What is a 0-10V dimming power supply, does it mean that its voltage is 0-10V? What is the difference between 0-10V dimming and SCR dimming?

Today, the editor is here to tell you the difference between the two.

      First of all, we need to know that to adjust the brightness of the LED, the current flowing through the LED must be changed, because the current magnitude and the luminous flux are approximately linear. The larger the current, the brighter the LED will emit light, and the smaller the current, the darker the light will be; the fundamental difference lies in the thyristor dimming The method is to use the chopping function of the thyristor to adjust the input voltage of the dimming drive power supply, thereby changing the output current of the dimming power supply.

      0/1-10V is to provide a 0-10V variable voltage through a 0-10V dimmer Provide 0-10V dimming power supply to change the output current and achieve the purpose of changing brightness. SCR dimming was used in the dimming method of incandescent lamps and energy-saving lamps in the early stage, and it is also the most widely used LED dimming method on the market. A dimming method. Its working principle is to produce a tangential output voltage waveform after the input voltage waveform is cut through the conduction angle. Applying the tangential principle can reduce the effective value of the output voltage of the thyristor dimmer, thereby reducing the power of the ordinary load (resistive load). Thyristor dimmers have the advantages of high adjustment accuracy, high efficiency, small size, light weight, and easy long-distance operation. They are dominant in the market, and most manufacturers' products are this type of dimmers. The advantages of using thyristor dimmers on LED lighting are: low dimming cost, compatibility with existing circuits, no need for rewiring, and suitable for old renovation projects. The disadvantage is that the thyristor dimming performance is poor, which usually leads to a reduction in the dimming range; there is a matching problem between the dimming power supply and the dimming controller, and there are often flashing problems; when the dimming module is applied, there are generally Minimum load requirements, too low load power will also cause flicker, and mutual interference will occur when multiple lights are dimmed. 

      Because of the properties of the thyristor semi-controlled switch, it only has the function of turning on the current, but not completely turning off the current. Even if it is adjusted to the lowest level, there is still a weak current passing, and the light-emitting characteristics of the LED micro-current makes the use of thyristor dimming a large number of The phenomenon of weak light emission still exists after the LED is turned off, which has become a problem in the promotion of this kind of wiring-free LED dimming method.

Wiring mode of thyristor dimming power supply

The 0-10V dimming power supply is designed with a control chip. When the 0-10V dimmer is connected, the output current of the power supply can be changed through the 0-10V voltage change, and the light will be reduced. For example: when the 0-10V dimmer is modulated to 0V, When the current drops to 0, the brightness of the light is off (there is a switch function). When the 0-10V dimmer is adjusted to a maximum of 10V, the output current will reach 100% of the power output, and the brightness will also be 100%. (The output voltage is constant). 

      1-10V dimming principle: as explained above, but the dimmer is 1-10V: when the resistance dimmer is adjusted to the minimum 1V, the current that changes the output is also 10%, such as At 10V (adjusted to the maximum), the output current will reach 100% of the power output, and the brightness will also be 100%. (The output voltage is unchanged). Note: 1-10V does not have a switch function, and the lamp cannot be adjusted to the minimum Close the effect. The advantage of 0-10V dimming is that there is no compatibility problem between the dimming power supply and the dimmer, and the dimming performance is relatively good; the disadvantage is that it requires a set of 0-10V signal lines, which is not suitable for old changes. project.

First of all, we need to know that to adjust the brightness of the LED, the current flowing through the LED must be changed, because the current magnitude and the luminous flux are approximately linear. The larger the current, the brighter the LED will emit light, and the smaller the current, the darker it will emit light;

The fundamental difference is that the triac dimming method uses the chopping function of the triac to adjust the input voltage of the dimming drive power supply, thereby changing the output current of the dimming power supply. 0/1-10V is through 0- The 10V dimmer provides a 0-10V variable voltage to the 0-10V dimming power supply, thereby changing the output current and achieving the purpose of changing the brightness.

Triac dimming has been applied to incandescent lamps and energy-saving lamp dimming methods in the early days, and it is also the most widely used dimming method of LED dimming on the market. Its working principle is to produce a tangential output voltage waveform after the input voltage waveform is cut through the conduction angle. The application of the tangential principle can reduce the effective value of the output voltage of the triac dimmer, thereby reducing the power of the ordinary load.

Triac dimmers have the advantages of high adjustment accuracy, high efficiency, small size, light weight, and easy long-distance operation. They are dominant in the market, and most manufacturers' products are this type of dimmers. The advantages of using a triac dimmer for LED lighting are: low dimming cost, compatibility with existing circuits, no need for rewiring, and suitable for old renovation projects.

The disadvantage is that the triac dimming performance is poor, which usually causes the dimming range to be reduced; there is a matching problem between the dimming power supply and the dimming controller, and flashing problems often occur; when the dimming module is used, it is generally There is a minimum load requirement. If the load power is too low, flickering will occur, and mutual interference will occur when multiple lights are dimmed.

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