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.

Electric motor drive

Abstract: The invention relates to a switch arrangement of an electric motor drive (1 ). The electric motor drive comprises safety switches (3) determined by the safety of the drive, a controlled mechanical brake (4), a power supply circuit (5) of the brake control, a power transformer (6), which power transformer comprises a network rectifier (7) and a power rectifier (8) of the motor. The power rectifier of the motor is at least partly implemented with controlled semiconductor switches (9, 10) arranged into a bridge. The power transformer comprises an intermediate circuit (11, 12) between the network rectifier and the power rectifier of the motor. The switch arrangement comprises normally-open switches (13, 14) in the intermediate circuit of the power transformer (6).

Method and apparatus for controlling synchronous rectifiers of a power converter

Abstract: For use in a power converter having a power switch and a synchronous rectifier (301) device coupled between input and output thereof, a control circuit, method of disabling a synchronous rectifier (301) device and a power converter employing the control circuit and method In one embodiment, the control circuit includes a synchronous rectifier (301) controller, coupled to the output of the converter and the synchronous rectifier (301) device, that senses time derivative of the output voltage and disables the synchronous rectifier (301) when the derivative is negative and greater than a predetermined magnitude

Rectifying antenna circuit

Abstract: A rectifying antenna circuit for a passive RF transponder comprising a series resonant circuit of an antenna, a voltage rectifier circuit including a diode and a capacitance shunting the diode, the capacitance providing a primary voltage amplification role and the diode providing a rectification and a voltage amplification role.

Simplified control method for single-phase multilevel active rectifier with current harmonic filtering characteristics

Abstract: The active power filter is an important way to reduce reactive power and harmonic currents from nonlinear loads. A simple control strategy is presented which employs an active rectifier, based on neutral point clamped topology, to work simultaneously as an active power filter to decrease current harmonics. The system power factor is also compensated in the proposed control algorithm. The active rectifier forces the mains current to be sinusoidal and in phase with the mains voltage. A voltage source rectifier, with carrierless hysteresis PWM current control, is used in the inner loop control. A simple PI DC-link voltage controller is adopted in the outer loop control. The control strategy of the adopted active rectifier is based on a look-up table to reduce the cost and required hardware. The proposed scheme can achieve power factor correction, without complicated calculations for harmonic elimination and without a dedicated active power filter. A diode rectifier-fed capacitive load as the nonlinear load is taken on the AC mains to demonstrate the effectiveness of the proposed active rectifier for reactive power and harmonic compensation.