LED centralized driving lighting system and method of use

Abstract

The application provides a LED centralized driving lighting system, which comprises an LED driving power supply, a self-protection device, a self-recovery device and LED light sources. The LED driving power supply is connected in parallel to the main circuit of the lighting system, and is used for providing constant current source current output for the lighting system. A plurality of the LED light sources are connected in parallel to the main circuit in a ring connection or star type. The self-protection device comprises a line switch module and a current monitoring module. The self-recovery device comprises a power supply monitoring module, a logic control module and a dimming signal generation module. The self-protection and self-recovery devices are added between the LED light source side and the LED driving power supply side, so that the rated power of the LED driving power supply and the rated power of the LED light source are dynamically balanced. The biggest advantage brought by the dynamic balance between the LED driving power supply and the LED light source is that the physical separation between the LED driving power supply and the LED light source is realized, so that a new centralized power supply lighting system with N LED light sources and one LED driving power supply is constructed.

Description

Technical Field

[0001] This invention relates to the field of lighting systems, and more specifically to an LED centralized driving lighting system and its usage method. Background Technology

[0002] An LED chip is a solid-state semiconductor device. Under a specific driving voltage, the brightness of an LED is directly proportional to its forward current. Therefore, the industry typically uses constant current power supplies to drive LED chips. When the power of the constant current power supply exceeds the rated power of the LED, the lifespan of the LED chip will be shortened due to its own heat generation, or even lead to rapid burnout. To ensure that the output power of the LED driver power supply matches the rated power of the LED light source (chip), each lamp usually integrates an independent driver power supply. If a DC centralized driver lighting system with one driver power supply driving N LED light sources is to be built, the failure of some LED light sources (chips) will cause the other LED light sources to overload, thereby accelerating the failure of other light sources (chips) in the entire lighting system and causing the entire system to collapse. This avalanche-like failure mechanism greatly increases the risk of DC centralized driver lighting systems, and is one of the main reasons why DC centralized driver lighting systems can only be used in limited scenarios such as indoor light strips and cannot be promoted in municipal street lights, tunnel lights and other fields.

[0003] Existing centralized DC lighting systems generally include distributed drive systems, centralized drive combined light source series systems, and centralized drive combined light source parallel systems. Distributed drive systems are commonly used in municipal street lighting, tunnel lighting, etc. Figure 2 As shown, the system mainly consists of three parts: a lighting control box, cables, and luminaires. The intelligent LED luminaire primarily comprises four parts: an LED light source (chip module), a driver power supply, a lamp controller, and a housing. During product integration by the manufacturer, the LED light source and driver power supply must be matched one-to-one, with the driver power supply's output power equal to or less than the rated power of the LED light source. The final brightness of the LED luminaire is adjusted by controlling the driver power supply's output power through the lamp controller. (Lluminaire assembly...) Figure 3 The lighting controllers in the system are logically connected to the intelligent lighting gateway in the lighting control box via various methods such as ZigBee, carrier wave, and wired connections. The intelligent lighting gateway sends dimming commands to each lighting controller according to business needs. Upon receiving the dimming command, the lighting controller converts it into PWM, 0-10V, or other signals to adjust the output current of the driver power supply, thereby achieving the dimming function. Distributed drive systems suffer from low power efficiency, high maintenance costs, and high control costs.

[0004] like Figure 4As shown, a centralized driver-based series light source system uses a single driver to power multiple LED strips, with each strip connected in series. Each LED module operates at the same current, and its operating voltage is 1 / N of the driver's output voltage. The driver output voltage in this lighting system is relatively high, typically around 200V. However, centralized driver-based series light source systems suffer from limitations in building large systems and high driver power supply costs.

[0005] like Figure 5 As shown, a centralized driver-connected parallel light source system uses a single driver to power multiple LED light strips, with each LED light source (light strip) connected in parallel. To address voltage discrepancies between modules, a ring connection is typically used to ensure consistent operating voltage across all light strips. In this system, the voltage across each LED light source (light strip) is identical, and the input current is 1 / N of the driver's output current. However, this centralized driver-connected parallel light source system suffers from poor reliability. The system's driver output power must match the total rated power of the light sources. A failure in any light source (light strip) will cause overload operation of the other LED light sources. Therefore, this solution is typically only used in the industry to build low-power, low-cost lighting systems.

[0006] Therefore, there is an urgent need for a stable and reliable LED DC centralized drive lighting system. Summary of the Invention

[0007] This invention addresses the shortcomings of existing technologies by providing a centralized LED driving lighting system.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] On one hand, the present invention provides an LED centralized driving lighting system, including an LED driver power supply, a self-protection device, a self-recovery device, and LED light sources. The LED driver power supply is connected in parallel to the main circuit of the lighting system to provide a constant current source output for the lighting system. Several LED light sources are connected in parallel to the main circuit through a star connection or a ring connection. The self-protection device includes a circuit switch module and a current monitoring module. The circuit switch module is set on a branch circuit between each LED light source and the main circuit to receive a disconnection command issued by the current monitoring module. The input terminal of the current monitoring module monitors the current of the LED light source branch circuit, and the output terminal of the current monitoring module outputs a control signal to control the conduction and disconnection of the circuit switch module. The self-recovery device includes a power monitoring module, a logic control module, and a dimming signal generation module. The input terminal of the power monitoring module monitors the current or voltage output by the LED driver power supply, and the output terminal of the power monitoring module outputs a current signal to the logic control module. The output terminal of the logic control module outputs a control signal to control the dimming signal generation module to generate a dimming signal, and the output terminal of the dimming signal generation module outputs a dimming signal to the LED driver power supply to restore the lighting system to operation.

[0010] The usage method of this centralized LED lighting system is as follows:

[0011] Step 1: After the LED driver power supply is powered on, the current monitoring module monitors the current of the LED light source branch circuit in real time. When the current monitoring module detects that the current of a branch circuit exceeds the rated current of the LED light source, the current monitoring module outputs a control signal to control the circuit switch module to disconnect, realizing power-off protection. The faulty LED light source will accelerate the power-off protection of other LED light sources. After all LED light sources enter the power-off protection state, the output current of the LED driver power supply in the lighting system drops to the set value, and then the output voltage rises to the open circuit voltage.

[0012] Step 2: After the power monitoring module detects that the current output by the LED driver power supply is less than the set value or the output voltage rises to the open circuit voltage, the logic control module outputs a control signal to control the dimming signal generation module to generate a dimming signal to turn off the LED driver power supply, driving the voltage between the LED driver power supply and the LED light source to 0.

[0013] Step 3: After the voltage between the LED driver power supply and the LED light source is 0 and the power is cut off, the circuit switch module in the self-protection device is de-energized and automatically returns to the conducting state.

[0014] Step 4: The logic control module outputs a dimming signal to the LED driver power supply through the dimming signal generation module, reducing the output current of the LED driver power supply and restoring power to the lighting system.

[0015] Step 5: Repeat steps 1 to 4. After multiple iterations, the remaining LEDs in the lighting system, except for the faulty LED, will return to normal operation.

[0016] On the other hand, the present invention provides an LED centralized driving lighting system based on the above scheme. The self-protection device of the system further includes a communication module. The self-recovery device includes a receiving module that replaces the power monitoring module. The input terminal of the communication module receives the current signal output by the current monitoring module. The output terminal of the communication module is connected to the input terminal of the receiving module and outputs a current signal to the receiving module. The output terminal of the receiving module outputs the current signal received from the communication module to the logic control module.

[0017] The usage method of this centralized LED lighting system is as follows:

[0018] Step 1: After the LED driver power supply is powered on, the current monitoring module monitors the current of the LED light source branch circuit in real time. When the current monitoring module detects that the current of a branch circuit exceeds the rated current of the LED light source, the current monitoring module outputs a control signal to control the circuit switch module to disconnect, realizing power-off protection. At the same time, it outputs a current signal to the communication module. The faulty LED light source will accelerate the power-off protection of other LED light sources. After all LED light sources enter the power-off protection state, the output current of the LED driver power supply in the lighting system drops to the set value, and then the output voltage rises to the open circuit voltage.

[0019] Step 2: After receiving the current signal from the communication module, the receiving module outputs the current signal to the logic control module. The logic control module outputs a control signal to control the dimming signal generation module to generate a dimming signal to turn off the LED driver power supply, thereby driving the voltage between the LED driver power supply and the LED light source to 0.

[0020] Step 3: After the voltage between the LED driver power supply and the LED light source is 0 and the power is cut off, the circuit switch module in the self-protection device is de-energized and automatically returns to the conducting state.

[0021] Step 4: The logic control module outputs a dimming signal to the LED driver power supply through the dimming signal generation module, reducing the output current of the LED driver power supply and restoring power to the lighting system.

[0022] Step 5: Repeat steps 1 to 4. After multiple iterations, the remaining LEDs in the lighting system, except for the faulty LED, will return to normal operation.

[0023] To optimize the above technical solution, the specific measures also include:

[0024] Furthermore, the LED light source is a group of LED chip sets connected in series and / or in parallel.

[0025] Furthermore, the LED driver power supply is either a separate power supply or a power supply group connected in parallel.

[0026] Furthermore, the dimming signal is PWM, 0-10V, or DALI.

[0027] The beneficial effects of this invention are:

[0028] This invention utilizes the constant current output characteristic of the driving power supply and automatically matches the output power of the driving power supply with the total rated power of the LED light source through multiple adjustments and iterations, thereby constructing a highly reliable, large-scale lighting system with one driving power supply supporting N light sources.

[0029] This invention is applicable not only to small-scale lighting systems such as LED strips but also to larger-scale lighting systems such as streetlights and tunnel lighting. Its key features include: spatial separation of the driving power supply and the light source; centralized management of the driving power supply (typically integrated with a distribution cabinet or distribution box), while the light source is integrated into the luminaire as in traditional solutions; a single centralized driving power supply can simultaneously provide power to N light sources, and unified dimming of these N light sources can be achieved by adjusting the output of the driving power supply; the driving power supply is a constant current source with specific requirements, logically a single source, but physically it can be a single power supply or a group of power supplies connected in parallel; the light source side does not require other driving power supplies but consists of a set of monitoring and protection modules, providing over-limit protection only for the luminaire; automatic recovery on the power supply side is not achieved by establishing a third-party communication channel with the light source side, but by utilizing the physical characteristic that the output current of the driving power supply (constant current source) tends to zero after self-protection on the light source side, and the output voltage rises to the open-circuit voltage through continuous iteration; the system can be compatible with third-party signals for dimming, but the self-protection and self-recovery mechanisms, as a lower-level mechanism, are not affected by erroneous dimming commands from third parties. Attached Figure Description

[0030] Figure 1 Schematic diagrams of star and ring connections;

[0031] Figure 2 This is a schematic diagram of a distributed drive system structure;

[0032] Figure 3 This is a schematic diagram of an intelligent lighting assembly.

[0033] Figure 4 A schematic diagram of a centralized drive combined light source series system;

[0034] Figure 5 A schematic diagram of a centralized drive system with parallel light sources;

[0035] Figure 6 This is a schematic diagram of the system structure of Embodiment 1 of the present invention. Detailed Implementation

[0036] Example 1

[0037] like Figure 6 The LED centralized driving lighting system shown includes an LED driver power supply, a self-protection device, a self-recovery device, and LED light sources. The LED driver power supply is connected in parallel to the main circuit of the lighting system. The LED driver power supply is either a separate power supply or a power supply group connected in parallel, used to provide a constant current source output for the lighting system. Several LED light sources are connected via a star connection or a ring connection. Figure 1 The LED light source consists of several groups of LED chips connected in series, connected in parallel to the main circuit. The self-protection device includes a circuit switch module and a current monitoring module. The circuit switch module is located on a branch circuit between each LED light source and the main circuit, and is used to receive a disconnect command issued by the current monitoring module. The input terminal of the current monitoring module monitors the current in the branch circuit of the LED light source, and the output terminal of the current monitoring module outputs a control signal to control the conduction and disconnection of the circuit switch module. The self-recovery device includes a power monitoring module, a logic control module, and a dimming signal generation module. The input terminal of the power monitoring module monitors the current or voltage output by the LED driver power supply, and the output terminal of the power monitoring module outputs a current signal to the logic control module. The output terminal of the logic control module outputs a control signal to control the dimming signal generation module to generate a dimming signal. The dimming signal is PWM, and the output terminal of the dimming signal generation module outputs a dimming signal to the LED driver power supply to restore the lighting system to operation.

[0038] The usage method of this centralized LED lighting system is as follows:

[0039] Step 1: After the LED driver power supply is powered on, the current monitoring module monitors the current of the LED light source branch circuit in real time. When the current monitoring module detects that the current of a branch circuit exceeds the rated current of the LED light source, the current monitoring module outputs a control signal to control the circuit switch module to disconnect, realizing power-off protection. The faulty LED light source will accelerate the power-off protection of other LED light sources. After all LED light sources enter the power-off protection state, the output current of the LED driver power supply in the lighting system drops to the set value, and then the output voltage rises to the open circuit voltage.

[0040] Step 2: After the power monitoring module detects that the current output by the LED driver power supply is less than the set value or the output voltage rises to the open circuit voltage, the logic control module outputs a control signal to control the dimming signal generation module to generate a dimming signal to turn off the LED driver power supply, driving the voltage between the LED driver power supply and the LED light source to 0.

[0041] Step 3: After the voltage between the LED driver power supply and the LED light source is 0 and the power is cut off, the circuit switch module in the self-protection device is de-energized and automatically returns to the conducting state.

[0042] Step 4: The logic control module outputs a dimming signal to the LED driver power supply through the dimming signal generation module, reducing the output current of the LED driver power supply and restoring power to the lighting system.

[0043] Step 5: Repeat steps 1 to 4. After multiple iterations, the remaining LEDs in the lighting system, except for the faulty LED, will return to normal operation.

[0044] Example 2

[0045] An LED centralized driving lighting system based on Embodiment 1, wherein the self-protection device of the system further includes a communication module, and the self-recovery device includes a receiving module replacing the power monitoring module. The input terminal of the communication module receives the current signal output by the current monitoring module, the output terminal of the communication module is connected to the input terminal of the receiving module and outputs a current signal to the receiving module, and the output terminal of the receiving module outputs the current signal received from the communication module to the logic control module.

[0046] The usage method of this centralized LED lighting system is as follows:

[0047] Step 1: After the LED driver power supply is powered on, the current monitoring module monitors the current of the LED light source branch circuit in real time. When the current monitoring module detects that the current of a branch circuit exceeds the rated current of the LED light source, the current monitoring module outputs a control signal to control the circuit switch module to disconnect, realizing power-off protection. At the same time, it outputs a current signal to the communication module. The faulty LED light source will accelerate the power-off protection of other LED light sources. After all LED light sources enter the power-off protection state, the output current of the LED driver power supply in the lighting system drops to the set value, and then the output voltage rises to the open circuit voltage.

[0048] Step 2: After receiving the current signal from the communication module, the receiving module outputs the current signal to the logic control module. The logic control module outputs a control signal to control the dimming signal generation module to generate a dimming signal to turn off the LED driver power supply, thereby driving the voltage between the LED driver power supply and the LED light source to 0.

[0049] Step 3: After the voltage between the LED driver power supply and the LED light source is 0 and the power is cut off, the circuit switch module in the self-protection device is de-energized and automatically returns to the conducting state.

[0050] Step 4: The logic control module outputs a dimming signal to the LED driver power supply through the dimming signal generation module, reducing the output current of the LED driver power supply and restoring power to the lighting system.

[0051] Step 5: Repeat steps 1 to 4. After multiple iterations, the remaining LEDs in the lighting system, except for the faulty LED, will return to normal operation.

[0052] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A centralized LED lighting system, characterized in that, Includes LED driver power supply, self-protection device, self-recovery device and LED light source, The LED driver power supply is connected in parallel to the main circuit of the lighting system to provide a constant current source output for the lighting system. Several LED light sources are connected in parallel to the main circuit through a branch circuit. The self-protection device includes a circuit switch module and a current monitoring module. The circuit switch module is installed on the branch circuit between each LED light source and the main circuit. It is used to receive the disconnection command issued by the current monitoring module. The input terminal of the current monitoring module monitors the current of the LED light source branch circuit. The output terminal of the current monitoring module outputs a control signal to control the conduction and disconnection of the circuit switch module. The self-recovery device includes a power monitoring module, a logic control module, and a dimming signal generation module. The input terminal of the power monitoring module monitors the current or voltage output by the LED driver power supply. The output terminal of the power monitoring module outputs a current signal to the logic control module. The output terminal of the logic control module outputs a control signal to control the dimming signal generation module to generate a dimming signal. The output terminal of the dimming signal generation module outputs a dimming signal to the LED driver power supply to restore the lighting system to operation.

2. The LED centralized driving lighting system according to claim 1, characterized in that, The self-protection device also includes a communication module, and the self-recovery device includes a receiving module that replaces the power monitoring module. The input terminal of the communication module receives the current signal output by the current monitoring module, the output terminal of the communication module is connected to the input terminal of the receiving module and outputs a current signal to the receiving module, and the output terminal of the receiving module outputs the current signal received from the communication module to the logic control module.

3. The LED centralized driving lighting system according to claim 1 or 2, characterized in that, The LED light source is a group of LED chip sets connected in series and / or in parallel.

4. A centralized LED lighting system according to claim 1 or 2, characterized in that, The LED driver power supply can be a standalone power supply or a power supply group connected in parallel.

5. A centralized LED lighting system according to claim 1 or 2, characterized in that, The dimming signal is PWM, 0-10V, or DALI.

6. A method of using the LED centralized driving lighting system as described in claim 1, characterized in that, Includes the following steps: Step 1: After the LED driver power supply is powered on, the current monitoring module monitors the current of the LED light source branch circuit in real time. When the current monitoring module detects that the current of a branch circuit exceeds the rated current of the LED light source, the current monitoring module outputs a control signal to control the circuit switch module to disconnect, realizing power-off protection. The faulty LED light source will accelerate the power-off protection of other LED light sources. After all LED light sources enter the power-off protection state, the output current of the LED driver power supply in the lighting system drops to the set value, and the output voltage rises to the open circuit voltage. Step 2: After the power monitoring module detects that the current output by the LED driver power supply drops to the set value or the output voltage rises to the open circuit voltage, the logic control module outputs a control signal to control the dimming signal generation module to generate a dimming signal to turn off the LED driver power supply, so that the voltage between the LED driver power supply and the LED light source is 0. Step 3: After the voltage between the LED driver power supply and the LED light source is 0 and the power is cut off, the circuit switch module in the self-protection device is de-energized and automatically returns to the conducting state. Step 4: The logic control module outputs a dimming signal to the LED driver power supply through the dimming signal generation module, reducing the output current of the LED driver power supply and restoring power to the lighting system. Step 5: Repeat steps 1 to 4. After multiple iterations, the remaining LEDs in the lighting system, except for the faulty LED, will return to normal operation.

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