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.

High d/d, fast turn-on darlington controlled semiconductor switch

Abstract: A high di/dt, fast turn-on Darlington controlled rectifier semithyristor semiconductor switch embodies a body of semiconductor material wherein two controlled rectifier switches are formed, each having a separate gate and a separate cathode but both sharing a common anode. The cathode current of one controlled rectifier switch is the gate current for the second controlled rectifier switch thereby enabling a small initial current to be amplified and turn-on a larger controlled rectifier switch whereby the overall effect is a fast turn-on gate controlled switch with a high di/dt rating.

Phase Compensation Driving Scheme for Synchronous Rectifiers

Abstract: Phase compensation of a voltage appearing on physical terminals of a synchronous rectifier switching element such as a MOSFET is used to substantially eliminate effects of package inductance of the synchronous rectifier and thus approximate the actual voltage across the circuit element providing synchronous rectification in, for example, a switching power converter. By doing so and using the phase compensated signal to control the synchronous rectifier, switching time may be more suitably controlled to improve efficiency of the synchronous rectifier by substantially eliminating body diode conduction and body diode reverse recovery effects.

Single-phase half-bridge rectifier with power factor correction

Abstract: A single-phase half-bridge switching mode rectifier is presented to draw a sinusoidal line current, to achieve power factor correction and to maintain the DC-link voltage constant. Four active switches are used in the proposed rectifier to generate a unipolar pulse width modulation (PWM) voltage waveform on the AC terminal voltage. There is no clamping diode in the proposed rectifier (as compared with the neutral point clamped (NPC) converter) so as to achieve three-level PWM operation. Two control loops are used in the proposed control scheme. In the outer control loop, a proportional integral voltage controller is used to regulate the DC-link voltage. A phase lock loop circuit is adopted to generate a sinusoidal waveform in phase with mains voltage to achieve power factor correction. In the inner control loop, a carrier-based current controller is used to track the line current command. To compensate the neutral point voltage due to the load variation, a neutral point voltage compensator is used in the control scheme. Three voltage levels are generated on the AC terminal of the adopted rectifier. Computer simulations and experimental results are presented to verify the effectiveness of the proposed control algorithm.

Energy Harvesting Using Frequency Rectification

Abstract: An energy harvesting apparatus (1) includes an energy frequency rectification structure (5) to receive mechanical energy and a first frequency, and a solid-state electromechanical transducer (3) coupled to the inverse frequency rectifier (5) to receive a force provided the inverse frequency rectifier (5) The force, when provided by the inverse frequency rectifier (5), causes the solid-state transducer (3) to be subjected to a second frequency that is higher than the first frequency to thereby generate electromechanical power.

Bridgeless isolated PFC rectifier using bidirectional switch and dual output windings

Abstract: In this paper, a family of bridgeless power factor correction (PFC) rectifier which configures isolated single-stage is proposed. The proposed PFC rectifiers utilize bidirectional switch to handle both positive and negative input voltage without bridge diodes. Dual output windings of transformer enable the rectifiers dispense with any additional magnetic component. As a member of the proposed rectifier family, a bridgeless flyback PFC rectifier is analyzed and experimented to verify its higher efficiency than its conventional counterpart.