PLECS 1.3 Online Help

Thyristor

Purpose

Ideal thyristor with or without forward voltage and on-resistance.

Library

Switches

Description

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The Thyristor can conduct current only in one direction--like the diode. In addition the diode it can be controlled by an external gate signal. The thyristor is modeled by an ideal switch that closes if the voltage between anode and cathode is positive and a non-zero gate signal is applied. The switch remains closed until the current becomes zero. A thyristor cannot be switched off via the gate.

Parameters and Dialog Box

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Width
The width of the component. This affects both the width of the electrical ports and the width of the gate input signal. The default is 1.

Each of the following parameters may either be a scalar or a vector with the width of the component:

Forward voltage
Additional dc voltage V f in volts (V) between anode and cathode when the thyristor is conducting. The default is 0.
On-resistance
The resistance Ron of the conducting device, in ohms (_O_). The default is 0.
Initial conductivity
Initial conduction state of the thyristor. The thyristor is initially blocking if the parameter evaluates to zero, otherwise it is conducting.

Probe Signals

Thyristor voltage
The voltage measured between anode and cathode.
Thyristor current
The current through the thyristor flowing from anode to cathode.
Thyristor conductivity
Conduction state of the internal switch. The signal outputs 0 when the thyristor is blocking, and 1 when it is conducting.