Industry: solar led street lamp need PPTC done through the thermal protection is necessary dynamic | | industry lighting: solar led in the countryside
Solar LED street lamp system from solar panels, battery, charge and discharge circuit, LED light-emitting section, etc, in terms of the system itself, the each functional circuit or device is independently, and work in a very unstable in the light of the environment.
Solar street lamps need PPTC do Guo Liu over temperature protection is necessary.
If the intensity of the light from the sun is not stable, high and low temperature instability, while working on a voltage conversion circuit and current circuit system heat instability and so on, can lead to circuit components work fatigue and accelerated ageing and to shorten the life.
Are part of the solar LED street light in the transportation vibration or installing a connection error, the short circuit will make solar LED street lamp failure in advance, also can appear in its production debugging equipment wiring short circuit burned device, and the lights in the work, we must demand LED luminous intensity of high stability, can achieve the goal of road lighting, this requires that we must deal with these problems.
There are many kinds of methods to solve the above problem, the most simple way is between battery and conversion circuit, as well as between conversion circuit and LED lights used glass fuse do over-current protection, the temperature fuse or bimetallic thermostat do over temperature protection.
Can also be applied electronic circuits for detection and protection module to achieve the purpose of protecting circuit, each have their advantages and disadvantages, glass fuse and temperature fuse is one-off, prone to frequent replacement and inconvenience, bimetallic thermostat and easy appear under the condition of constant electric reclosing failure load and expanding the scope of the fault;
The maloperation of the electronic circuit sensitivity is higher at the same time, low cost and high reliability.
To solve good overtemperature, overcurrent, short circuit protection in time and don't again after replacing the fuse, also do not appear to protect through fault circuit, and reduce the cost, this a series of problems, at present only PPTC can achieve this goal.
So here suggest application of PPTC components do solar LED street light through the temperature protection.
PPTC and self-healing fuse or fuse ten thousand times, can be applied to different circuit, different current voltage and temperature requirements, to choose a model, in series to the battery and the conversion circuit, as well as between conversion circuit and LED lights series, PPTC is low resistance when the normal work.
When the temperature of the solar LED street lamp in excess of the prescribed, or in excess of the prescribed current PPTC will instantly become a high resistance, limits the current of the circuit in time and achieve the purpose of protection of solar LED street light system.
After the blackout or troubleshooting PPTC automatic recovery for low resistance, solar LED street lamp circuit for the normal working state, PPTC in the absence of electricity is not automatic recovery, won't produce under the condition of constant electric reclosing failure load and the problem that the expanding the scope of the fault, but also solves the overtemperature, overcurrent, short circuit protection in time after without replacing the fuse.
So solar street lamps need PPTC done through the thermal protection (
Solar photovoltaic power generation is one of the global competition to the development and utilization of green energy, in recent years, except to build large-scale solar power plants in China, will also spend hundreds of billions of RMB to develop solar street lights, guangdong during the 12th five alone will invest more than billions of scale of solar LED street light construction funds, this is a very large LED photovoltaic industry.
, outdoor lighting project purchasing solar street light is looking for professional manufacturer lighting, solar street lamps hotline 4000760286).