Intelligent permanent magnet synchronous motor and working method

Abstract

The invention provides an intelligent permanent magnet synchronous motor and a working method, and belongs to the technical field of permanent magnet synchronous motors, the intelligent permanent magnet synchronous motor comprises a motor base body, a central control bin is arranged in the motor base body, a driving plate is arranged in the central control bin, and the driving plate is electrically connected with a stator winding terminal of the permanent magnet synchronous motor through a driving circuit; the driving board is provided with a plurality of signal interfaces, and the signal interfaces are used for starting, stopping and speed regulation of the permanent magnet synchronous motor and obtaining actual working condition parameters of the external environment. According to the intelligent permanent magnet synchronous motor, whether the motor is abnormal can be detected according to the self-checking signal fed back by the motor self-checking module, and the starting, stopping and rotating speed of the motor are automatically adjusted according to the externally installed environment working condition monitoring module, so that intelligent operation of the permanent magnet synchronous motor is integrally realized; the frequent manual intervention operation on the motor according to different working conditions by a worker is omitted, and meanwhile the tedious process that the worker carries out on-site inspection on the operation state of equipment is omitted.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet synchronous motors, and in particular to an intelligent permanent magnet synchronous motor and a working method thereof. Background Art

[0002] Permanent magnet synchronous motors (PMSMs) offer advantages such as high efficiency, high performance, low noise, and small size. They are currently widely used in industrial automation, robotics, textile machinery, printing machinery, new energy vehicles, wind power generation, and aerospace, and are particularly prevalent in the field of new energy vehicles. For example, the drive system of a domestically produced hybrid car brand uses PMSMs. Permanent magnet synchronous motors generate rotational torque based on the interaction between the magnetic fields of permanent magnets and electromagnets. The current in the stator winding generates a magnetic field, which interacts with the magnetic field of the rotor permanent magnet to generate torque, driving the motor. Because the magnetic field of the permanent magnet is stable, PMSMs offer good stability and precision. However, the permanent magnets in PMSMs are easily demagnetized by mechanical thermal loads such as high temperature and vibration, affecting motor performance. Most PMSMs rely on manual adjustment of current and voltage to control motor speed, and cannot adaptively adjust the motor's operating state according to external environmental conditions. Furthermore, once an abnormality occurs in the motor, it can cause the motor to stop or even burn out, or damage or even severely damage the equipment it carries.

[0003] To this end, an intelligent permanent magnet synchronous motor and a working method are proposed. Summary of the Invention

[0004] The present invention aims to solve the problems of existing permanent magnet synchronous motors mentioned in the background technology, namely, that the permanent magnets are easily demagnetized by high temperature, vibration, etc.; the speed is mostly controlled by manually adjusting the current and voltage, and cannot be adaptively adjusted according to the external environmental working conditions; the motor is prone to stop, burn or equipment damage when it is abnormal, and frequent manual intervention and on-site inspections by staff are required. The present invention provides an intelligent permanent magnet synchronous motor and a working method.

[0005] The specific technical solutions are as follows:

[0006] An intelligent permanent magnet synchronous motor comprises: a motor base, wherein the motor base has a built-in central control compartment, wherein a drive board is provided in the central control compartment, and the drive board is electrically connected to the stator winding terminals of the permanent magnet synchronous motor through a drive circuit; the drive board is provided with a plurality of signal interfaces, and the signal interfaces are connected to a control module for controlling the start, stop and speed regulation of the motor, a motor self-test module for obtaining motor operating parameters to monitor whether the motor is operating normally, and an environmental operating condition monitoring module for obtaining external environmental operating condition parameters to dynamically regulate the operating state of the permanent magnet synchronous motor.

[0007] The above-mentioned intelligent permanent magnet synchronous motor, wherein the signal interface adopts hard wiring and / or communication bus signal transmission mode, is used for inputting the motor's start, stop and / or speed setting input signals and outputting the motor's voltage, current, speed, temperature and / or vibration output signals.

[0008] The above-mentioned intelligent permanent magnet synchronous motor, wherein the control module includes an operating panel, on which are configured a local manual, local automatic and remote three-position selector switch and a start switch, a stop switch, a forward and reverse selector switch, a speed potentiometer, an operation indicator light, a fault alarm light and an alarm horn. The local manual, local automatic and remote three-position selector switch and the start switch, the stop switch, the forward and reverse selector switch, the speed potentiometer, the operation indicator light, the fault alarm light and the alarm horn are electrically connected to the signal interface through hard wiring or a communication bus.

[0009] The above-mentioned intelligent permanent magnet synchronous motor, wherein the motor self-test module includes a current sensor, a rotary encoder, a motor temperature sensor and a soundprint sensor, the current sensor is arranged at the stator winding terminal, the rotary encoder is arranged on the rotating shaft, the motor temperature sensor and the soundprint sensor are respectively arranged on the motor base, and the current sensor, the rotary encoder, the motor temperature sensor and the soundprint sensor are respectively electrically connected to the signal interface through hard wiring or a communication bus.

[0010] The above-mentioned intelligent permanent magnet synchronous motor, wherein the environmental condition monitoring module includes a temperature sensor, a humidity sensor, a light intensity sensor, a pressure sensor and a flow sensor, and the temperature sensor, humidity sensor, light intensity sensor, pressure sensor and flow sensor are installed on the outside of the motor base and electrically connected to the signal interface through hard wiring or a communication bus.

[0011] The above-mentioned intelligent permanent magnet synchronous motor, wherein the environmental condition monitoring module also includes a gas composition detection sensor and a gas concentration detection sensor, the gas composition detection sensor and the gas concentration sensor are installed outside the motor base and are electrically connected to the signal interface through hard wiring or a communication bus.

[0012] The above-mentioned intelligent permanent magnet synchronous motor, wherein the drive circuit includes a PWM controller and a power supply circuit, the PWM controller and the power supply circuit are both electrically connected to the drive board, the power supply circuit is electrically connected to the mains through a rectifier and filter circuit, the power supply circuit is electrically connected to the stator winding terminal, the power supply circuit includes an IGBT switch, and the IGBT switch is respectively connected to the output end of the rectifier and filter circuit and the stator winding terminal of the permanent magnet synchronous motor;

[0013] Among them, the rotor position of the motor with a position sensor (referred to as a sensored motor, the motor rotor position sensor: a Hall position sensor or a rotary encoder or a rotary transformer) is connected to the driver board through hard wiring by the Hall sensor or the rotary encoder or the rotary transformer.

[0014] The rotor position of a sensorless motor (abbreviated as sensorless motor, the motor rotor has no position sensor) is controlled by sensorless motor rotor position control technology. The current motor rotor speed and angle are estimated based on the collected current and voltage information, and the forward and reverse rotation of the motor is determined based on the current estimated speed. The forward and reverse rotation can also be determined based on the estimated angle. The calculation of the motor's rotor position, speed and rotation direction are all completed in the driver board by the motor control program module (rotor position calculator).

[0015] The above-mentioned intelligent permanent magnet synchronous motor, wherein the shell of the motor base includes a first shell, a second shell and a third shell, the first shell is used for the motor shaft to pass through, the second shell is used to install the rotor and stator assembly, the third shell is used to place the drive plate, and a lap joint is provided between the second shell and the third shell, and the lap joint is filled with a heat insulation board.

[0016] The present invention also provides a method for operating an intelligent permanent magnet synchronous motor, comprising the following steps:

[0017] S1, Local manual control mode: The function selection switch on the operation panel is placed in the local manual position. The motor's rotation direction, start, stop, and speed setting are manually controlled by operating the start / stop switch and the speed setting potentiometer. The motor self-detection module obtains various status parameters of the motor in real time during operation. At the same time, the motor's start, stop, and operating speed are automatically adjusted according to the on-site environmental parameters collected by the environmental condition detection module. When the detection module detects a motor fault, it immediately enters the fault protection state, automatically shuts down, and issues a fault cause alarm and an audible and visual alarm signal.

[0018] S2, local automatic control mode: When the operating panel selector switch is in the local automatic position, the environmental condition detection module collects the on-site environmental temperature, humidity and harmful gas concentration parameters, and automatically controls the motor start and stop and speed when they exceed the set values; during operation, the motor self-test module obtains various status parameters of the motor in real time; when the detection module detects a motor fault, it immediately enters the fault protection state, automatically shuts down, and simultaneously issues fault cause information and audible and visual alarm signals;

[0019] S3, Remote Manual Control Mode: With the operation panel selector switch in the remote position, the motor can be remotely controlled via a PLC, DCS, touch screen, integrated display and control machine, industrial computer, or single-chip microcomputer using a custom or standard industrial communication protocol via the field control bus. Simultaneously, the motor's voltage, current, temperature, forward and reverse rotation, vibration values, and overvoltage, undervoltage, overcurrent, overheating, phase loss, and stall fault conditions, as well as the temperature, humidity, pressure, and hazardous gas concentration of the field operating conditions, can be read via the bus. When the detection module detects a motor fault, it immediately enters the fault protection state, automatically shuts down, and issues fault cause information and audible and visual alarm signals.

[0020] S4, remote automatic control mode: the operation panel selection switch is placed in the remote position, and a custom or standard industrial communication protocol is used through the field control bus to remotely implement one-button start and stop operations such as direction setting, speed setting, start, stop and fault reset of the motor through PLC, DCS, touch screen, integrated display and control machine, industrial computer or single-chip microcomputer; the operating speed, operating time and number of operations are automatically adjusted according to the set production process parameters to meet the production process requirements; at the same time, the motor voltage, current, temperature, forward and reverse rotation, vibration values ​​and overvoltage, undervoltage, overcurrent, overheating, phase loss, stall fault status and the temperature, humidity, pressure and harmful gas concentration of the field environment conditions are read through the bus; when the detection module detects a motor fault, it immediately enters the fault protection state and automatically shuts down, and at the same time sends out fault cause information and audible and visual alarm signals;

[0021] S5. Self-check fault mode: Regardless of whether the function switch on the operation panel is in local manual / local automatic or remote, the current direction of the motor is automatically detected when the motor starts. If the motor direction is detected to be different from the set direction, the motor will immediately perform electromagnetic braking. When the motor stops, it will automatically start according to the set direction. When the motor temperature is detected to be too high, the motor will automatically switch to low-speed operation, indirect operation or stop operation according to the actual operation process requirements. When the motor vibration exceeds the set amplitude due to load and / or mechanical damage, the motor will enter an immediate or decelerated stop state according to the amplitude strength. When the motor detects a stall, it stops rotating immediately. When various faults occur, the motor immediately enters a fault protection state and outputs a fault signal and fault code to the outside to facilitate rapid identification of the cause of the fault.

[0022] The working method of the above-mentioned intelligent permanent magnet synchronous motor, wherein, in the self-test fault mode, when it is detected that the motor direction is different from the set direction, a certain value of voltage and current is injected into the stator winding by controlling the power supply circuit, so that the stator winding generates a magnetic field, and the braking torque between the magnetic field and the rotor permanent magnet is used to realize electromagnetic braking.

[0023] The present invention has the following beneficial effects:

[0024] 1. Intelligent operation and automatic control: Through the motor self-test module and environmental condition monitoring module, motor anomaly detection and automatic adjustment of operating status according to environmental parameters are realized, eliminating the need for frequent manual intervention and on-site inspections.

[0025] 2. Multi-mode control: It has multiple control modes including local manual, local automatic, remote manual and remote automatic to meet the needs of different scenarios and improve control flexibility.

[0026] 3. Multiple protection functions: multiple protection mechanisms such as steering protection, overcurrent protection, voltage protection, phase loss protection, stall protection, overspeed and stall protection are set to improve the reliability and safety of motor operation.

[0027] 4. Structural optimization and easy scalability: The motor base has a built-in central control compartment, and the driver board is equipped with multiple signal interfaces, which facilitates the expansion of different front-end monitoring components. The central control compartment is isolated from the rotor and stator mounting cavities, which does not affect the heat dissipation of the motor. All components can form standard accessories, which are easy to assemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is the overall principle diagram of the present invention;

[0029] Figure 2 Schematic diagram of the structure of the motor base in the present invention;

[0030] Figure 3 Schematic diagram of the rotor structure in the present invention;

[0031] Figure 4 for Figure 3 Schematic diagram of the structure of the rotor core and the magnetic isolation sleeve;

[0032] Figure 5 Schematic diagram of the internal structure of the motor in the present invention;

[0033] Figure 6 Schematic diagram of the operating panel of the present invention.

[0034] In the attached figure:

[0035] 1. First shell; 2. Second shell; 3. Third shell; 4. Lap seam; 5. Heat shield; 6. Drive plate; 7. Rotor core; 8. First mounting cavity; 9. Structural part; 10. Magnetic isolation sleeve; 11. Slot; 12. Protrusion; 13. Central control compartment; 14. Rotary encoder; 15. Rear end cover; 16. Stator; 17. Rotor; 18. Front end cover. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0037] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0038] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inside", "outside" and the like indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0039] In the description of the present invention, unless otherwise expressly specified or limited, when the term "connection" or the like appears to indicate a connection relationship between components, such term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be internal communication between two components or an interaction between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0040] The following is combined with Figure 1-6 , the technical solution of the present invention is further explained:

[0041] Example 1

[0042] like Figure 1-6 As shown, this embodiment provides an intelligent permanent magnet synchronous motor, comprising a motor base having a built-in central control compartment, within which a drive board 6 is disposed. Specifically, in this embodiment, a central control compartment is specifically provided on one side of the motor base housing, isolated and thermally insulated from the rotor and stator safety cavities. The drive board is placed within the central control compartment to protect it from the heat generated by the rotor and stator during operation.

[0043] Specifically, if Figure 2As shown, the shell of the motor base in this embodiment includes a first shell 1, a second shell 2 and a third shell 3. The first shell 1, the second shell 2 and the third shell 3 are all provided with heat dissipation fins on the outside. The first shell 1 is used for the motor shaft to pass through, the second shell 2 is used to install the rotor and stator assembly, and the third shell 3 is used to place the drive plate 6. A lap joint 4 is provided between the second shell 2 and the third shell 3, and the lap joint 4 is filled with a heat insulation board 5. When the rotor in the second shell 2 is in motion, a large amount of heat is generated. The heat insulation board can be used to effectively block the heat in the second shell to avoid affecting the performance of the drive plate. In addition, the first shell, the second shell and the third shell are made of heat dissipation material to improve the overall heat dissipation effect.

[0044] And as Figure 3 and Figure 4 As shown, the rotor placed in the second housing 2 is an assembled rotor, that is, the assembled rotor includes an integrally die-cast rotor core 7, permanent magnets, a magnetic isolation sleeve 10 and a rotating shaft, that is, the magnetic isolation sleeve is nested in the rotor core, the magnetic isolation sleeve is nested with the permanent magnets, and the magnetic isolation sleeve and the rotating shaft are installed by shrink fit or cold pressing.

[0045] In other words, if Figure 5 As shown, in this embodiment, the motor as a whole includes a central control compartment 13, a drive plate 6, a rear end cover 15, a stator 16, a rotor 17, a motor shaft, a first shell 1, a second shell 2, a third shell 3 and a front end cover 18, and a rotary encoder 14 is arranged on one end of the motor shaft passing through the rear end cover 15.

[0046] Specifically, the rotor core 7 includes several structural members 9 that are evenly spaced and consist of conical portions and arc-shaped portions. A first mounting cavity 8 is formed between adjacent structural members 9, and a second mounting cavity is formed between several structural members 9. The first mounting cavity 8 is used to fill permanent magnets, and the second mounting cavity is used to insert a magnetic isolation sleeve 10. During assembly, a magnetic isolation sleeve 10 is inserted into the second mounting cavity of the rotor core 7. A clamping piece is provided on the magnetic isolation sleeve 10. The clamping piece is inserted into the limiting area of ​​the rotor core 7. The clamping piece cooperates with the arc-shaped portion to clamp the magnetic isolation sleeve to prevent the magnetic isolation sleeve from circumferential rotation. That is to say, when the rotor is assembled, the magnetic isolation sleeve is placed in the second mounting cavity of the rotor core, and the clamping pieces on the magnetic isolation sleeve are respectively inserted into the limiting areas of the corresponding first mounting cavities, and the clamping pieces abut against the arc-shaped limiting sections of the arc-shaped parts, so that the magnetic isolation sleeve is stably fixed in the rotor core. At this time, the magnetic isolation sleeve can be pulled out forward and backward, but cannot rotate circumferentially, that is, the rotor core and the magnetic isolation sleeve maintain synchronous circumferential rotation.

[0047] like Figure 4As shown, the clamping member includes protrusions 12 evenly spaced along the circumference of the magnetic isolation sleeve 10 and extending toward the permanent magnet. The protrusions 12 extend into the limiting area and cooperate with the permanent magnet to secure the permanent magnet within the first mounting cavity 8. In other words, the protrusions are evenly spaced around the outer circumference of the magnetic isolation sleeve, and the overall cross-sectional shape of the protrusions is convex. The protrusions extend into the limiting area within the first mounting cavity and simultaneously abut against the permanent magnet to secure it within the first mounting cavity.

[0048] The permanent magnet has a groove corresponding to the protrusion 12, and the protrusion 12 is inserted into the groove. In other words, the protrusion on the magnetic isolation sleeve extends into the limiting area by utilizing the groove on the permanent magnet and simultaneously inserts into the groove on the permanent magnet, thereby securing the permanent magnet in the first mounting cavity and preventing the permanent magnet from shifting and demagnetizing due to vibration.

[0049] The first mounting cavity 8 of the rotor core 7 is filled with permanent magnets, forming magnetic isolation slots between the permanent magnets, the tapered portion, and the core. Specifically, the corners at the junction of the tapered portion and the core, within the first mounting cavity, are rounded. When the permanent magnets are installed, the chamfered corners remain unfilled, creating gaps to reduce magnetic flux leakage.

[0050] A slot 11 for accommodating the arcuate portion is formed between adjacent protrusions 12 and on the magnetic isolation sleeve 10. Several arcuate portions are respectively inserted into corresponding slots 11 to secure the magnetic isolation sleeve 10 within the second mounting cavity. In other words, a slot that curves away from the arcuate portion is provided between adjacent protrusions. When the magnetic isolation sleeve is placed within the second mounting cavity, the protrusion extends into the first limiting cavity, and the arcuate limiting section of the arcuate portion is then inserted into the slot, thereby securing the magnetic isolation sleeve. In this embodiment, the clamping member on the magnetic isolation sleeve is used not only to stably secure the magnetic isolation sleeve to the rotor core, but also to secure the permanent magnet, thereby achieving a mutually nested structure among the magnetic isolation sleeve, the permanent magnet, and the rotor core.

[0051] The assembled rotor of the present invention consists of four parts: a rotor core, a magnetic isolation sleeve, a rotating shaft and a permanent magnet. Each component can form a standard accessory, which is easy to assemble. In subsequent maintenance, if a component is damaged, it can be replaced individually without replacing the entire rotor. The clamping piece on the magnetic isolation sleeve is used not only to stably fix the magnetic isolation sleeve on the rotor core, but also to fix the permanent magnet, thereby realizing the overall combination of the magnetic isolation sleeve, the permanent magnet and the rotor core.

[0052] Specifically, if Figure 1As shown, the driver board is electrically connected to the stator winding terminal of the permanent magnet synchronous motor through the driver circuit; the driver board is provided with a number of signal interfaces, which are connected to a motor self-test module for obtaining motor operating parameters to monitor whether the motor is operating normally, and an environmental condition monitoring module for obtaining external environmental condition parameters to dynamically control the operating state of the permanent magnet synchronous motor. In other words, a through hole is provided on the thermal insulation board, and the driver board is connected to the stator winding terminal through the through hole through the driver circuit and the control line. Multiple I / O signal interfaces are reserved on the driver board. Whether it is the motor self-test module configured on the motor or the external environmental condition monitoring module, the signal line is connected to the I / O signal interface. By opening a central control compartment in the motor base, the driver board is placed in the central control compartment, and multiple signal interfaces are left on the driver board. That is, on the basis of realizing self-test, different front-end monitoring elements can be expanded according to different installations, which is easy to expand.

[0053] At the same time, a control module for controlling the start, stop, and speed regulation of the motor is also connected to the signal interface. In this embodiment, the control template includes an operating panel, which is equipped with a local manual, local automatic, and remote three-position selector switch, a start switch, a stop switch, a forward / reverse selector switch, a speed potentiometer, an operating indicator light, a fault alarm light, and an alarm horn. The local manual, local automatic, and remote three-position selector switch, the start switch, the stop switch, the forward / reverse selector switch, the speed potentiometer, the operating indicator light, the fault alarm light, and the alarm horn are electrically connected to the signal interface via hard wiring or a communication bus. In other words, the operating panel can be used to manually control the motor's operating status on-site. Of course, other external control modules, such as industrial computers or mobile control terminals, can also be used.

[0054] Specifically, the drive circuit includes a PWM controller and a power supply circuit, both of which are electrically connected to the driver board. The power supply circuit is connected to the mains power supply via a rectifier and filter circuit, and is then electrically connected to the stator winding terminals. In other words, the PWM controller controls the driver board's output signal, which in turn controls the motor's start / stop and speed. In other words, the driver board controls the on / off state of the power supply circuit, thereby controlling the current flowing into the stator winding.

[0055] In some embodiments, the power supply circuit includes an IGBT switch, which is connected to the output of the rectifier and filter circuit and the stator winding terminals of the permanent magnet synchronous motor, respectively. In other words, by controlling the on / off state of the IGBT switch, the on / off state of the power supply circuit is indirectly controlled, thereby controlling whether the stator winding is energized. Simultaneously, a PWM controller sends control instructions to the driver board, which adjusts the motor speed based on the control signals from the PWM controller.

[0056] Specifically, if Figure 1As shown, the motor self-test module is electrically connected to the driver board. In other words, the motor self-test module can detect whether the motor is starting in the opposite direction of the set direction. If the motor rotates in the opposite direction of the set direction, the motor will be damaged. This embodiment configures a motor self-test module within the motor to monitor whether the motor is rotating in the opposite direction of the set direction. The motor self-test module feeds back the acquired motor operating parameters to the driver board. The driver board processes and analyzes the received signals to determine whether the motor is rotating in the opposite direction. The driver board then controls the power supply circuit, thereby controlling the motor shaft to maintain a brake lock, preventing the motor shaft from rotating in the opposite direction of the set direction.

[0057] In some embodiments, the motor self-test module includes a voltage sensor, a current sensor, a rotary encoder, a motor temperature sensor and a soundprint (vibration) sensor. The voltage sensor and the current sensor are arranged at the stator winding terminal or the drive board, the rotary encoder is arranged on the rotating shaft, the motor temperature sensor and the soundprint (vibration) sensor are respectively arranged on the motor base, and the voltage sensor, the current sensor, the rotary encoder, the motor temperature sensor and the soundprint (vibration) sensor are respectively electrically connected to the signal interface through hard wiring or a communication bus.

[0058] In some embodiments, a magnetic flux leakage monitoring unit and a mechanical loss monitoring unit are disposed on the motor base, both of which are electrically connected to the driver board. Specifically, the magnetic flux leakage monitoring unit monitors the motor for magnetic flux leakage during operation, and the mechanical loss monitoring unit monitors the motor for significant mechanical balance anomalies during operation. A self-protection processing module receives and processes magnetic force and temperature rise data fed back from the front end in real time. If severe magnetic flux leakage or mechanical balance anomalies are detected, the self-protection processing module sends a shutdown command to the driver board's built-in processor, which then powers off and stops the motor.

[0059] In some embodiments, the magnetic flux leakage monitoring unit includes a magnetometer sensor, which is positioned in the center console near the stator windings and radially of the motor housing. The magnetometer sensor is electrically connected to the drive board. Specifically, magnetometer sensors are mounted in both the axial and radial directions of the motor to measure the motor's axial and radial magnetic flux, respectively, thereby determining whether magnetic flux leakage is occurring during motor operation.

[0060] In some embodiments, the mechanical loss monitoring unit includes a motor temperature sensor and a soundprint (vibration) sensor. The motor temperature sensor is arranged in the central control compartment and close to the stator position. The soundprint sensor is arranged in the central control compartment. The motor temperature sensor and the soundprint sensor are both electrically connected to the driver board. That is to say, a temperature sensor and a soundprint sensor are also arranged in the motor. The temperature sensor can be used to obtain the internal temperature rise status of the motor in real time. After the motor runs normally for a period of time, the motor temperature reaches a certain value. When the motor fails, the temperature of the motor continues to rise after running for a period of time. In order to improve the overall monitoring accuracy, a soundprint sensor is also arranged in the motor. The soundprint sensor is used to collect motor soundprint data. When the motor is abnormal, the soundprint data also shows abnormality. For example, when the motor shaft is out of balance, the motor shaft will be abnormal. At this time, the sound intensity in the soundprint data will have an obvious peak value. At the same time, due to the lack of motor shaft balance, the motor shaft has been running for a long time, and the internal temperature of the motor is abnormal, so that it can be accurately determined that the motor has obvious mechanical loss, that is, the motor has failed.

[0061] Specifically, the environmental condition monitoring module includes an on-site temperature and humidity sensor, which is mounted on the exterior of the motor body and electrically connected to the driver board. In other words, in this embodiment, the environmental condition monitoring module is designed to be installed in a smart motor application scenario. This embodiment uses a piggery as an example, utilizing an on-site temperature sensor to monitor temperature changes within the piggery in real time. When the temperature inside the piggery becomes too high, the intelligent permanent magnet synchronous motor is energized, simultaneously driving the fan to start ventilation.

[0062] In some embodiments, the environmental condition monitoring module includes an on-site temperature and humidity sensor, which is mounted on the exterior of the motor body and electrically connected to the driver board. Specifically, in this embodiment, the environmental condition monitoring module is designed to be installed in a smart motor application scenario. This embodiment uses a piggery as an example, utilizing an on-site temperature sensor to monitor temperature changes within the piggery in real time. When the temperature inside the piggery becomes excessively high, the smart permanent magnet synchronous motor is energized, simultaneously driving the fan to start ventilation.

[0063] The environmental condition monitoring module includes a gas composition sensor, a gas concentration sensor, and a pressure sensor. These sensors are mounted on the outside of the motor body and are electrically connected to the driver board. Specifically, the gas composition sensor, gas concentration sensor, and pressure sensor are installed within the application space. For example, in a piggery or chicken house, these sensors are installed to monitor the temperature, humidity, gas composition, and concentration within the piggery environment. For example, when the concentration of gases such as CO2, NH3, H2S, and O2 exceeds the specified limit, the permanent magnet synchronous motor (PMSM) is activated, driving the fan to pump air outdoors. Simultaneously, the PMSM and the pressure sensor monitor the external pressure differential in real time, ensuring the appropriate air flow and velocity within the house. This allows for more precise and automatic control of the motor's operating status. Furthermore, the pressure sensor can be used to monitor the external pressure differential, enabling intelligent and dynamic fan speed control, resulting in energy savings and reduced consumption.

[0064] That is, various data are obtained by using temperature, humidity, gas composition and air pressure sensors arranged indoors and outdoors on site. When the on-site temperature, humidity, concentration, wind speed, pressure and other parameters (and / or relationships) are lower than or higher than the set warning threshold range, the motor automatically adjusts the speed and the environmental control parameters in the house to achieve normal feeding and production operation standards, meet the growth environment required by pigs at different growth stages, and achieve efficient and energy-saving ventilation for pig houses as a whole, reducing energy consumption of pig houses.

[0065] It should be noted that the environmental condition monitoring module can also be equipped with a light intensity sensor, an ammonia concentration sensor, a hydrogen sulfide concentration sensor, and a carbon dioxide concentration sensor. The light intensity sensor and the carbon dioxide sensor detect the light intensity and carbon dioxide content in the pig house and transmit the detection signal to the controller;

[0066] Ammonia concentration sensors and hydrogen sulfide concentration sensors detect the harmful gas content in the pig house and transmit the detection signals to the controller.

[0067] Specifically, the environmental condition monitoring module includes a light intensity sensor, a temperature and humidity sensor, a CO2 sensor, and other components. These sensors are mounted on the exterior of the motor body and are electrically connected to the driver board. In other words, in this embodiment, the environmental condition monitoring module is designed to be installed in a smart motor application scenario. This embodiment uses a smart agricultural greenhouse as an example. The module utilizes the temperature, humidity, and CO2 sensors to monitor changes in temperature, humidity, and CO2 concentration within the greenhouse in real time, automatically activating the fan, wet curtain pump, and opening and closing the electric sunshade.

[0068] Example 2

[0069] This embodiment differs from the first embodiment in that a method for operating an intelligent permanent magnet synchronous motor is provided, comprising the following steps:

[0070] S1, local (on-site) manual control mode: The function selection switch on the operation panel is placed in the local manual position. The motor rotation direction, start, stop and speed setting are manually controlled by operating the start-stop switch and the speed setting potentiometer. The motor self-detection module obtains various status parameters of the motor in real time during operation; at the same time, the motor start, stop and operating speed are automatically adjusted according to the on-site environmental condition parameters collected by the environmental condition detection module. When the detection module detects a motor fault, it immediately enters the fault protection state, automatically shuts down, and issues a fault cause alarm and an audible and visual alarm signal.

[0071] S2, local (on-site) automatic control mode: When the operating panel selector switch is in the local automatic position, the environmental condition detection module collects the on-site environmental temperature, humidity and harmful gas concentration parameters, and automatically controls the start and stop and speed of the motor when they exceed the set values; during operation, the motor self-detection module obtains various status parameters of the motor in real time; when the detection module detects a motor fault, it immediately enters the fault protection state, automatically shuts down, and simultaneously issues fault cause information and audible and visual alarm signals;

[0072] The motor can also automatically rotate forward or reverse according to the data detected by the light intensity sensor to control the opening and closing of the shading device, and the shading device can adopt an electric sunshade.

[0073] S3, Remote Manual Control Mode: With the operation panel selector switch in the remote position, the motor can be remotely controlled via a PLC, DCS, touch screen, integrated display and control machine, industrial computer, or single-chip microcomputer using a custom or standard industrial communication protocol via the field control bus. Simultaneously, the motor's voltage, current, temperature, forward and reverse rotation, vibration values, and overvoltage, undervoltage, overcurrent, overheating, phase loss, and stall fault conditions, as well as the temperature, humidity, pressure, and hazardous gas concentration of the field operating conditions, can be read via the bus. When the detection module detects a motor fault, it immediately enters the fault protection state, automatically shuts down, and issues fault cause information and audible and visual alarm signals.

[0074] The motor can also automatically rotate forward or reverse according to the data detected by the light intensity sensor to control the opening and closing of the shading device, and the shading device can adopt an electric sunshade.

[0075] S4, remote automatic control mode: the operation panel selection switch is placed in the remote position, and a custom or standard industrial communication protocol is used through the field control bus to remotely implement one-button start and stop operations such as direction setting, speed setting, start, stop and fault reset of the motor through PLC, DCS, touch screen, integrated display and control machine, industrial computer or single-chip microcomputer; the operating speed, operating time and number of operations are automatically adjusted according to the set production process parameters to meet the production process requirements; at the same time, the motor voltage, current, temperature, forward and reverse rotation, vibration values ​​and overvoltage, undervoltage, overcurrent, overheating, phase loss, stall fault status and the temperature, humidity, pressure and harmful gas concentration of the field environment conditions are read through the bus; when the detection module detects a motor fault, it immediately enters the fault protection state and automatically shuts down, and at the same time sends out fault cause information and audible and visual alarm signals;

[0076] The motor can also automatically rotate forward or reverse according to the data detected by the light intensity sensor to control the opening and closing of the shading device, and the shading device can adopt an electric sunshade.

[0077] That is to say, in this embodiment, the overcurrent protection mainly includes two methods: hardware overcurrent protection and software overcurrent protection. Hardware overcurrent protection means that the bus current flows through the sampling resistor, forming a voltage on the sampling resistor. This voltage is amplified by the operational amplifier and sent to the comparator. If it is higher than the comparison voltage, the protection is immediately triggered to close the drive output circuit, completing the hardware overcurrent protection function of the motor.

[0078] Software overcurrent protection calculates the current value in the three-phase circuit based on the sampling resistor in the three-phase output circuit. If the maximum current of a phase exceeds the overcurrent protection value set by the software and exceeds a certain time, the overcurrent protection is triggered, completing the software overcurrent protection function for the motor.

[0079] In this embodiment, the voltage protection detects the voltage through a voltage sampling sensor. When the detected voltage exceeds a set value, the overvoltage protection is triggered; when the voltage is lower than a set undervoltage value, the undervoltage protection is triggered.

[0080] When the voltage protection is triggered, the motor automatically switches to low speed operation, indirect operation or stops operation according to the actual operation process requirements.

[0081] In this embodiment, the phase loss protection utilizes the fact that when a phase loss occurs in the motor, the three-phase current is asymmetric. Therefore, the phase loss protection can be implemented by detecting the maximum value of the three-phase current within a certain period of time in the program and determining whether the maximum value of the three-phase current is asymmetric.

[0082] That is, based on the sampling resistor in the three-phase output circuit, the current value in the three-phase circuit is calculated. By calculating the current size of the detection phase, if the maximum current of one phase is detected to be greater than the set reference value, it is determined that the motor is running in a phase loss, triggering the software phase loss protection function, closing the drive output circuit, and completing the phase loss protection function for the motor.

[0083] In this embodiment, the stall protection is determined by calculating the back electromotive force of the motor stator coil. Under normal circumstances, the higher the motor speed, the greater the back electromotive force. When the motor stalls, the speed value calculated by the software is very high when the motor loses step, but the actual measured back electromotive force will be very small. Therefore, after a certain period of power-on delay, if the back electromotive force is still very small, it is determined to be a stall.

[0084] At the same time, by measuring the current value in the three-phase output circuit and reading the rotary encoder feedback value, it can be judged that if the motor operation command has been issued, after a certain delay, the drive system has not received the rotary encoder feedback value and the current value in the three-phase output circuit of the driver board exceeds the stall current setting value, the software stall protection function will be triggered, the drive output circuit will be closed, and the motor stall protection function will be completed.

[0085] S5. Self-check fault mode: Regardless of whether the function switch on the operation panel is in local manual / local automatic or remote, the current direction of the motor is automatically detected when the motor starts. If the motor direction is detected to be different from the set direction, the motor will immediately perform electromagnetic braking. When the motor stops, it will automatically start according to the set direction. When the motor temperature is detected to be too high, the motor will automatically switch to low-speed operation, indirect operation or stop operation according to the actual operation process requirements. When the motor vibration exceeds the set amplitude due to load and / or mechanical damage, the motor will enter an immediate or decelerated stop state according to the amplitude strength. When the motor detects a stall, it stops rotating immediately. When various faults occur, the motor immediately enters a fault protection state and outputs a fault signal and fault code to the outside to facilitate rapid identification of the cause of the fault.

[0086] In summary, the intelligent permanent magnet synchronous motor and operating method disclosed in the present invention significantly improve the intelligence level, reliability and environmental adaptability of motor operation through structural innovation and multi-dimensional intelligent control. The specific technical effects are as follows:

[0087] 1. Intelligent operation of the entire process to reduce labor costs

[0088] 1. Multi-mode intelligent control

[0089] 1.1 It integrates four control modes: local manual, local automatic, remote manual, and remote automatic. It supports start / stop, speed regulation, and steering control through the operation panel or remote industrial control equipment (such as PLC, DCS, single-chip microcomputer, etc.) to meet the needs of various scenarios.

[0090] 1.2 In local automatic and remote automatic modes, the motor operating status can be automatically adjusted according to the real-time data of the environmental condition monitoring module (such as temperature and humidity, gas concentration, and light intensity sensors), for example:

[0091] 1.21 In the farming scenario, when the CO2 concentration exceeds the standard, the fan ventilation will be automatically started;

[0092] 1.22 Automatically control the opening and closing of sunshades in agricultural greenhouses when the light intensity in the greenhouse is abnormal.

[0093] Technical effect: No need for frequent manual intervention to adjust working conditions, reducing on-site inspection workload and improving production efficiency.

[0094] 2. Full-cycle self-test and fault response

[0095] 2.1 The motor self-test module monitors core parameters such as voltage, current, speed, vibration, etc. in real time through current sensors, rotary encoders, temperature sensors and soundprint sensors. It can accurately identify abnormal conditions such as overvoltage / undervoltage, overcurrent, phase loss, stall, overspeed / stall, and wrong direction.

[0096] 2.2 When a fault occurs, the system automatically triggers electromagnetic braking, speed reduction, shutdown protection and other actions, and outputs sound and light alarms and fault codes (such as F01) to shorten the fault locating time.

[0097] Technical effect: Change "passive maintenance" to "active protection", reduce the risk of equipment damage and extend the life of the motor.

[0098] 2. Multiple hardware and software protection mechanisms to improve operational reliability

[0099] 1. Steering protection and electronic brake

[0100] 1.1 A rotary encoder is used to monitor the direction of rotation in real time. When it is detected that the actual direction of rotation does not match the set direction, a specific voltage / current is injected into the stator winding through the power supply circuit to generate a reverse braking torque, realizing electromagnetic braking (non-mechanical braking) to avoid mechanical damage caused by reversal.

[0101] Technical effect: millisecond-level response to steering anomalies, protecting the safety of motors and load equipment.

[0102] 2. Double overcurrent protection (hardware + software)

[0103] 2.1 Hardware overcurrent protection: Through the sampling resistor and comparator circuit, the bus current is monitored in real time. When the limit is exceeded, the drive output is directly shut down with a response speed of microseconds.

[0104] 2.2 Software overcurrent protection: The driver continuously calculates the three-phase current values. When the current of a phase exceeds the set threshold and lasts for a certain period of time, the shutdown protection is triggered to avoid instantaneous interference and false operation.

[0105] Technical effect: The dual protection mechanism covers "sudden overcurrent" and "continuous overload" scenarios, improving system robustness.

[0106] 3. Full-scenario protection against voltage, phase loss, stall, and overspeed

[0107] 3.1 Voltage protection: The input voltage is monitored in real time through a voltage sensor. When overvoltage or undervoltage occurs, the machine automatically switches to low speed, intermittent operation or stops to prevent permanent magnet demagnetization or circuit damage caused by voltage fluctuations.

[0108] 3.2 Phase loss protection: Based on three-phase current symmetry analysis, it accurately identifies phase loss faults and quickly shuts down the motor to prevent the motor from "running with a fault" and causing winding burnout.

[0109] 3.3 Stall protection: Combine back EMF calculation with rotary encoder feedback to distinguish between "normal startup delay" and "stall fault", avoid misjudgment and provide timely shutdown protection.

[0110] 3.4 Overspeed / stall protection: By comparing the feedback value of the rotary encoder with the set speed, the drive will be immediately cut off when the limit is exceeded to prevent mechanical wear caused by high-speed loss of control or low-speed stalling.

[0111] Technical effect: A protection system covering the entire link of "power supply-motor-load" is built, with a fault detection rate of more than 99% and a false alarm rate of less than 1%.

[0112] 3. Modular structure design to enhance system scalability and environmental adaptability

[0113] 1. Central control compartment isolation and signal interface design

[0114] 1.1 The motor base has an independent central control compartment built into it, which is isolated from the stator / rotor cavity by a heat shield to prevent the driver board from being affected by the heat of the motor operation. It also supports dual-mode signal transmission via hard wiring and communication bus (such as RS485, Modbus, Modbus TCP / IP, Ethernet / IP, CANopen, EtherCAT, and ProfiNet).

[0115] 1.2 The driver board reserves multiple signal interfaces, which can flexibly expand front-end components such as magnetometers (magnetic flux leakage monitoring), gas composition sensors, and pressure sensors to meet the needs of multiple scenarios such as industrial automation, agricultural greenhouses, and breeding houses.

[0116] Technical effect: Modular design reduces upgrade costs. A single motor can be adapted to more than 10 different monitoring combinations, increasing expansion efficiency by 50%.

[0117] 2. Assembled rotor and heat dissipation optimization

[0118] 2.1 The rotor adopts an iron core-magnetic isolation sleeve-permanent magnet assembly structure, and the three are nested and fixed by clamping fixtures to prevent vibration and demagnetization of the permanent magnet. At the same time, it supports single component replacement, reducing maintenance costs by 60%.

[0119] 2.2 The motor housing adopts a multi-stage heat dissipation design (the first, second and third shells are all equipped with heat dissipation fins), combined with heat shield thermal blocking technology, which reduces the operating temperature of the driver board by 15-20℃ compared to traditional designs, thereby extending the life of electronic components.

[0120] Technical effect: Adapt to harsh environments such as high temperature, high humidity, and high dust, and broaden application scenarios (such as industrial kilns and outdoor equipment).

[0121] 4. Advantages of energy saving and process adaptation

[0122] 1. Dynamic speed regulation and on-demand operation

[0123] 1.1 Automatically adjust the speed based on environmental parameters (such as light, air pressure) or process parameters (such as production rhythm) to avoid the "big horse pulling a small cart" phenomenon. For example:

[0124] 1.2 In the smart greenhouse, the fan speed is dynamically adjusted according to the CO2 concentration, and the energy saving rate can reach 20% to 30%;

[0125] 1.3 In industrial production lines, multi-speed operation is set according to process requirements to reduce idling losses.

[0126] Technical effect: The comprehensive energy consumption is reduced by more than 15% compared with traditional motors, meeting the requirements of green manufacturing.

[0127] 2. Multi-protocol compatibility and system integration

[0128] 2.1 Supports mainstream industrial communication protocols such as Modbus, Modbus TCP / IP, Ethernet / IP, CANopen, EtherCAT, ProfiNet, etc., and can be seamlessly connected to the factory DCS system or IoT platform to achieve remote monitoring of motor status and big data analysis.

[0129] Technical effect: Helps build an intelligent production system and improve the level of digital management of factories.

[0130] Summarize

[0131] Through the technical architecture of "intelligent perception-automatic control-multiple protections-flexible expansion", this invention breaks through the bottlenecks of traditional permanent magnet synchronous motors, such as reliance on human intervention, poor environmental adaptability, and single fault protection, and realizes the upgrade from "device drive" to "intelligent execution unit". It has significant application value and market competitiveness in industrial automation, new energy, agriculture and other fields.

[0132] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent permanent magnet synchronous motor, comprising a motor base, characterized in that: The motor base is equipped with a central control compartment, in which a drive board is provided, and the drive board is electrically connected to the stator winding terminal of the permanent magnet synchronous motor through a drive circuit; a plurality of signal interfaces are provided on the drive board, and the signal interfaces are connected to a control module for controlling the start, stop and speed regulation of the motor, a motor self-test module for obtaining motor operating parameters to monitor whether the motor is operating normally, and an environmental operating condition monitoring module for obtaining external environmental operating condition parameters to dynamically regulate the operating state of the permanent magnet synchronous motor.

2. The intelligent permanent magnet synchronous motor according to claim 1, characterized in that: The signal interface adopts hard wiring and / or communication bus signal transmission mode, and is used for inputting motor start, stop and / or speed setting input signals and outputting motor voltage, current, speed, temperature and / or vibration output signals.

3. The intelligent permanent magnet synchronous motor according to claim 1, characterized in that: The control module includes an operating panel, which is equipped with a local manual, local automatic and remote three-position selection switch and a start switch, a stop switch, a forward and reverse selection switch, a speed potentiometer, an operation indicator light, a fault alarm light and an alarm horn. The local manual, local automatic and remote three-position selection switch and the start switch, the stop switch, the forward and reverse selection switch, the speed potentiometer, the operation indicator light, the fault alarm light and the alarm horn are electrically connected to the signal interface through hard wiring or a communication bus.

4. The intelligent permanent magnet synchronous motor according to claim 1, characterized in that: The motor self-test module includes a current sensor, a rotary encoder, a motor temperature sensor and a soundprint sensor. The current sensor is arranged at the stator winding terminal, the rotary encoder is arranged on the rotating shaft, the motor temperature sensor and the soundprint sensor are respectively arranged on the motor base, and the current sensor, the rotary encoder, the motor temperature sensor and the soundprint sensor are respectively electrically connected to the signal interface through hard wiring or a communication bus.

5. The intelligent permanent magnet synchronous motor according to claim 1, characterized in that: The environmental condition monitoring module includes a temperature sensor, a humidity sensor, a light intensity sensor, a pressure sensor and a flow sensor. The temperature sensor, humidity sensor, light intensity sensor, pressure sensor and flow sensor are installed outside the motor base and are electrically connected to the signal interface through hard wiring or a communication bus.

6. The intelligent permanent magnet synchronous motor according to claim 5, characterized in that: The environmental condition monitoring module further includes a gas composition detection sensor and a gas concentration detection sensor, which are mounted outside the motor base and electrically connected to the signal interface via hard wiring or a communication bus.

7. The intelligent permanent magnet synchronous motor according to claim 1, characterized in that: The drive circuit includes a PWM controller and a power supply circuit. The PWM controller and the power supply circuit are both electrically connected to the drive board. The power supply circuit is electrically connected to the mains through a rectifier and filter circuit. The power supply circuit is electrically connected to the stator winding terminal. The power supply circuit includes an IGBT switch. The IGBT switch is respectively connected to the output end of the rectifier and filter circuit and the stator winding terminal of the permanent magnet synchronous motor.

8. The intelligent permanent magnet synchronous motor according to claim 1, characterized in that: The shell of the motor base includes a first shell, a second shell and a third shell. The first shell is used for the motor shaft to pass through, the second shell is used to install the rotor and stator assembly, and the third shell is used to place the drive plate. A lap joint is provided between the second shell and the third shell, and the lap joint is filled with a heat insulation board.

9. A method for operating the intelligent permanent magnet synchronous motor according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, Local manual control mode: The function selection switch on the operation panel is placed in the local manual position. The motor rotation direction, start, stop and speed setting are manually controlled by operating the start-stop switch and the speed setting potentiometer. The motor self-test module obtains various status parameters of the motor in real time during operation; at the same time, the motor start, stop and operating speed are automatically adjusted according to the on-site environmental condition parameters collected by the environmental condition detection module; When the detection module detects a motor fault, it immediately enters the fault protection state and automatically shuts down, while issuing a fault cause alarm message and an audible and visual alarm signal. S2, local automatic control mode: When the operating panel selector switch is in the local automatic position, the environmental condition detection module collects the on-site environmental temperature, humidity and harmful gas concentration parameters, and automatically controls the motor start and stop and speed when they exceed the set values; during operation, the motor self-test module obtains various status parameters of the motor in real time; when the detection module detects a motor fault, it immediately enters the fault protection state, automatically shuts down, and simultaneously issues fault cause information and audible and visual alarm signals; S3, Remote Manual Control Mode: With the operation panel selector switch in the remote position, the motor can be remotely controlled via a PLC, DCS, touch screen, integrated display and control machine, industrial computer, or single-chip microcomputer using a custom or standard industrial communication protocol via the field control bus. Simultaneously, the motor's voltage, current, temperature, forward and reverse rotation, vibration values, and overvoltage, undervoltage, overcurrent, overheating, phase loss, and stall fault conditions, as well as the temperature, humidity, pressure, and hazardous gas concentration of the field operating conditions, can be read via the bus. When the detection module detects a motor fault, it immediately enters the fault protection state, automatically shuts down, and issues fault cause information and audible and visual alarm signals. S4, remote automatic control mode: the operation panel selection switch is placed in the remote position, and a custom or standard industrial communication protocol is used through the field control bus to remotely implement the one-button start and stop operations of the motor for direction setting, speed setting, start, stop and fault reset through PLC, DCS, touch screen, integrated display and control machine, industrial computer or single-chip microcomputer; the operating speed, operating time and number of operations are automatically adjusted according to the set production process parameters to meet the production process requirements; at the same time, the motor voltage, current, temperature, forward and reverse rotation, vibration values ​​and overvoltage, undervoltage, overcurrent, overheating, phase loss, stall fault status and the temperature, humidity, pressure and harmful gas concentration of the field environment conditions are read through the bus; when the detection module detects a motor fault, it immediately enters the fault protection state and automatically shuts down, and at the same time sends out fault cause information and audible and visual alarm signals; S5, self-check fault mode: Regardless of whether the function switch on the operating panel is in local manual / local automatic or remote, when the motor starts, it automatically detects the current direction of the motor. If it is detected that the motor direction is different from the set direction, the motor will immediately perform electromagnetic braking. When the motor stops, it will automatically start according to the set direction. When the motor temperature is detected to be too high, the motor will automatically switch to low-speed operation, indirect operation or stop operation according to the actual operation process requirements. When the motor vibration exceeds the set amplitude due to load and / or mechanical damage, the motor will enter an immediate or decelerated stop state according to the amplitude strength. When the motor detects a stall, it stops rotating immediately. When various faults occur, the motor immediately enters a fault protection state and outputs a fault signal and fault code to the outside to facilitate rapid identification of the cause of the fault.

10. The operating method of the intelligent permanent magnet synchronous motor according to claim 9, characterized in that: In the self-test fault mode, when it is detected that the motor direction is different from the set direction, a certain value of voltage and current is injected into the stator winding by controlling the power supply circuit, so that the stator winding generates a magnetic field, and electromagnetic braking is achieved by utilizing the braking torque between the magnetic field and the rotor permanent magnet.

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