Cloud motor and cloud motor control method

Abstract

The present application provides a cloud motor and a control method for a cloud motor, and relates to the field of motors. The motor body of the cloud motor is connected to a driver via a power cord; the driver is used to send a driving instruction to the motor body; the motor body includes an induction coil wound on a stator winding, and the induction coil is used to form a transformer structure with the stator winding to generate an induced alternating current when the motor body is powered on, and transmit the induced alternating current to a controller; the controller is used to convert the induced alternating current into direct current to power the modules inside the controller; and, according to the alternating frequency of the induced alternating current, the real-time speed of the motor body is determined, and the real-time speed is transmitted to the driver; the driver is also used to correct the driving instruction according to the received real-time speed, and send the corrected driving instruction to the motor body. The cloud motor of the present application can avoid the installation clutter and data transmission interference caused by the long-distance power cord of the motor by self-generation.

Description

Technical Field

[0001] The present application relates to the field of motors, and in particular to a cloud motor and a control method for a cloud motor. Background Art

[0002] With the advancement of industry and intelligent manufacturing, traditional equipment is facing the need for intelligent upgrading. Most of the related technologies realize intelligent control of motors, such as servo motors, by setting various sensors on the equipment.

[0003] The servo motor includes a motor body, a driver and an encoder, wherein the driver is connected to the power supply through a power line and is connected to the motor body through the power line, and the encoder is connected to the driver through a power line and a data line; in addition, the inner ring of the encoder is installed on the motor shaft at the rear end of the motor, and the outer ring is fixed on the rear end cover of the motor. When the driver sends a drive command to the motor body through the power line, the motor body rotates according to the drive command, and the encoder drives the rotation of the inner ring of the encoder through the rotation of the motor shaft, and the real-time rotation data of the motor is generated, which will be fed back to the driver through the data line; the driver promptly corrects the drive command based on the data fed back by the encoder, and realizes the closed-loop control of the servo motor from the driver to the motor body, the motor body to the encoder, the encoder to the driver, and the driver to the motor body.

[0004] For the above servo motors, there is usually a certain distance between the driver and the motor body. The driver is usually installed in the power distribution room, and the encoder and other sensors are installed near the motor body. Since the power line between the driver and the motor body cannot power other structures, the encoder and other sensors have to be reconnected to a longer power line from the power distribution room or the driver, making the installation of the motor very messy, and the long power line will also interfere with the data transmission of the motor. Summary of the invention

[0005] The present application provides a cloud motor and a control method for the cloud motor, which are used to solve the technical problems of messy installation and data transmission interference caused by long-distance power lines on the motor.

[0006] In a first aspect, the present application provides a cloud motor, comprising: a motor body, a controller and a driver, wherein the motor body is connected to the driver via a power line;

[0007] The driver is used to send a driving instruction to the motor body, wherein the driving instruction is used to instruct the motor body to rotate at a preset speed;

[0008] The motor body includes an induction coil wound on a stator winding, the head and tail of the induction coil are electrically connected to the controller, and the induction coil is used to form a transformer structure with the stator winding to generate an induced alternating current when the motor body is powered by the power line, and transmit the induced alternating current to the controller;

[0009] The controller is used to convert the induced alternating current into direct current to power the modules inside the controller; and determine the real-time rotation speed of the motor body according to the alternating frequency of the induced alternating current, and transmit the real-time rotation speed to the driver;

[0010] The driver is further used to correct the driving instruction according to the received real-time rotation speed, and send the corrected driving instruction to the motor body.

[0011] In a possible implementation, the controller includes a power module, a rectifier module and an alternating frequency conversion module, the power module is electrically connected to the induction coil, and the power module is electrically connected to the rectifier module and the alternating frequency conversion module respectively;

[0012] The power supply module is used to transmit the induced alternating current to the rectification module and the alternating frequency conversion module respectively;

[0013] The rectifier module is used to convert the received induced AC current into DC power, and use the DC power to power the controller, or to power the controller and AC power equipment connected to the rectifier module;

[0014] The alternating frequency conversion module is used to determine the real-time rotation speed of the motor body according to the alternating frequency of the received induced alternating current, and transmit the real-time rotation speed to the driver to realize closed-loop control of the cloud motor.

[0015] In a possible implementation, the controller further includes a data transceiver module, the data transceiver module is electrically connected to the alternating frequency conversion module, the data transceiver module is also communicatively connected to a cloud server / host computer, and the cloud server / host computer is communicatively connected to the driver;

[0016] The alternating frequency conversion module is specifically used to transmit the real-time rotation speed to the cloud server / host computer through the data transceiver module, and the cloud server / host computer sends it to the driver.

[0017] In a possible implementation manner, the alternating frequency conversion module and the data transceiver module are also electrically connected to the rectifier module respectively, and the rectifier module is used to supply power to the alternating frequency conversion module and the data transceiver module.

[0018] In a possible implementation, the cloud motor further includes a plurality of sensors, and the plurality of sensors are also electrically connected to the rectifier module respectively, and the rectifier module is also used to supply power to the plurality of sensors respectively;

[0019] The multiple sensors are also respectively connected to the cloud server / host computer for communication, and the multiple sensors are used to upload the collected data to the cloud server / host computer.

[0020] In a possible implementation manner, the alternating frequency conversion module is also connected to the driver via a first data line, and the alternating frequency conversion module is specifically configured to transmit the real-time rotation speed to the driver via the first data line.

[0021] In a possible implementation, the controller further includes a display module, the display module is connected to the alternating frequency conversion module via a second data line, the display module is also electrically connected to the rectifier module, and the rectifier module is also used to supply power to the display module;

[0022] The display module is used to receive and display the real-time rotation speed transmitted by the alternating frequency conversion module through the second data line.

[0023] In a possible implementation manner, the motor body further includes a rotor and a stator disposed around the outer side of the rotor, the stator includes a plurality of groups of stacked silicon steel sheets, and a stator winding is wound around the outer side of each group of silicon steel sheets;

[0024] The induction coil is wound around one or more stator windings, and the wire diameter and number of turns of the induction coil are positively correlated with the current generated by the induction coil.

[0025] In a possible implementation manner, when there is one induction coil, the induction coil is wound around one stator winding;

[0026] When there are multiple induction coils, each induction coil is wound around a stator winding, and the multiple induction coils are connected in series. The number of induction coils is positively correlated with the current generated by the induction coils and does not exceed the number of the stator windings.

[0027] In a second aspect, the present application provides a control method for a cloud motor, which is applied to a controller of the cloud motor, and the method comprises:

[0028] Receiving an induced alternating current generated by an induction coil on the motor body, wherein the induced alternating current is generated by induction of a transformer structure formed by the induction coil and the stator winding when the motor body is energized through a power line;

[0029] The induced alternating current is converted into direct current to power the modules inside the controller; and the real-time rotation speed of the motor body is determined according to the alternating frequency of the induced alternating current, and the real-time rotation speed is transmitted to the driver.

[0030] The cloud motor and the control method of the cloud motor provided by the present application, the cloud motor may include: a motor body, a controller and a driver, the motor body is connected to the driver through a power line; the driver is used to send a driving instruction to the motor body, the driving instruction is used to instruct the motor body to rotate at a preset speed; the motor body includes an induction coil arranged on the stator winding, the head and tail of the induction coil are electrically connected to the controller, the induction coil is used to form a transformer structure with the stator winding when the motor body is powered on to generate an induced alternating current, and transmit the induced alternating current to the controller; the controller is used to convert the induced alternating current into direct current to power the module inside the controller; and, according to the alternating frequency of the induced alternating current, determine the real-time speed of the motor body, and transmit the real-time speed to the driver; the driver is also used to correct the driving instruction according to the received real-time speed, and send the corrected driving instruction to the motor body. The cloud motor of the present application cancels the traditional encoder structure, uses the controller to determine the real-time speed of the motor body and transmits it to the driver, so that the driver can correct the driving instruction according to the received real-time speed, and send the corrected driving instruction to the motor body to complete the closed-loop control of the motor body. Furthermore, Yun Motor has added an induction coil to the stator winding. When the motor body is powered on through the power cord, the induction coil can form a transformer structure with the stator winding to generate induced AC current. There is no need to add a stator to the motor body, nor does the motor body need to rotate. As long as the motor body is powered on, the induction coil can form a transformer structure with the stator winding to generate induced AC current, thereby powering the modules inside the controller, greatly reducing the difficulty and cost of motor self-generation. Through such a setting, the power supply problem of the controller can be solved without setting a long power cord between the controller and the driver, avoiding the problem of messy installation and data transmission interference caused by long power cords to the motor. Furthermore, the controller can also determine the real-time speed of the motor body according to the alternating frequency of the induced AC current, thereby replacing the function of the encoder and realizing accurate monitoring of the motor body, so that the driver can correct the drive command according to the real-time speed of the motor body, and realize closed-loop control from the driver to the motor body, the motor body to the controller, and the controller to the driver. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0032] Figure 1It is a structural schematic diagram of a servo motor in the prior art;

[0033] Figure 2 This is a schematic diagram of the structure of a cloud motor according to an embodiment of the present application;

[0034] Figure 3 This is a schematic diagram of the structure of a motor body according to an embodiment of the present application;

[0035] Figure 4 This is a flow chart of a method for controlling a cloud motor according to an embodiment of the present application.

[0036] Figure numerals: 1. Motor body; 101. Stator; 102. Rotor; 103. Rotor magnet; 104. Front cover; 105. Rear cover; 2. Driver; 3. Encoder; 4. Power supply; 51. First power line; 52. Second power line; 53. Third power line; 6. Data line; 7. Controller; 71. Power module; 72. Rectifier module; 73. Alternating frequency conversion module; 74. Data transceiver module; 75. Display module; 8. Power line; 9. Connecting line; 10. Host computer; 11. Sensor; 12. Stator winding; 13. Induction coil; 14. Silicon steel sheet.

[0037] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0039] It should be noted that the cloud motor and the control method of the cloud motor of the present application can be used in the motor field, and can also be used in any field other than the motor field, such as the intelligent manufacturing field, etc. The application field of the cloud motor and the control method of the cloud motor of the present application is not limited.

[0040] The cloud motor and the control method of the cloud motor of the present application can be applied to scenarios where electric motors are used to drive equipment, such as rotation, transmission, etc. Any related scenarios involving the use of electric motors to convert electrical energy into mechanical energy can apply the cloud motor and the control method of the cloud motor of the present application.

[0041] First, the terms involved in this application are explained:

[0042] Motor, the motor involved in this application, all refer to electric motors (Motor, commonly known as motors), which are a kind of equipment that converts electrical energy into mechanical energy. It uses an energized coil (that is, a stator winding) to generate a rotating magnetic field and act on the rotor (such as a squirrel cage closed aluminum frame, a squirrel cage + permanent magnet, and a permanent magnet) to form a magneto-electrical rotation torque. Electric motors are divided into DC motors and AC motors according to the power supply used. Most of the motors in the power system are AC motors, which can be synchronous motors or asynchronous motors (the speed of the motor stator magnetic field is not synchronized with the speed of the rotor). The motor is mainly composed of a stator and a rotor. The stator is the stationary part of the motor, mainly composed of three parts: the stator core, the stator winding, and the frame. The main function of the stator is to generate a rotating magnetic field; the rotor refers to the rotating part of the motor, and the rotation method is that the core in the middle of the motor is a rotating body, outputting torque. The main function of the rotor is to be cut by the magnetic lines of force in the rotating magnetic field and then generate (output) current.

[0043] The driver is the key to controlling the start, stop and operation of the motor. It changes the physical quantities such as torque, speed and position generated by the motor by changing the current size, direction and frequency of the motor winding.

[0044] The host computer is a computer that can directly issue control commands. Usually, industrial computers, workstations, touch screens, etc. can be used as host computers. The slave computer is a computer that directly controls the equipment to obtain the equipment status. It is usually a PLC, a single-chip microcomputer, etc.

[0045] Figure 1 It is a structural schematic diagram of a servo motor in the prior art, such as Figure 1 As shown, the servo motor includes a motor body 1, a driver 2 and an encoder 3, wherein the driver 2 is connected to the power supply 4 through the first power line 51, and is connected to the motor body 1 through the second power line 52, and the encoder 3 is connected to the low-voltage power supply in the driver 2 through the third power line 53; in addition, the inner ring of the encoder 3 is installed on the motor shaft at the rear end of the motor body 1, and the outer ring is fixed on the rear end cover of the motor body 1, and the encoder 3 is also connected to the driver 2 through the data line 6. When the driver 2 sends a driving instruction to the motor body 1, so that the motor body 1 rotates according to the driving instruction, the encoder 3 will drive the rotation of the encoder through the rotation of the motor to collect the actual speed of the motor body 1, and feed back the actual speed of the motor body 1 to the driver 2 through the data line 6; the driver 2 timely corrects the driving instruction according to the data fed back by the encoder 3, so as to realize the closed-loop control of the servo motor from the driver 2 to the motor body 1, the motor body 1 to the encoder 3, the encoder 3 to the driver 2, and the driver 2 to the motor body 1.

[0046] For the above servo motors, there is usually a certain distance between the driver and the motor body. The driver is generally installed in the power distribution room, and the encoder and other sensors are installed on or near the motor body. Since the power line between the driver and the motor body cannot power other structures, the encoder and other sensors have to be reconnected to a longer power line from the power distribution room or the driver, making the installation of the motor very messy, and the long power line will also interfere with the data transmission of the motor.

[0047] Based on this technical problem, the inventive concept of this application is: how to provide a cloud motor that can avoid installation clutter and data transmission interference caused by long-distance power lines.

[0048] The embodiment of the present application provides a cloud motor and a control method for the cloud motor, which uses a controller to replace the traditional encoder structure and adds an induction coil to the stator winding of the motor. When the motor body is powered by the power line, the induction coil can form a transformer structure with the stator winding to generate an induced AC current. There is no need to add a stator to the motor body, and there is no need to rotate the motor body to achieve self-generation, thereby supplying power to each module in the controller. There is no need to set a long power line for the controller, which avoids the installation clutter and data transmission interference caused by the long power line to the motor, and also reduces the difficulty and cost of the motor's self-generation. In addition, the controller can also determine the real-time speed of the motor body according to the alternating frequency of the induced AC current, so that the controller has the function of an encoder, and realizes closed-loop control from the driver to the motor body, the motor body to the controller, and the controller to the driver.

[0049] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0050] Figure 2 This is a schematic diagram of the structure of a cloud motor according to an embodiment of the present application. Figure 2 As shown, the cloud motor may include: a motor body 1 , a controller 7 and a driver 2 , and the motor body 1 is connected to the driver 2 via a power line 8 .

[0051] The driver 2 can be used to send a driving instruction to the motor body 1, and the driving instruction is used to instruct the motor body 1 to rotate at a preset speed.

[0052] The motor body 1 may include an induction coil 13 wound on the stator winding 12, and the head and tail of the induction coil 13 are electrically connected to the controller 7. The induction coil 13 can be used to form a transformer structure with the stator winding 12 to generate an induced AC current when the motor body 1 is energized through the power cord 8, and transmit the induced AC current to the controller 7.

[0053] The controller 7 can be used to convert the induced AC current into DC power to power the modules inside the controller 7; and determine the real-time rotation speed of the motor body 1 according to the alternating frequency of the induced AC current, and transmit the real-time rotation speed to the driver 2.

[0054] The driver 2 can also be used to correct the driving instruction according to the received real-time rotation speed, and send the corrected driving instruction to the motor body 1.

[0055] It should be noted that the motors mentioned in this application are all electric motors (commonly known as motors), preferably AC motors.

[0056] It should also be noted that the electrical connection mentioned in this application can be a direct electrical connection or an indirect electrical connection, and no limitation is made here.

[0057] In this embodiment, the motor body 1 mainly includes a stator 101 , a rotor 102 , a front cover 104 and a rear cover 105 . A rotor magnet 103 is attached to or inserted into the rotor 102 .

[0058] In this embodiment, the drive instruction can be sent by the driver 2 to the motor body 1 autonomously, or it can be sent by the driver 2 in response to the drive signal sent by the host computer 10. The specific sending method of the drive instruction can be set according to the model of the driver 2.

[0059] In this embodiment, the specific type of the driver 2 can be flexibly set by those skilled in the art. For example, it can be a DC driver or an AC driver, a synchronous driver or an asynchronous driver, and no limitation is made here.

[0060] In this embodiment, the driver 2 can be arranged in a power distribution room, and the controller 7 can be arranged on or near the motor body 1. The input end of the driver 2 can be connected to the power bus, and the output end is connected to the motor body 1 through the power line 8, so as to supply power to the motor body 1 and transmit the driving instruction.

[0061] In this embodiment, the head and tail of the induction coil 13 may be electrically connected to the controller 7 via two connecting wires 9 respectively. The connecting wires 9 may be conductive copper wires.

[0062] In this embodiment, the induction coil 13 can form a transformer structure with the stator winding 12 when the motor body 1 is powered on, and induce the current in the stator winding to generate an induced AC current. The way in which the induction coil 13 generates the induced AC current has nothing to do with whether the motor body rotates, so the motor body does not need to rotate. The way in which the induction coil 13 generates the induced AC current is also independent of the stator, so there is no need to add a stator to the motor body, and there is no need to make major changes to the motor body. Only the induction coil needs to be wound around the outside of the stator winding 12 to achieve self-generation of the motor, which greatly reduces the difficulty and cost of self-generation of the motor.

[0063] In this embodiment, the induced alternating current generated by the induction coil and the stator winding is generated based on the power line 8, and the voltage, current and other information of the bus power supply of the motor body can be determined based on the induced alternating current.

[0064] In this embodiment, the induced alternating current induced by the induction coil 13 and the stator winding 12 when the motor body 1 is energized is alternating current. On the one hand, the controller 7 can convert the induced alternating current into direct current, thereby powering the modules inside the controller 7. On the other hand, the real-time speed of the motor body 1 can be determined according to the alternating frequency of the induced alternating current, and the real-time speed can be transmitted to the driver 2, that is, the function of the encoder is replaced.

[0065] In this embodiment, the controller replaces the traditional encoder structure. The controller can be used to determine the real-time speed of the motor body and transmit it to the driver, so that the driver can correct the drive instruction according to the received real-time speed, and send the corrected drive instruction to the motor body to complete the closed-loop control of the motor body. Furthermore, Yun Motor also adds an induction coil to the stator winding. When the motor body is powered on by the power cord, the induction coil can form a transformer structure with the stator winding to induce an induced AC current. There is no need to add a stator to the motor body, nor is there a need for the motor body to rotate. As long as the motor body is powered on, the induction coil can form a transformer structure with the stator winding to generate an induced AC current, thereby powering the module inside the controller, greatly reducing the difficulty and cost of the motor's self-generation. Through such a setting, the power supply problem of the controller can be solved without setting a long power cord between the controller and the driver, avoiding the problem of long-distance power cords causing installation clutter and data transmission interference to the motor. Furthermore, the controller can also determine the real-time speed of the motor body according to the alternating frequency of the induced AC current, thereby replacing the function of the encoder and realizing accurate monitoring of the motor body, so that the driver can correct the drive command according to the real-time speed of the motor body, and realize closed-loop control from the driver to the motor body, the motor body to the controller, and the controller to the driver.

[0066] In a possible implementation, the controller 7 may include a power module 71, a rectifier module 72 and an alternating frequency conversion module 73, the power module 71 is electrically connected to the induction coil 13, and the power module 71 is electrically connected to the rectifier module 72 and the alternating frequency conversion module 73 respectively.

[0067] The power module 71 can be used to transmit the induced AC current to the rectification module 72 and the alternating frequency conversion module 73 respectively.

[0068] The rectifier module 72 can be used to convert the received induced AC current into DC power, and use the DC power to power the controller 7, or to power the controller 7 and AC power equipment connected to the rectifier module 72.

[0069] The alternating frequency conversion module 73 can be used to determine the real-time rotation speed of the motor body 1 according to the alternating frequency of the received induced alternating current, and transmit the real-time rotation speed to the driver 2 to realize closed-loop control of the cloud motor.

[0070] In this embodiment, the head and tail of the induction coil 13 can be electrically connected to the controller 7 through two connecting wires 9 respectively, serving as the positive and negative poles of the power input of the controller 7. The power module 71 can be the area where the two connecting wires 9 of the induction coil 13 are connected to the controller 7, and has the functions of receiving current and diverting transmission current.

[0071] In this embodiment, the rectifier module 72 is similar to a triode structure, and can rectify the input voltage-unstable induced AC current into a voltage-stable current. The specific structure of the rectifier module 72 can refer to the relevant prior art and will not be elaborated here.

[0072] In this embodiment, the AC power-consuming equipment may be AC ​​electrical appliances such as lights and fans connected to the rectifier module 72 , and no limitation is made here.

[0073] In this embodiment, the alternating frequency of the induced alternating current is constantly changing, and the alternating frequency conversion module 73 can accurately determine the real-time rotation speed of the motor body 1 according to the alternating frequency of the induced alternating current, which is better than the rotation speed detection effect of the traditional encoder.

[0074] In this embodiment, the power supply module in the controller can receive the induced alternating current transmitted by the induction coil, and transmit the induced alternating current to the rectifier module and the alternating frequency conversion module respectively; the rectifier module can rectify the unstable voltage induced alternating current into a stable voltage direct current, thereby powering each module in the controller and avoiding the need for an external long-distance power supply for the controller; the alternating frequency conversion module can accurately determine the real-time speed of the motor body according to the alternating frequency of the induced alternating current, thereby replacing the traditional encoder, and has better detection accuracy than the encoder, thereby ensuring closed-loop control of the motor.

[0075] In a possible embodiment, the controller 7 may further include a data transceiver module 74 , which is electrically connected to the alternating frequency conversion module 73 , and the data transceiver module 74 is also communicatively connected to the cloud server / host computer 10 , and the cloud server / host computer 10 is communicatively connected to the driver 2 .

[0076] The alternating frequency conversion module 73 can be specifically used to transmit the real-time rotation speed to the cloud server / host computer 10 through the data transceiver module 74, and then sent to the driver 2 by the cloud server / host computer 10.

[0077] In this embodiment, the data transceiver module 74 may be a communication module capable of data transmission, and may communicate using a network (4G, 5G, local area network, etc.). The cloud server may be a local area network cloud, such as a cloud server in a factory area.

[0078] In this embodiment, the driver can be connected to the cloud server / host computer for communication, so as to perform data exchange between the driver and the cloud server / host computer.

[0079] In this embodiment, the alternating frequency conversion module can use the data transceiver module to transmit the real-time speed of the motor to the cloud server / host computer, and the cloud server / host computer sends it to the driver. Through such a setting, it is possible to avoid setting a data line between the controller and the driver while ensuring data transmission between the controller and the driver, avoiding installation clutter and data transmission interference caused by long-distance data lines to the motor.

[0080] In a possible implementation, the alternating frequency conversion module 73 and the data transceiver module 74 may also be electrically connected to the rectifier module 72 , respectively. The rectifier module 72 may be used to supply power to the alternating frequency conversion module 73 and the data transceiver module 74 .

[0081] In this embodiment, the time required for the rectifier module to convert AC power into DC power and use DC power to power the alternating frequency conversion module is very short, usually in milliseconds, and does not affect the detection of the real-time rotation speed of the motor body by the alternating frequency conversion module when the motor body just starts to rotate.

[0082] In this embodiment, the rectifier module can use direct current to power the alternating frequency conversion module and the data transceiver module, thereby avoiding the need for an external long-distance power supply for the controller.

[0083] In one possible embodiment, the cloud motor may further include multiple sensors 11, and the multiple sensors 11 are respectively electrically connected to the rectifier module 72, and the rectifier module 72 can also be used to supply power to the multiple sensors 11 respectively; the multiple sensors 11 can also be respectively communicated with the cloud server / host computer 10, and the multiple sensors 11 can be used to upload the collected data to the cloud server / host computer 10.

[0084] In this embodiment, the sensor may be a temperature sensor, a humidity sensor, a pressure sensor or other sensors. The type and quantity of the sensors may be flexibly set by those skilled in the art and are not limited here.

[0085] In this embodiment, the rectifier module can use direct current to power multiple sensors in the cloud motor, avoiding the installation clutter and data transmission interference caused by the long-distance power lines of the sensors to the motor. In addition, multiple sensors can also be connected to the cloud server / host computer for communication, and the collected data can be transmitted through wireless communication, avoiding the installation clutter and data transmission interference caused by the long-distance data lines of the sensors to the motor.

[0086] In a possible implementation manner, the alternating frequency conversion module 73 may also be connected to the driver 2 via a first data line. The alternating frequency conversion module 73 may be specifically configured to transmit the real-time rotation speed to the driver 2 via the first data line.

[0087] In this embodiment, the alternating frequency conversion module can also transmit the real-time rotation speed to the driver through the first data line, thereby reducing the cost of data transmission.

[0088] In a possible embodiment, the controller 7 may further include a display module 75, which may be connected to the alternating frequency conversion module 73 via a second data line. The display module 75 is also electrically connected to the rectifier module 72, and the rectifier module 72 may also be used to power the display module 75; the display module 75 may be used to receive and display the real-time rotation speed transmitted by the alternating frequency conversion module 73 via the second data line.

[0089] In this embodiment, the display module 75 may include a display screen capable of displaying text information, image information, etc.

[0090] Exemplarily, the controller can be arranged on the junction box of the motor, and the display screen of the display module faces outwards. When in use, the image on the display screen can be kept facing upwards according to the installation method of the motor.

[0091] In this embodiment, the controller further includes a display module, which is used to display the real-time rotation speed of the motor for convenient viewing by relevant personnel.

[0092] In one possible implementation, Figure 3 Schematic diagram of the structure of the motor body according to an embodiment of the present application. Figure 3 As shown, the motor body 1 may further include a rotor 102 and a stator 101 disposed around the outside of the rotor 102, wherein the stator 101 includes a plurality of stacked silicon steel sheets 14, and each group of silicon steel sheets 14 is wound with a stator winding 12. The induction coil 13 is wound around one or more stator windings 12, and the wire diameter and number of turns of the induction coil 13 are positively correlated with the current generated by the induction coil 13.

[0093] In this embodiment, the motor body may include a motor housing, a stator, a rotor, a shaft, a bearing, front and rear end covers, etc. The stator may be formed by stacking silicon steel sheets, on which a group of copper wire windings, i.e., stator windings, are wound, and the rotor is also formed by stacking silicon steel sheets, with permanent magnets attached or inserted.

[0094] In this embodiment, the voltage generated by the induction coil is proportional to the motor speed and the number of motor poles; the current generated by the induction coil is proportional to the magnetic energy product of the magnet of the motor rotor, and is proportional to the wire diameter and the number of turns of the induction coil. Therefore, the wire diameter and the number of turns of the induction coil can be calculated based on the current and voltage required by the controller and the sensor.

[0095] In this embodiment, the induction coil can be wound around one or more stator windings of the motor body. When the motor body 1 is powered by the power line 8, it forms a transformer structure with the stator winding 12, and senses the current in the stator winding 12 to generate an induced electromotive force and an induced alternating current, thereby realizing self-generation. Furthermore, the current and voltage generated by the induction coil can be adjusted by adjusting the wire diameter and number of turns of the induction coil.

[0096] In a possible implementation, when there is one induction coil 13, the induction coil 13 is wound around one stator winding 12; when there are multiple induction coils 13, each induction coil 13 is wound around one stator winding 12, and the multiple induction coils 13 are connected in series, and the number of induction coils 13 is positively correlated with the current generated by the induction coil 13 and does not exceed the number of stator windings 12.

[0097] In this embodiment, an additional set of induction coils can be added to one or more stator winding coils, or multiple sets of induction coils can be added and the added induction coils can be connected in series, and then the heads and tails of the induction coils are connected to the power module of the controller through connecting wires.

[0098] It should be noted that the induction coil and the stator winding cannot be connected and need to be wound and led out separately.

[0099] In this embodiment, the number of induction coils can be calculated based on the current and voltage required by the controller and the sensor. Therefore, based on the wire diameter and number of turns of the induction coil and the slot fill rate of the stator winding, it can be determined whether the induction coil is wound on one group of stator windings or on multiple stator windings.

[0100] Preferably, the power required by the controller is usually not large, and adding a set of induction coils to a stator winding can meet the power supply demand. Of course, when the power consumption is large, a set of induction coils can be added to multiple stator windings respectively. Since the number of stator windings is fixed, the number of induction coils set thereon is also limited, that is, it cannot exceed the number of stator windings.

[0101] In this embodiment, the current and voltage generated by the induction coils can be adjusted by adjusting the number of induction coils connected in series.

[0102] Figure 4 This is a flow chart of a control method for a cloud motor according to an embodiment of the present application. This embodiment uses a controller of a cloud motor as an execution subject to illustrate the control method for the cloud motor. Figure 4 As shown, the control method of the cloud motor may include the following steps:

[0103] S401: Receive the induced alternating current generated by the induction coil on the motor body.

[0104] In this embodiment, the induced AC current may be generated by induction when the induction coil forms a transformer structure with the stator winding when the motor body is energized through the power line.

[0105] In this embodiment, the controller may include a power module, a rectifier module and an alternating frequency conversion module, the power module is electrically connected to the induction coil, and the power module is electrically connected to the rectifier module and the alternating frequency conversion module respectively.

[0106] In this embodiment, the power module of the controller can be used to receive the induced alternating current generated by the induction coil. The head and tail of the induction coil can be electrically connected to the controller through two connecting wires respectively, serving as the positive and negative poles of the controller power input. The power module can be the area where the two connecting wires of the induction coil are connected to the controller, and has the functions of receiving current and shunting transmission current.

[0107] In this embodiment, after receiving the induced alternating current generated by the induction coil, the power module can transmit the induced alternating current to the rectification module and the alternating frequency conversion module respectively.

[0108] S402: Convert the induced AC current into DC power to power the modules inside the controller.

[0109] In this embodiment, the rectifier module of the controller can be used to rectify the induced alternating current with unstable voltage into a current with stable voltage, so as to supply power to various modules inside the controller.

[0110] S403: Determine the real-time rotation speed of the motor body according to the alternating frequency of the induced AC current, and transmit the real-time rotation speed to the driver.

[0111] In this embodiment, the alternating frequency conversion module of the controller can accurately determine the real-time rotation speed of the motor body according to the alternating frequency of the induced AC current, thereby replacing the traditional encoder and having better detection accuracy than the encoder to ensure closed-loop control of the motor.

[0112] In this embodiment, the cloud motor adds an induction coil to the stator winding. When the motor body is powered on through the power line, the induction coil can form a transformer structure with the stator winding to generate an induced AC current. There is no need to add a stator to the motor body, nor is there a need for the motor body to rotate. As long as the motor body is powered on, the induction coil can form a transformer structure with the stator winding to generate an induced AC current, thereby powering the module inside the controller, greatly reducing the difficulty and cost of the motor's self-generation. Through such a setting, the power supply problem of the controller can be solved without setting a long power line between the controller and the driver, avoiding the problem of installation clutter and data transmission interference caused by the long power line to the motor. Furthermore, the controller can also determine the real-time speed of the motor body according to the alternating frequency of the induced AC current, thereby replacing the function of the encoder and realizing accurate monitoring of the motor body, so that the driver can correct the drive instruction according to the real-time speed of the motor body, and realize closed-loop control from the driver to the motor body, the motor body to the controller, and the controller to the driver.

[0113] The following is an explanation of the cloud motor application process of the present application with a specific embodiment.

[0114] In a specific embodiment, a set of dual-carbon intelligent motors is selected: the bare motor model is J5-100S-300R, the rotor core length of the motor body is 50mm, the rated speed is 300 rpm, and it is composed of a stator, a rotor, a housing, a motor shaft, front and rear end covers, bearings, a junction box and other structures. The motor stator is spliced ​​by 27 stator coil windings. Take a coil winding of the stator, and wind a copper wire with a diameter of 0.35 65 turns according to the winding direction of the stator to form an induction coil. The head and tail of the induction coil are led out and fixed in the junction box, installed on the two terminals of the junction box, and connected to the power module in the motor controller. The controller is also provided with a rectifier module, an alternating frequency conversion module, a data transceiver module and a display module. The power module is electrically connected to the rectifier module and the alternating frequency conversion module respectively, and the rectifier module is electrically connected to the alternating frequency conversion module, the data transceiver module and the display module respectively. The alternating frequency conversion module is also connected to the data transceiver module and the display module through a data line.

[0115] The motor body is equipped with a J5-100S-300R motor with an induction coil and a controller. The motor driver model is Q5-2.2R-380V, and the PLC is selected as the host computer. The power input of the driver is connected to the power bus, and the output of the driver is connected to the U, V, and W phases of the motor body with a power line. The driver is also connected to the motor body and the PLC through data lines. The PLC is also connected to the data transceiver module for communication.

[0116] When the host computer PLC sends a driving signal to the driver through the data line and uses the driver to start the motor at a certain speed, the driver generates a driving instruction according to the driving signal and sends the driving instruction to the motor body through the data line. The motor body starts to rotate at the preset speed according to the driving instruction. The induction coil wound on the stator winding of the motor body forms a transformer structure with the stator winding when the motor body is powered by the power line, and senses the current in the stator winding to generate induced AC current and induced voltage, and transmits the induced AC current to the power module of the controller through the connecting line. The power module transmits the induced AC current to the rectifier module and the alternating frequency conversion module respectively.

[0117] On the one hand, the rectifier module converts the induced AC current generated by the induction coil into DC power, and uses the DC power to power various modules and sensors of the controller.

[0118] On the other hand, the alternating frequency conversion module determines the real-time speed of the motor body according to the alternating frequency of the received induced alternating current, and transmits the real-time speed to the upper computer PLC through the wireless communication of the data transceiver module. The PLC transmits the real-time speed to the driver. The driver corrects the drive instruction according to the received real-time speed and sends the corrected drive instruction to the motor body. In addition, the alternating frequency conversion module also transmits the real-time speed to the display module through the data line, so that the display module receives and displays the real-time speed of the motor body for the convenience of relevant personnel to view.

[0119] In the above embodiments, the description of each embodiment has its own emphasis. For the part not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0120] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the appended claims.

[0121] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A cloud motor, characterized in that: include: A motor body, a controller and a driver, wherein the motor body is connected to the driver via a power line; The driver is used to send a driving instruction to the motor body, wherein the driving instruction is used to instruct the motor body to rotate at a preset speed; The motor body includes an induction coil wound on a stator winding, the head and tail of the induction coil are electrically connected to the controller, and the induction coil is used to form a transformer structure with the stator winding to generate an induced alternating current when the motor body is powered by the power line, and transmit the induced alternating current to the controller; The controller is used to convert the induced alternating current into direct current to power the modules inside the controller; and determine the real-time rotation speed of the motor body according to the alternating frequency of the induced alternating current, and transmit the real-time rotation speed to the driver; The driver is further used to correct the driving instruction according to the received real-time rotation speed, and send the corrected driving instruction to the motor body; The controller includes an alternating frequency conversion module and a data transceiver module, the data transceiver module is electrically connected to the alternating frequency conversion module, the data transceiver module is also communicatively connected to a cloud server / host computer, and the cloud server / host computer is communicatively connected to the driver; The alternating frequency conversion module is specifically used to transmit the real-time rotation speed to the cloud server / host computer through the data transceiver module, and the cloud server / host computer sends it to the driver.

2. The cloud motor according to claim 1, characterized in that: The controller further comprises a power module and a rectifier module, wherein the power module is electrically connected to the induction coil, and the power module is electrically connected to the rectifier module and the alternating frequency conversion module respectively; The power supply module is used to transmit the induced alternating current to the rectification module and the alternating frequency conversion module respectively; The rectifier module is used to convert the received induced AC current into DC power, and use the DC power to power the controller, or to power the controller and AC power equipment connected to the rectifier module; The alternating frequency conversion module is used to determine the real-time rotation speed of the motor body according to the alternating frequency of the received induced alternating current, and transmit the real-time rotation speed to the driver to realize closed-loop control of the cloud motor.

3. The cloud motor according to claim 2, characterized in that: The alternating frequency conversion module and the data transceiver module are also electrically connected to the rectifier module respectively, and the rectifier module is used to supply power to the alternating frequency conversion module and the data transceiver module.

4. The cloud motor according to claim 3, characterized in that: The cloud motor also includes a plurality of sensors, and the plurality of sensors are also electrically connected to the rectifier module respectively, and the rectifier module is also used to supply power to the plurality of sensors respectively; The multiple sensors are also respectively connected to the cloud server / host computer for communication, and the multiple sensors are used to upload the collected data to the cloud server / host computer.

5. The cloud motor according to any one of claims 2 to 4, characterized in that: The alternating frequency conversion module is also connected to the driver via a first data line. The alternating frequency conversion module is specifically used to transmit the real-time rotation speed to the driver via the first data line.

6. The cloud motor according to any one of claims 2 to 4, characterized in that: The controller further includes a display module, the display module is connected to the alternating frequency conversion module via a second data line, the display module is also electrically connected to the rectifier module, and the rectifier module is also used to supply power to the display module; The display module is used to receive and display the real-time rotation speed transmitted by the alternating frequency conversion module through the second data line.

7. The cloud motor according to any one of claims 1 to 4, characterized in that: The motor body further comprises a rotor and a stator arranged around the outer side of the rotor, wherein the stator comprises a plurality of stacked silicon steel sheets, and a stator winding is wound around the outer side of each group of silicon steel sheets; The induction coil is wound around one or more stator windings, and the wire diameter and number of turns of the induction coil are positively correlated with the current generated by the induction coil.

8. The cloud motor according to claim 7, characterized in that: When there is one induction coil, the induction coil is wound on one stator winding; When there are multiple induction coils, each induction coil is wound around a stator winding, and the multiple induction coils are connected in series. The number of induction coils is positively correlated with the current generated by the induction coils and does not exceed the number of the stator windings.

9. A method for controlling a cloud motor according to any one of claims 1 to 8, characterized in that: The controller applied to the cloud motor comprises: Receiving an induced alternating current generated by an induction coil on the motor body, wherein the induced alternating current is generated by induction of a transformer structure formed by the induction coil and the stator winding when the motor body is energized through a power line; The induced alternating current is converted into direct current to power the modules inside the controller; and the real-time rotation speed of the motor body is determined according to the alternating frequency of the induced alternating current, and the real-time rotation speed is transmitted to the driver.

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