Effect of free wheeling diode in Single phase Fully-Controlled Bridge Converter with Power Supply Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12909
Indian Lab Suppliers supplies the Effect of free wheeling diode in Single phase Fully-Controlled Bridge Converter with Power Supply (Product ID: 12909) as part of its electronics engineering lab equipment range. It is a four-SCR single-phase fully controlled bridge converter for comparing R and R-L loads and the effect of a freewheeling diode.
Quick Answer
Two UJT oscillators with firing-angle potentiometers fire the four SCRs through two 1:1:1 pulse transformers. With the 12 V, 5 W bulb alone, output voltage follows the supply after each firing point; adding the 20 mH inductor lets current continue into the negative half cycle, so the output goes negative for part of the cycle. Connecting a freewheeling diode across the R-L load removes those negative portions and raises the average output. A 35 V DC, 500 mA zener-regulated supply and a bridge rectifier are built in, and the board runs from 230 V AC ±10%, 50 Hz. A 20 MHz dual-trace oscilloscope is needed; use isolated or differential probes rather than disconnecting its earth.
Key Specifications
| Parameter | Detail |
|---|---|
| Experiments | R load; R-L load; R-L load with freewheeling diode |
| Power stage | 4 SCRs in full bridge |
| Firing | 2 UJTs; 2 pulse transformers 1:1:1; 2 firing-angle potentiometers |
| Loads | Bulb 12 V, 5 W; inductor 20 mH |
| Supply | 35 V DC, 500 mA zener regulated; bridge rectifier |
| Mains | 230 V AC ±10%, 50 Hz; ON/OFF switch, fuse and indicator lamp |
| Weight / size | About 5 kg; W 415 × H 165 × D 315 mm |
| Also required | 20 MHz dual-trace oscilloscope |
Where This Is Used
A low-voltage companion to the mains-lamp Single phase fully-controlled Bridge Converter (Product ID: 12892), and used with the SCR Converters and Reactive Loads with Power Supply (Product ID: 12883). Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
What does the freewheeling diode do?
It carries the inductive load current when the supply reverses, so the output no longer goes negative.
What inductance is supplied?
A 20 mH inductor.
What else is needed?
A 20 MHz dual-trace oscilloscope.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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