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.

An improved full bridge zero-voltage switching PWM DC-DC converter using a two inductor rectifier

Abstract: An improved full bridge ZVS (zero-voltage switching) PWM (pulse-width-modulated) converter using a two inductor rectifier DC/DC power converter is presented. For this improved topology the main devices are switched on under ZVS conditions using the energy stored in the secondary filter inductors. It utilizes the low leakage inductance of a coaxial winding transformer to reset the currents in the rectifier diodes and eliminate the secondary voltage spike. The two-inductor rectifier has only one diode conduction drop in addition to frequency doubling in the output capacitor. The secondary-filter size in the proposed topology is rather small. The advantages of the new topology include a wide range with ZVS, no lost duty cycle due to diode recovery, no secondary voltage spikes, and to high power density and high efficiency. >

High-Efficiency Bridgeless Three-Level Power Factor Correction Rectifier

Abstract: A high-efficiency bridgeless three-level power factor correction (PFC) rectifier is proposed. The circuit configuration of the proposed rectifier consists of four metal oxide semiconductor field-effect transistor (MOSFET) switches, and the reverse recovery problems of the switches are eliminated. Also, the proposed rectifier with three voltage levels reduces the power losses, harmonic components, voltage ratings, and electromagnetic interference. To control the grid current and the output voltage effectively, a feed-forward nominal voltage compensator with the mode selector is developed; by presetting the operating point of the grid voltage, this compensator improves the control environment. Thus, the proposed three-level PFC rectifier with developed control algorithm provides high power quality and high efficiency of 99.05%. Experimental results based on a 1-kW prototype are provided to evaluate its performance and verify the analysis.

A method and device for power conversion

Abstract: As a front end power factor correction circuit in a rectifier a boost conversion topology is often used. A great problem with this topology is the rectifier diode. This diode must be of a high voltage type in a boost application and will therefore have a large reverse-recovery current before it will block the voltage. This current may cause large losses. With the solution according to the invention care will be taken to the recovery current in a more effective way than any earlier solution has obtained. The proposed circuit comprises essentially a boost circuit, where a main and first inductor L1 (3) and a main and first diode D1 (4) are connected in series from an input to an output and a main and first capacitor C1 (5) from an output to ground. A main and first transistor M1 (1) is connected from between the first inductor L1 (3) and the first diode D1 (4) to ground. An auxiliary and second inductor L11 (6), a second diode D11 (7) and a second transistor M11 (2) are connected in series from between the first inductor L1 (3) and the first diode D1 (4) to ground. Two other diodes a third and fourth diode D12 (10), D13 (9) are connected in series from between the second diode D11 (7) and the second transistor M11 (2) to the output.

Systems, methods, and apparatus for rectifier filtering for input waveform shaping

Abstract: This disclosure provides systems, methods, and apparatus for filtering of a rectifier in a wireless power receiver. In one aspect a wireless power receiver apparatus is provided. The receiver apparatus includes a coil circuit configured to wirelessly receive power via a wireless field. The receiver apparatus further includes a rectifier circuit configured to provide direct-current (DC) based at least in part on the received power. The receiver apparatus further includes a first filter circuit electrically connected between the coil and the rectifier circuit and configured to reduce emissions from the rectifier circuit and configured to maintain a first impedance presented by the rectifier circuit substantially equal to a second impedance presented to the coil circuit. The receiver apparatus further includes a band-stop filter circuit configured to electrically isolate emissions from the rectifier circuit.

Minimizing Current Distortion of a Three-Phase Bridge Rectifier Based on Line Injection Technique

Abstract: This paper demonstrates a new concept and a novel passive resonant construction, which is connected between the ac and dc sides of the three-phase bridge rectifier, for reducing line current harmonics. This resonant net connection, in combination with the conduction intervals of each diode, generates a circulating third harmonic current between the ac and dc sides of the diode rectifier. This will cause a significant reduction in line current harmonics. As a result of this, the shape of line current becomes nearly sinusoidal. Results of analytical, simulation, and experimental verification on a typical example are presented. The total harmonic distortion (THD) of the line current can be reduced from 32% to 5%. Therefore, based on this concept a very cheap, lossless, and passive rectifier with low THD and almost unity power factor has been developed