Variable-frequency driving device and variable-frequency control method and device for improving resonance over-amplitude

Abstract

The invention discloses a variable-frequency driving device and a variable-frequency control method and device for improving resonance over-amplitude. The method comprises the following steps: setting a carrier band set and a single-operation-cycle variable-frequency strategy; setting a carrier wave set according to the carrier wave band set; carrying out resonance over-amplitude detection on the small tube assembly through a vibration detection module to obtain a to-be-processed resonance over-amplitude frequency range set; overlapping region merging processing is carried out on the to-be-processed resonance over-amplitude frequency range set to obtain a target resonance over-amplitude frequency range set; selecting a resonance over-amplitude frequency range from the target resonance over-amplitude frequency range set as a target resonance over-amplitude frequency range; performing first carrier frequency adjustment processing to obtain a first frequency conversion control result; and if the first frequency conversion control result is that resonance over-amplitude still exists, performing second carrier frequency adjustment processing to obtain a second frequency conversion control result. According to the invention, frequency conversion control is realized, frequency conversion stability is improved, and cost is reduced. The method can be applied to the technical field of motor control.

Description

Technical Field

[0001] The present invention relates to the technical field of motor control, and in particular to a variable frequency drive device and a variable frequency control method and device for improving resonance over-amplitude. Background Art

[0002] In existing variable frequency driven air conditioning units, several small tube assemblies connected to the compressor often have frequency band resonance problems. If the amplitude of the resonance position exceeds a certain test standard, the vibration of the small tube assembly will cause some connection positions to undergo periodic repeated deformation, leading to fatigue damage of the mechanical structure, and then causing leakage of refrigerant and refrigeration oil. The traditional method is to change the resonance point by replacing the model, material, pipe routing, shape, angle or counterweight of the small tube assembly, but the cost of replacing the assembly structure is high. When the small tube assembly structure cannot be replaced, the resonance over-amplitude is avoided by jumping the frequency band, but the setting of the frequency modulation band affects the load linear regulation and the variable frequency stability is low.

[0003] In summary, the technical problems existing in the relevant technologies need to be improved. Summary of the invention

[0004] The embodiments of the present invention provide a variable frequency driving device and a variable frequency control method and device for improving resonance over-amplitude, which effectively improves the stability of variable frequency and reduces the cost.

[0005] On the one hand, an embodiment of the present invention provides a variable frequency drive device for improving resonance over-amplitude, comprising:

[0006] A vibration sensor module, the vibration sensor module is installed on the small pipe assembly of the chiller at intervals of one system component, and the vibration sensor module is used to detect the vibration amplitude;

[0007] A vibration transmitter module, the vibration transmitter module is connected to the vibration sensor module, and the vibration transmitter module is used to convert the vibration amplitude into an analog signal;

[0008] A frequency conversion module, which is used to adjust the operating frequency value;

[0009] The vibration detection module, the vibration transmission module and the frequency conversion module are both connected to the vibration detection module, and the vibration detection module is used to perform resonance over-amplitude judgment according to the operating frequency value and the analog signal to obtain a resonance over-amplitude judgment result.

[0010] In some embodiments, the vibration sensing module is connected to the vibration transmitting module via a sensor line.

[0011] The beneficial effects of the present invention are as follows:

[0012] The embodiment of the present invention provides a variable frequency drive device for improving resonance over-amplitude, including a vibration sensing module, a vibration transmission module, a frequency conversion module and a vibration detection module. Among them, the vibration sensing module is installed on the small tube assembly of the chiller with a system component as an interval, and is used to detect the vibration amplitude; the vibration transmission module is connected to the vibration sensing module, and is used to convert the vibration amplitude into an analog signal; the frequency conversion module is used to adjust the operating frequency value; the vibration transmission module and the frequency conversion module are both connected to the vibration detection module, and the vibration detection module is used to judge the resonance over-amplitude according to the operating frequency value and the analog signal, and obtain the resonance over-amplitude judgment result, thereby realizing the variable frequency drive device, improving the frequency conversion stability, and reducing the cost.

[0013] On the other hand, an embodiment of the present invention provides a variable frequency control method applied to the variable frequency drive device, comprising the following steps:

[0014] Set carrier segment set and single operation cycle frequency conversion strategy;

[0015] According to the carrier segment set, a carrier set is set, the carrier set including a first carrier frequency value, a second carrier frequency value and a third carrier frequency value, the first carrier frequency value is less than the second carrier frequency value, and the second carrier frequency value is less than the third carrier frequency value;

[0016] According to the single operation cycle frequency conversion strategy, the vibration detection module performs resonance over-amplitude detection on the small tube assembly to obtain a set of resonance over-amplitude frequency ranges to be processed;

[0017] Performing overlapping region merging processing on the to-be-processed resonance excess frequency range set to obtain a target resonance excess frequency range set;

[0018] Selecting a resonance super-amplitude frequency range from the target resonance super-amplitude frequency range set as the target resonance super-amplitude frequency range;

[0019] According to the first carrier frequency value, the second carrier frequency value and the target resonance over-amplitude frequency range, a first carrier frequency adjustment process is performed to obtain a first frequency conversion control result;

[0020] If the first frequency conversion control result shows that resonance over-amplitude still exists, a second carrier frequency adjustment process is performed according to the first carrier frequency value, the third carrier frequency value and the target resonance over-amplitude frequency range to obtain a second frequency conversion control result.

[0021] In some embodiments, the execution process of the single operating cycle frequency conversion strategy includes:

[0022] Set the operating frequency value of the frequency conversion module to 0;

[0023] Adjust the operating frequency value from 0 to the maximum frequency according to the controller's frequency increase and decrease rate;

[0024] Adjust the operating frequency value from the maximum frequency to 0 according to the controller's frequency increase and decrease rate.

[0025] In some embodiments, the setting of the carrier band set includes:

[0026] Generate a first carrier band according to a first boundary carrier value and a second boundary carrier value, where the first boundary carrier value is less than the second boundary carrier value;

[0027] Generate a second carrier band according to the second boundary carrier value and a third boundary carrier value, where the second boundary carrier value is less than the third boundary carrier value;

[0028] Generate a third carrier band according to the third boundary carrier value and a fourth boundary carrier value, where the third boundary carrier value is less than the fourth boundary carrier value;

[0029] Combine the first carrier band, the second carrier band, and the third carrier band to obtain the carrier band set.

[0030] In some embodiments, the setting of the carrier set according to the carrier band set includes:

[0031] Take the middle value of the first carrier band as the first carrier frequency value;

[0032] Take the middle value of the second carrier band as the second carrier frequency value;

[0033] Take the middle value of the third carrier band as the third carrier frequency value;

[0034] Combine the first carrier frequency value, the second carrier frequency value, and the third carrier frequency value to obtain the carrier set.

[0035] In some embodiments, the overlapping region merging process for the set of to-be-processed resonance over-amplitude frequency ranges to obtain the target resonance over-amplitude frequency range set includes:

[0036] Select two resonance over-amplitude frequency ranges from the set of to-be-processed resonance over-amplitude frequency ranges;

[0037] If there is a frequency overlapping region between the two resonance over-amplitude frequency ranges, then merge the two resonance over-amplitude frequency ranges to obtain the target resonance over-amplitude frequency range set.

[0038] In some embodiments, performing a first carrier frequency adjustment process based on the first carrier frequency value, the second carrier frequency value, and the target resonance overshoot frequency range to obtain a first frequency conversion control result includes:

[0039] Setting the carrier wave of the frequency conversion module to the first carrier frequency value;

[0040] When the frequency value of the frequency conversion module rises to the minimum value in the target resonance overshoot frequency range, updating the carrier wave of the frequency conversion module to the second carrier frequency value, so that the frequency value of the frequency conversion module drops to a first drop frequency value, and the first drop frequency value is less than the minimum value in the target resonance overshoot frequency range;

[0041] Calculating a target frequency value according to the maximum value in the target resonance overshoot frequency range and a preset frequency difference;

[0042] When the frequency value of the frequency conversion module rises to the target frequency value, updating the carrier wave of the frequency conversion module to the first carrier frequency value;

[0043] Generating the first frequency conversion control result according to the first judgment result of the vibration detection module.

[0044] In some embodiments, performing a second carrier frequency adjustment process based on the first carrier frequency value, the third carrier frequency value, and the target resonance overshoot frequency range to obtain a second frequency conversion control result includes:

[0045] Setting the carrier wave of the frequency conversion module to the first carrier frequency value;

[0046] When the frequency value of the frequency conversion module rises to the minimum value in the target resonance overshoot frequency range, updating the carrier wave of the frequency conversion module to the third carrier frequency value, so that the frequency value of the frequency conversion module drops to a second drop frequency value, and the second drop frequency value is less than the minimum value in the target resonance overshoot frequency range;

[0047] When the frequency value of the frequency conversion module rises to the target frequency value, updating the carrier wave of the frequency conversion module to the first carrier frequency value;

[0048] Generating the second frequency conversion control result according to the second judgment result of the vibration detection module.

[0049] On the other hand, an embodiment of the present invention provides a frequency conversion control device, including:

[0050] A first module, configured to set a carrier wave band set and a single operating cycle frequency conversion strategy;

[0051] A second module, configured to set a carrier set according to the set of carrier frequency bands, where the carrier set includes a first carrier frequency value, a second carrier frequency value, and a third carrier frequency value, the first carrier frequency value is less than the second carrier frequency value, and the second carrier frequency value is less than the third carrier frequency value;

[0052] A third module, configured to perform resonance over-amplitude detection on the small tube assembly through the vibration detection module according to the single operating cycle frequency conversion strategy, to obtain a set of to-be-processed resonance over-amplitude frequency ranges;

[0053] A fourth module, configured to perform overlapping region merging processing on the set of to-be-processed resonance over-amplitude frequency ranges to obtain a set of target resonance over-amplitude frequency ranges;

[0054] A fifth module, configured to select a resonance over-amplitude frequency range from the set of target resonance over-amplitude frequency ranges as the target resonance over-amplitude frequency range;

[0055] A sixth module, configured to perform first carrier frequency adjustment processing according to the first carrier frequency value, the second carrier frequency value, and the target resonance over-amplitude frequency range to obtain a first frequency conversion control result;

[0056] A seventh module, configured to, if the first frequency conversion control result indicates that resonance over-amplitude still exists, perform second carrier frequency adjustment processing according to the first carrier frequency value, the third carrier frequency value, and the target resonance over-amplitude frequency range to obtain a second frequency conversion control result.

[0057] The beneficial effects of the present invention are as follows:

[0058] In the embodiment of the present invention, first, a set of carrier frequency bands and a single operating cycle frequency conversion strategy are set, a carrier set is set according to the set of carrier frequency bands, and then, according to the single operating cycle frequency conversion strategy, resonance over-amplitude detection is performed on the small tube assembly through the vibration detection module to obtain a set of to-be-processed resonance over-amplitude frequency ranges. Overlapping region merging processing is performed on the set of to-be-processed resonance over-amplitude frequency ranges to obtain a set of target resonance over-amplitude frequency ranges. Then, a resonance over-amplitude frequency range is selected from the set of target resonance over-amplitude frequency ranges as the target resonance over-amplitude frequency range. Finally, first carrier frequency adjustment processing is performed according to the first carrier frequency value, the second carrier frequency value, and the target resonance over-amplitude frequency range to obtain a first frequency conversion control result. If the first frequency conversion control result indicates that resonance over-amplitude still exists, second carrier frequency adjustment processing is performed according to the first carrier frequency value, the third carrier frequency value, and the target resonance over-amplitude frequency range to obtain a second frequency conversion control result, thereby realizing frequency conversion control, improving frequency conversion stability, and reducing costs.

[0059] Other features and advantages of the present invention will be set forth in the following description, and in part will be obvious from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the structure particularly pointed out in the specification and the drawings. Description of the Drawings

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0061] Figure 1 It is a schematic diagram of a centrifugal compressor according to an embodiment of the present invention and the refrigerant and refrigerating oil pipeline assemblies connected thereto;

[0062] Figure 2 It is a schematic diagram of the structure of a variable frequency drive device for improving resonance overshoot according to an embodiment of the present invention;

[0063] Figure 3 It is a flowchart of a variable frequency control method according to an embodiment of the present invention;

[0064] Figure 4 It is a schematic diagram of the overall process of adaptive adjustment of the carrier wave of an inverter according to an embodiment of the present invention;

[0065] Figure 5 It is a schematic diagram of the structure of a variable frequency control device according to an embodiment of the present invention. Detailed Embodiments

[0066] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0067] It can be understood that the terms "first", "second", etc. used in this application may be used herein to describe various concepts, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another. For example, without departing from the scope of the embodiments of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if", "when" as used herein may be interpreted as "when...", "while...", or "in response to determining".

[0068] The terms "at least one", "a plurality of", "each", "any one", etc. used in this application, at least one includes one, two or more than two, a plurality of includes two or more than two, each refers to each one of the corresponding plurality, and any one refers to any one of the plurality.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0070] Before elaborating on the embodiments of this application in detail, some of the nouns and terms involved in the embodiments of this application are first described, and the nouns and terms involved in the embodiments of this application are applicable to the following explanations.

[0071] Resonance over-amplitude: It refers to that in several small tube components connected to the compressor, when in a certain frequency band, the amplitude at the resonance position exceeds the test standard.

[0072] In the related art, in existing variable-frequency drive air-conditioning units, such as centrifugal / screw chillers, resonance often occurs in certain frequency bands of some compressors in several small pipe assemblies connected to the compressor. If the amplitude at these resonance positions is large and exceeds a certain test standard, the entire unit will be judged unqualified. Because the vibration of the small pipe assembly will cause periodic repeated deformation at some connection positions, and over time, it will lead to fatigue damage of the mechanical structure, and then cause leakage of refrigerant and refrigeration oil. Currently, the treatment methods in the industry mainly deal with such problems through structural means, including: (1) replacing the model of the small pipe assembly and increasing the inner diameter of the small pipe, so as to reduce the flow velocity in the pipe and the resonance frequency point; (2) replacing the material of the small pipe, such as replacing the copper pipe with a stainless steel pipe, so as to change the resonance site of this section of the small pipe; (3) changing the routing path, shape, and angle of the small pipe, so as to change the resonance position; (4) adding a counterweight to the small pipe assembly or adding a shock pad to change the resonance position of the pipeline. In addition, when it is impossible to avoid the resonance of the small pipe assembly, the industry generally avoids it by skipping frequency bands. For example, it is detected that the resonance in the frequency band of "40-45Hz" is serious, and the corresponding frequency band is set in the preset program of the frequency converter. When the frequency converter is ascending or descending in frequency, it will quickly pass through this frequency band to reduce the occurrence time of resonance. However, the original intention of using variable-frequency units in general projects is to smoothly adjust the cooling capacity under different cooling capacity requirements. Frequent setting of "frequency skip bands" will damage the stable output of the cooling capacity of the variable-frequency unit and cause frequent fluctuations in the entire refrigeration system. For the discrimination of the frequency skip range, it is generally judged by setting a patch on the main pipeline to test its "vibration amplitude" and setting an "acceleration sensor" to see if it meets the relevant standards. That is to say, it is necessary for the test personnel to judge whether it exceeds the vibration amplitude based on the data recorded by the test instrument and record the "frequency skip band" that needs to be set.

[0073] Currently, several traditional shock absorption measures all improve the influence of resonance by changing the resonance position of the pipeline through changing the structure. The disadvantages of traditional shock absorption methods are as follows: (1) The cost increases. Whether it is changing the existing structural scheme or adding a new counterweight and other schemes, it will increase the manufacturing and testing costs of the entire unit; (2) From the perspective of the deterioration factor "generation -> transmission -> influence", the above methods only act on "reducing the influence" and "avoiding the influence", and do not solve the vibration problem at the source of the problem; (3) According to the actual test data of each unit compared with the relevant national standards for vibration, and then manually set the frequency skip band to improve the vibration state of the small pipe assembly. However, setting too many frequency adjustment bands will lose the meaning of using variable-frequency technology to achieve linear load adjustment.

[0074] In view of this, in the embodiments of the present invention, the carrier (fc) frequency of the variable frequency drive is dynamically adjusted according to the resonance over-amplitude frequency range, thereby weakening the resonance over-amplitude of the small tube assembly, improving the variable frequency stability, and reducing the cost.

[0075] The embodiments of the present application will be specifically explained below with reference to the accompanying drawings:

[0076] In some embodiments, the refrigerant and refrigerating oil pipeline assembly is used as the detection target. An example of the centrifugal compressor and its connected refrigerant and refrigerating oil pipeline assembly is Figure 1 shown. The compressor consists of a guide vane regulating valve M1 at the front end, a compressor main body (first-stage and second-stage impellers), and a driving motor at the rear. The suction port of the compressor is connected to the evaporator of the chiller air conditioner, and the discharge port of the compressor is connected to the condenser of the chiller air conditioner. The remaining part is the small tube assembly connected to the compressor. According to the legend markings, the filled ones are refrigerant pipes, and the unfilled ones are oil pipes. There are four small tube assemblies in the figure, which are respectively defined as small tube assembly A, small tube assembly B, small tube assembly C, and small tube assembly D; among them, small tube assemblies A and B are refrigerant small tubes, and small tube assemblies C and D are oil pipeline small tubes. The refrigerant small tube assembly mainly leads out from the condenser to cool down and dissipate heat for the centrifugal refrigerating oil and the main motor, including: refrigerant small tube assembly A, passing through the plate heat exchanger of the oil cooler through filter A, and after the refrigerant takes away the heat of the refrigerating oil, it returns to the evaporator through the cooling capacity regulating valve M2; refrigerant small tube assembly B, passing through filter B and connecting to the main motor to cool down the compressor motor. The oil pipeline small tube assembly mainly collects the refrigerating lubricating oil from the rear end of the second-stage impeller of the compressor, passes through the oil pump and then returns to the compressor through two groups of small tubes, including: oil pipeline small tube assembly C, coming out from the oil pump, passing through the oil cooler, and through regulating valve M3, and then through the oil filter to the middle part of the compressor; oil pipeline small tube assembly D, coming out from the oil pump, passing through the oil dryer, and sent to the venturi tube position at the second-stage impeller, and mixing and sending back the oil in the evaporator return oil pipe to the second-stage impeller of the compressor by means of ejection. When the variable frequency motor drives the compressor to operate, the phenomenon of excessive vibration (resonance) amplitude mainly occurs at a certain position point of these 4 types of small tube assemblies. At different operating frequencies, the position where resonance occurs may appear at different one or several positions.

[0077] In some embodiments, as Figure 2 shown, the embodiments of the present invention provide a variable frequency drive device for improving resonance over-amplitude, including:

[0078] A vibration sensing module 201, which is installed on the small tube assembly of the chiller at intervals of a system component, and the vibration sensing module is used to detect the vibration amplitude;

[0079] A vibration transmitter module 202, which is connected to the vibration sensor module and is used to convert the vibration amplitude into an analog signal;

[0080] A frequency conversion module 203, which is used to adjust the operating frequency value;

[0081] The vibration detection module 204, the vibration transmission module and the frequency conversion module are both connected to the vibration detection module, and the vibration detection module is used to perform resonance over-amplitude judgment according to the operating frequency value and the analog signal to obtain a resonance over-amplitude judgment result.

[0082] In some embodiments, the embodiments of the present invention provide a variable frequency drive device for improving resonance over-amplitude, including a vibration sensing module 201, a vibration transmitter module 202, a frequency conversion module 203 and a vibration detection module 204. The vibration sensing module is installed on the small tube assembly of the chiller at intervals of one system component to detect the vibration amplitude. Exemplarily, the vibration sensing module may include a vibration sensor, which may be installed on the small tube assembly that may produce resonance over-amplitude. The vibration sensor may be arranged according to actual needs, such as arranging one on the pipeline of each system component. The vibration transmitter module is connected to the vibration sensing module to convert the vibration amplitude into an analog signal. In some embodiments, the vibration sensing module 201 is connected to the vibration transmitter module 202 via a sensor line. Exemplarily, the vibration transmitter module may include a vibration transmitter, which is connected to the vibration sensor via a sensor line, and the vibration transmitter may convert the vibration amplitude into an analog signal of 0V-10V or 4mA-20mA, and the sensor line may include AIn and COM. The frequency conversion module is used to adjust the operating frequency value, and the frequency conversion module may include a frequency converter. The vibration transmitter module and the frequency conversion module are both connected to the vibration detection module, and the vibration detection module (controller) is used to perform resonance over-amplitude judgment according to the operating frequency value and the analog signal, and obtain the resonance over-amplitude judgment result. Exemplarily, the vibration transmitter is connected to the vibration detection module 204 through a sensor line, and the vibration detection module 204 is connected to the frequency converter through a communication line. When the frequency converter is running, the vibration detection module reads the operating frequency value of the frequency converter in real time through communication, and controls the frequency converter to gradually increase or decrease the frequency during the test process, and reads the vibration value fed back by each vibration sensor at the same time, and compares the preset vibration limit value to determine whether resonance over-amplitude has occurred, and obtain the resonance over-amplitude judgment result.

[0083] In some embodiments, it is known that conventional centrifuge unit variable frequency drives usually use a fixed carrier wave for operation, which is set before the frequency converter is operated and cannot be adjusted during operation. However, the carrier wave in this embodiment can be automatically adjusted during operation. The frequency (fc) of the carrier wave is generally set in three frequency bands: (1) 1kHz to 4kHz; (2) 4kHz to 8kHz; (3) 8kHz to 16kHz. Conventional frequency converters will select one value from each of these three carrier frequency bands as the default configuration.

[0084] In some embodiments, the impact of increased carrier frequency on the vibration of the system and the small tube is that the higher the carrier frequency, the smaller the torque pulsation output by the inverter, that is, the more stable the operation of the motor, and the smaller the vibration impact on the small tube component. However, the higher the carrier frequency, the worse the impact on the motor and the running circuit: first, the switching loss caused by the frequent switching of the inverter; second, the motor will be subjected to a higher voltage change rate (du / dt). In high-power motors, the distributed capacitance of the motor winding is large, and excessive du / dt will cause the motor winding to withstand a higher voltage profit, and long-term operation will easily lead to motor insulation aging; thirdly, high-frequency carrier will increase electromagnetic interference EMI. Therefore, for the sake of stable system operation and energy saving, the default setting of the inverter's carrier frequency is generally low.

[0085] The beneficial effects of implementing the embodiments of the present invention include: the embodiments of the present invention provide a variable frequency drive device for improving resonance over-amplitude, including a vibration sensing module, a vibration transmission module, a frequency conversion module and a vibration detection module. Among them, the vibration sensing module is installed on the small tube assembly of the chiller with a system component as an interval, and is used to detect the vibration amplitude; the vibration transmission module is connected to the vibration sensing module, and is used to convert the vibration amplitude into an analog signal; the frequency conversion module is used to adjust the operating frequency value; the vibration transmission module and the frequency conversion module are both connected to the vibration detection module, and the vibration detection module is used to perform resonance over-amplitude judgment based on the operating frequency value and the analog signal, and obtain the resonance over-amplitude judgment result, thereby realizing a variable frequency drive device, improving the stability of frequency conversion, and reducing costs.

[0086] A frequency conversion control method provided by an embodiment of the present application relates to the technical field of motor control. The frequency conversion control method provided by the embodiment of the present application can be applied to a terminal, can also be applied to a server, or can be software running on a terminal or a server. In some embodiments, the terminal can be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart watch, a vehicle-mounted terminal, etc., but is not limited thereto; the server side can be configured as an independent physical server, can also be configured as a server cluster or a distributed system composed of multiple physical servers, and can also be configured as a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms. The server can also be a node server in a blockchain network; the software can be an application implementing a frequency conversion control method, etc., but is not limited to the above forms.

[0087] The present application can be used in many general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet-type devices, multi-processor systems, microprocessor-based systems, set-top boxes, programmable consumer electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, and so on. The present application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The present application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0088] Figure 3 is an optional flowchart of a frequency conversion control method applied to a frequency conversion drive device provided by an embodiment of the present application, Figure 3 The method in can include but is not limited to steps S301 to S307.

[0089] Step S301, set a carrier wave band set and a single operating cycle frequency conversion strategy;

[0090] Step S302, according to the carrier wave band set, set a carrier wave set, the carrier wave set includes a first carrier wave frequency value, a second carrier wave frequency value, and a third carrier wave frequency value, the first carrier wave frequency value is less than the second carrier wave frequency value, and the second carrier wave frequency value is less than the third carrier wave frequency value;

[0091] Step S303: According to the single - cycle frequency conversion strategy, the vibration detection module performs resonance over - amplitude detection on the small - tube assembly to obtain a set of to - be - processed resonance over - amplitude frequency ranges;

[0092] Step S304: Perform overlapping - area merging processing on the set of to - be - processed resonance over - amplitude frequency ranges to obtain a set of target resonance over - amplitude frequency ranges;

[0093] Step S305: Select a resonance over - amplitude frequency range from the set of target resonance over - amplitude frequency ranges as the target resonance over - amplitude frequency range;

[0094] Step S306: According to the first carrier frequency value, the second carrier frequency value, and the target resonance over - amplitude frequency range, perform first - carrier - frequency adjustment processing to obtain a first frequency - conversion control result;

[0095] Step S307: If the first frequency - conversion control result indicates that resonance over - amplitude still exists, then according to the first carrier frequency value, the third carrier frequency value, and the target resonance over - amplitude frequency range, perform second - carrier - frequency adjustment processing to obtain a second frequency - conversion control result.

[0096] Steps S301 to S307 shown in the embodiments of the present application achieve frequency - conversion control, improve frequency - conversion stability, and reduce costs.

[0097] In some embodiments, in step S301, setting the carrier - band set may include, but is not limited to, the following steps:

[0098] Generate a first carrier band according to the first boundary carrier value and the second boundary carrier value, where the first boundary carrier value is less than the second boundary carrier value;

[0099] Generate a second carrier band according to the second boundary carrier value and the third boundary carrier value, where the second boundary carrier value is less than the third boundary carrier value;

[0100] Generate a third carrier band according to the third boundary carrier value and the fourth boundary carrier value, where the third boundary carrier value is less than the fourth boundary carrier value;

[0101] Combine the first carrier band, the second carrier band, and the third carrier band to obtain the carrier - band set.

[0102] In some embodiments, a first carrier wave band may be generated based on a first boundary carrier wave value and a second boundary carrier wave value, where the first boundary carrier wave value is less than the second boundary carrier wave value. Exemplarily, the first boundary carrier wave value may be 1 kHz, the second boundary carrier wave value may be 4 kHz, and the first carrier wave band may be 1 kHz - 4 kHz. Then, a second carrier wave band is generated based on the second boundary carrier wave value and a third boundary carrier wave value, where the second boundary carrier wave value is less than the third boundary carrier wave value; Exemplarily, the third boundary carrier wave value may be 8 kHz, and the second carrier wave band may be 4 kHz - 8 kHz. Next, a third carrier wave band is generated based on the third boundary carrier wave value and a fourth boundary carrier wave value, where the third boundary carrier wave value is less than the fourth boundary carrier wave value; Exemplarily, the fourth boundary carrier wave value may be 16 kHz, and the third carrier wave band may be 8 kHz - 16 kHz. Finally, the first carrier wave band, the second carrier wave band, and the third carrier wave band are combined to obtain a carrier wave band set.

[0103] In some embodiments, in step S301, the execution process of the single operating cycle frequency conversion strategy includes:

[0104] Set the operating frequency value of the frequency conversion module to 0;

[0105] Adjust the operating frequency value from 0 to the maximum frequency value according to the controller's frequency increase and decrease rate;

[0106] Adjust the operating frequency value from the maximum frequency value to 0 according to the controller's frequency increase and decrease rate.

[0107] In some embodiments, the execution process of the single operating cycle frequency conversion strategy may first set the operating frequency value of the frequency conversion module to 0, then adjust the operating frequency value from 0 to the maximum frequency value according to the controller's frequency increase and decrease rate, and then adjust the operating frequency value from the maximum frequency value to 0 according to the controller's frequency increase and decrease rate. Exemplarily, in one operating cycle of the single operating cycle frequency conversion strategy, after the frequency converter is powered on, it operates from the minimum frequency fmin (i.e., 0 Hz) to the highest upper limit value fmax (i.e., the maximum frequency value), and then from the frequency upper limit value fmax to fmin (i.e., 0 Hz). By setting the controller's frequency increase and decrease rate (e.g., increasing or decreasing the frequency by 1 Hz per second), it is possible to accurately feedback whether each small tube component vibrates to the vibration detection module at each frequency value.

[0108] In some embodiments, in step S302, setting the carrier wave set according to the carrier wave band set may include, but is not limited to, the following steps:

[0109] Use the middle value of the first carrier wave band as the first carrier wave frequency value;

[0110] Use the middle value of the second carrier wave band as the second carrier wave frequency value;

[0111] Take the median value of the third carrier wave band as the third carrier frequency value;

[0112] Combine the first carrier frequency value, the second carrier frequency value, and the third carrier frequency value to obtain a carrier set.

[0113] In some embodiments, the median value of the first carrier wave band can be taken as the first carrier frequency value Fc1, where 1 kHz < Fc1 < 4 kHz, then the median value of the second carrier wave band can be taken as the second carrier frequency value Fc2, where 4 kHz < Fc2 < 8 kHz, and then the median value of the third carrier wave band can be taken as the third carrier frequency value Fc3, where 8 kHz < Fc3 < 16 kHz. Finally, the first carrier frequency value, the second carrier frequency value, and the third carrier frequency value are combined to obtain a carrier set. Moreover, the initial setting of the inverter carrier is Fc1, where Fc1 < Fc2 < Fc3.

[0114] In some embodiments, in step S303, according to the single operating cycle frequency conversion strategy, the vibration detection module can perform resonance amplitude overrun detection on the small tube assembly to obtain a set of frequency ranges of resonance amplitude overrun to be processed. Exemplarily, in the first operating cycle, the vibration detection module can perform resonance amplitude overrun detection on the small tube assembly to confirm the frequency range where each small tube assembly has vibration amplitude overrun, and obtain a set of frequency ranges of resonance amplitude overrun to be processed.

[0115] In some embodiments, in step S304, the set of frequency ranges of resonance amplitude overrun to be processed is subjected to overlapping region merging processing to obtain a set of target resonance amplitude overrun frequency ranges, which may include but are not limited to the following steps:

[0116] Select two resonance amplitude overrun frequency ranges from the set of frequency ranges of resonance amplitude overrun to be processed;

[0117] If there is a frequency overlapping region between the two resonance amplitude overrun frequency ranges, then the two resonance amplitude overrun frequency ranges are merged to obtain a set of target resonance amplitude overrun frequency ranges.

[0118] In some embodiments, in the second operating cycle, in order to reconfirm whether the resonance amplitude overrun region phenomenon in the first operating cycle is consistent, repeated detection can be performed. After the detection is completed, the vibration detection module will mark the resonance regions of each small tube assembly inside the system, such as intervals 1, 2 ……, n. When there is an overlap in the frequency values of resonance amplitude overrun of a small tube assembly, the set of frequency ranges of resonance amplitude overrun to be processed is subjected to overlapping region merging processing to obtain a set of target resonance amplitude overrun frequency ranges. Two resonance amplitude overrun frequency ranges can be selected from the set of frequency ranges of resonance amplitude overrun to be processed first. If there is a frequency overlapping region between the two resonance amplitude overrun frequency ranges, then the two resonance amplitude overrun frequency ranges are merged in the resonance region standard to obtain a set of target resonance amplitude overrun frequency ranges.

[0119] In some embodiments, in step S305, a resonance over-amplitude frequency range can be selected from the set of target resonance over-amplitude frequency ranges as the target resonance over-amplitude frequency range, so as to facilitate subsequent adaptive carrier frequency adjustment processing for this target resonance over-amplitude frequency range. Moreover, the same adaptive carrier frequency adjustment processing can be performed on each resonance over-amplitude frequency range in the set of target resonance over-amplitude frequency ranges to obtain corresponding frequency conversion control results.

[0120] In some embodiments, in step S306, performing first carrier frequency adjustment processing according to the first carrier frequency value, the second carrier frequency value, and the target resonance over-amplitude frequency range to obtain the first frequency conversion control result may include, but is not limited to, the following steps:

[0121] Set the carrier of the frequency conversion module to the first carrier frequency value;

[0122] When the frequency value of the frequency conversion module rises to the minimum value in the target resonance over-amplitude frequency range, update the carrier of the frequency conversion module to the second carrier frequency value, so that the frequency value of the frequency conversion module drops to the first drop frequency value, and the first drop frequency value is less than the minimum value in the target resonance over-amplitude frequency range;

[0123] Calculate the target frequency value according to the maximum value in the target resonance over-amplitude frequency range and the preset frequency difference;

[0124] When the frequency value of the frequency conversion module rises to the target frequency value, update the carrier of the frequency conversion module to the first carrier frequency value;

[0125] Generate the first frequency conversion control result according to the first judgment result of the vibration detection module.

[0126] In some embodiments, in the third operating cycle, a first carrier frequency adjustment process is performed on the collected target resonance over-amplitude frequency range. The carrier of the frequency conversion module can be first set to the first carrier frequency value. When the frequency value of the frequency conversion module rises to the minimum value in the target resonance over-amplitude frequency range, the carrier of the frequency conversion module is updated to the second carrier frequency value, so that the frequency value of the frequency conversion module drops to the first drop frequency value, where the first drop frequency value is less than the minimum value in the target resonance over-amplitude frequency range. Exemplarily, if resonance over-amplitude has occurred at a certain position of the small tube assembly (A / B / C / D) in the frequency range n (f1 - f2) during the first and second operating cycles, then in the third operating cycle, when the frequency converter runs to a frequency of f1 Hz, the carrier of the frequency converter is switched from the first carrier frequency value Fc1 to the second carrier frequency value Fc2. This brief switching process will cause the frequency of the frequency converter to drop to the first drop frequency value f1' (f1' < f1). It can be understood that f1' is a value obtained by continuous monitoring, which is related to the operating state and characteristics of the motor. During the carrier switching process, the motor will temporarily lose driving force, and at this time the motor speed will decrease. The motor monitoring module in the driving device detects the operating frequency value of the motor in real time. After the carrier of the device is switched, the motor frequency needs to be continuously pulled up at an appropriate frequency value. Then, according to the maximum value in the target resonance over-amplitude frequency range and the preset frequency difference, the target frequency value is calculated. The calculation formula for the target frequency value is: f2' = f2 - Δf2, where f2' is the target frequency value, f2 is the maximum value in the target resonance over-amplitude frequency range, and Δf2 is the preset frequency difference. The range of Δf2 can be set to 3 Hz - 5 Hz and can be set in the frequency converter parameters. When the frequency value of the frequency conversion module rises to the target frequency value, the carrier of the frequency conversion module is updated to the first carrier frequency value. Finally, according to the first judgment result of the vibration detection module, a first frequency conversion control result is generated. Exemplarily, the frequency converter that has completed the carrier switching will determine the motor operating position through the built-in algorithm observer and raise the operating frequency value from f1' to f2' again (f2' > f2). If no resonance over-amplitude occurs during this process, then when the operating frequency value reaches f2', the carrier of the frequency converter is adjusted back to Fc1 to generate the first frequency conversion control result.

[0127] In some embodiments, in step S307, according to the first carrier frequency value, the third carrier frequency value, and the target resonance over-amplitude frequency range, a second carrier frequency adjustment process is performed to obtain a second frequency conversion control result, which may include but is not limited to the following steps:

[0128] Set the carrier of the frequency conversion module to the first carrier frequency value;

[0129] When the frequency value of the frequency conversion module rises to the minimum value in the target resonance over-amplitude frequency range, update the carrier wave of the frequency conversion module to the third carrier wave frequency value, so that the frequency value of the frequency conversion module drops to the second decreasing frequency value, and the second decreasing frequency value is less than the minimum value in the target resonance over-amplitude frequency range;

[0130] When the frequency value of the frequency conversion module rises to the target frequency value, update the carrier wave of the frequency conversion module to the first carrier wave frequency value;

[0131] Generate a second frequency conversion control result according to the second judgment result of the vibration detection module.

[0132] In some embodiments, in the fourth operation cycle, if resonance over-amplitude still exists in the target resonance over-amplitude frequency range after the first carrier wave frequency adjustment process, perform a second carrier wave frequency adjustment process on the target resonance over-amplitude frequency range. The carrier wave of the frequency conversion module can be first set to the first carrier wave frequency value. When the frequency value of the frequency conversion module rises to the minimum value in the target resonance over-amplitude frequency range, update the carrier wave of the frequency conversion module to the third carrier wave frequency value, so that the frequency value of the frequency conversion module drops to the second decreasing frequency value, and the second decreasing frequency value is less than the minimum value in the target resonance over-amplitude frequency range; when the frequency value of the frequency conversion module rises to the target frequency value, update the carrier wave of the frequency conversion module to the first carrier wave frequency value, and then generate a second frequency conversion control result according to the second judgment result of the vibration detection module. Exemplarily, if resonance over-amplitude still exists in the target resonance over-amplitude frequency range after the first carrier wave frequency adjustment process, that is, the frequency interval n(f1 - f2), in this operation cycle, when the frequency converter runs to the frequency of f1Hz, the carrier wave of the frequency converter will be actively switched from the first carrier wave frequency value Fc1 to the third carrier wave frequency value Fc3. During this short switching process, the frequency of the frequency converter will drop to the second decreasing frequency value f3’ (f3’ < f1). The frequency converter that has completed the carrier wave switching will determine the motor operation position through the built-in algorithm observer and rise from f3’ to f4’ (f4’ > f2) again. If no resonance over-amplitude occurs during this period, when the operating frequency value reaches f4’, adjust the carrier wave of the frequency converter back to the first carrier wave frequency value Fc1. It can be understood that the carrier waves switched by the first carrier wave frequency adjustment process and the second carrier wave frequency adjustment process are different. The first carrier wave frequency adjustment process switches to the second carrier wave frequency value Fc2, and the second carrier wave frequency adjustment process switches to the third carrier wave frequency value Fc3, and Fc2 < Fc3.

[0133] In some embodiments, after the controller completes the adaptive adjustment for four operating cycles, it judges the vibration state: (1) If it operates normally in the first two cycles and no resonance overshoot occurs, the function of adaptive carrier adjustment will not be triggered; (2) In the third operating cycle, when resonance overshoot occurs and the carrier is switched from Fc1 to Fc2, and the resonance overshoot is eliminated, the system will record this operating data and write the parameters into the frequency converter; if the problem cannot be solved, the next-stage adaptive carrier adjustment function will be triggered; (3) In the fourth operating cycle, when resonance overshoot occurs and the carrier is switched from Fc1 to Fc3, and the resonance overshoot is eliminated, the system will record this operating data and write the parameters into the frequency converter; if the problem cannot be solved, it proves that this problem can no longer be solved solely by setting the carrier frequency. The system prompts the user to make structural changes (such as increasing the thickness of this section of the small tube, changing the material, or adding counterweights) through the controller and then repeat the adaptive adjustment. Further, after completing all test links, the resonance overshoot problem of the chiller is effectively improved. At this time, the vibration test module has written the carrier frequency values corresponding to each frequency band into the operating parameters of the frequency converter. The tester can remove the variable-frequency drive device on the small tube assembly and perform other test links. When all test contents are completed, the chiller can be delivered to the customer for use.

[0134] In some embodiments, the overall process of adaptive adjustment of the frequency converter carrier is as Figure 4 shown. First, according to the single-operating-cycle frequency conversion strategy, the first operating cycle can be executed to detect the frequency range of resonance overshoot, and then the second operating cycle is executed to confirm the resonance overshoot interval. If resonance overshoot occurs, the third operating cycle is executed to perform the adaptive adjustment strategy 1, that is, the first carrier frequency adjustment process, including adjusting the carrier from Fc1 to Fc2. If the resonance overshoot point is still not eliminated, the fourth operating cycle is executed to perform the adaptive adjustment strategy 2, that is, the second carrier frequency adjustment process, including adjusting the carrier from Fc1 to Fc3. Compare and select the appropriate adaptive adjustment strategy. If the resonance overshoot point is still not eliminated, the controller issues an instruction to prompt the customer to change the structure of the small tube assembly where resonance overshoot occurs; if the resonance overshoot point has been eliminated, the controller of the variable-frequency drive device writes the carrier frequency values at different operating frequencies into the frequency converter, removes the variable-frequency drive device, and after completing other parts of the test, it is delivered to the customer.

[0135] In some embodiments, this embodiment can improve the generation of motor vibration at the source of the frequency converter driving the motor. Instead of canceling the "frequency jump band", it uses a carrier frequency gear of the frequency converter to achieve smooth adjustment in the entire frequency band. This embodiment adopts an automatic measurement method, and through a preset vibration determination value, it automatically adjusts the operation strategy through the algorithm inside the frequency converter to improve the resonance problem. It can be extended and applied to other refrigeration units such as centrifuges, screw machines, and modular machines; it can be applied to other variable-frequency drive devices such as water pumps, air compressors, and fans. The device and method of this embodiment can be applied to scenarios of water pump pipeline resonance and fan air duct resonance.

[0136] The beneficial effects of implementing the embodiments of the present invention include: The embodiments of the present invention first set a carrier frequency band set and a single operating cycle variable-frequency strategy. According to the carrier frequency band set, a carrier wave set is set. Then, according to the single operating cycle variable-frequency strategy, the vibration detection module performs resonance amplitude overshoot detection on the small tube assembly to obtain a set of frequency ranges of resonance amplitude overshoot to be processed. The overlapping regions of the set of frequency ranges of resonance amplitude overshoot to be processed are merged to obtain a set of target resonance amplitude overshoot frequency ranges. Then, a resonance amplitude overshoot frequency range is selected from the set of target resonance amplitude overshoot frequency ranges as the target resonance amplitude overshoot frequency range. Finally, according to the first carrier frequency value, the second carrier frequency value, and the target resonance amplitude overshoot frequency range, the first carrier frequency adjustment process is performed to obtain the first variable-frequency control result. If the first variable-frequency control result still shows resonance amplitude overshoot, then according to the first carrier frequency value, the third carrier frequency value, and the target resonance amplitude overshoot frequency range, the second carrier frequency adjustment process is performed to obtain the second variable-frequency control result, thereby realizing variable-frequency control, improving variable-frequency stability, and reducing costs.

[0137] As Figure 5 shown, the embodiments of the present invention also provide a variable-frequency control device, including:

[0138] A first module 801, configured to set a carrier frequency band set and a single operating cycle variable-frequency strategy;

[0139] A second module 802, configured to set a carrier wave set according to the carrier frequency band set. The carrier wave set includes a first carrier frequency value, a second carrier frequency value, and a third carrier frequency value. The first carrier frequency value is less than the second carrier frequency value, and the second carrier frequency value is less than the third carrier frequency value;

[0140] A third module 803, configured to perform resonance amplitude overshoot detection on the small tube assembly through the vibration detection module according to the single operating cycle variable-frequency strategy to obtain a set of frequency ranges of resonance amplitude overshoot to be processed;

[0141] A fourth module 804, configured to perform overlapping region merging processing on the set of frequency ranges of resonance amplitude overshoot to be processed to obtain a set of target resonance amplitude overshoot frequency ranges;

[0142] The fifth module 805 is configured to select a resonance amplitude exceeding frequency range from the set of target resonance amplitude exceeding frequency ranges as the target resonance amplitude exceeding frequency range;

[0143] The sixth module 806 is configured to perform first carrier frequency adjustment processing according to the first carrier frequency value, the second carrier frequency value, and the target resonance amplitude exceeding frequency range to obtain a first frequency conversion control result;

[0144] The seventh module 807 is configured to, if the first frequency conversion control result indicates that resonance amplitude still exceeds, perform second carrier frequency adjustment processing according to the first carrier frequency value, the third carrier frequency value, and the target resonance amplitude exceeding frequency range to obtain a second frequency conversion control result.

[0145] The content in the above method embodiments is applicable to the device embodiments of the present application. The functions specifically implemented by the device embodiments of the present application are the same as those in the above method embodiments, and the beneficial effects achieved are also the same as those in the above method embodiments.

[0146] The preferred embodiments of the embodiments of the present application have been described above with reference to the accompanying drawings. However, the scope of the claims of the embodiments of the present application is not limited thereby. Any modifications, equivalent replacements, and improvements made by those skilled in the art without departing from the scope and essence of the embodiments of the present application shall fall within the scope of the claims of the embodiments of the present application.

Claims

1. A variable frequency drive device for improving resonance over-amplitude, characterized in that: include: A vibration sensor module, the vibration sensor module is installed on the small pipe assembly of the chiller at intervals of one system component, and the vibration sensor module is used to detect the vibration amplitude; A vibration transmitter module, the vibration transmitter module is connected to the vibration sensor module, and the vibration transmitter module is used to convert the vibration amplitude into an analog signal; A frequency conversion module, which is used to adjust the operating frequency value; The vibration detection module, the vibration transmission module and the frequency conversion module are both connected to the vibration detection module, and the vibration detection module is used to perform resonance over-amplitude judgment according to the operating frequency value and the analog signal to obtain a resonance over-amplitude judgment result.

2. The variable frequency drive device according to claim 1, characterized in that: The vibration sensing module is connected to the vibration transmitting module through a sensor line.

3. A frequency conversion control method applied to the frequency conversion drive device according to any one of claims 1 to 2, characterized in that: The following steps are involved: Set carrier segment set and single operation cycle frequency conversion strategy; According to the carrier segment set, a carrier set is set, the carrier set including a first carrier frequency value, a second carrier frequency value and a third carrier frequency value, the first carrier frequency value is less than the second carrier frequency value, and the second carrier frequency value is less than the third carrier frequency value; According to the single operation cycle frequency conversion strategy, the vibration detection module performs resonance over-amplitude detection on the small tube assembly to obtain a set of resonance over-amplitude frequency ranges to be processed; Performing overlapping region merging processing on the to-be-processed resonance excess frequency range set to obtain a target resonance excess frequency range set; Selecting a resonance super-amplitude frequency range from the target resonance super-amplitude frequency range set as the target resonance super-amplitude frequency range; According to the first carrier frequency value, the second carrier frequency value and the target resonance over-amplitude frequency range, a first carrier frequency adjustment process is performed to obtain a first frequency conversion control result; If the first frequency conversion control result shows that resonance over-amplitude still exists, a second carrier frequency adjustment process is performed according to the first carrier frequency value, the third carrier frequency value and the target resonance over-amplitude frequency range to obtain a second frequency conversion control result.

4. The method according to claim 3, characterized in that: The execution process of the single operation cycle frequency conversion strategy includes: Set the operating frequency value of the frequency conversion module to 0; According to the controller frequency increase / decrease rate, the operating frequency value is adjusted from 0 to the maximum frequency; According to the controller frequency increase / decrease rate, the operating frequency value is adjusted from the maximum frequency to 0.

5. The method according to claim 3, characterized in that: The setting of the carrier segment set includes: generating a first carrier segment according to a first boundary carrier value and a second boundary carrier value, wherein the first boundary carrier value is smaller than the second boundary carrier value; generating a second carrier segment according to the second boundary carrier value and a third boundary carrier value, wherein the second boundary carrier value is smaller than the third boundary carrier value; generating a third carrier segment according to the third boundary carrier value and the fourth boundary carrier value, wherein the third boundary carrier value is smaller than the fourth boundary carrier value; The first carrier segment, the second carrier segment and the third carrier segment are combined to obtain the carrier segment set.

6. The method according to claim 5, characterized in that The setting of a carrier set according to the carrier segment set includes: Using the middle value of the first carrier frequency segment as the first carrier frequency value; Using the middle value of the second carrier frequency segment as the second carrier frequency value; Using the middle value of the third carrier frequency segment as the third carrier frequency value; The first carrier frequency value, the second carrier frequency value and the third carrier frequency value are combined to obtain the carrier set.

7. The method according to claim 3, characterized in that The step of performing overlapping region merging processing on the to-be-processed resonance excess frequency range set to obtain a target resonance excess frequency range set includes: Selecting two resonance super-amplitude frequency ranges from the set of resonance super-amplitude frequency ranges to be processed; If there is a frequency overlap region between the two resonance super-amplitude frequency ranges, the two resonance super-amplitude frequency ranges are merged to obtain the target resonance super-amplitude frequency range set.

8. The method according to claim 3, characterized in that The first carrier frequency adjustment process is performed according to the first carrier frequency value, the second carrier frequency value and the target resonance over-amplitude frequency range to obtain a first frequency conversion control result, including: Setting the carrier of the frequency conversion module to the first carrier frequency value; When the frequency value of the frequency conversion module rises to the minimum value in the target resonance excess frequency range, the carrier of the frequency conversion module is updated to the second carrier frequency value, so that the frequency value of the frequency conversion module decreases to a first decrease frequency value, and the first decrease frequency value is less than the minimum value in the target resonance excess frequency range; Calculating a target frequency value according to a maximum value in the target resonance super-amplitude frequency range and a preset frequency difference; When the frequency value of the frequency conversion module rises to the target frequency value, updating the carrier of the frequency conversion module to the first carrier frequency value; The first frequency conversion control result is generated according to the first judgment result of the vibration detection module.

9. The method according to claim 8, characterized in that The second carrier frequency adjustment process is performed according to the first carrier frequency value, the third carrier frequency value and the target resonance over-amplitude frequency range to obtain a second frequency conversion control result, including: Setting the carrier of the frequency conversion module to the first carrier frequency value; When the frequency value of the frequency conversion module rises to the minimum value in the target resonance excess frequency range, the carrier of the frequency conversion module is updated to the third carrier frequency value, so that the frequency value of the frequency conversion module decreases to a second decrease frequency value, and the second decrease frequency value is less than the minimum value in the target resonance excess frequency range; When the frequency value of the frequency conversion module rises to the target frequency value, updating the carrier of the frequency conversion module to the first carrier frequency value; The second frequency conversion control result is generated according to the second judgment result of the vibration detection module.

10. A frequency conversion control device, characterized in that: include: The first module is used to set the carrier segment set and the single operation cycle frequency conversion strategy; A second module is used to set a carrier set according to the carrier segment set, where the carrier set includes a first carrier frequency value, a second carrier frequency value, and a third carrier frequency value, where the first carrier frequency value is less than the second carrier frequency value, and the second carrier frequency value is less than the third carrier frequency value; The third module is used to perform resonance over-amplitude detection on the small tube assembly through the vibration detection module according to the single operation cycle frequency conversion strategy to obtain a set of resonance over-amplitude frequency ranges to be processed; A fourth module is used to merge overlapping regions of the to-be-processed resonance excess frequency range set to obtain a target resonance excess frequency range set; A fifth module is used to select a resonance super-amplitude frequency range from the target resonance super-amplitude frequency range set as the target resonance super-amplitude frequency range; A sixth module is used to perform a first carrier frequency adjustment process according to the first carrier frequency value, the second carrier frequency value and the target resonance over-amplitude frequency range to obtain a first frequency conversion control result; The seventh module is used to perform a second carrier frequency adjustment process according to the first carrier frequency value, the third carrier frequency value and the target resonance excess frequency range to obtain a second frequency conversion control result if the first frequency conversion control result shows that resonance excess frequency still exists.

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