Single Phase Half Controlled Symmetrical Manufacturer,Supplier and Exporter in India
Product Code : EL-PET-1431
Jlab Export is a leading Single Phase Half Controlled Symmetrical Manufacturer,and suppliers in India
Single Phase Half Controlled Symmetrical (code EL-PET-1431) is a power electronics training board for studying single-phase half-controlled bridge converters, and obtaining their waveforms, in both the symmetrical and the asymmetrical arrangement. A built-in isolation transformer protects external instruments that are not themselves isolated. JLab — Jain Laboratory Instruments Pvt Ltd — builds this trainer at its works in Ambala, India.
Specifications
| Parameter | Detail |
|---|---|
| Experiments | Study and obtain the single-phase half-controlled symmetrical bridge converter; study and obtain the single-phase half-controlled asymmetrical bridge converter |
| Isolation transformer | 230 V AC at 200 mA; protects external instruments from damage if they are not isolated |
| AC supply | 6 V AC at 100 mA |
| DC supply | ±12 V DC at 100 mA, fixed regulated |
| Op-amps | Two op-amp ICs |
| Logic ICs | Quad Ex-OR gate IC; triple 3-input AND gate IC; hex inverter gate IC; quad two-input AND gate IC |
| Transistors | Three NPN |
| SCRs | Two |
| Reference adjustment | Potentiometer for reference voltage adjustment |
| Pulse transformers | Two, 1:1 |
| Bulb | 40 W |
| Other components | Adequate number of other electronic components |
| Mains controls | Mains ON/OFF switch, fuse and jewel light |
| Mains supply | 230 V ±10%, 50 Hz AC |
| Patch cords | Adequate number, stackable, 4 mm spring-loaded plugs, ½ metre long |
| Terminals | Terminals and sockets on the panel for connections and observation of waveforms |
| Operating instructions | Detailed: object, theory, design procedures, report suggestions and book references |
| Weight | 7 kg (approx.) |
| Dimensions | W 412 × H 150 × D 310 |
| Other apparatus required | Dual-trace cathode ray oscilloscope, 20 MHz (unearthed) |
| Quality check | Each board 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-1431 |
| Manufacturer | Jain Laboratory Instruments Pvt Ltd (JLab) — OEM |
| Country of origin | India (made in Ambala, Haryana) |
What Is the Half Controlled Bridge Board Used For?
A half-controlled bridge uses two SCRs and two diodes, so it has fewer thyristors to fire than a fully controlled bridge while still giving a variable DC output; the trade-off is that its average output voltage cannot be reversed. Where the two SCRs sit in the bridge gives the symmetrical and asymmetrical arrangements, which differ in how the load current freewheels and how the devices share conduction, and obtaining the waveforms of both on one board lets students compare them side by side. Half-controlled bridges are common in DC motor supplies and battery chargers, and the board fits power electronics practicals in electrical engineering courses.
What to Specify When Ordering
- How many boards you need.
- Whether an oscilloscope should be added to the quotation.
- Related converter trainers, such as the fully controlled bridge or the op-amp and gate firing circuit board, if you are equipping a converter laboratory.
- Destination, delivery terms and any tender reference.
Frequently Asked Questions
What is the difference between the symmetrical and asymmetrical arrangements?
In the usual textbook definitions, the symmetrical bridge has its two SCRs as a common-cathode pair and its two diodes on the other side, so each half-cycle path contains one SCR and one diode. The asymmetrical bridge has both SCRs in one leg and both diodes in the other leg, so the diodes also provide the freewheeling path for the load current.
How are the gate pulses produced?
By a firing circuit built from two op-amp ICs and four logic-gate ICs — quad Ex-OR, triple 3-input AND, hex inverter and quad two-input AND — with three NPN transistors and two 1:1 pulse transformers. A potentiometer adjusts the reference voltage.
Which supplies are built in?
The board runs from 230 V ±10%, 50 Hz mains and has a 230 V AC, 200 mA isolation transformer, a 6 V AC, 100 mA supply and a ±12 V DC, 100 mA fixed regulated supply.
What other apparatus is required?
A 20 MHz dual-trace cathode ray oscilloscope of the unearthed type. JLab’s 20 MHz dual-trace oscilloscope is linked below as a separate item.
How does it differ from the Single Phase Fully Controlled Bridge Converter?
That board has four SCRs, with two UJTs, two 1:1:1 pulse transformers and two firing-angle potentiometers on its firing side. This board has two SCRs, an op-amp and logic-gate firing circuit, and covers both the symmetrical and asymmetrical half-controlled bridges.
What should an export enquiry include?
The number of boards, the destination country and port or city, your preferred delivery terms (for example FOB or CIF), packing or labelling instructions, and the tender reference for a tender purchase.
Who manufactures this half-controlled bridge trainer?
JLab (Jain Laboratory Instruments Pvt Ltd) manufactures it at its works in Ambala, Haryana, India.
OEM Manufacturer
JLab is the trading name of Jain Laboratory Instruments Pvt Ltd, an Indian maker of power electronics trainers and laboratory equipment, incorporated in 2017 and based on Hargolal Road, Ambala, Haryana. This bridge trainer is built at JLab’s own works rather than bought from a trading firm, so engineering colleges, polytechnics, dealers and importers buy it direct from the manufacturer; each unit is visually inspected before dispatch, and repeat orders and spares are dealt with by the maker. JLab exports worldwide and ships to buyers in every region — for example Iceland in Northern Europe, DR Congo in Central Africa, Honduras in Central America and the Caribbean, Bhutan in South Asia and France in Western Europe. Tender details can be found on the JLab lab tenders page.
Related Converter Trainers
- Single Phase Fully Controlled Bridge Converter — a four-SCR single-phase bridge with UJT firing.
- Firing Circuit Using OP AMPS And Gates — for studying how a single-phase converter’s gate pulses are produced with op-amps and logic gates.
- SCR Converters and Reactive Loads — half-controlled and fully controlled bridges under reactive loads, with the action of a freewheeling diode.
- Three Phase Half Controlled Thyristorized Bridge Converter — the three-phase counterpart, studied with R and R-L loads and a freewheeling diode.
- SCR Triggering Circuit — controlled gate pulses from a signal conditioner and pulse generator IC.
- Dual Trace Oscilloscope — a 20 MHz dual-channel oscilloscope.
Explore the Power Electronics Trainers range or all Electronics Lab Equipments.
Request a Quote
Ask JLab for a quotation with the Add To Cart enquiry button on this page or through the contact page, stating how many boards you need, where they should be delivered and whether an oscilloscope or companion trainers should be included.
Last updated: 22 October 2026
