CN117792115A - Voltage source type induction heating power supply system, method and storage medium - Google Patents
Voltage source type induction heating power supply system, method and storage medium Download PDFInfo
- Publication number
- CN117792115A CN117792115A CN202410216960.5A CN202410216960A CN117792115A CN 117792115 A CN117792115 A CN 117792115A CN 202410216960 A CN202410216960 A CN 202410216960A CN 117792115 A CN117792115 A CN 117792115A
- Authority
- CN
- China
- Prior art keywords
- output current
- inversion unit
- standby
- nth
- units
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000006698 induction Effects 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000010438 heat treatment Methods 0.000 title claims abstract description 42
- 238000005070 sampling Methods 0.000 claims description 55
- 230000002159 abnormal effect Effects 0.000 claims description 53
- 238000010586 diagram Methods 0.000 claims description 37
- 230000005856 abnormality Effects 0.000 claims description 27
- 238000004590 computer program Methods 0.000 claims description 13
- 238000012937 correction Methods 0.000 abstract description 9
- 230000006870 function Effects 0.000 description 17
- 230000008569 process Effects 0.000 description 10
- 239000004065 semiconductor Substances 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 3
- 229910010271 silicon carbide Inorganic materials 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000012010 growth Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000003698 anagen phase Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- General Induction Heating (AREA)
Abstract
The application provides a voltage source type induction heating power supply system, a method and a storage medium, wherein the system comprises: the input port of rectifying device is connected with the electric wire netting, and the output port is connected inverting device's input port, inverting device's output port is connected induction coil, rectifying device includes: n+1 active power correction units connected in parallel, the inverter device including: m parallel-connected inverter units, the M parallel-connected inverter units comprising: 1 main inverter unit and M-1 standby inverter units.
Description
Technical Field
The application belongs to the technical field of chips, and particularly relates to a voltage source type induction heating power supply system, a voltage source type induction heating power supply method and a storage medium.
Background
The demand for SiC devices has entered a rapid growth phase, and semiconductor companies in China need higher energy production to preempt the market. The higher throughput targets place higher demands on the reliability of the manufacturing equipment used by the domestic semiconductor companies. Both the SIC growth process and the SIC epitaxial growth process require a long high temperature environment. Induction heating power is a key device to maintain a high temperature environment. In the processing process, any abnormal fault shutdown of the power supply can cause the damage to the high-temperature environment, so that the process flow is interrupted, the raw materials are scrapped, and the productivity is reduced.
The existing voltage source type induction heating power supply system consists of a rectifying part, an inversion part and an induction coil, all parts in the existing voltage source type induction heating power supply system are of a single-path cascading structure, a single machine works, once any part in the induction heating power supply system fails, the induction heating power supply system is integrally stopped, no power is output, and the reliability of the whole system is lower.
Disclosure of Invention
The application provides a voltage source type induction heating power supply system, a voltage source type induction heating power supply method and a storage medium.
In a first aspect, the present application provides a voltage source type induction heating power supply system comprising: the input port of rectifying device is connected with the electric wire netting, and the output port is connected inverting device's input port, inverting device's output port is connected induction coil, rectifying device includes: the rectification device is a rectification device with an N+1 backup function and a high power factor rectification function; the inverter device includes: m parallel-connected inverter units, the M parallel-connected inverter units comprising: 1 main inversion unit and M-1 standby inversion units; when the system is in a normal working state, the main inversion unit is in a normal output state, and the M-1 standby inversion units are in a standby state; the M-1 standby inverter units are used for detecting the waveform diagram of the output current of the main inverter unit, performing fault identification on the waveform diagram of the current to obtain an identification result, and if the identification result is that the waveform diagram is abnormal, selecting one inverter unit from the M-1 standby inverter units as the main inverter unit to perform subsequent current output; n, M are integers greater than or equal to 2.
In a second aspect, there is provided a voltage source type induction heating power supply method applied to a voltage source type induction heating power supply system including: the input port of rectifying device is connected with the electric wire netting, and the output port is connected inverting device's input port, inverting device's output port is connected induction coil, rectifying device includes: the rectification device is a rectification device with an N+1 backup function and a high power factor rectification function; the inverter device includes: m parallel-connected inverter units, the M parallel-connected inverter units comprising: 1 main inversion unit and M-1 standby inversion units; the method comprises the following steps: when the system is in a normal working state, the main inversion unit is in a normal output state, and the M-1 standby inversion units are in a standby state; the M-1 standby inverter units detect the waveform diagram of the output current of the main inverter unit, perform fault identification on the waveform diagram of the current to obtain an identification result, and select one inverter unit from the M-1 standby inverter units as the main inverter unit to perform subsequent current output if the identification result is that the waveform diagram is abnormal; n, M are integers greater than or equal to 2.
In a third aspect, the present application provides a computer storage medium storing a computer program for electronic data exchange, wherein the computer program causes a computer to perform part or all of the steps as described in the second aspect of the present application.
The embodiment of the application has the following beneficial effects:
the voltage source type induction heating power supply system of the technical scheme provided by the application comprises: a rectifying device and an inverter device, wherein the rectifying device includes: n+1 active power correction units connected in parallel, the inverter device includes: m inverter units connected in parallel; the input port of the rectifying device is connected with the power grid, the output port of the rectifying device is connected with the input port of the inversion device, and the output port of the inversion device is connected with the induction coil; when the system is in a normal working state, a main inverter unit in M parallel connected inverter units is in a normal output state, and M-1 standby inverter units are in a hot standby state; and each standby inverter unit in the M-1 standby inverter units is used for detecting a waveform diagram of output current, performing fault identification on the waveform diagram of the current to obtain an identification result, and selecting one inverter unit from the M-1 standby inverter units as a main inverter unit to execute subsequent current output if the identification result is that the waveform diagram is abnormal. Therefore, the fault judgment is fast through the waveform diagram, the wave generation of the hot standby inverter unit is fast, the output power of the whole system is almost unchanged, and the heating process is not influenced. The reliability of the inversion part is greatly improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a voltage source type induction heating power supply system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of steps of a method for performing fault recognition on a waveform diagram of a current to obtain a recognition result;
FIG. 3 is a schematic waveform diagram of the ripple threshold and the theoretical output current provided in the present application;
FIG. 4 is a flow chart of a fast fault identification method according to an embodiment of the present application;
fig. 5 is a schematic flow chart of a method for providing a voltage source type induction heating power supply according to an embodiment of the present application.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will clearly and completely describe the technical solution in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, system, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The following description will first be made of the relevant terms that are referred to in this application.
SiC (silicon carbide) is a compound semiconductor material composed of Si (silicon) and C (carbon).
Referring to fig. 1, fig. 1 is a schematic structural diagram of a voltage source type induction heating power supply system provided in the present application, as shown in fig. 1, the voltage source type induction heating power supply system includes: a rectifying device 10 and an inverter device 11, wherein the rectifying device 10 includes: n+1 active power correction units 100 connected in parallel, the rectifying device 10 being a rectifying device having an n+1 backup function and a high power factor rectifying function; the inverter device 11 includes: m inverter units 110 connected in parallel; the input port of the rectifying device 10 is connected with the power grid 13, the output port of the rectifying device 10 is connected with the input port of the inverter device 11, and the output port of the inverter device 11 is connected with the induction coil 14; when the system is in a normal working state, a main inverter unit in M parallel connected inverter units is in a normal output state, and M-1 standby inverter units are in a standby state; and each standby inverter unit in the M-1 standby inverter units is used for detecting the waveform diagram of the output current of the main inverter unit, performing fault identification on the waveform diagram of the current to obtain an identification result, and if the identification result is that the waveform diagram is abnormal, selecting one inverter unit from the M-1 standby inverter units as the main inverter unit to execute subsequent current output.
The N, M is an integer greater than or equal to 2, and in practical applications, the magnitude relationship between N, M may not be limited, i.e., N may be greater than M, or N may be equal to M, or N may be less than M.
Such standby states include, but are not limited to: a sleep backup state or a fast hot backup state.
The voltage source type induction heating power supply system of the technical scheme provided by the application comprises: a rectifying device and an inverter device, wherein the rectifying device includes: n+1 active power correction units connected in parallel, the inverter device includes: m inverter units connected in parallel; the input port of the rectifying device is connected with the power grid, the output port of the rectifying device is connected with the input port of the inversion device, and the output port of the inversion device is connected with the induction coil; when the system is in a normal working state, a main inverter unit in M parallel connected inverter units is in a normal output state, and M-1 standby inverter units are in a hot standby state; and each standby inverter unit in the M-1 standby inverter units is used for detecting a waveform diagram of output current, performing fault identification on the waveform diagram of the current to obtain an identification result, and selecting one inverter unit from the M-1 standby inverter units as a main inverter unit to execute subsequent current output if the identification result is that the waveform diagram is abnormal. Therefore, the fault judgment is fast through the waveform diagram, the wave generation of the hot standby inverter unit is fast, the output power of the whole system is almost unchanged, and the heating process is not influenced. The reliability of the inversion part is greatly improved.
For example, each of the n+1 active power correction units connected in parallel is used for parallel output voltage, so that stable dc bus voltage and output power can be provided for the subsequent stage (the rear part of the inverter device) if only 1 active power correction unit of the n+1 active power correction units is normal.
For example, the foregoing performing fault recognition on the current waveform diagram to obtain the recognition result may specifically include the following steps, as shown in fig. 2, fig. 2 is a schematic step diagram of a method for performing fault recognition on the current waveform diagram to obtain the recognition result, as shown in fig. 2, where the method specifically may include:
step S201, obtaining the output power P of the system set According to I rms =（P set /R load ） 1/2 Calculating the expected amplitude I of the output current rms Wherein R is load Is the equivalent load resistance value of the induction coil.
The induction coil heats the workpiece.
Step S202, the frequency f and the phase theta of the output current of the phase-locked loop of the system are obtained.
Step S203, according to the expected amplitude I of the output current rms Calculating theoretical output current I from frequency f and phase θ out Is a theoretical waveform of (a).
As shown in the formula: i out （t）=1.414×I rms X sin (2×pi×f×t+θ); wherein t is I out Sin represents a sine function.
And step S204, periodically collecting the actual output current of the main inversion unit, extracting the nth actual output current of the nth sampling time, calculating the nth theoretical output current of the nth sampling time, calculating the difference value between the nth actual output current and the nth theoretical output current to obtain the nth difference value, calculating the absolute value of the nth difference value to obtain the nth absolute value, recording an abnormality 1 time if the minimum value in the nth absolute value is larger than a fluctuation threshold value, and determining that the main inversion unit is abnormal and switching the standby inversion unit if the number of continuously recorded abnormalities exceeds an abnormality threshold value.
The nth theoretical output current for calculating the nth sampling time can be calculated by the above formula.
The fluctuation threshold can be set by a user, and can be shown in fig. 3, and fig. 3 is a schematic waveform diagram of the fluctuation threshold and the theoretical output current provided by the application.
The main control chip of the standby inverter unit can realize high-frequency sampling, so that the interval of each sampling time is very short, if the main inverter unit breaks down, the fluctuation of an output circuit is increased, in order to avoid the interference of noise signals, the absolute value of the difference value between the actual output current value of the nth sampling time and the theoretical output current of the nth sampling time is required to be larger than a fluctuation threshold value, the abnormality is recorded for 1 time, if the continuously recorded abnormal times exceed the abnormality threshold value, the main inverter unit is determined to be abnormal, the standby inverter unit is switched, the rapid response of the fault judging time can be ensured, the fault judging period is shortened, the continuously recorded abnormal times exceed the abnormality threshold value, the abnormal times recorded for a single sampling can be well filtered, the influence of noise signals on the abnormal condition judgment can be avoided, the abnormal rapid fault judgment is realized, the rapid fault judgment of the inverter unit can be realized, the rapid thermal backup of the inverter unit is realized, the fluctuation of the output power is very small in the period from the working state of the inverter in the thermal backup state to the starting working state, and the stability of the heating power supply system is further improved.
If M is greater than or equal to 3, the main inversion unit is used for selecting one standby inversion unit from M-1 standby inversion units as a secondary main inversion unit according to a preset rule, and adjusting the state of the secondary main inversion unit into a fast hot backup state, and the states of the remaining M-2 standby inversion units into a sleep backup state; secondary main inversion sheetElement for obtaining output power P of system set According to I rms =（P set /R load ） 1/2 Calculating the expected amplitude I of the output current rms Wherein R is load Equivalent load resistance for the induction coil (i.e., heating the workpiece); acquiring the frequency f and the phase theta of the output current of the phase-locked loop; according to the expected amplitude I of the output current rms Calculating theoretical output current I from frequency f and phase θ out Is a theoretical waveform of (a); periodically collecting actual output current of a main inversion unit, extracting the nth actual output current of the nth sampling time, calculating the nth theoretical output current of the nth sampling time, calculating the difference value between the nth actual output current and the nth theoretical output current to obtain an nth difference value, calculating the absolute value of the nth difference value to obtain an nth absolute value, recording an abnormality 1 time if the minimum value in the nth absolute value is larger than a fluctuation threshold value, and determining that the main inversion unit is abnormal and switching a standby inversion unit if the number of continuously recorded abnormalities exceeds an abnormality threshold value; and the secondary main inversion unit is also used for selecting one standby inversion unit from the remaining M-2 standby inversion units as a secondary main inversion unit according to the preset rule when the main inversion unit is abnormal.
According to the technical scheme, when more than 3 inverter units are arranged, only one inverter unit is in the fast hot standby state, so that the calculation amount can be saved compared with the situation that all the standby inverter units are in the fast hot standby state, and the operation of the identification result is carried out by each inverter unit, so that a lot of repeated operation is increased. But this approach reduces accuracy because the single chip operation of the secondary main inverter unit may be subject to error.
If M is greater than or equal to 3, the main inversion unit is used for selecting one standby inversion unit from M-1 standby inversion units as a secondary main inversion unit according to a preset rule, and adjusting the state of the secondary main inversion unit into a fast hot backup state, and the states of the remaining M-2 standby inversion units into a sleep backup state;
a secondary main inversion unit for obtaining the output power P of the system set According to I rms =（P set /R load ） 1/2 Calculating the expected amplitude I of the output current rms Wherein R is load Equivalent load resistance for the induction coil (i.e., heating the workpiece); acquiring the frequency f and the phase theta of the output current of the phase-locked loop; according to the expected amplitude I of the output current rms Calculating theoretical output current I from frequency f and phase θ out Is a theoretical waveform of (a); periodically collecting actual output current of a main inversion unit, sampling an actual output current every other sampling time, calculating a theoretical output current of one sampling time, calculating a difference value between the actual output current and the theoretical output current to obtain 1 difference value, adding 1 to an abnormal value b if the absolute value of the 1 difference value of a secondary main inversion unit is larger than a fluctuation threshold value, accumulating the abnormal value b if the absolute value of the difference value of continuous multiple sampling is larger than the fluctuation threshold value, and determining that the identification result is abnormal if the accumulated abnormal value b is larger than a quantity threshold value;
The secondary main inversion unit replaces the main inversion unit to execute subsequent current output, selects one standby inversion unit from the remaining M-2 standby inversion units as a secondary main inversion unit, and adjusts the state of the secondary main inversion unit into a quick hot standby state; if the abnormal value b is smaller than the quantity threshold value, determining that the identification result is normal, and continuously collecting the actual output current of the main inversion unit.
According to the technical scheme, the abnormal value is detected through the secondary main inversion unit, the total number of the abnormal detection values is counted, and when the total number is larger than the number threshold value, the identification result is determined to be abnormal.
For example, the main inversion unit is further configured to clear the abnormal value b when an absolute value of the difference value of the primary sampling is less than a fluctuation threshold. In the following, a technical scenario is described to explain the scheme of clearing the abnormal value b, where it is assumed that the initial value of b is 0, the absolute value of the difference value of the first sampling is greater than the fluctuation threshold value, b is increased by 1 from the initial value, the absolute value of the difference value of the second sampling is greater than the fluctuation threshold value, b is increased by 1 from 1 to 2 times again, the number threshold value is assumed to be 2, the absolute value of the difference value of the third sampling is greater than the fluctuation threshold value, b is increased by 1 to 3 times again, at this time, b is greater than the number threshold value 2, it is determined that the identification result is abnormal, and if the absolute value of the difference value of the third sampling is less than the fluctuation threshold value, b is not increased, and the value of b is cleared from 2.
The preset rule may be a preset rule customized by a manufacturer, for example, parameters such as response time, processing procedure, etc. are used as preset rules to screen the secondary main inversion unit.
Example 1
An embodiment of the present application provides a voltage source type induction heating power system, which is mainly divided into three parts, a rectifying part, an inverting part and a heating coil.
For the rectifying part, the rectifying part of the first embodiment of the present application is formed by connecting n+1 active power factor correction units in parallel, and has an n+1 backup function and a high power factor rectifying function. The reliability of the rectifying portion is greatly improved.
For the inversion part, the inversion part of the first embodiment of the present application is formed by connecting M inversion units in parallel, and has a rapid hot backup function. By the rapid fault identification method, a rapid hot backup function is realized, the fluctuation of output power is small in a period from the occurrence of faults of the inverter in a working state to the start of working of the inverter in the hot backup state, and the reliability of an inversion part of the voltage source type induction heating power supply system is greatly improved.
Referring to fig. 4, fig. 4 is a flow chart of a fast fault identification method according to an embodiment of the present application, and the specific implementation manner is as follows.
S1, the rapid fault identification method is realized in a high-frequency timing sampling interrupt program, and after the system is powered on, the variables required by interrupt are initialized.
n is the nth sample in one switching period (output current ripple period), and n=0 is initialized. Alpha is the allowable range of the deviation of the actual output current from the theoretical output current. b is the number of consecutive times that the actual output current deviates from the theoretical output current by more than the allowable range, initializing b=0.
S2, entering high-frequency timing sampling interruption, and collecting actual output electricity at nth sampling point momentStream I out actual ［n］。
S3, calculating a theoretical output current theory during nth sampling.
And S4, obtaining the frequency f and the phase angle theta of the output current according to the phase-locked loop result.
S5, calculating N according to the time sampling interruption frequency and the frequency of the output current.
The above N is the number of sampling points corresponding to one output current period, and n=output current period/sampling period.
S6, according to the set output power P set And the load equivalent resistance R of the known customer load Calculating the effective value I of the output current rms 。
Wherein I is rms =（P set /R load ） 1/2 。
And S7, according to the calculation results of the steps S4, S5 and S6, deducing the theoretical output current in the nth sampling.
Wherein the theoretical output current I out （t）=1.414×I rms ×sin(2×π×f×t+θ)。
S8, judging I out actual [ n ] and I out theory Whether the deviation of [ n ] is within an allowable range. If I out actual [ n ] and I out theory The deviation of [ n ] is within the allowable range, b=0.
S9, if I out actual [ n ] and I out theory If the deviation of [ n ] is not within the allowable range, b is increased by 1.
S10, judging whether b is not less than the maximum allowable continuous deviation times.
S11, if b is greater than or equal to the maximum allowable continuous deviation times, judging that the inverter in the current working state fails.
S12, the fault inverter (namely the main inverter) in the working state is shut down, and the inverter in the hot standby state is started.
S13, if b is smaller than the maximum allowable continuous deviation times, running a timing sampling interrupt once, and adding 1 to n.
S14, when N is larger than N, the next output current period is entered, and N is cleared and restarted.
S15, ending the nth time of the timing sampling interrupt program, and waiting for the next time of entering the timing sampling interrupt program.
The embodiment of the application further provides a voltage source type induction heating power supply method, referring to fig. 5, fig. 5 is a schematic flow diagram of the voltage source type induction heating power supply method provided in the embodiment of the application, the method is applied to a voltage source type induction heating power supply system, and the voltage source type induction heating power supply system includes: the input port of rectifying device is connected with the electric wire netting, and the output port is connected inverting device's input port, inverting device's output port is connected induction coil, wherein, rectifying device includes: n+1 active power correction units connected in parallel, the inverter device including: m parallel-connected inverter units, the M parallel-connected inverter units comprising: 1 main inversion unit and M-1 standby inversion units; when the system is in a normal working state, the main inversion unit is in a normal output state, and the M-1 standby inversion units are in a standby state;
The method comprises the following steps:
step S501, detecting a waveform diagram of the output current of the main inversion unit by M-1 standby inversion units;
step S502, M-1 standby inverter units execute fault recognition on the waveform diagram of the current to obtain a recognition result, and if the recognition result is that the waveform diagram is abnormal, one inverter unit is selected from the M-1 standby inverter units as a main inverter unit to execute subsequent current output;
n, M are integers greater than or equal to 2.
For example, the performing fault recognition on the waveform diagram of the current to obtain a recognition result specifically includes: acquiring output power of a system according to I rms =（P set /R load ） 1/2 Calculating the expected amplitude I of the output current rms The method comprises the steps of carrying out a first treatment on the surface of the Acquiring the frequency f and the phase theta of the output current of the system; according to the expected amplitude I of the output current rms Calculating a theoretical output from the frequency f and the phase θCurrent I out As shown in the formula: i out （t）=1.414×I rms X sin (2×pi×f×t+θ); periodically collecting actual output current of a main inversion unit, extracting an nth actual output current of an nth sampling time, calculating an nth theoretical output current of the nth sampling time according to the formula, calculating a difference value between the nth actual output current and the nth theoretical output current to obtain an nth difference value, calculating an absolute value of the nth difference value to obtain an nth absolute value, recording an abnormality 1 time if the minimum value in the nth absolute value is larger than a fluctuation threshold value, determining that the main inversion unit is abnormal if the continuously recorded abnormality times exceed an abnormality threshold value, and switching a standby inversion unit; wherein t is I out Sin represents a sine function; r is R load Is the equivalent load resistance value of the induction coil.
Illustratively, if M is greater than or equal to 3, the method further comprises: the main inversion unit selects one standby inversion unit from M-1 standby inversion units as a secondary main inversion unit according to a preset rule, the state of the secondary main inversion unit is adjusted to be a fast hot backup state, and the states of the remaining M-2 standby inversion units are adjusted to be a sleep backup state; each standby inverter unit of the M-1 standby inverter units is specifically configured to obtain output power of the system, according to I rms =（P set /R load ） 1/2 Calculating the expected amplitude I of the output current rms The method comprises the steps of carrying out a first treatment on the surface of the Acquiring the frequency f and the phase theta of the output current of the system; according to the expected amplitude I of the output current rms Calculating a theoretical output current I from the frequency f and the phase theta out As shown in the formula: i out （t）=1.414×I rms X sin (2×pi×f×t+θ); periodically collecting the actual output current of the main inversion unit, extracting the nth actual output current of the nth sampling time, calculating the nth theoretical output current of the nth sampling time according to the formula, calculating the difference value between the nth actual output current and the nth theoretical output current to obtain the nth difference value, calculating the absolute value of the nth difference value to obtain the nth absolute value, and if the nth absolute value is in the nth absolute value Recording abnormality for 1 time when the minimum value is larger than the fluctuation threshold value, and if the number of the continuously recorded abnormality exceeds the abnormality threshold value, determining that the main inversion unit is abnormal and switching the standby inversion unit; wherein t is I out Sin represents a sine function; r is R load An equivalent load resistance value for the induction coil; and when the identification result is abnormal, the secondary main inversion unit selects one standby inversion unit from the remaining M-2 standby inversion units according to the preset rule to serve as a secondary main inversion unit.
Illustratively, if M is greater than or equal to 3, the method further comprises: the main inversion unit selects one standby inversion unit from M-1 standby inversion units as a secondary main inversion unit according to a preset rule, the state of the secondary main inversion unit is adjusted to be a fast hot backup state, and the states of the remaining M-2 standby inversion units are adjusted to be a sleep backup state; the secondary main inversion unit obtains the output power of the system according to I rms =（P set /R load ） 1/2 Calculating the expected amplitude I of the output current rms Wherein R is load The equivalent load resistance value of the induction coil; acquiring the frequency f and the phase theta of the output current of the phase-locked loop; according to the expected amplitude I of the output current rms Calculating theoretical output current I from frequency f and phase θ out Is a theoretical waveform of (a); periodically collecting actual output current of a main inversion unit, sampling an actual output current every other sampling time, calculating a theoretical output current of one sampling time, calculating a difference value between the actual output current and the theoretical output current to obtain 1 difference value, adding 1 to an abnormal value b if the absolute value of the 1 difference value of a secondary main inversion unit is larger than a fluctuation threshold value, accumulating the abnormal value b if the absolute value of the difference value of continuous multiple sampling is larger than the fluctuation threshold value, and determining that the identification result is abnormal if the accumulated abnormal value b is larger than a quantity threshold value; the secondary main inversion unit is replaced by the main inversion unit to execute subsequent current output, one standby inversion unit is selected from the remaining M-2 standby inversion units to serve as a secondary main inversion unit, and the state of the secondary main inversion unit is adjusted to be a quick hot standby state; if the outlier b is less than the quantity threshold, determining the identificationAnd if the result is normal, continuously collecting the actual output current of the main inversion unit.
The above embodiments may be implemented in whole or in part by software, hardware, firmware, or any other combination. When implemented in software, the above-described embodiments may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions or computer programs. When the computer instructions or computer program are loaded or executed on a computer, the processes or functions described in accordance with the embodiments of the present application are all or partially produced. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. 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 one website site, computer, server, or data center to another website site, computer, server, or data center by wired or wireless means. The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains one or more sets of available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium. The semiconductor medium may be a solid state disk.
The embodiment of the application also provides a computer storage medium, where the computer storage medium stores a computer program for electronic data exchange, where the computer program causes a computer to execute part or all of the steps of any one of the methods described in the embodiments of the method, where the computer includes an electronic device.
Embodiments of the present application also provide a computer program product comprising a non-transitory computer-readable storage medium storing a computer program operable to cause a computer to perform some or all of the steps of any one of the methods described in the method embodiments above. The computer program product may be a software installation package, said computer comprising an electronic device.
It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.
In the several embodiments provided in the present application, it should be understood that the disclosed method, apparatus, and system may be implemented in other manners. For example, the device embodiments described above are merely illustrative; for example, the division of the units is only one logic function division, and other division modes can be adopted in actual implementation; for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may be physically included separately, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.
The integrated units implemented in the form of software functional units described above may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: u disk, removable hard disk, magnetic disk, optical disk, volatile memory or nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example but not limitation, many forms of random access memory (random access memory, RAM) are available, such as Static RAM (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced Synchronous Dynamic Random Access Memory (ESDRAM), synchronous Link DRAM (SLDRAM), and direct memory bus RAM (DR RAM). Etc. various media in which program code may be stored.
Although the present invention is disclosed above, the present invention is not limited thereto. Variations and modifications, including combinations of the different functions and implementation steps, as well as embodiments of the software and hardware, may be readily apparent to those skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. A voltage source type induction heating power supply system, the voltage source type induction heating power supply system comprising: the input port of the rectifying device is connected with a power grid, the output port of the rectifying device is connected with the input port of the inverting device, the output port of the inverting device is connected with the induction coil,
the rectifying device includes: the rectification device is a rectification device with an N+1 backup function and a high power factor rectification function; the inverter device includes: m parallel-connected inverter units, the M parallel-connected inverter units comprising: 1 main inversion unit and M-1 standby inversion units; wherein,
when the system is in a normal working state, the main inversion unit is in a normal output state, and the M-1 standby inversion units are in a standby state;
The M-1 standby inverter units are used for detecting the waveform diagram of the output current of the main inverter unit, performing fault identification on the waveform diagram of the current to obtain an identification result, and if the identification result is that the waveform diagram is abnormal, selecting one inverter unit from the M-1 standby inverter units as the main inverter unit to perform subsequent current output;
n, M are integers greater than or equal to 2.
2. The voltage-source type induction heating power supply system according to claim 1, characterized in that,
each standby inverter unit of the M-1 standby inverter units is specifically configured to obtain output power P of the system set According to I rms =（P set /R load ） 1/2 Calculating the expected amplitude I of the output current rms ；
Acquiring the frequency f and the phase theta of the output current of the system;
according to the expected amplitude I of the output current rms Calculating a theoretical output current I from the frequency f and the phase theta out Is shown in the following formula:
I out （t）=1.414×I rms ×sin(2×π×f×t+θ)；
periodically collecting actual output current of a main inversion unit, extracting an nth actual output current of an nth sampling time, calculating an nth theoretical output current of the nth sampling time according to the formula, calculating a difference value between the nth actual output current and the nth theoretical output current to obtain an nth difference value, recording an abnormality 1 time if the absolute value of the nth difference value is larger than a fluctuation threshold value, determining that the main inversion unit is abnormal if the continuously recorded abnormality times exceed an abnormality threshold value, and switching a standby inversion unit;
Wherein t is I out Sin represents a sine function; r is R load Is the equivalent load resistance value of the induction coil.
3. The voltage-source type induction heating power supply system according to claim 1, wherein if M.gtoreq.3,
the main inversion unit is used for selecting one standby inversion unit from M-1 standby inversion units as a secondary main inversion unit according to a preset rule, adjusting the state of the secondary main inversion unit into a rapid hot backup state, and adjusting the states of the remaining M-2 standby inversion units into a sleep backup state;
the secondary main inversion unit is used for each standby inversion unit in the M-1 standby inversion units, and is particularly used for acquiring the output power of the system according to I rms =（P set /R load ） 1/2 Calculating the expected amplitude I of the output current rms The method comprises the steps of carrying out a first treatment on the surface of the Acquiring the frequency f and the phase theta of the output current of the system; according to the expected amplitude I of the output current rms Calculating a theoretical output current I from the frequency f and the phase theta out Is shown in the following formula:
I out （t）=1.414×I rms ×sin(2×π×f×t+θ)；
periodically collecting actual output current of a main inversion unit, extracting an nth actual output current of an nth sampling time, calculating an nth theoretical output current of the nth sampling time according to the formula, calculating a difference value between the nth actual output current and the nth theoretical output current to obtain an nth difference value, recording an abnormality 1 time if the absolute value of the nth difference value is larger than a fluctuation threshold value, determining that the main inversion unit is abnormal if the continuously recorded abnormality times exceed an abnormality threshold value, and switching a standby inversion unit;
Wherein t is I out Sin represents a sine function; r is R load An equivalent load resistance value for the induction coil;
and the secondary main inversion unit is also used for selecting one standby inversion unit from the remaining M-2 standby inversion units according to the preset rule as a secondary main inversion unit when the main inversion unit is determined to be abnormal.
4. The voltage-source type induction heating power supply system according to claim 1, wherein if M.gtoreq.3,
the main inversion unit is used for selecting one standby inversion unit from M-1 standby inversion units as a secondary main inversion unit according to a preset rule, adjusting the states of the secondary main inversion units to be in a rapid hot standby state, and adjusting the states of the remaining M-2 standby inversion units to be in a sleep standby state;
the secondary main inversion unit is used for acquiring the output power of the system according to I rms =（P set /R load ） 1/2 Calculating the expected amplitude I of the output current rms Wherein R is load The equivalent load resistance value of the induction coil; acquiring the frequency f and the phase theta of the output current of the phase-locked loop; according to the expected amplitude I of the output current rms Calculating theoretical output current I from frequency f and phase θ out Is a theoretical waveform of (a); periodically collecting actual output current of a main inversion unit, sampling an actual output current every other sampling time, calculating a theoretical output current of one sampling time, calculating a difference value between the actual output current and the theoretical output current to obtain 1 difference value, adding 1 to an abnormal value b if the absolute value of the 1 difference value of a secondary main inversion unit is larger than a fluctuation threshold value, accumulating the abnormal value b if the absolute value of the difference value of continuous multiple sampling is larger than the fluctuation threshold value, and determining that the identification result is abnormal if the accumulated abnormal value b is larger than a quantity threshold value;
The secondary main inversion unit replaces the main inversion unit to execute subsequent current output, selects one standby inversion unit from the remaining M-2 standby inversion units as a secondary main inversion unit, and adjusts the state of the secondary main inversion unit into a quick hot standby state; if the abnormal value b is smaller than the quantity threshold value, determining that the identification result is normal, and continuously collecting the actual output current of the main inversion unit.
5. The voltage-source type induction heating power supply system according to claim 4, characterized in that,
and the main inversion unit is also used for clearing the abnormal value b when the absolute value of the difference value of one sampling is smaller than the fluctuation threshold value.
6. A voltage source type induction heating power supply method applied to a voltage source type induction heating power supply system, the voltage source type induction heating power supply system comprising: the rectifier device and inverter device, rectifier device's input port is connected with the electric wire netting, and the output port is connected inverter device's input port, inverter device's output port is connected induction coil, its characterized in that, rectifier device includes: the rectification device is a rectification device with an N+1 backup function and a high power factor rectification function; the inverter device includes: m parallel-connected inverter units, the M parallel-connected inverter units comprising: 1 main inversion unit and M-1 standby inversion units; the method comprises the following steps:
When the system is in a normal working state, the main inversion unit is in a normal output state, and the M-1 standby inversion units are in a standby state;
the M-1 standby inverter units detect the waveform diagram of the output current of the main inverter unit, perform fault identification on the waveform diagram of the current to obtain an identification result, and select one inverter unit from the M-1 standby inverter units as the main inverter unit to perform subsequent current output if the identification result is that the waveform diagram is abnormal;
n, M are integers greater than or equal to 2.
7. The method of claim 6, wherein performing fault recognition on the waveform of the current to obtain a recognition result specifically comprises:
acquiring output power of a system according to I rms =（P set /R load ） 1/2 Calculating the expected amplitude I of the output current rms ；
Acquiring the frequency f and the phase theta of the output current of the system;
according to the expected amplitude I of the output current rms Calculating a theoretical output current I from the frequency f and the phase theta out Is shown in the following formula:
I out （t）=1.414×I rms ×sin(2×π×f×t+θ)；
periodically collecting actual output current of a main inversion unit, extracting an nth actual output current of an nth sampling time, calculating an nth theoretical output current of the nth sampling time according to the formula, calculating a difference value between the nth actual output current and the nth theoretical output current to obtain an nth difference value, recording an abnormality 1 time if the absolute value of the nth difference value is larger than a fluctuation threshold value, determining that the main inversion unit is abnormal if the continuously recorded abnormality times exceed an abnormality threshold value, and switching a standby inversion unit;
Wherein t is I out Sin represents a sine function; r is R load Is the equivalent load resistance value of the induction coil.
8. The method of claim 6, wherein if M is greater than or equal to 3, the method further comprises:
the main inversion unit selects one standby inversion unit from M-1 standby inversion units as a secondary main inversion unit according to a preset rule, the state of the secondary main inversion unit is adjusted to be a fast hot backup state, and the states of the remaining M-2 standby inversion units are adjusted to be a sleep backup state;
each standby inverter unit of the M-1 standby inverter units is specifically used for acquiring the input of the systemOutput according to I rms =（P set /R load ） 1/2 Calculating the expected amplitude I of the output current rms The method comprises the steps of carrying out a first treatment on the surface of the Acquiring the frequency f and the phase theta of the output current of the system; according to the expected amplitude I of the output current rms Calculating a theoretical output current I from the frequency f and the phase theta out Is shown in the following formula:
I out （t）=1.414×I rms ×sin(2×π×f×t+θ)；
periodically collecting actual output current of a main inversion unit, extracting an nth actual output current of an nth sampling time, calculating an nth theoretical output current of the nth sampling time according to the formula, calculating a difference value between the nth actual output current and the nth theoretical output current to obtain an nth difference value, recording an abnormality 1 time if the absolute value of the nth difference value is larger than a fluctuation threshold value, determining that the main inversion unit is abnormal if the continuously recorded abnormality times exceed an abnormality threshold value, and switching a standby inversion unit;
Wherein t is I out Sin represents a sine function; r is R load An equivalent load resistance value for the induction coil;
and when the secondary main inversion unit determines that the main inversion unit is abnormal, selecting one standby inversion unit from the remaining M-2 standby inversion units according to the preset rule as a secondary main inversion unit.
9. The method of claim 6, wherein if M is greater than or equal to 3, the method further comprises:
the main inversion unit selects one standby inversion unit from M-1 standby inversion units as a secondary main inversion unit according to a preset rule, the state of the secondary main inversion unit is adjusted to be a fast hot backup state, and the states of the remaining M-2 standby inversion units are adjusted to be a sleep backup state;
the secondary main inversion unit obtains the output power of the system according to I rms =（P set /R load ） 1/2 Calculating the expected amplitude of the output currentValue I rms Wherein R is load The equivalent load resistance value of the induction coil; acquiring the frequency f and the phase theta of the output current of the phase-locked loop; according to the expected amplitude I of the output current rms Calculating theoretical output current I from frequency f and phase θ out Is a theoretical waveform of (a); periodically collecting actual output current of a main inversion unit, sampling an actual output current every other sampling time, calculating a theoretical output current of one sampling time, calculating a difference value between the actual output current and the theoretical output current to obtain 1 difference value, adding 1 to an abnormal value b if the absolute value of the 1 difference value of a secondary main inversion unit is larger than a fluctuation threshold value, accumulating the abnormal value b if the absolute value of the difference value of continuous multiple sampling is larger than the fluctuation threshold value, and determining that the identification result is abnormal if the accumulated abnormal value b is larger than a quantity threshold value; the secondary main inversion unit is replaced by the main inversion unit to execute subsequent current output, one standby inversion unit is selected from the remaining M-2 standby inversion units to serve as a secondary main inversion unit, and the state of the secondary main inversion unit is adjusted to be a quick hot standby state; if the abnormal value b is smaller than the quantity threshold value, determining that the identification result is normal, and continuously collecting the actual output current of the main inversion unit.
10. A computer-readable storage medium, characterized in that a computer program for electronic data exchange is stored, wherein the computer program causes a computer to execute the instructions of the steps in the method according to any one of claims 6-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410216960.5A CN117792115B (en) | 2024-02-28 | 2024-02-28 | Voltage source type induction heating power supply system, method and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410216960.5A CN117792115B (en) | 2024-02-28 | 2024-02-28 | Voltage source type induction heating power supply system, method and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117792115A true CN117792115A (en) | 2024-03-29 |
| CN117792115B CN117792115B (en) | 2024-04-30 |
Family
ID=90385345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410216960.5A Active CN117792115B (en) | 2024-02-28 | 2024-02-28 | Voltage source type induction heating power supply system, method and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117792115B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100740336B1 (en) * | 2006-04-14 | 2007-07-19 | 주식회사 피에스텍 | Fault-tolerant type induction heating power supply and method for controlling same |
| CN109873487A (en) * | 2019-02-15 | 2019-06-11 | 南京航空航天大学 | A kind of master-slave back-up method for three-phase tri-level VIENNA rectifier |
| CN115453853A (en) * | 2022-10-12 | 2022-12-09 | 沈阳飞机工业（集团）有限公司 | Unmanned aerial vehicle flight management system steering wheel troubleshooting system |
| CN116937936A (en) * | 2023-08-11 | 2023-10-24 | 西安领充创享新能源科技有限公司 | Inverter control method, inverter control device, inverter system and storage medium |
| CN117156620A (en) * | 2023-10-31 | 2023-12-01 | 上海盛迪瓦特电气有限公司 | High-reliability current source type induction heating power supply system and device |
| CN117559833A (en) * | 2024-01-08 | 2024-02-13 | 上海盛迪瓦特电气有限公司 | Induction heating power supply control method and induction heating power supply |
-
2024
- 2024-02-28 CN CN202410216960.5A patent/CN117792115B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100740336B1 (en) * | 2006-04-14 | 2007-07-19 | 주식회사 피에스텍 | Fault-tolerant type induction heating power supply and method for controlling same |
| CN109873487A (en) * | 2019-02-15 | 2019-06-11 | 南京航空航天大学 | A kind of master-slave back-up method for three-phase tri-level VIENNA rectifier |
| CN115453853A (en) * | 2022-10-12 | 2022-12-09 | 沈阳飞机工业（集团）有限公司 | Unmanned aerial vehicle flight management system steering wheel troubleshooting system |
| CN116937936A (en) * | 2023-08-11 | 2023-10-24 | 西安领充创享新能源科技有限公司 | Inverter control method, inverter control device, inverter system and storage medium |
| CN117156620A (en) * | 2023-10-31 | 2023-12-01 | 上海盛迪瓦特电气有限公司 | High-reliability current source type induction heating power supply system and device |
| CN117559833A (en) * | 2024-01-08 | 2024-02-13 | 上海盛迪瓦特电气有限公司 | Induction heating power supply control method and induction heating power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117792115B (en) | 2024-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3923003B1 (en) | Islanding detection method, device, and computer readable storage medium | |
| CN112152224B (en) | Voltage sag treatment optimization method and system | |
| Andresen et al. | Lifetime-based power routing in parallel converters for smart transformer application | |
| CN106230239B (en) | Method and system for adjusting temperature variation of semiconductor component | |
| AU2020346195B2 (en) | Method, apparatus, and system for controlling string inverter, and storage medium | |
| WO2009114334A2 (en) | System and method for load sharing in multi-module power supply systems | |
| EP3128636B1 (en) | Harmonic current compensation apparatus and air conditioning system | |
| EP3952046B1 (en) | Photovoltaic inverter and corresponding switch frequency control method | |
| CN112840522B (en) | Power supply device and abnormality detection method for AC power supply | |
| CN112821455A (en) | Off-grid starting method and system for new energy power generation system | |
| US10686315B2 (en) | Method for operating inverter and inverter | |
| US20180205334A1 (en) | Rotating switching strategy for power converters | |
| US20230378764A1 (en) | Line nucontrol method and distributed power system | |
| CN117792115B (en) | Voltage source type induction heating power supply system, method and storage medium | |
| CN105116985B (en) | A kind of DDR clock frequency control method thereofs and system | |
| JP6707196B2 (en) | Boost converter and motor drive controller | |
| WO2018108277A1 (en) | Method for detecting islanding conditions for a dc/ac converter apparatus and a dc/ac converter apparatus thereof | |
| CN111146966A (en) | Power conversion device, power conversion system, and power conversion method | |
| Aly et al. | Design and validation of SVPWM algorithm for thermal protection of T-type three-level inverters | |
| JP6344500B1 (en) | Matrix converter and constant determination method for AC motor | |
| CN112840551A (en) | Power conversion device, power conversion system, and power conversion method | |
| CN109669342A (en) | The convergence state detection method and device of converter control system, storage medium | |
| Sadeque et al. | Cooperative inverters to overcome PLL malfunctions | |
| CN111404194A (en) | Alternating current energy consumption resistor optimal configuration method and system suitable for flexible direct current power grid | |
| CN113376424B (en) | Voltage sag detection method for cascade type electric energy quality comprehensive treatment device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |