High-stability, Current-controlled, Card-based, Unipolar, Switch-mode Power Converter for Electromagnets
Fig 1
Fig 2
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.
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1 Fig 1
2 Fig 2
Brief Description
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.
Salient Features
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 |
: |
·       Â
3 mm LED indicators for indication of auxiliary supply, power
converter ON/OFF, faults ·       Â
Three test jacks to measure current set reference, current
readback ·       Â
A push-button to reset the fault ·       Â
9-pin sub-D connector to monitor more signals for
diagnostics ·       Â
25-pin sub-D connector for interfacing the power converter
for remote operation |
Protections |
: |
·       Â
In-rush current limit via NTC thermistor ·       Â
Fuse for input overcurrent / short-circuit protection ·       Â
Latched fault for power converter over-current protection |
Cooling |
: |
Air natural |
Â
Advantages
·       Â
Standardized design to cater to various rating within
the specified limits with minimum modifications
·       Â
Since it is a single-board design, the manufacturing
process is industry-friendly
·       Â
Commonly available components and processes involved
·       Â
Commonly available infrastructure in an industry
manufacturing electronic systems is sufficient. Minimum investment needed to
set-up additional infrastructure, if any.
·       Â
Demonstrated repeatable performance in manufacturing,
testing and performance in industry.
·       Â
Rugged, reliable power converter
·       Â
Output current stability within +/- 100 ppm.
·       Â
Compliant to conducted EMI.
·       Â
Output polarity reversal feature
·       Â
Easily accessible important signal for in-situ
monitoring and diagnosis.
Â
Areas of Application
The
power converter is useful to energize electromagnets in particle accelerators
and associated beam transport lines used typically for:
·       Â
Food irradiation
·       Â
Industrial processes like sterilization of medical products,
etc.
·       Â
Material processing and modifications
·       Â
Medical applications
·       Â
Cargo scanning
·       Â
Basic research
1 Fig 1
2 Fig 2
Brief Description
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.
Â
Process
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.
Â
Advantages
·       Â
Standardized design to cater to various rating within
the specified limits with minimum modifications
·       Â
Since it is a single-board design, the manufacturing
process is industry-friendly
·       Â
Commonly available components and processes involved
·       Â
Commonly available infrastructure in an industry
manufacturing electronic systems is sufficient. Minimum investment needed to
set-up additional infrastructure, if any.
·       Â
Demonstrated repeatable performance in manufacturing,
testing and performance in industry.
·       Â
Rugged, reliable power converter
·       Â
Output current stability within +/- 100 ppm.
·       Â
Compliant to conducted EMI.
·       Â
Output polarity reversal feature
·       Â
Easily accessible important signal for in-situ
monitoring and diagnosis.
Â
Areas of Application
The
power converter is useful to energize electromagnets in particle accelerators
and associated beam transport lines used typically for:
·       Â
Food irradiation
·       Â
Industrial processes like sterilization of medical products,
etc.
·       Â
Material processing and modifications
·       Â
Medical applications
·       Â
Cargo scanning
·       Â
Basic research
Salient Features
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 |
: |
·       Â
3 mm LED indicators for indication of auxiliary supply,
power converter ON/OFF, faults ·       Â
Three test jacks to measure current set reference, current
readback ·       Â
A push-button to reset the fault ·       Â
9-pin sub-D connector to monitor more signals for
diagnostics ·       Â
25-pin sub-D connector for interfacing the power converter
for remote operation |
Protections |
: |
·       Â
In-rush current limit via NTC thermistor ·       Â
Fuse for input overcurrent / short-circuit protection ·       Â
Latched fault for power converter over-current protection |
Cooling |
: |
Air natural |
Â
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.
SR NO. | COUNTRY NAME | PATENT NUMBER | |||||||||||
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SR NO. | NAME | STANDARD NUMBER | LOGO | ||||||||||
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General License Fee : ₹ 135,000.00 (One Lakh Thirty Five Thousand)
General Royalty : 0%