The objectives of the project are to assist HTD (VAST) in improving and applying new control technologies for pilot fabrication of high efficient lighting products (LED and fluorescent lighting products), including:

a. Applying techniques of PFC (power factor correction) and PWM (pulse width modulation) to design and manufacture high-efficiency commercial ballasts and drivers for T8 and LED lamps (to be used in residential areas, offices, workshops, schools…). Based on this ground, supporting to manufacturers to create high efficient lighting products having enough quality for market competition.

b. Improving techniques for enhancing reliability and lifetime of LED lamp drivers, gradually applying automatic regulation technology of used power (dimming) to manufacture high-grade commercial lighting products.

On the science:

+ Completed a study on MOSFET’s thermal regime and improved technique solutions to reduce temperature of MOSFET in the LED lamp drivers with power lower 100W. 
+ Completed a study on improving technique solutions for ringing frequency tackling in the LED lamp drivers with power lower 100W.
+ Completed a pilot fabrication of 65 drivers and 65 sample LED lamps (incl. RL05, RL-19, RL-11 table LED lamps, ceiling LED lamps, bulb LED lamps, alley LED lamps, and floodlight LED lamps) (According to the co-operation program with Rang Dong Company).
+ Completed an assessement of stability and reliability of the mentioned sample LED lamps with the recommendation on improvement solutions.
+ Completed an assessement of optical specifications of the mentioned sample LED lamps with the recommendation on improvement solutions.
+ Completed a study on improvement of the mentioned sample drivers and sample LED lamps and completed the improvements.
+ Completed a development of the basis-level standards for table LED lamps, ceiling LED lamps, and alley LED lamps.
+ Completed a design of energy effcicient electronic ballasts for T8 fluorescent lamps with power factor (PF)>0.97, driver’s efficacy>92%, total energy losses of drivers <10%.
+ Manufactured 270 table LED lamps, ceiling LED lamps, bulb LED lamps, alley LED lamps, and floodlight LED lamps.
+ Manufactured 14,236 energy efficient T8 fluorescent lamps using the mentioned ballasts.

On the application:

+ Provided to local market 270 table LED lamps, ceiling LED lamps, bulb LED lamps, alley LED lamps, and floodlight LED lamps.
+ Two completed thematic reports have contributed to solving of a overheating problem in MOSFET, in particullar, and in switchings, in general, as well as compeling and controlling ringing oscillation at the switchings. As a result, the reliability, stability, and efficacy of the drivers have been increased.
+ Provided 14,236 energy efficient T8 fluorescent lamps to 1,200 classrooms at 150 schools of Thai Binh province under National Targeted Program on Energy Efficiency and Savings.

Some images of the project

First time, the designs of drivers for the LED lamps with power100W and electronic ballasts for T8 fluorescent lamps using PF and PWM techniques have been completed at the HTD. As a result, the PF is higher than 0.97, driver’s efficacy is higher than 92%, and the total driver’s energy losses are less than 10%.

150 schools of 5 districts in Thai Binh province.