INTRODUCTION

It has been found from practical experience that more than 90 percent of computer failure is due to power supply problems. Sophisticated equipment such as computer can not work on direct mains line. Voltage Sags, surges and spikes, frequency deviations, total power loss etc, will have a devastating effect on computers MAXX online UPS systems from Max Systems Private Limited, are based on the state-of-art technology incorporating High Frequency PWM ( Pulse Width Modulation) with IGBTs power module. The system is designed with sophisticated design resulting in compact, high efficiency, reliability, and long life. The UPS systems are designed especially for INDIAN CONDITIONS and are capable of handling input range from 150•270V, without consuming any powerfrom batteries.

PWM TECHNOLOGY:

MAXX online UPS system uses with highly reliable Pulse Width Modulation technique to give smooth waveform. The PWM technique, wherein the direct AC output is compared with the reference sinewave and instantaneous corrections in the output waveform are made whenever there is a sudden change in the load (non linear loads).

HIGH FREQUENCY SWITCHING.

High frequency switching of 20 KHz leads to high efficiency, low noise, and faster transient response. Pure sinewave output is generated with a total harmonic distortion of less than 3%. Faster switching leads to high regulation of less than 5% from no load to full load on a non-linear load.

HIGH FREQUENCY SWITCHING.

High frequency switching of 20 KHz leads to high efficiency, low noise, and faster transient response. Pure sinewave output is generated with a total harmonic distortion of less than 3%. Faster switching leads to high regulation of less than 5% from no load to full load on a non-linear load.

IGBT MODULES:

The use of highly reliable IGBT (Insulated Gate Bi-polar Transistor) gives compactness to the UPS systems. It increases the efficiency and reliability. High frequency switching using IGBTs leads to faster transient response.

LOW COST OPERATION:

High efficiency both at full and partial loads conserves power and reduces heat generation thus cutting down the electricity bill. Operational cost comparision between MAXX-IGBT based and conventional non-IGBT Systems.