Single Phase Semi Converter Drive Manufacturer,Supplier and Exporter in India
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Product Code : SCL-EELE-12798
Indian Lab Suppliers supplies the Single Phase Semi Converter Drive (Product ID: 12798) as part of its electronics engineering lab equipment range. It controls the speed of a DC shunt motor with a single-phase half-controlled (semi) converter fired by a ramp-comparator circuit.
Quick Answer
A ramp synchronised to the 6 V AC reference is compared with a DC level set by the firing-angle potentiometer; the resulting pulses, shaped by gate ICs and transistors, reach the two SCRs through a 1:1 pulse transformer. Because half the bridge uses diodes, the output voltage cannot reverse, so the semi converter works in one quadrant, and raising the firing angle lowers the average voltage and the motor speed. The board has ±12 V DC supplies, op-amp, EX-OR, AND and inverter ICs, two SCRs, six diodes and two 3½-digit panel meters, and drives a ½ HP, 1500 rpm (no-load) DC shunt motor. It works from 230 V AC ±10%, 50 Hz with a 2 A MCB; a 20 MHz dual-trace oscilloscope is needed and not included. Please confirm the motor armature and field voltages at quotation.
Key Specifications
| Parameter | Detail |
|---|---|
| Converter | Single-phase semi converter: 2 SCRs, 6 diodes |
| Firing circuit | Ramp comparator with op-amps, logic ICs, 2 NPN transistors, 1:1 pulse transformer |
| Control | Firing-angle potentiometer |
| Supplies | 6 V AC 100 mA; ±12 V DC 100 mA regulated |
| Meters | 2 × 3½-digit DPM for voltage |
| Motor | DC shunt, ½ HP, 1500 rpm no load (about 20.4 kg) |
| Mains | 230 V AC ±10%, 50 Hz; 2 A single-pole MCB, fuse |
| Board | W 415 × H 165 × D 315 mm, about 5.7 kg |
| Accessories | 21 shrouded 4 mm patch cords (50 cm and 100 cm) |
| Also needed | 20 MHz dual-trace oscilloscope (not included) |
Where This Is Used
Used in power-electronics and electric-drives labs; compare it with the fully controlled Single Phase Full Wave Converter Drive (Product ID: 12799). The board works at mains voltage with a rotating motor, so connect it only under qualified supervision with an earthed supply and guard the motor shaft. Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
Why is it called a semi converter?
Half of its bridge uses diodes instead of SCRs, so only positive output voltage is possible.
How is speed controlled?
By changing the SCR firing angle with the potentiometer.
What else is needed?
A 20 MHz dual-trace oscilloscope, which is not included.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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