; If the number of steps N is less than or equal to the number of magnetic pole pairs of the magnetic ring and the indication signal changes from high level to low level, it is determined that the calibration is completed; If the step number N is greater than the number of magnetic pole pairs of the magnetic ring, the indication signals collected in the first N steps are all high level, and the process returns to S300; The indication signal includes: Indicator light signal, when the switch type Hall position sensor outputs a high level, the indicator light is on, and when the switch type Hall position sensor outputs a low level, the indicator light is off; When the Hall switch circuit board is fixed on the bracket and the bracket is embedded in the rear end cover of the motor, it includes: The switch type Hall position sensor and the magnetic ring are located in the same plane.

2. The method for correcting the installation position of the Hall sensor of the switched reluctance motor according to claim 1, characterized in that: The value of the constant current satisfies that: when the constant current is passed through the A-phase winding, the motor shaft can be rotated by hand when an external force is applied under no-load conditions.

3. A switched reluctance motor Hall sensor installation position correction system, used for applying the switched reluctance motor Hall sensor installation position correction method according to any one of claims 1-2, characterized in that: include: A switched reluctance motor comprises a motor rear end cover, a magnetic ring, a motor shaft, and a circuit board bracket; the magnetic ring is fixed to the non-output end of the motor shaft, and a switch type Hall position sensor is arranged on the Hall switch circuit board; A DC power supply, connected to the A-phase winding lead of the switched reluctance motor through a power line; A brushless motor controller detector, electrically connected to the switch-type Hall position sensor, for collecting an indication signal and transmitting the indication signal to a signal indicator light; A signal indicator light is electrically connected to the brushless motor controller detector and is used to receive the indication signal.

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