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This paper investigates an economic and highly efficient power converter topology and its modulation scheme for 60kW buck-type rectifier system. The target system consists of three-phase three-switch buck-type rectifier topology. A new Carrier Based PWM scheme along with its simple implementation using logic gates is introduced. This PWM scheme replaces the diode rectifier equivalent switching state...
This paper considers a unique type of multitude DC/DC conversion ratios switched capacitor converter. The multitude conversion ratios enable the converter to be able to be almost continuous and competitive to inductive based converters. The paper summarizes the basic rules of the topology as well as presenting two possible ways of implementing the topology. The paper also discusses the difference...
Available fractional-order PIλDμ controllers introduced in the literature use discrete component realizations, where the approximations of fractional-order integration and differentiation operations is performed using appropriately configured RC networks. A novel re-configurable fractional-order PIλ controller, suitable for brake and throttle control in an autonomous vehicle, is presented in this...
A low-voltage, ultra-low power sensor interface for electromyogram (EMG) signal acquisition is presented. The sensor interface consists of an amplifier and a SAR ADC that work from a 0.3V supply. The low-voltage amplifier topology provides a noise level of 26μVrms, 40dB gain and a state-of the art power efficiency factor (PEF) of 2.2 from a 20–425Hz bandwidth. Low-voltage supply improves the power...
In this paper, a new area-effective complex-filter topology which can be used as an image-reject filter in low-IF receiver is proposed. A first-order image-reject filter obtained according to a new topology which corresponds to a complex shunt RC circuit. To demonstrate the usefulness of filter, simulation results of the filter are obtained by using SPECTRE in the CADENCE design tool.
The paper proposes a simple and novel technique for driving a silicon carbide power MOSFET using silicon power MOSFET driver IC and single unipolar supply voltage. In the proposed technique, a unipolar supply voltage is given to the driver IC and split by an RC divider network for obtaining an intermediate reference point which is connected to the source terminal of the SiC MOSFET. The gate terminal...
The front-end amplifier forms the critical element for signal detection and pre-processing within neural monitoring systems. It determines not only the fidelity of the biosignal, but also impacts power consumption and detector size. In this paper, a combined feedback loop-controlled approach is proposed to neutralize for the input leakage currents generated by low noise amplifiers when in integrated...
The paper presents a multilevel cascaded H-bridge 5-level converter with boosting capability. Standard solution for boosting voltage in power electronic devices is utilization of a dc-dc converter with a bulky inductor. However, inductor is a problematic component of a power electronic converter because usually it needs to be individually designed and produced for every device and also because its...
A new topology of multi-string single-stage unidirectional Inverter with high frequency AC-Link and soft switching ability has been introduced in this paper. This inverter has the ability of connecting several PV strings with different levels of voltage and currents to the AC grid. Moreover it has the ability of individual Maximum-Power-Point-Tracking (MPPT) for different PV strings that works in...
With the goal of deducing the requirement of dc voltage and active power losses, a new topology structure of static synchronous compensator (STATCOM) in order to improve its performance is presented. The new topology changes the property of fundamental-frequency impedance by connecting capacitor in traditional ac branch, and its reactive power compensation theory, parameter selection method and decoupling...
The flying capacitors (FCs) of the nested neutral-point-clamped (NNPC) converter show an inherent voltage ripple at fundamental frequency. This ripple can be significantly large under some operating conditions of the converter. In this paper, the amplitudes of the low-frequency voltage ripples in the FCs are determined. An averaged model of the NNPC converter is introduced and used in the analysis...
In this paper, a new circuit is proposed for step-up Z-source inverter based on QZSI (quasi-Z-source inverter). The proposed topology inherits all advantages of the conventional topology. The proposed topology in comparison with conventional topology reduces the ST (Shoot-through) duty cycle by over 25% at the same voltage boost factor. Theoretical analysis of the proposed qZSI in the ST and non-ST...
This paper presents a detailed state-space modeling of a Modular Multilevel Converter (MMC) in combination with line frequency transformer (LFT). The classical MMC topology is compared with the recently proposed Open-End Winding MMC (OEWMMC) topology, which integrates the LFT in the converter arm. The line frequency transformer parameters are added in the model, some of which are often neglected in...
In a single-phase grid-connected nanogrid system, a bidirectional AC-DC converter is usually required to transfer energy between the AC grid and a DC bus. However, a ripple power at twice the grid frequency may be injected from the AC grid into the DC bus if the ripple power is not properly compensated. In this paper, a family of bidirectional single-phase AC-DC three-phase-leg PWM converters for...
The effects of high-frequency modulation applied to Modular Multilevel Cascade Converter (MMCC) with Double-Star Chopper-Cells (DSCC) can produce high-frequency components across the arm inductors, which are reflected in the DC-link when no common DC-link capacitor is used. The switch-count reduction can be a cost-effective solution in processes of power conversion. This work presents two hybrid single-phase...
A floating H-Bridge converter is proposed to stabilize the automotive energy net against undesired voltage spikes and to limit the voltage range for the electrical loads. In comparison to classical converter topologies the proposed floating H-Bridge converter with integrated energy storage device provides lower switch-voltage stress and allows therefore the implementation of high-current low-voltage...
In this paper, we propose a distributed cooperative voltage equalization strategy in order to balance the voltages of the series-connected super-capacitors, which is the power supply of energy storage light rail vehicles. Taking each supercapacitor cell as an agent in multi-agent systems, the voltage equalization problem can be formulated as a cooperative tracking problem. The sparse communication...
A new pulse width modulation (PWM) strategy which is an alternative approach of the discontinuous PWM (DPWM) for a three-level neutral-point-clamped (NPC) inverter is proposed in this paper. A three-level NPC inverter is completely mature and very well established topology in high-power applications. However, the three-level NPC inverter has the inherent problem of neutralpoint voltage unbalancing...
This paper proposes the use of voltage-doubling diode rectifier in the output stage of the zero-voltage-switching active-clamping current-fed half-bridge isolated DC-DC converter and presents a comparison with the classic diode full-bridge rectifier. The design methodology was revised to include the voltage-doubling rectifier and lower side clamp capacitor connection. Two converters (diode bridge...
Paper presents topology of the three wire DC microgrid equipped in adjustable speed generation system with high power boost rectifier that has ability to draw sinusoidal current from the permanent magnet generator and also has a connection to the AC system. The variable speed generator produces variable frequency and amplitude so a controllable rectifier that stabilizes DC output voltage is required...
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