D:\edtech 2\2006 0906 uninterruptible_power_supplies

UNINTERRUPTIBLE POWER SUPPLIES

UNINTERRUPTIBLE POWER SUPPLIES ,[object Object]

UNINTERRUPTIBLE POWER SUPPLIES OUTLINE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

INTRODUCTION ,[object Object],[object Object],[object Object]

PURPOSE ,[object Object],[object Object]

WHAT IS AN UNINTERRUPTIBLE POWER SUPPLY? ,[object Object],[object Object]

WHY USE A UPS? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

POWER DISTURBANCES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CAUSES OF POWER DISTURBANCES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

TYPES OF POWER DISTURBANCES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

DURATION OF POWER DISTURBANCES ,[object Object],[object Object],[object Object],[object Object]

CLASSIFICATION OF PROBLEMS RESULTING FROM POWER DISTURBANCES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

PROBLEMS RESULTING FROM POWER DISTURBANCES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

POWER DISTURBANCES - COMMENTS ,[object Object],[object Object]

WHAT THE POWER UTILITY CAN DO TO MINIMIZE THE EFFECT OF POWER DISTURBANCES ,[object Object],[object Object],[object Object],[object Object]

WHAT THE OEM CAN DO TO MINIMIZE THE EFFECT OF POWER DISTURBANCES ,[object Object],[object Object],[object Object],[object Object],[object Object]

WHAT YOU CAN DO TO MINIMIZE THE EFFECT OF POWER DISTURBANCES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

PROTECTIVE DEVICES OTHER THAN UPS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

POWER DISTURBANCES AND PROTECTIVE DEVICES

UPS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

UPS ARCHITECTURES ,[object Object],[object Object]

BLOCK DIAGRAM LINE INTERACTIVE UPS BATTERY CHARGER AC SUPPLY INVERTER DC TO AC CRITICAL LOAD (AC) BATTERY AUTOMATIC SWITCH AC FAIL

BLOCK DIAGRAM ON-LINE UPS CONVERTER AC TO DC AC SUPPLY INVERTER DC TO AC CRITICAL LOAD (AC) BATTERY AUTOMATIC SWITCH INVERTER FAIL

BLOCK DIAGRAM LAPTOP COMPUTER POWER SUPPLY CONVERTER AC TO DC AC SUPPLY CONVERTER DC TO DC BATTERY CRITICAL LOAD (DC)

UPS WAVEFORMS ,[object Object],[object Object],[object Object]

INVERTER TECHNOLOGY FOR TRUE SINEWAVE ,[object Object],[object Object],[object Object]

BLOCK DIAGRAM PWM INVERTER HIGH FREQUENCY GENERATOR PULSE WIDTH MODULATOR BASE / GATE DRIVE TRANSISTOR BRIDGE TRANSFORMER FILTER CRITICAL LOAD (AC) REFERENCE SINEWAVE GENERATOR COMPARISON AMPLIFIER DC POWER

BLOCK DIAGRAM LINEAR AMPLIFER INVERTER OSCILLATOR AMPLIFIER SINEWAVE OSCILLATOR TRANSFORMER COMPARISON AMPLIFIER POWER AMPLIFIER CRITICAL LOAD (AC) DC POWER

BLOCK DIAGRAM RESONANT INVERTER SQUARE WAVE GENERATOR SWITCH DRIVE TRANSISTOR SWITCHES TRANSFORMER LC RESONANT TANK FILTER CRITICAL LOAD (AC) DC POWER (OR FERRORESONANT)

UPS COMPONENTS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SWITCHOVER TIME ,[object Object],[object Object],[object Object]

ADVANTAGES / DIS-ADVANTAGES OF THE DIFFERENT UPS ARCHITECTURES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SIZING THE UPS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

UPS SIZING – EXAMPLE SPREADSHEET

BATTERY SAFETY ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

GENERAL DISCUSSION ,[object Object],[object Object],[object Object]

DOES A UPS OFFER COMPLETE PROTECTION? ,[object Object],[object Object]

DO YOU THINK “POWER DISTURBANCES WON’T HAPPEN TO YOU” ? ,[object Object],[object Object],[object Object]

MISCELLANEOUS ,[object Object],[object Object]

SUMMARY THINGS TO CONSIDER WHEN SPECIFYING A UPS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

D:\edtech 2\2006 0906 uninterruptible_power_supplies

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