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Solar street lighting control principle
2018-09-05


Solar street lighting is automatically controlled to turn on and off, so many people can't help but have some questions.

Question 1: Where is the light control switch?

Some physical common sense will come to mind that photosensitive semiconductors have an automatic perception of the intensity of light, and this feature can be used to control the circuit. So where is the light control switch for solar street lights?

Question 2: If you are inside or below the light pole, how do you feel the intensity of light to achieve light control?

Question 3: If it is outside, is it under the solar panel?


answer:

In fact, solar street lights do not have a specific semiconductor device, so the control switch that people imagined does not exist.

Light control components for solar street lights: solar panels, batteries and controllers.

Principle: As long as the light reaches a certain degree of darkness, the solar street light will automatically turn on the running illumination, which is not limited by time, and is only related to the intensity of light.

The solar street lighting control is mainly realized by the controller. The controller generally has a light control point (control point) voltage, most of which is 3V. When the sun is weak, the voltage of the panel will continue to drop, from the normal 17.5V or 35V to the dark 0V. In the middle of the process, when it is lower than 3V, the controller will get a dark signal, which will be delayed for a period of time (the time can be set, in order to prevent this voltage drop from being temporarily reduced, such as a sudden dark cloud caused by the daytime Black, or the solar photovoltaic panel is blocked by something), after the delay, it is still lower than 3V. At this time, the controller judges that it is dark, and it will connect the battery and the lamp head (light source lamp). At this time, the street lamp will constitute With a complete loop, the light source is illuminated.

On the contrary, the process from dark to day is like this: before dawn, the circuit of the battery and the luminaire are connected, the illuminating illumination of the luminaire, the photovoltaic panel and the battery are disconnected, and there is no closed loop. As the day slowly brightens and the illuminance becomes stronger, the voltage perceived by the photovoltaic panel also increases slowly. When the photo-controlled voltage value exceeds 3V, the controller will have a delay time to judge. When the delay time exceeds the delay time, the photovoltaic panel voltage When it is still greater than or equal to 3V of the light control voltage, the controller judges that the day is bright, and the closed circuit composed of the battery and the light source is disconnected, and the connection between the photovoltaic panel and the battery is turned on, thereby charging and discharging.

For the problem of solar street lighting control, we have made detailed answers for everyone. The solar lighting components of solar street lamps have solar panels, batteries and controllers. Mainly controlled by the controller for solar street lighting.




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