智能照明技术篇：关于0-10V 调光技术

老外事情就是多，照明就照明了，长这么大所用过的灯无非就是ON/OFF。什么调光，舒适，环保，是这几年比较开的概念。0-10v调光技术的优点在于应用简单、效率高、精度高，且调光效果好。智能照明0-10V的缺点：驱动能力不够，如果要加上线性或者PWM调光功能，就需要改变灯具设计，增加控制线，因此也就无法顺畅地做到替换性改造了。PWM调光的频率为200~20kHz之间时，LED驱动器周围的电感和输出电容易产生人耳听得见的噪声。

  经常听客户问0-10V调光，字面上好理解，就其原理，渊源可能没有几个人知道，下面是我看正统的英文资料的翻译：

    控制类型0-10V

   0-10V 是一模拟方式的灯光控制标准。实际上是改变一个0～10V的电压信号，从而控制灯光亮度。现有2种0-10V控制标准，二者不能兼容。起初0-10V控制用于剧场的，照明控制台为连接的调光模块调光通道提供单独0-10V输出信号，另外一种0-10V控制用于日光灯驱动器。现在流行于LED驱动器。

     原文：

Control type:  0-10V

0-10V is an analog lighting control protocol. Basically, a 0-10V control applies a voltage

between 0 and 10 volts DC to produce a varying intensity level. There are actually

two existing 0-10V standards. They are not compatible with each other, so it is essential

to understand which type is required.  The original 0-10V control was used for controlling

theatrical lighting. A lighting console provides a separate 0-10V output for each dimming

channel that connects to the input to dimmer modules located in a remote panel. The

other 0-10V control method was developed for, and is used as, a standard means for

controlling fluorescent dimming ballasts.  It has now become popular for some drivers

used for LED lighting.

   按照标准当控制信号在10V时驱动器输出应该是100%，通过控制器调小 0-10V 信号，光线将减小，当信号

原文：

   The standard requires that the ballast (or driver)  provides full light output when the control

voltage is 10 Volts (or above). As the control voltage is reduced by the control, the light

level is reduced. At a control voltage of 1 volt, the ballast (driver) provides it’s minimum

light level.  Any voltage less than 1 volt is defined as minimum. Some drivers' minimum

is off, while other drivers' minimum is the lowest light level of the driver.  It is important to

understand what minimum is for a particular driver.  For drivers that do not go to off at

minimum, a separate relay or switching device is required.

另外标准60929中考虑了控制系统的电流容量问题，规定各驱动器0-10V信号输入端消耗电流

原文：

An additional specification that needs to be considered is the current carrying capacity of

the control.  Standard 60929 Annex E requires the ballast (driver) to limit the current

draw to 2.0 mA maximum.  This means that a control with a 50mA capacity can operate

25 ballasts (drivers) if they have a specified current of 2.0mA.