Motor control system

Abstract

The invention relates to a motor control system. The motor control system comprises a motor, a signal processing assembly, a controller and a position sensor, the motor comprises a rotor; the position sensor is connected with the input end of the controller through the signal processing assembly, and the output end of the controller is connected with the rotor. The position sensor is used for collecting an initial voltage signal aiming at the position of the rotor; the signal processing component is used for processing the initial voltage signal to generate a target voltage signal; the controller is used for driving the rotor to move based on the target voltage signal. Thus, after the position sensor collects the initial voltage signal for the position of the rotor, the initial voltage signal is processed through the signal processing assembly, the target voltage signal is generated, the processing precision of the initial voltage signal is improved, and then the accuracy of rotor position detection is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of motor technology, and in particular to a motor control system. Background Art

[0002] With the continuous advancement of magnetic levitation technology, magnetic levitation motors have been widely adopted and applied in transportation, industrial automation and other fields due to their high efficiency, low noise and low maintenance cost.

[0003] The magnetic levitation motor uses the electromagnetic force generated by the magnetic bearing to suspend the rotor at a given position, so that the rotor and the magnetic bearing are non-contact, achieving frictionless and high-speed operation. During operation, the motor needs to detect the suspension position of the rotor in real time through the position sensor to control the magnetic bearing to generate the corresponding electromagnetic force to drive the rotor to move. Therefore, the accuracy of the rotor position detection is crucial to the motor's operating performance. However, current magnetic levitation motors usually drive the rotor to move directly based on the signal collected by the position sensor, and the above signal is less processed and the processing accuracy is poor, thereby reducing the accuracy of the rotor position detection. Summary of the invention

[0004] In order to solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides a motor control system.

[0005] The present disclosure provides a motor control system, comprising: a motor, a signal processing component, a controller and a position sensor; the motor comprises a rotor;

[0006] The position sensor is connected to the input end of the controller through the signal processing component, and the output end of the controller is connected to the rotor;

[0007] The position sensor is used to collect an initial voltage signal corresponding to the position of the rotor; the signal processing component is used to process the initial voltage signal to generate a target voltage signal; and the controller is used to drive the rotor to move based on the target voltage signal.

[0008] Optionally, the signal processing component includes: a waveform shaping element, a waveform generating element and a comparator;

[0009] The waveform shaping element and the waveform generating element are respectively connected to the comparator;

[0010] The waveform shaping element is used to shape the initial voltage signal into a sinusoidal wave signal; the waveform generating element is used to generate a reference waveform signal; and the comparator is used to perform waveform comparison between the sinusoidal wave signal and the reference waveform signal.

[0011] Optionally, the signal processing component further comprises: a rectifier;

[0012] The rectifier is connected to the comparator;

[0013] The rectifier is used to rectify the sine wave signal after waveform comparison into a DC voltage signal.

[0014] Optionally, the signal processing component further comprises: an amplifying element;

[0015] The amplifying element is connected to the rectifier;

[0016] The amplifier element is used to amplify the DC voltage signal to obtain the target voltage signal.

[0017] Optionally, a power supply assembly is also included;

[0018] The power supply component is connected to the signal processing component and the controller.

[0019] Optionally, the power supply assembly includes a voltage conversion element.

[0020] Optionally, the motor control system further includes a voltage stabilizing component;

[0021] The voltage stabilizing component is connected to the signal processing component and the power supply component.

[0022] Optionally, the motor further comprises a housing;

[0023] The signal processing component, the controller and the position sensor are all disposed outside the housing.

[0024] Optionally, the position sensor is an eddy current sensor.

[0025] Optionally, the motor control system further includes a display device;

[0026] The display device is connected to the controller;

[0027] The display device is used to display the position of the rotor.

[0028] Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

[0029] The motor control system provided by the embodiment of the present disclosure includes: a motor, a signal processing component, a controller and a position sensor; the motor includes a rotor; the output end of the rotor is connected to the input end of the controller through the position sensor and the signal processing component in sequence, and the output end of the controller is connected to the input end of the rotor; the position sensor is used to collect the initial voltage signal for the position of the rotor; the signal processing component is used to process the initial voltage signal to generate a target voltage signal; the controller is used to drive the rotor to move based on the target voltage signal. In this way, after the position sensor collects the initial voltage signal for the position of the rotor, the initial voltage signal is processed by using the signal processing component to generate a target voltage signal, thereby improving the processing accuracy of the initial voltage signal, and thus improving the accuracy of the rotor position detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] Figure 1 A schematic diagram of the structure of a motor control system provided by an embodiment of the present disclosure;

[0033] Figure 2 A schematic diagram of the structure of another motor control system provided by an embodiment of the present disclosure;

[0034] Figure 3 A schematic diagram of the structure of a power supply assembly provided in an embodiment of the present disclosure;

[0035] Figure 4 A schematic diagram of the structure of another motor control system provided in an embodiment of the present disclosure.

[0036] Among them, 110, motor; 111, rotor; 112, housing; 120, signal processing component; 121, waveform shaping element; 122, waveform generating element; 123, comparator; 124, rectifier; 125, amplifier element; 126, clock source; 130, controller; 140, position sensor; 150, power supply component; 151, voltage conversion element; 152, power protection element; 160, voltage stabilizing component; 170, display device. DETAILED DESCRIPTION

[0037] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0039] The motor control system provided by the embodiments of the present disclosure is exemplarily described below with reference to the accompanying drawings.

[0040] Figure 1 This is a schematic diagram of the structure of a motor control system provided by an embodiment of the present disclosure. Figure 1 The motor control system includes: a motor 110, a signal processing component 120, a controller 130 and a position sensor 140; the motor 110 includes a rotor 111; the position sensor 140 is connected to the input end of the controller 130 through the signal processing component 120, and the output end of the controller 130 is connected to the rotor 111; the position sensor 140 is used to collect an initial voltage signal for the position of the rotor 111; the signal processing component 120 is used to process the initial voltage signal to generate a target voltage signal; the controller 130 is used to drive the rotor 111 to move based on the target voltage signal.

[0041] The rotor 111 is a structure in the motor 110 that is in a suspended state and can move in a controlled manner. For example, the rotor 111 can be controlled to achieve a rotational motion around an axis, or a linear motion along a straight line.

[0042] Exemplarily, the motor 110 generally also includes a stator and a magnetic bearing, both of which are arranged around the rotor 111. In actual applications, the stator, the magnetic bearing and the rotor 111 can all be composed of electromagnets, and an interacting electromagnetic field can be formed between the three. On this basis, the controller 130 can rely on the principle of electromagnetic induction to achieve non-contact electrical connection with the rotor 111, and transfer energy through changes in the electromagnetic field. Specifically, the controller 130 can adjust the current of the electromagnet in the magnetic bearing so that the magnetic bearing controls the suspension of the rotor 111 based on the magnetic force and has no contact with the stator. Similarly, by adjusting the current of the electromagnet in the stator, the stator controls the suspension of the rotor 111 based on the magnetic force and drives its movement. In other embodiments, the controller 130 can also directly make adaptive adjustments to the current of the electromagnet in the rotor 111, which will not be elaborated here.

[0043] Specifically, compared with the method of directly feeding back the signal collected by the position sensor (i.e., the initial voltage signal) to the controller 130 in the related scheme, the embodiment of the present disclosure uses the signal processing component 120 to process the initial voltage signal for the position of the rotor 111 after the position sensor 140 collects the initial voltage signal, generates a target voltage signal and feeds it back to the controller 130, thereby increasing the processing flow of the initial voltage signal, thereby improving the processing accuracy of the initial voltage signal, and ensuring that the rotor position detection has a high accuracy. On this basis, the controller 130 can drive the rotor 111 to move precisely based on the target voltage signal, including: making the rotor 111 move accurately to the set position.

[0044] Exemplarily, the number of position sensors 140 may be multiple, for example, four position sensors 140 are arranged around the front end and rear end of the rotor in a contactless manner to respectively sense the position of the front end of the rotor and the position of the rear end of the rotor. There is no limitation on the number of position sensors 140.

[0045] The motor control system provided by the embodiment of the present disclosure includes: a motor 110, a signal processing component 120, a controller 130 and a position sensor 140; the motor 110 includes a rotor 111; the output end of the rotor 111 is connected to the input end of the controller 130 through the position sensor 140 and the signal processing component 120 in sequence, and the output end of the controller 130 is connected to the input end of the rotor 111; the position sensor 140 is used to collect the initial voltage signal for the position of the rotor 111; the signal processing component 120 is used to process the initial voltage signal to generate a target voltage signal; the controller 130 is used to drive the rotor 111 to move based on the target voltage signal. In this way, after the position sensor 140 collects the initial voltage signal for the position of the rotor 111, the initial voltage signal is processed by using the signal processing component 120 to generate a target voltage signal, thereby improving the processing accuracy of the initial voltage signal, thereby improving the accuracy of the rotor position detection.

[0046] In some embodiments, Figure 2 A schematic diagram of another motor control system provided by an embodiment of the present disclosure, in which Figure 1 Based on Figure 2 The signal processing component 120 includes: a waveform shaping element 121, a waveform generating element 122 and a comparator 123; the waveform shaping element 121 and the waveform generating element 122 are respectively connected to the comparator 123; the waveform shaping element 121 is used to shape the initial voltage signal into a sinusoidal wave signal; the waveform generating element 122 is used to generate a reference waveform signal; the comparator 123 is used to perform waveform comparison between the sinusoidal wave signal and the reference waveform signal.

[0047] Exemplarily, the waveform shaping element 121 may be a Schmitt trigger, a multivibrator, a sine wave generator or other types of elements with the above-mentioned waveform shaping function. It only needs to shape the waveform of the initial voltage signal into a sine wave. The type of the waveform shaping element 121 is not limited here.

[0048] Exemplarily, the waveform of the reference waveform signal includes but is not limited to a sine wave, a square wave, etc. The waveform generating element 122 may be a sine wave generator, a square wave generator, a triangle wave generator or other element that can generate a reference waveform signal. The type of the waveform generating element 122 may be selected according to the signal processing requirements of the embodiment of the present disclosure and is not limited here.

[0049] Specifically, the waveform shaping element 121 and the waveform generating element 122 respectively send the sine wave signal and the reference waveform signal to the comparator 123, and the comparator 123 receives the sine wave signal and the reference waveform signal, compares the waveforms of the two and outputs the comparison result, for example: if the waveform of the sine wave signal is above the waveform of the reference waveform signal, the comparator 123 outputs a high level, and vice versa, if the waveform of the sine wave signal is below the waveform of the reference waveform signal, the comparator 123 outputs a low level. Exemplarily, the comparator 123 can be a single limit comparator, a hysteresis comparator or other comparator with a waveform comparison function, which is not limited here.

[0050] In some embodiments, Figure 1 Based on this, continue to refer to Figure 2 The signal processing component 120 also includes: a rectifier 124; the rectifier 124 is connected to the comparator 123; the rectifier 124 is used to rectify the sine wave signal after waveform comparison into a DC voltage signal.

[0051] It can be understood that the sinusoidal wave signal that has not been rectified by the rectifier 124 can be regarded as an AC voltage signal, and the DC voltage signal output by the rectifier 124 is a stable linearly changing signal, wherein the linearly changing signal specifically refers to a signal in which there is a linear proportional relationship between the signal amplitude and the rotor position (referred to as the rotor position).

[0052] By using the rectifier 124 to rectify the sinusoidal wave signal after waveform comparison, a stable linear change signal is output, which is convenient for the subsequent controller 130 to directly read the value of the DC voltage signal and calculate the corresponding rotor position based on the value of the DC voltage signal without the need for complex nonlinear conversion. This simplifies the execution logic of the controller 130 and improves the response speed of the controller 130. At the same time, the error of the linear change signal is small, which can provide more accurate feedback information, helping the controller 130 to more accurately adjust the current of the electromagnet, thereby achieving precise control of the rotor position.

[0053] Exemplarily, the rectifier 124 may perform half-wave rectification or full-wave rectification on the sine wave signal after the waveform comparison, and the rectification method is not limited herein.

[0054] In some embodiments, Figure 1 Based on this, continue to refer to Figure 2 The signal processing component 120 further includes: an amplifier element 125; the amplifier element 125 is connected to the rectifier 124; the amplifier element 125 is used to amplify the DC voltage signal to obtain a target voltage signal.

[0055] Specifically, by utilizing the amplifier element 125 to amplify the DC voltage signal to obtain a target voltage signal, the signal strength of the DC voltage signal is enhanced and the signal-to-noise ratio is improved, so that the subsequent controller 130 can accurately read the feedback information provided by the target voltage signal, such as the amplitude of the target voltage signal, thereby reducing information reading errors and helping to improve the accuracy of rotor position detection.

[0056] Exemplarily, the amplifying element 125 may be a transistor, an operational amplifier, a transformer, etc., and the type of the amplifying element 125 is not limited herein.

[0057] In some embodiments, Figure 1 Based on this, continue to refer to Figure 2 The signal processing component 120 also includes: a clock source 126; the output end of the clock source 126 is connected to the input end of the waveform shaping element 121.

[0058] The clock source 126 is a structure for generating a periodic signal to provide a stable clock. Specifically, the periodic signal generated by the clock source 126 can be regarded as a reference clock signal, which provides a synchronous time reference for the entire signal processing component 120, ensures that related devices work in coordination according to the set timing, and thus helps to improve the processing speed of the signal processing component 120 and optimize the performance of the motor control system.

[0059] Exemplarily, the clock source 126 may be a crystal oscillator, a ceramic oscillator, an RC oscillator, or other structures that can provide a stable clock, and the type of the clock source 126 is not limited herein.

[0060] In some embodiments, Figure 1 Based on this, continue to refer to Figure 2 The motor control system further includes a power supply component 150 ; the power supply component 150 is connected to the signal processing component 120 and the controller 130 .

[0061] The power supply component 150 is used to supply power to the signal processing component 120 and the controller 130. By way of example, the functions performed by the power supply component 150 include but are not limited to: voltage conversion, filtering, power protection, etc. The specific structure of the power supply component 150 is described in detail below.

[0062] In some embodiments, Figure 3 A schematic diagram of a power supply assembly provided in an embodiment of the present disclosure, referring to Figure 3 , the power supply component 150 includes a voltage conversion element 151.

[0063] The voltage conversion element 151 is at least used to convert the value of the input voltage into the required voltage values ​​of various magnitudes. Figure 3 For example, the figure shows that the voltage conversion element 151 includes an electrically connected AC-DC converter (i.e., AC-DC converter) 1511 and a DC-DC converter (i.e., DC-DC converter) 1512; in actual applications, the AC-DC converter 1511 can receive an AC mains voltage input from the outside, convert the mains voltage into a DC voltage and step down the voltage, for example: converting a 220V mains voltage into a ±9V DC voltage, and converting a 220V mains voltage into a ±15V DC voltage, and then the DC-DC converter 1512 adjusts the size of the above DC voltage to obtain a DC voltage of the required size, for example: converting a 9V DC voltage into a 5V DC voltage, or converting a 9V DC voltage into a 4V DC voltage, which is not limited here.

[0064] In this way, by providing the voltage conversion element 151, the voltage usage requirements of the power-consuming structures such as the signal processing components and the controller can be met, so as to support the normal operation of the signal processing components and the controller.

[0065] In some embodiments, continue to refer to Figure 3 The power supply assembly 150 also includes a power supply protection element 152 .

[0066] Among them, the power protection element 152 is used to provide power protection functions such as overvoltage protection, undervoltage protection, overcurrent protection, and short circuit protection. For example, when the power protection element 152 detects that the output (or input) voltage is too high, it will immediately cut off the line to prevent the high voltage from damaging the signal processing component, thereby achieving overvoltage protection; when the power protection element 152 detects that the output (or input) voltage is too low, it will immediately cut off the line to prevent the signal processing component from operating at a low voltage and experiencing performance degradation or data loss, thereby achieving undervoltage protection; when the power protection element 152 detects that the output (or input) current is too high, it will immediately cut off the line to prevent the current from damaging the signal processing component, thereby achieving overcurrent protection; when the power protection element 152 detects that a short circuit occurs in the power component 150, the power protection element 152 will immediately cut off the line to prevent the short circuit from causing damage to the relevant line.

[0067] In this way, by providing the power protection element 152, the power safety of the signal processing component and the controller can be further guaranteed, the working stability of the signal processing component can be improved, and the performance of the motor control system can be optimized.

[0068] In some embodiments, in combination Figure 2 and Figure 3 The motor control system further includes a voltage stabilizing component 160 ; the voltage stabilizing component 160 is connected to the signal processing component 120 and the power supply component 150 .

[0069] The voltage stabilizing component 160 is used to convert the input voltage into a stable output voltage, so that the output voltage is always kept within a set voltage range, and to suppress fluctuations, ripples, and other interference signals in the input voltage, thereby ensuring the stability and purity of the output voltage.

[0070] Exemplarily, the number of voltage stabilizing components 160 can be multiple, for example: for the power supply component 150, multiple voltage stabilizing components 160 can be respectively connected to the input end of the AC-DC converter 1511, and between the DC-DC converter 1512 and the power protection element 152, so that the AC-DC converter 1511 and the power protection element 152 have a stable input voltage; for the signal processing component 120, the voltage stabilizing component 160 can be connected to the input end of the clock source 126, so that the clock source 126 has a stable input voltage.

[0071] In this way, by providing stable voltage support for the signal processing component 120 and the power supply component 150, the working performance of both is guaranteed.

[0072] In some embodiments, Figure 4 A schematic diagram of the structure of another motor control system provided by the embodiment of the present disclosure. Figure 1 Based on Figure 4 The motor 110 further includes a housing 112 ; the signal processing component 120 , the controller 130 and the position sensor 140 are all disposed outside the housing 112 .

[0073] The housing 112 is a shell for accommodating the rotor 111 . In practical applications, the stator, the magnetic bearing and the rotor 111 are arranged together in the housing 112 .

[0074] For example, taking the case where there are multiple position sensors 140 and the rotor 111 is in a cylindrical shape, Figure 4A top view is shown of four position sensors 140 installed at the front end (or rear end) of the rotor 111. The four position sensors 140 are evenly distributed around the front end (or rear end) of the rotor 111 through the housing 112. If the reference center O is used as a reference, the angle between two adjacent position sensors 140 is 90°, so as to monitor the position changes of the front end (or rear end) of the rotor 111 in different coordinate axes such as the X-axis and Y-axis directions.

[0075] In this way, the signal processing component 120, the controller 130 and the position sensor 140 are externalized, which greatly saves the internal space of the motor 110, reduces the size of the motor, and realizes the miniaturized design of the motor 110. Moreover, the position sensor 140 will not cause any interference to the normal operation of the motor 110, and can ensure that the position sensor 140 accurately detects the rotor position without affecting the motor performance.

[0076] In addition, when the position sensor 140 is damaged, the position sensor 140 can be directly replaced for normal use, which is convenient for inspection and maintenance and reduces installation complexity.

[0077] In some embodiments, reference Figure 4 The position sensor 140 is fixed to the surface of the housing 112 through a sensor mounting seat (not shown in the figure).

[0078] For example, in the actual installation process, the sensor mounting seat can be first set at a set position on the surface of the housing 112, and then the position sensor 140 can be installed in a corresponding sensor mounting seat, and then the position sensor 140, the signal processing component 120 and the controller 130 are electrically connected. This external design has significant advantages in improving the overall performance and efficiency of the motor.

[0079] It can be understood that during the installation of the position sensor 140 , the position of the sensor mounting seat can be flexibly adjusted according to factors such as the size and shape of the housing 112 while ensuring that the accuracy and stability of the rotor position detection are not affected, and it has good applicability to various types of motors 110 .

[0080] In some embodiments, the position sensor 140 is an eddy current sensor.

[0081] Among them, the eddy current sensor has the characteristics of simple structure, high precision, high resolution, fast response and strong environmental adaptability. Specifically, by setting the eddy current sensor as the position sensor 140, it is possible to accurately detect the rotor position in real time, and quickly feed back the detected related signals to the signal processing component, thereby effectively improving the controller's control accuracy over the rotor. In addition, the eddy current sensor can still work stably in harsh environments such as high temperature, high pressure, and corrosive gas, and will not be damaged by environmental factors, meeting the application requirements in various environments and further improving the operational reliability of the motor control system.

[0082] In some embodiments, reference Figure 2 The motor control system further includes a display device 170 ; the display device 170 is connected to the controller 130 ; the display device 170 is used to display the position of the rotor.

[0083] Exemplarily, the controller 130 may perform other processing on the target voltage signal, such as calculating the rotor position based on the linear proportional relationship between the signal amplitude of the target voltage signal and the rotor position, and sending it to the display device 170 in the form of data. Thereafter, the display device 170 accurately displays the position of the rotor based on the received data related to the rotor position, thereby realizing the visualization of the rotor position.

[0084] Exemplarily, the display device 170 may be an oscilloscope, or a mobile device such as a mobile phone or a tablet computer. The type of the display device 170 may be set according to display requirements and is not limited herein.

[0085] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0086] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A motor control system, characterized in that: include: A motor, a signal processing component, a controller and a position sensor; the motor includes a rotor; The position sensor is connected to the input end of the controller through the signal processing component, and the output end of the controller is connected to the rotor; The position sensor is used to collect an initial voltage signal corresponding to the position of the rotor; the signal processing component is used to process the initial voltage signal to generate a target voltage signal; and the controller is used to drive the rotor to move based on the target voltage signal.

2. The motor control system according to claim 1, characterized in that: The signal processing components include: a waveform shaping element, a waveform generating element and a comparator; The waveform shaping element and the waveform generating element are respectively connected to the comparator; The waveform shaping element is used to shape the initial voltage signal into a sinusoidal wave signal; the waveform generating element is used to generate a reference waveform signal; and the comparator is used to perform waveform comparison between the sinusoidal wave signal and the reference waveform signal.

3. The motor control system according to claim 2, characterized in that: The signal processing component further includes: a rectifier; The rectifier is connected to the comparator; The rectifier is used to rectify the sine wave signal after waveform comparison into a DC voltage signal.

4. The motor control system according to claim 3, characterized in that: The signal processing component also includes: an amplifying element; The amplifying element is connected to the rectifier; The amplifier element is used to amplify the DC voltage signal to obtain the target voltage signal.

5. The motor control system according to claim 1, characterized in that: Also included is a power supply assembly; The power supply component is connected to the signal processing component and the controller.

6. The motor control system according to claim 5, characterized in that: The power supply assembly includes a voltage conversion element.

7. The motor control system according to claim 5, characterized in that: Also included are voltage stabilizing components; The voltage stabilizing component is connected to the signal processing component and the power supply component.

8. The motor control system according to claim 1, characterized in that: The motor also includes a housing; The signal processing component, the controller and the position sensor are all disposed outside the housing.

9. The motor control system according to claim 1, characterized in that: The position sensor is an eddy current sensor.

10. The motor control system according to claim 1, characterized in that: Also includes display equipment; The display device is connected to the controller; The display device is used to display the position of the rotor.

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