03-7967 7351 umcic@um.edu.my



A novel transformer-less UPS is developed in this project. The proposed UPS use high gain bidirectional converter which operates between the dc-link voltage and battery bank. Using bidirectional charger/discharger, the battery bank is reduced to only two batteries in series, thus eliminating the disadvantage related to a series string of batteries. The bridgeless boost rectifier provides the regulated dc-link voltage to feed the inverter and maintain the power factor correction. A robust control scheme has been implemented for the inverter control which shows good performance against the non-linear and impulsive load.

The advantages:

  • Low cost 
  • Smaller volumetric size
  • Low weight
  • High efficiency
  • Low battery bank voltage
  • Simple control circuit
  • Less number of passive components
  • Low THD

Get the technology fact sheet here:

For any inquiries, kindly contact:

Lee Ching Shya

UMCIC Business Officer University of Malaya

Email: leecs@um.edu.my

Tel: +603-7967-7351/7352

Last Updated: 14/08/2019