AC/DC Rectifier

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  • AC-DC Conversion
    In most power electronic applications, the power input is in the form of a 50 Hz or 60 Hz sine-wave AC voltage provided by the electric utility, which is then converted to a DC voltage. Increasingly, the trend is to convert the input AC into DC in an uncontrolled manner, using rectifiers and diodes
  • Supplying an AC/DC Power Supply
    to work from 100VAC to 240VAC) or fixed input AC/DC supplies (designed to work at 115VAC or 230VAC) will probably work with a DC input and the only difference in operation would be that only two of the diodes forming the bridge rectifier would be utilised. A linear power supply that has a transformer
  • Braking and Regenerative Energy with AC Drives
    someplace. In the case of an AC PWM drive, that someplace is back to the DC bus (The DC bus is that portion of the drive after the rectifier section where DC power is collected and stored for use by the inverter section).
  • Regeneration vs. Dynamic Braking in DC Drives
    are in a DC phase controlled drive. Regeneration in a phase controlled DC drive involves a second (antiparellel connected) rectifier bridge. During regeneration, mechanical energy from the rotating load and armature (now acting as a generator), is inverted from DC directly back onto the AC power line
  • Brushless DC Motor Control Using PIC18FXX31 MCUs
    A PICDEM TM MC demo board was used to develop, test and debug the motor control code. The PICDEM MC has a single-phase diode bridge rectifier, converting AC input to DC and a power capacitor bank that keeps a stable DC bus. A 3-phase IGBT-based inverter bridge is used to control the output voltage
  • The Role of Electrolytic Capacitors
    Turn the sawtooth wave after rectification into a smooth pulsating wave, which is close to DC. In the power circuit, the rectifier circuit turns the AC into a pulsating DC, and a larger capacity electrolytic capacitor is connected after the rectifier circuit. Using its charge and discharge
  • A New Solution for Harmonics Generated by Variable Speed Drives (.pdf)
    to enhance the conversion of ac power to dc power within a VSD or other equipment with a 3-phase, 6-pulse diode bridge rectifier front-end.
  • Transformerless Power Supplies: Resistive and Capacitive
    There are several ways to convert an AC voltage at a wall receptacle into the DC voltage required by a microcontroller. Traditionally, this has been done with a transformer and rectifier circuit. There are also switching power supply solutions, however, in applications that involve providing a DC

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