CN114423113A - Alternating current switching and emergency lamp working mode control circuit - Google Patents
Alternating current switching and emergency lamp working mode control circuit Download PDFInfo
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- CN114423113A CN114423113A CN202111595486.4A CN202111595486A CN114423113A CN 114423113 A CN114423113 A CN 114423113A CN 202111595486 A CN202111595486 A CN 202111595486A CN 114423113 A CN114423113 A CN 114423113A
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- voltage
- windmill
- dividing resistor
- control circuit
- emergency lamp
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/02—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which an auxiliary distribution system and its associated lamps are brought into service
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/345—Current stabilisation; Maintaining constant current
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
- H05B45/3725—Switched mode power supply [SMPS]
Abstract
The application relates to an alternating current switching and emergency lamp working mode control circuit. The circuit includes: the device comprises a comparator control circuit, a power supply selection circuit and an LED emergency lamp control circuit; the comparator control circuit acquires comparator control voltage according to the windmill voltage and the mains supply voltage, and the power supply selection circuit controls the on-off of the relay according to the comparator control voltage and switches the power supply mode; the LED emergency lamp control circuit controls the state of the LED emergency lamp according to the comparator control voltage. The circuit can automatically detect two paths of alternating current input, select three working modes of the emergency lamp according to the state of the alternating current input, and can also automatically switch in the working process. The windmill power supply mode is a normal working mode, and at the moment, only the backup battery is charged, and the LED lamp is not lighted to prolong the service life of the LED lamp bead. And in the mains supply mode, the backup battery is periodically charged when the windmill power supply is not installed to ensure the activity of the battery and check whether the LED lamp is normal or not.
Description
Technical Field
The application relates to the field of automatic circuit switching, in particular to an alternating current switching and emergency lamp working mode control circuit.
Background
The LED emergency lamp is widely applied to the fields of traffic, medical treatment, home furnishing and industrial control, and some LED emergency lamp systems can only supply power through commercial power and cannot switch power supply lines under different scenes. Other LED emergency light systems may be powered by mains electricity and other power sources, but require manual switching of the power supply lines. When the LED emergency lamp system is powered by the windmill electricity, the windmill electricity generally works 24 hours a day, and if the LED emergency lamp is kept in a flashing state at the moment, the service life of the LED emergency lamp is shortened. The LED emergency lamp may be damaged in the using process, and whether the LED emergency lamp can be normally used needs to be periodically detected.
The LED emergency lamp system needs to prolong the service life of the LED emergency lamp and detect whether the LED emergency lamp can work normally.
Disclosure of Invention
In order to overcome the problems in the related art, the application provides an alternating current switching and emergency lamp working mode control circuit. When the circuit is in a windmill power supply mode, the LED emergency lamp is controlled not to be turned on, so that the service life of the LED emergency lamp can be prolonged; when the circuit is in a mains supply mode or an emergency backup battery mode, the LED emergency lamp is controlled to be on, and whether the LED emergency lamp can work normally or not can be detected.
The application provides an alternating current switches and emergency light mode control circuit, includes:
the device comprises a comparator control circuit, a power supply selection circuit and an LED emergency lamp control circuit;
the comparator control circuit includes: a first operational amplifier (2U2A), a second operational amplifier (2U2B), a third operational amplifier (2U2C), a windmill power first voltage-dividing resistor (2R8), a windmill power second voltage-dividing resistor (2R9), a commercial power first voltage-dividing resistor (2R15) and a commercial power second voltage-dividing resistor (2R14), a windmill power rectifier diode (2D5), a commercial power rectifier diode (2D4), a windmill power current-limiting diode (2D6) and a windmill power current-limiting resistor (2R 12);
the windmill electric connection terminal (L2) is grounded through the windmill electric rectifier diode (2D5), the windmill electric first voltage-dividing resistor (2R8) and the windmill electric second voltage-dividing resistor (2R9) in sequence; the same-direction input end of the first operational amplifier (2U2A) is electrically connected with the windmill electricity first voltage-dividing resistor (2R8) and the windmill electricity second voltage-dividing resistor (2R 9); the first operational amplifier (2U2A) is electrically connected with the output end of the second operational amplifier (2U2B) through the windmill current limiting diode (2D6) and the windmill current limiting resistor (2R12) in sequence;
the mains supply access end (L1) is grounded through the mains supply rectifying diode (2D4), the mains supply first voltage-dividing resistor (2R15) and the mains supply second voltage-dividing resistor (2R14) in sequence; the inverting input end of the second operational amplifier (2U2B) is electrically connected with the mains supply first voltage-dividing resistor (2R15) and the mains supply second voltage-dividing resistor (2R 14); the comparator control circuit obtains comparator control voltage according to the windmill voltage and the mains supply voltage, and provides the comparator control voltage for the power supply selection circuit;
and the power supply selection circuit controls the on-off of the relay according to the comparator control voltage, and switches the power supply mode.
And the LED emergency lamp control circuit controls the state of the LED emergency lamp according to the comparator control voltage.
The power supply selection circuit includes:
the system comprises a windmill electric control relay (2DJ2), a commercial power control relay (2DJ1), a first drain resistor (2R2), a second drain resistor (2R3), a first switching tube (2Q1), a second switching tube (2Q2) and a third switching tube (2Q 3);
the grid electrode of the first switch tube (2Q1) is electrically connected with the grid electrode of the second switch tube (2Q2), the source electrode of the first switch tube (2Q1) is electrically connected with the source electrode of the second switch tube (2Q2), and the source electrode of the first switch tube (2Q1) is electrically connected with the source electrode of the third switch tube (2Q 3).
According to the switching-off of the comparator control voltage control relay, the power supply mode of the LED emergency lamp alternating current switching circuit is switched, and the switching-off power supply mode comprises the following steps:
when the comparator control voltage is at a high level, the first switch tube (2Q1) and the second switch tube (2Q2) are connected, the third switch tube (2Q3) is cut off, so that the commercial power controller (2DJ1) is disconnected, the windmill electric controller (2DJ2) is attracted and switched to a windmill electric power supply mode, and an emergency backup battery is charged;
when the comparator control voltage is in a low level, the first switch tube (2Q1) and the second switch tube (2Q2) are cut off, the third switch tube (2Q3) is conducted, so that the commercial power controller (2DJ1) is attracted, the windmill electric controller (2DJ2) is disconnected, a commercial power supply mode is switched to, and the emergency backup battery is charged;
when the comparator control voltage is 0, the windmill electric controller (2DJ2) and the commercial power controller (2DJ1) are both disconnected, and the emergency backup battery mode is switched.
The comparator control voltage is determined by the windmill voltage and the mains voltage:
when the commercial power voltage is higher than the commercial power reference voltage and the windmill voltage is lower than the windmill voltage reference voltage, the comparator controls the voltage to be at a low level;
when the mains supply voltage is higher than the mains supply reference voltage and the windmill voltage is higher than the windmill voltage reference voltage, the comparator controls the voltage to be at a low level;
when the mains supply voltage is lower than the mains supply reference voltage and the windmill voltage is higher than the windmill voltage reference voltage, the comparator controls the voltage to be at a high level;
and when the mains supply voltage is lower than the mains supply reference voltage and the windmill voltage is lower than the windmill voltage reference voltage, the comparator controls the voltage to be 0.
Further, the comparator control circuit further includes:
a first voltage dividing resistor (2R11), a second voltage dividing resistor (2R10), a third voltage dividing resistor (2R17) and a fourth voltage dividing resistor (2R 16);
the low-voltage input end is grounded through the first voltage-dividing resistor (2R11) and the second voltage-dividing resistor (2R10) in sequence, and the low-voltage input end is grounded through the third voltage-dividing resistor (2R17) and the fourth voltage-dividing resistor (2R16) in sequence;
the inverting input end of the first operational amplifier (2U2A) is electrically connected with the first voltage-dividing resistor (2R11) and the second voltage-dividing resistor (2R10), and the non-inverting input end of the second operational amplifier (2U2B) is electrically connected with the third voltage-dividing resistor (2R17) and the fourth voltage-dividing resistor (2R 16); the divided voltage of the second voltage dividing resistor (2R10) is supplied to an inverting input terminal of the first operational amplifier (2U2A), and the divided voltage of the fourth voltage dividing resistor (2R16) is supplied to a non-inverting input terminal of the second operational amplifier (2U 2B).
Further, the comparator control circuit further includes:
a windmill electric filter capacitor (2C3) and a mains supply filter capacitor (2C 5);
the windmill electric access terminal (L2) is grounded through the windmill electric rectifier diode (2D5) and the windmill electric filter capacitor (2C3) in sequence, and the voltage peak value of the windmill electric is obtained through half-wave rectification filtering;
the mains supply access end (L1) is grounded through the mains supply rectifying diode (2D4) and the mains supply filter capacitor (2C5) in sequence, and a mains supply voltage peak value is obtained through half-wave rectifying and filtering.
The windmill current limiting diode (2D6) and the windmill current limiting resistor (2R12) adjust the output end level of the first operational amplifier (2U 2A).
LED emergency light control circuit includes:
the LED emergency lamp comprises a light emitting diode (2D7), a phototriode (2Q4), an LED emergency lamp control circuit resistor (2R13), a constant-current control module (U3) and an LED emergency lamp;
the anode of the light emitting diode (2D7) is electrically connected with the output end of the second operational amplifier (2U2B) through the LED emergency lamp control circuit resistor (2R 13); the collector electrode of the phototriode (2Q4) is electrically connected with the LED emergency lamp through the constant current control module (U3).
The state of controlling the LED emergency lamp according to the comparator control voltage comprises the following steps:
when the comparator control voltage is at a high level, the light emitting diode (2D7) is conducted, so that the phototriode (2Q4) is conducted, the constant current control module (U3) has no constant current output, and the LED emergency lamp is not lighted;
when the comparator control voltage is at a low level, the light emitting diode (2D7) is cut off, so that the phototriode (2Q4) is cut off, the constant current control module (U3) has a constant current output, and the LED emergency lamp is on;
when the comparator control voltage is 0, an emergency backup battery is used for supplying power, the light emitting diode (2D7) is cut off, so that the phototriode (2Q4) is cut off, the constant current control module (U3) has constant current output, and the LED emergency lamp is turned on.
The technical scheme provided by the application can comprise the following beneficial effects:
the application provides an alternating current switches and emergency light mode control circuit, including comparator control circuit, power selection circuit and LED emergency light control circuit. The windmill electric connection end is grounded through a windmill electric rectifier diode, a windmill electric first voltage-dividing resistor and a windmill electric second voltage-dividing resistor in sequence; the same-direction input end of the first operational amplifier is electrically connected with a second voltage-dividing resistor of the windmill electricity to obtain the windmill electricity voltage division. The commercial power access end is grounded through a commercial power rectifying diode, a commercial power first voltage dividing resistor and a commercial power second voltage dividing resistor in sequence; the reverse input end of the second operational amplifier is electrically connected with a second voltage division resistor of the commercial power to obtain the commercial power voltage division. The output end of the first operational amplifier is electrically connected with the output end of the second operational amplifier through the windmill current limiting diode and the windmill current limiting resistor in sequence, and the two output ends jointly determine the control voltage of the comparator.
The control voltage of the comparator control circuit is input to the power supply selection circuit, and the automatic switching among the three working modes of the commercial power supply mode, the windmill power supply mode and the emergency backup battery mode is realized by controlling the on-off of the relay. The windmill electricity is long in electricity supply time, the LED emergency lamp is controlled not to be on under the condition of windmill electricity supply, and the service life of the LED emergency lamp can be prolonged. The LED emergency lamp is controlled to be on under the condition that no windmill power supply exists, so that whether the LED emergency lamp can work normally or not is detected.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
FIG. 1 is a schematic diagram of a comparator control circuit according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a power selection circuit according to an embodiment of the present application;
fig. 3 is a schematic diagram of an LED emergency lamp control circuit according to an embodiment of the present application.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
When the LED emergency lamp system is powered by the windmill electricity, the windmill electricity generally works 24 hours a day, and if the LED emergency lamp is kept in a flashing state at the moment, the service life of the LED emergency lamp is shortened. The LED emergency lamp may be damaged in the using process, and whether the LED emergency lamp can be normally used needs to be periodically detected.
In view of the above problems, an embodiment of the present invention provides an ac switching and emergency lamp operating mode control circuit, please refer to fig. 1, where fig. 1 is a schematic diagram of a comparator control circuit according to an embodiment of the present invention.
Example one
An alternating current switching and emergency lamp operating mode control circuit, comprising:
the device comprises a comparator control circuit, a power supply selection circuit and an LED emergency lamp control circuit.
The input of the comparator control circuit is windmill voltage and mains voltage, and the comparator control circuit outputs comparator control voltage to the power selection circuit.
The comparator control circuit includes: the wind power generation system comprises a first operational amplifier 2U2A, a second operational amplifier 2U2B, a third operational amplifier 2U2C, a wind power first voltage-dividing resistor 2R8, a wind power second voltage-dividing resistor 2R9, a commercial power first voltage-dividing resistor 2R15, a commercial power second voltage-dividing resistor 2R14, a wind power rectifier diode 2D5, a commercial power rectifier diode 2D4, a wind power current-limiting diode 2D6, a wind power current-limiting resistor 2R12, a first voltage-dividing resistor 2R11, a second voltage-dividing resistor 2R10, a third voltage-dividing resistor 2R17, a fourth voltage-dividing resistor 2R16, a wind power filter capacitor 2C3 and a commercial power filter capacitor 2C 5.
The windmill electric connection end L2 is grounded through the windmill electric rectifier diode 2D5 and the windmill electric filter capacitor 2C3 in sequence, and the windmill electric voltage peak value is obtained through half-wave rectification filtering.
The windmill electric connection end L2 is grounded through the windmill electric rectifier diode 2D5, the windmill electric first voltage-dividing resistor 2R8 and the windmill electric second voltage-dividing resistor 2R9 in sequence, the same-direction input end of the first operational amplifier 2U2A is electrically connected with the windmill electric first voltage-dividing resistor 2R8 and the windmill electric second voltage-dividing resistor 2R9, and the divided windmill electric voltage peak value is provided to the same-direction input end of the first operational amplifier 2U 2A.
The mains supply access end L1 is grounded through the mains supply rectifying diode 2D4 and the mains supply filtering capacitor 2C5 in sequence, and the peak value of the mains supply voltage is obtained through half-wave rectifying and filtering.
The mains supply access end L1 is grounded through the mains supply rectifying diode 2D4, the mains supply first voltage-dividing resistor 2R15 and the mains supply second voltage-dividing resistor 2R14 in sequence; the inverting input terminal of the second operational amplifier 2U2B is electrically connected to the first voltage dividing resistor 2R15 and the second voltage dividing resistor 2R14, and provides the divided peak value of the mains voltage to the inverting input terminal of the second operational amplifier 2U 2B.
The low-voltage input end is grounded through the first voltage-dividing resistor 2R11 and the second voltage-dividing resistor 2R10 in sequence, voltage division is formed on the second voltage-dividing resistor 2R10, the low-voltage input end is grounded through the third voltage-dividing resistor 2R17 and the fourth voltage-dividing resistor 2R16 in sequence, and voltage division is formed on the fourth voltage-dividing resistor 2R 16. Illustratively, the voltage at the low voltage input is 12V.
The inverting input terminal of the first operational amplifier 2U2A is electrically connected to the first voltage-dividing resistor 2R11 and the second voltage-dividing resistor 2R10, the divided voltage of the second voltage-dividing resistor 2R10 is provided to the inverting input terminal of the first operational amplifier 2U2A, so as to obtain the output terminal level of the first operational amplifier 2U2A, and the windmill current limiting diode 2D6 and the windmill current limiting resistor 2R12 adjust the output terminal level of the first operational amplifier 2U 2A. Illustratively, the voltage division of the second voltage-dividing resistor 2R10 is 5V.
The equidirectional input end of the second operational amplifier 2U2B is electrically connected to the third voltage dividing resistor 2R17 and the fourth voltage dividing resistor 2R16, and supplies the divided voltage of the fourth voltage dividing resistor 2R16 to the equidirectional input end of the second operational amplifier 2U2B, so as to obtain the output end level of the second operational amplifier 2U 2B. Illustratively, the partial voltage of the fourth voltage dividing resistor 2R16 is 5V.
The comparator control voltage is determined by the windmill voltage and the mains voltage:
when the utility power voltage is higher than the utility power reference voltage and the windmill voltage is lower than the windmill power reference voltage, the output end a of the first operational amplifier 2U2A is at a low level, the output end of the second operational amplifier 2U2B is at a low level, and the comparator control voltage H is at a low level.
When the utility power voltage is higher than the utility power reference voltage and the windmill voltage is higher than the windmill voltage reference voltage, the output end a of the first operational amplifier 2U2A is at a high level, the output end of the second operational amplifier 2U2B is at a low level, so that the high level of the output end a is changed into a low level after passing through the windmill current limiting diode 2D6 and the windmill current limiting resistor 2R12, and the comparator controls the voltage H to be at a low level.
When the utility power voltage is lower than the utility power reference voltage and the windmill voltage is higher than the windmill voltage reference voltage, the output end a of the first operational amplifier 2U2A is at a high level, the output end of the second operational amplifier 2U2B is at a low level, so that the output end a is still at a high level after passing through the windmill current limiting diode 2D6 and the windmill current limiting resistor 2R12, and the comparator control voltage H is at a high level.
And when the mains supply voltage is lower than the mains supply reference voltage and the windmill voltage is lower than the windmill voltage reference voltage, the comparator controls the voltage H to be 0.
For example, the wind turbine reference voltage is 85V ac voltage, and the utility power reference voltage is 85V ac voltage.
Fig. 2 is a schematic diagram of a power selection circuit according to an embodiment of the present application, and referring to fig. 2, the comparator control voltage is a voltage at a point H in fig. 1 and fig. 2.
The power supply selection circuit includes:
a windmill electric control relay 2DJ2, a utility electric control relay 2DJ1, a first drain resistor 2R2, a second drain resistor 2R3, a first switching tube 2Q1, a second switching tube 2Q2, and a third switching tube 2Q 3;
the gate of the first switch tube 2Q1 is electrically connected to the gate of the second switch tube 2Q2, the source of the first switch tube 2Q1 is electrically connected to the source of the second switch tube 2Q2, and the source of the first switch tube 2Q1 is electrically connected to the source of the third switch tube 2Q 3.
The input of the power supply selection circuit is the comparator control voltage, and the power supply mode of the LED emergency lamp alternating current switching circuit is switched by controlling the on-off of the relay.
When the comparator control voltage is at a high level, the first switch tube 2Q1 and the second switch tube 2Q2 are turned on, and the third switch tube 2Q3 is turned off, so that the utility power controller 2DJ1 is turned off, the windmill electric controller 2DJ2 is pulled in, and the windmill electric power supply mode is switched to charge the emergency backup battery.
When the comparator control voltage is at a low level, the first switch tube 2Q1 and the second switch tube 2Q2 are cut off, the third switch tube 2Q3 is turned on, so that the commercial power controller 2DJ1 is pulled in, the windmill electric controller 2DJ2 is turned off, and the mode is switched to a commercial power supply mode to charge an emergency backup battery.
When the comparator control voltage is 0, the windmill electric controller (2DJ2) and the commercial power controller (2DJ1) are both disconnected, and the emergency backup battery mode is switched.
The emergency backup battery is not shown in the embodiments of the present application.
Fig. 3 is a schematic diagram of an LED emergency lamp control circuit according to an embodiment of the present application, and referring to fig. 3, the LED emergency lamp control circuit includes:
the LED emergency lamp comprises a light emitting diode (2D7), a phototriode (2Q4), an LED emergency lamp control circuit resistor (2R13), a constant-current control module (U3) and an LED emergency lamp;
the anode of the light emitting diode (2D7) is electrically connected with the output end of the second operational amplifier (2U2B) through the LED emergency lamp control circuit resistor (2R 13); the collector electrode of the phototriode (2Q4) is electrically connected with the LED emergency lamp through the constant current control module (U3).
And the LED emergency lamp control circuit controls the state of the LED emergency lamp according to the comparator control voltage.
When the comparator control voltage is at a high level, the light emitting diode (2D7) is conducted, so that the phototriode (2Q4) is conducted, the enabling end of the constant current control module (U3) does not work, the constant current control module (U3) does not have constant current output, the LED emergency lamp is not turned on, and the state that the LED emergency lamp is in a windmill power supply mode is prompted;
under a general condition, the LED emergency lamp alternating current switching circuit is in a windmill power supply mode 24 hours all day, and the service life of the LED emergency lamp can be prolonged by controlling the LED emergency lamp not to be turned on.
When comparator control voltage is low level, emitting diode (2D7) end for phototriode (2Q4) ends, the work of the enable end of constant current control module (U3), constant current control module (U3) has the constant current output, the LED emergency light is bright, and the suggestion is in non-windmill electricity mode of supplying power, can detect whether the LED emergency light can normally work this moment.
When comparator control voltage is 0, uses emergent backup battery power supply, emitting diode (2D7) end, makes phototriode (2Q4) end, constant current control module (U3) have the constant current output, the LED emergency light is bright, and the suggestion is in non-windmill electricity mode of supplying power, can detect the LED emergency light this moment and whether can normally work.
The embodiment of the application provides an alternating current switching and emergency light working mode control circuit, and the alternating current switching circuit comprises a comparator control circuit, a power supply selection circuit and an LED emergency light control circuit. The windmill electric connection end is grounded through a windmill electric rectifier diode, a windmill electric first voltage-dividing resistor and a windmill electric second voltage-dividing resistor in sequence; the same-direction input end of the first operational amplifier is electrically connected with a second voltage-dividing resistor of the windmill electricity to obtain the windmill electricity voltage division. The commercial power access end is grounded through a commercial power rectifying diode, a commercial power first voltage dividing resistor and a commercial power second voltage dividing resistor in sequence; the reverse input end of the second operational amplifier is electrically connected with a second voltage division resistor of the commercial power to obtain the commercial power voltage division. The output end of the first operational amplifier is electrically connected with the output end of the second operational amplifier through the windmill current limiting diode and the windmill current limiting resistor in sequence, and the two output ends jointly determine the control voltage of the comparator.
According to the embodiment of the application, the comparator control voltage of the comparator control circuit is input to the power supply selection circuit, and the automatic switching among the three working modes of the mains supply mode, the windmill power supply mode and the emergency backup battery mode is realized by controlling the on-off of the relay. The windmill electricity is long in electricity supply time, the LED emergency lamp is controlled not to be on under the condition of windmill electricity supply, and the service life of the LED emergency lamp can be prolonged. The LED emergency lamp is controlled to be on under the condition that no windmill power supply exists, so that whether the LED emergency lamp can work normally or not is detected.
The aspects of the present application have been described in detail hereinabove with reference to the accompanying drawings. In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. Those skilled in the art should also appreciate that the acts and modules referred to in the specification are not necessarily required in the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application may be sequentially adjusted, combined, and deleted according to actual needs, and the modules in the device of the embodiment of the present application may be combined, divided, and deleted according to actual needs.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems and methods according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (9)
1. An alternating current switching and emergency lamp operating mode control circuit, comprising:
the device comprises a comparator control circuit, a power supply selection circuit and an LED emergency lamp control circuit;
the comparator control circuit includes: a first operational amplifier (2U2A), a second operational amplifier (2U2B), a third operational amplifier (2U2C), a windmill power first voltage-dividing resistor (2R8), a windmill power second voltage-dividing resistor (2R9), a commercial power first voltage-dividing resistor (2R15) and a commercial power second voltage-dividing resistor (2R14), a windmill power rectifier diode (2D5), a commercial power rectifier diode (2D4), a windmill power current-limiting diode (2D6) and a windmill power current-limiting resistor (2R 12);
the windmill electric connection terminal (L2) is grounded through the windmill electric rectifier diode (2D5), the windmill electric first voltage-dividing resistor (2R8) and the windmill electric second voltage-dividing resistor (2R9) in sequence; the same-direction input end of the first operational amplifier (2U2A) is electrically connected with the windmill electricity first voltage-dividing resistor (2R8) and the windmill electricity second voltage-dividing resistor (2R 9); the first operational amplifier (2U2A) is electrically connected with the output end of the second operational amplifier (2U2B) through the windmill current limiting diode (2D6) and the windmill current limiting resistor (2R12) in sequence;
the mains supply access end (L1) is grounded through the mains supply rectifying diode (2D4), the mains supply first voltage-dividing resistor (2R15) and the mains supply second voltage-dividing resistor (2R14) in sequence; the inverting input end of the second operational amplifier (2U2B) is electrically connected with the mains supply first voltage-dividing resistor (2R15) and the mains supply second voltage-dividing resistor (2R 14); the comparator control circuit obtains comparator control voltage according to the windmill voltage and the mains supply voltage, and provides the comparator control voltage for the power supply selection circuit;
the power supply selection circuit controls the on-off of the relay according to the comparator control voltage, and switches a power supply mode;
and the LED emergency lamp control circuit controls the state of the LED emergency lamp according to the comparator control voltage.
2. The ac switching and emergency lamp operating mode control circuit of claim 1, wherein the power selection circuit comprises:
the system comprises a windmill electric control relay (2DJ2), a commercial power control relay (2DJ1), a first drain resistor (2R2), a second drain resistor (2R3), a first switching tube (2Q1), a second switching tube (2Q2) and a third switching tube (2Q 3);
the grid electrode of the first switch tube (2Q1) is electrically connected with the grid electrode of the second switch tube (2Q2), the source electrode of the first switch tube (2Q1) is electrically connected with the source electrode of the second switch tube (2Q2), and the source electrode of the first switch tube (2Q1) is electrically connected with the source electrode of the third switch tube (2Q 3).
3. The ac power switching and emergency light operation mode control circuit according to claim 1, wherein the switching of the power supply mode of the LED emergency light ac power switching circuit according to the on/off of the comparator control voltage control relay comprises:
when the comparator control voltage is at a high level, the first switch tube (2Q1) and the second switch tube (2Q2) are connected, the third switch tube (2Q3) is cut off, so that the commercial power controller (2DJ1) is disconnected, the windmill electric controller (2DJ2) is attracted and switched to a windmill electric power supply mode, and an emergency backup battery is charged;
when the comparator control voltage is in a low level, the first switch tube (2Q1) and the second switch tube (2Q2) are cut off, the third switch tube (2Q3) is conducted, so that the commercial power controller (2DJ1) is attracted, the windmill electric controller (2DJ2) is disconnected, a commercial power supply mode is switched to, and the emergency backup battery is charged;
when the comparator control voltage is 0, the windmill electric controller (2DJ2) and the commercial power controller (2DJ1) are both disconnected, and the emergency backup battery mode is switched.
4. The ac switching and emergency light mode control circuit of claim 1, wherein the comparator control voltage is determined by the windmill voltage and the utility voltage:
when the commercial power voltage is higher than the commercial power reference voltage and the windmill voltage is lower than the windmill voltage reference voltage, the comparator controls the voltage to be at a low level;
when the mains supply voltage is higher than the mains supply reference voltage and the windmill voltage is higher than the windmill voltage reference voltage, the comparator controls the voltage to be at a low level;
when the mains supply voltage is lower than the mains supply reference voltage and the windmill voltage is higher than the windmill voltage reference voltage, the comparator controls the voltage to be at a high level;
and when the mains supply voltage is lower than the mains supply reference voltage and the windmill voltage is lower than the windmill voltage reference voltage, the comparator controls the voltage to be 0.
5. The ac switching and emergency lamp operating mode control circuit of claim 1, wherein said comparator control circuit further comprises:
a first voltage dividing resistor (2R11), a second voltage dividing resistor (2R10), a third voltage dividing resistor (2R17) and a fourth voltage dividing resistor (2R 16);
the low-voltage input end is grounded through the first voltage-dividing resistor (2R11) and the second voltage-dividing resistor (2R10) in sequence, and the low-voltage input end is grounded through the third voltage-dividing resistor (2R17) and the fourth voltage-dividing resistor (2R16) in sequence;
the inverting input end of the first operational amplifier (2U2A) is electrically connected with the first voltage-dividing resistor (2R11) and the second voltage-dividing resistor (2R10), and the non-inverting input end of the second operational amplifier (2U2B) is electrically connected with the third voltage-dividing resistor (2R17) and the fourth voltage-dividing resistor (2R 16); the divided voltage of the second voltage dividing resistor (2R10) is supplied to an inverting input terminal of the first operational amplifier (2U2A), and the divided voltage of the fourth voltage dividing resistor (2R16) is supplied to a non-inverting input terminal of the second operational amplifier (2U 2B).
6. The ac switching and emergency lamp operating mode control circuit of claim 1, wherein said comparator control circuit further comprises:
a windmill electric filter capacitor (2C3) and a mains supply filter capacitor (2C 5);
the windmill electric access terminal (L2) is grounded through the windmill electric rectifier diode (2D5) and the windmill electric filter capacitor (2C3) in sequence, and the voltage peak value of the windmill electric is obtained through half-wave rectification filtering;
the mains supply access end (L1) is grounded through the mains supply rectifying diode (2D4) and the mains supply filter capacitor (2C5) in sequence, and a mains supply voltage peak value is obtained through half-wave rectifying and filtering.
7. An alternating current switching and emergency light operation mode control circuit according to claim 1, wherein the windmill current limiting diode (2D6) and the windmill current limiting resistor (2R12) adjust the output terminal level of the first operational amplifier (2U 2A).
8. The ac switching and emergency lamp operating mode control circuit of claim 1, wherein the LED emergency lamp control circuit comprises:
the LED emergency lamp comprises a light emitting diode (2D7), a phototriode (2Q4), an LED emergency lamp control circuit resistor (2R13), a constant-current control module (U3) and an LED emergency lamp;
the anode of the light emitting diode (2D7) is electrically connected with the output end of the second operational amplifier (2U2B) through the LED emergency lamp control circuit resistor (2R 13); the collector electrode of the phototriode (2Q4) is electrically connected with the LED emergency lamp through the constant current control module (U3).
9. The ac power switching and emergency light operation mode control circuit according to claim 1, wherein the controlling the state of the LED emergency light according to the comparator control voltage comprises:
when the comparator control voltage is at a high level, the light emitting diode (2D7) is conducted, so that the phototriode (2Q4) is conducted, the constant current control module (U3) has no constant current output, and the LED emergency lamp is not lighted;
when the comparator control voltage is at a low level, the light emitting diode (2D7) is cut off, so that the phototriode (2Q4) is cut off, the constant current control module (U3) has a constant current output, and the LED emergency lamp is on;
when the comparator control voltage is 0, an emergency backup battery is used for supplying power, the light emitting diode (2D7) is cut off, so that the phototriode (2Q4) is cut off, the constant current control module (U3) has constant current output, and the LED emergency lamp is turned on.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111595486.4A CN114423113A (en) | 2021-12-23 | 2021-12-23 | Alternating current switching and emergency lamp working mode control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111595486.4A CN114423113A (en) | 2021-12-23 | 2021-12-23 | Alternating current switching and emergency lamp working mode control circuit |
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Application publication date: 20220429 |