摘要:
An apparatus and a method for wireless power reception include converting a received wireless power to a wireless power for charging using a synchronous rectifier and a direct current/direct current (DC/DC) converter having a structure providing a high efficiency and low heat generation even when a high charging current is supplied.
摘要:
The invention relates to a synchronous rectifier (1), which rectifies an alternating voltage signal as an input signal and/or forwards a direct voltage signal as an input signal for use as an output signal, comprising at least: a rectification unit (5) consisting of at least one controllable switching element (12); a smoothing unit (7), which is connected downstream of the rectification unit (5) and smoothens the signal rectified or forwarded by the rectification unit (5) and provides said signal for use as an output signal (Ua); a control logic system (2, 3, 4), which actuates the rectification unit (5) using the input signal and the output signal (Ua) coming from the smoothing unit (7).
摘要:
The present invention provides systems and methods for reducing harmonics, for example when using an AC to AC converter to drive a load such as a motor drive. In a first embodiment, a plurality of AC/DC converter stages are connected in parallel between an AC supply and a DC link, each of said AC/DC stages including a rectifier, with the rectifiers of the load driving circuits being configured such that the rectification of the AC supply by the load driving circuits is staggered. Blocking diodes are used to prevent current circulation from one rectifier to another.
摘要:
The present invention relates to a converter (100) for an electric machine (103) comprising a semiconductor component (107-1) for converting a voltage, said semiconductor component being connected to at least one contact-connection (105-1), a voltage measuring device (101) for measuring a voltage drop U DS across the semiconductor component (107-1), and a control unit for controlling the semiconductor component (107-1), wherein the control unit is designed to determine a state of the contact-connection (105-1) on the basis of the measured voltage drop U DS .
摘要:
In a three-phase power supply comprising a rectifier bridge circuit of six rectifying diodes and having for each phase one unit of two rectifying diodes (101, 102, 103, 104, 105, 106) connected in series at a connection point (121, 123, 125), whereby an unconnected cathode of each unit of two rectifying diodes is connected to a pole of a DC power supply system, especially supplying a LEDs system with LED segments, and an unconnected anode of another diode of each unit of two rectifying diodes (101, 102, 103, 104, 105, 106) connected at the connection point (121, 123, 125) is connected to (-U) pole of the DC power supply system supplying the electronic device provided with a control, to each rectifying diode (101, 102, 103, 104, 105, 106) of the rectifier bridge circuit of six rectifying diodes is connected directly in parallel a field-effect transistor (FET) of a rectifying unit (111, 112, 113, 114, 115, 116) carrying electric current in the same direction as the rectifying diode bypassed by the field-effect transistor (FET).
摘要:
Rectifier circuit (600) comprising a pair of input terminals (614, 616), a pair of output terminals (654, 656), and a first circuit (601) interconnecting the pair of input terminals (614, 616). The first circuit (601) comprises an energy storing element (34) and a rectifier bridge (642), wherein the rectifier bridge comprises at least one controllable switching element (645, 647) per bridge branch. An output of the rectifier bridge (642) supplies the pair of output terminals (654, 656) and wherein the at least one controllable switching element per bridge branch is configured to provide a temporary conducting path via the rectifier bridge which substantially bypasses the pair of output terminals (654, 656) and which substantially short-circuits a second circuit (602) comprising the energy storing element (34), the pair of input terminals (614, 616), and an energy source (12) connectable to the pair of input terminals. A converter for synchronized switch harvesting on inductor comprising such a rectifier circuit and a method for rectifying an electrical current generated by an energy source are also described.
摘要:
A non-quasistsic MOS rectifier circuit (530) uses a bridge-rectifier configuration using four organic PMOS transistors (Ml, M2, M3 and M4), an antenna coil (532) to induce a differential input signal, and an output capacitor (534) for filtering the rectified output signal. The VSS or ground-connected transistors are diode-connected with the gate connection on the coil side of the transistor channel. The VDD-connected transistors have gates connected to the opposing VDD-connected transistor source that is connected to the coil (532). This configuration results in full-wave rectification. The gates are all connected to the coil and thereby become part of of the capacitance of the radio frequency parallel resonant network. The transistor gates are then switched at the rate of the radio frequency signal with no delay relative to the coil voltage, Operation of the organic transistors is based on non-quasistatic behavior of the transistor. Non-quasistatic operation results in rectification at a frequenct much higher than the quasistatic limit of transistor unity gain bandwidth.
摘要:
Schaltung zur Leistungsfaktorkorrektur für Schaltnetzteile, Ladegeräte und dergleichen, mit
einer Brückenschaltung, die vier in zwei Halbbrücken geschaltete Dioden aufweist, zwei in einer ersten Halbbrücke parallel zu den Dioden geschaltete Schalttransistoren, und zwei Spulen, die jeweils zwischen Anschlüsse einer Wechselspannungsquelle und zwei Anschlüsse der Brückenschaltung geschaltet sind, wobei diagonal in der Brückenschaltung ein Kondensator geschaltet und der Diagonalanschluß der ersten Halbbrücke mit Masse verbunden.