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Industrial aC motors

Industrial aC motors

Offering fast, often same-day, shipping from six regional US warehouses, WorldWide Electric takes pride in providing a competitive edge to our customers by responding to their requirements with urgency, technical expertise, and professionalism. WorldWide Electric Corporation manufactures and distributes high quality, affordable industrial electric motors. Our flagship line of WorldWide motors includes a diverse range of motors to fit nearly every low-voltage industrial application, such as Farm Duty, Premium Efficient, Stainless Steel, Pump, and more. Our gear reducer lines include Shaft Mount, Stainless Steel Washdown, Right Angle Worm in both aluminum and cast iron, Helical, and Helical Bevel, and are ideal for most industrial speed reduction applications. From Premium Efficiency motors to world-class Variable Frequency Drives and the accessories to match, we have you covered. And that means protecting your profits.

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Motors & Power Transmission

VIDEO ON THE TOPIC: Testing Big AC Motor at Work

Electric motors are a primary means for furnishing motion on modern industrial machinery and equipment, but designers cannot bolt on the cheapest version that fits. Implemented properly, electric motors are a cost-effective and reliable method to create rotational motion, and they also can couple with gearboxes and other mechanisms to achieve varying levels and types of force.

Motors that are not properly sized will be inefficient and can cause operational and maintenance problems. Designers are, at times, overwhelmed by the wide variety of motor manufacturers, styles and sizes available. Typical motors may be ac or dc, for fixed or variable speed, with steppers and servos as options for high-precision applications. Each style has certain strengths, but all applications must be sized to operate the load under all normal conditions.

The focus of this article is on basic ac motors see Figure 1. Figure 1: Most industrial machinery or equipment incorporates multiple ac motors. Courtesy: AutomationDirect.

Knowing how to select the right size motor for a given application requires a methodical look at the requirements. For any machine builder or OEM, cost is always a key consideration. Beyond that, an evaluation of the environmental conditions, operational requirements and available power will lead users down the right path.

This article reviews the basic considerations and steps for properly selecting and sizing electric motors. Getting the motor size right is critical for any application.

Properly sized motors operate the driven equipment most efficiently, which in turn causes the least wear and tear. When equipment is running correctly, machine uptime is maximized, and so is the return on investment in the motor and the driven equipment.

Energy efficiency is another big factor. Beginning in the s, regulations have progressively required more motor types of 1. Refined designs and construction methods using more copper allow these premium-efficiency motors to draw less current in operation.

Initial costs are usually higher, typically more than offset by lower operating costs over the life of the motor. Heat and installation issues are two main reasons for motor failure, so both conditions must be considered. Heat can originate from several sources and is most damaging to motor insulation systems. It can arise from outdoor installations, or it can be transmitted from associated process equipment.

Electric motors generate their own heat within the windings during operation, and mechanical friction at motor bearings is another source. Installation issues such as misalignment, improper cooling, incorrect motor type for the environment and vibration must be corrected. Properly sized motors will not experience problematic heat due to overloading, and excess heat can be mitigated by ensuring proper cooling with adequate available airflow.

Improper installation resulting in misalignment and or excess vibration will mechanically damage the motor, bearings and associated equipment over time. Motors must be correctly installed and sufficiently sized for the applied loading to minimize and to mitigate vibration issues and ensure long bearing life. Proper selection of motor mounting brackets can simplify installation and assist in accomplishing correct alignment.

Motor sizing steps should generally be performed in this order, but each factor relates to and affects the others. Properly accounting for these considerations and selecting a motor based on them results in selecting a motor that can carry out the work needed without having a shortened life due to premature winding, insulation or bearing damage. Not every motor load is the same, however.

Figure 2: Material handling conveyors are a common constant-torque application well-suited to ac motors. Constant torque loads are the most straightforward applications. These are loads where the required torque does not vary much with the speed. This is common for conveyors, compressors and cranes see Figure 2. The horsepower requirement does vary with speed or how much work is effectively being performed.

For these constant torque applications, it is necessary to determine the load experienced by the motor in order to select the proper horsepower. This may be indicated on the nameplate of the driven machine, or from torque testing to determine the amount of required force. The minimum required horsepower is calculated using the formula:.

Variable torque loads, where the required torque changes with speed, are more characteristic of equipment like pumps and fans. These loads should be sized to the highest or peak loading. For any motor load, one must account for the fixed operational speed or the variable speed range at which the motor will run when connected to the equipment.

Variable frequency drives for adjusting motor speed are a good option, especially since many loads will experience large decreases in energy usage if the motor can be run at a slower speed. For variable speed applications, the turndown ratio of the motor and equipment must be evaluated. This ratio is the maximum or nominal motor full speed divided by the lowest operating speed.

A motor may lose the capability to cool itself if turned down too far. For motors that will use a variable frequency drive, ensure that the motor selected is a 3-phase inverter-duty-rated motor. Duty cycle of the load defines how much time the motor must run and stop. Frequent starts are harder on a motor because they generate more heat. Environmental considerations include the maximum and minimum ambient temperatures, normal and washdown moisture and contaminants such as dust and dirt.

These will drive selection of the motor construction type. There are many configurations to meet various environments, and three popular styles for industrial applications are:. Best practice is to choose the motor able to withstand the operating environment with the best cooling performance. This will increase uptime, extend operational life and reduce required maintenance. The available power supply and preferred motor controls also play a role in sizing the motors for an application.

For ac motors, users will need to select a single-phase or a 3-phase motor based on what is available at the facility.

Generally speaking, 3-phase power is better suited for machine and process applications. Also, the higher the operating voltage, the lower the electrical current needed for the same load, and lower current uses thinner conductors and generates less heat. Selecting the operating voltage often comes down to using what is commonly available at a given location.

But where there is a choice, a higher operating voltage improves motor longevity. This is particularly important in smaller motors where the mass, fan construction and insulation systems may not adequately offload heat. A 3-phase motor is more easily reversed than a single-phase motor and is thus preferred for applications requiring forward and reverse operation.

Following the steps presented in this article will ensure a motor will be sized for all load conditions, able to survive the environment and functionally match the available power. There are often multiple sizing and other options for a motor application, and a successful design will strike the best balance among these options while minimizing initial and operational costs. Motors, Drives Three steps to size motors Proper motor sizing precludes equipment failures, ensures efficiency and reduces maintenance issues.

By Bryan Sisler August 6, Related Articles Cultivating robotics and AI for sustainable agriculture Real-time monitoring and control for a water, wastewater operation How clear were automation predictions?

Bryan Sisler. He has been involved in the automation industry for the last 27 years, most of them specializing in drives, motors and communications technologies at a variety of large industrial manufacturers and distributors.

Electric motors are a primary means for furnishing motion on modern industrial machinery and equipment, but designers cannot bolt on the cheapest version that fits. Implemented properly, electric motors are a cost-effective and reliable method to create rotational motion, and they also can couple with gearboxes and other mechanisms to achieve varying levels and types of force. Motors that are not properly sized will be inefficient and can cause operational and maintenance problems.

EBI is the authorized electric motor distributor of many brands of motors. Our inside sales team and representatives will help you choose the electric motor that matches your need and application. Our specialist will help you maximise the performance of your application with the right electrical motor. At EBI, our first corporate branch of specialized in Electric Motor Repair and electric motor distribution and retail. Today our electric motor repair shop has grown with Dynamic Balancing services. In the field of electric motors, there are many different types of electric motors for many sorts of applications.

AC and DC Motors

There seems to be a problem serving the request at this time. General purpose motors can be used for a wide range of purposes. Whether you need to power a compressor, agricultural equipment, or industrial tools, an all-purpose motor will suit your needs. You can find a variety of quality products and brands on eBay. Industrial motors are often referred to as electromechanical models. This means that they use electricity to create mechanical energy. New and used industrial electric motors can be single- or three-phase models.

IE3 Electric Motors

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The standard definition for an AC Motor is an electric motor that is driven by alternating current. The AC Motor is used in the conversion of electrical energy into mechanical energy. This mechanical energy is made from utilizing the force that is exerted by the rotating magnetic fields produced by the alternating current that flows through its coils. The AC Motor is made up of two major components: the stationary stator that is on the outside and has coils supplied with AC current, and the inside rotor that is attached to the output shaft. The fundamental operation of an AC Motor relies on the principles of magnetism. The simple AC Motor contains a coil of wire and two fixed magnets surrounding a shaft. When an electric AC charge is applied to the coil of wire, it becomes an electromagnet, generating a magnetic field. Simply described, when the magnets interact, the shaft and the coil of wires begin to rotate, operating the motor. AC Motor products have two options for feedback controls. While both the AC Motor resolver and AC Motor encoder offer the same solution in multiple applications, they are greatly different.

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Many suppliers offer a range of products that fall into both segments. Motors above the cut-off power rating are not subject to the MEPS. The classification of low voltage AC motors and DC motors by power in this study considers the following power ranges shown in the table on the left.

That's what Mini Motor has been doing for some time and plans to continue doing on the market of motors made of stainless steel, Torque : 0.

Free shipping over Farm Duty Motors. Explosion Proof Motors. Pump Motors. Compressor Duty Motors. IEC Metric Motors. Premium Efficiency Motors. DC Motors.

Yaskawa offers a line of AC motors that are optimized for use with our AC Drives in a variety of applications.

WorldWide Electric Corporation

Hoyer IE3 electric motors are manufactured according to the efficiency class system specified under IEC They have a proven high quality, reliability and performance. The motors are asynchronous low voltage three-phase TEFC squirrel-cage motors. Motors in size have closed bearings greased for life. All IE3 motors are provided with blind caps in all supply connections and are as standard IP55, prepared for drain holes and painted RAL low gloss. The electric motors are used for a wide variety of industrial, marine and wind applications. Typical applications are:. If you have any questions please get in contact with us. At Hoyer we work to increase your performance. The scale of documentation required varies from industry to industry.

Different types of motors and their use

AC motors are highly flexible in many features including speed control VSD - Variable Speed Drives and have a much larger installed base compared to DC motors, some of the key advantages are:. The current trend for VSD is to add more features and programmable logic control PLC functionality, which are advantages for the experienced used, but require greater technical expertise during maintenance. In this type of motor, the rotation of the rotor is synchronized with the frequency of the supply current and the speed remains constant under varying loads, so is ideal for driving equipment at a constant speed and are used in high precision positioning devices like robots, instrumentation, machines and process control. Click here for an example Synchronous Motor from RS. This type of motor uses electromagnetic induction from the magnetic field of the stator winding to produce an electric current in the rotor and hence Torque. These are the most common type of AC motor and important in industry due to their load capacity with Single-Phase induction motors being used mainly for smaller loads, like used in house hold appliances whereas Three-Phase induction motors are used more in industrial applications including like compressors, pumps, conveyor systems and lifting gear.

Industrial electric motors and drives

An AC motor is an electric motor driven by an alternating current AC. The AC motor commonly consists of two basic parts, an outside stator having coils supplied with alternating current to produce a rotating magnetic field , and an inside rotor attached to the output shaft producing a second rotating magnetic field. The rotor magnetic field may be produced by permanent magnets, reluctance saliency, or DC or AC electrical windings.

Industrial AC and DC Motors

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