XG500毫安X线机设计比较先进,但控制电路仍存在不完善之处,如我院去年安装的一台使用近半年后,由于G_12和G_14两个可控硅击穿,使X线管长时间工作而损坏。一我们分析了电路的工作程序和特点,发现可利用原机未用的继电器控制接触点,稍微改动一下控制电路,就能解决因主控硅击穿引起的X线管过载的保护问题。具体电路如图所示,图中实线所示是原 XG500 milliampere X-ray machine design more advanced, but there are still imperfections in the control circuit, such as our hospital last year, the installation of a used nearly six months later, due to G_12 and G_14 two SCR breakdown, the X-ray tube length Time work and damage. We analyzed the working procedure and characteristics of the circuit and found that it is possible to use the unused relays of the original machine to control the contact points and slightly change the control circuit to solve the problem of overloading the X-ray tube caused by the breakdown of the main control silicon. Specific circuit as shown, the solid line shows the original