Electric motors are devices used to convert electrical energy into mechanical energy for various applications such as fans, blowers, compressors and other industrial equipment.
A typical motor consists of a rotor and stator. The former features a ferromagnetic core with projections that act like north or south poles when current passes through its wire windings, becoming north or south poles when current flows through it.
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If you are shopping for electric motors, it is vitally important to take several factors into account before making your purchase. Two obvious considerations are speed rating and power rating (measured in kilowatts and horsepower respectively).
Other considerations when purchasing an electric motor include its intended environment. This could include ambient temperature and altitude as determining factors; these could impact which lubricants, frame sizes, shaft configuration options and mounting options will be available to you.
Duty cycle should also be taken into consideration. Running your motor at full capacity continuously will significantly shorten its lifespan, while intermittent use and lower loads is perfectly fine. buy electric motor from surplusrecord industrial electrical motors are the best buy of electric motor used electric motor for sale at surplusrecord. surplus motor are the best Motors One key consideration when purchasing motors for industrial applications is whether to choose AC (Alternating Current) or DC (Direct Current). AC motors are popular as they are both affordable and versatile; DC motors tend to be more efficient with good starting torque but require higher electrical power consumption for operation.
What type of enclosure do you require? Does an open drip proof motor suffice, or would something more hazardous like a totally enclosed fan cooled (TEFC) motor be more suitable? Additionally, take note of mounting options and location for junction boxes.
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An electric motor converts electrical energy into mechanical motion through two primary elements - its frame and shaft. Its rotor produces torque by rotating its shaft in relation to a stationary core called a stator; within which is located sets of windings called auxiliary and main windings which induce hysteresis and eddy current to provide necessary operating mechanisms.
Dependent upon its application, used motors can be powered either with direct current (DC), such as from rectifiers or batteries, or with alternating current (AC), such as generators or the power grid. They may also feature brushes or brushless motors and single or three phase rotation with either axial or radial flux for cooling; air or liquid cooling can also be available as viable options.
When selecting an electric motor for any application, factors like size, frame type, power rating and speed range must be carefully considered. Common applications of motors include AC heating and cooling equipment for buildings or motor vehicles as well as commercial appliances as well as tools and pumps.
Single phase motors are one of the most frequently used electric motors, employing one alternating voltage to power their rotor. They're widely found in fans, home and industrial refrigeration equipment, household appliances, drills and garage door openers; with lifespans reaching up to 30,000 hours and at very reasonable costs; typically these motors should be regularly lubricated with oil to increase performance and extend their lifespan.
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Electric motors produce linear or rotary force (torque), designed to propel external mechanisms. Electric motors can be found driving equipment such as fans, blowers, pumps, machine tools, vehicles, industrial machinery cranes and generators. Their rotor comprises metal bars connected by three-phase electrical current from their power source that create magnetic fields around it that make the rotor turn and generate mechanical energy from within the motor itself. buy electric motor from surplusrecord industrial electrical motors are the best buy of electric motor used electric motor for sale at surplusrecord.
Rotor and stator components are housed within an enclosure for cooling and protection from foreign objects. This case typically contains a fan that draws air in from outside the motor, and an internal rotating shaft which pushes cooling air across both components to reduce friction between them. Furthermore, elevated mechanical fins often serve to dissipate heat generated by all these coils and parts within.
An electric motor's armature consists of coil wire windings on a laminated soft iron ferromagnetic core. When powered with AC current, these windings produce magnetic poles which pull on the core and cause rotation. A motor may also employ other configurations, including reluctance motoring or shaded-pole and nonsalient pole configurations; its air gap is also an essential aspect of its performance; larger gaps reduce efficiency while motors with smaller air gaps often operate at higher speeds and have greater rotation accuracy.
Industrial Electric Motors
Electric motors have many industrial uses, including fans, blowers, power tools, pumps, compressors, generators and conveyor systems. These motors may be powered by either single phase or three phase electrical systems - with most commercial and industrial applications opting for three-phase motors for better efficiency and performance.
Selecting an industrial electric motor depends on what work needs to be completed. Horsepower and RPM ratings must meet installation site needs; voltage requirements can differ with dual voltage displays being common. Frequency should also be taken into consideration, with 60Hz being standard across North America while 50Hz reigning supreme in Europe.
An electric motor converts electrical energy to mechanical energy through electromagnetic force that generates magnetic fields within its structure, causing its shaft to turn. Its rotating shaft is held within its frame by bearings and clutch, while its rotor features wire windings wrapped around a soft iron laminated ferromagnetic core which produces magnetic poles when charged by current.
These poles are strategically arranged to produce a Lorentz force which propels the rotor, and their width determines how much torque can be generated by a motor. Motors with larger gaps produce more torque, however this also increases friction and noise production from its motor.
