CN111952946A - Surge current suppression circuit, control method and device and electronic equipment - Google Patents
Surge current suppression circuit, control method and device and electronic equipment Download PDFInfo
- Publication number
- CN111952946A CN111952946A CN201910403213.1A CN201910403213A CN111952946A CN 111952946 A CN111952946 A CN 111952946A CN 201910403213 A CN201910403213 A CN 201910403213A CN 111952946 A CN111952946 A CN 111952946A
- Authority
- CN
- China
- Prior art keywords
- voltage
- information
- input voltage
- power supply
- relay switch
- 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
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The embodiment of the application discloses a surge current suppression circuit, a control method, a control device and electronic equipment. The circuit comprises: the device comprises an AC (alternating current) power supply, a relay switch, a protective resistor connected with the relay switch in parallel, a rectifier bridge, a filter capacitor, an AC voltage detection module, a capacitor voltage detection module and a controller; the controller is used for controlling the on-off of the relay switch according to the input voltage information of the alternating current power supply, the voltage information of the filter capacitor, the pre-stored voltage drop information of the protection resistor and the voltage drop information of the rectifier bridge, which are received in real time, so as to restrain surge current when the input voltage is at a peak value. According to the technical scheme, when the input voltage is at the peak value, whether the filter capacitor is full is judged, and whether the relay switch is conducted or not is determined according to the judgment, so that the surge current generated when the peak value of the power grid is suppressed, and the more comprehensive surge current suppression of the circuit is realized.
Description
Technical Field
The embodiment of the application relates to the technical field of circuit protection, in particular to a surge current suppression circuit, a control method and a control device and electronic equipment.
Background
With the development and progress of the full-direct-current frequency conversion technology, the application of the full-direct-current frequency conversion technology in household appliances is more and more extensive. The direct current frequency conversion board is used as the core of the direct current frequency conversion technology, and a circuit of the direct current frequency conversion board often has a capacitor with a larger capacity as a filtering energy storage element. After the capacitors are kept still for a long time, internal charges can be slowly consumed to reach the condition close to no voltage, and when the direct current frequency conversion plate is electrified again, very large charging current can be generated to form surge current between an external power grid and the capacitors of the frequency conversion plate. On one hand, the surge current can affect the stability of the power grid, further affect the normal use of other equipment in the power grid and even cause the burning of equipment circuits; on the other hand, the bridge rectifier of the direct current frequency conversion plate can be burnt, and discharge is generated at the accessory of the wiring terminal, so that the risk of fire is caused.
In view of the above problems, in a dc converter circuit, a large number of PTC elements, power resistors or thyristor devices are used as power-on bypass elements to suppress power-on surge current. Referring to fig. 1, in the conventional surge suppression circuit, when the MCU is powered on, the driving circuit is controlled by the MCU to drive the relay S1 to be turned off, the current is suppressed by the R1, so that the capacitor is slowly charged, and when the MCU calculates that the capacitor is almost full of voltage, the relay is turned on, the R1 is bypassed, and the dc converter board enters a normal working state. The relay is turned on in a delayed mode, and the suppression of the electrifying surge current of the direct current frequency conversion board is realized in a mode of turning on the relay S1 in a delayed mode. However, in the conventional power-on inrush current suppression circuit, the MCU only roughly estimates that the capacitor is approximately full, and since the peak value of the input voltage of the circuit and the current stored voltage value of the capacitor cannot be detected, there is no way to turn on the relay S1 exactly when the capacitor is full. At this time, if the relay S1 is just turned on at the peak of the power grid, since a large potential difference still exists between the input peak of the power grid and the voltage currently stored in the capacitor, a large surge current still occurs at this time, and the stability of the power grid is further affected.
Disclosure of Invention
The embodiment of the application provides a surge current suppression circuit, a control method, a control device and electronic equipment, which can avoid the situation that surge current is generated when a power grid is in a peak value state.
In a first aspect, an embodiment of the present application provides an inrush current suppression circuit, including:
the device comprises an alternating current power supply, a relay switch, a protective resistor connected with the relay switch in parallel, a rectifier bridge, a filter capacitor, an alternating current voltage detection module, a capacitor voltage detection module and a controller;
the first end of the alternating current power supply is connected with the first end of the output loop of the relay switch, the second end of the output loop of the relay switch is connected with the first alternating current end of the rectifier bridge, and the input loop of the relay switch is connected with the control output end of the controller; two ends of the filter capacitor are respectively connected with a first direct current end and a second direct current end of the rectifier bridge, and a second end of the alternating current power supply is connected with a second alternating current end of the rectifier bridge; the controller is in signal connection with the alternating voltage detection module and the capacitor voltage detection module, the alternating voltage detection module is used for collecting input voltage information of the alternating current power supply in real time, and the capacitor voltage detection module is used for collecting voltage information of the filter capacitor in real time;
the controller is used for controlling the on-off of the relay switch according to the input voltage information of the alternating current power supply, the voltage information of the filter capacitor, the pre-stored voltage drop information of the protection resistor and the voltage drop information of the rectifier bridge, which are received in real time, so as to restrain surge current when the input voltage is at a peak value.
In a second aspect, an embodiment of the present application provides a control method for an inrush current suppression circuit, where a controller is used to implement the control method, where the control method includes:
acquiring input voltage information of an alternating current power supply and voltage information of a filter capacitor in real time;
when the input voltage of the alternating current power supply is detected to be at a peak value, according to prestored voltage drop information of a protection resistor and voltage drop information of a rectifier bridge, if the sum of the voltage value of the filter capacitor, the voltage drop of the protection resistor and the voltage drop of the rectifier bridge is equal to the peak value input voltage of the alternating current power supply, a relay switch is controlled to be conducted to bypass the protection resistor.
Preferably, after the controlling the relay switch to be turned on to bypass the protection resistor, the method further includes: and according to the input voltage information of the AC power supply collected in real time, if judging that the input voltage is disconnected, controlling to close the rear-stage load and disconnecting the relay switch.
Preferably, the judgment that the input voltage is disconnected is based on that the controller continuously detects that the peak input voltages of two periods are both 0, and the judgment is that the input voltage is disconnected.
Preferably, the pre-stored voltage drop information of the protection resistor and the voltage drop information of the rectifier bridge are obtained by matching voltage drop parameter information of the corresponding device with actual test correction.
In a third aspect, an embodiment of the present application provides a control device of an inrush current suppression circuit, including:
the acquisition module is used for acquiring input voltage information of the alternating current power supply and voltage information of the filter capacitor in real time;
and the conduction module is used for controlling the relay switch to be conducted to bypass the protection resistor if the sum of the voltage value of the filter capacitor, the voltage drop of the protection resistor and the voltage drop of the rectifier bridge is equal to the peak input voltage of the alternating current power supply according to prestored voltage drop information of the protection resistor and voltage drop information of the rectifier bridge when the input voltage of the alternating current power supply is detected to be at the peak value.
Preferably, the power supply further comprises a circuit breaking module, which is used for controlling to close the rear-stage load and to disconnect the relay switch if the input voltage is judged to be disconnected according to the input voltage information of the alternating-current power supply collected in real time.
Preferably, the conduction module includes a determination unit configured to determine that the input voltage is turned off when the controller continuously detects that the peak input voltages of two cycles are both 0.
Preferably, the conduction module further includes a pre-storage unit, configured to obtain pre-stored voltage drop information of the protection resistor and voltage drop information of the rectifier bridge according to voltage drop parameter information of a corresponding device in cooperation with actual test correction.
In a fourth aspect, an embodiment of the present application provides an electronic device, including an inrush current suppression circuit, where the inrush current suppression circuit is configured to suppress an electrification inrush current of a dc converter board, and the inrush current suppression circuit is the inrush current suppression circuit according to the first aspect.
This application embodiment is through the input voltage information of real-time collection alternating current power supply and filter capacitor's voltage information, combines the voltage drop information of the protective resistance who prestores and rectifier bridge's voltage drop information, when input voltage is in the peak value, judges filter capacitor whether full of to this decides whether relay switch switches on, surge current who produces when restraining the electric wire netting peak value, realizes restraining the more comprehensive surge current of circuit, avoids surge current to influence circuit safety.
Drawings
FIG. 1 is a prior art electrical surge current suppression circuit diagram;
fig. 2 is a schematic diagram of an inrush current suppression circuit according to a first embodiment of the present application;
fig. 3 is a schematic flowchart of a control method of an inrush current suppression circuit according to a second embodiment of the present application;
FIG. 4 is a schematic diagram of the peak input voltage of the second embodiment of the present application;
FIG. 5 is a schematic diagram of the peak input voltage at the second breakpoint of the embodiment of the present application;
fig. 6 is a schematic structural diagram of a control device of an inrush current suppression circuit according to a third embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, specific embodiments of the present application will be described in detail with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present application are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
The surge current suppression scheme provided by the application is mainly applied to full direct current frequency conversion equipment and aims at achieving surge current suppression of a full direct current frequency conversion circuit. Whether the filter capacitor is full of is judged through detection, whether the relay switch is switched on is judged through the judgment, and when the relay switch is switched on, the situation that the peak value input voltage and the current stored voltage of the capacitor have large potential difference due to the fact that the input voltage is at the peak value and the voltage of the filter capacitor is too low, and then surge current is caused is avoided. Referring to fig. 1, in the surge suppression circuit of the conventional dc converter board, only the power-on surge current is suppressed, and whether the capacitor is fully charged is estimated only roughly by the charging time, and it is not possible to determine whether the filter capacitor is fully charged by real-time and actual detection. Then the relay switch S1 is turned on at this point after a simple conclusion is made that the capacitor is full. However, since the capacitor may have a larger voltage drop with the temperature rise during the charging process, the time for the capacitor to be fully charged is long, and it is estimated that the capacitor is fully charged according to the time, but the capacitor is not fully charged due to the influence of the resistor R1. Then at grid peak, if relay switch S1 is switched on, there may be a surge current condition due to the capacitor not being full at this time. Therefore, it is necessary to accurately determine whether the filter capacitor is fully charged, and when the filter capacitor is fully charged, the peak voltage of the input power grid cannot make the rectifier bridge diode conduct in the forward direction any more, and no charging current exists.
Implementing one step:
fig. 2 shows a schematic diagram of an inrush current suppression circuit provided in an embodiment of the present application, where the inrush current suppression circuit provided in this embodiment is mainly applied to a full dc converter circuit of a dc converter to achieve inrush current suppression in the circuit. Referring to fig. 2, the inrush current suppression circuit specifically includes: the device comprises an alternating current power supply AC, a relay switch S1, a protective resistor R1 connected with the relay switch in parallel, a rectifier bridge, a filter capacitor C, an alternating current voltage detection module, a capacitor voltage detection module and a controller MCU; a first end of an alternating current power supply AC is connected with a first end of an output loop of the relay switch S1, a second end of the output loop of the relay switch S1 is connected with a first alternating current end of the rectifier bridge, and an input loop of the relay switch S1 is connected with a control output end of the controller MCU; two ends of the filter capacitor C are respectively connected with a first direct current end and a second direct current end of the rectifier bridge, and a second end of the alternating current power supply is connected with a second alternating current end of the rectifier bridge; the controller MCU is in signal connection with the alternating voltage detection module and the capacitor voltage detection module, the alternating voltage detection module is used for collecting input voltage information of an alternating current power supply AC in real time, and the capacitor voltage detection module is used for collecting voltage information of a filter capacitor C in real time. The controller MCU is used for driving and controlling the on-off of the relay switch S1 through the driving circuit according to input voltage information of the alternating current power supply AC, voltage information of the filter capacitor C, pre-stored voltage drop information of the protective resistor R1 and voltage drop information of the rectifier bridge which are received in real time, so that surge current when the input voltage is at the peak value is restrained. In the initial state of the circuit, the relay switch is opened, and the protective resistor R1 is connected into the loop. When the input voltage of the alternating current power supply AC is positive half cycle, rectifier bridge diodes D1 and D3 are conducted, rectifier bridge diodes D2 and D4 are cut off, and the alternating current power supply AC, a protective resistor R1, a rectifier bridge diode D1, a filter capacitor C and a rectifier bridge diode D3 form a circuit loop in the circuit; when the input voltage of the alternating current power supply AC is negative half cycle, the rectifier bridge diodes D2 and D4 are conducted, the rectifier bridge diodes D1 and D3 are cut off, and the alternating current power supply AC, the rectifier bridge diode D2, the filter capacitor C, the rectifier bridge diode D4 and the protective resistor R1 form a circuit loop in the circuit. The alternating current input voltage is rectified by the rectifier bridge and then charges the filter capacitor C. In the charging process, due to the existence of the protection resistor R1, the charging current of the filter capacitor C is inhibited by the protection resistor R1, and the filter capacitor C is slowly charged. And then, after the filter capacitor C is determined to be full, the relay switch S1 connected with the protective resistor R1 in parallel is turned on at the moment, and the protective resistor R1 is bypassed, so that the direct-current frequency conversion board enters a normal working state to supply power to a rear-stage load. In order to accurately judge the time when the filter capacitor C is full to ensure that surge current can be inhibited when the input voltage is at the peak value, the embodiment of the application accurately judges whether the filter capacitor C is full through the controller, and the controller switches on the relay switch through the driving circuit after the filter capacitor C is determined to be full, so that the condition of circuit surge when the input voltage is at the peak value is avoided.
Specifically, the alternating current input voltage and the filter capacitor voltage are detected in real time by adding an alternating current voltage detection module and a capacitor voltage detection module, the alternating current input voltage is connected to the L, N poles of an alternating current power supply AC, the attenuation network attenuates 220V sine wave voltage between L, N to sine wave voltage within 3.3V in an equal proportion in a resistance voltage division mode, the attenuated voltage signal is input to an AD port of a controller MCU, and the controller MCU tracks the peak value of the alternating current input voltage in real time through the AD port. The voltage detection module detects the voltage at two ends of the filter capacitor C, the attenuated filter capacitor voltage is input into an AD port of the controller MCU through the attenuation network, and the controller MCU tracks the filter capacitor voltage in real time through the AD port. At the moment of electrifying the direct-current frequency conversion board, the controller MCU controls the relay switch S1 to keep an off state, and at the moment, the current charges the rear-stage filter capacitor C through the R1. In the charging process, the capacitor voltage detection module detects that the capacitor voltage gradually rises. When the capacitor voltage detection module detects that the capacitor voltage DCbus and the peak value Vp detected by the alternating voltage detection module have the following relation:
DCbus＝Vp-Voffset
wherein, DCbusIs the capacitor voltage, VpIs the peak input voltage, VoffsetVoltage drop V for protecting resistor R1 and rectifier bridgerAnd Vd。
The capacitor is now fully charged. Since the condition for charging the capacitor is VpNeed > DCbusAnd R1 and the rectifier bridge diode have own voltage drop V in the circuitrAnd Vd，VrAnd VdCan be obtained by looking up the voltage drop parameter of the device specification and correcting the actual test, so that only V needs to be satisfiedp＝Vr+Vd+DCbusIt can represent that the rear-stage capacitor is fully charged, and at this time, the peak voltage input into the power grid can no longer make the rectifier bridge diode forward-conduct, and the charging current can no longer be used. At this time, the MCU controls the relay to be conducted without any risk. Therefore, the situation that surge current still exists when the relay is conducted at the peak value of the power grid can be solved.
Above-mentioned, through the input voltage information of real-time collection alternating current power supply and filter capacitor C's voltage information, combine the voltage drop information of the protection resistance who prestores and the voltage drop information of rectifier bridge, when input voltage is in the peak value, judge whether filter capacitor C has been full of to this decides whether relay switch switches on, with the surge current that produces when restraining the electric wire netting peak value, realizes the surge current suppression more comprehensive to the circuit, avoids surge current to influence circuit safety.
Example two:
the second embodiment of the present application provides a flowchart of a control method of an inrush current suppression circuit, the control method being applied to the inrush current suppression circuit of the first embodiment, and the control method being executed by a controller. Referring to fig. 3, the method for controlling the inrush current suppression circuit provided in this embodiment specifically includes:
s210, collecting input voltage information of the alternating current power supply and voltage information of the filter capacitor in real time.
Illustratively, the alternating voltage detection module and the capacitor voltage detection module respectively detect input voltage information of the alternating current power supply and voltage information of the filter capacitor, and finally, the acquired voltage information is acquired through an AD port of the controller MCU and is compared and judged according to the acquired information.
And S220, when the input voltage of the alternating current power supply is detected to be at the peak value, controlling a relay switch to be conducted to bypass the protection resistor according to prestored voltage drop information of the protection resistor and voltage drop information of the rectifier bridge and if the sum of the voltage value of the filter capacitor, the voltage drop of the protection resistor and the voltage drop of the rectifier bridge is equal to the peak value input voltage of the alternating current power supply.
Illustratively, referring to fig. 4, the ac voltage detection module samples at each peak of the input voltages T1, T2, T3, and T4 to obtain a peak V of each input voltagepAnd the controller MCU judges whether to switch on the relay according to the acquired information. Referring to the first embodiment, it is determined whether the peak value Vp detected by the capacitor voltage DCbus and the ac voltage detection module at this time satisfies Vp＝Vr+Vd+DCbusSince the condition for charging the capacitor is VpNeed > DCbusAnd R1 and the rectifier bridge diode have own voltage drop V in the circuitrAnd Vd，VrAnd VdCan be obtained by looking up the voltage drop parameter of the device specification and correcting the actual test, so that only V needs to be satisfiedp＝Vr+Vd+DCbusIt can represent that the rear-stage capacitor is full, and at this moment, the peak voltage input into the power grid can not make the rectifier bridge diode conduct in forward direction any more, and can not be charged any moreAn electrical current. At this time, the MCU controls the relay to be conducted without any risk. Therefore, the situation that surge current still exists when the relay is conducted at the peak value of the power grid can be solved.
And S230, according to the input voltage information of the alternating current power supply collected in real time, if the input voltage is judged to be disconnected, controlling to close the rear-stage load and disconnecting the relay switch.
For example, when the ac power supply is powered up again after being disconnected, since the filter capacitor end discharges part of or even all of the electricity, and the relay is not disconnected at this time, the next power-up cycle may be caused, and the protective resistor R1 is bypassed by the relay, so that a large inrush current is generated again. Therefore, after the ac power supply is confirmed to be off, the relay needs to be turned off so that the protection resistor R1 is not bypassed at the next power-on, and the inrush current can be suppressed. The controller MCU may determine whether the input voltage has been disconnected by detecting the peak value of the input voltage for 2 consecutive cycles when the AC power source AC is disconnected. When the controller MCU continuously detects that the voltage peak value of 2 periods is 0, namely the input voltage is judged to be disconnected, the rear-stage load is immediately closed at the moment, the charge stored in the capacitor is prevented from being consumed, and the relay switch S1 is disconnected, so that the condition that the power grid is immediately recovered after 2 periods is prevented. Since the relay switch S1 is turned off, part of the charge is still stored in the filter capacitor, and if the power grid is recovered in the 3 rd cycle, the surge current is effectively suppressed. Referring to fig. 5, in a time period T1, the input power grid is powered down for 2 cycles, the controller MCU continuously detects that there is no voltage peak for 2 cycles, determines that the power grid is powered down, immediately controls to turn off the relay, and when the power grid recovers after the 2 nd cycle, the surge current is suppressed by the protection resistor R1.
Above-mentioned, through the input voltage information of real-time collection alternating current power supply and filter capacitor's voltage information, combine the voltage drop information of the protective resistance who prestores and the voltage drop information of rectifier bridge, when input voltage is in the peak value, judge whether filter capacitor has been full of to this decides whether relay switch switches on, surge current who produces when with the suppression electric wire netting peak value realizes suppressing the surge current more comprehensive to the circuit, avoids surge current to influence circuit safety.
EXAMPLE III
On the basis of the foregoing embodiment, fig. 6 is a schematic structural diagram of a control device of an inrush current suppression circuit according to a third embodiment of the present application. Referring to fig. 6, the control device of the inrush current suppression circuit provided in this embodiment specifically includes: an acquisition module 210 and a conduction module 220.
The collecting module 210 is configured to collect input voltage information of the ac power supply and voltage information of the filter capacitor in real time; the conduction module 220 is configured to, when it is detected that the input voltage of the ac power supply is at a peak value, control the relay switch to be turned on to bypass the protection resistor according to pre-stored voltage drop information of the protection resistor and voltage drop information of the rectifier bridge, if a sum of the voltage value of the filter capacitor, the voltage drop of the protection resistor, and the voltage drop of the rectifier bridge is equal to the peak input voltage of the ac power supply.
Above-mentioned, through the input voltage information of real-time collection alternating current power supply and filter capacitor's voltage information, combine the voltage drop information of the protective resistance who prestores and the voltage drop information of rectifier bridge, when input voltage is in the peak value, judge whether filter capacitor has been full of to this decides whether relay switch switches on, surge current who produces when with the suppression electric wire netting peak value realizes suppressing the surge current more comprehensive to the circuit, avoids surge current to influence circuit safety.
Specifically, the system further includes a circuit breaking module 230, configured to control to turn off the rear stage load and turn off the relay switch if it is determined that the input voltage is disconnected according to the input voltage information of the ac power source collected in real time.
Specifically, the connection module 220 includes a determining unit, configured to determine that the input voltage is disconnected when the controller continuously detects that the peak input voltage of two periods is 0.
Specifically, the conducting module 220 further includes a pre-storing unit, configured to obtain pre-stored voltage drop information of the protection resistor and voltage drop information of the rectifier bridge according to the voltage drop parameter information of the corresponding device and by matching with an actual test and correcting.
The control device of the inrush current suppression circuit provided by the third embodiment of the application can be used for executing the control method of the inrush current suppression circuit provided by the second embodiment, and has corresponding functions and beneficial effects.
Example four:
the fourth embodiment of the present application provides an electronic device, which includes an inrush current suppression circuit, where the inrush current suppression circuit is configured to suppress a power-on inrush current of a dc converter board, and the inrush current suppression circuit is the inrush current suppression circuit provided in the first embodiment of the present application. The electronic equipment can be an electronic equipment using full direct current frequency conversion technology, such as a refrigerator, an air conditioner, a microwave oven and the like, and can well suppress surge current during electrification and power grid peak values through a surge suppression circuit of a direct current frequency conversion plate.
The electronic device provided above is further configured to execute the control method of the inrush current suppression circuit provided in the second embodiment, and has corresponding functions and beneficial effects.
Example five:
embodiments of the present application also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a method for controlling an inrush current suppression circuit, where the method for controlling the inrush current suppression circuit includes: acquiring input voltage information of an alternating current power supply and voltage information of a filter capacitor in real time;
when the input voltage of the alternating current power supply is detected to be at the peak value, according to prestored voltage drop information of a protection resistor and voltage drop information of a rectifier bridge, if the sum of the voltage value of the filter capacitor, the voltage drop of the protection resistor and the voltage drop of the rectifier bridge is equal to the peak value input voltage of the alternating current power supply, the relay switch is controlled to be conducted to bypass the protection resistor
Storage medium-any of various types of memory devices or storage devices. The term "storage medium" is intended to include: mounting media such as CD-ROM, floppy disk, or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Lanbas (Rambus) RAM, etc.; non-volatile memory such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. In addition, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system connected to the first computer system through a network (such as the internet). The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media that may reside in different locations, such as in different computer systems that are connected by a network. The storage medium may store program instructions (e.g., embodied as a computer program) that are executable by one or more processors.
Of course, the storage medium containing the computer-executable instructions provided in the embodiments of the present application is not limited to the control method of the inrush current suppression circuit described above, and may also perform related operations in the control method of the inrush current suppression circuit provided in any embodiments of the present application.
The control device, the storage medium, and the electronic device of the inrush current suppression circuit provided in the above embodiments may execute the control method of the inrush current suppression circuit provided in any of the embodiments of the present application, and reference may be made to the control method of the inrush current suppression circuit provided in any of the embodiments of the present application without detailed technical details described in the above embodiments.
The foregoing is considered as illustrative of the preferred embodiments of the invention and the technical principles employed. The present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the claims.
Claims (10)
1. An inrush current suppression circuit, comprising: the device comprises an alternating current power supply, a relay switch, a protective resistor connected with the relay switch in parallel, a rectifier bridge, a filter capacitor, an alternating current voltage detection module, a capacitor voltage detection module and a controller;
the first end of the alternating current power supply is connected with the first end of the output loop of the relay switch, the second end of the output loop of the relay switch is connected with the first alternating current end of the rectifier bridge, and the input loop of the relay switch is connected with the control output end of the controller; two ends of the filter capacitor are respectively connected with a first direct current end and a second direct current end of the rectifier bridge, and a second end of the alternating current power supply is connected with a second alternating current end of the rectifier bridge; the controller is in signal connection with the alternating voltage detection module and the capacitor voltage detection module, the alternating voltage detection module is used for collecting input voltage information of the alternating current power supply in real time, and the capacitor voltage detection module is used for collecting voltage information of the filter capacitor in real time;
the controller is used for controlling the on-off of the relay switch according to the input voltage information of the alternating current power supply, the voltage information of the filter capacitor, the pre-stored voltage drop information of the protection resistor and the voltage drop information of the rectifier bridge, which are received in real time, so as to restrain surge current when the input voltage is at a peak value.
2. A control method of an inrush current suppression circuit, applied to the inrush current suppression circuit as claimed in claim 1, wherein a controller is used to implement the control method, the control method comprising:
acquiring input voltage information of an alternating current power supply and voltage information of a filter capacitor in real time;
when the input voltage of the alternating current power supply is detected to be at a peak value, according to prestored voltage drop information of a protection resistor and voltage drop information of a rectifier bridge, if the sum of the voltage value of the filter capacitor, the voltage drop of the protection resistor and the voltage drop of the rectifier bridge is equal to the peak value input voltage of the alternating current power supply, a relay switch is controlled to be conducted to bypass the protection resistor.
3. The method of controlling an inrush current suppression circuit according to claim 2, further comprising, after the controlling the relay switch to conduct to bypass the protection resistor:
and according to the input voltage information of the alternating current power supply collected in real time, if the input voltage is judged to be disconnected, controlling to close the rear-stage load and disconnecting the relay switch.
4. The method of claim 3, wherein the determining that the input voltage is off is based on the controller determining that the input voltage is off by continuously detecting that the peak input voltage for two cycles is 0.
5. The method according to claim 2, wherein the pre-stored voltage drop information of the protection resistor and the voltage drop information of the rectifier bridge are obtained by correcting voltage drop parameter information of the corresponding device in cooperation with an actual test.
6. A control device for an inrush current suppression circuit, comprising:
the acquisition module is used for acquiring input voltage information of the alternating current power supply and voltage information of the filter capacitor in real time;
and the conduction module is used for controlling the relay switch to be conducted to bypass the protection resistor if the sum of the voltage value of the filter capacitor, the voltage drop of the protection resistor and the voltage drop of the rectifier bridge is equal to the peak input voltage of the alternating current power supply according to prestored voltage drop information of the protection resistor and voltage drop information of the rectifier bridge when the input voltage of the alternating current power supply is detected to be at the peak value.
7. The control device of an inrush current suppression circuit according to claim 6, further comprising:
and the circuit breaking module is used for controlling to close the rear-stage load and disconnect the relay switch if judging that the input voltage is disconnected according to the input voltage information of the alternating-current power supply collected in real time.
8. The control device of an inrush current suppression circuit according to claim 6, wherein the conducting module comprises:
and the judging unit is used for judging that the input voltage is disconnected when the controller continuously detects that the peak value input voltage of two periods is 0.
9. The control device of an inrush current suppression circuit according to claim 6, wherein the conducting module further comprises:
and the pre-storage unit is used for matching actual test and correction according to the voltage drop parameter information of the corresponding device to obtain the pre-stored voltage drop information of the protection resistor and the pre-stored voltage drop information of the rectifier bridge.
10. An electronic device, comprising an inrush current suppression circuit for suppressing an electrifying inrush current of a direct current inverter board, wherein the inrush current suppression circuit is the inrush current suppression circuit according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910403213.1A CN111952946B (en) | 2019-05-15 | 2019-05-15 | Surge current suppression circuit, control method and device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910403213.1A CN111952946B (en) | 2019-05-15 | 2019-05-15 | Surge current suppression circuit, control method and device and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111952946A true CN111952946A (en) | 2020-11-17 |
| CN111952946B CN111952946B (en) | 2023-02-21 |
Family
ID=73336928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910403213.1A Active CN111952946B (en) | 2019-05-15 | 2019-05-15 | Surge current suppression circuit, control method and device and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111952946B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114499142A (en) * | 2022-04-14 | 2022-05-13 | 深圳市芯茂微电子有限公司 | Capacitor discharge detection method and related assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553551A (en) * | 2003-06-06 | 2004-12-08 | 中兴通讯股份有限公司 | AC inputting high-voltage protector |
| CN1728490A (en) * | 2004-07-29 | 2006-02-01 | 中兴通讯股份有限公司 | High voltage protective device for input of AC electrical source |
| CN201439976U (en) * | 2009-05-25 | 2010-04-21 | 广东志高空调有限公司 | Suppressing circuit of surge current of inverter air conditioner |
-
2019
- 2019-05-15 CN CN201910403213.1A patent/CN111952946B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553551A (en) * | 2003-06-06 | 2004-12-08 | 中兴通讯股份有限公司 | AC inputting high-voltage protector |
| CN1728490A (en) * | 2004-07-29 | 2006-02-01 | 中兴通讯股份有限公司 | High voltage protective device for input of AC electrical source |
| CN201439976U (en) * | 2009-05-25 | 2010-04-21 | 广东志高空调有限公司 | Suppressing circuit of surge current of inverter air conditioner |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114499142A (en) * | 2022-04-14 | 2022-05-13 | 深圳市芯茂微电子有限公司 | Capacitor discharge detection method and related assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111952946B (en) | 2023-02-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8369051B2 (en) | Circuit arrangement and method for increasing the safety of an electronic operating device | |
| CN102280862B (en) | Frequency converter input/output reverse connection detection protection method and device | |
| JP2012095502A (en) | Power supply circuit | |
| US20190237994A1 (en) | Uninterruptible power supply | |
| JPWO2017010031A1 (en) | Discharge device, power supply device, and discharge method | |
| CN111157831B (en) | Performance test method, device and equipment for power-on buffer resistor | |
| JP5870287B2 (en) | Circuit abnormality detection device, circuit breaker | |
| JP6265304B2 (en) | Power converter | |
| CN111952946B (en) | Surge current suppression circuit, control method and device and electronic equipment | |
| CN102497009A (en) | Bus soft start circuit of uninterrupted power supply, and method for the same | |
| CN111999662B (en) | Method for detecting external switch state of battery of UPS | |
| CN212343313U (en) | Overvoltage protection circuit of switching power supply and switching power supply | |
| CN110739672A (en) | Surge current control circuit and control method thereof | |
| CN114552710B (en) | Automatic power-off method and device for intelligent charger, electronic equipment and medium | |
| CN113765182A (en) | Electric shock prevention control method, electric shock prevention control circuit, electric shock prevention control device, medium, charging device and vehicle | |
| CN112713579A (en) | Control method and system of anti-surge circuit and air conditioning equipment | |
| CN112345904A (en) | Insulation detection circuit and detection method thereof | |
| JP5302745B2 (en) | Power supply system | |
| WO2024045370A1 (en) | Compatible power supply circuit and control method therefor, and controller and storage medium | |
| KR100308563B1 (en) | Outdoor unit power supply and method of the separate air conditioner | |
| CN217741335U (en) | Charging control circuit, power supply circuit and electric equipment | |
| CN117578698B (en) | Dual-power management device | |
| CN215498271U (en) | Control device of direct-current power supply and air conditioner | |
| CN216598984U (en) | Power input protection circuit, power circuit and air conditioner | |
| CN117674380A (en) | Compatible power supply circuit, control method thereof, controller and storage medium |
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 |