Motor closed-loop control method

Abstract

The invention provides a motor closed-loop control method, which comprises the following steps of: configuring a motor control signal, and obtaining a feedback signal of a motor after the motor works; and performing superposition calculation on the motor control signal and the feedback signal, and generating a motor control instruction by using the signal intensity obtained after superposition calculation. Closed-loop control is carried out on the motor through a pure circuit design scheme, so that the design complexity is reduced, and an independent bottom layer control algorithm is not needed; therefore, the input cost and time of research and development and production of an independent sensor and a control algorithm are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of motor control, and in particular to a motor closed-loop control method. Background Art

[0002] Motors are an indispensable part of modern industry and life. Whether it is power tools, electric vehicles or industrial robots, they all rely on motor drives. The motor control system can be divided into two types: open-loop and closed-loop, depending on whether there is a feedback signal. These two systems each have their own characteristics and application scenarios.

[0003] At present, the open-loop control system is the simplest form of motor control system. It has no feedback link, and the input signal directly controls the operation of the motor through the controller; its system is generally composed of a controller, a driver, and a motor. The advantages of this system are simple structure and low cost, but its disadvantages are also obvious, that is, it is impossible to correct the system error, and the accuracy and stability of the motor operation are relatively poor. Open-loop control systems are mainly used in occasions where precision requirements are not high, such as electric fans, washing machines and other household appliances.

[0004] The closed-loop control system feeds back the motor's output signal to the controller through the feedback link. The controller compares the feedback signal with the set value, calculates the error, and then adjusts the input signal to make the motor's output as close to the set value as possible. The system generally consists of a controller, driver, motor, encoder, etc. The closed-loop control system can effectively reduce errors and improve the motor's operating accuracy and stability.

[0005] In the existing closed-loop control system, it is necessary to separately add a microprocessor (MCU) in the circuit control system to realize the closed-loop control of the motor by programming the microprocessor (MCU); for example, the published Chinese patent 201821661104.7 proposes a motor drive circuit, including a stepper motor, a DC voltage output component, a drive component, an external signal input circuit and a control component and a current detection circuit, wherein the drive component and the external signal input circuit are both electrically connected to the stepper motor, the external signal input circuit outputs a state signal of the stepper motor, and the control component The component receives the status signal and controls the driving component; the external signal input circuit includes an input port, a processing circuit coupled to the input port, a processing chip coupled to the processing circuit, and an output circuit coupled to the output end of the processing chip U15, the output circuit is coupled to the control component, and the control component controls the operation of the driving component; the driving component controls the operation of the stepper motor, the current detection circuit receives the output current of the driving component and then outputs a current sampling signal, and the control component receives the current sampling signal; the DC voltage output component supplies power to the driving component and the control component.

[0006] In the above scheme, the processing chip processes and outputs the control signal to realize the control of the working state of the stepper motor; if a microprocessor (MCU) is added separately, it is necessary to design the underlying control algorithm separately, which will lead to a higher complexity of the design and require additional sensors and control algorithms, and the cost is relatively high. Summary of the invention

[0007] The present invention provides a motor closed-loop control method for closed-loop control of the motor through a pure circuit design, thereby reducing the complexity of the design and not requiring a separate underlying control algorithm; thereby reducing the investment cost of the research and development and production of separate sensors and control algorithms.

[0008] The present invention provides a motor closed-loop control method, comprising:

[0009] Configure the motor control signal,

[0010] When the motor is working, the feedback signal of the motor is obtained;

[0011] The motor control signal and feedback signal are superimposed and calculated.

[0012] The signal strength obtained after superposition calculation is used to generate motor control instructions.

[0013] Preferably, when the voltage data of the feedback signal is larger, the signal after superimposition calculation is weakened; when the voltage data of the feedback signal is smaller, the signal after superimposition calculation is increased.

[0014] Preferably, configuring the motor control signal includes: inputting a positive voltage fixed duty cycle signal Duty1 to generate a motor control signal for driving and controlling the corresponding motor, wherein the motor control signal is a voltage signal POWER1.

[0015] Preferably, when the motor is working, obtaining a feedback signal of the motor includes:

[0016] After the motor is driven, a negative pressure feedback signal is output, and the feedback signal is feedback signal Duty2; wherein, the voltage of the negative pressure signal is related to the output power of the motor, and the greater the motor output power, the greater the negative pressure feedback signal; otherwise, the smaller it is.

[0017] Preferably, performing superposition calculation on the motor control signal and the feedback signal includes:

[0018] The negative pressure feedback signal Duty2 is added to the input positive pressure signal Duty1. If the negative pressure feedback signal Duty2 is larger, the superimposed signal will be weakened after adding it to the input positive pressure signal Duty1, thereby reducing the voltage signal POWER1 of the drive control corresponding motor to achieve closed-loop control.

[0019] Preferably, it also includes: if the negative pressure feedback signal Duty2 is smaller, it will be added to the input positive pressure signal Duty1, and the superimposed signal will be enhanced, so that the voltage signal POWER1 of the drive control corresponding motor is increased to achieve closed-loop control.

[0020] Preferably, it includes: using a control circuit to perform closed-loop control of the motor;

[0021] It includes: obtaining a motor control signal of the motor through a CNP105-3 port in a plug-in terminal CNP105;

[0022] The feedback signal of the motor is obtained through circuit one; the motor control signal and the feedback signal are superimposed and calculated through circuit two, and the motor control instruction is output.

[0023] Preferably, circuit one comprises:

[0024] An operational amplifier U11A, wherein the pin 3 of the operational amplifier U11A is connected to a resistor R107, and the other end of the resistor R107 is grounded; the pin 2 is connected to a resistor R106, and the two ends of the resistor R106 are respectively connected in parallel to a resistor R105 and a resistor R108, and the other end of the resistor R108 is grounded, and the other end of the resistor R105 is connected in parallel to the pin 1 of the operational amplifier U11A, and a negative voltage signal TP101 is output;

[0025] Circuit 2 includes:

[0026] An operational amplifier U11 B, wherein the operational amplifier U11 B performs an operational amplifier half-wave rectification on the negative voltage signal TP101 and outputs a DC voltage signal TP102;

[0027] The DC voltage signal TP102 is amplified by transistors Q107 and Q106 to form a DC amplified signal TP103;

[0028] Circuit three includes:

[0029] Optocoupler isolator LPP101, the input end of the optocoupler isolator LPP101 is used to receive the DC amplified signal TP103, the output end of the optocoupler isolator LPP101 is connected to the input end of the thyristor Q111; the thyristor Q111 is used to change the output voltage of the plug terminal CNP101, and the plug terminal CNP101 is connected to the motor.

[0030] Preferably, port Feedback1 of connector CNP105 is the signal connection port of the voltage feedback signal of connector CNP101. The higher the driving voltage of connector CNP101, the higher the voltage value of port Feedback1. Port Feedback1 is superimposed with the negative voltage signal TP101, and after superposition, a closed-loop DC voltage signal TP102 is formed, which circulates back and forth to form a closed-loop control of motor power.

[0031] Preferably, the voltage of the DC amplified signal TP103 is used to change the conduction time of the thyristor Q111, thereby changing the output voltage of the plug terminal CNP101.

[0032] The working principle and beneficial effects of the present invention are as follows:

[0033] The present invention provides a motor closed-loop control method, including: configuring a motor control signal, obtaining a feedback signal of the motor when the motor is working; performing superposition calculation on the motor control signal and the feedback signal, and generating a motor control instruction using the signal strength obtained after the superposition calculation. The present invention is used to perform closed-loop control on the motor through a pure circuit design scheme, thereby reducing the complexity of the design and not requiring a separate underlying control algorithm; thereby reducing the investment cost of the research and development and production of separate sensors and control algorithms.

[0034] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0035] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0037] Figure 1 It is a control flow diagram of the present invention;

[0038] Figure 2a It is a circuit diagram of an operational amplifier U11A of the circuit 1 of the present invention;

[0039] Figure 2b It is a circuit diagram of the operational amplifier U11 B of the circuit 2 of the present invention;

[0040] Figure 2c It is a circuit diagram of a DC amplified signal TP103 of the second circuit of the present invention;

[0041] Figure 3a It is a schematic diagram of the output end of the optocoupler isolator LPP101 circuit of circuit 3 of the present invention;

[0042] Figure 3b It is a partial schematic diagram of the circuit three operational amplifier U13C of the present invention;

[0043] Figure 3c It is a schematic diagram of the circuit three operational amplifier U13B of the present invention;

[0044] Figure 4 It is a circuit diagram of the operational amplifier U13D of the present invention;

[0045] Figure 5 It is a schematic diagram of the circuit structure of the operational amplifier U13A of the present invention;

[0046] Figure 6 It is a schematic diagram of a power filter circuit of the present invention;

[0047] Figure 7 It is a schematic diagram of the connector terminal CNP105 of the present invention. DETAILED DESCRIPTION

[0048] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0049] according to Figure 1-7 As shown, an embodiment of the present invention provides a motor closed-loop control method, which is characterized by including: configuring a motor control signal, and when the motor is working, obtaining a feedback signal of the motor; superimposing the motor control signal and the feedback signal, and generating a motor control instruction using the signal strength obtained after the superimposed calculation.

[0050] The present invention is used to perform closed-loop control on the motor through a pure circuit design, thereby reducing the complexity of the design and not requiring a separate underlying control algorithm; thereby reducing the investment cost of the research and development and production of separate sensors and control algorithms.

[0051] Specifically, it also includes: when the voltage data of the feedback signal is larger, the signal after superimposed calculation is weakened; when the voltage data of the feedback signal is smaller, the signal after superimposed calculation is increased.

[0052] Configuring the motor control signal includes: inputting a positive voltage fixed duty cycle signal Duty1 to generate a motor control signal for driving and controlling the corresponding motor, wherein the motor control signal is a voltage signal POWER1.

[0053] When the motor is working, obtaining the feedback signal of the motor includes: after the motor is driven, a negative pressure feedback signal is output, and the feedback signal is feedback signal Duty2; wherein the voltage of the negative pressure signal is related to the output power of the motor, the greater the output power of the motor, the greater the negative pressure feedback signal; otherwise, the smaller it is.

[0054] The superposition calculation of the motor control signal and the feedback signal includes: adding the negative pressure feedback signal Duty2 to the input positive pressure signal Duty1. If the negative pressure feedback signal Duty2 is larger, the superposition signal will be weakened after adding it to the input positive pressure signal Duty1, thereby reducing the voltage signal POWER1 of the drive control corresponding motor to achieve closed-loop control.

[0055] Among them, if the negative pressure feedback signal Duty2 is smaller, it will be added to the input positive pressure signal Duty1, and the superimposed signal will be enhanced, so that the voltage signal POWER1 of the drive control corresponding motor is increased to achieve closed-loop control. The working principle (drive logic) of the present invention is as follows:

[0056] 1: Input a positive voltage fixed duty cycle signal Duty1 to generate a drive control corresponding motor voltage signal POWER1.

[0057] 2: After the motor rotates, the motor driver outputs a negative pressure feedback signal Duty2. The voltage of the negative pressure signal is related to the output power of the motor. The greater the motor output power, the greater the negative pressure feedback signal.

[0058] 3: Finally, the negative pressure feedback signal Duty2 is added to the input positive pressure signal Duty1. If the negative pressure feedback signal Duty2 is larger, it will be added to the input positive pressure signal Duty1, and the superimposed signal will be weakened, thereby reducing the corresponding motor voltage signal POWER1 of the drive control and realizing closed-loop control.

[0059] 4: Similarly, if the negative pressure feedback signal Duty2 is smaller, it will be added to the input positive pressure signal Duty1, and the superimposed signal will be enhanced, thereby strengthening the drive control corresponding to the increase of the motor voltage signal POWER1.

[0060] A positive duty cycle signal is input into the circuit through the above control logic, and a voltage signal for driving and controlling the motor is generated thereby; when the motor is working, the motor will output a negative feedback signal, and the positive duty cycle signal and the negative feedback signal are superimposed to generate a control command for the motor (if the signal is weakened, the motor is not driven or the driving efficiency of the motor is reduced; if the signal is enhanced, the motor is driven or the driving efficiency of the motor is increased); thereby achieving the purpose of closed-loop control of motor power or speed through a pure hardware circuit method. The scheme proposed in the present invention can realize a pure circuit closed-loop design, and realize motor closed-loop control, speed closed-loop or power closed-loop. Using a pure hardware circuit method instead of a software algorithm method improves reliability; avoiding unpredictable bugs in the development of a software closed loop. Not using an MCU (microprocessor) saves a high-cost component and achieves the purpose of cost control.

[0061] In one embodiment, as shown in FIG. 2-7, the method includes: using a control circuit to perform closed-loop control of the motor; the method includes: using CNP105-3 in the plug-in terminal CNP105 to control the motor;

[0062] The motor control signal of the motor is obtained through the port; the feedback signal of the motor is obtained through circuit one; the motor control signal and the feedback signal are superimposed and calculated through circuit two, and a motor control instruction is output.

[0063] The closed-loop control of the motor using the control circuit specifically includes:

[0064] Circuit 1,

[0065] An operational amplifier U11A, wherein the pin 3 of the operational amplifier U11A is connected to a resistor R107, and the other end of the resistor R107 is grounded; the pin 2 is connected to a resistor R106, and the two ends of the resistor R106 are respectively connected in parallel to a resistor R105 and a resistor R108, and the other end of the resistor R108 is grounded, and the other end of the resistor R105 is connected in parallel to the pin 1 of the operational amplifier U11A, and a negative voltage signal TP101 is output;

[0066] Circuit 2:

[0067] An operational amplifier U11 B, wherein the operational amplifier U11 B performs an operational amplifier half-wave rectification on the negative voltage signal TP101 and outputs a DC voltage signal TP102;

[0068] The DC voltage signal TP102 is amplified by transistors Q107 and Q106 to form a DC amplified signal TP103;

[0069] Circuit Three:

[0070] Optocoupler isolator LPP101, the input end of the optocoupler isolator LPP101 is used to receive the DC amplified signal TP103, the output end of the optocoupler isolator LPP101 is connected to the input end of the thyristor Q111; the thyristor Q111 is used to change the output voltage of the plug terminal CNP101, and the plug terminal CNP101 is connected to the motor.

[0071] Furthermore, port Feedback1 of the plug terminal CNP105 is the signal connection port of the voltage feedback signal of the plug terminal CNP101. The higher the driving voltage of the plug terminal CNP101, the higher the voltage value of the port Feedback1. Port Feedback1 is superimposed with the negative voltage signal TP101, and after superposition, a closed-loop DC voltage signal TP102 is formed, which circulates back and forth to form a closed-loop control of the motor power.

[0072] The voltage of the DC amplified signal TP103 is used to change the conduction time of the thyristor Q111, thereby changing the output voltage of the plug terminal CNP101.

[0073] In the present invention, compared with the traditional method of realizing motor closed-loop control by writing program algorithms of MCU (programmable controller), the purpose of realizing motor closed-loop control by pure hardware circuit method can be achieved, and the following technical effects are achieved: using pure circuit closed-loop design, unpredictable bugs in the development of software closed-loop can be avoided; the present invention has cost advantages, does not use MCU (microprocessor), and saves a high-cost component; the circuit control principle proposed by the present invention is as follows:

[0074] 1: Input a positive voltage fixed duty cycle signal CNP105-3, and generate a negative voltage signal TP101 through the U11A op amp.

[0075] 2: After half-wave rectification by the U11 B op amp, the voltage signal TP101 becomes a DC voltage signal TP102.

[0076] 3: TP102 signal current is weak, the drive is weak, it needs to be amplified by Q107 and Q106 transistors to become a DC signal TP103

[0077] 4: TP103 directly drives the optocoupler isolator LPP101. The voltage of TP103 can change the conduction time of the thyristor Q111, thereby changing the voltage of CNP101. The CNP101 terminal is connected to the motor.

[0078] 5: Port Feedback1 is the signal of motor CNP101 voltage feedback. The higher the CNP101 driving voltage, the higher the port Feedback1 voltage value. Feedback1 is directly superimposed on TP101 to form a closed-loop TP102. This cycle is repeated to achieve a motor power closed-loop.

[0079] In the present invention, the plug-in terminal CNP105 is used to realize the unified configuration management of signal input and output. Specifically, a positive voltage duty cycle signal is input to the port CNP105-3 of the plug-in terminal CNP105; a negative voltage signal TP101 is generated by an operational amplifier U11A in a circuit, and the negative voltage signal TP101 is rectified and filtered to form a negative DC voltage signal TP102, which is amplified by transistors Q107 and Q106 to become a negative DC amplified signal TP103; the voltage of the negative DC amplified signal TP103 is then used to directly drive the optical coupler isolator LPP101 to change the input voltage of the motor CNP101, thereby realizing the input of the motor control voltage. Port Feedback1 is a signal of the voltage feedback of the motor CNP101. The higher the driving voltage of CNP101, the higher the voltage value of the port Feedback1. Feedback1 is directly superimposed on TP101 to form a closed loop TP102 after superposition, and the cycle is repeated to realize the motor power closed loop.

[0080] In one embodiment, a circuit design method is also included, the method comprising:

[0081] Get the motor type and determine the circuit layout based on the motor type.

[0082] Use the circuit layout plan to design the PCB layout.

[0083] When the motor is a fan motor, when the circuit is laid out, the layout position of the connector terminal CNP105 is located at the edge of the PCB board, and the edge is determined in combination with the installation position of the fan motor. When the fan motor is located at the left edge of the PCB board, the design position of the connector terminal CNP15 is located at the right edge of the PCB board. By using this layout method, the impact on the motor's working efficiency caused by electromagnetic interference during actual use and the problem of excessive product noise caused by electromagnetic interference can be greatly reduced.

[0084] Furthermore, when the motor is a washing machine motor, when the circuit is laid out, the layout position of the connector terminal CNP105 is located on the back of the circuit board, and the operational amplifier device is located on the front of the circuit board. When the circuit board is installed, the connector CNP105 on the back can facilitate its quick disassembly and assembly (the back of the PCB board faces the back of the refrigerator during installation), and facilitate its maintenance or repair during subsequent use.

[0085] It also includes: performing layout design based on the schematic diagram of the circuit board; performing simulation based on the layout design;

[0086] The layout design is adjusted based on the simulation results to obtain an optimized layout design drawing, and the above simulation is repeated using the optimized layout design drawing until a qualified simulation result is obtained.

[0087] In conventional circuit design, circuit simulation is performed after the layout design is completed, and then proofing is performed directly; after proofing, device welding is performed, and finally, aging test of circuit performance is performed; after completing the above steps, the structural dimensions are verified. This R&D method will cause the R&D time to be extended by at least 6 months. In the above scheme, on the basis of the existing electrical simulation test, the layout design drawing is generated into a three-dimensional model diagram at the same time. While the electrical performance simulation is performed based on the three-dimensional model diagram, the dimension verification, electromagnetic interference simulation and the overall physical performance of the product are simulated simultaneously with the structural design to reduce the R&D time. When the above simulation results are completed, proofing, device welding, and electrical performance testing are performed, and then the real machine test is directly performed, which can reduce the R&D time by at least 6 months.

[0088] Based on the above scheme, it also includes: a simulation system, which is applied to the circuit design method and used for circuit and structure simulation testing, and includes: an import port, which is used to import the circuit diagram and the product structure model diagram into the temporary storage area;

[0089] Model library, composed of circuit diagrams and product structure model diagrams, as well as pre-stored basic circuits, electronic devices and product structures, and product parts model diagrams;

[0090] The 3D model building module is used to build 3D models of circuit diagrams and electronic devices in the circuit diagrams, and generate simulated circuit boards.

[0091] The assembly module is used to guide and assist the user to assemble the simulated circuit board and the product structure model diagram to form a simulated product model;

[0092] A simulation module, used to simulate the simulation product model;

[0093] The verification module is used to verify the simulation results of the simulation product model and display the verification results.

[0094] The three-dimensional model building module is also used for an indexing area with marks and guides, and the indexing area with marks and guides is used to mark and guide the electronic device mounting area and pads of the PCB board.

[0095] The indexing area is the device area of ​​the electronic device on the circuit board (PCB board). The assembly module and the simulation module are combined to perform assembly and simulation, obtain the name and category of the electronic device in the area, match them in the model library, and display the matched electronic devices for the user to select a suitable electronic device; when one of the electronic devices is selected, the electronic device is extracted and activated, and after the user confirms, it falls on the pad in the indexing area; at this time, the simulated selection and welding of the electronic device in the indexing area are completed, and a simulated PCBA is obtained;

[0096] The simulated PCBA and the product structure model diagram are imported into the simulation module, the simulated PCBA installation area of ​​the product structure model is obtained, the assembly area of ​​the simulated PCBA is located, and the simulated PCBA and the product structure model diagram are simulated assembled to obtain a simulated product model.

[0097] The simulation module is used to simulate the simulation product model; and the verification module is used to verify the structural interference and electromagnetic interference of the simulation product model; when there is structural interference, the interference part is marked, and when there is electromagnetic interference, the intensity of the electromagnetic interference area is marked;

[0098] It also includes a modification module for modifying and adjusting the design part that generates electromagnetic interference, and obtaining a new PCB layout design solution based on the modification and adjustment.

[0099] When a simulated PCBA is obtained, an electrical simulation is performed on the simulated PCBA, and the reliability and integrity of the design are tested based on the electrical simulation. If the test result is negative, the defective parts of the simulated PCBA are marked; if the test result is positive, the defective parts of the simulated PCBA are imported.

[0100] In the above system, the working principle is: import the product structure drawing corresponding to the circuit into the simulation system, use the three-dimensional model construction module to generate a three-dimensional model of the circuit board, so that the R&D personnel can have a clear view of the circuit board design; then, use the assembly module to assemble the three-dimensional model diagram and the product structure model diagram of the above-mentioned circuit board (PCB board) to obtain a simulated product model, and then simulate and verify the simulated product model through the simulation module and the verification module, so as to obtain the final qualified PCB layout, and based on the qualified PCB layout, export the proofing file and output it.

[0101] In the present invention, during the design process of the PCB board, when it is used for a fan motor, the simulation module simulates the electrical performance, reliability and safety of the product, and also includes fluid simulation. The fluid simulation obtains the physical parameters of the motor, simulates the heating of the motor shaft and the fluid channel and fluid flow rate, performs optimal efficiency simulation on the air duct corresponding to the fan, and obtains the optimal efficiency simulation value;

[0102] Among them, the optimal efficiency simulation at least includes simulating the normal temperature state, the high temperature and high humidity state, the high temperature state, the high humidity and low temperature state, the high altitude state, and the normal pressure state, and obtaining the corresponding optimal efficiency simulation values, which include: the optimal efficiency simulation value of the normal temperature state, the optimal efficiency simulation value of the high temperature and high humidity state, the optimal efficiency simulation value of the high temperature state, the optimal efficiency simulation value of the high humidity and low temperature state, the optimal efficiency simulation value of the high altitude state, and the optimal efficiency simulation value of the normal pressure state;

[0103] Based on different application scenarios and combined with the optimal efficiency simulation value, the corresponding motor working time and motor speed adjustment solutions are generated.

[0104] For example, when the simulated environment is in a high temperature and high humidity state, a fan motor model is constructed (fan motor working environment simulation). First, the fan duct is determined, and based on the fan duct, the wind speed, wind resistance and ventilation efficiency under normal temperature and pressure environment are obtained; the temperature and humidity are adjusted in steps according to the wind speed, wind resistance and ventilation efficiency in the normal temperature and pressure environment. For example, the temperature is stepped by 5 degrees Celsius and the humidity is stepped by 5% on the basis of normal temperature and pressure, and the motor working time and speed working data within the preset time are constructed; based on the data, if the fan is a cooling fan, the optimal working time and optimal motor speed adjustment plan are obtained in combination with the wear of the motor.

[0105] The motor wear degree is obtained by simulating the motor physical parameters, or by the official wear degree (service life) of the motor manufacturer, or by industry standards or regulations.

[0106] The optimal working time and optimal motor speed adjustment scheme is: the motor stops or reduces its speed every X minutes. Alternatively, based on environmental parameters, after the motor has worked for X minutes, the speed is reduced to Y rpm, which will still continue to cool the environment or change the air, and this efficiency is equivalent to the efficiency without speed reduction.

[0107] In the above scheme, reliability simulation can be performed by simulating the working efficiency of the motor, which effectively improves the user experience of the motor during use, and combines the motor closed-loop control circuit to achieve the purpose of optimal working efficiency control of the motor; allowing users to achieve the purpose of optimal working efficiency and optimal energy consumption ratio output under limited working scenarios; at the same time, since this technical scheme is optimized in the R&D design stage, it can greatly reduce R&D costs and time.

[0108] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A motor closed-loop control method, characterized in that: include: Configure the motor control signal, When the motor is working, the feedback signal of the motor is obtained; The motor control signal and feedback signal are superimposed and calculated. The signal strength obtained after superposition calculation is used to generate motor control instructions.

2. A motor closed-loop control method as claimed in claim 1, characterized in that: When the voltage data of the feedback signal is larger, the signal after superimposition calculation is weakened; when the voltage data of the feedback signal is smaller, the signal after superimposition calculation is increased.

3. A motor closed-loop control method as claimed in claim 1, characterized in that: Configuring the motor control signal includes: inputting a positive voltage fixed duty cycle signal Duty1 to generate a motor control signal for driving and controlling the corresponding motor, wherein the motor control signal is a voltage signal POWER1.

4. A motor closed-loop control method as claimed in claim 3, characterized in that: When the motor is working, obtaining the feedback signal of the motor includes: After the motor is driven, a negative pressure feedback signal is output, and the feedback signal is feedback signal Duty2; wherein, the voltage of the negative pressure signal is related to the output power of the motor, and the greater the motor output power, the greater the negative pressure feedback signal; otherwise, the smaller it is.

5. A motor closed-loop control method as claimed in claim 3, characterized in that: The superposition calculation of the motor control signal and the feedback signal includes: The negative pressure feedback signal Duty2 is added to the input positive pressure signal Duty1. If the negative pressure feedback signal Duty2 is larger, the superimposed signal will be weakened after adding it to the input positive pressure signal Duty1, thereby reducing the voltage signal POWER1 of the drive control corresponding motor to achieve closed-loop control.

6. A motor closed-loop control method as claimed in claim 5, characterized in that: Also includes: If the negative pressure feedback signal Duty2 is smaller, it will be added to the input positive pressure signal Duty1, and the superimposed signal will be enhanced, thereby increasing the voltage signal POWER1 of the drive control corresponding motor to achieve closed-loop control.

7. A motor closed-loop control method as claimed in claim 1, characterized in that: include: Using the control circuit to perform closed-loop control of the motor; It includes: obtaining a motor control signal of the motor through a CNP105-3 port in a plug-in terminal CNP105; The feedback signal of the motor is obtained through circuit one; the motor control signal and the feedback signal are superimposed and calculated through circuit two, and the motor control instruction is output.

8. A motor closed-loop control method as claimed in claim 7, characterized in that: Circuit 1 includes: An operational amplifier U11A, wherein the pin 3 of the operational amplifier U11A is connected to a resistor R107, and the other end of the resistor R107 is grounded; the pin 2 is connected to a resistor R106, and the two ends of the resistor R106 are respectively connected in parallel to a resistor R105 and a resistor R108, and the other end of the resistor R108 is grounded, and the other end of the resistor R105 is connected in parallel to the pin 1 of the operational amplifier U11A, and a negative voltage signal TP101 is output; Circuit 2 includes: An operational amplifier U11 B, wherein the operational amplifier U11 B performs an operational amplifier half-wave rectification on the negative voltage signal TP101 and outputs a DC voltage signal TP102; The DC voltage signal TP102 is amplified by transistors Q107 and Q106 to form a DC amplified signal TP103; Circuit three includes: Optocoupler isolator LPP101, the input end of the optocoupler isolator LPP101 is used to receive the DC amplified signal TP103, the output end of the optocoupler isolator LPP101 is connected to the input end of the thyristor Q111; the thyristor Q111 is used to change the output voltage of the plug terminal CNP101, and the plug terminal CNP101 is connected to the motor.

9. A motor closed-loop control method as claimed in claim 8, characterized in that: Port Feedback1 of the plug terminal CNP105 is the signal connection port of the voltage feedback signal of the plug terminal CNP101. The higher the driving voltage of the plug terminal CNP101, the higher the voltage value of the port Feedback1. Port Feedback1 is superimposed with the negative voltage signal TP101, and after superposition, a closed-loop DC voltage signal TP102 is formed, which circulates back and forth to form a closed-loop control of the motor power.

10. A motor closed-loop control method as claimed in claim 8, characterized in that: The voltage of the DC amplified signal TP103 is used to change the conduction time of the thyristor Q111, thereby changing the output voltage of the plug terminal CNP101.

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