An X-ray generator is a device that powers an X-ray tube by supplying it with an electrical current, producing X-rays. X-ray generators are the primary control mechanism for fluoroscopes and are used in a variety of applications, including airport security and student baggage screening. 
Here are some things to know about X-ray generators:
Types
X-ray generators can be single-phase, three-phase, constant potential, or high-frequency. High-frequency generators are often used in new radiographic equipment because they are compact, affordable, and have low repair costs. 
Components
X-ray generators contain transformers, diodes, rectifier circuits, filament and stator circuits, timer switches, and kilovolt and milliampere meters. 
Control
The operator uses the generator control console to set the tube voltage, tube current, exposure time, and other parameters. 
Focal spot size
The size of the focal spot on the X-ray tube affects the magnification of the image. Smaller spot sizes are more expensive, but are useful for magnifying objects. 
X-ray tube
The X-ray tube contains the cathode, which emits electrons, and the anode, which produces X-rays.