Calibration device, calibration system, split encoder and motor

Abstract

The utility model relates to a calibration device and system, a split type encoder and a motor, the split type encoder comprises a rotor and a stator, and the calibration device is used for calibration between the stator and the rotor; the calibration device comprises a positioning structure used for installing the stator, the positioning structure comprises a positioning shaft and a positioning plate vertically arranged on the positioning shaft, and the positioning plate is provided with a fastener used for being connected with the stator; and the self-calibration structure comprises a driving module, and the driving module is arranged on a shell of the positioning shaft and used for sending a self-calibration instruction to the stator and driving the positioning plate to rotate. According to the split-type encoder, the self-calibration structure and the positioning structure are installed on the split-type encoder, the self-calibration structure drives the stator in the split-type encoder to rotate and perform self-calibration for error compensation, calibration can be performed even after the encoder is installed on a motor, the performance of the split-type encoder is improved, and the split-type encoder is more stable in performance. The problem that the performance of a split type encoder needs to be improved is solved.

Description

Technical Field

[0001] This application relates to the field of encoder technology, and in particular to a calibration device, system, split encoder, and motor. Background Technology

[0002] Split-type encoders are smaller and have no bearings, making their structure simpler compared to integral encoders. However, because split-type encoders require separate installation of the stator and rotor, installation deviations can occur due to installation process variations, affecting the encoder's accuracy.

[0003] Currently, split encoders can only improve the installation position accuracy between the stator and rotor by improving the precision of the mechanical structure. After the encoder is installed on the motor, in order to prevent safety risks to the motor driven object, it is impossible to calibrate the encoder by rotating the motor at the application site to compensate for mechanical structure installation errors. In particular, the performance of split encoders will be reduced as mechanical structure deformation and wear increase with the years of use.

[0004] There is currently no effective solution to the problem that the performance of split encoders in related technologies needs to be improved. Utility Model Content

[0005] Therefore, it is necessary to provide a calibration device, system, separate encoder, and motor that can improve the performance of a separate encoder by rotational self-calibration after the separate encoder is installed, in order to address the above-mentioned technical problems.

[0006] In a first aspect, this embodiment provides a calibration device for a split-type encoder, the split-type encoder including a rotor and a stator, the calibration device being used for calibration between the stator and the rotor; the calibration device includes:

[0007] A positioning structure for mounting the stator, the positioning structure including a positioning shaft and a positioning plate vertically disposed on the positioning shaft, the positioning plate being provided with fasteners for connecting the stator;

[0008] The self-calibration structure includes a drive module disposed in the housing of the positioning shaft, which is used to send a self-calibration command to the stator and drive the positioning plate to rotate.

[0009] In some embodiments, the fasteners include at least two; the at least two fasteners are also used to abut the rotor.

[0010] In some embodiments, one end of the fastener is connected to the positioning plate, and the other end is used to connect to the stator. The end of the fastener connected to the stator is also used to abut against the rotor. The fastener is detachably connected to the positioning plate. One end of the positioning shaft is detachably connected to the motor on which the rotor is mounted.

[0011] In some embodiments, the drive module includes a motor for driving the positioning plate to rotate, and a host computer for communicating with the stator. The host computer or the stator is provided with a self-calibration module, which is used to perform self-calibration based on the electrical signal transmitted by the stator when the self-calibration command is received.

[0012] In some embodiments, the self-calibration structure further includes an indicator light and a start button disposed on the housing of the positioning shaft;

[0013] The start button is connected to the motor and the host computer respectively, and is used to trigger the motor to start rotating and to trigger the host computer to issue a self-calibration command.

[0014] The indicator light is connected to the host computer and is used to indicate whether the self-calibration is complete.

[0015] Secondly, this embodiment provides a split encoder, including a rotor and a stator, the stator and the rotor being coaxial and parallel, and the stator and the rotor being spaced apart by a preset distance; the stator and the rotor are calibrated by the calibration device described in the first aspect.

[0016] In some embodiments, the rotor includes a rotor base and rotor coils disposed on the rotor base, and the stator includes an inductor module.

[0017] Thirdly, this embodiment provides a motor, including: a calibration device for the split encoder as described in the first aspect; the motor includes a motor mounting structure, the rotor is coaxially fixed to the motor mounting structure, and the positioning shaft is coaxially connected to the motor mounting structure to drive the stator to be positioned and calibrated relative to the rotor.

[0018] In some embodiments, the motor mounting structure includes an internal boss and an external boss arranged coaxially with the motor shaft, the rotor is fixed to the outer wall of the internal boss, and the positioning shaft is connected to the inner wall of the internal boss; the stator is mounted on a tensioning ring; the tensioning ring is capable of being tensioned to the inner wall of the external boss to fix the stator to the motor.

[0019] Fourthly, this embodiment provides a calibration system for a split encoder, applied to the motor described in the third aspect, comprising:

[0020] A pre-installation unit for detachably connecting the stator to the side of the calibration device closest to the rotor;

[0021] A positioning unit is used to detachably connect the calibration device to the internal boss so that the fastener abuts against the rotor;

[0022] A self-calibration unit is used to drive the stator rotation and self-calibrate via the calibration device;

[0023] A fixing unit is used to tighten the tensioning ring to fix the stator to the external boss and to remove the calibration device.

[0024] Compared with related technologies, the calibration device, system, split encoder, and motor provided in this embodiment are different. The split encoder includes a rotor and a stator, and the calibration device is used for calibration between the stator and the rotor. The calibration device includes: a positioning structure for mounting the stator, the positioning structure including a positioning shaft and a positioning plate vertically disposed on the positioning shaft, the positioning plate being provided with fasteners for connecting the stator; and a self-calibration structure including a drive module disposed in the housing of the positioning shaft, used to send self-calibration commands to the stator and drive the positioning plate to rotate. Through this embodiment, by installing a self-calibration structure and a positioning structure on the split encoder, the self-calibration structure drives the stator rotation in the split encoder to perform self-calibration and error compensation. Calibration can be performed even after the encoder is installed in the motor, improving the performance of the split encoder and solving the problem that the performance of split encoders needs to be improved.

[0025] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of a calibration device for a split encoder in one embodiment;

[0028] Figures 2a-2h This is a schematic diagram of the installation steps of a split encoder calibration device in one embodiment. Detailed Implementation

[0029] To better understand the purpose, technical solution, and advantages of this application, the application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0030] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these” used in this application do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or modules (units) is not limited to the listed steps or modules (units) but may include steps or modules (units) not listed, or may include other steps or modules (units) inherent to these processes, methods, products, or devices. Words such as “connected,” “linked,” and “coupled” used in this application are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. “Multiple” used in this application refers to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can represent: A alone, A and B simultaneously, and B alone. Normally, the character " / " indicates that the objects before and after it are in an "or" relationship. The terms "first," "second," "third," etc., used in this application are merely to distinguish similar objects and do not represent a specific order of objects.

[0031] This embodiment provides a calibration device for a split encoder, which includes a rotor and a stator. The calibration device is used for calibration between the stator and the rotor. Figure 1 This is a schematic diagram of the calibration device for a split encoder, as shown below. Figure 1 As shown, the calibration device includes:

[0032] A positioning structure for mounting a stator. The positioning structure includes a positioning shaft and a positioning plate vertically mounted on the positioning shaft. The positioning plate is provided with fasteners for connecting the stator. The positioning plate is rotatably connected to the positioning shaft.

[0033] The self-calibration structure includes a drive module, which is located in the housing of the positioning shaft and is used to send self-calibration commands to the stator and drive the positioning plate to rotate.

[0034] Specifically, a split encoder includes a rotor and a stator. The rotor is usually made of a magnetic material (such as soft iron or silicon steel sheet) and its surface is machined with periodically distributed grooves or special geometric patterns (such as a sinusoidal wave-shaped concave-convex structure). The stator usually contains two or more sets of coils. The excitation coil is used to input high-frequency AC signals (such as 5~10kHz) to generate an alternating magnetic field. The induction coil is used to receive magnetic field change signals and output a voltage waveform related to the rotor position.

[0035] The calibration device includes a positioning structure and a self-calibration structure. The positioning structure includes a positioning shaft for axial coaxial positioning of the stator and rotor; a positioning plate is also vertically mounted on the positioning shaft for radial parallel positioning of the stator and rotor; fasteners are provided on the positioning plate, and the stator of the split encoder is coaxially fixed to the positioning plate by the fasteners on the positioning plate, thereby ensuring axial and radial positioning between the rotor and stator through the positioning structure. The fasteners on the positioning plate can be detachable parts such as screws, and their number is not specifically limited. The more fasteners, the better the parallelism of the rotor and stator is guaranteed.

[0036] The self-calibration structure includes a drive module, which is located in the housing of the positioning shaft. The drive module is used to drive the positioning plate to rotate the stator, causing the stator and rotor to rotate relative to each other and generate electrical signals. At the same time, it sends a self-calibration command to the stator to start the self-calibration mode and communicates with the stator to receive and transmit electrical signals, thereby achieving automatic calibration.

[0037] The calibration device in this embodiment pre-positions the positional relationship between the stator and rotor in the split encoder through the positioning structure, ensuring high precision requirements for the coaxiality and parallelism of the stator and rotor installation. The self-calibration structure drives the stator rotation in the split encoder to perform self-calibration and compensate for installation errors. The combination of these two measures significantly improves the accuracy of the split encoder. Even after the encoder is installed in the motor, calibration can be performed at the motor application site, improving the accuracy performance of the encoder during use, enhancing the performance of the split encoder, and solving the problem that the performance of the split encoder needs to be improved.

[0038] In some of these embodiments, such as Figure 1 As shown, the fasteners include at least two; at least two fasteners are also used to abut the rotor.

[0039] Specifically, the fasteners, besides securing the stator to the positioning plate, can also be used for spacing positioning between the stator and rotor. Spacing positioning is achieved by having the fastener abut against the rotor. At least two fasteners can ensure that the positioning plate and rotor are parallel to each other while maintaining spacing positioning. The fasteners can specifically be positioning screws; the stator has pre-drilled positioning holes that match the position and thread of the positioning screws, which are then wedged into the positioning holes and abut against the rotor base. Furthermore, to ensure that the plate spacing between the rotor and stator of the split encoder is within an effective range, the length of the positioning screws must be adapted to the plate spacing requirements between the rotor and stator, and the positioning structure must be rotated during the installation of the positioning shaft until the positioning screws are wedged into the positioning holes and abut against the rotor base.

[0040] By fixing the stator to the positioning structure in this embodiment, and by ensuring that the fasteners abut against the rotor when installing the positioning structure, the plate spacing between the rotor and stator of the split encoder can be kept within an effective range, thereby ensuring the performance and reliable operation of the split encoder.

[0041] In some of these embodiments, such as Figure 1 As shown, one end of the fastener is connected to the positioning plate, and the other end is used to connect to the stator. The end of the fastener connected to the stator is also used to abut against the rotor. The fastener and the positioning plate are detachably connected. One end of the positioning shaft is used to detachably connect to the motor on which the rotor is installed.

[0042] In this embodiment, the fastener connects the stator and abuts the rotor at the same end, placing the stator between the rotor and the positioning plate. The detachable connection between the fastener and the positioning plate, as well as the detachable connection structure on the rotor side of the positioning shaft, allows the entire calibration device to be connected and disassembled from the same side of the stator. This facilitates the removal of the calibration device after the stator and rotor are positioned and calibrated. Specifically, both the fastener and the positioning plate can be detachably connected via threaded connections.

[0043] In some of these embodiments, such as Figure 1 As shown, the drive module includes a motor for driving the positioning plate to rotate, and a host computer for communicating with the stator. The host computer or the stator is equipped with a self-calibration module, which is used to perform self-calibration based on the electrical signal transmitted by the stator when a self-calibration command is received.

[0044] Specifically, the motor drives the positioning plate to rotate, which in turn drives the stator to rotate. Since the rotor does not rotate at this time, a relative rotation between the stator and rotor is achieved, thereby generating an encoder electrical signal. Furthermore, the motor has a forward and reverse rotation adjustment function to meet the forward and reverse rotation requirements of the split encoder's self-calibration. The self-calibration module contains a self-calibration program. The host computer sends a command to the self-calibration module to start the self-calibration, and the self-calibration module then runs the self-calibration program. The self-calibration module also communicates with the stator, receiving the electrical signal emitted after the stator rotates, and performs self-calibration based on this signal. The self-calibration module can be located within the stator, meaning the split encoder has a self-calibration function; or it can be located in the host computer.

[0045] In some of these embodiments, such as Figure 1 As shown, the self-calibration structure also includes an indicator light and a start button located on the housing of the positioning shaft; the start button is connected to the motor and the host computer respectively, and is used to trigger the motor to rotate and to trigger the host computer to issue a self-calibration command; the indicator light is connected to the host computer and is used to indicate whether the self-calibration is complete.

[0046] Specifically, pressing the start button activates the motor, driving the positioning plate to rotate. Simultaneously, the host computer is activated, issuing a self-calibration command to begin running the self-calibration program. Indicator lights indicate whether the self-calibration program has completed, facilitating operation and observation of the calibration process. For example, the indicator light is red when the self-calibration program starts and turns green when the program is complete.

[0047] In some of these embodiments, such as Figure 1 As shown, the stator is equipped with a communication component, which is connected to the host computer of the self-calibration structure to transmit the voltage values ​​collected by the stator.

[0048] Specifically, the communication components on the stator are connected to the host computer via cables. After starting rotation and self-calibration, the self-calibration program is activated. At this time, the stator and rotor rotate relative to each other. The self-calibration module collects and compensates for the voltage values ​​obtained by the stator induction coil under different installation environments, and stores the calibrated voltage values ​​in the stator, thereby ensuring the accuracy requirements of the split encoder after installation. For example, the stator rotates more than one revolution, and the self-calibration module collects voltage signals corresponding to several different rotation angles. It automatically calibrates the phase, gain, offset, and other parameters of the voltage signals to eliminate offset errors caused by installation, adjusting the voltage signal input to the self-calibration module to the optimal value for higher accuracy. After calibration, the calibrated data is automatically stored in the stator, thereby eliminating installation errors and improving the accuracy and reliability of the split encoder's output signal.

[0049] In this embodiment, a split-type encoder is provided. For example... Figure 1As shown, it includes a rotor and a stator, which are coaxial and arranged in parallel, with a preset distance between them; the stator and rotor are calibrated by the calibration device described in the above embodiment.

[0050] Specifically, the calibration device in the above embodiments ensures that the coaxiality, parallelism, and spacing between the stator and rotor of the split encoder remain within an effective range. Based on this, the electrical signals are automatically calibrated to compensate for installation errors, further improving the encoder's accuracy.

[0051] In some embodiments, the rotor includes a rotor base and rotor coils disposed on the rotor base, and the stator includes an inductor module.

[0052] Specifically, the split-type encoder is an inductive encoder, with both the stator and rotor being plate-type structures. The rotor base is the core supporting structure of the rotor, typically made of magnetically conductive materials (such as laminated silicon steel sheets) or non-magnetically conductive metals (such as aluminum alloys), providing a low magnetic reluctance path for the magnetic field and enhancing magnetic flux efficiency. The rotor coil is embedded in the outer rotor base, generating a magnetic field after energization to achieve electromechanical energy conversion. Fasteners can abut against the rotor base.

[0053] This embodiment provides a motor, including the split encoder described in the above embodiments. For example... Figure 1 As shown, the motor includes a motor mounting structure, a rotor coaxially fixed to the motor mounting structure, and a positioning shaft coaxially connected to the motor mounting structure to drive the stator to position and calibrate relative to the rotor.

[0054] Understandably, the motor mounting structure is connected to the motor rotor so that the rotor of the split encoder can be connected to the motor rotor. The positioning shaft and the encoder rotor achieve coaxial positioning through the motor mounting structure.

[0055] Specifically, the motor can be a servo motor, stepper motor, or permanent magnet synchronous motor, etc. Furthermore, this calibration device is also applicable to traction machines, industrial robots, CNC machine tools, and other devices that use the aforementioned motors. Taking an elevator traction machine as an example, in the scenario of encoder maintenance, the traction machine is already connected to the elevator car. For safety reasons, the traction machine cannot be started if there is a risk of encoder failure. In this case, the calibration device drives the stator to perform rotational self-calibration, eliminating the need to drive the motor to rotate, thus completing encoder maintenance and ensuring safety.

[0056] In some embodiments, the motor mounting structure includes an internal boss and an external boss arranged coaxially with the motor shaft, the rotor is fixed to the outer wall of the internal boss, and the positioning shaft is connected to the inner wall of the internal boss; the stator is mounted on a tensioning ring; the tensioning ring can be tensioned to the inner wall of the external boss to fix the stator to the motor.

[0057] It is understood that the internal and external bosses are coaxially arranged and both extend away from the motor, forming the mounting chamber of the split encoder. The rotor and the positioning shaft are respectively connected to the internal boss, and the stator is finally fixed to the external boss. Specifically, the inner diameter of the internal boss is adapted to the outer diameter of the positioning shaft to facilitate the installation of the positioning shaft on the inner wall of the internal boss. For example, the inner wall of the internal boss can be a threadless hole, and the positioning shaft is fixed with a nut after passing through the internal boss. Preferably, the inner wall of the internal boss has an internal thread that matches the positioning shaft, and the positioning shaft is correspondingly provided with an external thread. The two are connected by threads, which facilitates installation and disassembly. The rotor is fixed to the outer wall of the internal boss. Specifically, the size of the rotor base can be slightly smaller than the inner diameter of the external boss to reduce the gap between the two and reduce the intrusion of external substances such as dust and oil between the motor and the split encoder. In this embodiment, the stator is mounted on a tensioning ring so that it can be fixed to the external boss by the tension of the tensioning ring, or can be rotated within the external boss by contraction. Specifically, upon completion of self-calibration, tightening the tension ring screws of the tension ring achieves tension, thereby fixing the stator to the motor.

[0058] Specifically, a tensioning ring is a mechanical component used to fix and adjust coaxiality. The stator is mounted on the tensioning ring, which can be a whole by fitting the stator onto the outer ring of the tensioning ring, and the tensioning ring is coaxial and parallel to the rotor.

[0059] When self-calibration is complete, tighten the tension ring screws to expand the inner ring of the tension ring outward and fit tightly against the motor mounting surface to fix the stator to the motor while maintaining the coaxiality of the stator and rotor.

[0060] In this embodiment, when the self-calibration is completed, the tension ring screw is tightened to fix the stator and rotor coaxially, which can fix the stator to the motor and ensure the coaxiality of the stator and rotor.

[0061] Specifically, the self-calibration structure and positioning structure are detachably connected to the stator, and the self-calibration structure is suitable for various types of split encoders. After self-calibration is completed and the stator and motor are fixed by tightening the tension ring screws, the positioning structure and self-calibration structure can be removed from the stator by removing the fasteners and positioning shaft on the positioning plate. This allows for the reuse of the self-calibration structure, making it suitable for testing, installation, and maintenance scenarios, while also reducing the weight and complexity of split encoder equipment.

[0062] The present embodiment will now be described and illustrated through preferred embodiments.

[0063] like Figure 1 As shown, this embodiment provides a calibration device for a split encoder, which includes a rotor and a stator. The calibration device includes a positioning structure and a self-calibration structure.

[0064] The rotor includes a rotor coil and a rotor base located on the periphery, with the rotor coil embedded in the rotor base; the rotor is coaxially fixed to the motor through the external mounting structure of the motor.

[0065] The positioning structure includes a positioning shaft, a positioning plate vertically fixed to the positioning shaft, and positioning screws on the positioning plate. The positioning shaft is threaded to the inner wall of the internal boss of the motor mounting structure.

[0066] The stator is mounted on the tension ring. The stator includes an inductor module with communication components and has pre-drilled positioning holes for the positioning screws. Tightening the positioning screws coaxially fixes the stator to the motor side of the positioning structure. Furthermore, the length of the selected positioning screws must match the required plate spacing between the rotor and stator. The positioning shaft is rotated within the internal boss until the positioning screws abut against the rotor base to ensure the required plate spacing between the rotor and stator. At this point, the positioning shaft is also fixed within the internal boss.

[0067] The self-calibration structure includes a host computer, a motor, indicator lights, and a start button. The host computer is electrically connected to the stator, indicator lights, and start button, while the motor is connected to the positioning plate and start button. The stator contains a self-calibration module. The host computer sends self-calibration commands to the self-calibration module. The start button triggers the motor to rotate and the host computer to send the self-calibration command. At this time, the motor, located on the positioning shaft housing, drives the positioning plate to rotate the stator. Simultaneously, the self-calibration module is activated. The stator outputs voltage values ​​from its induction coils through relative rotation with the rotor, which are then sent to the self-calibration module. The self-calibration module performs calibration and stores these voltage values, thus achieving self-calibration. Additionally, indicator lights show whether self-calibration is complete. Both the self-calibration module and the motor can rotate bidirectionally in both forward and reverse directions, allowing the split encoder to adapt to different application scenarios and meet the self-calibration requirements of various installation conditions.

[0068] Upon completion of self-calibration, tighten the tension ring screws to expand the inner ring of the tension ring outwards, ensuring a tight fit against the inner wall of the external boss of the motor mounting structure. This secures the stator to the motor while maintaining the coaxiality of the stator and rotor. Finally, after self-calibration, remove the positioning screws and positioning shaft to dismantle the positioning structure and self-calibration structure.

[0069] In this embodiment, a calibration system for a split encoder is provided, applied to the aforementioned motor, comprising:

[0070] Pre-installation unit for detachably connecting the stator to the side of the calibration device closest to the rotor;

[0071] A positioning unit is used to detachably connect the calibration device to the internal boss so that the fastener abuts against the rotor;

[0072] The self-calibration unit is used to drive stator rotation and self-calibrate via a calibration device.

[0073] The fixing unit is used to tighten the tensioning ring to fix the stator to the external boss and remove the calibration device.

[0074] Specifically, the calibration system in this embodiment can be implemented using automated equipment.

[0075] This embodiment provides an installation method for a split-type encoder calibration device. Figures 2a to 2h These are schematic diagrams illustrating the installation steps of the split encoder calibration device. Each step corresponds to one of the following steps, which are part of the installation method:

[0076] S1, the rotor is coaxially mounted to the motor mounting structure;

[0077] S2, fix the stator to the tension ring;

[0078] S3, tighten the positioning screws on the positioning plate of the positioning structure to fix the stator to the positioning structure;

[0079] S4 connects the stator's communication components to the host computer of the self-calibration structure.

[0080] S5, the positioning structure is fixed to the motor by the positioning shaft, and the positioning shaft is rotated until the positioning screw abuts against the rotor base;

[0081] S6. Start the self-calibration function using the start button of the self-calibration structure, and observe the indicator light to confirm that the self-calibration is complete.

[0082] S7, the stator is fixed to the motor by tightening the tension ring screw;

[0083] S8, unscrew the positioning screws to remove the positioning structure and self-calibration structure.

[0084] The calibration device and installation method provided in this embodiment enable the installation of a detachable self-calibration structure and positioning structure on a split encoder. The self-calibration structure drives the stator rotation in the split encoder to perform self-calibration and error compensation. Calibration can be performed even after the encoder is installed in the motor. After self-calibration is completed, the self-calibration structure and positioning structure can be removed. At the same time, this installation method can also ensure the high precision requirements of coaxiality, parallelism and plate spacing of the stator and rotor. The installation is simple and the performance of the split encoder is improved.

[0085] It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. All other embodiments derived by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0086] Obviously, the accompanying drawings are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar situations based on these drawings without any creative effort. Furthermore, it is understood that although the work done in this development process may be complex and lengthy, for those skilled in the art, certain design, manufacturing, or production modifications made based on the technical content disclosed in this application are merely conventional technical means and should not be considered as insufficient disclosure of this application.

[0087] The term "embodiment" in this application refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily imply the same embodiment, nor does it imply that it is mutually exclusive with or alternative to other embodiments. It will be clearly or implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0088] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A calibration device for a split encoder, the split encoder comprising a rotor and a stator, the calibration device for calibration between the stator and the rotor; characterized in that, The calibration device includes: A positioning structure for mounting the stator, the positioning structure including a positioning shaft and a positioning plate vertically disposed on the positioning shaft, the positioning plate being provided with fasteners for connecting the stator; The self-calibration structure includes a drive module disposed in the housing of the positioning shaft, which is used to send a self-calibration command to the stator and drive the positioning plate to rotate.

2. The calibration apparatus for a split encoder according to claim 1, characterized in that, The fasteners include at least two; at least two of the fasteners are also used to abut the rotor.

3. The calibration apparatus for a split encoder according to claim 2, wherein One end of the fastener is connected to the positioning plate, and the other end is used to connect to the stator. The end of the fastener connected to the stator is also used to abut against the rotor. The fastener is detachably connected to the positioning plate. One end of the positioning shaft is detachably connected to the motor on which the rotor is mounted.

4. The calibration apparatus for a split encoder according to claim 1, wherein The drive module includes a motor for driving the positioning plate to rotate, and a host computer for communicating with the stator. The host computer or the stator is provided with a self-calibration module, which is used to perform self-calibration based on the electrical signal transmitted by the stator when the self-calibration command is received.

5. The calibration apparatus for a split encoder according to claim 4, wherein The self-calibration structure also includes an indicator light and a start button disposed on the housing of the positioning shaft; The start button is connected to the motor and the host computer respectively, and is used to trigger the motor to start rotating and to trigger the host computer to issue a self-calibration command. The indicator light is connected to the host computer and is used to indicate whether the self-calibration is complete.

6. A split encoder comprising a rotor and a stator, characterized in that, The stator and the rotor are arranged coaxially and in parallel, and there is a predetermined distance between the stator and the rotor; the stator and the rotor are calibrated by the calibration device according to any one of claims 1-5.

7. The split encoder of claim 6, wherein, The rotor includes a rotor base and rotor coils disposed on the rotor base, and the stator includes an inductor module.

8. An electric machine characterized by The split encoder as described in claim 6 includes a motor mounting structure, a rotor coaxially fixed to the motor mounting structure, and a positioning shaft coaxially connected to the motor mounting structure to drive the stator to position and calibrate relative to the rotor.

9. The motor according to claim 8, characterized in that, The motor mounting structure includes an internal boss and an external boss arranged coaxially with the motor's rotating shaft. The rotor is fixed to the outer wall of the internal boss, and the positioning shaft is connected to the inner wall of the internal boss. The stator is mounted on a tensioning ring. The tensioning ring can be tensioned to the inner wall of the external boss to fix the stator to the motor.

10. A calibration system for a split encoder applied to the electric machine of claim 9, characterized by, include: A pre-installation unit for detachably connecting the stator to the side of the calibration device closest to the rotor; A positioning unit is used to detachably connect the calibration device to the internal boss so that the fastener abuts against the rotor; A self-calibration unit is used to drive the stator rotation and self-calibrate via the calibration device; A fixing unit is used to tighten the tensioning ring to fix the stator to the external boss and to remove the calibration device.

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