CN220438428U - Topology identification signal generation circuit - Google Patents
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- CN220438428U CN220438428U CN202322040608.4U CN202322040608U CN220438428U CN 220438428 U CN220438428 U CN 220438428U CN 202322040608 U CN202322040608 U CN 202322040608U CN 220438428 U CN220438428 U CN 220438428U
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Abstract
The utility model discloses a topology identification signal generating circuit, which comprises: the device comprises a power supply conversion module, a voltage stabilizing module, an isolation module and a topology identification signal generation module; the power conversion module is connected with the mains supply circuit and converts alternating current of the mains supply circuit into direct current; the voltage stabilizing module is connected with the power supply conversion module and used for stabilizing the direct current output by the power supply conversion module; the isolation module is connected with the frequency control signal and is connected with the voltage stabilizing module, the isolation module is turned on or off according to the frequency control signal, and a driving signal corresponding to the frequency control signal is output when the isolation module is turned on; the topology identification signal generation module is connected with the isolation module and the power conversion module, generates a characteristic current signal with the same frequency as the frequency control signal according to the driving signal output by the isolation module, and loads the characteristic current signal to the mains supply circuit through the power conversion module. The utility model realizes the output of the characteristic current signal consistent with the frequency of the frequency control signal.
Description
Technical Field
The utility model relates to the technical field of electronic circuits, in particular to a topology identification signal generation circuit.
Background
The topology identification technology is applied to a circuit system and plays an important role in the structure and the function of an analysis circuit, wherein a topology signal generation circuit can generate a specific topology identification signal for identification by a topology identification device.
At present, a topology signal generating circuit generally comprises a voltage stabilizer, the voltage stabilizer outputs a driving signal after stabilizing voltage according to a frequency control signal at an input end, the switching on and the switching off of a switch are controlled, and when the switch is switched on, the frequency of the frequency control signal is loaded to a mains supply circuit so as to be recognized by topology recognition equipment connected with the mains supply circuit. However, the voltage regulator cannot follow the frequency of the frequency control signal, resulting in that the frequency of the topology identification signal output by the topology signal generation circuit does not coincide with the frequency of the frequency control signal.
Disclosure of Invention
The utility model provides a topology identification signal generating circuit which is used for solving the problem that the frequency of a topology identification signal output by the topology signal generating circuit is inconsistent with the frequency of a frequency control signal in the prior art.
According to an aspect of the present utility model, there is provided a topology identification signal generation circuit including: the device comprises a power supply conversion module, a voltage stabilizing module, an isolation module and a topology identification signal generation module;
the input end of the power supply conversion module is connected with a mains supply circuit, and the power supply conversion module is used for converting the alternating current of the accessed mains supply circuit into direct current;
the input end of the voltage stabilizing module is connected with the output end of the power conversion module, and the voltage stabilizing module is used for stabilizing the direct current output by the power conversion module;
the input end of the isolation module is used for accessing a frequency control signal, the isolation module is connected with the output end of the voltage stabilizing module, the isolation module is used for being switched on or off according to the frequency control signal, and when the isolation module is switched on, a driving signal corresponding to the frequency control signal is output through the output end;
the control end of the topology identification signal generation module is connected with the output end of the isolation module, the output end of the topology identification signal generation module is connected with the power conversion module, and the topology identification signal generation module is used for generating a characteristic current signal with the same frequency as the frequency control signal according to the driving signal output by the isolation module and loading the characteristic current signal to the mains supply circuit through the power conversion module.
Optionally, the topology identification signal generating module includes a switch control unit and a switch unit, wherein an input end of the switch control unit is connected with a control end of the topology identification signal generating module, and the switch control unit is used for conducting when the isolation module is conducted and outputting a switch conducting signal through an output end after conducting; the input end of the switch unit is connected with the output end of the switch control unit, the output end of the switch unit is connected with the output end of the topology identification signal generation module, and the switch unit is used for conducting according to the switch conducting signal and outputting the characteristic current signal after conducting.
Optionally, the switch control unit includes a first transistor, a first resistor and a second resistor, a control end of the first transistor is connected with a first end of the first resistor and a first end of the second resistor, a second end of the first resistor is connected with an input end of the switch control unit, a second end of the second resistor is grounded, a first end of the first transistor is connected with an output end of the switch control unit, and a second end of the first transistor is grounded.
Optionally, the switch unit includes a second transistor and a third resistor, a control end of the second transistor is connected to an input end of the switch unit, a first end of the second transistor is connected to an output end of the switch unit, a second end of the second transistor is connected to a first end of the third resistor, and a second end of the third resistor is grounded.
Optionally, the isolation module includes an optocoupler and a fourth resistor, a first end of a diode of the optocoupler is connected to a first end of the fourth resistor, a second end of a diode of the optocoupler is grounded, a second end of the fourth resistor is connected to an input end of the isolation module, a first end of a triode of the optocoupler is connected to the voltage stabilizing module, and a second end of a triode of the optocoupler is connected to an output end of the isolation module.
Optionally, the utility power circuit includes live wire and zero line, the power conversion module includes the rectifier, the first end of rectifier is connected the live wire, the second end of rectifier is connected the zero line, the third end of rectifier is connected the output of power conversion module, the fourth ground connection of rectifier.
Optionally, the voltage stabilizing module includes a first diode, a first voltage stabilizing tube and a first capacitor, a first end of the first diode is connected with an input end of the voltage stabilizing module and a first end of the first voltage stabilizing tube, a second end of the first voltage stabilizing tube is grounded, a second end of the first diode is connected with an output end of the voltage stabilizing module and a first end of the first capacitor, and a second end of the first capacitor is grounded.
Optionally, the topology identification signal generating circuit further includes a voltage dividing module, the voltage dividing module includes at least one fifth resistor, an input end of the voltage dividing module is connected to an output end of the power conversion module, an output end of the voltage dividing module is connected to an input end of the voltage stabilizing module, and the voltage dividing module is used for dividing an electric signal output by the power conversion module.
Optionally, the topology identification signal generating circuit further includes a protection module, the protection module is connected to the power conversion module and the topology identification signal generating module, and the protection module is used for protecting the topology identification signal generating circuit.
Optionally, the protection module includes a sixth resistor, a seventh resistor and a second capacitor, where a first end of the sixth resistor is connected to the output end of the power conversion module, a second end of the sixth resistor is connected to the first end of the seventh resistor and the first end of the second capacitor, a second end of the seventh resistor is connected to the output end of the topology identification signal generating module, and a second end of the second capacitor is grounded.
The technical scheme of the embodiment of the utility model provides a topology identification signal generation circuit, which comprises the following components: the device comprises a power supply conversion module, a voltage stabilizing module, an isolation module and a topology identification signal generation module; the power conversion module is connected with the mains supply circuit and converts alternating current of the mains supply circuit into direct current; the voltage stabilizing module is connected with the power supply conversion module and used for stabilizing the direct current output by the power supply conversion module; the isolation module is connected with the frequency control signal and is connected with the voltage stabilizing module, the isolation module is turned on or off according to the frequency control signal, and a driving signal corresponding to the frequency control signal is output when the isolation module is turned on; the topology identification signal generation module is connected with the isolation module and the power conversion module, generates a characteristic current signal with the same frequency as the frequency control signal according to the driving signal output by the isolation module, and loads the characteristic current signal to the mains supply circuit through the power conversion module. The isolation module is turned on or off according to the frequency control signal, and outputs a driving signal corresponding to the frequency control signal when being turned on, and the topology identification signal generation module outputs a characteristic current signal with the same frequency as the frequency control signal according to the driving signal, wherein the characteristic current signal is used as the topology identification signal and is consistent with the frequency of the frequency control signal, and the problem that the frequency of the topology identification signal output by the topology signal generation circuit is inconsistent with the frequency of the frequency control signal in the prior art is solved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a circuit diagram of a topology identification signal generation circuit provided by the related art;
fig. 2 is a schematic structural diagram of a topology identification signal generating circuit according to an embodiment of the present utility model;
FIG. 3 is a circuit diagram of a topology identification signal generation circuit provided by an embodiment of the present utility model;
fig. 4 is a circuit diagram of another topology identification signal generation circuit according to an embodiment of the present utility model.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The topology signal generation circuit may generate a specific topology identification signal for identification by the topology identification device. Fig. 1 is a circuit diagram of a topology identification signal generating circuit provided in the related art, as shown in fig. 1, the topology signal generating circuit includes a voltage stabilizer U0, a rectifier D0, a first interface H1, a second interface H2, a transistor Q0, a resistor R, a capacitor C, a diode D and a triode T, the voltage stabilizer U0 outputs a driving signal after stabilizing the voltage according to an input frequency control signal, controls the on and off of the transistor Q0, and loads the frequency of the frequency control signal to a mains circuit through the rectifier D0 when the transistor Q0 is on for identification of the topology identification device connected with the mains circuit, wherein the mains circuit includes a live wire L and a zero wire N. However, the voltage regulator U0 cannot follow the frequency of the frequency control signal, resulting in that the frequency of the topology identification signal output by the topology signal generation circuit does not coincide with the frequency of the frequency control signal.
In order to solve the above-mentioned problems, an embodiment of the present utility model provides a topology identification signal generating circuit, and fig. 2 is a schematic structural diagram of the topology identification signal generating circuit provided in the embodiment of the present utility model, as shown in fig. 2, the topology identification signal generating circuit includes: a power conversion module 110, a voltage stabilizing module 120, an isolation module 130, and a topology identification signal generation module 140; the input end a1 of the power conversion module 110 is connected with a mains supply circuit, and the power conversion module 110 is used for converting alternating current of the accessed mains supply circuit into direct current; the input end a2 of the voltage stabilizing module 120 is connected with the output end b1 of the power conversion module 110, and the voltage stabilizing module 120 is used for stabilizing the direct current output by the power conversion module 110; the input end a3 of the isolation module 130 is used for accessing a frequency control signal, the isolation module 130 is connected with the output end b2 of the voltage stabilizing module 120, the isolation module 130 is used for being turned on or off according to the frequency control signal, and when the isolation module 130 is turned on, a driving signal corresponding to the frequency control signal is output through the output end b 3; the control end a4 of the topology identification signal generating module 140 is connected to the output end b3 of the isolation module 130, the output end b4 of the topology identification signal generating module 140 is connected to the power conversion module 110, and the topology identification signal generating module 140 is configured to generate a characteristic current signal with the same frequency as the frequency control signal according to the driving signal output by the isolation module 130, and load the characteristic current signal to the mains supply circuit through the power conversion module 110.
In this embodiment, the power conversion module 110 is a module that can convert one type of power source into another type of power source, for example, the power conversion module 110 can convert alternating current into direct current. The voltage stabilizing module 120 has the function of stabilizing voltage, and can make the voltage stable at a fixed value. The isolation module 130 is a module with functions of signal transmission, anti-interference, and the like, for example, the isolation module 130 includes an optical coupler, and the optical coupler performs signal transmission through photoelectric signal conversion and has the advantage of quick response. The topology identification signal generation module 140 is a module that generates a topology identification signal. The frequency control signal is an electrical signal of a preset frequency and can be output by the controller. The driving signal is a signal generated according to the voltage output by the voltage stabilizing module 120 and the frequency control signal, for example, the voltage value of the driving signal is the same as the voltage value output by the voltage stabilizing module 120, and the frequency value of the driving signal is the same as the frequency value of the frequency control signal. The characteristic current signal is a signal having the same frequency as the frequency control signal as the topology identification signal.
In this embodiment, the isolation module 130 is turned on or off according to the frequency control signal, and the frequency control signal includes a level signal, when the frequency control signal is a high level signal, the isolation module 130 is turned on, the isolation module 130 outputs a driving signal according to the voltage signal and the frequency control signal output by the voltage stabilizing module 120, the topology identification signal generating module 140 outputs a characteristic current signal according to the driving signal, the characteristic current signal output by the topology identification signal generating module 140 is loaded to the mains circuit through the power conversion module 110, and the characteristic current signal is used as a topology identification signal for being identified by an external topology identification signal circuit; when the frequency control signal is a low level signal, the isolation module 130 is turned off, the isolation module 130 no longer outputs a driving signal, the topology identification signal generation module 140 no longer outputs a characteristic current signal, and no more characteristic current signals are loaded to the mains supply circuit.
The technical scheme of the embodiment provides a topology identification signal generating circuit, which comprises: a power conversion module 110, a voltage stabilizing module 120, an isolation module 130, and a topology identification signal generation module 140; the power conversion module 110 is connected with a mains supply circuit, and the power conversion module 110 converts alternating current of the mains supply circuit into direct current; the voltage stabilizing module 120 is connected with the power supply conversion module 110, and the voltage stabilizing module 120 is used for stabilizing the direct current output by the power supply conversion module 110; the isolation module 130 is connected with the frequency control signal and is connected with the voltage stabilizing module 120, the isolation module 130 is turned on or off according to the frequency control signal, and a driving signal corresponding to the frequency control signal is output when the isolation module 130 is turned on; the topology identification signal generating module 140 is connected to the isolation module 130 and the power conversion module 110, and the topology identification signal generating module 140 generates a characteristic current signal with the same frequency as the frequency control signal according to the driving signal output by the isolation module 130 and loads the characteristic current signal to the mains supply circuit through the power conversion module 110. The isolation module 130 provided in this embodiment is turned on or off according to the frequency control signal, and outputs a driving signal corresponding to the frequency control signal when turned on, and the topology identification signal generation module 140 outputs a characteristic current signal with the same frequency as the frequency control signal according to the driving signal, where the characteristic current signal is used as the topology identification signal and is consistent with the frequency of the frequency control signal, so as to solve the problem that the frequency of the topology identification signal output by the topology signal generation circuit is inconsistent with the frequency of the frequency control signal in the prior art.
Fig. 3 is a circuit diagram of a topology identification signal generating circuit according to an embodiment of the present utility model, as shown in fig. 3, a topology identification signal generating module 140 includes a switch control unit and a switch unit, an input end of the switch control unit is connected to a control end a4 of the topology identification signal generating module 140, and the switch control unit is used for conducting when the isolation module is conducted, and outputting a switch conducting signal through an output end after conducting; the input end of the switch unit is connected with the output end of the switch control unit, the output end of the switch unit is connected with the output end b4 of the topology identification signal generation module 140, and the switch unit is used for conducting according to the switch conducting signal and outputting a characteristic current signal after conducting.
In this embodiment, the switch control unit may control the switch unit to be turned on or off, and the switch unit includes a switching device and the like. The switch control unit is turned on according to the driving signal output by the isolation module 130 and outputs a switch turn-on signal, and the switch unit is turned on according to the switch turn-on signal and outputs a characteristic current signal, and the characteristic current signal is loaded to the mains supply circuit through the power conversion module 110. The switch control unit is connected between the isolation module 130 and the switch unit, so that the switch unit is prevented from being damaged when the isolation module 130 outputs a larger driving signal, and the switch unit is buffered and protected.
Specifically, the switch control unit includes a first transistor Q1, a first resistor R1 and a second resistor R2, where a control end of the first transistor Q1 is connected to a first end of the first resistor R1 and a first end of the second resistor R2, a second end of the first resistor R1 is connected to an input end of the switch control unit, a second end of the second resistor R2 is grounded, a first end of the first transistor Q1 is connected to an output end of the switch control unit, and a second end of the first transistor Q1 is grounded. The switch unit comprises a second transistor Q2 and a third resistor R3, the control end of the second transistor Q2 is connected with the input end of the switch unit, the first end of the second transistor Q2 is connected with the output end of the switch unit, the second end of the second transistor Q2 is connected with the first end of the third resistor R3, and the second end of the third resistor R3 is grounded.
In this embodiment, when the isolation module 130 outputs the driving signal, the driving signal is divided by the first resistor R1 and the second resistor R2 and then transmitted to the control end of the first transistor Q1, so that the voltage of the control end of the first transistor Q1 is lower, the first transistor Q1 is turned on and outputs a switch on signal, the second transistor Q2 is turned on according to the switch on signal and outputs a characteristic current signal, and the characteristic current signal is loaded to the mains circuit through the power conversion module 110. The topology identification signal generating module 140 further includes an eighth resistor R8, where the eighth resistor R8 is a current limiting resistor, so that the current at the control end of the second transistor Q2 in the switching unit is smaller, and the second transistor Q2 is protected.
With continued reference to fig. 3, the utility power circuit includes a live wire L and a neutral wire N, the power conversion module 110 includes a rectifier U2, a first end of the rectifier U2 is connected to the live wire L, a second end of the rectifier U2 is connected to the neutral wire N, a third end of the rectifier U2 is connected to an output end b1 of the power conversion module 110, and a fourth end of the rectifier U2 is grounded.
In this embodiment, the electrical signal in the utility circuit is generally 220V ac, where the live line L refers to a power line in the utility circuit, the ground voltage of the live line L is 220V, and the ground voltage of the zero line N is zero. The rectifier U2 is connected with a mains supply circuit, so that 220V alternating current in the mains supply circuit can be converted into direct current.
With continued reference to fig. 3, the topology identification signal generating circuit further includes a voltage dividing module 210, where the voltage dividing module 210 includes at least one fifth resistor R5, an input end of the voltage dividing module 210 is connected to an output end b1 of the power conversion module 110, an output end of the voltage dividing module 210 is connected to an input end a2 of the voltage stabilizing module 120, and the voltage dividing module 210 is configured to divide the voltage of the electric signal output by the power conversion module 110.
In this embodiment, since the voltage of the dc power output from the ac power supply circuit after being rectified by the rectifier U2 is relatively high, a plurality of resistors with the same resistance value may be used to divide the voltage in series, so that the resistance value of each resistor is relatively small, and the overcurrent capability on the whole line may be increased. The voltage dividing module 210 includes three fifth resistors R5, and the three fifth resistors R5 are connected in series, and the dc voltage output by the voltage dividing module 120 is 12V.
With continued reference to fig. 3, the voltage stabilizing module 120 includes a first diode D1, a first voltage stabilizing tube D2 and a first capacitor C1, where a first end of the first diode D1 is connected to the input terminal a2 of the voltage stabilizing module 120 and a first end of the first voltage stabilizing tube D2, a second end of the first voltage stabilizing tube D2 is grounded, a second end of the first diode D1 is connected to the output terminal b2 of the voltage stabilizing module 120 and a first end of the first capacitor C1, and a second end of the first capacitor C1 is grounded. The first diode D2 may enable the voltage of the input terminal a2 connected to the voltage stabilizing module 120 to be kept at 12V, the first diode D1 is a freewheeling diode, and when the voltage of the output terminal b2 of the voltage stabilizing module 120 is lower than 12V, the first diode D1 discharges the first capacitor C1 through freewheeling to compensate the voltage of the output terminal b2 of the voltage stabilizing module 120, so as to ensure that the voltage of the output terminal b2 of the voltage stabilizing module 120 is kept at 12V. The smaller the capacitance value of the first capacitor C1, the higher the resonance frequency, and the larger the frequency range of the first capacitor C1 capable of effectively compensating the current.
With continued reference to fig. 3, the isolation module includes an optocoupler U1 and a fourth resistor R4, a first end of a diode of the optocoupler U1 is connected to a first end of the fourth resistor R4, a second end of the diode of the optocoupler U1 is grounded, a second end of the fourth resistor R4 is connected to an input end a3 of the isolation module 130, a first end of a triode of the optocoupler U1 is connected to the voltage stabilizing module 120, and a second end of a triode of the optocoupler U1 is connected to an output end b3 of the isolation module 130.
The input terminal a3 of the isolation module 130 is connected to a controller, and a frequency control signal output by the controller is transmitted to the optocoupler U1 through the fourth resistor R4. When the frequency control signal is a high level signal, the optocoupler U1 is turned on, and the optocoupler U1 outputs a driving signal according to the 12V voltage signal and the frequency control signal output by the voltage stabilizing module 120, where the voltage value of the driving signal is 12V, and the frequency value is the same as the frequency value of the frequency control signal. The driving signal is transmitted to the control end of the first transistor Q1 after being divided by the first resistor R1 and the second resistor R2, for example, the current of the control end of the first transistor Q1 is 1mA, the current of the control end of the first transistor Q1 is amplified by the first transistor Q1 and then a switch conduction signal is output, the second transistor Q2 is conducted according to the received switch conduction signal, the second transistor Q2 is conducted and then a characteristic current signal is output, and the characteristic current signal is loaded to a mains supply circuit through the rectifier U2 so as to be identified by an external topology identification signal circuit. When the frequency control signal is a low-level signal, the optocoupler U1 is turned off, the optocoupler U1 does not output a driving signal any more, the second transistor Q2 does not output a characteristic current signal any more, and no more characteristic current signals are loaded to the mains supply circuit.
The optical coupler U1 is set to be turned on or turned off according to the frequency control signal, and because the optical coupler performs signal transmission through photoelectric signal conversion, the optical coupler has the characteristic of quick response, when in conduction, a driving signal with the same frequency as the frequency control signal is output, and the topology identification signal generation module outputs a characteristic current signal with the same frequency as the driving signal according to the driving signal, namely, the characteristic current signal is used as the topology identification signal, the frequency of the characteristic current signal is the same as the frequency of the frequency control signal, the accuracy of the topology identification signal output by the topology signal generation circuit is improved, and the topology identification signal is conveniently identified by the topology signal identification circuit.
Fig. 4 is a circuit diagram of another topology identification signal generating circuit according to an embodiment of the present utility model, and as shown in fig. 4, the topology identification signal generating circuit further includes a protection module 310, where the protection module 310 is connected to the power conversion module 110 and the topology identification signal generating module 140, and the protection module 310 is configured to protect the topology identification signal generating circuit. For example, when a topology identification signal generating circuit generates a surge due to poor line contact, trouble shooting, electrostatic discharge, etc., data loss, equipment damage, etc. may be caused, and thus, protection measures are to be taken.
Specifically, the protection module 310 includes a sixth resistor R6, a seventh resistor R7, and a second capacitor C2, where a first end of the sixth resistor R6 is connected to the output end b1 of the power conversion module 110, a second end of the sixth resistor R6 is connected to a first end of the seventh resistor R7 and a first end of the second capacitor C2, a second end of the seventh resistor R7 is connected to the output end b4 of the topology identification signal generation module 140, and a second end of the second capacitor C2 is grounded.
In this embodiment, the sixth resistor R6 and the seventh resistor R7 are current limiting resistors, and have voltage dividing function, the second capacitor C2 is a safety capacitor, and the safety capacitor is a capacitor meeting the requirements of safety regulations, and is mainly used for protection of abnormal conditions such as overvoltage and overcurrent of a circuit, electromagnetic interference filtering, and the like, and the second capacitor C2 shares surge voltage with the sixth resistor R6 and the seventh resistor R7. For example, there may be a surge voltage generated by lightning strike on the utility power circuit wire, and the second capacitor C2 can eliminate the high-frequency surge voltage, so as to prevent the topology identification signal generating circuit from being damaged.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present utility model may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present utility model are achieved, and the present utility model is not limited herein.
The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. A topology identification signal generation circuit, comprising: the device comprises a power supply conversion module, a voltage stabilizing module, an isolation module and a topology identification signal generation module;
the input end of the power supply conversion module is connected with a mains supply circuit, and the power supply conversion module is used for converting the alternating current of the accessed mains supply circuit into direct current;
the input end of the voltage stabilizing module is connected with the output end of the power conversion module, and the voltage stabilizing module is used for stabilizing the direct current output by the power conversion module;
the input end of the isolation module is used for accessing a frequency control signal, the isolation module is connected with the output end of the voltage stabilizing module, the isolation module is used for being switched on or off according to the frequency control signal, and when the isolation module is switched on, a driving signal corresponding to the frequency control signal is output through the output end;
the control end of the topology identification signal generation module is connected with the output end of the isolation module, the output end of the topology identification signal generation module is connected with the power conversion module, and the topology identification signal generation module is used for generating a characteristic current signal with the same frequency as the frequency control signal according to the driving signal output by the isolation module and loading the characteristic current signal to the mains supply circuit through the power conversion module.
2. The topology identification signal generation circuit of claim 1, wherein the topology identification signal generation module comprises a switch control unit and a switch unit, an input end of the switch control unit is connected with a control end of the topology identification signal generation module, and the switch control unit is used for conducting when the isolation module is conducted and outputting a switch conducting signal through an output end after conducting; the input end of the switch unit is connected with the output end of the switch control unit, the output end of the switch unit is connected with the output end of the topology identification signal generation module, and the switch unit is used for conducting according to the switch conducting signal and outputting the characteristic current signal after conducting.
3. The topology identification signal generation circuit of claim 2, wherein the switch control unit comprises a first transistor, a first resistor, and a second resistor, a control terminal of the first transistor is connected to a first terminal of the first resistor and a first terminal of the second resistor, a second terminal of the first resistor is connected to an input terminal of the switch control unit, a second terminal of the second resistor is grounded, a first terminal of the first transistor is connected to an output terminal of the switch control unit, and a second terminal of the first transistor is grounded.
4. The topology identification signal generation circuit of claim 2, wherein the switching unit comprises a second transistor and a third resistor, a control terminal of the second transistor is connected to an input terminal of the switching unit, a first terminal of the second transistor is connected to an output terminal of the switching unit, a second terminal of the second transistor is connected to a first terminal of the third resistor, and a second terminal of the third resistor is grounded.
5. The topology identification signal generation circuit of claim 1, wherein the isolation module comprises an optocoupler and a fourth resistor, a first end of a diode of the optocoupler is connected to the first end of the fourth resistor, a second end of the diode of the optocoupler is grounded, a second end of the fourth resistor is connected to the input end of the isolation module, a first end of a triode of the optocoupler is connected to the voltage stabilizing module, and a second end of a triode of the optocoupler is connected to the output end of the isolation module.
6. The topology identification signal generation circuit of claim 1, wherein the utility circuit comprises a hot wire and a neutral wire, the power conversion module comprises a rectifier, a first end of the rectifier is connected to the hot wire, a second end of the rectifier is connected to the neutral wire, a third end of the rectifier is connected to an output end of the power conversion module, and a fourth end of the rectifier is grounded.
7. The topology identification signal generation circuit of claim 1, wherein the voltage regulator module comprises a first diode, a first voltage regulator tube, and a first capacitor, a first end of the first diode is connected to the input terminal of the voltage regulator module and the first end of the first voltage regulator tube, a second end of the first voltage regulator tube is grounded, a second end of the first diode is connected to the output terminal of the voltage regulator module and the first end of the first capacitor, and a second end of the first capacitor is grounded.
8. The topology identification signal generation circuit of any one of claims 1 to 7, further comprising a voltage division module, wherein the voltage division module comprises at least one fifth resistor, an input end of the voltage division module is connected to an output end of the power conversion module, an output end of the voltage division module is connected to an input end of the voltage stabilization module, and the voltage division module is configured to divide the electrical signal output by the power conversion module.
9. The topology identification signal generation circuit of any one of claims 1 to 7, further comprising a protection module connecting the power conversion module and the topology identification signal generation module, the protection module for protecting the topology identification signal generation circuit.
10. The topology identification signal generation circuit of claim 9, wherein the protection module comprises a sixth resistor, a seventh resistor, and a second capacitor, a first end of the sixth resistor being connected to the output of the power conversion module, a second end of the sixth resistor being connected to the first end of the seventh resistor and the first end of the second capacitor, a second end of the seventh resistor being connected to the output of the topology identification signal generation module, and a second end of the second capacitor being grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202322040608.4U CN220438428U (en) | 2023-07-31 | 2023-07-31 | Topology identification signal generation circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322040608.4U CN220438428U (en) | 2023-07-31 | 2023-07-31 | Topology identification signal generation circuit |
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| CN220438428U true CN220438428U (en) | 2024-02-02 |
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| CN202322040608.4U Active CN220438428U (en) | 2023-07-31 | 2023-07-31 | Topology identification signal generation circuit |
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