Helmholtz Coils
generate precise magnetic fields within and between it's coils.
See Also: Coil, Coil Turns, Rogowski, Magnetic Field
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Helmholtz Coils
Helmholtz coils is a candidate test apparatus for low frequency magnetic field susceptibility testing on military equipment and subsystems. Use of this coils reduce electromagnetic compatibility (EMC) qualification tests time, and subject the equipment under test (EUT) to a relatively uniform field.
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Helmholtz Coils
Helmholtz-Coils are especially designed to generate precisely defined magnetic fields from DC to the upper end of the audio frequency range and beyond. The generated fields are in a strongly linear relation to the coil current. The field- strength can be calculated exactly by analytical (or numerical) methods, based on the coils' geometry, the number of turns and the coil current.
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Standard Helmholtz Coils
Helmholtz Coils are ideal for the measurement of Rare Earth (Samarium Cobalt, Neodymium) and Hard Ferrite permanent magnet materials (materials which exhibit a relative straight line demagnetization). Our standard Helmholtz Coils are for use with fluxmeters. The Helmholtz Coil measures the magnet sample as a single magnetic moment provided that the longest dimension of the magnet sample is less than one-third (1/3) the diameter of the coil system. By definition, the magnetic moment per unit volume is the intrinsic magnetization of the sample. With our calibrated Helmholtz Coil and Integrated Fluxmeter – and given the volume of the permanent magnet sample – the intrinsic open circuit operating B (Bdi) can be measured.
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Precision Helmholtz Coils
A precision Helmholtz coil set is suitable for use with all types of permanent magnets. Constructed out of aluminum and brass with fully shielded coils, the HCP is a hand-operated, sample rotation mechanism with precise 180-degree rotation built in.
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Helmholtz Coils / Radiating Loops
Formed by a pair of conducting circular coils with many turns, each carrying a current. The coils are separated by a distance equal to the radius of the circular loops.
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Three Axis Helmholtz Coil Systems
Macintyre Electronic Design Associa
he MEDA turnkey closed loop magnetic field sources cancel the local ambient field as well as generate accurate and uniform magnetic fields in a control volume. The sources use Helmholtz coils driven by control currents to produce stable magnetic fields from 1 nT to 100,000 nT. The accuracy of the field in the control volume is better than 0.05% of the setting.
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Circular Helmholtz Coils
Helmholtz-Coils are especially designed to generate precisely defined magnetic fields from DC to the upper end of the audio frequency range and beyond. The generated fields are in a strongly linear relation to the coil current. The field- strength can be calculated exactly by analytical (or numerical) methods, based on the coils' geometry, the number of turns and the coil current.
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Helmholtz Coils (Field Standards)
Lake Shore offers four Helmholtz coils for field standards: 2.5 in, 6 in, and 12 in diameter single axis, and the MX-2X-10 double axis coil. Standard field coil (field generation). Field strengths from ˜12 G to ˜30 G. Field accuracy of 0.5%. Field uniformity of 0.5%*. Single axis configuration with 2.5 in, 6 in, and 12 in diameter coils.
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MEMS Magnetic Sensor Test
Cohu offers a big variety of magnetic test solutions applying magnetic field in all three dimensions. Depending on the requirements we can integrate coils with and without magnetic core, single- or Helmholtz coils, as well as permanent magnets, static and rotating.
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RF Helmholtz Coil
The Beehive Electronics 135A RF Helmholtz coil generates a well-controlled, uniform magnetic field. It can be used to calibrate magnetic field probes, such as the Beehive 100 series, or for testing the susceptibility of other devices to magnetic fields. The Helmholtz coil comes supplied with a fixture that makes it easy to calibrate Beehive 100 series probes.
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Power Supply
High precision analog control loop power supplies for inductive loads such as electromagnets, superconducting coils, Helmholtz coils and others.Autonomous analog power supplies with digital controls, readouts and supervision. The interfaces are digital and analog
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Magnet Testing
Helmholtz Coils
A coil arrangement consisting of two coils with the same radius or edge length is called a Helmholtz coil. At the correct distance, these coils are arranged in parallel on the same axis and current flows through them in the same direction. Their magnetic field is then characterized by a large homogeneous area in the center of the coil, which is freely accessible for experiments and measurement tasks. Helmholtz coils can have a circular or square geometric shape.
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Accessories
Hunan Linkjoin Technology Co., Ltd.
Linkjoin accessories - electromagnet, core test fixture, epstein frame, DC permeameter, AC permeameter, reference magnet, magnetic flux fixture, solenoid, helmholtz coil, temperature controller, etc
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Fluxmeter
Measures changes in magnetic flux, as detected through a Helmholtz or similar coil arrangement.
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3D Helmet Coil
With the 3D Helmholtz coil system, 3-dimensional magnetic field vectors can be generated. By superimposition, it is possible to create a field-free space or an artificial earth magnetic field vector inside the coil arrangement. The coil arrangement was developed for the calibration of magnetic field sensors.
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Helmholtz and Search Coils
Standard field Helmholtz coils, magnet moment measurement Helmholtz coils, and search coils.
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Helmholtz Coil
In the measurement of magnetic fields by means of Hall probes or measuring coils it is necessary to calibrate the instruments in a known magnetic field. Our standard field coil according to Helmholtzenables to production of a magnetic field calculable with high accuracy from the dimensions and the amperage. In series arrangement with an accurate ammeter field strengths of up to 800A/cm are produced. The dield room accessible both in axial and radial direction. Helmholtz coils with fluxmeters are also useful in testing of magnets. Helmholtz coils give repeatable results as against the search coils due to which the magnets can be compared with more accuracy for their total flux and in turn their quality. Field Generating and Field Detecting Helmholtz coils are designed as per user specifications.
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Coil Analyzers
SAT Series
The Coil Analyzers SAT30A and SAT40A are powerful, lightweight units ideal for testing of circuit breakers. Substation battery is not connected or available. The SAT series instruments are intended to supply circuit breaker coils and spring charging motors. They spring charging motors (SAT40A – AC and DC) as a part of commissioning and maintenance testing.
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Coil Analyzers
Sat40a II Series
The Coil Analyzer SAT40A II series is a powerful tool for testing circuit breakers where a substation battery is not available. It is unique device in the market due to its dual purpose: - It can be used as a stable power supply for coils and spring-charging motors (both DC and AC power supply voltage) during commissioning and maintenance testing. - It is powerful analysis tool for assessing conditions of circuit breaker auxiliary circuit and coils. The Coil Analyzer SAT40A II series has separate DC and AC coil outputs for power supply of opening and closing coils. The output voltage is selectable in the ranges from 10 V to 300 V DC or from 10 V to 250 V AC. The Coils outputs can withstand up to 15 A current. The DC and AC motor outputs can generate from 10 V to 300 V DC and 250 V AC voltage. The motor outputs can withstand starting (inrush) currents up to 40 A. These outputs can also be used as continuous power supply outputs.
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Rogowski Coil
Rogowski Coils are mainly used to measure high current through the conductor. As opposed to conventional current transformers, Rogowski Coils are liner over wide range of current input. Rogowski Coils along with current meter are suitable for measurement of AC or DC current, up to a few thousand amperes. Ferrites India offers Flexible as well as hard Rogowski Coil which can accomodate wide conductor sizes.
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Coil Test System
CTS
International Electro-Magnetics, Inc.
The system is controlled by a PC using software written in Visual Basic. It offers visually oriented menus that allow easy coil configuration and test set up procedures.
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Coil Tester
It is a new impulse winding tester that incorporates high precision, a wide range of functions, various expandability, improved operability, and a full range of external communication interfaces.
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Stator & Coil Testing
Electronic Systems of Wisconsin, Inc.
ESW Stator Test Systems come fully equipped with the latest industry features. The on-screen display in our testers allows the operator to visually see the part lead hook-up to the tooling connections. Our software makes it easier to read, track, and record your stator test information. While performing tests, you can watch the testing throughout the process in real time. You can view various wave-forms for surge or magnetic field, which can be displayed real-time and printed if desired. The software logs all test results, so that you do not have to worry about losing important information. ESW designs the tooling to be simple to connect the part. We work closely with you to define and implement your customized testing needs. The videos and slideshow below show some of our Stator Testers.
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Bobbin Winding Coil Tester
SS108A series
Bobbin winding coil testers are used to test various coil of turns. Such as: generator winding turns, transformer winding turns, motor winding turns, inductor winding turns, contactor winding turns, relay winding turns, sparking winding turns, ignition winding turns, speaker voice coil, etc.
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Magnetizing Yokes, Magnetizing Coils
Recently in the motor industry, the decreasing the Cogging Torque, noise (vibration), and lost current, is required as the miniaturization, high-performance, and energy-saving abilities increase.
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Rogowski Coil
A Rogowski coil produces a voltage output based on the rate of change of the current input. The absence of magnetic core ensures low inductance and comes with no saturation, resulting with a fast response and no inserted losses.
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IGNITION COIL TESTER - ORANGE
MD76500M
*Non-intrusive, quick check tool instantly verifies active or inactive coil operation*Detects the magnetic field created by a coil energizing*Tool can be used to test coil on plug, coil near plug and coil pack systems
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Round Wire Coil Inductors
Round wire coil (RWC) inductors come in six platform sizes and enable the highest efficiency of any SMT inductor through the use of a low loss ferrite core material which minimizes AC losses and also eliminates thermal ageing. The use of round magnetic wire instead of rectangular flat coils enables a lower cost while still maintaining a low DCR and small footprint. The platforms have passed the AEC-Q200 stress test qualification proving the designs robustness and suitability to difficult environments but the parts are not IATF certified. The platform range from 7.6×7.4×6.4mm to 26x26x15mm and are suitable for a wide range of applications and markets including communications, computing and industrial.
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3 Phase Choke Coils
Supreme Instrument Laboratories
Suitable for operation on 415 / 440 V, A.C. 50 Hz. Working on air gap separation by increasing / decreasing the air gap with the help of a hand wheel mechanism, mounted on thick wooden / bakelite sheet with castor wheels for easy transportation.
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Inductor Coils
SemiGen's Inductor Coils are manufactured using our thin film process on quartz substrates. The precision photolithography and non-chemical etching process provides clean edges to assure uniformity from coil to coil. By using quartz and applying a polyimide coating we produce a device that eliminates the need for conformal coating or staking. Inductors can be epoxied down with nonconductive epoxy and the wire bonded for connection.
