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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 / 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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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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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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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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Fluxmeter
Measures changes in magnetic flux, as detected through a Helmholtz or similar coil arrangement.
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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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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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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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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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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 and Search Coils
Standard field Helmholtz coils, magnet moment measurement Helmholtz coils, and search coils.
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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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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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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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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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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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Moment Measuring Coils (Helmholtz)
measurement of the magnetic moment of magnetized parts and for generation of homogeneous magnet fields with easy access. Inner diameters from 20 - 1040 mm. X-Y and X-Y-Z coils are also available. Typical serial coils are the following types: MS 20, MS 75, MS 150, MS 210, MS 440.
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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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terraTEM Receiver Coils
TRC
The terraTEM multi-turn receiver coils (TRC) are designed to be used in place of largTRC ver sideviewXe receiver loops, placed either inside or outside the transmitter loop with the measurement point being at the location of the TRC. The compact size of the TRC receiver, measuring just 0.6m x 0.6m x 0.33m, makes the multi-turn coils convenient to use, and is available in either single component or three component form with the latter requiring the multi-channel receiver option to be fitted to the terraTEM.
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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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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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Single Variable Choke Coils
Supreme Instrument Laboratories
Suitable for operation on 220 / 240 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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Bobbin Winding Coil Turn Tester
SS108 Series
This (SS108** series) winding coil turn testers are used for testing turn of various coils without core, like as: generator winding, transformer winding, relay, inductor, contactor, ignition coil, voice coil, etc.
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Toroid Core Coil Turns Testers
SS107A
The magnetic torrid ring core winding coil turns tester (SS107A) adopts the high speed center microprocessing unit circuits and precise measurement A/D circuits. This coil turns tester is used to count the coil turns of various torrid core winding coils. Like as: torrid core inductors, torrid core transformers, torrid core sensors, wate meter sensors, torrid current transformers, torrid core choke coils, etc. The tone tester is named magnetic ring core coil turn tester also.
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Coil Testers & Power Supplies
POB Series
Coil testers and power supply units, models POB30 and POB40 are ideal for commissioning and maintenance testing of circuit breakers. The station supply is not available. The POB series are power supply units implementing the latest power electronics technology. They are developed for use in switchyards, power and industrial environment. In addition to providing current and voltage for breaker testing, they can measure certain coil parameters.
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Flux Meter and Measuring Coils
MAGNET-PHYSIK Dr. Steingroever GmbH
The measurement of magnetic quantities can almost always be traced back to the measurement of a magnetic flux. The electronic fluxmeter is therefore the most versatile measuring instrument in magnet technology as a measuring instrument for magnetic flux. The fluxmeter is operated together with a measuring coil.
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Search Coils And Field Measuring Coils
Designed to measure the magnetic flux on magnets or in the airgap of magnet systems.
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Automotive Ignition Coil Pulser and Tester
Zapper
Automotive Diagnostics and Publishing
The Zapper Automotive Ignition Coil Pulser and Tester is meant to allow you to activate and pulse all kinds of ignition coils on a bench. Test all available coils found on the market today. The Zapper coil testing bed and pulser allows testing of COP or Coil On Plug, DIS, Distributor Coils, Coil Packs and any other coil system. It also allows testing of COP coils with internal driver within the coil. The Zapper is a unique tool and all you'll ever need to test and diagnose ignition and misfire problems.
