CN221103186U - Input current suppressing start control circuit - Google Patents
Input current suppressing start control circuit Download PDFInfo
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- CN221103186U CN221103186U CN202322528951.3U CN202322528951U CN221103186U CN 221103186 U CN221103186 U CN 221103186U CN 202322528951 U CN202322528951 U CN 202322528951U CN 221103186 U CN221103186 U CN 221103186U
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Abstract
An input current suppression starting control circuit comprises a main power supply device, an auxiliary power supply device and a current suppression switching module; the current-suppressing switching module comprises a normally open switch, a current suppressor, a filter capacitor, a first rectifying diode, a second rectifying diode and a single-pole double-throw switch; the first end of the normally open switch is connected with the first end of the main power supply device and the movable contact of the single-pole double-throw switch, the second end of the normally open switch is connected with the second end of the main power supply device and the second stationary contact of the single-pole double-throw switch through the current suppressor, the first stationary contact of the single-pole double-throw switch is connected with the anode of the first rectifying diode, the cathode of the first rectifying diode is connected with the cathode of the second rectifying diode, the first end of the filter capacitor and the first end of the auxiliary power supply device, and the second end of the filter capacitor is grounded; the anode of the second rectifying diode is connected with the third end of the main power supply device. The utility model can reliably start the auxiliary power supply, effectively ensure that the capacitor voltage is full, the main circuit is reliably started, avoid the influence on the EMI and has simple circuit.
Description
Technical Field
The utility model relates to the field of switching power supplies, in particular to an input current inhibition starting control circuit.
Background
Because modern electronic products are mostly powered by using a switching power supply, the capacitive load is generally charged when the switching power supply is started, and if input current is not limited, the problems of burning insurance, tripping and the like are easily caused. While for some particular applications several switching power supplies may be required to start the supply at the same time. This requires the input current to be suppressed to a smaller level to avoid tripping at start-up. The traditional starting control circuit adopts the technical scheme that a current suppressor (generally a resistor) is connected in series into the starting control circuit to charge a capacitor, the capacitor is used for starting and supplying power for an auxiliary power supply, and after the capacitor is fully charged, the auxiliary power supply controls a relay to short the current suppressor. The main power supply then starts to start. However, when the user requires less current suppression and the input voltage is also lower or the temperature is lower, the auxiliary power supply itself is difficult to start. Or because of the operation of the auxiliary power supply, a certain voltage drop is generated on the current suppressor, so that the voltage on the capacitor can not be fully charged all the time, and the main power supply can not be started all the time.
Disclosure of utility model
The utility model aims to solve the technical problems of the prior art, and provides an input current inhibition starting control circuit which can reliably start an auxiliary power supply, effectively ensure full capacitor voltage, reliably start a main circuit, avoid influencing EMI, has few devices and simple circuits due to exquisite design, has low cost and is suitable for popularization.
The technical scheme adopted for solving the technical problems is as follows: an input current suppressing start control circuit is constructed, which comprises a main power supply device connected with a main power supply, an auxiliary power supply device connected with an auxiliary power supply, and a current suppressing switching module for switching between the main power supply device and the auxiliary power supply device and suppressing input current;
The current-suppressing switching module comprises a normally open switch, a current suppressor, a filter capacitor, a first rectifying diode, a second rectifying diode and a single-pole double-throw switch; the first end of the normally open switch is connected with the first end of the main power supply device, the movable contact of the single-pole double-throw switch and the second end of the normally open switch are connected with the second end of the main power supply device and the second fixed contact of the single-pole double-throw switch through the current suppressor, the first fixed contact of the single-pole double-throw switch is connected with the anode of the first rectifying diode, the cathode of the first rectifying diode is connected with the cathode of the second rectifying diode, the first end of the filter capacitor and the first end of the auxiliary power supply device, and the second end of the filter capacitor is grounded; and the anode of the second rectifying diode is connected with the third end of the main power supply device.
In a preferred embodiment of the present utility model, the main power supply device includes an EMI suppression module, a rectification conversion module, and a first energy storage capacitor, where a first end of the first energy storage capacitor is connected to a third end of the main power supply device, and a second end of the first energy storage capacitor is grounded, and the EMI suppression module and the rectification conversion module are connected in series between the main power supply and the first energy storage capacitor.
In a preferred embodiment of the present utility model, the EMI suppression module includes a first EMI suppression unit having a first end connected to a hot line of the main power supply, a second end connected to a neutral line of the main power supply, a third end connected to the rectifying and converting module, and a fourth end connected to a first end of the main power supply device.
In a preferred embodiment of the present utility model, the EMI suppression module includes a second EMI suppression unit having a first end connected to the second end of the main power device, a zero line having a second end connected to the main power, and third and fourth ends respectively connected to the rectification conversion module.
In a preferred embodiment of the present utility model, the EMI suppression module includes a first EMI suppression unit and a second EMI suppression unit, wherein a first end of the first EMI suppression unit is connected to a live line of the main power supply, a second end of the first EMI suppression unit is connected to a neutral line of the main power supply, a third end of the first EMI suppression unit is connected to a second end of the second EMI suppression unit, a fourth end of the first EMI suppression unit is connected to a first end of the main power supply, and a first end of the second EMI suppression unit is connected to the second end of the main power supply, and a third end and a fourth end of the second EMI suppression unit are respectively connected to the rectification conversion module.
In a preferred embodiment of the utility model, further comprising a safety device connected between the line of the mains power supply and the mains power supply device.
In a preferred embodiment of the present utility model, the auxiliary power supply device includes an auxiliary power supply conversion module and a second energy storage capacitor, a first end of the second energy storage capacitor is connected to the positive electrode of the auxiliary power supply and the fourth end of the auxiliary power supply conversion module, a second end of the second energy storage capacitor is connected to the negative electrode of the auxiliary power supply and the third end of the auxiliary power supply conversion module, and a first end of the auxiliary power supply conversion module is connected to the first end and a second end of the auxiliary power supply device to ground.
The other technical scheme adopted by the utility model for solving the technical problems is as follows: an input current suppression start control circuit is constructed, and the input current suppression start control circuit comprises a main power supply device connected with a main power supply, an auxiliary power supply device connected with an auxiliary power supply, and a current suppression switching module used for switching between the main power supply device and the auxiliary power supply device and suppressing input current; the main power supply device comprises a first EMI suppression unit, a second EMI suppression unit, a rectification conversion module and a first energy storage capacitor; the auxiliary power supply device comprises an auxiliary power supply conversion module and a second energy storage capacitor; the current-suppressing switching module consists of a normally open switch, a current suppressor, a filter capacitor, a first rectifying diode, a second rectifying diode and a single-pole double-throw switch; the first end of the first EMI suppression unit is connected with a live wire of the main power supply, the second end of the first EMI suppression unit is connected with a zero line of the main power supply, the third end of the first EMI suppression unit is connected with the second end of the second EMI suppression unit, the fourth end of the first EMI suppression unit is connected with the first end of the normally open switch and the moving contact of the single-pole double-throw switch, and the second end of the normally open switch is connected with the first end of the second EMI suppression unit and the second fixed contact of the single-pole double-throw switch through the current suppressor; the first stationary contact of the single-pole double-throw switch is connected with the anode of the first rectifying diode, the cathode of the first rectifying diode is connected with the cathode of the second rectifying diode, the first end of the filter capacitor and the first end of the auxiliary power conversion module, and the second end of the filter capacitor and the second end of the auxiliary power conversion module are grounded; the third end and the fourth end of the second EMI suppression unit are respectively connected with the second end and the first end of the rectification conversion module, and the third end and the fourth end of the rectification conversion module are respectively connected with the first energy storage capacitor; the fourth end of the rectifying conversion module is connected with the anode of the rectifying diode; the third end and the fourth end of the auxiliary power supply conversion module are respectively connected with the positive electrode and the negative electrode of the auxiliary power supply, and the second energy storage capacitor is also connected between the positive electrode and the negative electrode of the auxiliary power supply.
In the utility model, the auxiliary power supply can be reliably started by using the current-suppressing switching module formed by the simple devices of the normally open switch, the current suppressor, the filter capacitor, the first rectifying diode, the second rectifying diode and the single-pole double-throw switch, so that the capacitor voltage is fully charged, the main circuit is reliably started, the influence on the EMI can be avoided, and the utility model has the advantages of few devices, simple circuit and low cost and is suitable for popularization because of exquisite design.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic block diagram of an input current inhibit start control circuit of a preferred embodiment of the present utility model;
FIG. 2 is a circuit diagram of an input current inhibit start control circuit of a preferred embodiment of the present utility model;
Fig. 3A-3E are schematic diagrams of the input current suppressing start-up control circuit shown in fig. 2.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
The utility model relates to an input current inhibition starting control circuit, which comprises a main power supply device connected with a main power supply, an auxiliary power supply device connected with an auxiliary power supply, and a current inhibition switching module used for switching between the main power supply device and the auxiliary power supply device and inhibiting input current; the current-suppressing switching module comprises a normally open switch, a current suppressor, a filter capacitor, a first rectifying diode, a second rectifying diode and a single-pole double-throw switch; the first end of the normally open switch is connected with the first end of the main power supply device, the movable contact of the single-pole double-throw switch and the second end of the normally open switch are connected with the second end of the main power supply device and the second fixed contact of the single-pole double-throw switch through the current suppressor, the first fixed contact of the single-pole double-throw switch is connected with the anode of the first rectifying diode, the cathode of the first rectifying diode is connected with the cathode of the second rectifying diode, the first end of the filter capacitor and the first end of the auxiliary power supply device, and the second end of the filter capacitor is grounded; and the anode of the second rectifying diode is connected with the third end of the main power supply device. The auxiliary power supply can be reliably started by using the current-suppressing switching module formed by the normally open switch, the current suppressor, the filter capacitor, the first rectifying diode, the second rectifying diode and the single-pole double-throw switch, the capacitor voltage is effectively ensured to be full, the main circuit is reliably started, the influence on the EMI can be avoided, and the auxiliary power supply is small in number of used devices, simple in circuit, low in cost and suitable for popularization due to exquisite design.
Fig. 1 is a schematic block diagram of an input current suppressing start-up control circuit of a preferred embodiment of the present utility model. As shown in fig. 1, the input current suppressing start control circuit of the present utility model includes a main power supply device 100 connected to a main power supply, an auxiliary power supply device 200 connected to an auxiliary power supply, and a current suppressing switching module 300 for switching between the main power supply device 100 and the auxiliary power supply device 200 and suppressing an input current.
In a preferred embodiment of the present utility model, the main power supply device 100 may include an EMI suppression unit, a rectifying conversion module, and a first energy storage capacitor. The main power device 100 is connected to a mains supply, and then a rectification and conversion module rectifies and converts an input voltage provided by the mains supply, for example, the rectification and conversion module may include a full-bridge rectification unit or a half-bridge rectification unit to rectify and may further include an inverter to perform AC/DC conversion. The rectifying conversion module may employ any rectifying circuit (e.g., diode rectifier bridge, switching tube rectifier bridge, etc.) and converting circuit (e.g., any known inverter circuit, etc.) known in the art according to actual needs. The EMI suppression unit may be provided in one, two or more, and may be connected in series with the rectification conversion module. Any known EMI suppression circuit, chip is suitable for use in the present utility model, such as an EMI filter, a parallel RC snubber circuit or an RCD snubber circuit, a series saturable core coil, which can be used as the EMI suppression circuit of the present utility model. The first energy storage capacitor is connected to the output end of the rectification conversion module so as to provide starting voltage for the rear-stage main circuit. The auxiliary power device 200 includes an auxiliary power conversion module and a second energy storage capacitor. The auxiliary power source is typically a direct current power source and the auxiliary power conversion module may typically be a DC/DC conversion module. Any known DC/DC conversion module may be suitable for use in the present utility model. Of course, the auxiliary power conversion module may further include other Boost circuits, for example. The second energy storage capacitor is connected between the auxiliary power supply conversion module and an auxiliary power supply. These prior art techniques are not described in detail herein in order not to obscure the utility model.
As can be seen in conjunction with the embodiment shown in fig. 2, the current suppressing switching module 300 includes a normally open switch K1, a current suppressor R1, a filter capacitor C2, a rectifying diode D1, a rectifying diode D2, and a single pole double throw switch K2. In a preferred embodiment of the utility model, the current suppressor R1 may be just one or more resistors. The first end of the normally open switch K1 is connected to the first end of the main POWER device 100 (i.e., the fourth end 4 of the first EMI suppression unit EMI1 in fig. 2) and the moving contact 1 of the single pole double throw switch K2, the second end is connected to the second end of the main POWER device 100 (i.e., the first end 1 of the second EMI suppression unit EMI2 shown in fig. 2) and the second fixed contact 3 of the single pole double throw switch K2 via the current suppressor R1, the first fixed contact 2 of the single pole double throw switch K2 is connected to the anode of the rectifying diode D1, the cathode of the rectifying diode D1 is connected to the cathode of the rectifying diode D2, the first end of the filter capacitor C2 and the first end of the auxiliary POWER device 200 (i.e., the first end 1 of the auxiliary POWER conversion module aux_power shown in fig. 2), and the second end of the filter capacitor C2 is grounded; the anode of the rectifying diode D2 is connected to the third terminal of the main power device 100 (i.e., the fourth terminal 4 of the rectifying and converting module RECT shown in fig. 2).
In a preferred embodiment of the present utility model, the EMI suppression module includes a first EMI suppression unit having a first end connected to a hot line of the main power supply, a second end connected to a neutral line of the main power supply, a third end connected to the rectifying and converting module, and a fourth end connected to a first end of the main power supply device.
In another preferred embodiment of the present utility model, the EMI suppression module includes a second EMI suppression unit, a first end of the second EMI suppression unit is connected to a second end of the main power device, a second end is connected to a zero line of the main power, and a third end and a fourth end are respectively connected to the rectification conversion module.
In still another preferred embodiment of the present utility model, the EMI suppression module includes a first EMI suppression unit and a second EMI suppression unit, the first EMI suppression unit having a first end connected to the hot line of the main power supply, a second end connected to the neutral line of the main power supply, a third end connected to the second end of the second EMI suppression unit, a fourth end connected to the first end of the main power supply, and the second EMI suppression unit having a first end connected to the second end of the main power supply, a third end and a fourth end respectively connected to the rectification conversion module.
In the utility model, the auxiliary power supply can be reliably started by using the current-suppressing switching module formed by the simple devices of the normally open switch, the current suppressor, the filter capacitor, the first rectifying diode, the second rectifying diode and the single-pole double-throw switch, so that the capacitor voltage is fully charged, the main circuit is reliably started, the influence on the EMI can be avoided, and the utility model has the advantages of few devices, simple circuit and low cost and is suitable for popularization because of exquisite design.
Fig. 2 is a circuit diagram of an input current suppressing start-up control circuit of a preferred embodiment of the present utility model. As shown in fig. 1-2, the input current suppressing start control circuit includes a main power supply device 100 connected to a main power supply, an auxiliary power supply device 200 connected to an auxiliary power supply, and a current suppressing switching module 300 for switching between the main power supply device 100 and the auxiliary power supply device 200 and suppressing an input current. The main power supply device 100 includes a safety device F1, a first EMI suppression unit EMI1, a second EMI suppression unit EMI2, a rectifying conversion module RECT, and an energy storage capacitor C1. The auxiliary POWER supply device 200 includes an auxiliary POWER supply conversion module aux_power and an energy storage capacitor C2. The current-suppressing switching module 300 is composed of a normally open switch K1, a current suppressor R1, a filter capacitor C2, a rectifier diode D1, a rectifier diode D2 and a single-pole double-throw switch K2.
As shown in fig. 2, a first end 1 of the first EMI suppression unit EMI1 is connected to a live line AC-L of the main power supply through a safety device F1, a second end 2 is connected to a neutral line AC-N of the main power supply, a third end 3 is connected to a second end 2 of the second EMI suppression unit EMI2, and a fourth end 4 is connected to the first end 1 of the normally open switch K1 and the movable contact 1 of the single pole double throw switch K2. The second end 2 of the normally open switch K1 is connected to the first end 1 of the second EMI suppression unit EMI2 and the second stationary contact 3 of the single pole double throw switch K2 via the current suppressor R1. The first stationary contact 2 of the single pole double throw switch K2 is connected to the anode of the rectifying diode D1, the cathode of the rectifying diode D1 is connected to the cathode of the rectifying diode D2, the first end of the filter capacitor C2 and the first end 1 of the auxiliary POWER conversion module aux_power, and the second end of the filter capacitor C2 and the second end 2 of the auxiliary POWER conversion module aux_power are grounded. The third terminal and the fourth terminal of the auxiliary POWER supply conversion module AUX_POWER are respectively connected with the positive electrode AUX_VCC and the negative electrode AUX_GND of the auxiliary POWER supply. The third end 3 and the fourth end 4 of the second EMI suppression unit EMI2 are respectively connected to the second end 2 and the first end 1 of the rectifier conversion module RECT. And a third end 3 and a fourth end 4 of the rectifying and converting module RECT are respectively connected with the energy storage capacitor C1. The fourth end 4 of the rectifying and converting module RECT is connected with the anode of the rectifying diode, and the energy storage capacitor C2 is also connected between the positive electrode aux_vcc and the negative electrode aux_gnd of the auxiliary power supply.
In a simplified embodiment of the present utility model, the first EMI suppression unit EMI1 or the second EMI suppression unit EMI2 may be omitted. When the second EMI suppression unit EMI2 is omitted, the 3 rd end of the first EMI suppression unit EMI1 is directly connected to the second end 2 of the rectifying and converting module RECT, and the first end 1 of the rectifying and converting module RECT is directly connected to the current suppressor R1. When the first EMI suppression unit EMI1 is omitted, the second end of the second EMI suppression unit EMI2 is directly connected to the neutral line AC-N of the main power supply. Which fall within the scope of the present utility model. In a further preferred embodiment of the present utility model, a greater number of EMI suppressing units may be inserted between or after the first EMI suppressing unit EMI1 or the second EMI suppressing unit EMI2. Which fall within the scope of the present utility model. In a simplified embodiment of the utility model, the safety device F1 may also be omitted. In a preferred embodiment of the present utility model, the single pole double throw switch K2 may be provided with more than one set of normally open and normally closed switches. The energy storage capacitors C1 and C6 have larger capacity. The filter capacitor C2 has a smaller capacity.
The sequence of the main circuit after the energy storage capacitor C1 is started by using the input current inhibition starting control circuit shown in fig. 2 is that current flows through the single-pole double-throw switch K2, the filter capacitor C2, the auxiliary POWER supply conversion module aux_power, the auxiliary POWER supply positive pole aux_vcc in sequence, the normally open switch K1 is closed, the energy storage capacitor C1 is charged until full through the current inhibitor R1, the single-pole double-throw switch K2 is closed, the normally open switch K1 is opened, and the main circuit after the energy storage capacitor C1 is started.
Therefore, the auxiliary power supply can be reliably started by using the current-suppressing switching module formed by the normally open switch, the current suppressor, the filter capacitor, the first rectifying diode, the second rectifying diode and the single-pole double-throw switch, the capacitor voltage is effectively ensured to be full, the main circuit is reliably started, the influence on the EMI can be avoided, and the current-suppressing switching module is small in number of used devices, simple in circuit, low in cost and suitable for popularization due to exquisite design.
Fig. 3A-3E are schematic diagrams of the input current suppressing start-up control circuit shown in fig. 2. The principle of the input current suppressing start-up control circuit shown in fig. 2 will be described below with reference to fig. 3A to 3E.
As shown in fig. 3A, the auxiliary power supply start-up process is controlled as follows. The filter capacitor C2 is charged after the input voltage. The current flows through the safety device F1, the first EMI suppression unit EMI1, the normally closed switch K2, the rectifying diode D1, the filter capacitor C2, the rectifying conversion module RECT, the second EMI suppression unit EMI2, and the first EMI suppression unit EMI1 returns to the main power supply. When the voltage of the filter capacitor C2 is enough for the auxiliary POWER supply conversion module aux_power to operate, the auxiliary POWER supply aux_vcc is converted. In this process, since the EMI loop after the current suppressor R1 is only half-way, the suppression effect of the common mode interference is provided by the first EMI suppression unit EMI1 only.
As shown in fig. 3B, the control of charging the energy storage capacitor is as follows, the auxiliary power supply still maintains power supply through the normally closed switch K2 and the rectifying diode D1, the normally open switch K1 is closed under the condition of ensuring no abnormality, the input voltage passes through the safety device F1, the first EMI suppressing unit EMI1, the normally open switch K1, the current suppressor R1, the second EMI suppressing unit EMI2 and the rectifying conversion module RECT charge the energy storage capacitor C1 until the energy storage capacitor C1 is full. In this process, since the charging current passes through the current suppressor R1, the input current is controlled within a required range, and the safety of the fuse protector F1 and the user's total gate is ensured. Meanwhile, since the auxiliary power supply energy is not from the energy storage capacitor C1, the load of the energy storage capacitor C1 is small relative to the input charge, and therefore, the auxiliary power supply energy can be ignored, and thus, the energy storage capacitor C1 can be fully charged. After full charge, no more current flows through the normally open switch K1 and the current suppressor R1 (i.e., negligible), and only the path of the auxiliary circuit remains, as shown in fig. 3C. In this process, the current of the auxiliary power supply operates in the EMI loop after the current suppressor R1, and thus the suppression effect of the common mode interference is provided only by the second EMI suppression unit EMI 2.
As shown in fig. 3D, the switching auxiliary power supply path is controlled as follows. The single-pole double-throw switch K2 is controlled to enable the normally open contact to be closed and the normally closed contact to be opened, at the moment, the power supply of the auxiliary power supply is changed into power taking from the energy storage capacitor C1, and the filter capacitor C2 is charged through the rectifier diode D2. At this time, the path of the rectifying diode D1 is disconnected, and the current passes through the safety device F1, the first EMI suppression unit EMI1, the single pole double throw switch K2, the second EMI suppression unit EMI2, the energy storage capacitor C1, the rectifying diode D2, the filter capacitor C2, the auxiliary POWER conversion module aux_power, and the energy storage capacitor C6. After the single pole double throw switch K2 is switched, the EMI loop of the current operated by the auxiliary power supply after the current suppressor R1 is complete, i.e. both the first EMI suppressing unit EMI1 and the second EMI suppressing unit EMI2 are used for common mode suppression.
Finally, as shown in fig. 3E, the normally open switch K1 is turned off, ready for the next input current suppression. The above is the preparation work before the starting of the main circuit of the later stage, and the starting of the circuit of the later stage can be controlled after the completion, or the next preparation work is carried out by resetting.
The utility model adds the normally closed switch K1, the rectifying diode D2, the filter capacitor C2 and the single-pole double-throw switch K2 on the conventional circuit, and the whole circuit is simple and reliable, can reliably start the auxiliary power supply, can inhibit the input current as required and can not influence the performance of the EMI. Through the starting current suppression technology, the auxiliary power supply and the main power supply can be reliably started according to the time sequence, and meanwhile, the normal operation of the EMI is not influenced. The utility model uses the conventional device, is favorable for enhancing the starting reliability under the condition of high input current inhibition requirement or high low-temperature starting requirement, ensures wider application range of products and enhances the competitiveness of the products.
While the utility model has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from its scope. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (8)
1. An input current suppressing start control circuit is characterized by comprising a main power supply device connected with a main power supply, an auxiliary power supply device connected with an auxiliary power supply, and a current suppressing switching module for switching between the main power supply device and the auxiliary power supply device and suppressing input current;
The current-suppressing switching module comprises a normally open switch, a current suppressor, a filter capacitor, a first rectifying diode, a second rectifying diode and a single-pole double-throw switch; the first end of the normally open switch is connected with the first end of the main power supply device, the movable contact of the single-pole double-throw switch and the second end of the normally open switch are connected with the second end of the main power supply device and the second fixed contact of the single-pole double-throw switch through the current suppressor, the first fixed contact of the single-pole double-throw switch is connected with the anode of the first rectifying diode, the cathode of the first rectifying diode is connected with the cathode of the second rectifying diode, the first end of the filter capacitor and the first end of the auxiliary power supply device, and the second end of the filter capacitor is grounded; and the anode of the second rectifying diode is connected with the third end of the main power supply device.
2. The input current suppressing start-up control circuit of claim 1, wherein the main power supply device comprises an EMI suppression module, a rectifying conversion module, and a first energy storage capacitor, a first end of the first energy storage capacitor being connected to a third end of the main power supply device, a second end being grounded, the EMI suppression module and the rectifying conversion module being connected in series between the main power supply and the first energy storage capacitor.
3. The input current suppressing start-up control circuit of claim 2, wherein the EMI suppression module comprises a first EMI suppression unit having a first end connected to a hot line of the main power supply, a second end connected to a neutral line of the main power supply, a third end connected to the rectifying and converting module, and a fourth end connected to a first end of the main power supply device.
4. The input current suppressing start-up control circuit of claim 2, wherein the EMI suppression module comprises a second EMI suppression unit having a first end connected to the second end of the main power supply device, a second end connected to a zero line of the main power supply, a third end, and a fourth end connected to the rectifier conversion module, respectively.
5. The input current suppressing start-up control circuit of claim 2, wherein the EMI suppressing module comprises a first EMI suppressing unit and a second EMI suppressing unit, a first end of the first EMI suppressing unit is connected to a live line of the main power supply, a second end is connected to a neutral line of the main power supply, a third end is connected to a second end of the second EMI suppressing unit, a fourth end is connected to a first end of the main power supply device, and a first end of the second EMI suppressing unit is connected to a second end, a third end, and a fourth end of the main power supply device are respectively connected to the rectification conversion module.
6. The input current suppressing start-up control circuit of any one of claims 1-5, further comprising a safety device connected between a hot of the main power supply and the main power supply device.
7. The input current suppressing start-up control circuit of any one of claims 1-5, wherein the auxiliary power supply device comprises an auxiliary power supply conversion module and a second energy storage capacitor, a first end of the second energy storage capacitor is connected to a positive electrode of the auxiliary power supply and a fourth end of the auxiliary power supply conversion module, a second end of the second energy storage capacitor is connected to a negative electrode of the auxiliary power supply and a third end of the auxiliary power supply conversion module, and a first end of the auxiliary power supply conversion module is connected to a first end and a second end of the auxiliary power supply device to ground.
8. An input current suppressing start control circuit is characterized by comprising a main power supply device connected with a main power supply, an auxiliary power supply device connected with an auxiliary power supply, and a current suppressing switching module for switching between the main power supply device and the auxiliary power supply device and suppressing input current;
The main power supply device comprises a first EMI suppression unit, a second EMI suppression unit, a rectification conversion module and a first energy storage capacitor; the auxiliary power supply device comprises an auxiliary power supply conversion module and a second energy storage capacitor; the current-suppressing switching module consists of a normally open switch, a current suppressor, a filter capacitor, a first rectifying diode, a second rectifying diode and a single-pole double-throw switch;
The first end of the first EMI suppression unit is connected with a live wire of the main power supply, the second end of the first EMI suppression unit is connected with a zero line of the main power supply, the third end of the first EMI suppression unit is connected with the second end of the second EMI suppression unit, the fourth end of the first EMI suppression unit is connected with the first end of the normally open switch and the moving contact of the single-pole double-throw switch, and the second end of the normally open switch is connected with the first end of the second EMI suppression unit and the second fixed contact of the single-pole double-throw switch through the current suppressor; the first stationary contact of the single-pole double-throw switch is connected with the anode of the first rectifying diode, the cathode of the first rectifying diode is connected with the cathode of the second rectifying diode, the first end of the filter capacitor and the first end of the auxiliary power conversion module, and the second end of the filter capacitor and the second end of the auxiliary power conversion module are grounded; the third end and the fourth end of the second EMI suppression unit are respectively connected with the second end and the first end of the rectification conversion module, and the third end and the fourth end of the rectification conversion module are respectively connected with the first energy storage capacitor; the fourth end of the rectifying conversion module is connected with the anode of the rectifying diode; the third end and the fourth end of the auxiliary power supply conversion module are respectively connected with the positive electrode and the negative electrode of the auxiliary power supply, and the second energy storage capacitor is also connected between the positive electrode and the negative electrode of the auxiliary power supply.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322528951.3U CN221103186U (en) | 2023-09-18 | 2023-09-18 | Input current suppressing start control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322528951.3U CN221103186U (en) | 2023-09-18 | 2023-09-18 | Input current suppressing start control circuit |
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| CN221103186U true CN221103186U (en) | 2024-06-07 |
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| CN202322528951.3U Active CN221103186U (en) | 2023-09-18 | 2023-09-18 | Input current suppressing start control circuit |
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