Transistor with reverse diode#

block — Block appearance in REPEAT VISION#

This unit is a simplified version of “Transistor - Reverse Diode” electrical circuit: in this circuit, resistance of diode and transistor activated state is the same and the direct bias voltage of the diode is not taken into account. The transistor is represented by a controlled circuit breaker, which opens at the control signal (G)> 0 (see Fig. 1 below).

TransistorIGBTDiode — Fig. 1 Circuit of transistor with reverse diode#

The (Fig. 2) shows CVD of equivalent circuit (diode - reverse connection, so its activated state is in the 3rd quadrant):

Section 0-3 corresponds to the deactivated transistor state when the control command is g = 0: \(R_T\)=\(R_{clos.}\);
The open state of the diode illustrates section 1-2 when voltage drop across at transistor is less than the diode forward bias voltage: \(R_D\)=\(R_{int.}\);
Accordingly, in section 2-3 the diode is in the closed state and its resistance: \(R_D\)=\(R_{clos.}\);
Section 5-4 corresponds to the transistor state when the control command is g > 0: \(R_T\)=\(R_{int.}\).

1. Properties#

Property	Default Value	Description	Units of measurement
Internal resistance	0.001	-	Ohm
Turn-off resistance	1e8	-	Ohm
Snubber circuit	On	-	-
Snubber resistance, available when selecting `Snubber circuit` - `On`	1e6	-	Ohm
Snubber capacitance, available when selecting `Snubber circuit` - `On`	1e9	-	F

2. Inputs and outputs#

Parameters	input/output	Description	Units of measurement	Port type
Control port	Input	-	-	Automation
Collector	Input	-	-	Electronics
Emitter	Output	-	-	Electronics

In order to see the connection capabilities of the block, you need to go to page Description of block ports