1. EMT 212 ANALOG ELECTRONICS Professor Robert T Kennedy

2. Prof. R T Kennedy

3. NEED FOR DC POWER QUALITY AC VOLTAGE FROM UTILITY VARIES AC VOLTAGE FROM UTILITY VARIES magnitude & frequency magnitude & frequency UK 230 V rms -10% +6 % UK 230 V rms -10% +6 % USA 120 V rms 90V 132 V USA 120 V rms 90V 132 V ELECTRONIC EQUIPMENT REQUIRES DC ELECTRONIC EQUIPMENT REQUIRES DC Prof. R T Kennedy

4. AC-DC VOLTAGE CONVERSION TRANSFORMATION TRANSFORMATION RECTIFICATION RECTIFICATION FILTERING FILTERING REGULATION REGULATION PROTECTION PROTECTION EMC COMPLIANCE EMC COMPLIANCE Prof. R T Kennedy

5. UNIVERSAL INPUT SYSTEMS MODERN GENERIC TERM for INPUT STAGES MODERN GENERIC TERM for INPUT STAGES work automatically work automatically over the extreme input AC voltage range over the extreme input AC voltage range early variants- manual select / configurable early variants- manual select / configurable Prof. R T Kennedy

6. MANUAL APPROACH TRANSFORMER TAPPING Prof. R T Kennedy  LOW FREQUENCY TRANSFORMER SIZE  HUMAN ERROR !

7. MANUAL APPROACH TRANSFORMER PRIMARY MODS SERIES PRIMARIES HIGH V IN LOW CURRENT SERIES PRIMARIES HIGH V IN LOW CURRENT PARALLEL PRIMARIES LOW V IN HIGH CURRENT PARALLEL PRIMARIES LOW V IN HIGH CURRENT Prof. R T Kennedy

8. AUTOMATIC VOLTAGE TRANSFER SWITCH A V S OPEN SWITCH = FW BRIDGE RECTIFIER OPEN SWITCH = FW BRIDGE RECTIFIER CLOSED SWITCH = VOLTAGE DOUBLER CLOSED SWITCH = VOLTAGE DOUBLER Prof. R T Kennedy