Eddy current dynamometers determine the torque of an engine by creating eddy currents. They are used extensively in the automotive industry to produce braking torque. Also known as eddy current dynos, these devices offer the advantages of low maintenance, high levels of control and simple construction.
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SAKOR Technologies, Inc.Okemos, MI 517-332-7256 SAKOR Technologies stands behind its eddy current dynamometers. SAKOR's underlying philosophy is based on establishing a collaborative relationship with its customers, which greatly minimizes the possibility of costly scope and engineering changes during the design process. It comes down to trust. SAKOR asks questions so it can find out what it is that you really need. Call today.
Wineman Technology, Inc.Saginaw, MI 989-771-3000 Unlike other companies where test plays a partial role, Wineman Technology's singular focus is the design and development of test equipment for advanced research and development, functional test labs and manufacturing production. For precision manufactured eddy current dynamometers with maximum system reliability, serviceability and support, turn to Wineman Technology today.
Land & Sea, Inc.Concord, NH 866-396-6648 Are you in the market for quality, cost-effective eddy current dynamometers you can really trust in? If so, then the experienced professionals at Land & Sea, Inc. can deliver you the sort of superior results unparalleled in the industry. From automotive and industrial to laboratory and marine, Land & Sea services a wide range of applications and industries. Please contact Land & Sea, Inc. today.
Power Test, Inc.Sussex, WI 262-252-4301 In addition to excellent eddy current dynamometers, Power Test, Inc. is able to rapidly prototype new products and create customized solutions for individual needs. Power Test's extensive knowledge and experience allows it to address the needs of any customer and enables it to control manufacturing costs, assure on-time deliveries and be directly responsible for a high level of quality.
Locher, Inc.Lancaster, OH 800-956-2437 Locher, Inc. can assure you that its team of talented experts can deliver you the quality eddy current dynamometers you're looking for - on time and at an affordable price. Additionally, any spindles entrusted to Locher are repaired by highly trained spindle experts who utilize the latest in equipment and technology, readily able to analyze and repair your spindles with a quick turnaround.
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Eddy current dynamometers are a subset of chassis dynamometers and are the most common absorbers, made to fit in most chassis dyno pits. They can also act as brake dynamometers. Unlike inertia dynos, they are able to provide a quick load change rate as well as steady state and controlled acceleration. Many new eddy current dynamometers use cast iron discs to pass through the magnetic field and form eddy currents. Additional materials include copper, aluminum and other conductive metals. Variable electromagnets change the strength of the magnetic field in order to control the amount of braking. The electromagnetic voltage is computer controlled to match the changes in the magnetic field to the applied power output. The range of speed and torque that eddy current dynamometers provide makes these dynos very versatile and ideal for engine testing. They are also useful and effective when testing transmissions, turbines, electric motors, gears, pump and other machines. Dynamometers are used primarily for these purposes and are widespread in manufacturing, production and industrial applications.
Eddy currents are created when a conductor (such as a metal disk) is introduced to a changing magnetic field. A circulating flow of electrons creates its own current within the magnetic field. These currents move in opposing directions from the movement of the disk, creating a repelling or dragging force between the conductor and the magnet. The strength of the currents and therefore the strength of the repelling action increases when the power of the magnetic field is increased, the electrical conductivity of the disk is greater or when the magnetic field changes quickly. The torque of the vehicle is determined through the voltage that was required to create eddy currents that were strong enough to match the output of the vehicle. A certain level of voltage indicates a specific amount of torque. Because eddy currents generate heat, eddy current dynos must be cooled. Most are air cooled but some require external water cooling systems. In other systems, the heat from the currents is used for induction heating. These dynamometers are a heavy duty but cost effective way to produce braking torque. They are also used as load absorbers because they can provide a slight levitation effect or an air cushion to absorb an impact. Because eddy current dynamometers are chassis dynos, they are able to measure torque while the engine is still in the vehicle.
