CN213602569U - Internet of things power supply capable of being controlled by power supply pulse - Google Patents
Internet of things power supply capable of being controlled by power supply pulse Download PDFInfo
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- CN213602569U CN213602569U CN202022194707.4U CN202022194707U CN213602569U CN 213602569 U CN213602569 U CN 213602569U CN 202022194707 U CN202022194707 U CN 202022194707U CN 213602569 U CN213602569 U CN 213602569U
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Abstract
The utility model provides a thing networking power of available power supply pulse control relates to LED lamps and lanterns constant voltage constant current power supply field, especially the LED power of adjusting luminance of built-in thing networking wireless control module. The power-off control device comprises a switch power circuit, a detection sampling module, a photoelectric isolation module and a switch control module are additionally arranged, the sampling module detects the frequency of power-off of external alternating current, the frequency is controlled, DC power supply power-off of the wireless control module of the Internet of things is rapidly controlled after photoelectric isolation is carried out, and a power supply pulse signal is transmitted to the wireless control module of the Internet of things, so that the module enters different states, the problem that the wireless module cannot detect the power-off state due to long-time discharging of an internal capacitor of the switch power is solved, in addition, the power-off delay time is adjusted through the capacitor capacity at the front end of the photoelectric isolation module, and the power-off time control requirements of the Internet of things modules of different manufacturers.
Description
Technical Field
The utility model relates to a LED lamps and lanterns constant voltage constant current power supply field, especially intelligent LED dimming power supply of built-in wireless thing networking module.
Background
The development of current internet of things, more and more producers provide the LED intelligent power of built-in wireless internet of things module, through the wireless control module of switching power supply built-in thing networking, realizes adjusting luminance of LED lamps and lanterns, mixing of colors to and regularly wait intelligent lighting's function. This kind of thing networking power need not to lay the control line, can utilize bluetooth or WIFI to realize intelligent grouping setting, functions such as dimming control through APP at high in the clouds network deployment, and is very simple and convenient.
However, when the intelligent power supplies are usually paired, an on-off signal of an alternating current power supply is required to be transmitted to the built-in internet of things module, the internet of things wireless control module senses the frequency of power failure, and enters different states of the intelligent power supplies, for example, the intelligent power supplies are powered on after power failure in a short time, the color temperature of the LED lamp is switched by the internet of things module, the intelligent power supplies are powered on for 3 times after power failure in a short time, and the internet of things wireless intelligent module automatically enters a pairing state.
Because the existing switching power supply has a large filter capacitor inside, so that the smooth output of a power supply is realized, after the external power supply is powered off, the capacitor can continuously discharge for the direct-current voltage stabilizing circuit of the wireless control module of the internet of things, so that the wireless control module of the internet of things maintains the power supply, the signal of the rapid and repeated on-off of the external power supply cannot be detected, and the state change of the intelligent power supply cannot be controlled through a power supply pulse signal.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an available power impulse control's thing networking power.
An Internet of things power supply capable of being controlled by power supply pulses comprises a rectification circuit, a filter circuit, a power conversion circuit, an output shaping filter circuit, a sampling voltage stabilization control circuit of a switch power supply, a direct current voltage stabilizing circuit for supplying power to a wireless control module and the wireless control module, and also comprises an Internet of things power supply capable of being controlled by power supply pulses,
the detection sampling module is used for detecting whether the alternating current power supply circuit is electrified or not, and the output end of the detection sampling module is connected with the input end of the photoelectric isolation module to transmit a detection signal to the photoelectric isolation module;
the output end of the photoelectric isolation module is connected with the input pin of the switch control module and is used for transmitting the state signal of the alternating current power supply circuit to the switch control module after photoelectric isolation;
the switch control module is connected to a power supply input end of a direct current voltage stabilizing circuit for supplying power to the wireless control module, and after the alternating current power supply circuit is powered off, the direct current voltage stabilizing circuit is quickly switched off by the switch control module within the time less than T1, so that the power supply of the wireless control module is cut off.
Due to the fact that the independent power supply control circuit is adopted, the influence of long discharging time of a large filter capacitor inside an original switch power supply is avoided, the wireless control module can be powered off rapidly, the power on-off state of the power supply is transmitted to the wireless control module, the built-in program of the wireless module controls output change according to a power supply switch signal, and therefore the power supply state change is controlled through the power supply pulse signal.
The detection sampling module of an embodiment is a rectification full bridge, a direct current output end of the rectification full bridge is connected to an input end of a resistor, an output end of the resistor is connected to an input end of the photoelectric isolation module, the output end of the resistor is simultaneously connected to a capacitor, the other end of the capacitor is grounded, the resistor and the capacitor are connected in series to form an RC charge-discharge circuit, and the capacity of the capacitor is less than 20UF.
The switch control module of one embodiment comprises two stages of amplifying transistors, a base stage of a first stage of transistor is connected with an output end of the photoelectric isolation module, a collector electrode of a second stage of transistor and a transmitter stage are connected in series in a power supply loop of the direct current voltage stabilizing circuit, and the second stage of transistor is cut off to cut off the direct current voltage stabilizing circuit from an input power supply end.
The direct current voltage stabilizing circuit of one embodiment is a linear three-terminal linear voltage stabilizer, a capacitor is connected between the input end of the three-terminal linear voltage stabilizer and the ground in parallel, the capacity of the capacitor is less than 100UF, and the positive end of the output of the direct current voltage stabilizing circuit is connected to the positive end of the power supply of the wireless control module.
The optoelectronic isolation module of an embodiment comprises a photoelectric coupler, wherein an emitter of an output end of the photoelectric coupler is grounded, and a collector of the photoelectric coupler is connected to a VCC power supply end of a direct current voltage stabilizing circuit through a resistor.
An output pin of the wireless control module, which outputs the PWM control signal, is connected to a dimming signal input terminal of the rear-stage constant current control chip, which is in a model of FP7125, and an output terminal of the constant current control chip is connected to an LED light source.
It is thus clear that the rectification full-bridge can be with during the on-off positive and negative half cycle signal transmission of alternating current to the optoelectronic isolation module, the RC charge-discharge circuit of optoelectronic isolation module front end decides T1 time through the different parameters of electric capacity, satisfy different wireless control module's requirement to the time, linear three-terminal linear voltage regulator can provide direct current supply simply steadily, photoelectric coupler realizes electrical isolation well, wireless control module output pin is connected with the constant current chip, can control the state change of LED light source, thereby can be when the alternating current on-off power, it is simple, it is reliable, control wireless module power on-off fast, make wireless module output different signals, control LED light source state change.
Drawings
FIG. 1 is a block diagram of the operation of an embodiment.
FIG. 2 is a schematic diagram of a power supply and control circuit according to an embodiment.
Fig. 3 is a schematic circuit diagram of a constant current dimming part of an LED according to an embodiment.
Fig. 4 is a schematic circuit diagram of another embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
As shown in fig. 1: the first embodiment of the internet of things power supply capable of being controlled by power supply pulses comprises a rectifying circuit 100, a filter circuit 200, a power conversion circuit 300, an output shaping filter circuit 400, a sampling voltage stabilizing control circuit 500, a sampling detection module 600, a photoelectric isolation module 700, a switch control module 800, a direct current voltage stabilizing circuit 900 and a wireless control module 980.
Fig. 2 and fig. 3 form a schematic diagram of a complete circuit of an embodiment, and it can be seen from fig. 2 that the rectifier circuit 100 of the switching power supply is formed by a rectifier full bridge, the output end of the rectifier full bridge is connected with the filter circuit 200, the high-capacity electrolytic capacitor C1 is arranged in the rectifier full bridge, the output end of the filter circuit 200 is connected with the power conversion circuit 300, the output end of the filter circuit is connected with the output shaping filter circuit 400, and the high-capacity electrolytic capacitor C14 is also arranged in the rectifier full. The sampling voltage stabilization control circuit 500 samples the output voltage VCC, feeds back the output voltage VCC to the switching power supply chip U1, and stabilizes the output voltage through the control of U1.
Due to the action of the large-capacity capacitors C1 and C14 in the circuit, the VCC voltage at the power supply end of the output dc voltage stabilizing circuit 900 cannot change suddenly, and after the ac power supply end is powered off, the dc voltage stabilizing circuit 900 can still supply power to the wireless control module 980 in fig. 3 for a while, which results in that the on-off electric pulse of the ac power supply circuit cannot be detected.
In this embodiment, the sampling detection module 600 is added, and includes a rectifying full bridge DB2 and a resistor R11, the output terminal of the resistor R11 is connected to a capacitor C11, and the output terminal of the capacitor C11 is connected to the optoelectronic isolation module 700 through a resistor R14
The resistor and the capacitor form an RC charge-discharge circuit, the full charge time T1 of the capacitor depends on the parameters of the resistor and the capacitor, and the time T1 can be changed by changing the parameters of the resistor and the capacitor C11, so that the requirements of different control modules on power-off time are met.
The capacitor C11 in this embodiment has a capacity of 3.3UF, which is less than 20UF.
One end of the output end of the photoelectric isolation module is grounded, one end of the output end of the photoelectric isolation module is connected to the base of a first transistor Q2 of the switch control module 800 through a resistor R12 and is transmitted to the base of a second transistor Q3 through a pull-up resistor R13, the emitter of the transistor Q3 is connected to the output power supply VCC end of the sampling voltage stabilization control circuit 500, and the collector output end of the transistor Q3 is connected to the power supply input end of the direct current voltage stabilizing circuit 900.
The dc voltage regulator 900 includes a three-terminal linear regulator U82, an input capacitor C12, an output capacitor C13, a capacitor C12 connected between the input terminal of the dc regulator and ground, and the capacitor C12 has a capacitance of less than 100UF, 10UF in this embodiment.
In fig. 3, the power supply end of the wireless control module 980 is connected to the output end V5V of the dc voltage stabilizing circuit 900, the signal output pin of the wireless control module 980 outputs a PWM control signal, and is connected to the dimming signal DIM input end of the rear-stage constant current control chip, the model of the constant current control chip is FP7125, and the output end of the constant current control chip is connected to an LED light source. In this embodiment, the wireless control module outputs CW and RW 2 paths of PWM signals, and accesses two paths of constant current chips to control the LED light sources with cool and warm color temperatures, respectively.
Figure 4 is a circuit schematic of another embodiment,
the circuit comprises a rectifying circuit 100, a filter circuit 200, a power conversion circuit 300, an output shaping filter circuit 400, a sampling voltage stabilization control circuit 500, a sampling detection module 601, a photoelectric isolation module 700, a switch control module 801, a direct current voltage stabilizing circuit 901 and a wireless control module 982.
The rectifying circuit 100 of the switching power supply is composed of a rectifying full bridge, the output end of the rectifying full bridge is connected with a filter circuit 200, a high-capacity electrolytic capacitor C1 is arranged in the rectifying full bridge, the output end of the filter circuit 200 is connected with a power conversion circuit 300, the output end of the filter circuit is connected with an output shaping filter circuit 400, and the high-capacity electrolytic capacitor filter C14 is arranged in the rectifying full bridge for smooth output. The sampling voltage stabilization control circuit 500 samples the output voltage and stabilizes the output voltage by the switching power supply chip U1.
The sampling detection module 601 has a rectifying full bridge DB2 and a resistor R11, the output terminal of the resistor R11 is connected to a capacitor C11, and the output terminal of the capacitor C11 is connected to the input terminal of the photo-isolation module 700.
The resistor and the capacitor form an RC charge-discharge circuit, the full charge time T1 of the capacitor depends on the parameters of the resistor and the capacitor, and the time T1 can be changed by changing the parameters of the resistor and the capacitor C11, so that the requirements of different control modules on power-off time are met.
The capacitor C11 in this embodiment has a capacity of 3.3UF, which is less than 20UF.
One end of the output end of the photoelectric isolation module is grounded, and the other end is connected to the base of the transistor Q2 of the switch control module 801 through the resistor R12, the base is further connected with the pull-up resistor R13, the emitter of the transistor Q2 is connected to the output power supply VCC end of the sampling voltage stabilization control circuit 500, and the collector output end of the transistor Q2 is connected to the power supply input end of the direct current voltage stabilizing circuit 901.
The direct current stabilizing circuit 901 comprises a DC-DC direct current module 902, an input capacitor C12 and an output capacitor C13, wherein a capacitor C12 is connected between the input end of the DC-DC direct current module 902 and the ground in parallel, and the capacity of the capacitor C12 is less than 100 UF.
In fig. 4, the power supply terminal of the wireless control module 982 is connected to the output terminal V5V of the dc voltage stabilizing circuit 901, the signal output pin of the wireless control module 982 outputs 3 PWM control signals, which are connected to the rear stage MOS switch tube, and the output terminals of the switch tubes Q41, Q4, and Q5 are connected to the LED light source. In this embodiment, the wireless control module outputs 3 paths of R, G, and B PWM signals to control 3 paths of constant voltage LED light sources, respectively.
The above description is only a preferred example of the present invention, and certainly not to limit the scope of the present invention, so that the equivalent changes made in the claims of the present invention, such as changing the DC-DC voltage stabilizing circuit, simply changing the capacity of the capacitor C12, etc., are still covered by the present invention.
Claims (6)
1. The utility model provides an available power supply pulse control's thing networking power, includes switching power supply's rectifier circuit, filter circuit, power conversion circuit, output plastic filter circuit, sample steady voltage control circuit, gives the direct current voltage stabilizing circuit and the wireless control module component of wireless control module power supply, its characterized in that: the power supply of the internet of things controlled by the available power supply pulse also comprises,
the detection sampling module is used for detecting whether the alternating current power supply circuit is electrified or not, and the output end of the detection sampling module is connected with the input end of the photoelectric isolation module to transmit a detection signal to the photoelectric isolation module;
the output end of the photoelectric isolation module is connected with the input pin of the switch control module and is used for transmitting the state signal of the alternating current power supply circuit to the switch control module after photoelectric isolation;
the switch control module is connected to a power supply input end of a direct current voltage stabilizing circuit for supplying power to the wireless control module, and after the alternating current power supply circuit is powered off, the switch control module quickly turns off the direct current voltage stabilizing circuit, so that the power supply of the wireless control module is cut off.
2. The internet of things power supply capable of being controlled by the power supply pulse according to claim 1, wherein:
the detection sampling module comprises a rectification full bridge, a direct current output end of the rectification full bridge is connected to an input end of a resistor, an output end of the resistor is connected to an input end of the photoelectric isolation module, the output end of the resistor is connected to a capacitor, the other end of the capacitor is grounded, the resistor and the capacitor are connected in series to form an RC (resistor-capacitor) charging and discharging circuit, and the capacity of the capacitor is smaller than 20UF.
3. The internet of things power supply capable of being controlled by the power supply pulse according to claim 1, wherein:
the switch control module comprises two-stage amplification transistors, a base stage of the first-stage transistor is connected with the output end of the photoelectric isolation module, a collector electrode and an emitter stage of the second-stage transistor are connected in series in a power supply loop of the direct current voltage stabilizing circuit, and the direct current voltage stabilizing circuit is cut off from an input power supply end by the cut-off of the second-stage transistor.
4. The internet of things power supply capable of being controlled by the power supply pulse according to claim 1, wherein:
the direct current voltage stabilizing circuit is a linear three-terminal linear voltage stabilizer, a capacitor is connected between the input end of the three-terminal linear voltage stabilizer and the ground in parallel, the capacity of the capacitor is less than 100UF, and the positive output end of the direct current voltage stabilizing circuit is connected to the positive power supply end of the wireless control module.
5. The internet of things power supply capable of being controlled by the power supply pulse according to claim 1, wherein:
the photoelectric isolation module comprises a photoelectric coupler, an emitter of an output end of the photoelectric coupler is grounded, and a collector is connected to a VCC power supply end of the wireless control module through a resistor.
6. The power supply of the internet of things capable of being controlled by the power supply pulse according to any one of claims 1 to 5, wherein:
the output pin of the wireless control module for outputting the PWM control signal is connected to the dimming signal input end of the rear-stage constant current control chip, the model of the constant current control chip is FP7125, and the output end of the constant current control chip is connected with an LED light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022194707.4U CN213602569U (en) | 2020-09-29 | 2020-09-29 | Internet of things power supply capable of being controlled by power supply pulse |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022194707.4U CN213602569U (en) | 2020-09-29 | 2020-09-29 | Internet of things power supply capable of being controlled by power supply pulse |
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| Publication Number | Publication Date |
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| CN213602569U true CN213602569U (en) | 2021-07-02 |
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| CN202022194707.4U Active CN213602569U (en) | 2020-09-29 | 2020-09-29 | Internet of things power supply capable of being controlled by power supply pulse |
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