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US8698367B2 - High-speed permanent magnet motor and ...

Permanent magnet (PM) motors and/or generators can be used in many applications that can require high power density and/or high efficiency. Because the size of an electrical machine typically scales with its torque capability, at a given power level, the size of the machine can often be reduced by increasing its rotational speed.

Electropermanent magnet - Wikipedia

An electropermanent magnet or EPM is a type of permanent magnet in which the external magnetic field can be switched on or off by a pulse of electric current in a wire winding around part of the magnet. The magnet consists of two sections, one of "hard" (high coercivity) magnetic material and one of "soft" (low coercivity) material.The direction of magnetization in the latter piece can be ...

Electromagnets Supplier - Magnets By HSMAG

Electric Permanent Magnetic Chuck, Electric Magnetic Chuck for CNC milling machine, High precision milling permanent magnet electric chuck, High Standard Electrical Permanent Surface Grinder Magnetic Chuck, milling magnet clamp chuck chinese manufacturer Electric Permanent Magnetic Chuck Serial:HSDYC DYC Electric Magnetic Chuck the main uses ...

Buy low rpm permanent magnet generator and get free ...

If you're still in two minds about low rpm permanent magnet generator and are thinking about choosing a similar product, AliExpress is a great place to compare prices and sellers. We'll help you to work out whether it's worth paying extra for a high-end version or whether you're getting just as good a deal by getting the cheaper item.

What temperatures can magnets withstand? - supermagnete.de

the magnet's shape; the positioning of magnets in a group; ... the structure of permanent magnets starts to change. Remagnetising is no longer possible. ... do not use them in places with extremely high or low temperatures. Does immersion in liquid nitrogen damage magnets? Immersion in liquid nitrogen at a temperature of -196°C (77 K) does not ...

Linear iron-core permanent magnet motor with high force ...

Linear iron-core permanent magnet motor with high force and low acoustic noise. ... and to demonstrate the new motor's desired performance of high force and low noise. We hypothesize and experimentally validate that the acoustic noise and associated vibration of linear iron-core permanent magnet motors are caused by high frequency force ...

Coercivity - Wikipedia

Coercivity is usually measured in oersted or ampere/meter units and is denoted H C. It can be measured using a B-H analyzer or magnetometer. Ferromagnetic materials with high coercivity are called magnetically hard materials, and are used to make permanent magnets. Materials with low coercivity are said to be magnetically soft.

Permanent magnet generators - The Switch

High-speed permanent magnet generators PMG 550-5850 KW, 1000-1500 RPM. The Switch high-speed PMGs operate with a three-stage gearbox and feature a speed range between 1000 rpm and 2000 rpm. They offer an extremely small generator size and very high efficiency. As a stand-alone component, these PMGs can be used with many different turbine designs.

Steel with good magnetic properties - practicalmachinist.com

Mar 17, 2007· theres steel with high magnetic permiability and low permiability, the high silicons dont make good permanent magnets, although the magnetic feild induced by a current is high, soon as the current is removed the feild collapses,generally as quickly as poss, carbon slows the collapse so the aim would be 0.015%Cmax Si 1.3-1.6 for a transformer ...

12/24V 30W High Speed CW/CCW Permanent Magnet DC Motor …

BBT 12V 30W High Speed Permanent Micro DC Magnet Motor,30dB Low Noise Reversible Electric Gear Motor for DIY Generator (DC 12V 3000RPM) $22.99 WMYCONGCONG DC 12/24V 30W High Speed CW/CCW Permanent Magnet DC Motor (12V DC 3500RPM) and 37mm Dia DC Geared Motor Mounting Bracket Holder w/ 6mm Hex Coupling

Coercivity and Remanence in Permanent Magnets

Coercivity and Remanence in Permanent Magnets. A good permanent magnet should produce a high magnetic field with a low mass, and should be stable against the influences which would demagnetize it. The desirable properties of such magnets are typically stated in terms of the remanence and coercivity of the magnet materials.

Permanent Magnets Materials and Magnet Systems

permanent magnet, as just a few impacts with a hammer diminish its magnetisation considerably. From the magnetic steels of the thirties used in car ignition sys-tems to the new high-energy magnets made from rare-earth metals – the world has witnessed tremendous ad-vances in technology. Most of today's permanent magnets and their application in

Windstream ® Permanent Magnet DC Generators

For wind and microhydro turbines. Windstream ® offers a selection of 4 Low RPM Permanent Magnet DC Generators plus one High RPM model. Performance curves and specifications are available on each generators by clicking on the individual generators to your right.

Product Matrix - DC Generators, PM Generators

High Speed Permanent Magnet Generators (Above 700 RPM) We manufacture high speed alternators from 1 KW to 100 KW in speed variations between 700 rpm and 4500 rpm. Low RPM Permanent Magnet Generators Below is the product matrix for the company's commonly sold low rpm. 1kw 270 Series 100 RPM 125 RPM 150 RPM 250 […]

High Speed Motors, Electric Generators, Permanent Magnet ...

The high-speed permanent magnet industrial machines are generally used in demanding applications such as turbomachinery, oil & gas and military etc. Calnetix's high-speed motors and generators combined with the active magnetic bearings is a 360-degree solution and an ideal match for energy efficiency and compactness. Our permanent magnet ...

DESIGN AND DEVELOPMENT OF A TWO-MEGAWATT, HIGH …

DESIGN AND DEVELOPMENT OF A TWO-MEGAWATT, HIGH SPEED PERMANENT MAGNET ALTERNATOR FOR SHIPBOARD APPLICATION Co Huynh, Larry Hawkins, Ali Farahani, and Patrick McMullen Calnetix Inc. Cerritos, CA 90703 Abstract – Conventional gas turbine generator sets consist of a high speed turbine coupled to a low speed alternator through a speed reduction

low rpm high torque motor permanent magnet - alibaba.com

Alibaba.com offers 6,257 low rpm high torque motor permanent magnet products. About 1% of these are ac motor, 1% are magnetic materials. A wide variety of low rpm high torque motor permanent magnet options are available to you, such as free samples, paid samples.

What's the Difference Between AC Induction, Permanent ...

The magnets in permanent-magnet motors. ... These Hall sensors output low and high signals when the rotor's south and north magnet poles pass — to allow the following of energizing sequence ...

Magnetic Separators - 911Metallurgist

Permanent Magnetic Separators The science of magnetic separation has experienced extraordinary technological advancements over the past decade. As a consequence, new applications and design concepts in magnetic separation have evolved. This has resulted in a wide variety of highly effective and efficient magnetic separator designs. In the past, a process engineer faced with a magnetic ...

ABB low voltage permanent magnet motors Highest …

ABB low voltage permanent magnet motors Highest efficiency for low speed and high torque applications Developed from synchronous motors, ABB's low voltage permanent magnet motors combine the high speed accuracy of synchronous technology with the robust design of induction motors. They have the capability to deliver very high torque from small ...

High-efficiency and low-cost permanent magnet guideway ...

High-efficiency and low-cost permanent magnet guideway consideration for high-T c superconducting Maglev vehicle practical application. Z Deng, J Wang 1, J Zheng, H Jing, Y Lu, G Ma, L Liu, W Liu, Y Zhang and S Wang. Published 1 October 2008 • IOP Publishing Ltd Superconductor Science and Technology, Volume 21, Number 11

High corrosion resistance and low weight loss products ...

High corrosion resistance and low weight loss products Build Your Custom Magnet As poor corrosion resistance of Iron-base and Nd-rich grain boundary, NdFeB magnets can't be used until plated.

Temperature and Neodymium Magnets - kjmagnetics.com

Permanent losses: Above temperatures where the magnet material was originally sintered, structural changes will occur to permanently demagnetize a magnet. No amount of externally applied magnetic field will bring the magnet's strength back. For neodymium magnets, this temperature is very high, typically above 900°C to 1000°C.

Permanent magnet motors - Process performance motors (IEC ...

The permanent magnet motor range extends the effective nominal speed range of the rugged industry workhorses down to 100 – 850 r/min. The motors can simplify drive systems by effectively eliminating the need of speed reduction devices.

Glossary of Magnet Terms | Dura Magnetics USA

Magnetic circuit, an assembly consisting of some or all of the following: permanent magnets, ferromagnetic conduction elements, air gaps, and electrical currents. Magnetic Length, The physical length of the magnet dimension which corresponds to the direction the magnet is magnetized. This may or may not be the magnet's orientation direction.

Development and optimization of low-speed and high ...

Fig. 1 shows the basic configuration of low-speed and high-efficiency permanent magnet power generating system, which consists of a hydro kinetic energy turbine, three-phase low-speed and high-efficiency direct-drive permanent magnet generator (LHPM generator), rectifier and load. The power generating system is direct-drive and portable without any gearbox.

DIY High output Permanent magnet Alternator / Generator ...

Jul 15, 2014· High power high tech skewed stator design from Hurricane Wind Power White Lightning PMG Wind Turbine Permanent Magnet Alternator / Generator https://hurricanewindpower.com

: permanent magnet generator

Akozon Permanent Magnet DC Motor 12/24V 30W CW/CCW for DIY Generator High Speed Low Noise for Cotton Candy Machine, Small Cutting Bench,Grinding Machine,Medical Equipment etc(12v 3000rpm)

High torque motor low speed | Alxion | Torque motors ...

A torque motor is an electrical motor that is used for applications at low rotary speed quite often in direct drive without gear.. Moreover, the torque motors are very often used in cyclic machines with acceleration, constant speed, deceleration and return and also in applications of machines with constant operation delivering a power at constant speed.

Permanent Magnets - hyperphysics.phy-astr.gsu.edu

Coercivity and Remanence in Permanent Magnets A good permanent magnet should produce a high magnetic field with a low mass, and should be stable against the influences which would demagnetize it. The desirable properties of such magnets are typically stated in terms of the remanence and coercivity of the magnet materials.