Rectifier Circuits (Gleichrichterschaltungen)

Vocabulary flashcards covering single-phase and three-phase rectifier circuits, circuit naming conventions, ripple voltage, and transformer center taps.

Ungesteuerter Gleichrichter (Uncontrolled Rectifier)

A rectifier circuit that exclusively uses diodes, meaning the output voltage cannot be controlled or influenced.

Gesteuerter Gleichrichter (Controlled Rectifier)

A rectifier circuit that uses thyristors, allowing the level of the output voltage to be adjusted via the firing angle (Zündwinkel) and enabling inverter operation (Wechselrichterbetrieb).

Brummspannung (Ripple Voltage)

The AC voltage component (Wechselspannungsanteil) present in a rectified DC voltage.

Letter "M" (in Rectifier Designation)

Stands for center-tap circuit (Mittelpunktschaltung).

Number "1" (in Rectifier Designation)

Represents frequency multiplication or pulse number of one (Einpuls).

Letter "U" (in Rectifier Designation)

Stands for uncontrolled (ungesteuert), meaning the circuit uses diodes rather than controlled components.

Letter "E" (in Rectifier Designation)

Stands for half-wave rectifier (Einweggleichrichter).

Transformator mit Mittelpunktanzapfung (Center-Tapped Transformer)

A transformer whose secondary winding has an additional connection positioned exactly in the middle, dividing the winding into two equally sized halves.

B6U

An uncontrolled six-pulse bridge rectifier (Sechspuls-Brückenschaltung) for three-phase alternating current (Drehstrom) using a diode bridge.

M3U

An uncontrolled three-pulse center-tap rectifier (Dreipuls-Mittelpunktschaltung) for three-phase AC, where conduction always occurs through the diode with the highest phase voltage (Strangspannung).

Advantages of B6U over M3U

The B6U circuit provides twice the output voltage, twice the power, and lower ripple (geringere Welligkeit) compared to the M3U circuit.

Reduction of Ripple Voltage (Brummspannung verringern)

The ripple voltage can be decreased by using larger smoothing capacitors (größere Glättungskondensatoren).

Three-Phase Rectifiers (Gleichrichter für Drehstrom)

Two main rectifiers suitable for three-phase alternating current: the three-pulse center-tap circuit (Dreipuls-Mittelpunktschaltung, M3U) and the six-pulse bridge circuit (Sechspuls-Brückenschaltung, B6U).

Letters "k" and "a" (in Rectifier Connections)

"k" designates a cathode-side connection (kathodenseitiger Anschluss) and "a" designates an anode-side connection (anodenseitiger Anschluss).