The 3474 Dipole Electromagnet accepts a range of pole caps with face diameters up to 250mm and has a pole gap that may be manually adjusted from 0 to 160mm. The 3474 is recommended when high fields and or high uniformity are needed. Available options include mount orientation, motorized rotation, zero field Bias Coils, and precision pole gap spacing.
- 140 or 280 Amp Versions
- Adjustable Pole Gap
- Wide Variety of Pole Caps
- Air or Water Cooled
- Many Mounting Options
- Hall Effect Studies
- Magneto-Optical Studies
- Laboratory Experiments
- Magnetic Separation experiments
- Magnetic alignment of small components
- Studying chemical reaction rate changes
- Model 3474 Users Manual
- 5972 Magnet Control
- Motorized Rotating Drive Users Manual
- LabVIEW Magnet Control Software Users Manual
- Model 5970 Current Reversal Switch [Discontinued]
- Model 5971 Current Reversal Switch
- Group3 ADI-123 GUXCTS Analog Device Interface
- Facility Requirements and Installation Check List – North America
- Sorensen SG Series Power Supply Operation Manual
- Sorensen SG Series Power Supply Datasheet
- BV Thermal Mercury Series Water Chiller manual
- 3D Model, 3474 Electromagnet
- 3D Model, 11900990 Rotating Base
- 3D Model, 11801800 Rolling Base
- Solidworks eDrawings Viewer for .EPRT files (free download; MS Windows 7, 8, 10)
- Autodesk A360 Viewer for .STEP files (browser based; free with registration)
Power Supplies and Current Reversal
We offer several different power supplies for the 3472 electromagnet; the Amtek switch mode, and the Danfysik high stability linear.
The Amtek switch mode power supplies feature a stability of 0.05% over 8 hours and they are available with an optional IEEE-488 interface. Order part numbers:
Input: 187-242V, 62A, 47-63Hz ac, 3 phase [Datasheet]
SGA100/150C-0AAA - Power Supply, 100V, 150A, unipolar, 0.05% / 8hrs
SGA100/150C-1AAA - Power Supply, 100V, 150A, unipolar, 0.05% / 8hrs, IEEE-488 interface
SGA100/200C-1AAA - Power Supply, 100V, 200A, unipolar, 0.05% / 8hrs, IEEE-488 interface
Input: 190-253Vac, 47-63Hz ac, 3 phase
Input: 342-440V, 40A, 47-63Hz ac, 3 phase [Datasheet]
SGA100/150D-0AAA - Power Supply, 100V, 150A, unipolar, 0.05% / 8hrs
SGA100/150D-1AAA - Power Supply, 100V, 150A, unipolar, 0.05% / 8hrs, IEEE-488 interface
If field reversal is required when using a a unipolar Power Supply, we offer the 5971-160 Current Reversal Switch. This Switch provides a safe way of reversing the magnets current under either manual or computer control. The USB Interface also provides control fo the Power Supply current, and readback of the Power Supply current and voltage. It will also provide field readback from a Senis Field Transducer if installed.
Magnet Current Cables
We take the trouble out of connecting your magnet to the power supply with a wide variety of pre-terminated cable assemblies.
Power Supply direct to Magnet:
16907-0053-1 - Cable, Current & Interlock, 853-160A/80V to 3474, 160A, 5m.
Power Supply to Reversing Switch:
16907-0062-1 - Cable, Current & Interlock, P83C-60110A to 5970-160, 160A, 2m
Reversing Switch to Magnet:
169000-0053-2 - Cable, Current & Interlock, 5970-160 to 3474, 160A, 5m.
Magnet Poles and Axial Holes
GMW Offers a range of Pole Caps for the 3474 Electromagnet from 25mm to 250mm. Order by part numbers as listed below:
17801717 - Single Pole Cap, 25mm.
17801716 - Single Pole Cap, 50mm.
17801715 - Single Pole Cap, 75mm.
17801714 - Single Pole Cap, 100mm.
17801713 - Single Pole Cap, 150mm.
17801712 - Single Pole Cap, 200mm.
17801711 - Single Pole Cap, 250mm.
For optical experiments or other applications where an axial hole in one or both poles is required, GMW can provide the poles with the hole pre-drilled to your specifications. Order part:
3473-AH - Axial hole in one pole, diameter to be specified.
Higher field uniformity may be achieved with a set of precision ground pole spacers. These spacers come three to a set and include a delrin spacer ring assembly to accurately locate the spacers. This ring assembly may be machined to hold experiment fixtures, and may even include a set of Bias Coils.
11900460-50 - Spacer Assemby, 50mm gap, for 200mm poles.
Bias Coils are used for two different applications with electromagnets; obtaining a 'zero' field, or superimposing a modulated signal on the field.
For achieving a zero field, the bias coils are used with a fixed DC power supply, and set to generate a 'negative' field when the main magnet power supply is stitched off. The the main magnet power supply may then be programmed to any field from zero upwards to the magnet power supply maximum.
For field modulation, the bias coils may be used with a low power bipolar power supply such as the Kepco BOP 100-1D. Note that our magnets are of a solid yoke design, so the modulation aplitude and frequency will be limited by eddy currents.
5485 - Bias and Modulation Coil pair.
EP030MX100-230 - DC Power Supply for 5484 Bias Coil pair, 0-30V, 1A.
Mounting and Motor Drives
We are pleased to offer several mounting options for the 3473 Electromanget. They range from 45° Angle Brackets, Horizontal and Vertical Mounting Brackets, and Rolling, Rotating, or Rolling and rotating bases. A guide rail is also available to guide the rolling bases between magnet test stations.
17802690 Vertical Mount Bracket Pair, for 3474.
17801730 45° Mounting Bracket pair for 3474
11801800 Rolling base, for 3474.
11900990 Rotating base, for 3474.
11900980 Rolling and Rotating Base for 3474.
We have also designed a motorization kit for the rotating base. This item includes all required hardware to add a computer controlled motor assembly to the rotating base. It features variable speed, limit switches, a 'home' switch, and a clutch to help prevent the system from being damaged should the mechanism jam. Order part:
3474-MRD - Motorized Rotating Drive for Rotating Base.
GMW-RC-1920 GMW 19" EIA rack cabinet. This handsome half-height 19" rack cabinet provides ample space for your power supply, reversing switch, and other instrumentation.
It is two-tone gray, and is supplied with lift off side panels, castors, and a door mounted on to the back. The door includes two line powered cooling fans to help draw hot air out of the rack. It does not include filler panels and support angles.
P-0119 - Filler panel, 1U, light gray.
P-0319 - Filler panel, 2U, light gray.
P-0519 - Filler panel, 3U, light gray.
P-0719 - Filler panel, 4U, light gray.
P-0819 - Filler panel, 5U, light gray.
SA-30 - Support Angle Pair.
HW-1 - Hardware kit, screws and washers, set of 100.
Software and PC Interface Cards
LVPTMPS - Driver for SGA power supplies with IEEE-488 interface.
LVKCMPS - Driver for Kepco power supplies with IEEE-488 interface.
LVMCTRL - Driver for complete closed-loop control of magnet system, power supply, and teslameter (gaussmeter) drivers.
* Note: The above listed drivers require LabVIEW 8.21 or newer version.
776670-09 - National Instruments LabVIEW Full System for Windows with 1 Yr Service (English).
778927-01- USB-GPIB Interface for Windows XP/Vista/7/8/10.
Systems & Pricing
Terms and Conditions
Terms and Conditions:
Prices above are for domestic deliveries to USA and Canada only.
Prices to other Countries are approximately 1.1x USA List Price.
Prices are expressed in U.S. Dollars, FCA San Carlos, California.
Prices are subject to change without notice.
OEM discounts are available.
Visa, MasterCard, Amex, Prepayment before shipment, or Net 30 days (subject to credit acceptance).
Stock to 90 days.