Rectification
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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.

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RECTIFICATION

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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 CURRENT1 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/CHow an Electric Generator Works


BATTERY – CURRENT OUTPUT

STEADY D/C


A/C vs Steady D/Crectification


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/xmwang/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/xmwang/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 TEST-

    3 PHASE WITH LONGER EXPOSURE TIMES

  • OSCILLOSCOPE- 3 PHASE EQUIPMENT WITH SHORT EXPOSURE TIMES


SPINNING TOP TEST


RESULT OF SPINNING TOP TEST- 1 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-3PHASEARC


3 PHASE RECTIFICATION-LONGER EXPOSURE TIME

DEG. OF ARC = 360°/ sec x TIME (sec)


UTILIZING OSCILLOSCOPE


UTILIZING OSCILLOSCOPERECTIFIED SYSTEM


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