Journal ArticleDOI
Single-Phase Grid-Connected Motor Drive System With DC-Link Shunt Compensator and Small DC-Link Capacitor
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TLDR
In this paper, a dc-link shunt compensator (DSC) was proposed to improve the performance of a single-phase diode rectifier with small DC-link capacitors.Abstract:
The single-phase diode rectifier system with small dc-link capacitor shows wide diode conduction time and it improves the grid current harmonics. By shaping the output power, the system meets the grid current harmonics regulation without any power factor corrector or grid filter inductor. However, the system has torque ripple and suffers efficiency degradation due to the insufficient dc-link voltage. To solve this problem, this paper proposes the dc-link shunt compensator (DSC) for small dc-link capacitor systems. DSC is located on dc-node in parallel and operates as voltage source, improving the system performances. This circuit helps the grid current-shaping control during grid-connection time, and reduces the flux-weakening current by supplying the energy to the motor during grid-disconnection time. This paper presents a power control method and the design guideline of DSC. The feasibility of DSC is verified by simulation and experimental results.read more
Citations
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Journal ArticleDOI
Inverter Power Control Based on DC-Link Voltage Regulation for IPMSM Drives Without Electrolytic Capacitors
TL;DR: In this paper, an inverter power control strategy based on dc-link voltage regulation for the electrolytic capacitor-less interior permanent magnet synchronous motor drive system was proposed, which achieved high input power factor and low grid current harmonics.
Journal Article
A Power Decoupling Method Based on Four Switch Three-Port DC/DC/AC Converter in DC Microgrid
K. Rajasekaran,V. Karthikeyan +1 more
TL;DR: In this paper, a power decoupling approach using a four-switch three port DC/DC/AC converter in a DC microgrid is described, where the power flow control technique is used so that the converter is decoupled to obtain low frequency ripple power.
Journal ArticleDOI
Inductor Current Feedback Active Damping Method for Reduced DC-Link Capacitance IPMSM Drives
TL;DR: In this article, an active damping method based on the virtual damping resistor is applied to suppress the LC resonance and improve the drive system stability in a reduced dc-link capacitance motor drive system.
Journal ArticleDOI
Overmodulation Strategy for Electrolytic Capacitorless PMSM Drives: Voltage Distortion Analysis and Boundary Optimization
TL;DR: A novel overmodulation strategy named as the optimized voltage boundary-based overmodulated strategy is proposed to reduce the distortion of the stator voltage and current and demonstrates its effectiveness on a PMSM drive platform.
Journal ArticleDOI
Impedance Based Stabilization Control Method for Reduced DC-Link Capacitance IPMSM Drives
TL;DR: The impedance model of the drive system is established considering the dc-link voltage fluctuation, which is applied to evaluate theDrive system stability and the grid current harmonics issue could also be analyzed by the grid input impedance model.
References
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Proceedings ArticleDOI
Control strategy for a three-phase to single-phase power converter using an active buffer with a small capacitor
Yoshiya Ohnuma,Jun-ichi Itoh +1 more
TL;DR: In this paper, a three-to-single-phase power converter that allows for smaller smoothing capacitors in the DC link is proposed, and the experimental results indicate that for a 1kW-class prototype circuit, the power ripple at twice the frequency of the power supply can be adequately suppressed using a buffer capacitor of only 50µF.
Proceedings ArticleDOI
Input current harmonics reduction control for electrolytic capacitor less inverter based IPMSM drive system
TL;DR: This paper proposes a current harmonics reduction method to improve the input current waveform of electrolytic capacitor less single-phase to three-phase power converters and results confirm that the proposed control method clears the guideline EN61000-3-2.
Patent
Power converter and its control method
TL;DR: In this article, a power converting apparatus and method includes a converter for converting AC power from a commercial power supply into DC power, a smoothing unit for smoothing the DC power from the converter, an inverter for converting an output of the smoothing units into another AC power, and a current detector for detecting an output current of the inverter and providing a signal indicative thereof.
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