CN113364318B - Output control method, device, equipment and medium for inverter driving inductive load - Google Patents
Output control method, device, equipment and medium for inverter driving inductive load Download PDFInfo
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- CN113364318B CN113364318B CN202110660837.9A CN202110660837A CN113364318B CN 113364318 B CN113364318 B CN 113364318B CN 202110660837 A CN202110660837 A CN 202110660837A CN 113364318 B CN113364318 B CN 113364318B
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- 230000001939 inductive effect Effects 0.000 title claims abstract description 72
- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000005070 sampling Methods 0.000 claims abstract description 79
- 238000004590 computer program Methods 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 238000004146 energy storage Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The application discloses an output control method, an output control device, electronic equipment and a computer readable storage medium for driving an inductive load by an inverter, wherein the method comprises the following steps: acquiring an output voltage sampling value and an output current sampling value of an inverter in real time; determining a fuzzy PI control mode adopting corresponding control parameters based on the output current sampling value; based on the difference value between the given value of the output voltage of the inverter and the sampling value of the output voltage, the fuzzy PI control type is adopted to calculate and output the control quantity to the inverter, so that the output voltage of the inverter is reduced at the moment of starting the inductive load, and the output current of the inverter is in the output current limiting range and meets the starting current requirement of the inductive load under the current input voltage condition. According to the method, the sampling value of the output current is used for participating in the closed-loop regulation of the output voltage of the inverter, so that the output current of the inverter can meet the starting current requirement of the inductive load within the limit range of the output capacity of the inverter, and the load capacity of the inverter is improved.
Description
Technical Field
The present invention relates to the field of power electronics, and in particular, to an output control method and apparatus for driving an inductive load by using an inverter, an electronic device, and a computer readable storage medium.
Background
Inverters, particularly energy storage inverters, may be used to drive load operation in off-grid mode. The energy storage inverter is an inverter product internally provided with a storage battery, and can convert the direct current stored by the storage battery into the alternating current of the commercial power for load use when the commercial power fails by converting the alternating current of the commercial power into the direct current and storing the direct current in the storage battery.
However, for some inductive loads, such as motor loads, the starting current required at the moment of starting is larger and is generally 5-7 times of the normal working current, so that even if the rated load output power of the inverter is larger than the power required by the normal working of the motor, the motor load at the moment of starting is difficult to drive. In view of this, it has been a great need for a person skilled in the art to provide a solution to the above-mentioned technical problems.
Disclosure of Invention
The invention aims to provide an output control method, an output control device, electronic equipment and a computer readable storage medium for driving an inductive load by an inverter, so as to effectively adjust the load carrying capacity of the inverter during off-grid operation and help to realize the starting of the inductive load with excessive instant starting current.
In order to solve the above technical problems, on the one hand, the present application discloses an output control method for driving an inductive load by an inverter, including:
acquiring an output voltage sampling value and an output current sampling value of the inverter in real time;
determining a fuzzy PI control mode adopting corresponding control parameters based on the output current sampling value;
based on the difference value between the given value of the output voltage of the inverter and the sampling value of the output voltage, calculating and outputting a control quantity to the inverter by adopting the fuzzy PI control mode, so that the output voltage of the inverter is reduced at the moment of starting the inductive load, and the output current of the inverter is in the output current limiting range and meets the starting current requirement of the inductive load under the current input voltage condition.
Optionally, the determining, based on the output current sampling value, a fuzzy PI control formula using corresponding control parameters includes:
and selecting fuzzy PI control modes adopting corresponding control parameters in a segmented mode according to the size range of the output current sampling value.
Optionally, after the calculating and outputting the control amount to the inverter by using the fuzzy PI control method, the method further includes:
judging whether the sampling value of the output voltage of the inverter exceeds a preset safety voltage range or not;
if yes, the operation is finished to carry out inverter protection.
Optionally, after determining that the output voltage sampling value of the inverter does not exceed the preset safe voltage range, the method further includes:
judging whether the sampling value of the output current of the inverter exceeds the maximum working current limit value;
if so, in different time periods when the output current sampling value exceeds the maximum working current limit value, carrying out numerical adjustment of different degrees on the maximum working current limit value so as to carry out current limiting adjustment of different degrees.
Optionally, the adjusting the value of the maximum operating current limit to different degrees in different periods when the value of the output current sampling exceeds the maximum operating current limit includes:
dynamically adjusting the value of the maximum operating current limit value based on the following current adjustment:
wherein I is limit Is the maximum operating current limit value after adjustment; i N Is the original maximum working current limit value; and t is the time length that the sampling value of the output current exceeds the original maximum working current limit value.
Optionally, the method further comprises:
the waveform of the given value of the output voltage of the inverter is a sine waveform subjected to the topping treatment.
In yet another aspect, the present application further discloses an output control apparatus for driving an inductive load by an inverter, including:
the acquisition module is used for acquiring an output voltage sampling value and an output current sampling value of the inverter in real time;
the determining module is used for determining a fuzzy PI control mode adopting corresponding control parameters based on the output current sampling value;
the control module is used for calculating and outputting a control quantity to the inverter by adopting the fuzzy PI control type based on the difference value between the given value of the output voltage of the inverter and the sampling value of the output voltage, so that the output voltage of the inverter is reduced at the moment of starting the inductive load, and the output current of the inverter is in the output current limiting range and meets the starting current requirement of the inductive load under the current input voltage condition.
Optionally, the determining module is specifically configured to:
and selecting fuzzy PI control modes adopting corresponding control parameters in a segmented mode according to the size range of the output current sampling value.
Optionally, the method further comprises:
the judging module is used for judging whether the sampling value of the output voltage of the inverter exceeds a preset safety voltage range or not; if yes, the operation is finished to carry out inverter protection.
Optionally, the method further comprises:
the current limiting and adjusting module is used for judging whether the output current sampling value of the inverter exceeds the maximum working current limit value after the judging module judges that the output voltage sampling value of the inverter does not exceed the preset safety voltage range; if so, in different time periods when the output current sampling value exceeds the maximum working current limit value, carrying out numerical adjustment of different degrees on the maximum working current limit value so as to carry out current limiting adjustment of different degrees.
Optionally, the current limiting adjustment module is specifically configured to:
dynamically adjusting the value of the maximum operating current limit value based on the following current adjustment:
wherein I is limit Is the maximum operating current limit value after adjustment; i N Is the original maximum working current limit value; t is the time length that the sampling value of the output current exceeds the original maximum working current limit value。
Optionally, the waveform of the given value of the output voltage of the inverter is a sine waveform subjected to the topping treatment.
In yet another aspect, the present application also discloses an electronic device, including:
a memory for storing a computer program;
a processor for executing the computer program to implement the steps of any of the inverter-driven inductive load output control methods described above.
In yet another aspect, the present application also discloses a computer readable storage medium having stored therein a computer program which when executed by a processor is configured to implement the steps of any of the inverter-driven inductive load output control methods described above.
The output control method, the device, the electronic equipment and the computer readable storage medium for the inverter driving inductive load have the beneficial effects that: according to the method and the device, the output current sampling value of the inverter is taken as a basis to participate in adjusting fuzzy PI closed-loop feedback adjustment for the output voltage of the inverter, the output voltage of the inverter can be adjusted and reduced at the moment of starting the inductive load, the output current of the inverter can meet the starting current requirement of the inductive load within the limit range of the output capacity of the inverter, the starting of the inductive load with overlarge starting current is smoothly realized, and the load capacity of the inverter in off-grid operation is effectively improved.
Drawings
In order to more clearly illustrate the prior art and the technical solutions in the embodiments of the present application, the following will briefly describe the drawings that need to be used in the description of the prior art and the embodiments of the present application. Of course, the following figures related to the embodiments of the present application are only some of the embodiments of the present application, and it is obvious to those skilled in the art that other figures can be obtained from the provided figures without any inventive effort, and the obtained other figures also belong to the protection scope of the present application.
Fig. 1 is a graph of a curve waveform at the start of a motor according to an embodiment of the present application;
fig. 2 is a flowchart of an output control method for driving an inductive load by an inverter according to an embodiment of the present disclosure;
fig. 3 is a schematic circuit diagram of an inverter according to an embodiment of the present disclosure;
fig. 4 is a control schematic diagram of an output control method for driving an inductive load by using an inverter according to the present application;
fig. 5 is a graph of a waveform of an inverter driving an inductive load according to an embodiment of the present disclosure;
FIG. 6 is a graph of a truncated sinusoidal waveform according to an embodiment of the present disclosure;
FIG. 7 is a graph of a further exemplary waveform of an inverter driving an inductive load according to an embodiment of the present disclosure;
fig. 8 is a block diagram of an output control device for driving an inductive load by an inverter according to an embodiment of the present application;
fig. 9 is a block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
The core of the application is to provide an output control method, an output control device, electronic equipment and a computer readable storage medium for driving an inductive load by an inverter so as to effectively adjust the load carrying capacity of the inverter during off-grid operation and help to realize the starting of the inductive load with excessive instant starting current.
In order to more clearly and completely describe the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
For inductive loads such as motors, the starting current value at the moment of starting is large and is generally 5-7 times of the proper working current. Referring specifically to fig. 1, the solid line is a voltage waveform, and the dotted line is a start-up current waveform. Therefore, the conventional inverter control method cannot smoothly drive the inductive load to start because the starting current requirement cannot be met. In view of the above, the present application provides an output control scheme for driving an inductive load by an inverter, which can effectively solve the above-mentioned problems.
Referring to fig. 2, an embodiment of the application discloses an output control method for driving an inductive load by an inverter, which mainly includes:
s101: and acquiring an output voltage sampling value and an output current sampling value of the inverter in real time.
S102: and determining a fuzzy PI control mode adopting corresponding control parameters based on the output current sampling value.
S103: based on the difference value between the given value of the output voltage of the inverter and the sampling value of the output voltage, the fuzzy PI control type is adopted to calculate and output the control quantity to the inverter, so that the output voltage of the inverter is reduced at the moment of starting the inductive load, and the output current of the inverter is in the output current limiting range and meets the starting current requirement of the inductive load under the current input voltage condition.
Specifically, referring to fig. 3, the specific circuit structure of the inverter may be referred to, in which switching transistors Q1 to Q4 form a full-bridge inverter circuit, inductors L1 and L2 and capacitor C form a low-pass filter circuit, ve is a dc bus voltage, and u a Is the output voltage of the inverter.
Motors are a very common inductive load, and in the following the motor is taken as an example. In the prior art, if the actual output voltage of the inverter is kept unchanged all the time, the output current of the inverter will not reach the starting current of the motor at the moment of starting the motor, so that the motor cannot be started smoothly.
Therefore, in the technical scheme protected by the application, the actual output current (namely, the output current sampling value) of the inverter obtained through detection is introduced as a feedback quantity, the coefficient value of the fuzzy PI control type is obtained based on current calculation, and the actual output voltage of the inverter is regulated by combining a fuzzy PI control method based on the deviation between the given value of the output voltage of the inverter and the output voltage sampling value.
With particular reference to figure 4 of the drawings,fig. 4 is a control schematic diagram of an output control method for driving an inductive load by using an inverter according to the present application. Wherein u is target For outputting the voltage set value, u a I is the output voltage of the inverter a Is the output current of the inverter.
The PI controller is a linear controller that can feedback-control a proportional and integral of a deviation between a given value and a feedback value by linearly combining the proportional and integral of the deviation to form a control amount. Here, the application specifically adopts a fuzzy PI regulator with convenient use and strong applicability, and of course, those skilled in the art can also adopt a classical PI regulator.
Because the huge starting current will cause larger error between the sampling value of the output voltage and the given value of the output voltage at the moment of starting the motor, the actual output voltage of the inverter is regulated to be smaller at the initial stage of starting the motor under the control action of fuzzy PI, that is, the input voltage of the motor is smaller at the initial stage of starting the motor, and further the starting current required by the motor in the actual input voltage state in the descending process is also reduced. Therefore, the output current of the current inverter can meet the starting current requirement of the motor in the current input voltage state, and the starting of the motor load is smoothly completed.
Then, the output voltage sampling value is reduced by reducing the starting current of the motor, so that deviation is reduced, and the output voltage of the inverter is gradually increased after the motor is started. So, this application can effectively reduce motor start-up time, prolongs the life of motor.
The specific process can be contrasted with reference to fig. 5. As shown in fig. 5, at the moment of starting the motor, the method provided by the application reduces the output voltage of the inverter, and the required starting current is also reduced under the condition that the input voltage of the motor is reduced, so that the output current of the current inverter can reach the starting current of the motor in the current state, and the starting of the motor is smoothly completed.
Therefore, the output control method for driving the inductive load by the inverter provided by the application takes the output current sampling value of the inverter as the basis to participate in adjusting fuzzy PI closed loop feedback adjustment for the output voltage of the inverter, the output voltage of the inverter can be adjusted and reduced at the moment of starting the inductive load, the output current of the inverter can meet the starting current requirement of the inductive load within the limit range of the output capacity of the inverter, the starting of the inductive load with overlarge starting current is smoothly realized, and the load capacity of the inverter during off-grid operation is effectively improved.
As a specific embodiment, the method for controlling the output of the inverter driving inductive load according to the embodiment of the present application determines, based on the output current sampling value, a fuzzy PI control formula using corresponding control parameters, including:
and selecting a fuzzy PI control mode adopting corresponding control parameters in a segmented manner according to the size range of the output current sampling value.
Specifically, considering that different inductive loads may correspond to different power segments, the adjustment requirements are different, so the embodiment specifically adopts a segmented control mode when adjusting the fuzzy PI control mode for the output voltage based on the output current sampling value. Specifically, in this embodiment, a plurality of current limit values c (x) may be preset, and each current interval is set to a corresponding PI control mode, where control parameters in the unused PI control modes are different, including a gain parameter K, a proportional parameter P, and an integral parameter I.
When the output current is sampled value i a When the current value is larger than a certain current limit value c (x), a corresponding current segmentation control mode is entered. On the premise that the current rating limit of the inverter is not exceeded, the actual output voltage of the inverter is increased by adopting different sections of PI control, so that the purposes of enhancing the starting capability and shortening the starting time are achieved, and meanwhile, the problems of overlong starting time, reduced service life of the motor and the like caused by too small starting voltage of the motor are avoided.
For example, at c (2)>i a >In the case of c (1), PI control system using K (1), P (1) and I (1) as coefficients can be adopted; in c (3)>i a >c (2) can adopt PI control type with K (2), P (2) and I (2) as coefficients; at c (x+1)>i a >c (x), PI control using K (x), P (x), I (x) as coefficients can be usedA formula (I); and so on.
As a specific embodiment, the method for controlling the output of the inverter driving inductive load according to the embodiment of the present application further includes, based on the above content:
the waveform of the given value of the output voltage of the inverter is a sine waveform subjected to the topping treatment.
In particular, the maximum operating current of the device may limit the load carrying capability of the inverter. In order to further improve the starting capability, the embodiment can further control the output voltage of the inverter by giving a value u to the output voltage of the inverter at the maximum operating current limited by the device target And (3) performing a truncated process on the waveform to reduce the peak current, so that the actual output voltage of the inverter after feedback adjustment is also the truncated waveform.
In one embodiment, the output voltage of the inverter may be a truncated sine waveform, and the waveform schematic diagram may be specifically referred to in fig. 6, and the waveform expression may be specifically:
wherein V is peak Is the peak voltage; k is an adjustment parameter. By adjusting the K value, waveforms with different shaving degrees can be obtained, and the effective value of current is adjusted, so that the load capacity of different proportions is improved.
As such, the curve waveform of the inverter during the driving of the inductive load can be specifically seen in fig. 7. On the premise of meeting the requirement of a load on a power grid, the starting capability and the instantaneous load carrying capability of the inverter can be enhanced by adjusting the K value to increase the effective voltage value in the power frequency period. The relation between specific load capacity improvement and K value is shown as follows:
when k=2, the load carrying capacity improvement ratio is about 31.51%; when k=4, the load carrying capacity improvement ratio is about 44.51%; when k=8, the load carrying capacity improvement ratio is about 50.82%.
As a specific embodiment, the method for controlling the output of the inverter driving inductive load according to the embodiment of the present application further includes, based on the above, after calculating and outputting the control amount to the inverter by using the fuzzy PI control formula:
judging whether the sampling value of the output voltage of the inverter exceeds a preset safety voltage range or not;
if yes, the operation is finished to carry out inverter protection.
It is easy to understand that in order to ensure the safety of the device, the output voltage of the inverter needs to be ensured within a certain safety range. Therefore, the embodiment also samples and obtains the actual output voltage sampling value of the inverter in real time, and judges whether the actual output voltage sampling value exceeds the preset safe voltage range. And if the current operation mode is exceeded, the current operation mode is exited, and the inverter is prevented from being damaged due to high voltage.
As a specific embodiment, the method for controlling the output of the inverter driving inductive load according to the embodiment of the present application further includes, based on the foregoing, after determining that the output voltage sampling value of the inverter does not exceed the preset safe voltage range:
judging whether the sampling value of the output current of the inverter exceeds the maximum working current limit value;
if so, in different time periods when the output current sampling value exceeds the maximum working current limit value, carrying out numerical adjustment on the maximum working current limit value in different degrees so as to carry out current limiting in different degrees.
Specifically, the rated current of the inverter is set by taking into account the heat loss during steady-state long-time operation, so that a certain margin is usually left from the maximum power limit. Because the motor has the characteristics of large starting current and short maintenance time, the embodiment also provides a dynamic regulation and control scheme aiming at the short-time maximum working current of the inverter, which can allow the rated current limit to be broken through in a short time and improve the load capacity as much as possible under the condition of not damaging devices.
As a specific embodiment, the method for controlling the output of the inverter driving inductive load according to the embodiment of the present application performs numerical adjustment on the maximum operating current limit value to different extents in different time periods when the output current sampling value exceeds the maximum operating current limit value based on the above description, including:
dynamically adjusting the value of the maximum operating current limit based on the following current adjustment:
wherein I is limit Is the maximum operating current limit value after adjustment; i N Is the original maximum working current limit value; and t is the time length that the sampling value of the output current exceeds the original maximum working current limit value.
Referring to fig. 8, an embodiment of the present application discloses an output control device for driving an inductive load by an inverter, which mainly includes:
an acquisition module 201, configured to acquire an output voltage sampling value and an output current sampling value of the inverter in real time;
a determining module 202, configured to determine a fuzzy PI control type using corresponding control parameters based on the output current sampling value;
the control module 203 is configured to calculate and output a control amount to the inverter by using fuzzy PI control based on a difference between an output voltage given value and an output voltage sampling value of the inverter, so that an output voltage of the inverter is reduced at a moment of starting the inductive load, and further an output current of the inverter is within an output current limit range thereof and meets a starting current requirement of the inductive load under a current input voltage condition.
Therefore, the output control device for driving the inductive load by the inverter disclosed by the embodiment of the application takes part in adjusting fuzzy PI closed loop feedback adjustment for the output voltage of the inverter based on the output current sampling value of the inverter, can adjust and reduce the output voltage of the inverter at the moment of starting the inductive load, ensures that the output current of the inverter can meet the starting current requirement of the inductive load within the limit range of the output capacity of the inverter, smoothly realizes the starting of the inductive load with overlarge starting current, and effectively improves the load carrying capacity of the inverter during off-grid operation.
For the specific details of the output control device for driving the inductive load by using the inverter, reference may be made to the foregoing detailed description of the output control method for driving the inductive load by using the inverter, which will not be repeated here.
As a specific embodiment, the determining module 202 is specifically configured to:
and selecting a fuzzy PI control mode adopting corresponding control parameters according to the size range of the output current sampling value.
As a specific embodiment, the output control device for driving an inductive load by using an inverter disclosed in the embodiments of the present application further includes, based on the above description:
the judging module is used for judging whether the sampling value of the output voltage of the inverter exceeds a preset safety voltage range or not; if yes, the operation is finished to carry out inverter protection.
As a specific embodiment, the output control device for driving an inductive load by using an inverter disclosed in the embodiments of the present application further includes, based on the above description:
the current limiting adjusting module is used for judging whether the output current sampling value of the inverter exceeds the maximum working current limit value after the judging module judges that the output voltage sampling value of the inverter does not exceed the preset safety voltage range; if so, in different time periods when the output current sampling value exceeds the maximum working current limit value, carrying out numerical adjustment on the maximum working current limit value in different degrees so as to carry out current limiting adjustment in different degrees.
As a specific embodiment, the output control device for driving an inductive load by using an inverter disclosed in the embodiments of the present application is specifically configured to:
dynamically adjusting the value of the maximum operating current limit based on the following current adjustment:
wherein I is limit Is the maximum operating current limit value after adjustment; i N Is the original maximum working current limit value; and t is the time length that the sampling value of the output current exceeds the original maximum working current limit value.
As a specific embodiment, the output control device for driving an inductive load by using an inverter disclosed in the embodiments of the present application is based on the above description, and the waveform of the given value of the output voltage of the inverter is a sine waveform subjected to the truncated processing.
Referring to fig. 9, an embodiment of the present application discloses an electronic device, including:
a memory 301 for storing a computer program;
a processor 302 for executing the computer program to implement the steps of any of the inverter-driven inductive load output control methods described above.
Further, the embodiments of the present application also disclose a computer readable storage medium having stored therein a computer program which when executed by a processor is configured to implement the steps of any of the inverter-driven inductive load output control methods as described above.
For the specific content of the electronic device and the computer readable storage medium, reference may be made to the foregoing detailed description of the output control method for driving the inductive load by the inverter, which is not repeated herein.
In this application, each embodiment is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the apparatus disclosed in the examples, since it corresponds to the method disclosed in the examples, the description is relatively simple, and the relevant points are referred to in the description of the method section.
It should also be noted that in this document, relational terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The technical scheme provided by the application is described in detail. Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the present application.
Claims (5)
1. An output control method for driving an inductive load by an inverter, comprising:
acquiring an output voltage sampling value and an output current sampling value of the inverter in real time;
selecting fuzzy PI control modes adopting corresponding control parameters in a segmented manner according to the size range of the output current sampling value; the control parameters comprise gain parameters, proportion parameters and integral parameters;
calculating and outputting a control quantity to the inverter by adopting the fuzzy PI control type based on the difference value between the given value of the output voltage of the inverter and the sampling value of the output voltage, so that the output voltage of the inverter is reduced at the moment of starting the inductive load, and the output current of the inverter is in the output current limiting range and meets the starting current requirement of the inductive load under the current input voltage condition;
after the calculating and outputting the control amount to the inverter by using the fuzzy PI control, the method further includes:
judging whether the sampling value of the output voltage of the inverter exceeds a preset safety voltage range or not;
if yes, ending the operation to protect the inverter;
after determining that the output voltage sampling value of the inverter does not exceed the preset safety voltage range, the method further comprises the following steps:
judging whether the sampling value of the output current of the inverter exceeds the maximum working current limit value;
if yes, in different time periods when the output current sampling value exceeds the maximum working current limit value, carrying out numerical adjustment of different degrees on the maximum working current limit value so as to carry out current limiting adjustment of different degrees;
and in different time periods when the output current sampling value exceeds the maximum working current limit value, carrying out numerical adjustment on the maximum working current limit value to different degrees, wherein the numerical adjustment comprises the following steps:
dynamically adjusting the value of the maximum operating current limit value based on the following current adjustment:
wherein I is limit Is the maximum operating current limit value after adjustment; i N Is the original maximum working current limit value; and t is the time length that the sampling value of the output current exceeds the original maximum working current limit value.
2. The output control method according to claim 1, characterized by further comprising:
the waveform of the given value of the output voltage of the inverter is a sine waveform subjected to the topping treatment.
3. An output control device for driving an inductive load by an inverter, comprising:
the acquisition module is used for acquiring an output voltage sampling value and an output current sampling value of the inverter in real time;
the determining module is used for selecting fuzzy PI control modes adopting corresponding control parameters in a segmented manner according to the size range of the output current sampling value; the control parameters comprise gain parameters, proportion parameters and integral parameters;
the control module is used for calculating and outputting a control quantity to the inverter by adopting the fuzzy PI control type based on the difference value between the given value of the output voltage of the inverter and the sampling value of the output voltage so as to enable the output voltage of the inverter to be reduced at the moment of starting the inductive load, and further enable the output current of the inverter to be within the output current limit range and meet the starting current requirement of the inductive load under the current input voltage condition;
after the calculating and outputting the control amount to the inverter by using the fuzzy PI control, the method further includes:
judging whether the sampling value of the output voltage of the inverter exceeds a preset safety voltage range or not;
if yes, ending the operation to protect the inverter;
after determining that the output voltage sampling value of the inverter does not exceed the preset safety voltage range, the method further comprises the following steps:
judging whether the sampling value of the output current of the inverter exceeds the maximum working current limit value;
if yes, in different time periods when the output current sampling value exceeds the maximum working current limit value, carrying out numerical adjustment of different degrees on the maximum working current limit value so as to carry out current limiting adjustment of different degrees;
and in different time periods when the output current sampling value exceeds the maximum working current limit value, carrying out numerical adjustment on the maximum working current limit value to different degrees, wherein the numerical adjustment comprises the following steps:
dynamically adjusting the value of the maximum operating current limit value based on the following current adjustment:
wherein I is limit Is the maximum operating current limit value after adjustment; i N Is the original maximum working current limit value; and t is the time length that the sampling value of the output current exceeds the original maximum working current limit value.
4. An electronic device, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the steps of the method for controlling the output of an inverter driven inductive load according to claim 1 or 2.
5. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored therein a computer program which, when executed by a processor, is adapted to carry out the steps of the method for controlling the output of an inverter-driven inductive load according to claim 1 or 2.
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| CN202110660837.9A CN113364318B (en) | 2021-06-15 | 2021-06-15 | Output control method, device, equipment and medium for inverter driving inductive load |
| PCT/CN2021/101957 WO2022261999A1 (en) | 2021-06-15 | 2021-06-24 | Method and apparatus for controlling output of inverter when driving inductive load, device, and medium |
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| CN202110660837.9A CN113364318B (en) | 2021-06-15 | 2021-06-15 | Output control method, device, equipment and medium for inverter driving inductive load |
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| CN113364318A (en) | 2021-09-07 |
| WO2022261999A1 (en) | 2022-12-22 |
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