CN111194118A - LED driver and intelligent LED control system - Google Patents
LED driver and intelligent LED control system Download PDFInfo
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- CN111194118A CN111194118A CN202010032667.5A CN202010032667A CN111194118A CN 111194118 A CN111194118 A CN 111194118A CN 202010032667 A CN202010032667 A CN 202010032667A CN 111194118 A CN111194118 A CN 111194118A
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Abstract
The invention discloses an LED driver, which comprises an AC-DC converter, a DC-DC constant current output converter, a PWM dimming control unit, a power metering module and a serial communication interface module, wherein the power metering module is connected with the AC-DC converter; the input end of the AC-DC converter is connected with the commercial power output end, and the output end of the AC-DC converter is connected with the DC-DC constant current output converter; the DC-DC constant current output converter is used for converting different voltage values output by the AC-DC converter into stable direct current; the power metering module is in bidirectional communication connection with the AC-DC converter and is used for collecting and processing relevant data of the driver; the power metering module is connected with the PWM dimming control unit through the serial communication interface module; the PWM dimming control unit is connected with the DC-DC constant current output converter and used for regulating and controlling the output current of the DC-DC constant current output converter. The driver can reduce or eliminate power frequency ripples of the LED lamp, and can communicate with external equipment through the serial communication interface module of the driver to achieve the purpose of regulating and controlling the working state of the LED lamp.
Description
Technical Field
The invention relates to an LED driver and an intelligent LED control system.
Background
The LED lamp has been widely used in many lighting occasions, but often have the illumination area for example when great office has only a few people, all lamps are still in the on state or need the people to manually close one by one or with its brightness dim down, this is very unfavorable for energy-concerving and environment-protective, and the driver of some LED lamps that have now often adopts AC-DC switching power supply, but this kind of drive mode is because direct current output power frequency ripple is great, influence the comfort level of people's eyes, and when the LED lamp is full load work, the ripple can be more obvious, can reduce user's comfort level equally.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an LED driver and an intelligent LED control system.
The invention provides an LED driver, which comprises: the device comprises an AC-DC converter, a DC-DC constant current output converter, a PWM dimming control unit, a power metering module and a serial communication interface module; the input end of the AC-DC converter is connected with the commercial power output end, and the output end of the AC-DC converter is connected with the DC-DC constant current output converter; the DC-DC constant current output converter is used for converting different voltage values output by the AC-DC converter into stable direct current; the power metering module is in bidirectional communication connection with the AC-DC converter and is used for collecting and processing relevant data of the driver; the power metering module is connected with the PWM dimming control unit through the serial communication interface module; the PWM dimming control unit is connected with the DC-DC constant current output converter and used for regulating and controlling the output current of the DC-DC constant current output converter.
Preferably, the PWM dimming control unit includes an integrated chip U901, a diode D69, a zener diode D68, a common mode inductor L21, a first resistor R200, a second resistor R201, an inductor L4, an inductor L2, a diode D39, a third resistor R917, a fourth resistor R922, a fifth resistor R919, a capacitor C913, a sixth resistor R923, a seventh resistor R918, an eighth resistor R920, a ninth resistor R8, a capacitor C911, and a thermistor NTC 1; a fourth pin of the integrated chip U901 is connected to one end of the capacitor C913, one end of a fifth resistor R919, and one end of a fourth resistor R922, the other ends of the capacitor C913 and the fifth resistor R919 are connected to a ground line, the other end of the fourth resistor R922 is connected to a power supply end and one end of an electric third resistor R917, and the other end of the third resistor R917 is connected to an anode end of the diode D39; a cathode terminal of the diode D39 is connected to one terminal of the inductor L4, and the other terminal of the inductor L4 is connected to one terminal of the first resistor R200 and one terminal of the common mode inductor L21; the other end of the first resistor R200 and the other end of the common mode inductor L21 are connected with the cathode end of the voltage stabilizing diode D68; one end of the inductor L2 and the other end of the fifth resistor R919 are connected to the ground, and the other end of the inductor L2 is connected to one end of the second resistor R201 and one end of the common mode inductor L21; the other end of the second resistor R201 and the other end of the common-mode inductor L21 are connected with the anode end of the voltage stabilizing diode D68; the cathode end of the voltage-stabilizing diode D68 is connected with the cathode end of the diode D69 and is connected with the output end of the serial communication interface module, and the anode end of the voltage-stabilizing diode D68 is connected with the anode end of the diode D69 and is connected with the ground wire; a sixth pin of the integrated chip U901 is connected to one end of the seventh resistor R918, one end of the eighth resistor R920 and one end of the sixth resistor R923, the other end of the seventh resistor R918 is connected to a power supply terminal, the other end of the eighth resistor R920 is connected to the DC-DC constant current output converter, and the other end of the sixth resistor R923 is connected to a ground line; the fifth pin of the integrated chip U901 is connected to one end of the ninth resistor R8, one end of the capacitor C911 and one end of the thermistor NTC1, the other end of the ninth resistor R8 and the other end of the thermistor NTC1 are both connected to the ground, and the other end of the capacitor C911 is connected to a power supply terminal.
Preferably, an integrated chip 78M6613 is disposed within the power metering module.
Preferably, the relevant data collected by the power metering module includes the voltage, current and phase at the input end of the AC-DC converter and the temperature of the LED driver.
The invention also provides an intelligent LED control system which is characterized by comprising terminal equipment, a data acquisition module, at least one LED light source and at least one LED driver; the LED driver is correspondingly connected with the LED light source, and the terminal equipment is respectively in communication connection with the LED driver and the data acquisition module; the terminal equipment is used for processing the data collected by the data collection module, generating a reference power value for storage so as to compare with an operating power value generated in the LED driver, and then generating a control command to further regulate and control the working state of the LED light source.
Preferably, the terminal device is in communication connection with the power metering module through a serial communication interface module of the LED driver.
Preferably, the data acquisition module comprises an infrared sensor for detecting the number of people in the controlled area; the illumination sensor is used for collecting the light brightness of the controlled area; the color degree sensor is used for collecting the color degree of the controlled area; the temperature sensor is used for detecting the temperature of the controlled area; the humidity sensor is used for collecting the humidity of the controlled area.
The beneficial effects of the invention include: according to the invention, the output end of the AC-DC converter is connected with the DC-DC constant current output converter, so that power frequency ripples can be reduced or eliminated when the LED lamp is driven, the power metering module and the PWM dimming control unit are arranged in the LED driver, the collected signals can be sent to external equipment for processing to generate control signals, and finally the control signals are sent to the PWM dimming control unit connected with the DC-DC constant current output converter to adjust the working state of the LED lamp, so that intelligent regulation and control are realized.
Drawings
Fig. 1 is a block diagram of an intelligent LED control system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a circuit structure of the PWM dimming control unit according to the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the invention or its application.
Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts, unless otherwise specified.
As shown in fig. 1, the present embodiment provides an intelligent LED control system, which includes a terminal device, a data acquisition module, at least one LED light source, and at least one LED driver; the LED drivers are correspondingly connected with the LED light sources, namely each LED light source is provided with one LED driver, and the terminal equipment (the computer control terminal in the embodiment) is respectively in communication connection with the LED drivers and the data acquisition module; the terminal equipment is used for processing the data collected by the data collection module, generating information such as a reference power value and storing the information so as to compare the information with an operating power value generated in the LED driver and then generating a control command. The data acquisition module comprises an infrared sensor, and the infrared sensor detects the body temperature of people so as to detect the number of people in a room or an area (hereinafter referred to as a controlled area) and feed the number of people back to the terminal equipment for processing; the illuminance sensor is used for collecting and feeding back the brightness in the controlled area to the terminal equipment for processing; the color degree sensor is used for collecting the color degree in the controlled area and feeding the color degree back to the terminal equipment for processing; the temperature sensor is used for collecting the temperature in the detected controlled area and feeding the temperature back to the terminal equipment for processing; the humidity sensor is used for detecting humidity in the controlled area, collecting the humidity and feeding the humidity back to the terminal equipment for processing.
The LED driver in the intelligent LED control system comprises the following components: the device comprises an AC-DC converter, a DC-DC constant current output converter, a PWM dimming control unit, a power metering module and a serial communication interface module; the input end of the AC-DC converter is connected with the output end of the commercial power, and the output end of the AC-DC converter is connected with the DC-DC constant current output converter; the DC-DC constant current output converter is used for converting different voltage values output by the AC-DC converter into stable direct current, filtering high-frequency interference signals and reducing or eliminating ripple waves generated by the LED lamp; the PWM dimming control unit is connected with the DC-DC constant current output converter and is used for regulating and controlling the output current of the DC-DC constant current output converter so as to regulate and control the working states of the LEDs and the like; the power metering module is connected with the AC-DC converter and is used for collecting information such as voltage, current and phase of the input end of the AC-DC converter and temperature of the LED driver, processing the information and registering a control command sent by external equipment. An integrated chip 78M6613 is arranged in the power metering module, and can process the acquired information; the serial communication interface module is in bidirectional communication connection with the power metering module and used for information transmission between the power metering module and external equipment, and the serial communication interface module comprises RS232 and RJ45 communication interfaces. In the intelligent LED control system of this embodiment, the serial communication interface module is also connected to the terminal device in a bidirectional communication manner, and the output terminal of the DC-DC constant current output converter is connected to the LED light source. And an integrated chip U901 is arranged in the PWM dimming control unit and used for processing the received information and then sending the processed information to the DC-DC constant current output converter to control the output current of the DC-DC constant current output converter.
The circuit structure of the PWM dimming control unit comprises an integrated chip U901, a diode D69, a voltage stabilizing diode D68, a common mode inductor L21, a resistor R200, a resistor R201, an inductor L4, an inductor L2, a diode D39, a resistor R917, a resistor R922, a resistor R919, a capacitor C913, a resistor R923, a resistor R918, a resistor R920, a resistor R8, a capacitor C911 and a thermistor NTC 1; a fourth pin of the integrated chip U901 is connected to one end of a capacitor C913, one end of a resistor R919, and one end of a resistor R922, the other ends of the capacitor C913 and the resistor R919 are connected to a ground line, the other end of the resistor R922 is connected to a power supply terminal and one end of a resistor R917, and the other end of the resistor R917 is connected to an anode terminal of the diode D39; the cathode end of the diode D39 is connected to one end of the inductor L4, and the other end of the inductor L4 is connected to one end of the resistor R200 and one end of the common mode inductor L21; the other end of the resistor R200 and the other end of the common mode inductor L21 are connected with the cathode end of the voltage stabilizing diode D68; one end of an inductor L2 and the other end of the resistor R919 are connected with the ground wire together, and the other end of an inductor L2 is connected with one end of the resistor R201 and one end of the common-mode inductor L21; the other end of the resistor R201 and the other end of the common mode inductor L21 are connected with the anode end of the voltage stabilizing diode D68; the cathode end of the voltage stabilizing diode D68 is connected with the cathode end of the diode D69 and is connected with the output end of the serial communication interface module, and the anode end of the voltage stabilizing diode D68 is connected with the anode end of the diode D69 and is connected with the ground wire.
A sixth pin of the integrated chip U901 is connected to one end of the resistor R918, one end of the resistor R920 and one end of the resistor R923, the other end of the resistor R918 is connected to a power supply terminal, the other end of the resistor R920 is connected to the DC-DC constant current output converter, and the other end of the resistor R923 is connected to a ground line.
The fifth pin of the integrated chip U901 is connected with one end of a resistor R8, one end of a capacitor C911 and one end of a thermistor NTC1, the other end of the resistor R8 and the other end of the thermistor NTC1 are both connected with the ground wire, and the other end of the capacitor C911 is connected with a power supply end.
When the system is applied, the data acquisition module acquires relevant data of a controlled area within a period of time, the data comprises the number of people, temperature, humidity, brightness and the like of the controlled area at different time points, the data are transmitted to the computer control terminal, and the computer control terminal analyzes and processes the collected data to generate relevant information such as a reference power value and the like to be stored. The power metering module collects information such as voltage, current, phase and driver temperature of the AC-DC converter, processes the information to generate information such as running power and electric quantity consumption value which can be identified by the computer control terminal and sends the information to the computer control terminal through the serial communication interface, the computer control terminal compares the read information with a preset reference power value and then judges the information and generates a control command, the generated control command is fed back to the power metering module through the serial communication interface module to be registered, the power metering module sends the control command to the PWM dimming control unit through the serial communication interface module to regulate and control the output current of the DC-DC constant current output converter, and finally the dimming regulation of the LED lamp is realized. When the driver needs to be turned off, the computer control terminal can transmit a turn-off command to the power metering module through the serial communication interface module, and the power metering module processes the turn-off command and then sends the processed turn-off command to the AC-DC converter, so that the AC-DC converter is completely turned off, namely the whole driver does not consume electric energy. The shutdown command can be manually operated by the computer control terminal or executed according to related shutdown information preset in the computer control terminal.
Those skilled in the art will recognize that numerous variations are possible in light of the above description, and therefore the examples and drawings are merely intended to describe one or more specific embodiments.
While there has been described and illustrated what are considered to be example embodiments of the present invention, it will be understood by those skilled in the art that various changes and substitutions may be made therein without departing from the spirit of the invention. In addition, many modifications may be made to adapt a particular situation to the teachings of the present invention without departing from the central concept described herein. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments and equivalents falling within the scope of the invention.
Claims (7)
1. An LED driver, comprising: the device comprises an AC-DC converter, a DC-DC constant current output converter, a PWM dimming control unit, a power metering module and a serial communication interface module;
the input end of the AC-DC converter is connected with the commercial power output end, and the output end of the AC-DC converter is connected with the DC-DC constant current output converter; the DC-DC constant current output converter is used for converting different voltage values output by the AC-DC converter into stable direct current;
the power metering module is in bidirectional communication connection with the AC-DC converter and is used for collecting and processing relevant data of the driver;
the power metering module is connected with the PWM dimming control unit through the serial communication interface module;
the PWM dimming control unit is connected with the DC-DC constant current output converter and used for regulating and controlling the output current of the DC-DC constant current output converter.
2. The LED driver of claim 1, wherein the PWM dimming control unit comprises an integrated chip U901, a diode D69, a zener diode D68, a common mode inductor L21, a first resistor R200, a second resistor R201, an inductor L4, an inductor L2, a diode D39, a third resistor R917, a fourth resistor R922, a fifth resistor R919, a capacitor C913, a sixth resistor R923, a seventh resistor R918, an eighth resistor R920, a ninth resistor R8, a capacitor C911, and a thermistor NTC 1;
a fourth pin of the integrated chip U901 is connected to one end of the capacitor C913, one end of a fifth resistor R919, and one end of a fourth resistor R922, the other ends of the capacitor C913 and the fifth resistor R919 are connected to a ground line, the other end of the fourth resistor R922 is connected to a power supply end and one end of an electric third resistor R917, and the other end of the third resistor R917 is connected to an anode end of the diode D39; a cathode terminal of the diode D39 is connected to one terminal of the inductor L4, and the other terminal of the inductor L4 is connected to one terminal of the first resistor R200 and one terminal of the common mode inductor L21; the other end of the first resistor R200 and the other end of the common mode inductor L21 are connected with the cathode end of the voltage stabilizing diode D68; one end of the inductor L2 and the other end of the fifth resistor R919 are connected to the ground, and the other end of the inductor L2 is connected to one end of the second resistor R201 and one end of the common mode inductor L21; the other end of the second resistor R201 and the other end of the common-mode inductor L21 are connected with the anode end of the voltage stabilizing diode D68; the cathode end of the voltage-stabilizing diode D68 is connected with the cathode end of the diode D69 and is connected with the output end of the serial communication interface module, and the anode end of the voltage-stabilizing diode D68 is connected with the anode end of the diode D69 and is connected with the ground wire;
a sixth pin of the integrated chip U901 is connected to one end of the seventh resistor R918, one end of the eighth resistor R920 and one end of the sixth resistor R923, the other end of the seventh resistor R918 is connected to a power supply terminal, the other end of the eighth resistor R920 is connected to the DC-DC constant current output converter, and the other end of the sixth resistor R923 is connected to a ground line;
the fifth pin of the integrated chip U901 is connected to one end of the ninth resistor R8, one end of the capacitor C911 and one end of the thermistor NTC1, the other end of the ninth resistor R8 and the other end of the thermistor NTC1 are both connected to the ground, and the other end of the capacitor C911 is connected to a power supply terminal.
3. The LED driver of claim 1, wherein an integrated chip 78M6613 is disposed within the power metering module.
4. The LED driver of claim 1, wherein the relevant data collected by the power metering module includes voltage, current and phase at the input of the AC-DC converter and temperature of the LED driver.
5. An intelligent LED control system, which is characterized by comprising a terminal device, a data acquisition module, at least one LED light source and at least one LED driver as claimed in any one of claims 1 to 4; the LED driver is correspondingly connected with the LED light source, and the terminal equipment is respectively in communication connection with the LED driver and the data acquisition module; the terminal equipment is used for processing the data collected by the data collection module, generating a reference power value for storage so as to compare with an operating power value generated in the LED driver, and then generating a control command to further regulate and control the working state of the LED light source.
6. The intelligent LED control system of claim 5, wherein the end device is communicatively connected to the power metering module through a serial communication interface module of the LED driver.
7. The intelligent LED control system of claim 5, wherein the data acquisition module comprises an infrared sensor for detecting the number of people in the controlled area; the illumination sensor is used for collecting the light brightness of the controlled area; the color degree sensor is used for collecting the color degree of the controlled area; the temperature sensor is used for detecting the temperature of the controlled area; the humidity sensor is used for collecting the humidity of the controlled area.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010032667.5A CN111194118A (en) | 2020-01-13 | 2020-01-13 | LED driver and intelligent LED control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010032667.5A CN111194118A (en) | 2020-01-13 | 2020-01-13 | LED driver and intelligent LED control system |
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| CN111194118A true CN111194118A (en) | 2020-05-22 |
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| CN202010032667.5A Pending CN111194118A (en) | 2020-01-13 | 2020-01-13 | LED driver and intelligent LED control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113382505A (en) * | 2021-06-16 | 2021-09-10 | 中国民用航空总局第二研究所 | Navigation aid lamp driving control device based on broadband power line carrier communication |
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2020
- 2020-01-13 CN CN202010032667.5A patent/CN111194118A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113382505A (en) * | 2021-06-16 | 2021-09-10 | 中国民用航空总局第二研究所 | Navigation aid lamp driving control device based on broadband power line carrier communication |
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