Three Phase Half Controlled Thyristorized Bridge Converter Manufacturer,Supplier and Exporter in India
Product Code : EL-PET-1413
Jlab Export is a leading Three Phase Half Controlled Thyristorized Bridge Converter Manufacturer,and suppliers in India
Three Phase Half Controlled Thyristorized Bridge Converter (code EL-PET-1413) is a power electronics training board for studying a three-phase, line-commutated, half-controlled thyristor bridge with resistive and resistive-inductive loads and a freewheeling diode. JLab builds this 415 V three-phase trainer at its own works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Converter | Three-phase line-commutated half-controlled thyristorized bridge converter |
| Control cards | Three identical cards, one for each phase, each with zero crossing detector, integrator, comparator and pulse generator, controlling the triggering angles of the positive group of three thyristors |
| Firing angle control | Potentiometer |
| Driver circuits | Three, with pulse transformers |
| Firing | High-frequency gated dual-gate firing, 3 nos. |
| Triggering transformers | Three, 415 V : 6 V, AC supply for triggering |
| Rectification transformers | Three, 415 V : 50 V at 1 A |
| Triggering circuit supply | ±12 V and +5 V DC at 500 mA, IC-regulated |
| Loads | R and L load with load voltage divider |
| Freewheeling diode | One |
| Meters | Two 3½-digit digital panel meters (DPM) for voltage and current |
| Switching and protection | Three-pole power contactor with AC coil and push-to-ON switch; four-pole miniature circuit breaker (MCB) |
| Indicators | Jewel lights in red, blue and yellow |
| CRO sockets | Unearthed mains sockets for the CRO |
| Mains supply | Three-phase 415 V, 50 Hz AC |
| Patch cords | Stackable, 4 mm spring-loaded plugs, half a metre long |
| Terminals | Terminals/sockets on the panel for connections and observation of waveforms |
| Operating instructions | Detailed, with object, theory, design procedures, report suggestions and book references |
| Other apparatus required | Dual trace cathode ray oscilloscope, 20 MHz (unearthed) |
| Weight | 15 kg (approx.) |
| Dimensions | W 445 x H 260 x D 470 |
| Packing | Corrugated box |
| Quality check | Each trainer is visually inspected before dispatch |
| Pack quantity | Each (sold individually) |
| Minimum order quantity | 10 units |
| Dispatch time | Usually 7–10 working days |
| Product code | EL-PET-1413 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
How Does It Compare with the Fully Controlled Version?
| Model | Bridge | Triggering cards | Driver circuits and firing |
|---|---|---|---|
| This trainer (EL-PET-1413) | Three-phase half-controlled thyristorized bridge | Three cards for the positive group of three thyristors | Three driver circuits with pulse transformers; dual-gate firing, 3 nos. |
| Three Phase Fully Controlled Thyristorized Bridge Converter | Three-phase fully-controlled thyristorized bridge | Three cards for the positive group plus another card for the negative group of three thyristors | Six driver circuits with pulse transformers; dual-gate firing, 6 nos. |
Choose this board when the syllabus covers the three-phase half-controlled bridge, where the triggering cards work on the positive group of three thyristors. The fully controlled version adds a card for the negative group and doubles the driver circuits, for courses that study the fully controlled bridge instead.
What Is the Three Phase Half Controlled Bridge Converter Used For?
A three-phase half-controlled bridge, or semi-converter, has thyristors in one group and diodes in the other, so the DC output can be varied through the firing angle but cannot be reversed; it rectifies only and cannot invert. It is a core experiment in power electronics laboratories for diploma and degree courses in electrical and electronics engineering. In this kind of firing circuit the zero crossing detector synchronises an integrator ramp to each phase voltage, and the comparator sets the firing instant against a control level, here adjusted with the potentiometer. Experiments that can be performed:
- Nature and generation of the control signal for the three-phase controlled rectifier
- Operation of the three-phase controlled bridge rectifier with an R load
- Operation of the three-phase controlled bridge rectifier with an R-L load
- Effect of the freewheeling diode on the output waveform
What to Specify When Ordering
- Model — this half-controlled board or the fully controlled three-phase version.
- Oscilloscope — a separate item that can be quoted on the same enquiry.
- Quantity — the number of trainers for your power electronics lab.
Frequently Asked Questions
What mains supply does the trainer need?
A three-phase 415 V, 50 Hz AC supply. The board switches it through a three-pole power contactor with a push-to-ON switch and protects it with a four-pole MCB.
Is an oscilloscope needed for the experiments?
Yes. A 20 MHz dual trace cathode ray oscilloscope, used unearthed, is needed to view the waveforms, and the board has unearthed mains sockets for powering it. The oscilloscope is a separate item.
How are voltage and current measured?
Two 3½-digit digital panel meters on the board measure voltage and current.
Why is a freewheeling diode included?
Across an inductive load it gives the load current a path when the output voltage would otherwise go negative, which changes the output waveform and keeps the current flowing more smoothly; one of the experiments studies this effect.
What information is needed for an export quotation?
Please state the number of trainers, the destination country and port or city, the delivery terms you want (for example FOB or CIF), any packing or labelling requirements and the tender reference if there is one.
Who manufactures this bridge converter trainer?
JLab — Jain Laboratory Instruments Pvt Ltd — builds it in Ambala, Haryana, India, and quotes for it as the manufacturer.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, a power electronics and electrical trainer manufacturer in India, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. The trainer is assembled at JLab’s own works and not bought in from a trader, so engineering colleges, polytechnics, dealers and importers deal with the manufacturer directly, every unit is visually inspected before dispatch, and repeat orders return to the same team. JLab exports worldwide and ships to buyers in every region — El Salvador in Central America and the Caribbean, France in Western Europe, Liberia in West Africa, Armenia in Eastern Europe and Samoa in Oceania, for example. Tender details are on the JLab lab tenders page.
Related Power Electronics Trainers
- Single Phase Half Controlled Symmetrical — a single-phase board for half-controlled symmetrical and asymmetrical bridge converters.
- Single Phase Fully Controlled Bridge Converter — a single-phase bridge of four SCRs with UJT firing.
- Silicon Controlled Rectifier — for SCR gate firing, anode current, holding current and phase firing characteristics.
- Dual Trace Oscilloscope — a DC to 20 MHz two-channel cathode ray oscilloscope, quoted separately.
See all Power Electronics Trainers or the full Electronics Lab Equipments range.
Request a Quote
Use the Add To Cart enquiry button or the contact page to request a quotation, with the number of trainers, the delivery destination and any oscilloscope or other power electronics boards to be quoted together.
Last updated: 22 October 2026
