Bi-Directional Thyristor vs Triac

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STD Bi-Directional Thyristor vs Triac

Simulation_Circuit

License: Public Domain

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Update time： 2023-11-18 14:33:48

Creation time： 2023-11-12 16:19:39

Description

Spice simulation demonstrating that an anti-parallel pair of thyristors be functionally replaced by a Triac.

Note however that the specifications of the triac chosen to replace the thyristors in the original circuit must be carefully studied to ensure that it is a suitable replacement for the supply and load conditions and can be driven by the original gate drive circuit.

The simulation uses spice models developed for EasyEDA by signality.co.uk

To run each simulation, press the F8 key.

For more information about simulation in EasyEDA Std, please see the Simulation Tutorial (3) in (2) in:

https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a

Design Drawing

schematic diagram

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Anti-parallel Thyristors
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Single Thyristor
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Triac
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PCB

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BOM

BOM download Purchase Parts

ID	Name	Designator	Quantity	spiceSymbolName
1	V=V(gen)*V(softstart)	B1,B4	2	BV
2	V=0.5(tanh((TIME-5m)500)+1)	B2,B3	2	BV
3	1N4148	D2,D3,D4,D5,D6	5	1N4148
4	PULSE(0 {Ig} {tdel} 10n 10n 0.1m {1/fmains})	I1,I3	2	Isin
5	{Rload}	R1,R2	2	Resistor
6	2N5060EE	T1,T3	2	SCR	EC103D1
7	SINE(0 {Vmains} {fmains})	V1,V2	2	Vsin
8	L0109NT	T2	1	Triac	Q4004LT