@article{Jintanawan2020,

title = {Design of kinetic-energy harvesting floors},

author = {T Jintanawan and G Phanomchoeng and S Suwankawin and P Kreepoke and P Chetchatree and C U-Viengchai},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85093104729&doi=10.3390%2fen13205419&partnerID=40&md5=9fe5b8d9ea1761032d0ebec4120c106e},

doi = {10.3390/en13205419},

issn = {19961073},

year  = {2020},

date = {2020-01-01},

journal = {Energies},

volume = {13},

number = {20},

publisher = {MDPI AG},

abstract = {Alternative energy generated from people’s footsteps in a crowded area is sufficient to power smart electronic devices with low consumption. This paper aims to present the development of an energy harvesting floor—called Genpath—using a rotational electromagnetic (EM) technique to generate electricity from human footsteps. The dynamic models of the electro-mechanical systems were developed using MATLAB®/Simulink to predict the energy performances of Genpath and help fine-tune the design parameters. The system in Genpath comprises two main parts: the EM generator and the Power Management and Storage (PMS) circuit. For the EM generator, the conversion mechanism for linear translation to rotation was designed by using the rack-pinion and lead-screw mechanism. Based on the simulation analysis, the averaged energy of the lead-screw model is greater than that of the rack-pinion model. Thus, prototype-II of Genpath with 12-V-DC generator, lead-screw mechanism was recently built. It shows better performance when compared to the previous prototype-I of Genpath with 24-V-DC-generator, rack-pinion mechanism. Both prototypes have an allowable displacement of 15 mm. The Genpath prototype-II produces an average energy of up to 702 mJ (or average power of 520 mW) per footstep. The energy provided by Genpath prototype-II is increased by approximately 184% when compared to that of the prototype-I. The efficiency of the EM-generator system is ~26% based on the 2-W power generation from the heel strike of a human’s walk in one step. Then, the PMS circuit was developed to harvest energy into the batteries and to supply the other part to specific loads. The experiment showed that the designed PMS circuit has the overall efficiency of 74.72%. The benefit of the design system is for a lot of applications, such as a wireless sensor and Internet of Thing applications. © 2020 by the authors.},

note = {cited By 1},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Pipattanasomporn2020,

title = {CU-BEMS, smart building electricity consumption and indoor environmental sensor datasets},

author = {M Pipattanasomporn and G Chitalia and J Songsiri and C Aswakul and W Pora and S Suwankawin and K Audomvongseree and N Hoonchareon},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85088245691&doi=10.1038%2fs41597-020-00582-3&partnerID=40&md5=f4429e29617970d1a17b92a27f26ec05},

doi = {10.1038/s41597-020-00582-3},

issn = {20524463},

year  = {2020},

date = {2020-01-01},

journal = {Scientific Data},

volume = {7},

number = {1},

publisher = {Nature Research},

abstract = {This paper describes the release of the detailed building operation data, including electricity consumption and indoor environmental measurements, of the seven-story 11,700-m2 office building located in Bangkok, Thailand. The electricity consumption data (kW) are that of individual air conditioning units, lighting, and plug loads in each of the 33 zones of the building. The indoor environmental sensor data comprise temperature (°C), relative humidity (%), and ambient light (lux) measurements of the same zones. The entire datasets are available at one-minute intervals for the period of 18 months from July 1, 2018, to December 31, 2019. Such datasets can be used to support a wide range of applications, such as zone-level, floor-level, and building-level load forecasting, indoor thermal model development, validation of building simulation models, development of demand response algorithms by load type, anomaly detection methods, and reinforcement learning algorithms for control of multiple AC units. © 2020, The Author(s).},

note = {cited By 2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Saatwong202011,

title = {An interoperable building energy management system with ieee1888 open protocol for peak-load shaving},

author = {P Saatwong and S Suwankawin},

url = {https://ieeexplore.ieee.org/document/8961104},

doi = {10.1109/OJIA.2020.2967185},

issn = {2644-1241},

year  = {2020},

date = {2020-01-01},

journal = {IEEE Open Journal of Industry Applications},

volume = {1},

pages = {11-22},

abstract = {A peak-load shaving application is implemented for a Building Energy Management System (BEMS). The IEEE1888 open protocol is adopted to facilitate interoperability capability through the TCP/IP network. The data structure is determined by the Facility Information Access Protocol (FIAP). The operation of equipped Battery Energy Storage System (BESS) is optimized from the analytical load-forecast model and also takes the power and energy ratings of the battery into consideration. The peak-load-shaving application is developed with 15-minute on-line processing. The real-world BEMS is demonstrated by a test-bed building at university. Thanks to the IEEE1888 open protocol, the common interface for the gateway, data storage, and peak-shaving application can be achieved. Experimental results are gathered from 2-week testing and the feasibility of IEEE1888-based interoperable BEMS is validated. The optimized control of a 5.76 kW/11.52 kWh BESS is examined accordingly, and up to 6.99% of peak demand is successfully deducted.},

note = {cited By 2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Srivorakul2018,

title = {A Synchro-Perspective-Based High-Frequency Voltage Injection Method for Position-Sensorless Vector Control of Doubly Fed Induction Machines},

author = {A Srivorakul and S Suwankawin},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85042710824&doi=10.1109%2fTIA.2018.2808933&partnerID=40&md5=217f17f9ea2cc8e2b6dce9e6f0d7d4d8},

doi = {10.1109/TIA.2018.2808933},

issn = {00939994},

year  = {2018},

date = {2018-01-01},

journal = {IEEE Transactions on Industry Applications},

volume = {54},

number = {4},

pages = {3326-3337},

publisher = {Institute of Electrical and Electronics Engineers Inc.},

abstract = {In this paper, a novel salient autonomous high-frequency (HF) signal injection method of sensorless drive for doubly fed induction machines (DFIM) is proposed. The HF voltage is injected into the rotor winding, and according to the concept of synchro, the rotor position can be simply extracted from the phase difference among the stator current and the rotor current regardless of machine and grid parameters. In addition, the proposed scheme is robust against the disturbance of HF stator voltage propagated from the grid. The vector phase-locked loop (PLL) technique is employed to calculate rotor position and rotor speed simultaneously, and the global stability of the PLL is mentioned. The tracking performances during acceleration and deceleration, and sinusoidal perturbation are investigated. The feasibility of the proposed concept is verified by the experimental results with a 4-kW DFIM drive. The performances of the drive system are evaluated in various operating conditions, e.g., subsynchronous, synchronous and supersynchronous speeds, voltage sag, and flying start. © 1972-2012 IEEE.},

note = {cited By 4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Mekkemthong2011,

title = {Reduction of torque ripple and mechanical vibration of spindle motors in hard-disk drives using a sinusoidal driver},

author = {P Mekkemthong and K Chiangchin and S Suwankawin},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-80755135416&doi=10.1007%2fs00542-011-1343-6&partnerID=40&md5=44ad49b9b6ce77a7331e1ba7d0473c82},

doi = {10.1007/s00542-011-1343-6},

issn = {09467076},

year  = {2011},

date = {2011-01-01},

journal = {Microsystem Technologies},

volume = {17},

number = {10-11},

pages = {1645-1652},

abstract = {Mechanical vibration and acoustic noise are major obstacles in the development of high-density and high-spindle-speed hard disk drives. Torque ripple caused by the electrical driver is the main source of vibration and noise. This paper proposes a novel driver for spindle motors in hard disk drives based on the principle of position sensorless vector control. To reduce torque ripple, the proposed driver feeds the spindle motor in sinusoidal driving mode by which the sinusoidal current of the motor can be obtained. Experimental results of the proposed driver demonstrate the better driving performance in startup condition and fine sinusoidal current in steady state. Vibration testing shows significant improvement in the attenuation of vibration: the dominant vibration modes can be reduced to one tenth compared to that of a conventional driver. In addition, the mechanism of inducing torque ripple from time-harmonic currents is analyzed and the relationship between induced torque ripple and exhibited vibration modes is examined. © 2011 Springer-Verlag.},

note = {cited By 0},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Jintanawan2010,

title = {Exploration of vibro-acoustic characteristics of HDD spindle motors using electro-magnetic frequency-swept excitation},

author = {T Jintanawan and A Sillapapinij and S Suwankawin},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-72149132054&doi=10.1007%2fs00542-009-0778-5&partnerID=40&md5=455119eeb0a3b8af3938bd42c6b572a8},

doi = {10.1007/s00542-009-0778-5},

issn = {09467076},

year  = {2010},

date = {2010-01-01},

journal = {Microsystem Technologies},

volume = {16},

number = {1-2},

pages = {187-194},

abstract = {In this paper, an approach of modal testing to investigate the vibro-acoustic characteristics of a three-phase motor with fluid dynamic bearings used in hard disk drives (HDD) is proposed. The motor is excited by varying the frequency of the electrical current input on one of the three phases to ensure constant amplitudes of electro-magnetic (EM) excitations for all various audible frequencies. Compared with the conventional mechanical excitation, the EM excitation is more relevant to the actual EM forces which are the major source of acoustic noises in the motor operation. With the proposed EM-excitation method, the frequency response functions (FRFs) between the measured mechanical vibrations at exterior of the motor structure and the motor current input were obtained with good repeatability. The vibro-acoustic resonances of the motor and their corresponding mode shapes were determined from both the experimental FRFs and the sound spectra of the running motor. The results clearly show the critical vibro-acoustic modes that induce the acoustic noises in HDD motor. © 2009 Springer-Verlag.},

note = {cited By 4},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Pairodamonchai2009,

title = {Design and implementation of a hybrid output EMI filter for high-frequency common-mode voltage compensation in PWM inverters},

author = {P Pairodamonchai and S Suwankawin and S Sangwongwanich},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-70349969849&doi=10.1109%2fTIA.2009.2027352&partnerID=40&md5=fa0ef78aa980a6adff01cb57ae792173},

doi = {10.1109/TIA.2009.2027352},

issn = {00939994},

year  = {2009},

date = {2009-01-01},

journal = {IEEE Transactions on Industry Applications},

volume = {45},

number = {5},

pages = {1647-1659},

abstract = {This paper presents a hybrid output electromagnetic interference (EMI) filter for common-mode voltage compensation in pulsewidth-modulation (PWM) inverters. Its structure is composed of a single-leg four-level active filter connected in series with a low-frequency blocking capacitor and a small passive LC filter that which enhances the suppression of the common-mode voltage in the high-frequency range. The series capacitor helps in avoiding the core saturation of the common-mode coupling transformer caused by the low-frequency components of the common-mode voltage. Detection of PWM voltages by high-speed optoisolators is done at the inverter's output to achieve better common-mode voltage detection and compensation characteristics. Analysis and design guidelines for the hybrid filter are also given to facilitate systematic design in the real implementation of the filter. Experimental results with a real drive system clearly illustrate a significant reduction of the common-mode voltage, the leakage current, the shaft voltage, and the bearing current. © 2009 IEEE.},

note = {cited By 80},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Suwankawin2006,

title = {Design strategy of an adaptive full-order observer for speed-sensorless induction-motor drives - Tracking performance and stabilization},

author = {S Suwankawin and S Sangwongwanich},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-32644447363&doi=10.1109%2fTIE.2005.862308&partnerID=40&md5=312f6937f85eb4b4130fe62ce0b8f34d},

doi = {10.1109/TIE.2005.862308},

issn = {02780046},

year  = {2006},

date = {2006-01-01},

journal = {IEEE Transactions on Industrial Electronics},

volume = {53},

number = {1},

pages = {96-119},

abstract = {Design strategy of both feedback gains and adaptation gains for an adaptive full-order observer is a necessary issue to assure the stability and the tracking performance of the speed estimation in the sensorless drives. In this paper, novel design of feedback gains of the observer is proposed to achieve the stability over the whole operation especially in the low-speed region, including the regenerating mode. Stability improvement using the proposed feedback gains is rigorously proven by the method of Lyapunov. For the adaptation proportional - integral (PI) gains, the ramp response characteristic of the speed estimator is proposed as design guidelines. It is revealed that the integral adaptation gain determines the tracking error of the speed estimator during acceleration/deceleration while the sensitivity to current measurement noises depends on the proportional adaptation gain. It is also pointed out that a suitable corner frequency of the adaptation PI gains is required as a design tradeoff to avoid an oscillation. The validity of all theoretical results is verified by simulation and experiment. © 2006 IEEE.},

note = {cited By 162},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Suwankawin2002,

title = {A speed-sensorless IM drive with decoupling control and stability analysis of speed estimation},

author = {S Suwankawin and S Sangwongwanich},

url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036543772&doi=10.1109%2f41.993278&partnerID=40&md5=093fdc7e6bd7ff92e5af77a7b6a9fd1e},

doi = {10.1109/41.993278},

issn = {02780046},

year  = {2002},

date = {2002-01-01},

journal = {IEEE Transactions on Industrial Electronics},

volume = {49},

number = {2},

pages = {444-455},

abstract = {A new sensorless drive based on a decoupling control and an adaptive full-order observer is developed. A modified decoupling control is introduced and integrated with the adaptive observer to reduce the complexity of the whole system. The speed estimation based on adaptive control theory is analyzed and the necessary and sufficient conditions for stability of the speed estimation are analytically derived. It is indicated that the system can be unstable in the low-speed region with regenerative loads. However, assigning an appropriate feedback gain to the adaptive observer can restore the stability and reduce the unstable region. Sensitivity of the sensorless drive against parameter and measurement errors is also qualitatively discussed. Simulation and experimental results are then given to verify the validity of the theoretical results.},

note = {cited By 125},

keywords = {},

pubstate = {published},

tppubtype = {article}

}