CN107820344B - Emergency module - Google Patents
Emergency module Download PDFInfo
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- CN107820344B CN107820344B CN201711019878.XA CN201711019878A CN107820344B CN 107820344 B CN107820344 B CN 107820344B CN 201711019878 A CN201711019878 A CN 201711019878A CN 107820344 B CN107820344 B CN 107820344B
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 31
- 101001128814 Pandinus imperator Pandinin-1 Proteins 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 101001024685 Pandinus imperator Pandinin-2 Proteins 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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]
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Abstract
The invention provides an emergency module, which comprises a constant voltage module, a constant current module, a first comparator and a second comparator; the power supply device sends a high level to the constant voltage module, the basic signal of the constant voltage module is compared with the comparison signal of the first comparator, and an electric signal is sent to control the conversion ratio of the input voltage and the output voltage provided by the power supply device to be converted, so that the value of the output voltage reaches a preset constant voltage value; the basic signal of the constant current module is compared with the comparison signal of the second comparator and an electric signal is sent out to control the input current so that the input current is constant; the constant output voltage enters the constant current module, and the input current of the constant current module is constant, so that the input power of the constant current module is constant, namely the output power of the constant current module is constant. By the technical scheme, the problem of single load of the LED module can be solved, limited resources are fully utilized, and energy conservation is realized.
Description
Technical Field
The invention relates to the field of emergency illumination, in particular to an emergency module.
Background
LED applications are becoming more and more widespread, as are LED fixtures for everyday indoor and outdoor lighting. In the circuit of the LED lamp, although the power consumption of the LED is not large, the necessary current and voltage of the power supply provided by the LED lamp are required to be kept relatively stable within a certain range, and meanwhile, the LED lamp is required to have a certain overcurrent and overvoltage protection function.
Many powered devices are equipped with a backup emergency power supply so that the powered device can continue to operate on the backup power when the external power supply is lost. Emergency lighting fixtures are required in many aspects of life, for example: corridor stairs, warehouse.
In the prior art, such emergency modules are generally set to constant current output, which can cause the output voltage range to be limited, and then the connected load is also limited. If the number of loads or the serial-parallel connection mode is changed, a new power supply needs to be developed again, which easily causes resource waste and is not beneficial to environmental protection.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides an emergency module, which solves the problem of single load of an LED module by setting constant power so as to avoid the limitation of an output voltage range, fully utilizes limited resources and saves energy.
In order to solve the technical problems, the invention provides an emergency module, which comprises a constant voltage module, a constant current module, a first comparator and a second comparator; the constant voltage module is connected between a power supply and the first comparator; the constant current module is connected between the constant voltage module and the second comparator;
The power supply device sends a high level to the constant voltage module, the basic signal of the constant voltage module is compared with the comparison signal of the first comparator and sends an electric signal to control the conversion ratio of the input voltage and the output voltage provided by the power supply device to change, so that the value of the output voltage reaches a preset constant voltage value;
The basic signal of the constant current module is compared with the comparison signal of the second comparator and an electric signal is sent out to control the input current so that the input current is constant;
One end of the output voltage is an output voltage end, the output voltage end is connected with the constant current module, the constant output voltage enters the constant current module, and the input current, the power and the output power of the constant current module are constant;
The constant current module is connected with a charging device, and the charging device is connected with a load so as to adjust output voltage and current according to voltage required by the load.
In a preferred embodiment, the first comparator is connected to the output voltage terminal; when the output voltage changes, the voltage of the first comparator synchronously changes; the comparison signal of the constant voltage device is specifically a first reference voltage value, and the comparison signal of the first comparator is specifically a voltage value of the first comparator; the constant voltage module sends an electric signal to control conversion of the conversion ratio of the input voltage and the output voltage through the comparison result of the reference voltage and the voltage of the first comparator.
In a preferred embodiment, the constant voltage module is specifically a first chip U5; the first port Pin3 of the first chip U5 is connected with the power supply; the second port Pin5 of the first chip U5 transmits an electric signal for controlling the conversion ratio of the input voltage to the output voltage; the third port Pin2 of the first chip U5 is provided with a first reference voltage and is connected to the first comparator.
In a preferred embodiment, the second port Pin5 is connected between the power supply and the output voltage terminal; the conversion ratio of the input voltage to the output voltage is 1-D1, D1 is the on duty ratio of the first chip U5; the second port Pin5 sends signals with different duty ratios to change the conversion ratio of the input voltage to the output voltage; the conversion formula of the input voltage and the output voltage is
VO＝VIN/(1-D1)
Wherein V O is the output voltage and V IN is the input voltage.
In a preferred embodiment, a first switch is disposed between the second port Pin5 and the output voltage terminal; the input voltage is converted into output voltage through the conversion ratio of the input voltage and the output voltage;
If the value of the output voltage reaches the value of the preset voltage, the first switch is opened, and the output voltage end outputs the voltage; if the value of the output voltage does not reach the preset voltage value, the first switch is closed, and the output voltage end does not output voltage.
In a preferred embodiment, the first comparator is embodied as a first comparing resistor R36; the first switch is specifically a first diode D9;
When the output voltage is lower than a preset voltage value, the voltage value on the first comparison resistor R36 is smaller than a first reference voltage value, the first diode D9 is not conducted, and no voltage is output at the output voltage end; the second port Pin5 outputs the on duty ratio D1 to be increased to a certain value, so that the output voltage reaches a preset voltage value through a conversion formula;
When the output voltage is equal to a preset voltage value, the voltage value of the first comparison resistor R36 is equal to a first reference voltage value, the first diode D9 is conducted, and the output voltage end outputs the preset voltage value;
When the output voltage is higher than a preset voltage value, the voltage value on the first comparison voltage is larger than a first reference voltage value, and the output on-duty ratio D of the second port Pin5 is reduced to a certain value, so that the output voltage reaches the preset voltage value through a conversion formula.
In a preferred embodiment, the constant current module is a second chip U6; the input current flows into the input current end; the fourth port Pin1 of the second chip U6 is connected with the output voltage end and the input current end and is used for sending a duty ratio signal to control the input current; the second comparator is connected between the output voltage end and the input current end; the basic signal of the constant current module is specifically a second reference voltage value; the fifth port Pin6 of the second chip U6 is provided with a second reference voltage and is connected to the second comparator.
In a preferred embodiment, the second comparator is a parallel resistor comparing device formed by connecting two resistors R37 and R38 in parallel; the output voltage end inputs a preset voltage value to the second chip U6, input current flows into the parallel resistor comparison device, and voltage difference formed between the two parallel resistors R37 and R38 is comparison information of the second comparator and is compared with a second reference voltage value;
When the voltage difference formed between the two parallel resistors R37 and R38 is smaller than the second reference voltage value, the duty ratio signal D2 sent by the fourth port Pin1 is increased to a certain value, so that the input current reaches a preset current value;
When the voltage difference between the two parallel resistors R37 and R38 is greater than the second reference voltage value, the duty ratio signal D2 sent by the fourth port Pin1 is reduced to a certain value, so that the input current reaches the preset current value.
In a preferred embodiment, the device further comprises an overvoltage protection module; the overvoltage protection module comprises a second switch and a third switch; the second switch is connected between the input current end and the third switch, and the third switch is connected between the second switch and a sixth port Pin4 of the second chip U6; when the output voltage is too high, the second switch is turned on, the third switch is turned on, the level signal of the sixth port Pin4 is pulled down, and the output voltage is reduced.
In a preferred embodiment, the second switch is a zener diode ZD1, and the third switch is a transistor Q7; the negative electrode of the voltage stabilizing diode ZD1 is connected with an input current end, and the positive electrode of the voltage stabilizing diode ZD1 is connected with the base electrode of the triode Q7; the collector electrode of the triode Q7 is connected with a sixth port Pin4; when the output voltage is too high, the zener diode ZD1 is broken down and turned on, the base electrode of the triode Q7 receives the high level signal and turned on, the sixth port Pin4 level signal is pulled down, and the fourth port Pin1 stops outputting the duty ratio signal D2, so that the output voltage is reduced.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
The design scheme ensures the constant input power by setting the constant voltage and current, and determines the constant output power due to the constant efficiency of the same chip. In the actual use process of the emergency module, if the number of the loads is adjusted or the serial-parallel connection mode of the loads is adjusted, the output voltage of the emergency module is changed. The power supply module is suitable for multiple types of loads, limited resources are fully utilized, and energy conservation and reasonable resource utilization are realized. An overvoltage protection module is arranged to ensure that a circuit is not damaged due to overlarge output voltage.
Drawings
Fig. 1 is a schematic diagram of a constant voltage section circuit in a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of a constant current section circuit in a preferred embodiment of the invention;
FIG. 3 is a schematic view showing the appearance of a product according to a preferred embodiment of the present invention.
The constant voltage module 1, the first comparator 2, the first switch 3, the constant current module 4, the second comparator 5, the second switch 6, the third switch 7, the light-transmitting cover 8, the main body 9, the light-emitting module 10 and the emergency module 11.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
An emergency module comprises a constant voltage module, a constant current module, a first comparator and a second comparator; the constant voltage module is connected between a power supply and the first comparator; the constant current module is connected between the constant voltage module and the second comparator;
The power supply device sends a high level to the constant voltage module, the basic signal of the constant voltage module is compared with the comparison signal of the first comparator and sends an electric signal to control the conversion ratio of the input voltage and the output voltage provided by the power supply device to change, so that the value of the output voltage reaches a preset constant voltage value;
The basic signal of the constant current module is compared with the comparison signal of the second comparator and an electric signal is sent out to control the input current so that the input current is constant;
One end of the output voltage is an output voltage end, the output voltage end is connected with the constant current module, the constant output voltage enters the constant current module, and the input current, the power and the output power of the constant current module are constant;
The constant current module is connected with a charging device, and the charging device is connected with a load so as to adjust output voltage and current according to voltage required by the load.
The first comparator is connected with an output voltage end; when the output voltage changes, the voltage of the first comparator synchronously changes; the comparison signal of the constant voltage device is specifically a first reference voltage value, and the comparison signal of the first comparator is specifically a voltage value of the first comparator; the constant voltage module sends an electric signal to control conversion of the conversion ratio of the input voltage and the output voltage through the comparison result of the reference voltage and the voltage of the first comparator.
Referring to fig. 1 and 3, the constant voltage module 1 is specifically a first chip U5; the first port Pin3 of the first chip U5 is connected with the power supply; the second port Pin5 of the first chip U5 transmits an electric signal for controlling the conversion ratio of the input voltage to the output voltage; the third port Pin2 of the first chip U5 is provided with a first reference voltage and is connected to the first comparator 2.
The second port Pin5 is connected between the power supply and the output voltage end; the conversion ratio of the input voltage to the output voltage is 1-D1, D1 is the on duty ratio of the first chip U5; the second port Pin5 sends signals with different duty ratios to change the conversion ratio of the input voltage to the output voltage; the conversion formula of the input voltage and the output voltage is
VO＝VIN/(1-D1)
Wherein V O is the output voltage and V IN is the input voltage.
A first switch 3 is arranged between the second port Pin5 and the output voltage end; the input voltage is converted into output voltage through the conversion ratio of the input voltage and the output voltage;
If the value of the output voltage reaches the value of the preset voltage, the first switch 3 is opened, and the output voltage end outputs the voltage; if the value of the output voltage does not reach the preset voltage value, the first switch 3 is turned off, and no voltage is output from the output voltage terminal.
The first comparator 2 is specifically a first comparison resistor R36; the first switch 3 is specifically a first diode D9;
When the output voltage is lower than a preset voltage value, the voltage value on the first comparison resistor R36 is smaller than a first reference voltage value, the first diode D9 is not conducted, and no voltage is output at the output voltage end; the second port Pin5 outputs the on duty ratio D1 to be increased to a certain value, so that the output voltage reaches a preset voltage value through a conversion formula;
When the output voltage is equal to a preset voltage value, the voltage value of the first comparison resistor R36 is equal to a first reference voltage value, the first diode D9 is conducted, and the output voltage end outputs the preset voltage value;
when the output voltage is higher than a preset voltage value, the voltage value on the first comparison voltage is larger than a first reference voltage value, the output on-duty ratio D of the second port Pin5 is reduced to a certain value, the output voltage reaches the preset voltage value, namely +6V, through a conversion formula, and the constant current module is supplied with power through an output voltage end.
Referring to fig. 2, the constant current module 4 is a second chip U6; the input current flows into the input current end; the fourth port Pin1 of the second chip U6 is connected with the output voltage end and the input current end and is used for sending a duty ratio signal to control the input current; the second comparator 5 is connected between an output voltage end and an input current end; the basic signal of the constant current module 4 is specifically a second reference voltage value; the fifth port Pin6 of the second chip U6 is provided with a second reference voltage and is connected to the second comparator.
The second comparator 5 is a parallel resistance comparison device formed by connecting two resistors R37 and R38 in parallel; the output voltage end inputs a preset voltage value to the second chip U6, input current flows into the parallel resistor comparison device, and voltage difference formed between the two parallel resistors R37 and R38 is comparison information of the second comparator 5 and is compared with a second reference voltage value;
When the voltage difference formed between the two parallel resistors R37 and R38 is smaller than the second reference voltage value, the duty ratio signal D2 sent by the fourth port Pin1 is increased to a certain value, so that the input current reaches a preset current value;
When the voltage difference between the two parallel resistors R37 and R38 is greater than the second reference voltage value, the duty ratio signal D2 sent by the fourth port Pin1 is reduced to a certain value, so that the input current reaches the preset current value.
The output voltage end outputs constant voltage to the second chip U6, and constant current is input to the second chip, so that input power is constant; the output power is constant because the efficiency of the same chip is the same. When the fourth port Pin1 sends out a high level signal, the inductor L3 starts to store energy; when the fourth port Pin1 emits a low level signal, the inductor L3 starts to discharge. Therefore, the inductance L3 after energy storage can meet the load requirement in a certain range, and the emergency module 11 provided by the invention can provide voltage in a voltage range of +6V to +55V. The power supply module is suitable for multiple types of loads, limited resources are fully utilized, and energy conservation and reasonable resource utilization are realized.
In order to protect the circuit from being damaged due to the voltage, the emergency module 11 provided by the invention further comprises an overvoltage protection module; the overvoltage protection module comprises a second switch 6 and a third switch 7; the second switch 6 is connected between an input current end and the third switch 7, and the third switch 7 is connected between the second switch 6 and a sixth port Pin4 of the second chip U6; when the output voltage is too high, the second switch 6 is turned on, the third switch 7 is turned on, the level signal of the sixth port Pin4 is pulled down, and the output voltage is reduced.
The second switch 6 is specifically a zener diode ZD1, and the third switch 7 is a triode Q7; the negative electrode of the voltage stabilizing diode ZD1 is connected with an input current end, and the positive electrode of the voltage stabilizing diode ZD1 is connected with the base electrode of the triode Q7; the collector electrode of the triode Q7 is connected with a sixth port Pin4; when the output voltage is too high, the zener diode ZD1 is broken down and turned on, the base electrode of the triode Q7 receives the high level signal and turned on, the sixth port Pin4 level signal is pulled down, and the fourth port Pin1 stops outputting the duty ratio signal D2, so that the output voltage is reduced.
Referring to fig. 3, the preferred embodiment of the emergency module 11 forms an external schematic view of a structural product, which is an exploded perspective schematic view of an embodiment of a lamp. The lamp comprises a light-transmitting cover 8, a main body 9, a light-emitting module 10 and an emergency module 11, wherein the light-transmitting cover 8 and the main body 9 are combined with each other, and the light-emitting module 10 and the emergency module 11 are electrically connected with each other and are arranged in the main body 9.
The foregoing 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 will be able to make insubstantial modifications of the present invention within the scope of the present invention disclosed herein by this concept, which falls within the actions of invading the protection scope of the present invention.
Claims (7)
1. The emergency module is characterized by comprising a constant voltage module, a constant current module, a first comparator and a second comparator; the constant voltage module is connected between a power supply and the first comparator; the constant current module is connected between the constant voltage module and the second comparator; the power supply device sends a high level to the constant voltage module, the basic signal of the constant voltage module is compared with the comparison signal of the first comparator and sends an electric signal to control the conversion ratio of the input voltage and the output voltage provided by the power supply device to change, so that the value of the output voltage reaches a preset constant voltage value; the basic signal of the constant current module is compared with the comparison signal of the second comparator and an electric signal is sent out to control the input current so that the input current is constant; one end of the output voltage is an output voltage end, the output voltage end is connected with the constant current module, the constant output voltage enters the constant current module, and the input current, the power and the output power of the constant current module are constant; the constant current module is connected with a charging device, and the charging device is connected with a load so as to adjust output voltage and current according to voltage required by the load; the constant voltage module is specifically a first chip U5; the first port Pin3 of the first chip U5 is connected with the power supply; the second port Pin5 of the first chip U5 transmits an electric signal for controlling the conversion ratio of the input voltage to the output voltage; the third port Pin2 of the first chip U5 is provided with a first reference voltage and is connected with the first comparator; the second port Pin5 is connected between the power supply and the output voltage end; the conversion ratio of the input voltage to the output voltage is 1-D1, D1 is the on duty ratio of the first chip U5; the second port Pin5 sends signals with different duty ratios to change the conversion ratio of the input voltage to the output voltage; the conversion formula of the input voltage and the output voltage is V O ＝V IN /(1-D1), wherein V O is the output voltage and V IN is the input voltage; the constant current module is a second chip U6; the input current flows into the input current end; the fourth port Pin1 of the second chip U6 is connected with the output voltage end and the input current end and is used for sending a duty ratio signal to control the input current; the second comparator is connected between the output voltage end and the input current end; the basic signal of the constant current module is specifically a second reference voltage value; the fifth port Pin6 of the second chip U6 is provided with a second reference voltage and is connected to the second comparator.
2. The emergency module of claim 1, wherein the first comparator is connected to an output voltage terminal; when the output voltage changes, the voltage of the first comparator synchronously changes; the comparison signal of the constant voltage module is specifically a first reference voltage value, and the comparison signal of the first comparator is specifically a voltage value of the first comparator; the constant voltage module sends an electric signal to control conversion of the conversion ratio of the input voltage and the output voltage according to the comparison result of the first reference voltage value and the voltage value of the first comparator.
3. The emergency module of claim 1, wherein a first switch is disposed between the second port Pin5 and the output voltage terminal; the input voltage is converted into output voltage through the conversion ratio of the input voltage and the output voltage; if the value of the output voltage reaches the value of the preset voltage, the first switch is opened, and the output voltage end outputs the voltage; if the value of the output voltage does not reach the preset voltage value, the first switch is closed, and the output voltage end does not output voltage.
4. An emergency module according to claim 3, wherein the first comparator is embodied as a first comparison resistor R36; the first switch is specifically a first diode D9; when the output voltage is lower than a preset voltage value, the voltage value on the first comparison resistor R36 is smaller than a first reference voltage value, the first diode D9 is not conducted, and no voltage is output at the output voltage end; the second port Pin5 outputs the on duty ratio D1 to be increased to a certain value, so that the output voltage reaches a preset voltage value through a conversion formula; when the output voltage is equal to a preset voltage value, the voltage value of the first comparison resistor R36 is equal to a first reference voltage value, the first diode D9 is conducted, and the output voltage end outputs the preset voltage value; when the output voltage is higher than a preset voltage value, the voltage value on the first comparison voltage is larger than a first reference voltage value, and the output on-duty ratio D of the second port Pin5 is reduced to a certain value, so that the output voltage reaches the preset voltage value through a conversion formula.
5. The emergency module according to claim 1, wherein the second comparator is a parallel resistor comparing device formed by connecting two resistors R37 and R38 in parallel; the output voltage end inputs a preset voltage value to the second chip U6, input current flows into the parallel resistor comparison device, and voltage difference formed between the two parallel resistors R37 and R38 is comparison information of the second comparator and is compared with a second reference voltage value; when the voltage difference formed between the two parallel resistors R37 and R38 is smaller than the second reference voltage value, the duty ratio signal D2 sent by the fourth port Pin1 is increased to a certain value, so that the input current reaches a preset current value; when the voltage difference between the two parallel resistors R37 and R38 is greater than the second reference voltage value, the duty ratio signal D2 sent by the fourth port Pin1 is reduced to a certain value, so that the input current reaches the preset current value.
6. The emergency module of claim 5, further comprising an overvoltage protection module; the overvoltage protection module comprises a second switch and a third switch; the second switch is connected between the input current end and the third switch, and the third switch is connected between the second switch and a sixth port Pin4 of the second chip U6; when the output voltage is too high, the second switch is turned on, the third switch is turned on, the level signal of the sixth port Pin4 is pulled down, and the output voltage is reduced.
7. The emergency module according to claim 6, wherein the second switch is a zener diode ZD1 and the third switch is a transistor Q7; the negative electrode of the voltage stabilizing diode ZD1 is connected with an input current end, and the positive electrode of the voltage stabilizing diode ZD1 is connected with the base electrode of the triode Q7; the collector electrode of the triode Q7 is connected with a sixth port Pin4; when the output voltage is too high, the zener diode ZD1 is broken down and turned on, the base electrode of the triode Q7 receives the high level signal and turned on, the sixth port Pin4 level signal is pulled down, and the fourth port Pin1 stops outputting the duty ratio signal D2, so that the output voltage is reduced.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711019878.XA CN107820344B (en) | 2017-10-27 | 2017-10-27 | Emergency module |
| DE202018100405.0U DE202018100405U1 (en) | 2017-10-27 | 2018-01-24 | emergency module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711019878.XA CN107820344B (en) | 2017-10-27 | 2017-10-27 | Emergency module |
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| CN107820344A CN107820344A (en) | 2018-03-20 |
| CN107820344B true CN107820344B (en) | 2024-04-23 |
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| CN201711019878.XA Active CN107820344B (en) | 2017-10-27 | 2017-10-27 | Emergency module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20120056162A (en) * | 2010-11-24 | 2012-06-01 | 삼성엘이디 주식회사 | Led driving apparatus |
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| JPS57196623A (en) * | 1981-05-28 | 1982-12-02 | Toshiba Corp | Output controlling circuit |
| CN102186289A (en) * | 2011-04-18 | 2011-09-14 | 广东科立盈光电技术有限公司 | LED (Light Emitting Diode) driving power supply |
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| CN107820344A (en) | 2018-03-20 |
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