CN103763827A - Novel networked distributed LED power supply system - Google Patents

Abstract

The invention discloses a new type of networked distributed LED power supply system, which adopts the segmental concentration-single lamp constant current power supply mode, and is composed of a segmental concentration-single lamp constant current power supply by a ground voltage source and a single lamp digital constant current device. System, the two realize the information sharing of constant voltage source and constant current source through the highly reliable half-duplex communication mode, and are equipped with a dedicated standard communication interface to realize group measurement and group control among multiple power supplies and lamps based on the host computer; Solve the reliability, efficiency and management problems of traditional LED lamps, and make the decline of heat dissipation capacity caused by the rise of ambient temperature be balanced by reducing the input power, so that the temperature of the radiator can be kept within a safe range , to avoid high temperature damage to LED devices, especially suitable for occasions where the ambient temperature changes greatly. Because the networked distributed LED power supply system only uses a small amount of hardware, it is simple to implement, easy to popularize, improves reliability, and expands the scope of use.

Description

A New Networked Distributed LED Power Supply System

technical field

The invention relates to a novel networked distributed LED power supply system.

Background technique

The temperature of the working environment of LED lights, especially LED street lights, varies greatly. It may be below minus 20 degrees in winter and over 60 degrees in summer. The large temperature difference brings trouble to the heat dissipation design. If it is designed according to the highest temperature environment, the weight and cost of the LED lamp will increase. If it is designed according to the lowest temperature environment, it will be difficult to solve the reliability problem under high temperature environment conditions.

Since the LED lamp is a cold light source, there is no heat radiation, and it is completely dissipated by the lamp body, and the thermal stress will exceed the standard. This not only affects the life of the LED illuminant, but also affects the reliability of the power supply installed in the same lampshade. Due to the decline in the reliability of LED illuminants and power supplies, the installed street lights are likely to be damaged in a short period of time. However, in a lampshade space with limited space, it is quite difficult to solve the "mutual baking" problem between the LED illuminant and the power supply, and another way must be found.

In addition, with the development and popularization of informatization, higher requirements have been put forward for the monitoring of lighting such as street lights, squares, workshops, and highway tunnels: it is necessary to be able to monitor all lighting lights in the area and master the operation of each light. state, and can implement control functions for single lamps.

Referring to Figure 1, in the document "A Centralized Power Supply Scheme for High-Power LED Lighting System" (Application of Power Supply Technology, 2012, Vol. 15, No. 8, 22-26), the multi-module parallel working technology is used to provide lighting for public places. Adopt centralized power supply mode. The AC power is added to the rectifier module through the AC power distribution device, and the rectifier module converts the AC voltage into the DC stable voltage required by the LED lamps. The DC power distribution device supplies power to the external LED lamps through various switches, and the local monitoring system monitors each part. detection and control.

However, this solution cannot achieve information sharing between the power supply and the load lamps, and the failure of the lamps cannot be detected, and there are hidden dangers in reliability; because the monitoring and control of a single lamp cannot be realized, the lighting quality and energy-saving effect are also greatly reduced.

Contents of the invention

In order to avoid the deficiencies of the prior art, to overcome the problem of the inability to monitor and control a single lamp, and the mutual baking between the illuminant and the power supply, the present invention proposes a new type of networked distributed LED power supply system. The distributed LED power supply system adopts the "segmented concentration-single lamp constant current" power supply mode to realize information sharing among multiple power supplies and lamps and a distributed LED power supply system for group measurement and group control.

The technical scheme adopted by the present invention to solve the technical problem is: adopt the power supply mode of segmented concentration-single lamp constant current, the ground voltage source and the single lamp digital constant current device together form a segmented concentration-single lamp constant current power supply system, two Through the half-duplex communication method, the constant voltage source and the constant current source information are shared, and it is equipped with a standard communication interface to realize the group measurement and group control of multiple power supplies based on the host computer;

Segmented concentration - single-lamp constant current power supply mode takes every 30-50 lamps as a power supply segment, powered by a 3-5kw high-power voltage source, and each lamp is equipped with a remote-controlled single-lamp digital constant current device; high-power LED The driving power supply and lamps are separated, and the LED power supply is realized in the order of "constant voltage first, then constant current". The constant voltage source supplies power to multiple independent constant current sources, and then each constant current source independently Supply power to one LED;

The ground voltage source monitors and controls the operating status of each LED lamp of the load, including the current brightness, fault, ambient temperature, and radiator temperature, and stores and uploads the monitored operating status of the LED lamp to the host computer, and realizes sound and light at the same time. Alarm; high-power voltage source controls the on/off of lamps, LED brightness control based on PWM adjustment, including single lamp dimming or group control dimming within the range of voltage source load; the control method comes from the upper layer group control network The upper computer, or set it separately through its interface in the power supply;

The single lamp digital constant current device receives the digital control command from the voltage source and the hardware control circuit of online self-adaptive compensation to realize dimming and on/off.

Beneficial effect

A new type of networked distributed LED power supply system proposed by the present invention adopts the segmental concentration-single lamp constant current power supply mode, and consists of segmental concentration-single lamp constant current power supply by ground voltage source and single lamp digital constant current device System, the two realize the information sharing of constant voltage source and constant current source through the highly reliable half-duplex communication mode, and are equipped with a dedicated standard communication interface to realize group measurement and group control among multiple power supplies and lamps based on the host computer; Solve the reliability, efficiency and management problems of traditional LED lamps, and make the decline of heat dissipation capacity caused by the rise of ambient temperature be balanced by reducing the input power, so that the temperature of the radiator can be kept within a safe range , to avoid high temperature damage to LED devices, especially suitable for occasions where the ambient temperature changes greatly. Since the technology only uses a small amount of hardware, it is simple to implement and easy to promote. Compared with the method in the prior art, the networked distributed LED power supply system of the present invention improves reliability, reduces cost, and expands the application range.

Description of drawings

A new type of networked distributed LED power supply system of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a schematic diagram of a centralized power supply system in the background art.

Fig. 2 is a schematic diagram of segmented concentration-single lamp constant current power supply mode.

Fig. 3 is a structural schematic diagram of segmented concentration-single lamp constant current power supply mode.

Fig. 4 is a schematic structural diagram of a distributed LED power supply system.

Fig. 5 is a schematic diagram of networking of multiple power supplies in a distributed LED power supply system.

Detailed ways

This embodiment is a new type of networked distributed LED power supply system.

Referring to Fig. 2-Fig. 5, the present invention adopts the "segmented concentration-single lamp constant current" power supply mode, which is composed of a floor-standing high-power voltage source and a single-lamp digital constant current device on the lamp, and its LED drive power is separated from the lamp , to prevent the two from "mutually roasting". Every 30-50 lamps will be used as a power supply section, powered by a 3-5kw high-reliability intelligent high-power voltage source; each lamp is equipped with a single-lamp digital constant current device that can be digitally controlled to ensure stable, Efficient constant current power supply. When realizing LED power supply, according to the order of "constant voltage first, then constant current", the constant voltage source supplies power to multiple independent constant current sources, and then each constant current source supplies power to one LED independently.

The ground voltage source and the single-lamp digital constant current device together constitute a "segmented centralized-single-lamp constant current" power supply system. The two realize the information sharing of the constant voltage source and the constant current source through the information network through a highly reliable half-duplex communication method. At the same time, it is also equipped with a dedicated standard communication interface to realize group measurement and group control of multiple power supplies based on the host computer.

The ground voltage source monitors and controls each LED fixture of the load. Monitor the operating status of lamps including current brightness, fault, ambient temperature, and radiator temperature; store and upload the monitored operating status of LED lamps to the host computer, and realize sound and light alarms at the same time. Control items include on/off, LED brightness control based on PWM adjustment, and single lamp dimming or group control dimming within the range of voltage source load. The need is judged by the large power supply and implemented through control commands. The control mode comes from the host computer of the upper-level group control network, or it can be set separately in the power supply through its interface.

The single-lamp digital constant current device receives digital control commands from the voltage source to realize dimming and shutdown; the constant current source includes a hardware control circuit for online self-adaptive compensation, which is based on the current value of the LED lamp radiator and its rate of change, online automatically Adapt to adjust the input power of LED lamps, and balance the decrease of heat dissipation capacity caused by the rise of ambient temperature by reducing the input power, so that the temperature of the radiator can be kept within a safe range, and avoid high temperature damage to LED devices, especially It is suitable for occasions where the ambient temperature changes greatly. At the same time, the current operating status of the lamps can be sent back to realize information sharing.

The ground voltage source and the single-lamp digital constant current device together constitute a "segmented centralized-single-lamp constant current" power supply system. The two realize the information sharing of the constant voltage source and the constant current source through the information network through a highly reliable half-duplex communication method. At the same time, it is also equipped with a dedicated standard communication interface, which can realize group measurement and group control of multiple power supplies based on the host computer.

The present invention adopts the "segmented concentration-single lamp constant current" power supply mode, and multiple "segmented concentration-single lamp constant current" power supply systems are networked to form a distributed LED power supply system to realize information between multiple power supplies and lamps. Sharing and group measurement and group control solve the reliability, efficiency and management problems of traditional LED lamps.

Claims (1)

1. A new type of networked distributed LED power supply system, characterized in that it adopts the power supply mode of segmental concentration-single lamp constant current, and the ground voltage source and single-lamp digital constant current device together form segmental concentration-single lamp constant current The power supply system realizes information sharing between the constant voltage source and the constant current source through half-duplex communication, and is equipped with a standard communication interface to realize group measurement and group control of multiple power supplies based on the host computer; Segmented concentration - single-lamp constant current power supply mode takes every 30-50 lamps as a power supply segment, powered by a 3-5kw high-power voltage source, and each lamp is equipped with a remote-controlled single-lamp digital constant current device; high-power LED The driving power supply and lamps are separated, and the LED power supply is realized in the order of "constant voltage first, then constant current". The constant voltage source supplies power to multiple independent constant current sources, and then each constant current source independently Supply power to one LED; The ground voltage source monitors and controls the operating status of each LED lamp of the load, including the current brightness, fault, ambient temperature, and radiator temperature, and stores and uploads the monitored operating status of the LED lamp to the host computer, and realizes sound and light at the same time. Alarm; high-power voltage source controls the on/off of lamps, LED brightness control based on PWM adjustment, including single lamp dimming or group control dimming within the range of voltage source load; the control method comes from the upper layer group control network The upper computer, or set it separately through its interface in the power supply; The single lamp digital constant current device receives the digital control command from the voltage source and the hardware control circuit of online self-adaptive compensation to realize dimming and on/off.

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