Three Phase Half Wave AC Voltage Controller Manufacturer,Supplier and Exporter in India
Product Code : SCL-EELE-12802
Indian Lab Suppliers supplies the Three Phase Half Wave AC Voltage Controller (Product ID: 12802) as part of its electronics engineering lab equipment range. It studies a three-phase half-wave AC voltage controller, in which each phase has a thyristor for one half-cycle and a diode for the other, feeding a resistive load.
Quick Answer
Delaying the thyristor firing angle trims the positive half-cycles while the diodes pass the negative ones in full, so the RMS load voltage can be varied; the unequal half-cycles also introduce a DC component, which is why this circuit is mainly a teaching topology. Firing comes from three identical cards (zero-crossing detector, integrator, comparator and pulse generator), high-frequency gated firing and three pulse-transformer drivers, controlled by one potentiometer. Power is taken through three 230:50 V, 0.5 A transformers into a built-in three-phase resistive load, and two 3½-digit panel meters read voltage and current. The board runs from 415 V, 50 Hz three-phase mains with a 0.5 A four-pole MCB; use it earthed, under supervision, with a 20 MHz dual-trace oscilloscope (not included).
Key Specifications
| Parameter | Detail |
|---|---|
| Power circuit | Three-phase half-wave: 3 thyristors (positive group), 3 diodes (negative group) |
| Firing | 3 identical cards: zero-crossing detector, integrator, comparator, pulse generator; high-frequency gated firing; 3 pulse-transformer drivers |
| Transformers | 3 × 230:50 V, 0.5 A; 6 V AC for triggering |
| Supplies | ±12 V DC, 100 mA |
| Load | Built-in three-phase resistive load |
| Meters | 2 × 3½-digit DPM, voltage and current |
| Mains | 415 V, 50 Hz, three phase; 4-pole MCB 0.5 A |
| Board | W 415 × H 165 × D 315 mm, about 7.2 kg |
| Accessories | 14 patch cords, 4 mm, 50 cm; 20 MHz dual-trace oscilloscope needed (not included) |
Where This Is Used
Used in power-electronics labs before the fully controlled Three Phase Full Wave AC Voltage Controller (Product ID: 12803); the Three Phase Firing Circuit for 3 Phase AC Voltage Controller (Product ID: 12805) covers the firing circuit on its own. Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.
Frequently Asked Questions
Why does a half-wave controller produce a DC component?
Only the positive half-cycles are phase-controlled, so the two halves of the load voltage are unequal.
What load is used?
A built-in three-phase resistive load.
What supply is needed?
415 V, 50 Hz three-phase mains.
Related Categories
Electronics Engineering Lab Equipment · Electronics Lab Equipment · Engineering Lab Equipment
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