CN117279157A - Emergency lighting lamp circuit and lighting system - Google Patents
Emergency lighting lamp circuit and lighting system Download PDFInfo
- Publication number
- CN117279157A CN117279157A CN202310890492.5A CN202310890492A CN117279157A CN 117279157 A CN117279157 A CN 117279157A CN 202310890492 A CN202310890492 A CN 202310890492A CN 117279157 A CN117279157 A CN 117279157A
- Authority
- CN
- China
- Prior art keywords
- circuit
- input
- voltage
- emergency lighting
- discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007599 discharging Methods 0.000 claims abstract description 43
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 85
- 238000002955 isolation Methods 0.000 claims description 13
- 238000005286 illumination Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 15
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 102100031786 Adiponectin Human genes 0.000 description 3
- 101000775469 Homo sapiens Adiponectin Proteins 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/105—Controlling the light source in response to determined parameters
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
-
- 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
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
-
- 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
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The application discloses control scheme of emergency lighting lamp, AC input voltage passes through power supply unit and supplies power to lighting load, and power supply unit includes voltage conversion circuit and battery, and voltage conversion circuit receives AC input voltage is in order to supply power to the light and for the battery charges, under the condition that does not have AC input voltage, when needs emergency lighting lamp keep illumination, then through the battery gives the emergency lighting lamp power supply, discharge circuit with at least one input of AC input voltage is connected in order to right the voltage of AC input is discharged. According to the system, the voltage at the alternating current input end is discharged through the discharging circuit, so that whether the alternating current input exists or not can be accurately judged by the system, the internal battery is controlled to start emergency lighting, and the emergency lighting is ensured to be smoothly started in some specific occasions.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to an emergency lighting lamp circuit and a lighting system.
Background
In an emergency lighting system, two lines are included to power a light source load, such as an LED lamp, one line is an ac input to directly power the load through a switching converter, and the other line is an emergency battery to power the load. In the case of a normal ac input, the ac input is converted to a suitable voltage supply load by a switching converter, such as an ACDC converter; in the absence of an ac input, the load is powered by the emergency battery if the impedance of the two inputs L/N is less than a preset value, and the lighting system is turned off if it is greater than the preset value.
However, in an environment with a fan or an elevator, the impedance of the input end is erroneously detected, which is caused by that when the switch of the L/N end is turned off, that is, when no ac is input, there is still a residual ac voltage, and the residual voltage causes that the erroneous detection of the input end considers that an ac input exists, and at this time, the emergency lighting cannot be turned on, thereby causing a situation that the load cannot work.
Accordingly, there is a need to provide an improved solution to overcome the above technical problems in the prior art.
Disclosure of Invention
Accordingly, an object of the present invention is to provide an emergency lighting lamp circuit and a lighting system, which are used for solving the technical problem of false detection in some environments in the prior art.
The invention provides an emergency lighting lamp circuit, which supplies power to a lighting load through a power supply device by using alternating current input voltage, and comprises a voltage conversion circuit and a battery, wherein the voltage conversion circuit receives the alternating current input voltage to supply power to the lighting lamp and charge the battery, and the emergency lighting control circuit controls the battery to supply power to the emergency lighting lamp when the emergency lighting lamp is required to keep lighting under the condition of no alternating current input voltage, and the lighting load comprises the lighting lamp and the emergency lighting lamp, wherein the emergency lighting control circuit comprises a discharging circuit, and the discharging circuit is connected with the input end of the alternating current input voltage or an end point of the lighting load so as to discharge the voltage of a connecting node to enable the emergency lighting control circuit to judge whether the alternating current input voltage exists or not.
Preferably, the discharge circuit discharges the voltage of the ac input terminal at a predetermined current.
Preferably, the discharge circuit is connected to at least one input of the ac input voltage to discharge the voltage of the ac input.
Preferably, the emergency lighting control circuit includes an ac input detection circuit connected to one input end of the ac input to obtain an input detection signal, and compares the input detection signal with a first threshold voltage, and when the input detection signal is lower than the first threshold voltage, the discharge circuit is controlled to discharge the voltage of the ac input end.
Preferably, when the input detection signal is higher than the first threshold voltage, the discharging circuit is controlled to stop discharging the voltage of the ac input end, and after a period of time is delayed, a timer starts to count time, and when the input detection signal is lower than the first threshold voltage or the timer reaches a preset value, the discharging circuit is controlled to discharge the voltage of the ac input end.
Preferably, the discharging circuit includes a first discharging circuit connected to one input terminal of the ac input voltage and a second discharging circuit connected to the other input terminal of the ac input voltage.
Preferably, the first discharging circuit comprises any one of a switching tube, a resistor and a switching tube which are connected in series, a switching tube which is connected in series and a current source; the second discharging circuit comprises any one of a switching tube, a resistor and a switching tube which are connected in series, a switching tube which is connected in series and a current source.
Preferably, the first discharging circuit includes any one of a resistor and a current source; the second discharge circuit includes any one of a resistor and a current source.
Preferably, the power supply device further comprises a high-voltage isolation circuit, the emergency lighting control circuit comprises an impedance detection circuit, the high-voltage isolation circuit is connected between the alternating current input end and the battery, when alternating current input exists, the high-voltage isolation circuit is used for isolating the alternating current input end and the battery, the impedance detection circuit is used for detecting the impedance of the two alternating current input ends so as to generate an impedance detection result, and the emergency lighting control circuit judges whether to start the battery to supply power to the emergency lighting lamp according to the impedance detection result under the condition that no alternating current input voltage exists.
Preferably, the impedance detection circuit is connected to one input end of the ac input to obtain an input detection signal, and compares the input detection signal with a second threshold voltage to obtain the impedance detection result, the emergency lighting control circuit includes a switch control circuit and a first switch tube, the switch control circuit receives the comparison result of the ac input detection circuit and the impedance detection result, and in the case that both are in an effective state, the first switch tube is controlled to be turned on to enable the battery to supply power to the lighting lamp.
Preferably, the discharging circuit is connected with an endpoint of the lighting load to discharge the voltage of the connection node, the emergency lighting control circuit includes an impedance detection circuit, a comparison circuit, a switch control circuit and a first switch tube, the impedance detection circuit obtains an input detection signal according to one input end connected with the alternating current input, and compares the input detection signal with a second threshold voltage to obtain the impedance detection result, the comparison circuit compares the voltage of the connection node of the discharging circuit and the lighting load with a reference voltage to obtain a comparison signal, and the switch control circuit receives the comparison result of the comparison signal and the impedance detection result, and in the case that both are in an effective state, controls the first switch tube to be conducted so that the battery supplies power to the lighting lamp.
In a second aspect, a lighting system is provided, including the emergency lighting circuit described above and a lighting load, the emergency lighting circuit receiving an ac input voltage to control normal lighting and emergency lighting of the lighting load.
By adopting the control scheme of the emergency lighting lamp, the residual voltage existing at the alternating current input end or the end point voltage of the lighting load is discharged through the discharging circuit, so that the system can accurately judge whether the alternating current input exists, and under the condition that the alternating current input does not exist, the emergency lighting lamp is started through the built-in battery, and the emergency lighting lamp is ensured to be smoothly started in some specific occasions.
Drawings
FIG. 1 is a circuit block diagram of a first embodiment of an emergency light circuit according to the present invention;
FIG. 2 is a circuit block diagram of a second embodiment of an emergency light circuit according to the present invention;
FIG. 3 is a circuit block diagram of a third embodiment of an emergency light circuit according to the present invention;
FIG. 4 is a specific circuit diagram according to the embodiment of FIG. 2;
FIG. 5 is a specific circuit diagram of the AC input detection circuit, the impedance detection circuit, and the switch control circuit according to the embodiment of FIG. 2;
FIG. 6 is a specific circuit diagram of the discharge control unit according to the embodiment of FIG. 3;
FIG. 7 is a circuit diagram of a first embodiment of a discharge circuit;
FIG. 8 is a circuit diagram of a second embodiment of a discharge circuit;
fig. 9 is a circuit diagram of a third embodiment of a discharge circuit.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments only. The invention is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the invention.
In the following description of preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention, and the invention will be fully understood to those skilled in the art without such details.
The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. It should be noted that the drawings are in a simplified form and are not to scale precisely, but rather are merely intended to facilitate and clearly illustrate the embodiments of the present invention.
Referring to fig. 1, which is a circuit block diagram of a first embodiment of an emergency lighting circuit according to the present invention, the present application is applied to a lighting system, an ac input voltage supplies a lighting load through a power supply device, where the power supply device includes a voltage conversion circuit and a battery, the voltage conversion circuit receives the ac input voltage to supply the lighting and charges the battery, the voltage conversion circuit uses an ACDC converter as an example, in the presence or absence of the ac input voltage, converts the ac input voltage to a desired dc power supply to supply the lighting through the ACDC converter, and an emergency lighting control circuit controls the battery to supply the lighting load including the lighting and the emergency lighting when the lighting is required to maintain lighting, and the emergency lighting control circuit controls the battery to supply the lighting load when the emergency lighting is required to maintain lighting. The emergency lighting control circuit includes a discharge circuit, which in this example is connected to at least one input of the ac input voltage to discharge the voltage of the ac input, where the discharge circuit may be a discharge circuit connected to one input; two discharge circuits may be connected to the two input terminals, respectively, to perform discharge. The voltage conversion circuit may include a rectifying current to rectify an ac input voltage to obtain an input dc voltage, and the voltage conversion circuit may be a voltage supply battery charging by supplying the dc input voltage to the battery through a switch or a voltage coupling to the battery through a winding or an output terminal.
FIG. 1 is a circuit block diagram of a second embodiment of an emergency lighting circuit according to the present invention, taking a discharge circuit as an example, FIG. 2; for example, the two discharging circuits include a first discharging circuit and a second discharging circuit, the first discharging circuit is connected with one input end of the ac input voltage, and the second discharging circuit is connected with the other input end of the ac input voltage.
Preferably, the discharge circuit discharges the voltage of the ac input terminal at a predetermined current. The discharge circuit may discharge the voltage at the ac input terminal with a constant current, or may discharge the voltage at the ac input terminal with a variable current. The value of the predetermined current is generally set to a small value to avoid too much power consumption.
Referring to fig. 4, fig. 5 is a circuit diagram of the embodiment of fig. 2, fig. 5 is a circuit diagram of the ac input detection circuit, the impedance detection circuit, and the switch control circuit according to the embodiment of fig. 2, and fig. 6 is a circuit diagram of the discharge control unit according to the embodiment of fig. 3. Referring to fig. 4 and 5, the discharge on-off of the discharge circuit is controlled by the discharge control unit, the discharge control unit is connected with the input voltage detection circuit, where the emergency lighting control circuit includes an ac input detection circuit, the ac input detection circuit includes a detection circuit (resistors R1 and R2) and a comparator U1, rd is an equivalent resistor between two input terminals, the detection circuit is connected with one input terminal of the ac input voltage to obtain an input detection signal, the input detection signal is compared with a first threshold voltage Vref1, and when the input detection signal is smaller than the first threshold voltage Vref1, the comparison result Vu1 output by the comparator U1 is in a high level valid state, and the discharge control unit starts the discharge of the discharge circuit according to the comparison result of the comparator U1. When the input detection signal is greater than the first threshold voltage Vref1, the comparison result Vu1 is in a low-level effective state, the discharge control unit turns off the discharge circuit, and at this time, after a period of time, a timer, such as timer 2, starts to count, and when the input detection signal is lower than the first threshold voltage or the timer reaches, the discharge circuit is controlled to discharge the voltage of the AC input end. The cycle is such that the duration of the preset value of the timer 2 is less than or equal to half a power frequency cycle, as will be appreciated by those skilled in the art. Referring to fig. 6, the discharge control unit receives the comparison result Vu1 and the non-signal of the comparison result Vu1, and the non-signal of the comparison result Vu1 is delayed to obtain the starting time of the timer, and the non-signal of the comparison result Vu1 resets the last count of the timer, and the signals of the comparison result Vu1 and the timer 2 are or-gate-controlled to obtain the signal controlling the discharge circuit.
Referring to fig. 7, 8 and 9, the discharge circuit may include a first discharge circuit including any one of a switching tube, a series resistor and a switching tube such as a switching tube Q1 and a resistor R3, a series switching tube and a current source, or a first discharge circuit and a second discharge circuit; the second discharging circuit comprises a switching tube, a resistor and any one of switching tubes such as a switching tube Q2 and a resistor R4 which are connected in series, and a switching tube and a current source which are connected in series, wherein the discharging condition of the discharging circuit, such as discharging time and discharging duration, is controlled through the switching tube, the discharging can be controlled better, and the switching tube can control the switching state according to the comparison result of the input voltage detection. The first discharge circuit described with reference to fig. 9 includes any one of a resistor and a current source, such as the current source I1; the second discharging circuit comprises any one of a resistor and a current source I2. It is known to those skilled in the art that the above-described discharging circuit can be implemented to discharge the voltage at the input terminal with a predetermined current.
With continued reference to fig. 5, the power supply device further includes an impedance detection circuit, a high-voltage isolation circuit, and a switch module, where the switch module includes a switch control circuit and a first switch tube S1, the impedance detection circuit includes a comparator U2 for detecting the impedance of two ac input ends to generate an impedance detection result, and the impedance detection circuit obtains an input detection signal according to an input end connected to the ac input, and compares the input detection signal with a second threshold voltage Vref2 to obtain the impedance detection result Vu2. The ac input detection circuit further includes a timer 1, and when the timer 1 receives the comparison result of the comparator U1, which is continuously in the low level inactive state and is maintained for a period of time, it is determined that there is no input ac voltage, and the non-signal of the comparator U1 is used to reset the timer 1, and the timer 1 outputs the signal Vj to the switch control circuit. Under the condition that the switch control circuit receives the output signal of the timer 1 and the impedance detection result are in an effective state, the switch control circuit receives the output signal of the timer 1 and the impedance detection result, the emergency lighting control circuit controls the battery to not supply power to the emergency lighting lamp according to the impedance detection result, if the impedance detection result is in a high-impedance state and does not need to start emergency lighting under the condition that no alternating-current input voltage exists, the impedance detection result is in a low-impedance state, the condition that power failure occurs is indicated, the emergency lighting is required to start, the battery is controlled to supply power to the emergency lighting lamp, the first switch tube S1 is controlled to be conducted, the battery supplies power to the lighting lamp, and the switch S1 is used for connecting the battery and an emergency lighting lamp load. The switch control circuit comprises an AND gate, a trigger, a switch driving circuit and a sampling circuit, wherein the AND gate receives a comparison result and an impedance detection result and outputs a high-level effective signal under the condition that the AND gate is in an effective state, the trigger generates a trigger signal to the switch driving circuit to control the switch S1 to be conducted, a battery supplies power to an emergency lamp load, and the sampling circuit feeds back the current of the battery for supplying power to the emergency lamp.
Referring to fig. 5, the high-voltage isolation circuit is connected between the ac input end and the battery, and is used for isolating connection between the ac input end and the battery when there is ac input, the high-voltage isolation circuit includes an isolation switch, the isolation switch controls on-off according to a comparison result of the ac input detection circuit, and when the comparison result represents no ac input voltage, the isolation switch is turned on. The high voltage isolation circuit may also be a diode, which also isolates the high voltage input from the battery.
Referring to fig. 3, which is a circuit block diagram of a third embodiment of an emergency lighting lamp circuit according to the present invention, an emergency lighting control circuit in this embodiment is the same as an impedance detection circuit, a switch module, and a high-voltage isolation module in the first embodiment, and is not described in detail herein, except that in this example, the discharging circuit is connected to an end point of the lighting load to discharge a connection node voltage, the emergency lighting control circuit includes an impedance detection circuit, a comparison circuit, a switch control circuit, and a first switching tube, the impedance detection circuit obtains an input detection signal according to an input end connected to the ac input, and compares the input detection signal with a second threshold voltage to obtain the impedance detection result, the comparison circuit compares a connection node voltage of the discharging circuit and the lighting load with a reference voltage to obtain a comparison signal, where the reference voltage is a working voltage of the connected lighting load, and the switch control circuit receives the comparison result of the comparison signal and the impedance detection result, and in case that both are in an effective state, controls the first switching tube to turn on the lighting lamp. Here, the lighting load may include a plurality of beads, and the connected lighting load may be a partial load of the lighting load. In this example, the discharging circuit may be a small current source, which is configured to pull down the load voltage connected to the discharging circuit by a small current, and when there is no ac input voltage, the voltage of the connection node between the discharging circuit and the lighting load is smaller than the reference voltage, and when there is an ac input voltage, the voltage of the connection node between the discharging circuit and the lighting load is consistent with the reference voltage. When no AC input voltage exists only and residual voltage exists, the voltage of the connection node between the discharge circuit and the lighting load is smaller than the reference voltage, so that whether the AC input voltage exists or not can be accurately judged, and the emergency lighting lamp can be accurately started.
The application also provides a lighting system, which comprises the emergency lighting lamp circuit and a lighting load, wherein the emergency lighting lamp circuit receives alternating input voltage so as to control normal lighting and emergency lighting of the lighting lamp.
According to the lighting system, the voltage at the alternating current input end is discharged through the discharging circuit, or the voltage of the load is discharged, in special cases, such as when the alternating current input is actually disconnected in an elevator, the discharging circuit discharges the residual voltage of the alternating current input, so that the system can accurately judge whether the alternating current input exists, and under the condition that the alternating current input does not exist, emergency lighting is started through the built-in battery, and the emergency lighting lamp is ensured to be smoothly started in some specific occasions.
It should be noted that the detailed description and the corresponding drawings are merely illustrative of one way of implementing the method of the invention and are not limiting of the specific structure of the embodiments of the invention, and many changes or modifications may be made to these embodiments without departing from the principles and spirit of the invention, but these changes and modifications fall within the scope of the invention.
Although the embodiments have been described and illustrated separately above, and with respect to a partially common technique, it will be apparent to those skilled in the art that alternate and integration may be made between embodiments, with reference to one embodiment not explicitly described, and reference may be made to another embodiment described.
The above-described embodiments do not limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the above embodiments should be included in the scope of the present invention.
Claims (12)
1. An emergency lighting lamp circuit, wherein an alternating input voltage supplies power to a lighting load through a power supply device, comprising,
the power supply device comprises a voltage conversion circuit and a battery, the voltage conversion circuit receives the alternating input voltage to supply power to the lighting lamp and charge the battery,
an emergency lighting control circuit that controls the battery to supply power to the emergency lighting lamp when the emergency lighting lamp is required to maintain lighting without an ac input voltage, the lighting load including the lighting lamp and the emergency lighting lamp,
the emergency lighting control circuit comprises a discharging circuit, wherein the discharging circuit is connected with the input end of the alternating current input voltage or the end point of the lighting load so as to discharge the voltage of the connecting node to enable the emergency lighting control circuit to judge whether the alternating current input voltage exists or not.
2. The emergency lighting lamp circuit of claim 1, wherein the discharge circuit discharges the voltage at the ac input at a predetermined current.
3. The emergency lighting lamp circuit of claim 1, wherein the discharge circuit is connected to at least one input of the ac input voltage to discharge the voltage at the ac input.
4. The emergency lighting lamp circuit of claim 3, wherein the emergency lighting control circuit comprises an ac input detection circuit,
the alternating current input detection circuit is connected with one input end of the alternating current input to obtain an input detection signal, the input detection signal is compared with a first threshold voltage, and when the input detection signal is lower than the first threshold voltage, the discharge circuit is controlled to discharge the voltage of the alternating current input end.
5. The emergency lighting lamp circuit of claim 4, wherein when the input detection signal is higher than the first threshold voltage, the discharge circuit is controlled to stop discharging the voltage at the ac input terminal,
and after a period of time, starting to count through a timer, and controlling the discharge circuit to discharge the voltage of the alternating current input end when the input detection signal is lower than the first threshold voltage or the timer reaches a preset value.
6. An emergency light circuit as claimed in claim 1 or 3, wherein the discharge circuit comprises a first discharge circuit and a second discharge circuit,
the first discharge circuit is connected to one input of the ac input voltage,
the second discharging circuit is connected with the other input end of the alternating current input voltage.
7. The emergency lighting lamp circuit of claim 6, wherein the first discharge circuit comprises any one of a switching tube, a series resistor and switching tube, a series switching tube, and a current source;
the second discharging circuit comprises any one of a switching tube, a resistor and a switching tube which are connected in series, a switching tube which is connected in series and a current source.
8. The emergency light circuit of claim 6, wherein the first discharge circuit comprises any one of a resistor and a current source;
the second discharge circuit includes any one of a resistor and a current source.
9. An emergency lighting lamp circuit as defined in claim 3, wherein said power supply means further comprises a high voltage isolation circuit, said emergency lighting control circuit comprises an impedance detection circuit,
the high voltage isolation circuit is connected between the AC input terminal and the battery, and is used for isolating the AC input terminal and the battery when the AC input exists,
the impedance detection circuit is used for detecting the impedance of two alternating current input ends so as to generate an impedance detection result,
and the emergency lighting control circuit judges whether to start the battery to supply power to the emergency lighting lamp according to the impedance detection result under the condition of no alternating current input voltage.
10. The emergency lighting lamp circuit of claim 9, wherein the power supply circuit is configured to supply power to the emergency lighting lamp circuit,
the impedance detection circuit obtains an input detection signal according to an input terminal connected to the ac input, and compares the input detection signal with a second threshold voltage to obtain the impedance detection result,
the emergency lighting control circuit comprises a switch control circuit and a first switch tube, wherein the switch control circuit receives a comparison result of the alternating current input detection circuit and the impedance detection result, and under the condition that the two are in an effective state, the first switch tube is controlled to be conducted so that the battery supplies power to the lighting lamp.
11. The emergency lighting lamp circuit of claim 1, wherein the power supply circuit is configured to supply power to the emergency lighting lamp circuit,
the discharging circuit is connected with the end point of the lighting load to discharge the voltage of the connecting node,
the emergency lighting control circuit comprises an impedance detection circuit, a comparison circuit, a switch control circuit and a first switch tube,
the impedance detection circuit obtains an input detection signal according to an input terminal connected to the ac input, and compares the input detection signal with a second threshold voltage to obtain the impedance detection result,
the comparing circuit compares the voltage of the connection node of the discharging circuit and the lighting load with a reference voltage to obtain a comparison signal,
and the switch control circuit receives a comparison result of the comparison signal and the impedance detection result, and controls the first switch tube to be conducted so that the battery supplies power to the illuminating lamp under the condition that the comparison result and the impedance detection result are in an effective state.
12. A lighting system comprising the emergency lighting circuit of any one of claims 1-11 and a lighting load,
the emergency lighting lamp circuit receives an alternating input voltage to control normal lighting and emergency lighting of the lighting load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310890492.5A CN117279157A (en) | 2023-07-19 | 2023-07-19 | Emergency lighting lamp circuit and lighting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310890492.5A CN117279157A (en) | 2023-07-19 | 2023-07-19 | Emergency lighting lamp circuit and lighting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117279157A true CN117279157A (en) | 2023-12-22 |
Family
ID=89216683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310890492.5A Pending CN117279157A (en) | 2023-07-19 | 2023-07-19 | Emergency lighting lamp circuit and lighting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117279157A (en) |
-
2023
- 2023-07-19 CN CN202310890492.5A patent/CN117279157A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9496795B2 (en) | Switching power supply apparatus | |
| JP3836152B2 (en) | Power supply system for a device having a rechargeable battery, and a power supply unit and device for such a power supply system | |
| US9537417B2 (en) | Power supply control circuit and power source cut-off detection method | |
| US20100315017A1 (en) | Power converting circuit and controller thereof | |
| US8598792B2 (en) | Driving circuit for powering LED light sources | |
| JP2004134147A (en) | Lighting circuit | |
| KR20100016599A (en) | Bulb type detector for dimmer circuit and resistance and short circuit detection | |
| US9917518B2 (en) | Method and circuit of detecting attachment and detachment between a portable device and a power converter | |
| JP5107656B2 (en) | Control circuit for self-excited capacitor charging circuit, control method, capacitor charging circuit using the same, and electronic equipment | |
| KR20090057313A (en) | Ballast with frequency-diagnostic lamp fault protective circuit | |
| CA2659976C (en) | False failure prevention circuit in emergency ballast | |
| US8625317B2 (en) | Isolated switch-mode power supply device | |
| CN102299566A (en) | Wireless power receiving device and wireless power transmitting system | |
| CN117279157A (en) | Emergency lighting lamp circuit and lighting system | |
| US6847131B2 (en) | Power supply device and electronic equipment | |
| US20160336799A1 (en) | Commercial ac power shutdown detecting apparatus, and system including the same | |
| CN112068035B (en) | Power connection detection circuit and emergency lamp | |
| US8354830B2 (en) | Systems and methods for self-recycling power | |
| EP3750229A1 (en) | Emergency lighting power supply with combined zero-current detection | |
| CN110712538A (en) | Electric automobile alternating current discharging module and control method | |
| KR20150115663A (en) | Load detecting device | |
| US20190006869A1 (en) | Light emitting device and driving method thereof | |
| CN117155101B (en) | Discharge control circuit and method for X capacitor and switching power supply | |
| CN213547881U (en) | LED lamp compatible with mains supply input and high-frequency ballast input | |
| KR101452240B1 (en) | Circuit for reducing Direct Current ripple for LED lighting apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |