Abstract
A plus and minus switching power supply is needed for many applications, for example an audio power supply. Since the changes in the output voltage of such loaded power amplifiers are large, the voltage of the power supply is also subject to large changes. In order to suppress these changes, a capacitor with a large capacity is usually used at the output end. If the capacities are reduced, the power supplies can be compacted. In this article, we show that the capacities can be reduced by using robust digital control using approximately 2DOF. The resulting controller is actually implemented on a digital signal processor (DSP). We show from experiments that the power supplies can be compacted by a robust controller.
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References
Higuchi K, Nakano K, Araki K, et al (2002) New robust control of PWM power amplifier. IFAC 15th Triennial World Congress (CD-ROM), July 2002
Kanai T, Higuchi K, Nakano K, et al (2007) Compact size of audio power supply using robust control. SICE 7th Annual Conference on Control Systems, March 2007, p 62-1–2
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This work was presented in part at the 16th International Symposium on Artificial Life and Robotics, Oita, Japan, January 27–29, 2011
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Saitoh, A., Tsuruhori, Y., Ohta, Y. et al. Regulated plus and minus power supply using approximately 2DOF robust digital control. Artif Life Robotics 16, 65–69 (2011). https://doi.org/10.1007/s10015-011-0886-z
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DOI: https://doi.org/10.1007/s10015-011-0886-z