Ozone frequency converter output voltage control method and related device

Abstract

The invention discloses an ozone frequency converter output voltage control method and a related device. The temperature rise of an IGBT (Insulated Gate Bipolar Translator) is reduced. The method comprises the following steps: acquiring a given value VACset; vACset is a given value of the peak value of the load voltage; under the condition that the duty ratio of the output voltage of the ozone frequency converter is assumed to be constant at a preset value, direct-current voltage VDCset required for achieving VACset is determined; judging whether the VDCset is lower than a lower limit value or not; if not, controlling the duty ratio to be constant at the preset value, and performing closed-loop regulation on the direct-current voltage until the deviation between the direct-current voltage and the VDCset is reduced to be within a preset range; if yes, under the condition that it is assumed that the direct-current voltage is constant at the lower limit value, the duty ratio Dset needed for achieving VACset is determined; and controlling the direct-current voltage to be constant at the lower limit value, and performing closed-loop adjustment on the duty ratio until the deviation between the duty ratio and the Dset is reduced to be within a preset range.

Description

Technical Field

[0001] The present application relates to the field of power electronics technology, and in particular to an ozone inverter output voltage control method and related devices. Background Art

[0002] The ozone inverter is responsible for converting the input AC power into high-frequency AC power suitable for the operation of the ozone generator. By precisely controlling the output voltage, current and frequency of the ozone inverter, the ozone generation process can be optimized and the ozone output and purity can be increased.

[0003] like Figure 1 As shown, the ozone inverter is mainly composed of two parts: a rectifier circuit and an inverter circuit. The rectifier circuit is responsible for converting the input AC power into DC power, while the inverter circuit further converts the DC power into high-frequency AC power. The high-frequency AC power output by the ozone inverter is further processed and converted by the back-end circuit of the ozone inverter, and finally output to the ozone generator to drive the discharge tube of the ozone generator to produce ozone.

[0004] like Figure 2 As shown ( Figure 2 V out ,I out Respectively represent the output voltage and output current of the ozone inverter, ωt represents the phase), the waveform of the output voltage of the ozone inverter is usually a rectangular wave, the waveform of the output current of the ozone inverter is usually a sine wave, the waveform of the output voltage of the back-end circuit of the ozone inverter (also called the load voltage) is usually a sine wave, and the peak value of the load voltage is positively correlated with the high level value of the output voltage of the ozone inverter.

[0005] The traditional control method of the output voltage of the ozone inverter is: the host computer sends a given value (i.e., target value) to the ozone inverter; the given value is, for example, the given value of the peak value of the load voltage; after receiving the given value, the ozone inverter first converts it into the target duty cycle of the output voltage of the ozone inverter (the duty cycle refers to the ratio of the time that the signal is at a high level to the entire cycle time in one cycle), and then changes the output voltage of the ozone inverter by closed-loop adjustment of the duty cycle of the output voltage of the ozone inverter while keeping the DC voltage in the ozone inverter (i.e., the output voltage of the rectifier circuit) unchanged, thereby changing the peak value of the load voltage to reach the given value.

[0006] Under this conventional control method, when the given value of the peak value of the load voltage decreases, in order to make the peak value of the load voltage reach its given value, the duty cycle of the output voltage of the ozone inverter must be reduced. This is because: when the DC voltage in the ozone inverter is fixed, the peak value of the load voltage is positively correlated with the duty cycle of the output voltage of the ozone inverter. Therefore, by reducing the duty cycle of the output voltage of the ozone inverter, the output voltage of the ozone inverter can be reduced, thereby reducing the peak value of the load voltage.

[0007] However, by Figure 2 It can be seen that when the duty cycle of the ozone inverter output voltage decreases, the rectangular wave edge (including the rising edge and the falling edge) of the ozone inverter output voltage will tend to coincide with the sinusoidal wave peak of the ozone inverter output current. Then, under the condition of a lower duty cycle, the rectangular wave edge of the ozone inverter output voltage will appear at a position where the amplitude of the ozone inverter output current is larger. At this time, the IGBT (Insulated Gate Bipolar Transistor) in the inverter circuit will switch at the moment when the ozone inverter output current is larger, which will cause the switching loss of the IGBT to increase significantly, and then cause the temperature of the IGBT to rise significantly. Summary of the invention

[0008] In view of the above problems, the present application provides an ozone inverter output voltage control method and related devices to reduce the temperature rise of IGBT. The specific scheme is as follows:

[0009] The first aspect of the present application provides an ozone inverter output voltage control method, comprising:

[0010] Get the given value V AC_set ; V AC_set is a given value of the peak value of the load voltage, or is a given value of the high level value of the output voltage of the ozone inverter;

[0011] Under the assumption that the duty cycle of the ozone inverter output voltage is constant at a preset value, determine the value of V AC_set The required DC voltage V in the ozone inverter DC_set ;

[0012] Judge V DC_set Is it lower than the lower limit of the DC voltage in the ozone inverter?

[0013] If not, the duty cycle of the ozone inverter output voltage is controlled to be constant at the preset value, and the DC voltage in the ozone inverter is closed-loop regulated until it is equal to V DC_set The deviation is reduced to the preset range;

[0014] If so, under the assumption that the DC voltage in the ozone inverter is constant at the lower limit value, determine whether V AC_set The required duty cycle D of the ozone inverter output voltage set ; Control the DC voltage in the ozone inverter to be constant at the lower limit value, and perform closed-loop adjustment on the duty cycle of the ozone inverter output voltage until it is consistent with D set The deviation is reduced to the preset range.

[0015] In one possible implementation, it is determined that V AC_set The required DC voltage V in the ozone inverter DC_set , including: using a table lookup method to determine the V AC_set The required DC voltage V in the ozone inverter DC_set .

[0016] In one possible implementation, it is determined that V AC_set The required duty cycle D of the ozone inverter output voltage set , including: using a table lookup method to determine the V AC_set The required duty cycle D of the ozone inverter output voltage set .

[0017] A second aspect of the present application provides an ozone inverter output voltage control device, comprising:

[0018] Acquisition unit, used to obtain a given value V AC_set ; V AC_set is a given value of the peak value of the load voltage, or is a given value of the high level value of the output voltage of the ozone inverter;

[0019] The first determining unit is used to determine whether V AC_set The required DC voltage V in the ozone inverter DC_set ;

[0020] Judgment unit, used to judge V DC_set Is it lower than the lower limit of the DC voltage in the ozone inverter?

[0021] The first adjustment unit is used to determine the V obtained by the determination unit. DC_set When the duty cycle of the ozone inverter output voltage is not lower than the lower limit, the duty cycle of the ozone inverter output voltage is controlled to be constant at the preset value, and the DC voltage in the ozone inverter is closed-loop regulated until it is consistent with V DC_set The deviation is reduced to the preset range;

[0022] The second determining unit is used to determine the V obtained by the determining unit. DC_setWhen the DC voltage in the ozone inverter is lower than the lower limit, it is determined that V AC_set The required duty cycle D of the ozone inverter output voltage set ;

[0023] The second regulating unit is used to control the DC voltage in the ozone inverter to be constant at the lower limit value, and to perform closed-loop regulation on the duty cycle of the output voltage of the ozone inverter until it is consistent with D set The deviation is reduced to the preset range.

[0024] In a possible implementation, the first determining unit is specifically configured to: assume that the duty cycle of the output voltage of the ozone inverter is constant at a preset value, and use a table lookup method to determine the value of V AC_set The DC voltage V required in the ozone inverter DC_set .

[0025] In a possible implementation, the second determining unit is specifically configured to: DC_set When the DC voltage in the ozone inverter is lower than the lower limit, the table lookup method is used to determine the value of V AC_set The required duty cycle D of the ozone inverter output voltage set .

[0026] The third aspect of the present application provides a computer program product, including computer-readable instructions. When the computer-readable instructions are executed on the control circuit of the ozone inverter, the control circuit implements the ozone inverter output voltage control method of the first aspect or any implementation method of the first aspect.

[0027] A fourth aspect of the present application provides an ozone frequency converter, wherein a control circuit thereof includes at least one processor and a memory connected to the processor, wherein:

[0028] The memory is used to store computer programs;

[0029] The processor is used to execute the computer program so that the control circuit can implement the ozone inverter output voltage control method of the first aspect or any implementation of the first aspect.

[0030] A fifth aspect of the present application provides an ozone system, including an ozone inverter, an ozone inverter back-end circuit and an ozone generator, wherein the output end of the ozone inverter is connected to the ozone generator via the ozone inverter back-end circuit, wherein the ozone inverter is the ozone inverter output voltage control method of the fourth aspect above.

[0031] In a sixth aspect, the present application provides a computer storage medium, which carries one or more computer programs. When the one or more computer programs are executed by the control circuit of the ozone inverter, the control circuit can implement the ozone inverter output voltage control method of the first aspect or any implementation method of the first aspect.

[0032] By means of the above technical solution, the ozone inverter output voltage control method provided in the present application realizes the control of the output voltage of the ozone inverter at a given value V AC_set In the process of changing from high to low, the output voltage of the ozone inverter is first reduced by keeping the duty cycle of the output voltage of the ozone inverter at a relatively large value and reducing the DC voltage in the ozone inverter; when the DC voltage in the ozone inverter drops to the lower limit value V DC_min When the duty cycle of the ozone inverter output voltage is reduced, the ozone inverter output voltage is further reduced; thus ensuring that the given value V AC_set During the change from high to low, the ozone inverter can stay in a higher duty cycle range for a longer time, thereby reducing the switching loss of the IGBT and lowering the temperature rise of the IGBT. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and the originals and elements are not necessarily drawn to scale.

[0034] Figure 1 A schematic diagram of the structure of an ozone frequency converter provided in this application;

[0035] Figure 2 Output voltage and current waveform diagram of an ozone inverter provided in this application;

[0036] Figure 3 A flow chart of an ozone inverter output voltage control method provided in this application;

[0037] Figure 4 A schematic diagram of the structure of an ozone inverter output voltage control device provided in this application. DETAILED DESCRIPTION

[0038] It is known that when the duty cycle of the ozone inverter output voltage decreases, the rectangular wave edge of the ozone inverter output voltage will tend to coincide with the sinusoidal wave peak of the ozone inverter output current. Then, under the condition of a lower duty cycle, the rectangular wave edge of the ozone inverter output voltage will appear at a position where the amplitude of the ozone inverter output current is larger. At this time, the IGBT in the inverter circuit of the ozone inverter will perform switching action at the moment when the ozone inverter output current is larger, which will cause the switching loss of the IGBT to increase significantly (the switching loss of the IGBT is related to the current value at the moment when the IGBT is turned on and off. The larger the current value at the moment when the IGBT is turned on and off, the greater the switching loss of the IGBT and the higher the temperature rise of the IGBT), which in turn causes a higher temperature rise of the IGBT.

[0039] In order to reduce the temperature rise of IGBT, the embodiment of the present application discloses an ozone inverter output voltage control method. Compared with the traditional control method, the embodiment of the present application changes the output voltage of the ozone inverter by jointly adjusting the DC voltage in the ozone inverter and the duty cycle of the ozone inverter output voltage; the joint adjustment scheme ensures that the ozone inverter can remain in a higher duty cycle range for a longer time, thereby reducing the switching loss of the IGBT and further reducing the temperature rise of the IGBT.

[0040] In conjunction with the accompanying drawings, an ozone inverter output voltage control method provided by an embodiment of the present application is described in detail below. A person skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solution provided by the embodiment of the present application is also applicable to similar technical problems.

[0041] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and need not be used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, which is only to describe the distinction mode adopted by the objects of the same attributes when describing in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0042] See also Figure 3 , an ozone inverter output voltage control method provided in an embodiment of the present application includes:

[0043] Step S01: Get the given value V AC_set , then enter step S02; V AC_set It is the given value of the peak value of the load voltage, or the given value of the high level value of the ozone inverter output voltage.

[0044] Specifically, the ozone inverter includes a main circuit and a control circuit; the main circuit is the core part of the ozone inverter, responsible for the transmission and conversion of electrical energy; the control circuit, as the "brain" of the ozone inverter, is responsible for receiving signals from sensors or external devices, and generating control instructions based on these signals and preset control strategies. These control instructions are then sent to the main circuit to achieve precise adjustment of the operating status of the ozone generator.

[0045] In the ozone inverter output voltage control link, the host computer sends a given value V AC_set To the control circuit of the ozone inverter. V AC_set It can be a given value of the peak value of the load voltage, or a given value of the high level value of the output voltage of the ozone inverter (the peak value of the load voltage is positively correlated with the high level value of the output voltage of the ozone inverter, so if the given value of the peak value of the load voltage is known, the given value of the high level value of the output voltage of the ozone inverter can be calculated; conversely, if the given value of the high level value of the output voltage of the ozone inverter is known, the given value of the peak value of the load voltage can also be calculated). The given value V AC_set It is usually determined based on the needs of the ozone generator and process parameters to ensure ozone generation efficiency and stability.

[0046] Step S02: Under the assumption that the duty cycle of the ozone inverter output voltage is constant at a preset value, determine whether V AC_set The DC voltage V required in the ozone inverter DC_set , then enter step S03.

[0047] Specifically, the duty cycle of the ozone inverter output voltage, the high level value of the ozone inverter output voltage (or the peak value of the load voltage), and the DC voltage in the ozone inverter are closely related. When the duty cycle of the ozone inverter output voltage is constant, the DC voltage in the ozone inverter is positively correlated with the high level value of the ozone inverter output voltage (or the peak value of the load voltage). Therefore, when the duty cycle of the ozone inverter output voltage is given, it is possible to uniquely determine the DC voltage that reaches the given value V AC_set Required DC voltage V DC_set .

[0048] In one possible implementation, according to a given duty cycle and a given value V AC_set Determine the required DC voltage V DC_setWhen the value is , it can be determined by table lookup. Table lookup is a non-numerical calculation method that uses pre-calculated or measured data to compile a table, and then finds the final required result by looking up the table according to the value of the measured parameter or the intermediate result. Table lookup is based on the assumption that the results of certain calculations or search processes can be pre-calculated and stored for quick retrieval when needed. This method avoids repeated calculations and improves the efficiency of the program.

[0049] Step S03: Determine V DC_set Is it lower than the lower limit value V of the DC voltage in the ozone inverter? DC_min If not (V DC_set ≥V DC_min ), go to step S04; if (that is, V DC_set <V DC_min ), go to step S05.

[0050] Step S04: Control the duty cycle of the ozone inverter output voltage to be constant at the preset value, and perform closed-loop regulation on the DC voltage in the ozone inverter until it is equal to V DC_set The deviation is reduced to the preset range, and this round of control ends.

[0051] Specifically, the DC voltage in the ozone inverter has a lower limit value V DC_min , this lower limit V DC_min It is set to ensure the normal operation of the ozone inverter. DC_set ≥V DC_min In the embodiment of the present application, the duty cycle of the output voltage of the ozone inverter is kept unchanged at a preset value, and the high level value of the output voltage of the ozone inverter is changed by closed-loop regulating the DC voltage in the ozone inverter (the peak value of the load voltage is also changed at the same time), so that the corresponding voltage reaches or substantially reaches the given value V AC_set The larger the preset value is, the higher the temperature rise of the IGBT is, so the preset value needs to be a larger value (for example, 95%) so that the temperature rise of the IGBT can meet the requirements.

[0052] The DC voltage in the ozone inverter is closed-loop regulated until it is consistent with V DC_set The deviation is reduced to the preset range, that is: DC_set As the given value of the closed-loop controller, the actual DC voltage in the ozone inverter is used as the feedback value of the closed-loop controller. The closed-loop controller adjusts the control amount according to the deviation between the given value and the feedback value until the deviation is reduced to an acceptable range. Assume that V AC_set is a given value of the peak value of the load voltage, then when the deviation is reduced to an acceptable range, the actual value of the peak value of the load voltage will reach or substantially reach V AC_set ; Assume V AC_setis a given value of the high level value of the ozone inverter output voltage. When the deviation is reduced to an acceptable range, the actual value of the high level value of the ozone inverter output voltage reaches or substantially reaches V AC_set .

[0053] Step S05: Assuming that the DC voltage in the ozone inverter is constant at the lower limit value V DC_min Under the condition of V AC_set The required duty cycle D of the ozone inverter output voltage set ; Control the DC voltage in the ozone inverter to be constant at the lower limit value V DC_min , and close the loop to adjust the duty cycle of the ozone inverter output voltage until it is consistent with D set The deviation is reduced to the preset range, and this round of control ends.

[0054] Specifically, since the DC voltage in the ozone inverter has a lower limit value V DC_min , so when V DC_set <V DC_min At this time, the scheme shown in step S04 can no longer be used to change the output voltage of the ozone inverter. At this time, the embodiment of the present application keeps the DC voltage in the ozone inverter unchanged, and changes the high level value of the ozone inverter output voltage (the peak value of the load voltage also changes at the same time) by adjusting the duty cycle of the ozone inverter output voltage in a closed loop, so that the corresponding voltage reaches or substantially reaches the given value V AC_set .

[0055] Among them, the duty cycle of the ozone inverter output voltage is closed-loop adjusted until it is consistent with D set The deviation is reduced to the preset range, that is: set As the given value of the closed-loop controller, the actual duty cycle of the ozone inverter output voltage is used as the feedback value of the closed-loop controller. The closed-loop controller adjusts the PWM (Pulse Width Modulation) signal received by the ozone inverter according to the deviation between the given value and the feedback value until the deviation is reduced to an acceptable range. Assume that V AC_set is a given value of the peak value of the load voltage, then when the deviation is reduced to an acceptable range, the actual value of the peak value of the load voltage reaches or substantially reaches V AC_set ; Assume V AC_set is a given value of the high level value of the ozone inverter output voltage. When the deviation is reduced to an acceptable range, the actual value of the high level value of the ozone inverter output voltage reaches or substantially reaches V AC_set .

[0056] And, when the given value V AC_setWhen the DC voltage in the ozone inverter is lower, the duty cycle of the ozone inverter output voltage should be set higher. DC_set <V DC_min In order to achieve a higher duty cycle output, the DC voltage in the ozone inverter is set and kept constant at the lower limit value V DC_min .

[0057] In a possible implementation, according to a given DC voltage and a given value V AC_set Determine the required duty cycle D set When the number is , it can be determined by table lookup to avoid repeated calculations and improve the efficiency of the program.

[0058] In summary, the embodiment of the present application realizes that at a given value V AC_set In the process of changing from high to low, the output voltage of the ozone inverter is first reduced by keeping the duty cycle of the output voltage of the ozone inverter at a relatively large value and reducing the DC voltage in the ozone inverter; when the DC voltage in the ozone inverter drops to the lower limit value V DC_min When the duty cycle of the ozone inverter output voltage is reduced, the ozone inverter output voltage is further reduced; thus ensuring that the given value V AC_set During the change from high to low, the ozone inverter can maintain a larger output voltage duty cycle for a longer time, thereby reducing the switching loss of the IGBT and reducing the temperature rise of the IGBT.

[0059] Corresponding to the above method embodiment, the present application embodiment also provides an ozone inverter output voltage control device, see Figure 4 , the device comprises: an acquisition unit 1, a first determination unit 2, a judgment unit 3, a first adjustment unit 4, a second determination unit 5 and a second adjustment unit 6;

[0060] Among them, the acquisition unit 1 is used to obtain the given value V AC_set ; V AC_set is a given value of the peak value of the load voltage, or is a given value of the high level value of the output voltage of the ozone inverter;

[0061] The first determining unit 2 is used to determine whether the duty cycle of the output voltage of the ozone inverter is constant at a preset value. AC_set The DC voltage V required in the ozone inverter DC_set ;

[0062] Judgment unit 3, used to judge V DC_set Is it lower than the lower limit of the DC voltage in the ozone inverter?

[0063] The first adjustment unit 4 is used to determine the value V obtained by the determination unit 3. DC_setWhen the duty cycle of the ozone inverter output voltage is not lower than the lower limit, the duty cycle of the ozone inverter output voltage is controlled to be constant at the preset value, and the DC voltage in the ozone inverter is closed-loop regulated until it is consistent with V DC_set The deviation is reduced to the preset range;

[0064] The second determining unit 5 is used to determine the V obtained by the determining unit 3. DC_set When the DC voltage in the ozone inverter is lower than the lower limit, it is determined that V AC_set The required duty cycle D of the ozone inverter output voltage set ;

[0065] The second regulating unit 6 is used to control the DC voltage in the ozone inverter to be constant at the lower limit value, and to perform closed-loop regulation on the duty cycle of the output voltage of the ozone inverter until it is equal to D set The deviation is reduced to the preset range.

[0066] In a possible implementation, the first determination unit 2 is specifically configured to: assume that the duty cycle of the ozone inverter output voltage is constant at a preset value, and use a table lookup method to determine the value of V AC_set The DC voltage V required in the ozone inverter DC_set .

[0067] In a possible implementation, the second determining unit 5 is specifically configured to: after the determining unit 3 determines that V DC_set When the DC voltage in the ozone inverter is lower than the lower limit, the table lookup method is used to determine the value of V AC_set The required duty cycle D of the ozone inverter output voltage set .

[0068] An embodiment of the present application also provides a computer program product, including computer-readable instructions. When the computer-readable instructions are executed on a control circuit of an ozone inverter, the control circuit implements any of the ozone inverter output voltage control methods provided above.

[0069] The embodiment of the present application further provides an ozone frequency converter, comprising a main circuit and a control circuit, wherein the control circuit comprises at least one processor and a memory connected to the processor, wherein:

[0070] The memory is used to store computer programs;

[0071] The processor is used to execute the computer program so that the control circuit can implement any one of the ozone inverter output voltage control methods provided above.

[0072] An embodiment of the present application also provides an ozone system, including an ozone converter, an ozone converter back-end circuit and an ozone generator, wherein the output end of the ozone converter is connected to the ozone generator via the ozone converter back-end circuit, wherein the ozone converter is any one of the ozone converters provided above.

[0073] An embodiment of the present application also provides a computer storage medium, which carries one or more computer programs. When the one or more computer programs are executed by the control circuit of the ozone inverter, the control circuit can implement any one of the ozone inverter output voltage control methods provided above.

[0074] It should also be noted that the device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. In addition, in the drawings of the device embodiments provided by the present application, the connection relationship between the modules indicates that there is a communication connection between them, which may be specifically implemented as one or more communication buses or signal lines.

[0075] Through the description of the above implementation methods, the technicians in the relevant field can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course, it can also be implemented by special hardware including special integrated circuits, special CPUs, special memories, special components, etc. In general, all functions completed by computer programs can be easily implemented by corresponding hardware, and the specific hardware structures used to implement the same function can also be various, such as analog circuits, digital circuits or special circuits. However, for the present application, software program implementation is a better implementation method in more cases. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer floppy disk, a USB flash drive, a mobile hard disk, a ROM (Read-Only Memory), a RAM (Random Access Memory), a disk or an optical disk, etc., including a number of instructions to enable a computer device (which can be a personal computer, a training device, or a network device, etc.) to execute the methods described in each embodiment of the present application.

[0076] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product.

[0077] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, a computer, a training device, or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL, Digital Subscriber Line)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, training device, or data center. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device, a data center, etc. that includes one or more available media integrations. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)), etc.

[0078] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other and will not be repeated. For the ozone inverter output voltage control device, computer program product, ozone inverter, ozone system, and computer storage medium disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0079] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the embodiments of the present application. Therefore, the embodiments of the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling the output voltage of an ozone inverter, characterized in that: include: Get the given value V AC_set ; V AC_set is a given value of the peak value of the load voltage, or is a given value of the high level value of the output voltage of the ozone inverter; Under the assumption that the duty cycle of the ozone inverter output voltage is constant at a preset value, determine the value of V AC_set The required DC voltage V in the ozone inverter DC_set ; Judge V DC_set Is it lower than the lower limit of the DC voltage in the ozone inverter? If not, the duty cycle of the ozone inverter output voltage is controlled to be constant at the preset value, and the DC voltage in the ozone inverter is closed-loop regulated until it is consistent with V DC_set The deviation is reduced to the preset range; If so, assuming that the DC voltage in the ozone inverter is constant at the lower limit value, determine whether V AC_set The required duty cycle D of the ozone inverter output voltage set ; Control the DC voltage in the ozone inverter to be constant at the lower limit value, and perform closed-loop adjustment on the duty cycle of the ozone inverter output voltage until it is consistent with D set The deviation is reduced to the preset range.

2. The ozone inverter output voltage control method according to claim 1, characterized in that: Make sure to reach V AC_set The required DC voltage V in the ozone inverter DC_set , including: using a table lookup method to determine the V AC_set The required DC voltage V in the ozone inverter DC_set .

3. The ozone inverter output voltage control method according to claim 1 or 2, characterized in that: Make sure to reach V AC_set The required duty cycle D of the ozone inverter output voltage set , including: using a table lookup method to determine the V AC_set The required duty cycle D of the ozone inverter output voltage set .

4. An ozone inverter output voltage control device, characterized in that: include: Acquisition unit, used to obtain a given value V AC_set ; V AC_set is a given value of the peak value of the load voltage, or is a given value of the high level value of the output voltage of the ozone inverter; The first determining unit is used to determine whether V AC_set The required DC voltage V in the ozone inverter DC_set ; Judgment unit, used to judge V DC_set Is it lower than the lower limit of the DC voltage in the ozone inverter? The first adjustment unit is used to determine the V obtained by the determination unit. DC_set When the duty cycle of the ozone inverter output voltage is not lower than the lower limit, the duty cycle of the ozone inverter output voltage is controlled to be constant at the preset value, and the DC voltage in the ozone inverter is closed-loop regulated until it is consistent with V DC_set The deviation is reduced to the preset range; The second determining unit is used to determine the V obtained by the determining unit. DC_set When the DC voltage in the ozone inverter is lower than the lower limit, it is determined that V AC_set The required duty cycle D of the ozone inverter output voltage set ; The second regulating unit is used to control the DC voltage in the ozone inverter to be constant at the lower limit value, and to perform closed-loop regulation on the duty cycle of the output voltage of the ozone inverter until it is consistent with D set The deviation is reduced to the preset range.

5. A computer program product, characterized in that It comprises computer-readable instructions. When the computer-readable instructions are executed on the control circuit of the ozone inverter, the control circuit implements the output voltage control method of the ozone inverter as claimed in any one of claims 1 to 3.

6. An ozone frequency converter, characterized in that: The control circuit thereof includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program so that the control circuit can implement the ozone inverter output voltage control method as described in any one of claims 1 to 3.

7. An ozone system, comprising an ozone frequency converter, a back-end circuit of the ozone frequency converter and an ozone generator, wherein the output end of the ozone frequency converter is connected to the ozone generator via the back-end circuit of the ozone frequency converter, characterized in that: The ozone frequency converter is the ozone frequency converter as claimed in claim 6.

8. A computer storage medium, characterized in that: The storage medium carries one or more computer programs. When the one or more computer programs are executed by the control circuit of the ozone inverter, the control circuit can implement the ozone inverter output voltage control method as described in any one of claims 1 to 3.

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