Model 430 Power Supply Programmer

Model 430 Power Supply Programmer
Model 430 Power Supply Programmer
and
Integrated
Magnet Power
Supply Systems
Shown here: AMI’s most popular Magnet Power
Supply System, the Model 4Q06125PS-430
Model 430 Programmer
Integrated Power Supply Systems
The AMI Model 430 Power Supply Programmer is a
sophisticated digital power supply controller that allows an
operator to manage a superconducting magnet system
with unprecedented accuracy and ease. The Model 430 is
designed to control a wide range of single, dual, and fourquadrant linear and switching power supplies. The most
frequently used functions are accessible via single
keystroke or shift plus keystroke. For other functions, a
menu driven format guides the user to enter inputs using
the push button front panel interface.
AMI Integrated Magnet Power Supply Systems incorporate
the digitally based Model 430 Power Supply Programmer
which provides simplified, flexible operation with precise
low drift magnet current control. Standard systems are
mounted in rugged 19” rack-style cabinets. Standard 4quadrant systems range from 5 A to 250 A, while the
standard bipolar current ratings range from 100 A to 500 A.
Bipolar systems incorporate the AMI Model 601 Energy
Absorber to achieve bipolar operation and allow fast ramp
down with a unipolar power supply.
Multi-axis Systems
Multiple Model 430 Power Supply Programmers can control a multi-axis magnet system for virtual rotation of
the magnetic field. An infinite combination of field vectors is possible when the coils of the multi-axis magnet
system are energized and controlled independently and simultaneously.
Model 430 Power Supply Programmer Specifications for AMI’s Standard Systems @ 25oC
Magnet Current Control Parameter
±5 A
Accuracya (A) with Standard Shunt System:
0.002
Standard Model 430 Configurations: Programmable Limits
±10 A
+100 A ±125 A +200 A ±250 A
+300 A +500 A
c
Accuracy (A) - High Stability System: 0.00025
a
Stability (A) with Standard Shunt System: 0.001
d
0.04
0.05
0.0005
0.005
d
d
0.002
c
Stability (A) - High Stability System: 0.00005
a
0.004
b
0.08
0.1
0.0063
0.01
0.0125
d
d
0.02
0.025
d
b
n/a
n/a
0.015
0.025
b
b
0.04
0.05
n/a
n/a
0.0001
0.001
0.00125
0.002
0.0025
0.003
0.005
Minimum Ramp Rate (mA/min):
0.01
0.01
0.01
0.1
0.1
0.1
0.1
0.1
Maximum Ramp Rate (A/sec):
1
1
1
10
20
20
30
30
b
After 20 minutes; stability and accuracy of systems 250 A and less are improved more than a factor of 10 with the optional high-stability (flux-gate) system.
Systems larger than 250 A include the high stability (flux-gate) option as the standard configuration.
c
d
After 10 minutes;
Drift is further reduced to half that shown after 60 minutes.
b
Model 430 Features
1
• Parameter for setting persistent switch cool time
• Galvanically isolated Program Output signal to prevent ground loops
• Ultrahigh resolution and accuracy
• Multifunction vacuum fluorescent display (VFD)
• Intuitive user operation and comprehensive manual
2
• Upper current limit and voltage limit settings
• Menu driven user interface and keypad – logical and intuitive
• One touch Ramp/Pause button
• Easy to read digital Vm/Vs (magnet and supply voltage) display meter • Digital readout in Field (kilogauss or Tesla) or Current (Amperes)
• Can automatically determine inductance of load
• Control multiple parallel or series configured supplies
• Drivers for LabView
• Front panel indication that current is flowing in magnet leads
• User-adjustable threshold quench detection with detection I/O
• Velocity sensitive encoder dial for fine adjustments
• Automatic ramp down and quench inputs
• Programmable piecewise-continuous ramping with 10 currentdependent rates
• Output signals to helium level and temperature instruments via internal wiring from the magnet station connector
• Integrated DB-25 magnet
station connector with wired
DB-25 output signals available
for other system devices
3
• Built-in Ethernet and RS-232 communication interfaces
• Ethernet port allows access to the Programmer across a local network or via the Internet
• Operating software is stored in flash memory and can easily be updated via the Ethernet or RS-232 ports
1
Important for conduction-cooled magnets (dry switch) when a relatively long time is required to cool as compared with wet switches.
Manual is conveniently available in the Model 430 firmware (pdf format) - just access the instrument’s IP address via a web browser.
3
An optional external conversion unit is available for interfacing the RS-232 serial port to a GPIB bus.
2
Simplified Operation
Most frequently used functions are accessible via single keystroke or shift plus keystroke. The front panel velocity-accelerated rotary encoder
dial also allows the operator to make fine adjustments to operating parameters of the magnet system. Magnet system signal wiring, such as
magnet voltage/current, helium levels, and temperatures, connect to the rear panel through a single DB-25 connector. Multiple connectors on
the rear panel allow the user to route the signals to the appropriate instruments at the control station; the need for complicated wiring
between the cryostat and magnet control station is thus eliminated.
Digital Control
The digitally-based Model 430 incorporates very high resolution analog <> digital converters and digital signal processing (DSP) to achieve
excellent stability, precise control, and superior current resolution of the programmed magnetic field. An internal microcomputer manages all
computations, analog data conversion, display/keypad functions, communications I/O, and analog power supply programming signals.
High Resolution and Stability
Precision instrumentation techniques and potentiometer-free designs are employed throughout the instrument to ensure accurate signal
translation for a wide range of conditions. The magnet current is sampled at a resolution of 15.6 µA (for a 125 A supply) and is front-panel
programmable in 0.1 mA increments. A further order of magnitude in accuracy and stability can be achieved by choosing the optional
fluxgate based current measurement system in place of the standard resistive shunt.
Magnet Control and Protection
The Model 430 protects the magnet from runaway supply voltage/current or operator error. The quench detect function, with user-adjustable
quench sensitivity, is designed to detect a magnet quench and quickly stop power from being delivered to the resistive magnet. The system
can optionally incorporate an AMI Liquid Helium (LHe) Level Instrument to prevent magnet quenching due to low LHe level; automatic ramp
down of the magnet (even in persistent mode) is initiated if the LHe level drops to a preset level.
A system administrator can program the instrument (from the front panel or remotely) with password protected operational limits or any other
parameter(s) which can thereafter not be exceeded or changed without the password. During operation of the system, if the operator
inadvertently attempts to take the magnet system to an excessive magnetic field strength or excessive voltage, the Programmer will not
accept the parameter and will alert the operator that the value exceed the limits.
The Model 430 automatically determines and sets the proper persistent switch heater current (range: 0 to 100 mA; compliance 13.5 V). The
persistent switch heater circuit is continually monitored and the user is notified of circuit problems. The Model 430 Programmer automatically
controls the power supply and persistent switch heater to aid the user in safe and quick transitions in and out of persistent mode.
For single quadrant operation (I+, V+) the Model 430
Programmer can control various unipolar switching or linear
supplies. Shown here is the AMI Model 08150PS-430 1200 watt
switching supply combination. This system offers great value,
small size, and minimum heat generation. The Model 430
Programmer has also been tested on older supplies such as the
HP6260B linear power supply; it can breathe new life into your
system by offering state of the art control capability.
Bipolar operation (I+, V-/+) is obtained by adding a Model 601
Energy Absorber unit to take full advantage of programmed
magnetic field profiles, and other situations requiring fast ramp
down rates.
AMI’s lowest-power standard bipolar power supply system, designated 05100PS-430-601, has the Model 08150PS configured at 100 A/ 10
V, and in conjunction with the Model 601, supplies 100 A at 5 V to the load. The system comes mounted in a 19” rack style cabinet.
Specifications for this and other standard AMI bipolar systems are outlined below. AMI’s highest-power standard bipolar power supply
system, the Model 05500PS-430-601, is pictured on the last page of this brochure. Other ratings and configurations are available.
Specifications – Standard Cabinet Mounted Bipolar Power Supply Systems
b
Approximate
Maximum
Typical
Output
Dimensions
a
c
Noise
Power
Weight
Input Power
hxwxd
Maximum Maximum
Current
Voltage
System
05100PS-430-601:
+100 A
±5 Vdc
500 VA
1500 VA
75 mV p-p
12.5" x 21.0" x 24.5"
70 lb (32 kg)
05200PS-430-601:
+200 A
±5 Vdc
1000 VA
3000 VA
75 mV p-p
25.0" x 23.6" x 23.6"
165 lb (75 kg)
05300PS-430-601:
+300 A
±5 Vdc
1500 VA
4500 VA
75 mV p-p
30.3" x 23.6" x 23.6"
215 lb (98 kg)
+500 A
±5 Vdc
2500 VA
7250 VA
75 mV p-p
47.2" x 21.3" x 24.5" 330 lb (150 kg)
05500PS-430-601:
a
Includes Model 430 and Model 601
b
Rack/cabinet dimensions; h = height; w = width; d = depth
c
Includes rack/cabinet
For true high-current four-quadrant operation (I+/-, V+/-) the Model
430 is configured with the Model 4Q06125PS Power Supply to
provide smooth, linear sweeps through zero current with constant
ramp rates across the entire operating range. The magnet system
can easily be fine tuned by making precise adjustments to the current
through the use of the convenient velocity sensitive encoder dial. This
system, designated 4Q06125PS-430, comes standard in a 19” rack
style cabinet, and is depicted on the cover page of this brochure.
For higher voltage or current, series and parallel configurations of the
4Q06125PS are available (designated 4Q12125PS-430 and
4Q06250PS-430). For smaller magnets, four quadrant power supply
systems
(designated
4Q1005PS-430
and
4Q1010PS-430)
incorporate the smaller Kepco BOP supplies and are offered for
smaller magnet requirements. Specifications for standard AMI four
quadrant systems are outlined below.
Other ratings and configurations are available.
Specifications – Standard Cabinet Mounted Four Quadrant Power Supply Systems
b
Approximate
Maximum
Typical
Maximum Maximum Output
Dimensions
a
c
Noise
Current
Voltage
Power Input Power
Weight
hxwxd
System
4Q06125PS-430:
±125 A
±6 Vdc
750 VA
2000 VA
120 mV p-p
12.5" x 21.0" x 24.5"
100 lb (46 kg)
4Q06250PS-430:
±250 A
±6 Vdc
1500 VA
3800 VA
120 mV p-p
19.5" x 21.0" x 24.5"
200 lb (91 kg)
4Q12125PS-430:
±125 A
±12 Vdc
1500 VA
3800 VA
240 mV p-p
19.5" x 21.0" x 24.5"
200 lb (91 kg)
4Q1005PS-430:
±5 A
±10 Vdc
50 VA
700 VA
10 mV p-p
12.5" x 21.0" x 24.5"
85 lb (39 kg)
±10 A
±10 Vdc
100 VA
1200 VA
10 mV p-p
12.5" x 21.0" x 24.5"
85 lb (39 kg)
4Q1010PS-430:
a
Includes Model 430
b
Rack/cabinet dimensions; h = height; w = width; d = depth
c
Includes rack/cabinet
The Internet Protocol Model 430IP Power Supply Programmer
With no front panel controls except the power On/Off switch, the Model 430IP is designed for fully
functional magnet system control via the rear panel Ethernet connection using TCP/IP with a web browser.
Control can be established through a locally connected computer or remotely through a network or even the Internet; the
human/machine interface is a web browser depiction of the Model 430. This is especially useful for multi-axis systems where a
computer is an inherent part of the system. The IP-capable firmware can also be applied to the standard Model 430 with front
panel controls – in this case the computer-displayed Model 430 mirrors and controls all hardware front panel devices with the
exception of the ac input power switch. The following is a screen-shot of the Model 430IP being controlled with a web browser.
Selecting an AMI Power Supply System
1
Bipolar (Magnet Voltage -5 V to +5 V)
05500PS-430-601
05300PS-430-601
05200PS-430-601
05100PS-430-601
0A
100 A
200 A
1
Available for fast discharge of magnet.
300 A
400 A
500 A
Four Quadrant High Current (Magnet Voltage -6 V to +6 V)
4Q06250PS-430
4Q06125PS-430
-300 A -200 A
-100 A
0A
100 A
200 A
300 A
Four Quadrant High Current (Magnet Voltage -12 V to +12 V)
4Q12125PS-430
-200 A
4Q12125PS-430
-100 A
0A
100 A
200 A
Four Quadrant Low Current (Magnet Voltage -10 V to +10 V)
4Q1010PS-430
4Q061
25PS
-10 A
-5 A
4Q1005PS-430
0A
5A
10 A
Model 05500PS-430-601 System
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