The power converter is capable of delivering output voltage (up to 50 V DC), output current (up to 15 A DC), and output power (up to 300 W) ratings with minimum alterations. It operates from 230 V, 50 Hz ac mains. The power converter is developed on a single 6U double-sided PTH PCB, complete with power circuit, control electronics and interface electronics for its remote operation. It is equipped with precision current sensor, electronics and on-board constant-temperature bath that provides output current stability within +/- 100 ppm of the full-scale current (for 8 hours after 1 hour of warm-up). Further, a controlled electromechanical switch is provided at the output that facilitates the output polarity reversal. Important signals are available on the front panel facilitating in-situ diagnosis/monitoring of the operational status.

Input Voltage	230 V ± 10%, 50 Hz±3%, single-phase, three-wire (L,N,E) ac mains (for power electronics) 18 V – 0 – 18 V ± 10%, 50 Hz±3%, 0.5 A ac (for control electronics)
Maximum Output Voltage	50 V DC
Maximum Output Current	15 A DC
Output Polarity	Unipolar. Off-line reversal of polarity is possible by in-built polarity reversal switch.
Maximum Output Power	300 W
Load	Resistive or resistive-inductive (electromagnet)
Output Current Stability	Within ±100 ppm of the full-scale current for 8 hours after 1 hour warm-up
Form Factor	Standard 19-inch rack compatible 6U, 12 T card of 220 mm depth
Connector	Hybrid (power + control pins) EURO connector
Front Panel	6U, 12 T fascia plate
Front Panel Accessories	3 mm LED indicators for indication of auxiliary supply, power converter ON/OFF, faults Three test jacks to measure current set reference, current readback A push-button to reset the fault 9-pin sub-D connector to monitor more signals for diagnostics 25-pin sub-D connector for interfacing the power converter for remote operation
Protections	In-rush current limit via NTC thermistor Fuse for input overcurrent / short-circuit protection Latched fault for power converter over-current protection
Cooling	Air natural

The power converter is capable of delivering output voltage (up to 50 V DC), output current (up to 15 A DC), and output power (up to 300 W) ratings with minimum alterations. It operates from 230 V, 50 Hz ac mains. The power converter is developed on a single 6U double-sided PTH PCB, complete with power circuit, control electronics and interface electronics for its remote operation. It is equipped with precision current sensor, electronics and on-board constant-temperature bath that provides output current stability within +/- 100 ppm of the full-scale current (for 8 hours after 1 hour of warm-up). Further, a controlled electromechanical switch is provided at the output that facilitates the output polarity reversal. Important signals are available on the front panel facilitating in-situ diagnosis/monitoring of the operational status.

So far 80 units have already been produced and qualified in an industry at different times. Since it is a single-board design, the manufacturing process is industry-friendly. Special manufacturing infrastructure / environment / processes are not required. Standard PCB production, assembly, winding and testing techniques are applicable. All components are normal through-hole component and are available in Indian market.

1. Standardized design to cater to various rating within the specified limits with minimum modifications
2. Since it is a single-board design, the manufacturing process is industry-friendly
3. Commonly available components and processes involved
4. Commonly available infrastructure in an industry manufacturing electronic systems is sufficient. Minimum investment needed to set-up additional infrastructure, if any.
5. Demonstrated repeatable performance in manufacturing, testing and performance in industry.
6. Rugged, reliable power converter
7. Output current stability within +/- 100 ppm.
8. Compliant to conducted EMI.
9. Output polarity reversal feature
10. Easily accessible important signal for in-situ monitoring and diagnosis.

The power converter is useful to energize electromagnets in particle accelerators and associated beam transport lines used typically for:

1. Food irradiation
2. Industrial processes like sterilization of medical products, etc.
3. Material processing and modifications
4. Medical applications
5. Cargo scanning
6. Basic research
   

Input Voltage	230 V ± 10%, 50 Hz±3%, single-phase, three-wire (L,N,E) ac mains (for power electronics) 18 V – 0 – 18 V ± 10%, 50 Hz±3%, 0.5 A ac (for control electronics)
Maximum Output Voltage	50 V DC
Maximum Output Current	15 A DC
Output Polarity	Unipolar. Off-line reversal of polarity is possible by in-built polarity reversal switch.
Maximum Output Power	300 W
Load	Resistive or resistive-inductive (electromagnet)
Output Current Stability	Within ±100 ppm of the full-scale current for 8 hours after 1 hour warm-up
Form Factor	Standard 19-inch rack compatible 6U, 12 T card of 220 mm depth
Connector	Hybrid (power + control pins) EURO connector
Front Panel	6U, 12 T fascia plate
Front Panel Accessories	3 mm LED indicators for indication of auxiliary supply, power converter ON/OFF, faults Three test jacks to measure current set reference, current readback A push-button to reset the fault 9-pin sub-D connector to monitor more signals for diagnostics 25-pin sub-D connector for interfacing the power converter for remote operation
Protections	In-rush current limit via NTC thermistor Fuse for input overcurrent / short-circuit protection Latched fault for power converter over-current protection
Cooling	Air natural

FACILITIES REQUIRED

Standard facilities available with a manufacturer of electronic systems such as PCB manufacturing, component soldering, standard mechanical shop floor for assembly etc. are necessary for production. Some of the items (e.g. magnetic components, heatsinks etc.) can also be sub-contracted by the industry if the related infrastructure is not available under the same roof. However, the manufacturer desirous of acquiring the technology should have a complete in-house board assembly facility following IPC 610. Standard test and measurement equipment (meters, oscilloscopes etc.) are sufficient. Various sources of precision meters and sensors are commercially available for the manufacturer to augment the infrastructure.