Technique for sensing inductor and dc output currents of PWM dc-dc converter
- Hong Kong Polytechnic, Kowloon (Hong Kong). Dept. of Electronic Engineering
The design, analysis and trade-offs of a novel method to sense the inductor and dc output currents of PWM converters are presented. By sensing and adding appropriately the currents in the transistor, rectifier and capacitors of a converter using current transformers, the waveforms of inductor and dc output currents can be reconstructed accurately while maintaining isolation. This method offers high bandwidth, clean waveform, practically zero power dissipation and simple circuit. The technique is applicable to all PWM converters in both continuous and discontinuous modes, and is most suitable for the implementation of current mode control schemes like hysteretic, PWM conductance control, and output current feedforward. This approach has been experimentally verified at a wide range of current levels, duty cycles, and switching frequencies up to 1.4 MHz.
- OSTI ID:
- 6833441
- Journal Information:
- IEEE Transactions on Power Electronics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Power Electronics (Institute of Electrical and Electronics Engineers); (United States) Vol. 9:3; ISSN ITPEE8; ISSN 0885-8993
- Country of Publication:
- United States
- Language:
- English
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