ppt. x-ray machine operation: the x-ray
circuit Exam| Questions and Answers
Verified 100% Correct
what type of rectification does three phase power operate under? - ✔✔full
wave rectification only
-3 coils of wired rotating in a magnetic field
-need 6 rectifiers
advantage with three phase power - ✔✔-gives us more uniformed energy
-higher energy x-ray kV
-shorter exposure time
-higher mA station
-somewhat lower patient's dose
resulting waveform never drops to 0
how many rectifiers does a three phase 6 pulse generator need? - ✔✔min 6-12
how many rectifiers does a three phase 12 pulse generator need? - ✔✔12
how are full wave rectified power at 60hZ is converted to a higher frequency (MHz) - ✔✔by
using a DC chopper
advantage of high frequency generators - ✔✔resulting beam almost zero voltage ripple
, -generators much smaller
-get to use higher mAs and kV
-image quality is improved with lower patient dose
what type of machines were the first to use high freq generator? - ✔✔mobile x-ray machines
what type of rectification can single phase power work under? - ✔✔half and full
wave rectification
half wave 0-2 rectifiers
full wave 4 rectifiers
voltage swings from 0 to max potential 120times/sec for full rectification
single phase- negative half is omitted
what is voltage ripple? - ✔✔the amount of voltage peak and trough (at 0) between waves
voltage ripple for single phase - ✔✔100%
voltage ripple 3-phase, 6 pulse - ✔✔13%
Voltage ripple for 3-phase, 12 pulse - ✔✔4%
voltage ripple for high frequency - ✔✔<1%
what is potential difference? - ✔✔voltage
circuit Exam| Questions and Answers
Verified 100% Correct
what type of rectification does three phase power operate under? - ✔✔full
wave rectification only
-3 coils of wired rotating in a magnetic field
-need 6 rectifiers
advantage with three phase power - ✔✔-gives us more uniformed energy
-higher energy x-ray kV
-shorter exposure time
-higher mA station
-somewhat lower patient's dose
resulting waveform never drops to 0
how many rectifiers does a three phase 6 pulse generator need? - ✔✔min 6-12
how many rectifiers does a three phase 12 pulse generator need? - ✔✔12
how are full wave rectified power at 60hZ is converted to a higher frequency (MHz) - ✔✔by
using a DC chopper
advantage of high frequency generators - ✔✔resulting beam almost zero voltage ripple
, -generators much smaller
-get to use higher mAs and kV
-image quality is improved with lower patient dose
what type of machines were the first to use high freq generator? - ✔✔mobile x-ray machines
what type of rectification can single phase power work under? - ✔✔half and full
wave rectification
half wave 0-2 rectifiers
full wave 4 rectifiers
voltage swings from 0 to max potential 120times/sec for full rectification
single phase- negative half is omitted
what is voltage ripple? - ✔✔the amount of voltage peak and trough (at 0) between waves
voltage ripple for single phase - ✔✔100%
voltage ripple 3-phase, 6 pulse - ✔✔13%
Voltage ripple for 3-phase, 12 pulse - ✔✔4%
voltage ripple for high frequency - ✔✔<1%
what is potential difference? - ✔✔voltage
