Precision rectifier

About: Precision rectifier is a research topic. Over the lifetime, 4952 publications have been published within this topic receiving 63668 citations. The topic is also known as: super diode.

A CMOS integrated voltage and power efficient AC/DC converter for energy harvesting applications

Abstract: In this paper, a fully CMOS integrated active AC/DC converter for energy harvesting applications is presented. The rectifier is realized in a standard 0.35 µm CMOS process without special process options. It works as a full wave rectifier and can be separated into two stages—one passive and one active. The active part is powered from the storage capacitor and consumes about 600 nA at 2 V supply. The input voltage amplitude range is between 1.25 and 3.75 V, and the operating frequency range is from 1 Hz to as much as several 100 kHz. The series voltage drop over the rectifier is less than 20 mV. Measurements in combination with an electromagnetic harvester show a significant increase in the achievable output voltage and power compared to a common, discrete Schottky diode rectifier. The measured efficiency of the rectifier is over 95%. Measurements show a negligible temperature influence on the output voltage between −40 °C and +125 °C.

A 4-kW 42-V induction-machine-based automotive power generation system with a diode bridge rectifier and a PWM inverter

Abstract: In recent years, the electrical load demand in automobiles has been increasing steadily due to the usage of several subsystems to improve engine performance, passenger comfort and safety. The current production Lundell alternator is not able to meet the future growing power demand due to its inherent design limitations. Therefore, an efficient, high power generation system is needed to meet the growing electric power demand in automobiles. The recent trend to adopt the 42 V power system in automobiles allows one to add more subsystems in an efficient way. In this paper, a three-phase, 42 V, 4 kW, induction machine based automotive power generation scheme is proposed to meet the future electrical power demand in automobiles. This scheme uses a low cost diode bridge rectifier directly connected to the induction machine to transfer active power to the battery and the load. The excitation to the machine is supplied by means of a low power PWM inverter to control the output voltage of the generator connected to the diode bridge rectifier. This paper presents a new control methodology to regulate the output voltage of an induction generator directly connected to a diode bridge rectifier by controlling the auxiliary PWM inverter. The simulated performance results of a 4 kW, 42 V induction generator scheme at various speeds and loads are presented.

Swiss rectifier — A novel three-phase buck-type PFC topology for Electric Vehicle battery charging

Abstract: This paper introduces a novel three-phase buck-type unity power factor rectifier appropriate for high power Electric Vehicle battery charging mains interfaces. The characteristics of the converter, named the Swiss Rectifier, including the principle of operation, modulation strategy, suitable control structure, and dimensioning equations are described in detail. Additionally, the proposed rectifier is compared to a conventional 6-switch buck-type ac-dc power conversion. According to the results, the Swiss Rectifier is the topology of choice for a buck-type PFC. Finally, the feasibility of the Swiss Rectifier concept for buck-type rectifier applications is demonstrated by means of a hardware prototype.

Space Vector Modulation for Vienna-Type Rectifiers Based on the Equivalence between Two- and Three-Level Converters: A Carrier-Based Implementation

Abstract: This paper presents the equivalence between two- and three-level converters for the Vienna rectifier, proposing a simple and fast space vector modulator built on this principle. The algorithm is further simplified by deriving its carrier-based equivalent implementation, which enables the midpoint voltage control by adjusting the ratio between redundant vectors, while also addressing the voltage-current polarity constraints of this non-regenerative three-level rectifier. The latter is achieved by employing a simple two-level overmodulation algorithm, which also extends the operating range of the Vienna rectifier if required. The proposed algorithm also complements previous carrier-based space vector modulators developed for the three- level neutral-point-clamped inverter, providing the midpoint balancing capability for these schemes. Experimental results obtained with a 2 kW 40 kHz 200 Vdc DSP/FPGA controlled Vienna rectifier prototype are presented for verification purposes.

Sinusoidal line current rectification at unity power factor with boost quasi-resonant converters

Abstract: A sinusoidal line current rectifier is considered at unity power factor, where the conventional boost converter, usually utilized between the diode rectifier bridge and the DC bus capacitor, is replaced with a boost zero-current switching quasi-resonant converter (boost ZCS-QRC). The zero-current switching quasi-resonant rectifier (ZCS-QRR) is analyzed theoretically. Normalized curves are plotted, and equations that allow high flexibility in design are developed. A design example is proposed, and experimental results are presented to demonstrate the operating principle, the feasibility of the technique, and the validity of the theoretical analysis. >