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This paper proposes a Current Deadbeat Control (DBC) algorithm for a three-phase 9-cells qZS based Cascaded H-Bridge (CHB) inverter to ensure grid current supply with low THD. The studied topology is considered as a single-stage DC/AC topology having the capability of boosting the DC input voltage with high-quality multilevel AC voltage, independent DC-link voltage compensation, and control of the...
This paper proposes a novel nonlinear multi-loop control method for the coordinated control of the Unified Power Flow Controller (UPFC) using high gain state and perturbation observers (HGSPO). The UPFC is decoupled into four independent subsystems. The optimal output feedback control of each subsystem is achieved with the estimates of states and perturbations obtained by the HGSPO. A four-loop nonlinear...
This paper presents a stand-alone ship shaft generator system based on brushless doubly-fed machine (BDFM). In this system, the output voltage amplitude and frequency of BDFM are kept constant under variable rotor speed and load by regulating the control winding (CW) excitation current of BDFM appropriately. The control scheme is proposed, and the hardware design for the control system is developed...
This paper presents several addvanced error compensation and bias self-calibration techniqques based on an extended gyro error model. The techhniques were implemented on a MEMS Disc Resonator Gyro (DRG). Preliminary test data shows the evidence off a promising navigational grade MEMS gyro.
In this paper, Voltage Source Inverters (VSI) are considered to drive a single-phase electric machine as a motor for propulsion of Light Electric Vehicles (LEV). The proposed gain space tuning method in this study uses the Linear Quadratic Regulator (LQR) concept in which the desired sets of the Q matrix of the LQR are obtained based on the dominant closed-loop poles concept and in a reverse mathematical...
The electric motor drive system is one of the most important portions of an Electric Vehicle (EV) where the electric motor is supplied by a Voltage Source Inverter (VSI) as an option which is frequently used in single- and three-phase powertrain configurations. This paper illustrates a new method for VSI linear controller coefficient tuning that ensures tracking of the output voltage versus applied...
This paper addresses the utilization of a rapid-prototyping control methodology coupled with a real-time digital simulator to facilitate the instantiation of a 10kW multilevel neutral point clamped (NPC) converter. Multi-level converters offer a wide range of benefits due to their ability to synthesize waveforms with less quantization, resulting in lower THD; and the ability to reduce device stress...
In this paper, a predictive dead-beat proportional-integral (PI) current control algorithm is studied for shunt active power filters (APFs). To investigate the effectiveness of the proposed control scheme a digital control based simulation model is built using commercially available VisSim software. Performance comparison with different control schemes are carried out. Excellent performance of active...
A low noise amplifier with dB-linear variable gain has been designed and fabricated based on high performance SiGe HBT in this paper. Negative feedback technology has been adopted to change the transmission gain of HBT through variable resistance of a forward biased p-i-n diode in the feedback path. The simulation results and measurement results agree well in frequency of 1.8GHz for CDMA application...
In this paper a compact model both for bipolar and unipolar resistive switching device is proposed. Basic I-V characteristics of RRAM are easily and correctly represented by this model. The model is verified by the bipolar RRAM experiment results. The model can be used as simple and fast tool to design and optimize RRAM.
SRAM cells with Vth-controllable independent double-gate (IDG) FinFETs have been successfully fabricated. The performance of the fabricated SRAM cell with various circuit topologies has been investigated comprehensively. Both a reduction of leakage current and an enhancement of read and write noise margins have been successfully demonstrated by introducing the IDG FinFETs into the SRAM cells.
Distributed generation can have an impact on distribution feeder voltage regulation, and distributed solar photovoltaics (PV) are no exception. As the penetration level of solar PV rises over the coming decades, reverse power flow on the distribution feeder will happen more frequently and the associated voltage rise might lead to violations of voltage boundaries defined by ANSI C84.1. The severity...
This paper describes a highly efficient, high power density converter generating 3.3VDC from a 390VDC input, for use in a proposed power distribution architecture with a reduced number of conversion stages, which increases system efficiency. Key design considerations, theoretical and experimental results are presented for the LLC resonant converter.
This paper presents the application of a fuzzy logic controlled particle swarm optimization (FLCPSO) to reactive power and voltage control (Volt/VAR control or VVC) considering voltage stability. An improved particle swarm optimization with three fuzzy controllers based on some heuristics is proposed to adaptively adjust the parameters of PSO, such as the inertia weight and learning factors, during...
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