By Topic

Transformer-coupled direct base drive technology for high-power, high-voltage, bipolar transistor PWM converters

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Swanepoel, P.H. ; Energy Lab., Rand Afrikaans Univ., Johannesburg, South Africa ; Van Wyk, J.D. ; Schoeman, J.J.

The drive requirements of large high-voltage bipolar power transistors as applied in pulsewidth modulation (PWM) converters and the fundamentally different topologies for efficient high-power transformer-coupled base drives delivering up to 100 A are discussed. Possibilities for high-power base drives with a single transformer were examined, and the limitations of high-efficiency pulsed direct base drives are discussed. The main disadvantage of all pulsed transformer-coupled drives is the absence of continuous negative base-emitter voltage. This is essential in PWM applications in high-voltage converters, and transformer-coupled drives require carrier wave systems. The high-frequency carrier wave system as optimal topology for high-power transformer-coupled direct base drives is analyzed. The different base drive topologies are evaluated in terms of capability, losses, component count, and physical size. Some aspects of the design of a 1 MHz carrier wave transformer-coupled base drive are discussed and experimental results, including efficiency, are shown

Published in:

Industry Applications, IEEE Transactions on  (Volume:25 ,  Issue: 6 )