1. High Voltage Supply

2. High voltage Supplies Generators should provide a smooth constant high voltage to the X-ray tube.

3. Transformers Step up transformers N primary = 100 N secondary = 50000 V primary = 240V V secondary = 120 kV N primary N secondary

5. Single phase Full Rectification

6. High frequency power supplies Modern High Voltage supplies use a high high frequency chopped DC voltage (500V) which is transformed to a high voltage (74kV) The 500V DC signal is chopped at between 20kHz and 30 kHz and transformed using a step up transformer to 74kV. The smoothed supply may have a ripple of below 3%

7. A Typical Frequency Generator : HSA RP Kilovolts  kV selections: 80,1 00,120, and 140 kV  Basic kVp Accuracy:+ 3% +/- (3% + 2kV) Excludes first 10msec of exposure  kVp during first 10 ms: Basic accuracy +/- 5 kV Milliamperes  mA selections: 40 to 400 mA, by 10 mA increments Patient scanning subject to tube limitations and 48kW maximum

8. Chopped 550 Supply

9. Resonance Voltage Control