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Search Results: 1 - 10 of 1728 matches for " rectifier circuit. "
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A New Current Conveyor Full-Wave Rectifier for Low Frequency/Small Signal Medical Applications  [PDF]
Adisak Monpapassorn
Circuits and Systems (CS) , 2018, DOI: 10.4236/cs.2018.93006
Abstract: This paper presents a new current conveyor (CCII+) full-wave rectifier for low frequency/small signal medical applications. The proposed rectifier is based on the current conveyor full-wave rectifier proposed previously, but the proposed rectifier is better in view of no need diodes to rectify, and no need bias sources to overcome the zero crossing error. It needs only two CCII+s, two resistors, and three simple current mirrors, which is easy for IC implementation and for building in many countries. The PSPICE simulation with the current conveyor CCII+ in the current feedback opamp AD844 IC and the 2N2222 bipolar current mirror shows the good low frequency/small signal rectification, the operation voltage of down to 6 \"\".
Precision Full-Wave Rectifier Using Two DDCCs  [PDF]
Montree Kumngern
Circuits and Systems (CS) , 2011, DOI: 10.4236/cs.2011.23019
Abstract: A new precision full-wave rectifier employing only two differential difference current conveyors, which is very suitable for CMOS technology implementation, is presented. The proposed rectifier is the voltage-mode circuit, which offers high-input and low-output impedance hence it can be directly connected to load without using any buffer circuits. PSPICE is used to verify the circuit performance. Simulated rectifier results based-on a 0.5 µm CMOS technology with ±2.5 V supply voltage demonstrates high precision rectification and excellent temperature stability. In addition, the application of proposed rectifier to pseudo RMS-to-DC conversion is also introduced.
New Squarer Circuits and a Current-Mode Full-Wave Rectifier Topology Suitable for Integration
S. Minaei,E. Yuce
Radioengineering , 2010,
Abstract: In this paper, three squarer configurations and a current-mode (CM) full-wave rectifier circuit are suggested. The first and second squarer configurations respectively use two PMOS and two NMOS transistors while the third one employs three PMOS and one NMOS transistors. A CM full-wave rectifier with high output impedance current is developed. All of the proposed circuits provide several advantages such as low number of components and less power consumption. The proposed circuits are simulated using SPICE program to demonstrate their performance and workability.
A Protection Circuit for DC-DC Converter with Voltage Doubler
D.Elangovan,A.Gopi,Dr.R.Saravanakumar
International Journal of Engineering and Technology , 2012,
Abstract: This paper proposes a method to obtain a protected voltage gain by employing a protection circuit for the voltage doubler or multiplier circuit in an isolated tyde DC-DC Converter. The entire set up consists of a phase shift converter with a protected bridge/voltage doubler rectifier on the output side. The operating frequency of the phase shift converter is 20-25kHz (depending on the requirement of the application) which is high enough to improve the efficiency. Ferrite core transformer is used in place of ordinary air core transformer, which is small in size with number of turns of the transformer is reduced and the overall power density is increased. The doubler circuit consists of electrolytic capacitors, which are rated at 400V in order to comply with IEC65 requirements. This paper proposes an “electrolytic capacitor protection circuit”, which enables the voltage rating of the electrolytics to be reduced to 250V. This circuit results in cost savings of more than 50% in the price of the electrolytic filter capacitors. The circuits were simulated using PSPICE SOFTWARE and the following results were obtained. For an input voltage of 200V, an output of 200V and400V were obtained in bridge mode and doubler mode respectively.
Vibration energy harvesting using piezoelectric transducer and non-controlled rectifiers circuits
Motter, Daniel;Lavarda, Jairo Vinícius;Dias, Felipe Aguiar;Silva, Samuel da;
Journal of the Brazilian Society of Mechanical Sciences and Engineering , 2012, DOI: 10.1590/S1678-58782012000500006
Abstract: vibration energy harvesting with piezoelectric materials is of practical interest because of the demand for wireless sensing devices and low-power portable electronics without external power supply. for practical use of vibration energy harvester with piezoelectric materials, it is necessary to process the alternating current (ac) by using different rectifiers' circuits in order to charge batteries with direct current (dc) or to feed electronic devices. unfortunately, most of the models used focused on simplifying the energy harvesting circuit into a simple resistive load. in the real-world applications, the energy harvesting external circuit is more complex than a simple load resistance. in this sense, the goal of the present paper is to describe a comprehensive strategy for power harvesting device to estimate the output power provided by a cantilever beam with the electrodes of the piezoceramic layers connected to a standard rectifier circuit. the true electrical components were considered in the full-wave rectifier circuit with four diodes in bridge. a very simple and comprehensive description for choosing the capacitance and resistance loads is provided. in order to illustrate the results, numerical simulations and experimental verifications are also performed to ensure the accuracy. all tests and results are described and detailed using matlab, the simpowersystem toolbox of the simulink and an experimental setup.
Modelling of a Serial Wound DC Motor Supplied by a Semi-Controlled Rectifier
Pavel Zaskalicky
Advances in Electrical and Electronic Engineering , 2006,
Abstract: A serial wound DC motor is one of most used electrical machines in a small electrical instruments and home equipments by reason, that its speed is easily controlled by a supply voltage. Suppose that the motor is supplied by a semicontrolled rectifier and operate in open circuit loop. After representing of the mathematical model, a simulation model based on the Matlab-Simulink is derived; this allows for the determination of the waveforms of the speed current and torque of the machine for different state operation. Induced voltage of the rotor is determined as a function of the magnetic core saturation and of the armature reaction.
Current-Mode Dual-Phase Precision Full-Wave Rectifier Using Current-Mode Two-Cell Winner-Takes-All (WTA) Circuit
J. Koton,A. Lahiri,N. Herencsar,K. Vrba
Radioengineering , 2011,
Abstract: In addition to the recently proposed full-wave rectifier by Prommee et al. using voltage-mode (VM)two-cell winner-takes-all (WTA) circuit, we present current-mode (CM) precision full-wave rectifier using CM two-cell WTA circuit. The popular Lazzaro’s CM WTA circuit has been employed for the purpose and there is no requirement of inverting the input signal. Also, dual complimentary phases of the output current signal are available from high-output impedance terminals for explicit utilization. As compared to many recently proposed CM rectifiers using complex active devices, e.g. dual-X current conveyor or universal voltage conveyor, our circuit is very compact and requires a total of 21 transistors. SPICE simulation results of the circuit implemented using 0.35 um TSMC CMOS technology are provided which verify the workability of the proposed circuit.
High-Precision Half-Wave Rectifier Circuit In Dual Phase Output Mode
Theerayut Jamjaem,Bancha Burapattanasiri
International Journal of Computer Science and Information Security , 2009,
Abstract: This paper present high-precision half-wave rectifier circuit in dual phase output mode by 0.5 μm CMOS technology, +/- 1.5 V low voltage, it has received input signal and sent output current signal, respond in high frequency. The main structure compound with CMOS inverter circuit, common source circuit, and current mirror circuit. Simulation and confirmation quality of working by PSpice program, then it able to operating at maximum frequency about 100 MHz, maximum input current range about 400 μAp-p, high precision output signal, low power dissipation, and uses a little transistor.Keywords-component; half-wave; rectifier circuit; highprecession; dual phase;
High-Precision Multi-Wave Rectifier Circuit Operating in Low Voltage + 1.5 Volt Current Mode
Bancha Burapattanasiri
International Journal of Computer Science and Information Security , 2009,
Abstract: This article is present high-precision multi-wave rectifier circuit operating in low voltage +/- 1.5 Volt current modes by CMOS technology 0.5 μm, receive input and give output in current mode, respond at high frequency period. The structure compound with high-speed current comparator circuit, current mirror circuit, and CMOS inverter circuit. PSpice program used for confirmation the performance of testing. The PSpice program shows operating of circuit is able to working at maximum input current 400 μAp-p, maximum frequency responding 200 MHz, high precision and low power losses, and non-precision zero crossing output signal.Keywords-component; rectifier circuit; high-precision; low voltage; current mode;
新型整流变压器谐波磁通与谐波涡流损耗研究
Study on Harmonic Flux and Harmonic Eddy Loss for a New Rectifier Transformer
 [PDF]

孙树波, 张志文, 曾春
Transmission and Distribution Engineering and Technology (TDET) , 2015, DOI: 10.12677/TDET.2015.43004
Abstract:
本文介绍了大功率新型滤波整流系统的构成,分析了新型整流变压器谐波磁通的减小机理。根据工程样机实测数据确立了新型滤波整流系统的电路模型。使用ANSYS有限元分析软件建立了新型整流变压器的场路耦合三维模型,计算了三种工况下变压器谐波磁通和油箱谐波涡流损耗。结果验证了新型滤波整流系统的变压器具有谐波磁通小、涡流损耗小等特点。
This article describes the constitution for the New High-Power Filter and Rectifier System (NHPFRS). The principle to reduce the harmonic flux of its rectifier transformer is analyzed. According to the measured data, the model of the NHPFRS for the engineering prototype is established. Using ANSYS finite element analysis software, a three-dimensional model of the field-circuit coupled for the new rectifier transformer is built. The transformer tank harmonic flux and harmonic eddy los- ses are calculated under the three conditions. The results validate that the NHPFRS has a few of features such as small harmonic flux and small harmonic losses.
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