Networking segmented timing dimming power supply
By designing a network segmented timing dimming power supply, wireless communication and RS485 modules realize cluster control and segmented timing dimming of LED light sources, solving the problems of high cost of existing equipment and limited adjustment range, and achieving efficient and low-cost LED light source regulation.
Patent Information
- Application Number
- CN202421822345.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The existing LED light source control equipment is costly and has limited adjustment range, so it is impossible to achieve cluster control and segmented timing dimming for multiple devices.
A network segmented timing dimming power supply is designed, and a wireless communication module and RS485 module are used to realize network communication between the main controller and the slave controller. Cluster control is performed through the Modbus network, and an RTC clock unit is introduced into the main controller to achieve accurate segmented timing dimming.
Remote networking control of multiple LED light sources is realized, equipment costs are reduced, control scope is expanded, synchronous control between each light source is ensured, and control efficiency is improved.
Smart Images
Figure CN222928544U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of LED control, and particularly to a networking segmented timing dimming power supply. Background Art
[0002] LED lighting is an efficient, environmentally friendly and comfortable lighting technology, which has been widely used in public lighting environments such as roads, tunnels, office places, shopping malls, etc. To adjust the light according to corresponding influencing factors such as weather conditions, traffic environment, work requirements, passenger flow conditions, etc., improve the lighting effect and comfort, it is necessary to adjust the intensity of the LED light, and set the timing on and off of the LED light source according to the natural environment light. For example, in the road lighting scenario, as the natural light intensity gradually decreases in the evening, it is required to gradually increase the light intensity of the LED light source; when the number of people and vehicles is extremely small in the late night, the light intensity of the LED light source can be appropriately reduced; when the natural light intensity gradually increases at dawn, it is necessary to gradually reduce the light intensity of the LED light source; thus, it is necessary to perform segmented timing control on the LED light source.
[0003] Existing segmented timing products known to the inventors, such as Bluetooth timing power supplies, although they can be timed, due to the limited communication distance, the control coverage range is small, and due to Bluetooth protocol problems, they can only be connected one-to-one with mobile devices, and cannot achieve cluster control of multiple devices. In the case of multiple devices, there will be problems such as missed settings due to insufficient coverage; while using ordinary switch power supply control requires separate cooperation with timing switches, the overall number of devices is large, the cost is high, and although the timing switch can control the on and off of the lamp, it cannot perform segmented timing automatic switching.
[0004] The information disclosed in this background art section is only used to deepen the understanding of the background art of the present disclosure, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art. Summary of the Invention
[0005] In view of at least one of the above technical problems, the present disclosure provides a networking segmented timing dimming power supply, aiming to solve the technical problems of high cost and limited adjustment range of existing LED light source control devices.
[0006] According to one aspect of the present disclosure, a networking segmented timing dimming power supply is provided, which includes a main controller provided with a wireless communication module, a plurality of slave controllers in wired communication connection with the main controller, and a control terminal for wireless communication connection with the main controller; the main controller and each of the slave controllers are respectively connected to the LED light source to be regulated; the main controller and the slave controllers respectively include a power regulation output module electrically connected to the mains power supply and provided with a PWM control unit, a sampling feedback module for sampling the output of the power regulation output module and electrically connected to the input end of the PWM control unit, a main control timing module for outputting a control signal, a power switch module electrically connected between the output port of the main control timing module and the output port of the power regulation output module, and an RS485 module for communication between the main controller and the slave controllers; the main control timing module of the main controller further includes an RTC clock unit.
[0007] In some embodiments of the present disclosure, the wireless communication module is a 4G communication module.
[0008] In some embodiments of the present disclosure, the control terminal is a smart phone, a tablet or a PC.
[0009] In some embodiments of the present disclosure, the power regulation output module includes a rectification and filtering unit, the PWM control unit, and a voltage transformation and output unit that are electrically connected in sequence.
[0010] In some embodiments of the present disclosure, the rectification and filtering unit is a full-bridge rectification circuit, the PWM control unit uses a PWM control chip with the model number OB2263, and the voltage transformation and output unit is a transformer with a main winding and an auxiliary winding on the input side.
[0011] In some embodiments of the present disclosure, the sampling feedback module includes a three-terminal voltage regulator, and the control terminal of the three-terminal voltage regulator is electrically connected to the sampling point of the sampling feedback module; the sampling feedback module further includes an optocoupler provided between the output end of the three-terminal voltage regulator and the input end of the PWM control unit.
[0012] In some embodiments of the present disclosure, the main controller and the slave controllers further respectively include a buck circuit unit electrically connected to the output end of the power regulation output module for providing other levels of voltage.
[0013] In some embodiments of the present disclosure, the RTC clock unit includes a real-time clock chip with a crystal oscillator connected to corresponding pins, the main control timing module includes a main control chip, and the RTC clock unit is electrically connected to the I / O port of the main control chip correspondingly.
[0014] In some embodiments of the present disclosure, the RS485 module between the main controller and the slave controller is communicatively connected correspondingly by a twisted pair wire.
[0015] One or more technical solutions provided in the embodiments of the present application have at least any one of the following technical effects or advantages:
[0016] 1. A Modbus network is established between the main controller and each slave controller through the RS485 module and the twisted pair wire, so that the communication within the network is not interfered by the outside world, the networking range is large, the transmission rate is high, and the delay is small. Therefore, the synchronous control between light sources can be ensured. In addition, through the Modbus networking method, the segmented timing dimming and switch information can be updated to the main controller and each slave controller in the Modbus network to perform segmented timing dimming and switching of the light source lights, and the segmented timing dimming and switch data can be stored in the chip of the wireless communication module for a long time. Therefore, remote control is realized, labor is saved, and the control efficiency is improved.
[0017] 2. The RTC clock unit can provide accurate real-time clock information for the main controller and each slave controller, and then be used as a reference benchmark for setting the control time, ensuring the accuracy and reliability of the control time.
[0018] 3. The 4G communication chip is only arranged in the main controller, and each slave controller is connected to the main controller in a wired connection mode through Modbus networking. Therefore, while ensuring the data transmission efficiency and reliability, the number of components of each slave controller can be reduced, and the equipment manufacturing cost can be lowered. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a block diagram of the composition principle of the networking segmented timing dimming power supply in an embodiment of the present application.
[0020] Figure 2 It is a block diagram of the composition principle of the main controller in an embodiment of the present application.
[0021] Figure 3 It is a block diagram of the composition principle of the slave controller in an embodiment of the present application.
[0022] Figure 4 It is a circuit schematic diagram of the power control output module in an embodiment of the present application.
[0023] Figure 5 It is a circuit schematic diagram of the sampling feedback module in an embodiment of the present application.
[0024] Figure 6 It is a circuit schematic diagram of the RTC clock unit in an embodiment of the present application.
[0025] Figure 7 It is a circuit schematic diagram of the power switch module in an embodiment of the present application. Detailed implementation manners
[0026] The programs involved or relied on in the following embodiments are all conventional programs or simple programs in this technical field, and those skilled in the art can make conventional selections or adaptive adjustments according to specific application scenarios. The components involved in the following embodiments, unless otherwise specified, are all conventional commercially available products.
[0027] To better understand the technical solution of the present application, the above technical solution will be described in detail below in conjunction with the specification drawings and specific implementation manners.
[0028] To solve the technical problems that the existing LED light source timing products have single functions and need to be used in combination with a switching power supply and a timer, and the adjustment range is relatively narrow, this example discloses a networking segmented timing dimming power supply. See Figure 1 , this dimming network includes a main controller and several slave controllers that are connected to the main controller by twisted pair for wired communication. In this embodiment, the main controller and several slave controllers specifically form a Modbus network through RS485 communication to achieve network cluster control. In addition, this dimming network also includes a control terminal that communicates wirelessly with the main controller. Correspondingly, a wireless communication module is provided in the main controller to receive the control signal of the control terminal or upload the data information in the controller to the control terminal. By connecting the light sources to be regulated to the main controller and each slave controller respectively, remote networking regulation of the LED light source is achieved. In this embodiment, the wireless communication module uses a 4G communication module, and the control terminal is a smart phone. The control information is configured through the application software or applet installed on the smart phone; in some other embodiments, the control terminal is a tablet or a PC.
[0029] See Figure 2 and Figure 3 , the main controller and the slave controllers together include a power regulation output module, a sampling feedback module, a main control timing module, a power switch module, and an RS485 module. The main controller and the slave controllers are respectively connected to the mains power supply, and convert the mains power supply into corresponding power outputs according to the control information to drive the LED light sources connected thereto. Among them, the combination of the 4G communication module and the RS485 module in the main controller realizes the gateway function, and an RS458 module communicatively connected to the main controller is provided in the slave controller. After the dimming network is formed, master-slave control between the main controller and each slave controller is achieved.
[0030] Specifically, see Figure 4 , the power regulation output module is used to adjust the 220V AC mains power supply into a corresponding power output according to the control requirements. It includes a rectification and filtering unit, a PWM control unit, and a voltage transformation and output unit that are electrically connected in sequence.
[0031] The rectifying and filtering unit is used to rectify and filter alternating current into direct current. Refer to Figure 4 , in this example, a full-bridge rectifying circuit composed of diodes D101, D102, D103, and D104 is adopted for AC-DC conversion. Then, the rectified direct current is filtered by capacitor C101 to obtain a DC voltage of approximately 310V.
[0032] The PWM control unit is used to regulate the duty cycle and thus change the output power of the power regulation output module. Specifically, in this embodiment, the PWM control unit specifically includes a PWM control chip U101 of model OB2263. Its FB pin receives the feedback signal output by the sampling feedback module through port P1, and then adjusts the output of the PWM control chip U101 according to this feedback signal. In addition, the VDD pin of the PWM control chip U101 is connected to the output of the rectifying and filtering unit through resistor R103 and grounded through capacitor C103. Thus, after the rectifying and filtering unit works, capacitor C103 is charged through resistor R103. When the voltage across capacitor C103 rises to reach the startup voltage of the PWM control chip U101, the PWM control chip U101 starts to work, and its GATA pin starts to output high-level pulses.
[0033] The PWM control unit is followed by a voltage transformation output unit, which includes a transformer with a main winding N3 and an auxiliary winding N2 on the input side. The GATA pin of the PWM control chip U101 is connected to the main winding N3 through MOS transistor Q101. When the GATA pin of the PWM control chip U101 outputs a high-level pulse, since its GATA pin is connected to the gate of MOS transistor Q101, MOS transistor Q101 is turned on, so that the current in the main winding N3 on the input side of the transformer increases and the transformer stores energy; when the GATA pin of the PWM control chip U101 outputs a low-level pulse, MOS transistor Q101 is turned off. At this time, a part of the energy stored in the transformer is unidirectionally rectified to capacitor C103 through the auxiliary winding N2 on the input side and diode D106, thus ensuring continuous power supply to the PWM control chip U101; another part of the energy stored in the transformer is rectified by the output side winding N1 of the transformer and large-current diode D107 and used as power output.
[0034] Before the voltage between the output ports Uout of the power regulation output module reaches the set value, the PWM duty cycle output by the PWM control chip U101 gradually increases, so that the output voltage gradually rises. To make its output voltage stable at the set value, a sampling feedback module is set in this example. Refer to Figure 5, the sampling input port P2 of the sampling feedback module is connected to the output end of the power regulation output module, and the feedback output port P1 of the sampling feedback module is connected to the FB pin of the PWM control chip U101. To achieve sampling feedback, the sampling feedback module specifically includes a three-terminal voltage regulator U201 of model TL431. The sampling input port is sequentially connected to the control end of the three-terminal voltage regulator U201 through a diode D201 and a resistor R201. The output end of the three-terminal voltage regulator U201 is connected to the FB pin of the PWM control chip U101 through an optocoupler U103. Thus, when the output voltage of the power regulation output module gradually rises to a voltage greater than the startup voltage of 2.5V of the voltage regulator input to the control end of the three-terminal voltage regulator U201, the three-terminal voltage regulator U201 conducts, and then the diode at the emitting end of the optocoupler is energized and conducts. The output end of the optocoupler outputs a feedback signal to the FB pin of the PWM control chip U101 through port P1. After receiving the feedback signal, the PWM control chip U101 reduces the PWM duty cycle and lowers the output voltage, thereby forming a feedback regulation control to ensure the regulated output of the power regulation output module.
[0035] The main control timing module is the control core of the regulator, which is used to respond to the control information sent by the control terminal and output corresponding control signals to the other corresponding modules in the regulator. In this embodiment, the main control timing module is a WiFi main control chip with a memory. For the main regulator, the WiFi main control chip is respectively equipped with a 4G communication module and an RS485 module. In this example, the 4G communication module uses a 4G communication chip of model AIR724MD_ZLI to perform data transmission with the control terminal through this 4G communication chip; for the slave regulator, its WiFi main control chip is also equipped with an RS485 module. Furthermore, the RS485 modules of the main regulator and the slave regulators are connected through twisted pairs for communication, so as to realize the networking of the main regulator and each slave regulator. In addition, the memory of the WiFi main control chip can store the control commands and timing commands to complete multi-segment timing control.
[0036] When performing segmented timing regulation, the regulator needs to be based on a certain time reference. At the same time, to reduce the networking cost, in this embodiment, the main control timing module of the main regulator also includes an RTC clock unit, and uses the real-time clock of this RTC clock unit as the time reference for segmented timing. Specifically, see Figure 6 , in this example, the RTC clock unit specifically uses a real-time clock chip of model PCF8563T. This chip uses the SDA pin and the SCL pin to correspond to the I / O ports of the WiFi main control chip with I 2The C bus communication connection sends real-time clock signals, and its OSCO pin is correspondingly connected to a crystal oscillator to ensure the stability and reliability of its timing. In this example, the PCF8563T real-time clock chip is equipped with a backup memory battery to keep the clock running continuously after a power outage. During the working process after networking, after the 4G communication chip of the main controller receives the control signal from the control terminal, it serially transmits the control signal data to the WiFi main control chip. The WiFi main control chip stores and analyzes the control signal, compares the segmented timing time parsed with the real-time clock of the RTC clock unit, and then the WiFi main control chip outputs the corresponding control signal to regulate the LED light source and distributes it to the slave controller through the RS485 module. After the slave controller performs address parsing, it responds to the control signal accordingly.
[0037] To enable the control signal output by the WiFi main control chip to regulate the LED light source, in this embodiment, a power switch module is provided between the control signal output port of the WiFi main control chip and the output port of the power regulation output module. Specifically, refer to Figure 4 and Figure 7 , the power switch module is connected between the P3 port at the output end of the power regulation output module. It includes an electronic switch composed of MOS transistors Q801 and Q802. Its P4 port is connected to the control signal output pin of the WiFi main control chip to receive and phase the control signal of the WiFi main control chip. Since the control signal of the P4 port is respectively connected to the gates of MOS transistors Q801 and Q802 through the parallel resistors R801 and R802, the conduction degree of MOS transistors Q801 and Q802 is controlled, thereby realizing the control of the output power of the power regulation output module, and further achieving the purpose of segmented timing control of the light source.
[0038] In addition, to provide the corresponding working voltage levels for the WiFi main control chip and the 4G communication chip of the main controller, the main controller and the slave controller also respectively include a buck circuit unit electrically connected to the output end of the power regulation output module. Specifically, the buck circuit unit of the slave controller includes an LDO buck power supply circuit for supplying the working voltage to the WiFi main control chip. This LDO buck power supply circuit is based on a linear voltage regulator chip of model BL9153-3.3 and supplies 3.3V voltage to the WiFi main control chip. In addition, in addition to the LDO buck power supply circuit provided in the main controller to supply the 3.3V voltage required for the operation of the WiFi main control chip and the RTC clock unit, a DC / DC buck circuit is also provided, which outputs 3.8V voltage for powering the 4G communication chip based on a switching buck chip of model JW5033S.
[0039] Although some preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present application.
[0040] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of its inventive concept. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.
Claims
1. A networked segmented timing dimming power supply, characterized in that: It includes a master controller provided with a wireless communication module, a plurality of slave controllers connected to the master controller by wired communication, and a control terminal for wireless communication connection with the master controller; the master controller and each of the slave controllers are respectively connected to the LED light source to be controlled; The master regulator and the slave regulator respectively include a power control output module electrically connected to the AC power supply and provided with a PWM control unit, a sampling feedback module used to sample the output of the power control output module and electrically connected to the input end of the PWM control unit, a master control timing module used to output a control signal, a power switch module electrically connected between the output port of the master control timing module and the output port of the power control output module, and an RS485 module used for communication between the master regulator and the slave regulator; the master control timing module of the master regulator also includes an RTC clock unit.
2. The networked segmented timing dimming power supply according to claim 1, characterized in that: The wireless communication module is a 4G communication module.
3. The networked segmented timing dimming power supply according to claim 1, characterized in that: The control terminal is a smart phone, a tablet or a PC.
4. The networked segmented timing dimming power supply according to claim 1, characterized in that: The power control output module includes a rectifying and filtering unit, the PWM control unit, and a voltage conversion output unit which are electrically connected in sequence.
5. The networked segmented timing dimming power supply according to claim 4, characterized in that: The rectification and filtering unit is a full-bridge rectification circuit, the PWM control unit adopts a PWM control chip of model OB2263, and the voltage transformation output unit is a transformer including a main winding and an auxiliary winding on the input side.
6. The networked segmented timing dimming power supply according to claim 1, characterized in that: The sampling feedback module includes a three-terminal regulator, a control end of the three-terminal regulator is electrically connected to a sampling point of the sampling feedback module; the sampling feedback module also includes an optical coupler arranged between the output end of the three-terminal regulator and the input end of the PWM control unit.
7. The networked segmented timing dimming power supply according to claim 1, characterized in that: The master regulator and the slave regulator also respectively include a step-down circuit unit electrically connected to the output end of the power regulation output module for providing other levels of voltage.
8. The networked segmented timing dimming power supply according to claim 1, characterized in that: The RTC clock unit comprises a real-time clock chip whose corresponding pins are connected to a crystal oscillator, the main control timing module comprises a main control chip, and the RTC clock unit is electrically connected to an I / O port of the main control chip.
9. The networked segmented timing dimming power supply according to claim 1, characterized in that: The RS485 modules between the master controller and the slave controller are connected for communication using twisted pair cables.