An Analog Optimum Torque Control IC for a 200-W Wind Energy Harvesting System

Peng Chang Huang; Yeong Chau Kuo; Yi Chen Liu; Tai Haur Kuo

doi:10.1109/TCSII.2019.2893631

An Analog Optimum Torque Control IC for a 200-W Wind Energy Harvesting System

Peng Chang Huang, Yeong Chau Kuo, Yi Chen Liu, Tai Haur Kuo

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

An optimum torque (OT) control integrated circuit (IC) is implemented for harvesting the most available energy from a wind turbine generator (WTG) in a wind energy harvesting (WEH) system. For maximum power point tracking (MPPT), a rotor speed detector is proposed to obtain the root-mean-square (RMS) value of the WTG output voltage, which is proportional to the rotor speed. Then, three-phase current references are generated by multiplying the RMS value with the three-phase WTG output voltages for regulating the three-phase WTG output currents to achieve OT control. Further, a background calibration circuit is also implemented for adjusting the OT trajectory to maintain high MPPT efficiency. Moreover, to achieve a high power factor and low total current harmonic distortion (THD i), this brief applies three-phase carrier-based current sinusoidal PWM to drive a fully controlled boost rectifier. The chip is fabricated in 0.5-μm CMOS process with a 0.35-mm² chip area and measured with a WTG test rig designed to emulate the electrical output of a WTG. Measurement shows the proposed IC with fully controlled boost rectifier achieves 96.1% peak power conversion efficiency, 0.99 power factor, and 1.7% minimum THD i based on a 200-W WEH system. Compared with prior IC-implemented state-of-the-arts, this brief featuring well-designed circuit linearity has superior power conversion efficiency and THD i.

Original language	English
Article number	8616821
Pages (from-to)	1790-1794
Number of pages	5
Journal	IEEE Transactions on Circuits and Systems II: Express Briefs
Volume	66
Issue number	11
DOIs	https://doi.org/10.1109/TCSII.2019.2893631
Publication status	Published - 2019 Nov

All Science Journal Classification (ASJC) codes

Electrical and Electronic Engineering

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10.1109/TCSII.2019.2893631

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title = "An Analog Optimum Torque Control IC for a 200-W Wind Energy Harvesting System",

abstract = "An optimum torque (OT) control integrated circuit (IC) is implemented for harvesting the most available energy from a wind turbine generator (WTG) in a wind energy harvesting (WEH) system. For maximum power point tracking (MPPT), a rotor speed detector is proposed to obtain the root-mean-square (RMS) value of the WTG output voltage, which is proportional to the rotor speed. Then, three-phase current references are generated by multiplying the RMS value with the three-phase WTG output voltages for regulating the three-phase WTG output currents to achieve OT control. Further, a background calibration circuit is also implemented for adjusting the OT trajectory to maintain high MPPT efficiency. Moreover, to achieve a high power factor and low total current harmonic distortion (THD i), this brief applies three-phase carrier-based current sinusoidal PWM to drive a fully controlled boost rectifier. The chip is fabricated in 0.5-μm CMOS process with a 0.35-mm2 chip area and measured with a WTG test rig designed to emulate the electrical output of a WTG. Measurement shows the proposed IC with fully controlled boost rectifier achieves 96.1% peak power conversion efficiency, 0.99 power factor, and 1.7% minimum THD i based on a 200-W WEH system. Compared with prior IC-implemented state-of-the-arts, this brief featuring well-designed circuit linearity has superior power conversion efficiency and THD i.",

author = "Huang, {Peng Chang} and Kuo, {Yeong Chau} and Liu, {Yi Chen} and Kuo, {Tai Haur}",

year = "2019",

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N2 - An optimum torque (OT) control integrated circuit (IC) is implemented for harvesting the most available energy from a wind turbine generator (WTG) in a wind energy harvesting (WEH) system. For maximum power point tracking (MPPT), a rotor speed detector is proposed to obtain the root-mean-square (RMS) value of the WTG output voltage, which is proportional to the rotor speed. Then, three-phase current references are generated by multiplying the RMS value with the three-phase WTG output voltages for regulating the three-phase WTG output currents to achieve OT control. Further, a background calibration circuit is also implemented for adjusting the OT trajectory to maintain high MPPT efficiency. Moreover, to achieve a high power factor and low total current harmonic distortion (THD i), this brief applies three-phase carrier-based current sinusoidal PWM to drive a fully controlled boost rectifier. The chip is fabricated in 0.5-μm CMOS process with a 0.35-mm2 chip area and measured with a WTG test rig designed to emulate the electrical output of a WTG. Measurement shows the proposed IC with fully controlled boost rectifier achieves 96.1% peak power conversion efficiency, 0.99 power factor, and 1.7% minimum THD i based on a 200-W WEH system. Compared with prior IC-implemented state-of-the-arts, this brief featuring well-designed circuit linearity has superior power conversion efficiency and THD i.

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