CN110958749A - Emergency detection and multi-input power supply lighting circuit - Google Patents
Emergency detection and multi-input power supply lighting circuit Download PDFInfo
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- CN110958749A CN110958749A CN201911159276.3A CN201911159276A CN110958749A CN 110958749 A CN110958749 A CN 110958749A CN 201911159276 A CN201911159276 A CN 201911159276A CN 110958749 A CN110958749 A CN 110958749A
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- 238000004134 energy conservation Methods 0.000 description 6
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Abstract
The invention provides an emergency detection and multi-input power supply lighting circuit, which comprises a voltage reduction module and an output voltage control module; the voltage reduction module is connected with the power input and output voltage control module, the output voltage control module is connected with the control unit, and the control unit is connected with the lighting load; the voltage reduction module converts high alternating current or high direct current input by the power supply into low alternating current or low direct current and then transmits the low alternating current or low direct current to the control output voltage module; when direct current is input, the output voltage module is controlled to be conducted and output a certain voltage to the control unit; when alternating current is input, the output voltage module is controlled to be conducted according to the frequency of the alternating current and outputs a certain voltage to the control unit; the control unit outputs different duty ratios to control the lighting load according to the received alternating current signal or direct current signal; when the power input is powered off, the output voltage module is controlled to output a low level to the control unit. By applying the technical scheme, the input voltage characteristic of the power supply can be rapidly detected.
Description
Technical Field
The invention relates to the field of illumination, in particular to an emergency detection and multi-input power supply illumination circuit.
Background
In order to be compatible with alternating current, pulsating direct current voltage and DC direct current voltage, an existing current source product generally designs a power supply as a full-voltage input power supply, and when the input is alternating current, pulsating direct current voltage and DC direct current voltage, the output brightness of the power supply is fixed, and detection and judgment are not carried out on different input voltages. In europe, australia and other markets, when the commercial power is cut off, they usually start the emergency power supply cabinet, and the output of their emergency power supply cabinet is usually DC voltage or 100Hz pulsating DC voltage. Low brightness output is generally required to achieve energy conservation in emergency situations, and earlier power supplies have not been possible. In addition, after the wall switch controls the mains supply to be input to be quickly powered on and powered off, the traditional Bluetooth or Wifi product cannot be quickly powered off due to large power supply electrolysis, and therefore quick resetting or other operations such as dimming and color mixing cannot be performed.
Disclosure of Invention
The invention aims to provide an emergency detection and multi-input power supply lighting circuit, which can realize the rapid detection of the input voltage characteristic of a power supply.
In order to solve the technical problem, the invention provides an emergency detection and multi-input power supply lighting circuit, which comprises a voltage reduction module and an output voltage control module; the voltage reduction module is connected with a power input and the control output voltage module, the control output voltage module is connected with a control unit, and the control unit is connected with a lighting load; the voltage reduction module converts high alternating current or high direct current input by the power supply into low alternating current or low direct current and then transmits the low alternating current or low direct current to the control output voltage module; when direct current is input, the control output voltage module is conducted and outputs a certain voltage to the control unit; when alternating current is input, the control output voltage module is conducted according to the frequency of the alternating current and outputs a certain voltage to the control unit; the control unit outputs different duty ratios to control the lighting load according to the received alternating current signal or direct current signal; when the power supply input is powered off, the control output voltage module outputs a low level to the control unit.
In a preferred embodiment, the voltage reduction module further includes a rectification unit; when alternating current is input, the rectifying unit of the voltage reduction module rectifies the alternating current and then inputs the rectified alternating current into the voltage control output module.
In a preferred embodiment, the output voltage control module specifically includes an optocoupler; the input end of the optical coupler is connected with the voltage reduction module, and the output end of the optical coupler is connected with the control unit.
In a preferred embodiment, the cathode of the light emitting diode of the optical coupler is connected with a switching tube, and the anode of the light emitting diode is connected with a power supply; one end of a phototriode of the optical coupler is connected with the control unit, and the other end of the phototriode is connected with a transformer.
In a preferred embodiment, the power input reaches the switching tube through the voltage reduction module to control the on-off of the switching tube, the switching tube is conducted, the optical coupler is conducted, the switching tube is not conducted, the optical coupler is not conducted, and one end of the phototriode, which is connected with the control unit, outputs a low level.
In a preferred embodiment, the voltage-reducing module specifically includes a first voltage-dividing resistor, and the rectifying unit specifically is a first diode; the positive electrode of the first diode is connected with an input power supply, the negative electrode of the first diode is connected with one end of the first divider resistor, the other end of the first divider resistor is connected with one end of a current-limiting resistor, the other end of the current-limiting resistor is connected with the negative electrode of the first voltage-stabilizing diode, the positive electrode of the first voltage-stabilizing diode is connected with the base electrode of the switch tube, the emitting electrode of the switch tube is grounded, and the collecting electrode of the switch tube is connected with the negative electrode of the light-emitting diode of the optical coupler.
In a preferred embodiment, one end of the second voltage-dividing resistor is connected between one end of the phototriode connection control unit of the optical coupler and the control unit, and the other end of the second voltage-dividing resistor is grounded; the cathode of the second voltage stabilizing diode is connected between one end of the phototriode of the optical coupler, which is connected with the control unit, and the anode of the second voltage stabilizing diode is grounded; one end of the first capacitor is connected between one end of the phototriode of the optical coupler, which is connected with the control unit, and the other end of the first capacitor is grounded;
one end of a third voltage-dividing resistor is connected with one end of a phototriode of the optical coupler, which is connected with one end of a transformer, the other end of the third voltage-dividing resistor is connected with one end of a second capacitor and the cathode of a third diode, the other end of the second capacitor is grounded, and the anode of the third diode is connected with the end of the transformer with the same name.
In a preferred embodiment, the anode of the light emitting diode of the optical coupler is connected with one end of a first resistor and one end of a second resistor, the other end of the first resistor is grounded, the other end of the second resistor is connected with one end of a third capacitor and the cathode of the second diode, and the other end of the third capacitor is grounded; and the anode of the second diode is connected with a power supply.
In a preferred embodiment, after the dc voltage is input to the voltage-reducing module and reduced by the first voltage-dividing resistor, the switching tube is controlled to be turned on, and the switching tube is turned on to turn on the light emitting diode, so that the phototriode is turned on and outputs a constant output voltage, and then outputs a high-level signal to the control unit after being divided by the second voltage-dividing resistor and the third voltage-dividing resistor.
In a preferred embodiment, the ac voltage is input to the voltage-reducing module, and is half-wave rectified by the first diode, and then is reduced by the first voltage-dividing resistor, and then the switching tube is controlled to be conductive or non-conductive, so that the light emitting diode is conductive or non-conductive, and the photo transistor is controlled to be conductive or non-conductive, so that the frequency of the conduction of the optical coupler is consistent with the frequency of the ac voltage, and the photo transistor outputs a square wave signal with the same frequency to the control unit.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
the invention provides an emergency detection and multi-input power supply lighting circuit which can quickly detect different input voltage characteristics so as to output waveform signals with different characteristics to a control unit, and the control unit outputs different duty ratios to control different brightness of a lighting load and achieve the purpose of energy conservation. The circuit can also realize the quick detection of the power failure of the mains supply, and meets the quick reset requirement of intelligent products. When the control unit obtains different signals, different responses can be made according to design requirements, and the requirements of energy conservation and multiple samples in customers and markets are met. The circuit is low in cost, high in response speed and high in reliability, and can be popularized as a basic circuit of an intelligent product.
Drawings
Fig. 1 is a schematic diagram of an emergency detection and multiple input power lighting circuit in a preferred embodiment of the present invention.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
An emergency detection and multiple-input power supply lighting circuit, referring to fig. 1, includes a voltage reduction module, a control output voltage module; the voltage reduction module is connected with a power input and the control output voltage module, the control output voltage module is connected with a control unit, and the control unit is connected with a lighting load; the voltage reduction module converts high alternating current or high direct current input by the power supply into low alternating current or low direct current and then transmits the low alternating current or low direct current to the control output voltage module; when direct current is input, the control output voltage module is conducted and outputs a certain voltage to the control unit; when alternating current is input, the control output voltage module is conducted according to the frequency of the alternating current and outputs a certain voltage to the control unit; the control unit outputs different duty ratios to control the lighting load according to the received alternating current signal or direct current signal so as to control the brightness of the lighting load, and the control unit outputs different duty ratios to the power supply to realize different brightness outputs after obtaining waveform signals with different characteristics for judgment, so that the energy-saving requirement is met. When the power supply input is powered off, the control output voltage module outputs a low level to the control unit, so that the control unit responds in time, and the quick detection of power on and power off of the commercial power is realized.
Specifically, the voltage reduction module further comprises a rectification unit; when alternating current is input, the rectifying unit of the voltage reduction module rectifies the alternating current and then inputs the rectified alternating current into the voltage control output module. The control output voltage module specifically comprises an optical coupler U2; the input end of the optical coupler U2 is connected with the voltage reduction module, and the output end of the optical coupler U2 is connected with the control unit.
Specifically, the cathode of the light emitting diode of the optocoupler U2 is connected with a switching tube Q2, and the anode of the light emitting diode is connected with a power supply; one end output of a phototriode of the optical coupler U2 is connected with the control unit, and the other end output of the phototriode is connected with a transformer. Specifically, the positive electrode of the light emitting diode of the optocoupler U2 is a first pin 1, the negative electrode of the light emitting diode of the optocoupler U2 is a second pin 2, one end of the phototriode connection control unit of the optocoupler U2 is a third pin 3, and one end of the phototriode connection transformer of the optocoupler U2 is specifically a fourth pin 4. In this embodiment, the switching transistor Q2 is specifically an NPN transistor. The power input reaches the switch tube Q2 through the voltage reduction module, controls the on-off of the switch tube Q2, the switch tube Q2 is conducted, the optical coupler U2 is conducted, the switch tube Q2 is not conducted, the optical coupler U2 is not conducted, and one end of the phototriode connected with the control unit outputs a low level.
The voltage reduction module specifically comprises a first voltage division resistor, and the rectification unit specifically is a first diode D8; the anode of the first diode D8 is connected with an input power supply, the cathode of the first diode D8 is connected with one end of the first divider resistor, and the other end of the first divider resistor is connected with one end of a current-limiting resistor R7; specifically, the first voltage dividing resistor is formed by connecting a fourth resistor R4 and a fifth resistor R5 in series, the fifth resistor R5 is further connected with a sixth resistor R6, the other end of the sixth resistor R6 is grounded, and one end of the current limiting resistor R7 is connected between the fifth resistor R5 and the sixth resistor R6. The other end of the current-limiting resistor R7 is connected with the cathode of a first voltage-stabilizing diode ZD1, the anode of the first voltage-stabilizing diode ZD1 is connected with the base of a switch tube Q2, the emitter of the switch tube Q2 is grounded, the collector of the switch tube Q2 is connected with the second pin 2 of the optical coupler U2, and the two ends of a third resistor R7A are connected between the emitter of the switch tube Q2 and the base of the switch tube Q2.
One end of a second voltage-dividing resistor R11 is connected between the third pin 3 of the optocoupler U2 and the control unit, and the other end of the second voltage-dividing resistor R11 is grounded; the cathode of the second zener diode ZD2 is connected between the third pin 3 of the optocoupler U2 and the control unit, and the anode of the second zener diode ZD2 is grounded; one end of a first capacitor C9 is connected between the third pin 3 of the optocoupler U2 and the control unit, and the other end of the first capacitor C9 is grounded;
one end of a third voltage-dividing resistor R10 is connected to the fourth pin 4 of the optocoupler U2, the other end of the third voltage-dividing resistor R10 is connected to one end of a second capacitor C12 and the cathode of a third diode D10, the other end of the second capacitor C12 is grounded, and the anode of the third diode D10 is connected to the same-name end of the transformer. Specifically, the third pin 3 is specifically a P _ DOWM port, and the second capacitor C12 is a 1uF ceramic capacitor, and has a small capacity, so that when the input voltage is powered off, the output P _ DOWM port level will immediately flip to a low level, and similarly, when the input voltage is powered on, the output P _ DOWM port level will immediately flip from a low level to a high level or a square wave signal, and the control unit can quickly respond by using the change, and can perform operations such as resetting or adjusting brightness and color temperature. When the output of the optocoupler U2 is turned on, the second voltage dividing resistor R11 and the third voltage dividing resistor R10 may divide the higher output voltage into voltages acceptable by the control unit, such as 5V, and the second zener diode ZD2 may select a 5.1V zener diode, so as to absorb the voltage spike, protect the control unit, and the first capacitor C9 may select a smaller capacity, so as to eliminate noise and interference, and prevent the control unit from false detection. When the first pin 1 and the second pin 2 of the optocoupler U2 are turned on, the third pin 3 and the fourth pin 4 are turned on, and the third pin 3, i.e., P _ down, can obtain a high level of 5V, and when the first pin 1 and the second pin 2 of the optocoupler U2 are turned off, the third pin 3 and the fourth pin 4 are not turned on, and then the third pin 3, i.e., P _ down, can obtain a low level of 0V.
A first pin 1 of the optical coupler U2 is connected with one ends of a first resistor R9 and a second resistor R8, the other end of the first resistor R9 is grounded, the other end of the second resistor R8 is connected with one end of a third capacitor C8 and the cathode of a second diode D9, and the other end of the third capacitor C8 is grounded; the anode of the second diode D9 is connected with a power supply. The first pin 1 of the optocoupler U2 is powered by the auxiliary winding of the main power supply through the processing of the second diode D9, the third capacitor C8 and the second resistor R8.
After the dc voltage is input to the voltage-reducing module and reduced by the first voltage-dividing resistor, the switching tube Q2 is controlled to be turned on, and the switching tube Q2 is turned on to turn on the light emitting diode, so that the phototriode is turned on and outputs a constant output voltage, and then the constant output voltage is divided by the second voltage-dividing resistor R11 and the third voltage-dividing resistor R10 to output a high level signal to the control unit. The parameters of the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the current limiting resistor R7 and the first zener diode ZD1 are set to ensure that the optocoupler U2 is conducted in the whole process. The alternating voltage is input into the voltage reduction module, half-wave rectification is performed through the first diode D8, then voltage reduction is performed through the first voltage dividing resistor, and then the switching tube Q2 is controlled to be conducted or not conducted, so that the light emitting diode is conducted or not conducted, and the conduction or not conduction of the phototriode is controlled, the conduction frequency of the optical coupler U2 is consistent with the frequency of the alternating voltage, and the phototriode outputs square wave signals with the same frequency to the control unit. Through the processing of the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the current limiting resistor R7 and the first zener diode ZD1, it can be ensured that the optocoupler U2 is turned on at a certain set voltage at the peak of the ac voltage, the optocoupler U2 is not turned on below the set voltage, and the frequency at which the optocoupler U2 is turned on is consistent with the frequency of the input ac voltage.
In this embodiment, when 50Hz ac power is input, the ac voltage is processed by the first diode D8, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the current-limiting resistor R7, and the first zener diode ZD1 at the front end of the optocoupler, and then the processed ac voltage becomes a lower current-limiting voltage, and the switch Q2 is controlled to turn on and off the switch, so that the output P _ DOWM will obtain a square wave voltage with a frequency of 50Hz and an amplitude of 5V. Similarly, when an AC voltage of 100Hz is input, the output will obtain a square wave voltage with frequency of 100Hz and amplitude of 5V. When the input is a DC high level voltage, the output will get a DC high level voltage with an amplitude of 5V. When the MCU obtains different signals, different responses can be made according to design requirements, and the requirements of energy conservation and multiple samples in customers and markets are met.
The invention provides an emergency detection and multi-input power supply lighting circuit which can quickly detect different input voltage characteristics so as to output waveform signals with different characteristics to a control unit, and the control unit outputs different duty ratios to control different brightness of a lighting load and achieve the purpose of energy conservation. The circuit can also realize the quick detection of the power failure of the mains supply, and meets the quick reset requirement of intelligent products. When the control unit obtains different signals, different responses can be made according to design requirements, and the requirements of energy conservation and multiple samples in customers and markets are met. The circuit is low in cost, high in response speed and high in reliability, and can be popularized as a basic circuit of an intelligent product.
The above description is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art can make insubstantial changes in the technical scope of the present invention within the technical scope of the present invention, and the actions infringe the protection scope of the present invention are included in the present invention.
Claims (10)
1. An emergency detection and multi-input power supply lighting circuit is characterized by comprising a voltage reduction module and an output voltage control module; the voltage reduction module is connected with a power input and the control output voltage module, the control output voltage module is connected with a control unit, and the control unit is connected with a lighting load; the voltage reduction module converts high alternating current or high direct current input by the power supply into low alternating current or low direct current and then transmits the low alternating current or low direct current to the control output voltage module; when direct current is input, the control output voltage module is conducted and outputs a certain voltage to the control unit; when alternating current is input, the control output voltage module is conducted according to the frequency of the alternating current and outputs a certain voltage to the control unit; the control unit outputs different duty ratios to control the lighting load according to the received alternating current signal or direct current signal; when the power supply input is powered off, the control output voltage module outputs a low level to the control unit.
2. The emergency detection and multiple-input power lighting circuit according to claim 1, wherein the voltage-reduction module further comprises a rectifying unit; when alternating current is input, the rectifying unit of the voltage reduction module rectifies the alternating current and then inputs the rectified alternating current into the voltage control output module.
3. The emergency detection and multiple-input power supply lighting circuit according to claim 2, wherein the control output voltage module specifically comprises an optocoupler; the input end of the optical coupler is connected with the voltage reduction module, and the output end of the optical coupler is connected with the control unit.
4. The emergency detection and multiple-input power supply lighting circuit according to claim 3, wherein a cathode of the light emitting diode of the optocoupler is connected to a switching tube, and an anode of the light emitting diode is connected to a power supply; one end of a phototriode of the optical coupler is connected with the control unit, and the other end of the phototriode is connected with a transformer.
5. The emergency detection and multiple-input power supply lighting circuit according to claim 4, wherein the power supply input reaches the switching tube through the voltage reduction module to control on/off of the switching tube, the switching tube is turned on, the optical coupler is turned on, the switching tube is turned off, the optical coupler is turned off, and one end of the phototriode connected to the control unit outputs a low level.
6. The emergency detection and multiple-input power lighting circuit according to claim 5, wherein the voltage-reducing module comprises a first voltage-dividing resistor, and the rectifying unit is a first diode; the positive electrode of the first diode is connected with an input power supply, the negative electrode of the first diode is connected with one end of the first divider resistor, the other end of the first divider resistor is connected with one end of a current-limiting resistor, the other end of the current-limiting resistor is connected with the negative electrode of the first voltage-stabilizing diode, the positive electrode of the first voltage-stabilizing diode is connected with the base electrode of the switch tube, the emitting electrode of the switch tube is grounded, and the collecting electrode of the switch tube is connected with the negative electrode of the light-emitting diode of the optical coupler.
7. The emergency detection and multiple-input power supply lighting circuit according to claim 6, wherein one end of a second voltage-dividing resistor is connected between one end of the photo-transistor of the optical coupler, which is connected with the control unit, and the other end of the second voltage-dividing resistor is grounded; the cathode of the second voltage stabilizing diode is connected between one end of the phototriode of the optical coupler, which is connected with the control unit, and the anode of the second voltage stabilizing diode is grounded; one end of the first capacitor is connected between one end of the phototriode of the optical coupler, which is connected with the control unit, and the other end of the first capacitor is grounded;
one end of a third voltage-dividing resistor is connected with one end of a phototriode of the optical coupler, which is connected with one end of a transformer, the other end of the third voltage-dividing resistor is connected with one end of a second capacitor and the cathode of a third diode, the other end of the second capacitor is grounded, and the anode of the third diode is connected with the end of the transformer with the same name.
8. The emergency detection and multiple-input power supply lighting circuit according to claim 7, wherein an anode of the light emitting diode of the optocoupler is connected to one end of a first resistor and one end of a second resistor, the other end of the first resistor is grounded, the other end of the second resistor is connected to one end of a third capacitor and a cathode of the second diode, and the other end of the third capacitor is grounded; and the anode of the second diode is connected with a power supply.
9. The emergency detection and multiple-input power lighting circuit according to claim 8, wherein the dc voltage is input to the voltage dropping module and dropped by the first voltage dividing resistor, and then the switching tube is turned on, and the switching tube is turned on to turn on the light emitting diode, so that the photo transistor is turned on and outputs a constant output voltage, and then the constant output voltage is divided by the second voltage dividing resistor and the third voltage dividing resistor, and then a high level signal is output to the control unit.
10. The emergency detection and multiple-input power lighting circuit according to claim 8, wherein the ac voltage is input to the voltage-reducing module, half-wave rectified through the first diode, then reduced through the first voltage-dividing resistor, and then the switching tube is controlled to be turned on or off, so that the light emitting diode is turned on or off, thereby controlling the phototriode to be turned on or off, so that the frequency of the conduction of the optical coupler is consistent with the frequency of the ac voltage, and the phototriode outputs a square wave signal with the same frequency to the control unit.
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| CN201911159276.3A CN110958749A (en) | 2019-11-22 | 2019-11-22 | Emergency detection and multi-input power supply lighting circuit |
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| CN201911159276.3A CN110958749A (en) | 2019-11-22 | 2019-11-22 | Emergency detection and multi-input power supply lighting circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101720154A (en) * | 2009-12-15 | 2010-06-02 | 海洋王照明科技股份有限公司 | Emergency power supply switching circuit and LED drive circuit thereof |
| US9198249B1 (en) * | 2014-06-19 | 2015-11-24 | Habitex Corporation | Lighting system including a driving device for driving a lighting appliance |
| CN207219090U (en) * | 2017-06-22 | 2018-04-10 | 中山市智观照明科技有限公司 | A kind of wide electronic light modulator of compatible voltage range |
| CN211240183U (en) * | 2019-11-22 | 2020-08-11 | 厦门阳光恩耐照明有限公司 | Emergency detection and multi-input power supply lighting circuit |
-
2019
- 2019-11-22 CN CN201911159276.3A patent/CN110958749A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101720154A (en) * | 2009-12-15 | 2010-06-02 | 海洋王照明科技股份有限公司 | Emergency power supply switching circuit and LED drive circuit thereof |
| US9198249B1 (en) * | 2014-06-19 | 2015-11-24 | Habitex Corporation | Lighting system including a driving device for driving a lighting appliance |
| CN207219090U (en) * | 2017-06-22 | 2018-04-10 | 中山市智观照明科技有限公司 | A kind of wide electronic light modulator of compatible voltage range |
| CN211240183U (en) * | 2019-11-22 | 2020-08-11 | 厦门阳光恩耐照明有限公司 | Emergency detection and multi-input power supply lighting circuit |
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