Zero-crossing conduction method and system of switching tube, electronic equipment and storage medium

Abstract

The embodiment of the invention provides a switch tube zero-crossing conduction method and system, electronic equipment and a storage medium, and belongs to the technical field of zero-crossing detection. The method comprises the following steps: acquiring starting delay durations corresponding to a plurality of switching devices; detecting an input alternating current signal, and setting a pre-conduction voltage range of a zero crossing point of the alternating current signal according to the alternating current signal and the starting delay duration; when a conduction instruction is received, obtaining a current voltage value of the AC signal, determining a switched-on switching device according to the current voltage value and the pre-conduction voltage range, and recording the switching device as a target switching device; controlling the driving module to drive the target switching device to enable the target switching device to be in an amplification state; and when the zero-crossing detection module detects a zero-crossing point, the driving module is controlled to drive the target switching device, so that the target switching device is in a saturated state. The switching device can be accurately controlled to be switched on at the zero crossing point, and the reliability of the switching device and the regulation accuracy of the control module are improved.

Description

Technical Field

[0001] The present application relates to the field of zero-crossing detection technology, and in particular to a method, system, electronic device and storage medium for conducting a switch tube at zero-crossing. Background Art

[0002] In the related technology, the switch tube is the key power control element in the induction cooker. They are responsible for converting the mains electricity into high-frequency alternating current to drive the stove coil. Through zero-crossing detection, the induction cooker can accurately control the conduction time of the switch tube, thereby controlling the output power. However, the traditional zero-crossing detection circuit often has problems such as complex circuit structure, low safety, and inaccurate detection. In addition, the switch tube is not fully turned on at the zero-crossing point, which will increase the power loss of the switch tube and reduce the accuracy of controlling the switch tube to turn on at the zero-crossing point, which affects the reliability of the switch tube and the accuracy of the control module regulation. Summary of the invention

[0003] The main purpose of the embodiments of the present application is to propose a method, system, electronic device and storage medium for zero-crossing conduction of a switch tube, so as to achieve precise control of the conduction of the switch device at the zero-crossing point, improve the reliability of the switch device and the accuracy of the control module regulation.

[0004] To achieve the above-mentioned purpose, an embodiment of the present application provides a zero-crossing conduction method for a switch tube, which is applied to a detection device, wherein the device comprises: a zero-crossing detection module, a driving module and a plurality of switch devices; the zero-crossing detection module is used to detect the zero-crossing point of an input AC signal, the driving module is connected to the plurality of switch devices, and the driving module is used to control the on and off of the plurality of switch devices;

[0005] The method comprises:

[0006] Obtaining a turn-on delay duration corresponding to a plurality of the switch devices;

[0007] Detecting an input AC signal, and setting a pre-on voltage range of a zero-crossing point of the AC signal according to the AC signal and the turn-on delay time;

[0008] When a turn-on instruction is received, a current voltage value of the AC signal is acquired, and a switch device to be turned on is determined according to the current voltage value and the pre-turn-on voltage range, and the switch device is recorded as a target switch device;

[0009] Controlling the driving module to drive the target switch device so that the target switch device is in an amplified state;

[0010] When the zero-crossing detection module detects a zero-crossing point, the driving module is controlled to drive the target switching device so that the target switching device is in a saturation state.

[0011] In some embodiments, obtaining the turn-on delay durations corresponding to the plurality of switch devices comprises:

[0012] Controlling the driving module to send a test conduction signal to the plurality of switch devices, and recording the sending time of the test conduction signal;

[0013] The conduction time of the plurality of switch devices is obtained, and the turn-on delay time is determined according to the conduction time and the transmission time.

[0014] In some embodiments, the zero-crossing detection module includes: a rectifier, a photoelectric coupler, a current-limiting resistor and a voltage-stabilizing diode, wherein the rectifier is connected to the anode of the light-emitting diode of the photoelectric coupler through the current-limiting resistor and the voltage-stabilizing diode; the zero-crossing detection process specifically includes:

[0015] The input AC signal is rectified by the rectifier to obtain a rectified signal;

[0016] The rectified signal is subjected to current limiting and voltage stabilization processing by means of the current limiting resistor and the voltage stabilizing diode;

[0017] When the rectified signal is smaller than the sum of the withstand voltage of the voltage stabilizing diode and the conduction voltage drop of the light emitting diode, the light emitting diode is not turned on, confirming that the zero crossing point is detected.

[0018] In some embodiments, setting the pre-on voltage range of the zero-crossing point of the AC signal according to the AC signal and the turn-on delay time includes:

[0019] Determining an AC voltage waveform according to the AC signal;

[0020] According to the start-up delay time and the AC voltage waveform, a range voltage value is determined with the zero-crossing point as the target voltage;

[0021] The pre-turn-on voltage range corresponding to the plurality of switching devices is determined according to the range voltage value.

[0022] In some embodiments, determining the switch device to be turned on according to the current voltage value and the pre-turn-on voltage range includes:

[0023] Comparing the current voltage value with the pre-on voltage range, and determining whether the current voltage value is within any of the pre-on voltage ranges;

[0024] If so, one switching device is randomly selected from the plurality of switching devices as the switching device to be turned on.

[0025] In some embodiments, the zero-crossing conduction method of the switch tube further includes:

[0026] Detect the peak voltage V of the rectified signal p , and obtain the withstand voltage value V of the voltage zener diode D , the voltage drop V of the light emitting diode U and the conduction current IU of the light emitting diode;

[0027] According to the peak voltage V p , the withstand voltage value V D , the voltage drop V U and the conduction current IU, the resistance value is determined by the formula R1 = V p -V D -V U / IU, calculate the resistance value R1 of the current limiting resistor.

[0028] In some embodiments, the turn-on delay duration is a preset turn-on delay duration.

[0029] To achieve the above-mentioned purpose, another aspect of the embodiment of the present application provides a switch tube zero-crossing conduction system, which is applied to a detection device, the device comprising: a zero-crossing detection module, a driving module and a plurality of switch devices; the zero-crossing detection module is used to detect the zero-crossing point of the input AC signal, the driving module is connected to the plurality of the switch devices, and the driving module is used to control the on and off of the plurality of the switch devices; the system comprises:

[0030] A data acquisition module, used to acquire the turn-on delay duration corresponding to the plurality of switch devices;

[0031] A data setting module, used for detecting an input AC signal, and setting a pre-on voltage range of a zero-crossing point of the AC signal according to the AC signal and the turn-on delay time;

[0032] An instruction response module, configured to obtain a current voltage value of the AC signal when receiving a conduction instruction, determine a switch device to be turned on according to the current voltage value and the pre-conduction voltage range, and record the switch device as a target switch device;

[0033] an amplification driving module, used for controlling the driving module to drive the target switch device so that the target switch device is in an amplification state;

[0034] The saturation driving module is used to control the driving module to drive the target switching device when the zero-crossing detection module detects a zero-crossing point, so that the target switching device is in a saturation state.

[0035] To achieve the above objective, another aspect of an embodiment of the present application provides an electronic device, the electronic device comprising a memory and a processor, the memory storing a computer program, and the processor implementing the above method when executing the computer program.

[0036] To achieve the above objective, another aspect of an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and the computer program implements the above method when executed by a processor.

[0037] The embodiments of the present application include at least the following beneficial effects: The present application provides a method, system, electronic device and storage medium for zero-crossing conduction of a switch tube. The scheme sets a pre-conduction voltage range corresponding to multiple switch devices through the start-up delay of multiple switch devices. When a conduction instruction is received, the switch device to be turned on, that is, the target switch device, can be determined according to the current voltage value and the pre-conduction voltage range of multiple switch devices, and the target switch device can be controlled to enter an amplification state to achieve pre-conduction of the switch device. Until the zero crossing point is detected, the target switch device is controlled to enter a saturation state to achieve full conduction of the switch device at the zero crossing point, thereby achieving step-by-step control of the conduction state of the switch device, turning on the switch device in steps, and accurately controlling the switch device to be fully turned on at the zero crossing point, reducing the power loss of the switch device, and improving the reliability of the switch device and the accuracy of the control module regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the flow of the zero-crossing conduction method of the switch tube provided in an embodiment of the present application;

[0039] Figure 2 is a structural schematic diagram of a zero-crossing detection module of a detection device provided in an embodiment of the present application;

[0040] Figure 3 It is a schematic diagram of the hardware structure of the electronic device provided in the embodiment of the present application.

[0041] Reference numerals: BD1, rectifier, U1, photocoupler, R1, current limiting resistor, DZ1, zener diode, R2, zener resistor. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the embodiments of the present application. They are only examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the attached claims.

[0043] It is understood that the terms "first", "second", etc. used in this application can be used to describe various concepts in this article, but unless otherwise specified, these concepts are not limited by these terms. These terms are only used to distinguish one concept from another concept. For example, without departing from the scope of the embodiment of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0044] The terms "at least one", "multiple", "each", "any", etc. used in this application, at least one includes one, two or more, multiple includes two or more, each refers to each of the corresponding multiple, and any refers to any one of the multiple.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0046] As described in the background technology, traditional zero-crossing detection circuits often have problems such as complex circuit structure, low safety, and inaccurate detection. In addition, the switch tube is not fully on at the zero-crossing point, which will increase the power loss of the switch tube and reduce the accuracy of controlling the switch tube to be turned on at the zero-crossing point, thereby affecting the reliability of the switch tube and the accuracy of the control module regulation.

[0047] In this regard, the present application provides a method, system, electronic device and storage medium for zero-crossing conduction of a switch tube to achieve precise control of the conduction of the switch device at the zero-crossing point, thereby improving the reliability of the switch device and the accuracy of control module regulation.

[0048] In some embodiments of one aspect of the present application, a zero-crossing conduction method for a switch tube is applied to a detection device, which includes: a zero-crossing detection module, a driving module, and a plurality of switch devices.

[0049] The zero-crossing detection module is electrically connected to the external AC power supply. The zero-crossing detection module can receive an AC signal input by the external AC power supply and detect a zero-crossing point of the AC signal.

[0050] In one embodiment, referring to Figure 2 , Figure 2 It is a structural diagram of a zero-crossing detection module of a detection device provided in an embodiment of the present application. The zero-crossing detection module includes: a rectifier BD1, an optocoupler U1, a current limiting resistor R1, a zener diode DZ1, a zener resistor R2 and a filter circuit.

[0051] The input end of the rectifier BD1 is electrically connected to an external AC power supply, the output end of the rectifier BD1 is electrically connected to the cathode of the voltage-stabilizing diode DZ1 through the current-limiting resistor R1, the anode of the voltage-stabilizing diode DZ1 is electrically connected to the anode of the light-emitting diode of the photoelectric coupler U1, the voltage-stabilizing resistor R2 is connected in parallel with the light-emitting diode of the photoelectric coupler U1, and the phototransistor of the photoelectric coupler U1 is electrically connected to the zero-crossing output end through a filtering circuit.

[0052] The rectifier BD1 processes the AC input signal into a rectified signal, and the rectifier BD1 is connected in series to the light-emitting diode of the photocoupler U1 after passing through the current-limiting resistor R1 and the voltage-stabilizing diode DZ1 in sequence; the phototransistor is connected to the zero-crossing output terminal and the collector of the phototransistor is electrically connected to the +5V power supply terminal. When the rectified signal is less than the sum of the withstand voltage of the voltage-stabilizing diode DZ1 and the conduction voltage drop of the light-emitting diode of the photocoupler U1, the light-emitting diode of the photocoupler U1 is not turned on, and the zero-crossing output terminal outputs a high-level signal; otherwise, the light-emitting diode of the photocoupler U1 is turned on, and the zero-crossing output terminal outputs a low-level signal.

[0053] After rectification, a voltage stabilizing diode DZ1 is set to affect the width of the output zero-crossing signal and play an anti-jitter role. The greater the withstand voltage value, the better the anti-jitter performance and the increase in the width of the zero-crossing pulse signal. The required voltage stabilizing diode DZ1 is determined by the peak-to-peak value of the input AC signal. By setting the voltage stabilizing resistor R2, the output end of the photocoupler U1 is fully turned on after the light-emitting diode of the photocoupler U1 emits light, avoiding the output end being in an amplified state when the light-emitting diode end of the photocoupler U1 emits weak light, causing Vp1 to be in an intermediate level of 0 to +5V. By setting a filtering circuit, the module's anti-interference ability is improved, making the output signal "cleaner".

[0054] The driving module is electrically connected to the plurality of switch devices, and the driving module can control the on and off of the plurality of switch devices.

[0055] In one embodiment, the driving module can receive a control signal to drive the on / off and conduction opening of the switch device so that the switch device enters an amplification state or a saturation state. In this embodiment, the specific structure of the driving module is not limited.

[0056] Figure 1 is an optional flow chart of the zero-crossing conduction method of the switch tube provided in the embodiment of the present application, Figure 1 The method may include but is not limited to including S100 to S500.

[0057] S100, obtaining a turn-on delay time corresponding to a plurality of switch devices;

[0058] S200, detecting an input AC signal, and setting a pre-on voltage range of a zero-crossing point of the AC signal according to the AC signal and a turn-on delay time;

[0059] S300, when receiving a turn-on instruction, obtaining a current voltage value of the AC signal, determining a switch device to be turned on according to the current voltage value and a pre-turn-on voltage range, and recording the switch device as a target switch device;

[0060] S400, controlling the driving module to drive the target switch device so that the target switch device is in an amplified state;

[0061] S500, when the zero-crossing detection module detects a zero-crossing point, the control driving module drives the target switching device to put the target switching device into a saturation state.

[0062] In steps S100 to S500 shown in the embodiment of the present application, a pre-on voltage range corresponding to the multiple switching devices is set through the start-up delay of multiple switching devices. When a turn-on instruction is received, the switching device to be turned on, that is, the target switching device, can be determined according to the current voltage value and the pre-on voltage range of the multiple switching devices, and the target switching device can be controlled to enter an amplification state to achieve pre-on switching of the switching device. Until a zero crossing point is detected, the target switching device is controlled to enter a saturation state to achieve full turn-on of the switching device at the zero crossing point, thereby achieving step-by-step control of the turn-on state of the switching device, turning on the switching device in steps, and accurately controlling the switch device to be fully turned on at the zero crossing point, thereby reducing the power loss of the switching device and improving the reliability of the switching device and the accuracy of the control module regulation.

[0063] In some embodiments of S100, in the prior art, when a zero crossing is detected, the driving module is controlled to send a signal, and then the switching device receives the signal and turns on, but the switching device itself has a turn-on delay time, and there is also a certain time between the driving module sending the signal and the switching device receiving the signal. By superimposing the two time periods, the switching device may not be fully turned on until after the zero crossing, and therefore, the turn-on delay time of the switching device is obtained.

[0064] The turn-on delay time can be detected by sending a test conduction signal through the driving module, or a preset turn-on delay time can be formed according to the specification parameters of the switching device used and the preset delay time.

[0065] In some embodiments of S200, since the frequency and amplitude of the input AC signal are different, the input AC signal is detected, and based on the AC signal, the pre-on voltage range is determined according to the turn-on delay time in S100 and the zero crossing point of the AC signal as the target voltage.

[0066] The turn-on delay time corresponds to a plurality of switch devices, and the pre-conduction voltage range determined by the turn-on delay time also corresponds to a plurality of switch devices.

[0067] In some embodiments of S300, when receiving the turn-on instruction, the current voltage value of the AC signal is detected to obtain the current voltage value, and the current voltage value is compared with the pre-turn-on voltage range corresponding to the plurality of switch devices in S200 to determine the switch device to be turned on and use the switch device as the target switch device.

[0068] In one embodiment, the current voltage value is compared with the pre-conduction voltage range corresponding to the plurality of switch devices to determine whether the current voltage value is within any of the pre-conduction voltage ranges. When the current voltage value is within any of the pre-conduction voltage ranges, it is considered that the current voltage value is close to the zero crossing point. If the application devices all use the same type of switch devices, the values ​​of the pre-conduction voltage ranges corresponding to the plurality of switch devices are similar, and one switch device can be arbitrarily selected from the plurality of switch devices as the switch device to be turned on, i.e., as the target switch device.

[0069] In another embodiment, the current voltage value is compared with the pre-conduction voltage ranges corresponding to the multiple switch devices to determine whether the current voltage value is within any of the pre-conduction voltage ranges. When the current voltage value is within any of the pre-conduction voltage ranges, it is considered that the current voltage value is close to the zero crossing point. If the application device does not use the same type of switch devices, the values ​​of the pre-conduction voltage ranges corresponding to the multiple switch devices are different, then the pre-conduction voltage range closest to the current voltage value can be determined, and the pre-conduction voltage range is used as the target voltage range, and the switch device corresponding to the target voltage range is used as the switch device that is turned on, that is, as the target switch device.

[0070] In some embodiments of S400 , the driving module is controlled to run, and the driving module controls the target switching device determined in S300 , so that the target switching device enters an amplification state, so as to initially enter a conduction state.

[0071] In some embodiments of S500, when the zero-crossing detection module detects the zero-crossing point, that is, when the current voltage value has reached the zero-crossing point, the driving module is controlled to run, and the driving module controls the target switching device determined by S300 so that the target switching device enters a saturation state, so that the switching device can be fully turned on at the zero-crossing point.

[0072] In some embodiments of the present application, in S100, the process of obtaining the start-up delay duration includes the following steps:

[0073] S110, controlling the driving module to send a test conduction signal to a plurality of switch devices, and recording the sending time of the test conduction signal.

[0074] S111, obtaining the conduction time of multiple switch devices, and determining the start delay time according to the conduction time and the transmission time.

[0075] In S110 , the driving module is controlled to run, the driving module sends a test conduction signal to a plurality of switch devices, and the time when the driving module sends the test conduction signal, ie, the sending time, is recorded.

[0076] In S111, multiple switching devices are detected. When the switching devices enter the amplification state, the conduction time is recorded to obtain the conduction time of the multiple switching devices. The turn-on delay time is calculated through the conduction time and the sending time recorded in S110. The turn-on delay time includes the turn-on delay time and the signal transmission time.

[0077] Through S110 to S111, in view of the situation that the values ​​of the turn-on delay time are not completely the same due to parameter differences of various switch devices in actual use, the actual turn-on delay time is detected and obtained by sending a test turn-on signal.

[0078] In some embodiments of the present application, in S100, the process of obtaining the start-up delay duration includes the following steps:

[0079] S120, obtaining a turn-on delay time and a preset delay time in the specification parameters of the switch device, wherein the turn-on delay time and the preset delay time constitute a preset turn-on delay duration.

[0080] In S120, the specification parameters of the adopted switch device and the preset delay time are obtained, and the preset turn-on delay time is obtained by superimposing the turn-on delay time in the specification parameters and the preset delay time.

[0081] In some embodiments of the present application, in S200, the process of setting the pre-turn-on voltage range includes the following steps:

[0082] S210, determining an AC voltage waveform according to the AC signal.

[0083] S220, according to the start delay time and the AC voltage waveform, the range voltage value is determined with the zero crossing point as the target voltage.

[0084] S230 , determining a pre-on voltage range corresponding to a plurality of switch devices according to the range voltage value.

[0085] In S210 , since the frequency and amplitude of the input AC signal are different, the input AC signal is detected, and the AC voltage waveform is determined according to the AC signal.

[0086] In S220, based on the AC voltage waveform and according to the turn-on delay time of each switch device in S100, the voltage value at the start point of the range, ie, the range voltage value, is determined with the zero crossing point of the AC signal as the target voltage.

[0087] In S230 , the pre-on voltage range of each switching device is obtained through the range voltage value, that is, the pre-on voltage range corresponding to the plurality of switching devices.

[0088] The pre-conduction voltage range does not include a zero crossing point, the turn-on delay time corresponds to a plurality of switch devices, and the pre-conduction voltage range determined by the turn-on delay time also corresponds to a plurality of switch devices.

[0089] Through S210 to S230, due to the different frequencies and amplitudes of the input AC signals, multiple pre-on voltage ranges are obtained according to the AC voltage waveform, the turn-on delay time and the zero crossing point, so as to subsequently determine whether the current voltage value is close to the zero crossing point or determine the target switching device.

[0090] In some embodiments of the present application, in S300, the process of determining the turned-on switch device includes the following steps:

[0091] S310, comparing the current voltage value with the pre-on voltage range, and determining whether the current voltage value is within any of the pre-on voltage ranges.

[0092] S311: If yes, then any one of the multiple switching devices is selected as the turned-on switching device.

[0093] In S310 , the current voltage value is compared with the pre-on voltage ranges corresponding to the plurality of switch devices to confirm whether the current voltage value is within any of the pre-on voltage ranges.

[0094] In S311, when the current voltage value is within any pre-on voltage range, it is considered that the current voltage value is close to the zero crossing point, and then any one of the multiple switching devices can be selected as the on switching device, that is, as the target switching device.

[0095] Through S310 to S311, in view of the fact that all application devices use the same type of switching devices and the values ​​of the pre-conduction voltage ranges of multiple switching devices are similar, the target switching device is quickly determined to improve the conduction efficiency.

[0096] In some embodiments of the present application, in S300, the process of determining the turned-on switching device includes the following steps:

[0097] S320, comparing the current voltage value with the pre-on voltage range, and determining whether the current voltage value is within any of the pre-on voltage ranges.

[0098] S321, if yes, determine the pre-on voltage range that is closest to the current voltage value, set the pre-on voltage range as the target voltage range, and use the switch device corresponding to the target voltage range as the turned-on switch device.

[0099] In S320, the current voltage value is compared with the pre-on voltage range to determine whether the current voltage value is within any of the pre-on voltage ranges.

[0100] In S321, when the current voltage value is within any pre-on voltage range, it is considered that the current voltage value is close to the zero point, and the range voltage value closest to the current voltage value can be determined. The closest pre-on voltage range is determined through the range voltage value, and the pre-on voltage range is used as the target voltage range. The switching device corresponding to the target voltage range is used as the turned-on switching device, that is, as the target switching device.

[0101] Through S320 to S321, when the application equipment does not use the same type of switching devices or there are parameter differences in the actual use of each switching device, and there are differences in the values ​​of the pre-conduction voltage range corresponding to multiple switching devices, the appropriate target switching device can be accurately determined to improve the conduction efficiency and the accuracy of the control module regulation.

[0102] In some embodiments of the present application, the zero-crossing detection module detects a zero-crossing point including the following steps:

[0103] S510, rectifying the input AC signal through a rectifier to obtain a rectified signal.

[0104] S520, performing current limiting and voltage stabilization processing on the rectified signal through a current limiting resistor and a voltage stabilizing diode.

[0105] S530, when the rectified signal is smaller than the sum of the withstand voltage of the voltage-stabilizing diode and the conduction voltage drop of the light-emitting diode, the light-emitting diode is not turned on, and it is determined that a zero-crossing point is detected.

[0106] In this embodiment, the rectifier processes the AC input signal into a rectified signal, and the rectified signal is processed by a current limiting resistor and a voltage stabilizing diode in sequence. The collector of the phototransistor of the optocoupler is electrically connected to the power supply end. When the rectified signal is less than the sum of the withstand voltage of the voltage stabilizing diode and the conduction voltage drop of the light-emitting diode, the light-emitting diode does not conduct, and a high-level signal is output at this time to determine that the zero crossing point is detected.

[0107] In some embodiments of the present application, the zero-crossing conduction method of the switch tube further includes:

[0108] Detect the peak voltage V of the rectified signal p , and obtain the withstand voltage value V of the Zener diode D , LED voltage drop V U and the conduction current IU of the light emitting diode;

[0109] According to the peak voltage V p , Withstand voltage V D , voltage drop V U And the conduction current IU, through the resistance value to determine the formula

[0110] R1=V p -V D -V U / IU

[0111] , calculate the resistance value R1 of the current limiting resistor to determine a suitable current limiting resistor, and form a zero-crossing detection module capable of executing the above method. The current limiting resistor may be an adjustable resistor.

[0112] The above-mentioned zero-crossing conduction method of the switch tube can be applied to the use scenarios of multiple high-frequency switch devices of an induction cooker.

[0113] The embodiment of the present application also provides a switch tube zero-crossing conduction system, which can implement the above-mentioned switch tube zero-crossing conduction method, and the system includes: a data acquisition module, a data setting module, an instruction response module, an amplification drive module and a saturation drive module;

[0114] The data acquisition module can acquire the turn-on delay duration corresponding to the plurality of switch devices.

[0115] The data setting module can detect the input AC signal and set the pre-conduction voltage range of the zero-crossing point of the AC signal according to the AC signal and the turn-on delay time;

[0116] The command response module can obtain the current voltage value of the AC signal when receiving the conduction command, determine the switch device to be turned on according to the current voltage value and the pre-conduction voltage range, and record the switch device as the target switch device;

[0117] The amplification driving module can control the driving module to drive the target switch device so that the target switch device is in an amplification state;

[0118] The saturation driving module can control the driving module to drive the target switching device when the zero-crossing detection module detects a zero-crossing point, so that the target switching device is in a saturation state.

[0119] It can be understood that the contents of the above method embodiments are all applicable to the present system embodiments, the functions specifically implemented by the present system embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0120] The embodiment of the present application also provides an electronic device, the electronic device includes a memory and a processor, the memory stores a computer program, and the processor implements the above-mentioned zero-crossing conduction method of the switch tube when executing the computer program. The electronic device can be any intelligent terminal including a tablet computer, a car computer, etc.

[0121] It can be understood that the contents of the above method embodiments are all applicable to the present device embodiments, the functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0122] See also Figure 3 , Figure 3 The hardware structure of an electronic device of another embodiment is illustrated, and the electronic device includes:

[0123] The processor 901 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application.

[0124] The memory 902 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 902 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 902, and the processor 901 calls and executes the zero-crossing conduction method of the switch tube in the embodiment of the present application;

[0125] Input / output interface 903, used to implement information input and output;

[0126] Communication interface 904, used to realize communication interaction between the device and other devices, which can be realized through wired mode (such as USB, network cable, etc.) or wireless mode (such as mobile network, WI FI, Bluetooth, etc.);

[0127] A bus 905 that transmits information between various components of the device (e.g., the processor 901, the memory 902, the input / output interface 903, and the communication interface 904);

[0128] The processor 901 , the memory 902 , the input / output interface 903 and the communication interface 904 are connected to each other in communication within the device via a bus 905 .

[0129] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the above-mentioned zero-crossing conduction method of the switch tube is implemented.

[0130] It can be understood that the contents of the above method embodiments are all applicable to the present storage medium embodiments, the functions specifically implemented by the present storage medium embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0131] The memory, as a non-transient computer-readable storage medium, can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory may optionally include a memory remotely disposed relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0132] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Those skilled in the art will appreciate that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0133] Those skilled in the art will appreciate that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0134] The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place or distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0135] Those skilled in the art will appreciate that all or some of the steps in the methods disclosed above, and the functional modules / units in the systems and devices may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0136] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the above modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0137] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but the scope of the rights of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present invention should be within the scope of the rights of the present invention.

Claims

1. A method for conducting a switch tube at zero crossing, characterized in that: Applied to a detection device, the device comprises: a zero-crossing detection module, a driving module and a plurality of switch devices; the zero-crossing detection module is used to detect the zero-crossing point of an input AC signal, the driving module is connected to the plurality of switch devices, and the driving module is used to control the on and off of the plurality of switch devices; The method comprises: Obtaining a turn-on delay time corresponding to a plurality of the switch devices; Detecting an input AC signal, and setting a pre-on voltage range of a zero-crossing point of the AC signal according to the AC signal and the turn-on delay time; When a turn-on instruction is received, a current voltage value of the AC signal is acquired, and a switch device to be turned on is determined according to the current voltage value and the pre-turn-on voltage range, and the switch device is recorded as a target switch device; Controlling the driving module to drive the target switch device so that the target switch device is in an amplified state; When the zero-crossing detection module detects a zero-crossing point, the driving module is controlled to drive the target switching device so that the target switching device is in a saturation state.

2. The zero-crossing conduction method for a switch tube according to claim 1, characterized in that: The obtaining of the turn-on delay durations corresponding to the plurality of switch devices comprises: Controlling the driving module to send a test conduction signal to the plurality of switch devices, and recording the sending time of the test conduction signal; The conduction time of the plurality of switch devices is obtained, and the turn-on delay time is determined according to the conduction time and the transmission time.

3. The zero-crossing conduction method for a switch tube according to claim 1, characterized in that: The zero-crossing detection module includes: a rectifier, a photoelectric coupler, a current-limiting resistor and a voltage-stabilizing diode, wherein the rectifier is connected to the anode of the light-emitting diode of the photoelectric coupler through the current-limiting resistor and the voltage-stabilizing diode; the zero-crossing detection process specifically includes: The input AC signal is rectified by the rectifier to obtain a rectified signal; The rectified signal is subjected to current limiting and voltage stabilization processing by means of the current limiting resistor and the voltage stabilizing diode; When the rectified signal is smaller than the sum of the withstand voltage of the voltage stabilizing diode and the conduction voltage drop of the light emitting diode, the light emitting diode is not turned on, confirming that the zero crossing point is detected.

4. The zero-crossing conduction method for a switch tube according to claim 1, characterized in that: The pre-on voltage range of setting the zero-crossing point of the AC signal according to the AC signal and the turn-on delay time includes: Determining an AC voltage waveform according to the AC signal; According to the start-up delay time and the AC voltage waveform, a range voltage value is determined with the zero-crossing point as the target voltage; The pre-turn-on voltage range corresponding to the plurality of switching devices is determined according to the range voltage value.

5. The zero-crossing conduction method for a switch tube according to claim 4, characterized in that: The step of determining the switch device to be turned on according to the current voltage value and the pre-turn-on voltage range comprises: Comparing the current voltage value with the pre-on voltage range, and determining whether the current voltage value is within any of the pre-on voltage ranges; If so, one switching device is randomly selected from the plurality of switching devices as the switching device to be turned on.

6. The zero-crossing conduction method for a switch tube according to claim 3, characterized in that: Also includes: Detect the peak voltage V of the rectified signal p , and obtain the withstand voltage value V of the voltage regulator diode D , the voltage drop V of the light emitting diode U and the conduction current IU of the light emitting diode; According to the peak voltage V p , the withstand voltage value V D , the voltage drop V U and the conduction current IU, the resistance value is determined by the formula R1 = V p -V D -V U / IU, calculate the resistance value R1 of the current limiting resistor.

7. The zero-crossing conduction method for a switch tube according to claim 1, characterized in that: The start-up delay time length is a preset start-up delay time length.

8. A switch tube zero-crossing conduction system, characterized in that: Applied to a detection device, the device comprises: a zero-crossing detection module, a driving module and a plurality of switch devices; the zero-crossing detection module is used to detect the zero-crossing point of an input AC signal, the driving module is connected to the plurality of switch devices, and the driving module is used to control the on and off of the plurality of switch devices; the system comprises: A data acquisition module, used to acquire the turn-on delay duration corresponding to the plurality of switch devices; A data setting module, used for detecting an input AC signal, and setting a pre-on voltage range of a zero-crossing point of the AC signal according to the AC signal and the turn-on delay time; An instruction response module, configured to obtain a current voltage value of the AC signal when receiving a conduction instruction, determine a switch device to be turned on according to the current voltage value and the pre-conduction voltage range, and record the switch device as a target switch device; an amplification driving module, used for controlling the driving module to drive the target switch device so that the target switch device is in an amplification state; The saturation driving module is used to control the driving module to drive the target switching device when the zero-crossing detection module detects a zero-crossing point, so that the target switching device is in a saturation state.

9. An electronic device, characterized in that: The electronic device comprises a memory and a processor, the memory stores a computer program, and the processor implements the method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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