Grid Inertia Support Enabled by Smart Loads The increasing penetration of renewable energy resources (RESs) leads to a continuous displacement of synchronous generators. Since the grid integration of RESs is usually achieved through inertialess power converters, the system inertia reduces and the power system frequency stability is compromised. Consequently, unexpected generator tripping, load shedding, and […]
Analysis of Sector Update Delay and Its Effect on Digital Control Three-Phase Six-Switch Buck PFC Converters With Wide AC Input Frequency In this article, the sector update delay (SUD) of the digital control three-phase six-switch (3 ph-6 s) buck power factor correction (PFC) converter is analyzed. SUD of 3 ph-6 s buck PFC converter results […]
Analytical Model to Study Hard Turn-off Switching Dynamics of SiC mosfet and Schottky Diode Pair Fast switching transient of SiC mosfet may lead to prolonged oscillations, spurious turn on, large device stress, and high amount of electromagnetic interference generation. For an optimal layout and gate driver design, study of switching dynamics is important. This article […]
Zero-Voltage-Switching Single-Phase Full-Bridge Inverter With Active Power Decoupling Single-phase zero-voltage-switching (ZVS) inverter with wide bandgap devices has higher efficiency and power density. However, the dc-side capacitor of the inverter will suffer double line frequency ripple and reduces the lifetime of the dc bus capacitor. Active power decoupling (APD) is an effective method to replace the […]
The wide adoption of a new type of electric trains results in multiple frequency-scale instability problems, such as low-frequency oscillation (LFO), harmonic resonance, and harmonic instability. Among them, LFO has been commonly reported at electric railway depots with multiple-energized electric trains around the whole world, thus attracting widespread research attention. LFOs cause adverse effects on […]
Investigation of the Power Factor of Magnetic-Field Modulated Brushless Double-Rotor Machine The magnetic-field modulated brushless double-rotor machine (MFM-BDRM), getting rid of brush and slip ring, is a preferable selection for the power splitting device in hybrid electric vehicles. In practical application, however, the MFM-BDRM is facing the challenge of low power factor owing to its […]
An Isolated Bidirectional Microinverter Based on Voltage-in-Phase PWM-Controlled Resonant Converter A single-stage single-phase isolated bidirectional microinverter based on a voltage-in-phase pulsewidth modulation (VIP-PWM)-controlled resonant converter is proposed in this article. With the VIP-PWM control, the voltage conversion ratio of the resonant converter can be regulated from zero to infinity, theoretically, which means the VIP-PWM is […]
A Self-Compensated Planar Coil for Resonant Wireless Power Transfer Systems Compensation capacitors are important components of any resonant wireless power transfer (RWPT) systems and significantly affect the output power, operating frequency, and efficiency. Depending on the compensation network, these capacitors can be placed in series or parallel with the coils. The physical capacitor reduces reliability […]
Review of Hybrid Multilevel Converter Topologies Utilizing Thyristors for HVDC Applications Hybrid multilevel converters using bidirectional thyristors and IGBTs have gained significant interest in recent times, as they possess important features of both voltage-source and line-commutated converter technologies. This article presents a classification of hybrid multilevel converters for HVdc applications. The methodologies to derive, evaluate, […]
New Three-Phase Current Reconstruction for PMSM Drive With Hybrid Space Vector Pulsewidth Modulation Technique Current sensing techniques with reduced number of sensors attract a high interest from industry, for the possibility of cost reduction and sampling mismatch reduction. This article puts forward a new single current sensor (SCS) method for a permanent magnet synchronous motor […]