Firing circuit using Cosine-Wave Scheme with Power Supply Manufacturer,Supplier and Exporter in India
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Product Code : SCL-EELE-12902
Indian Lab Suppliers supplies the Firing circuit using Cosine-Wave Scheme with Power Supply (Product ID: 12902) as part of its electronics engineering lab equipment range. It is a cosine-wave comparator firing circuit for a single-phase converter, which makes the converter output vary linearly with the control voltage.
Quick Answer
The circuit derives a cosine wave from the 6 V AC supply and compares it with a DC control voltage; firing occurs where the two are equal, so the firing angle is the inverse cosine of the control-to-peak ratio and the average converter output becomes proportional to the control voltage. Six op-amps generate the cosine wave and perform the comparison, a triple 3-input AND gate combines the timing signals, and four NPN transistors drive two 1:1:1 pulse transformers. Two potentiometers set the control levels. Built-in 6 V AC and ±12 V DC, 100 mA supplies power the board from 230 V ±10%, 50 Hz mains.
Key Specifications
| Parameter | Detail |
|---|---|
| Scheme | Cosine-wave comparator firing for a single-phase converter |
| ICs | 6 op-amps; triple 3-input AND gate |
| Output stage | 4 NPN transistors; 2 pulse transformers 1:1:1 |
| Controls | 2 potentiometers |
| Supplies | 6 V AC, 100 mA; ±12 V DC, 100 mA regulated |
| Mains | 230 V ±10%, 50 Hz; ON/OFF switch, fuse and indicator lamp |
| Connections | 4 mm stackable patch cords, 0.5 m |
Where This Is Used
Studied alongside the Firing circuit using Ramp Comparator Scheme with Power Supply (Product ID: 12900) and the Firing circuit using Op-Amps and Gates with Power Supply (Product ID: 12901) to compare firing schemes. Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
What is the advantage of cosine firing?
The average converter output varies linearly with the control voltage.
How is the cosine wave produced?
By shifting the synchronising sine wave through 90°, typically with an integrator.
How many pulse outputs are there?
Two pulse transformers, each 1:1:1.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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