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RECTIFICATION X-RAY CIRCUIT Whenever the art of medicine is loved, there is also love for humanity. Hippocrates RECTIFICATION PROCESS BY WHICH ALTERNATING CURRENT IS CHANGED TO PULSATING DIRECT CURRENT A/C GENERATOR A/C CURRENT 1 PHASE A/C ( UNRECTIFIED)- FREQUENCY 60 Hz 60 POSITIVE PULSES/SEC 60 NEGATIVE PULSES/SEC 60 POSITIVE PULSES 60 NEGATIVE PULSES 120 PULSES 60 FULL CYCLES D/C GENERATOR D/C PULSATING CURRENT Pulsating D/C vs A/C How an Electric Generator Works BATTERY – CURRENT OUTPUT STEADY D/C A/C vs Steady D/C rectification D/C HALF WAVE RECTIFIED D/C HALF-WAVE – 60 POSITIVE PULSES/SEC NEGATIVE PULSES ARE SUPPRESSED 1 PULSE/CYCLE D/C FULL WAVE RECTIFIED D/C HALF-WAVE – 120 POSITIVE PULSES/SEC 2 PULSES/CYCLE THREE PHASE POWER http://www.shermanlab.com/xmw ang/javappl/acMotor1.html D/C -3 PHASE 6 PULSE CURRENT D/C 3 PHASE 6 PULSE – 6 PULSES/CYCLE D/C - 3 PHASE 12 PULSE D/C 3 PHASE 12 PULSE – 12 PULSES/CYCLE DIODES OR VALVE TUBES HELP RECTIFY A/C CURRENT ELECTRONS DIODE VALVE TUBE VALVE TUBE DIODE X-RAY TUBE FORWARD BIAS REVERSE BIAS - + NO X-RAY FORWARD vs REVERSE RECTIFICATION TYPES ► HALF-WAVE ► FULL WAVE ► THREE PHASE SIX PULSE ► THREE PHASE TWELVE PULSE ► HIGH FREQUENCY SINGLE PHASE RECTIFICATION – I PHASE NO RECTIFICATION HALF-WAVE FULL-WAVE THREE PHASE POWER http://www.shermanlab.com/xmw ang/javappl/acMotor1.html 3 PHASE RECTIFICATION 3 PHASE RECTIFICATION HIGH FREQUENCY RECTIFICATION HALF-WAVE RECTIFICATION HALF-WAVE RECTIFICATION FULL-WAVE RECTIFICATION FULL-WAVE RECTIFICATION FULL-WAVE RECTIFICATION 3 PHASE 6 PULSE 3 PHASE 12 PULSE HIGH FREQUENCY RIPPLE VOLTAGE RIPPLE ► HALF WAVE------------------- 100% ► FULL WAVE ------------------ 100% ► 3 PHASE 6 PULSE ----------- 13% ► 3 PHASE 12 PULSE ---------- 4% ► HIGH FREQUENCY ---------- <1% RIPPLE 200% 100% 100% RIPPLE-3 PHASE 13% RIPPLE-HIGH FREQUENCY <1% Home-made x-ray apparatus CHECKING FAILURE OF RECTIFICATION SYSTEM ► SPINNING TOP TEST – 1 PHASE EQUIPMENT ► SYNCHRONOUS SPINNING TOP TEST3 PHASE WITH LONGER EXPOSURE TIMES ► OSCILLOSCOPE- 3 PHASE EQUIPMENT WITH SHORT EXPOSURE TIMES SPINNING TOP TEST RESULT OF SPINNING TOP TEST1 PHASE - DASHES HALF- WAVE RECTIFICATION # OF DASHES = TIME (SEC) x 60 PULSES FULL- WAVE RECTIFICATION # OF DASHES = TIME (SEC) x 120 PULSES RESULT OF SYNCHRONOUS SPINNING TOP TEST-3PHASE ARC 3 PHASE RECTIFICATIONLONGER EXPOSURE TIME DEG. OF ARC = 360°/ sec x TIME (sec) UTILIZING OSCILLOSCOPE UTILIZING OSCILLOSCOPE RECTIFIED SYSTEM