L&S Electric is pleased to offer the broadest range of Industrial AC and DC Electric Motors to our customers.
We feature a selection of industrial AC and DC electric motors for your particular needs. With this type of machine, electrical energy is converted into mechanical energy.
Our knowledgeable staff specializes in the careful motor identification and analysis and can recommend motors for new applications and replacement electric motors based on horsepower, rotating speed, frame size, enclosure type, required operating voltages, and duty cycles.
Various Types of Electric Motors
There is an electromagnetic disc-brake built in an AC brake motor. This design stops the motor, and other connected equipment, in case there is an interruption of incoming current.
Definite Purpose Motor
A definite purpose motor is any motor designed with special mechanical features for use in specific applications. Some of the many designs are motors designed for car washes, pumps, kilns, cooling towers, automotive, multi-speed applications and much more.
Farm Duty Motors
Farm duty motors are designed for applications that need high starting torque and a moderate starting current.
Inverter Duty Motors
Working with VFDs, inverter duty motors are designed to withstand the higher voltage spikes the drives create. However, the ability to withstand those spikes mean inverter duty motors are more expensive than general purpose motors.
Medium Voltage Motors
Several of our manufacturers stock medium voltage motors and most of them offer medium voltage motors through production.
The term explosion-proof refers to motors that approved for use in Class 1 locations. These sites have with potential explosive or ignitable vapors and gasses present throughout the place. These places are inevitable parts of the manufacturing process. If the material considered as hazardous only wreaks havoc because of a ruptured container or similar situations, then this is classified as a Division II location.
Each motor regarded as safe for hazardous locations comes with a label. This label indicates whether it is appropriate for use in Class I or a Class II location. There are also motors that approved for both location types. The Class just determines the qualities of the hazardous components that are present in the area with a motor.
Mill Duty Motors
Mill duty motors are compatible with the newest designed thyristor converters. The stator design allows for rapid current change to meet higher dynamic response and repetitive overload applications found in steel mills.
Permanent Magnet Motors
Permanent magnet motors are much more efficient, lighter, and compact than comparable sized wound AC motors because the permanent magnets replace the field windings.
Premium Efficiency Motors
NEMA premium efficiency motors are designed to generate energy using cleaner and less wasteful methods. Because they are built to high specifications, they are likely to need less repair and maintenance during their operating lives.
Severe Duty Motors
Severe duty motors are considered an improvement over TEFC motors. They are designed to operate in industrial environments because they are tougher and better suited.
Single Phase Motors
Single phase motors are designed for smaller equipment and machines that require a lower horsepower. These motors are less expensive to manufacture, require little maintenance and are easy to repair.
Stainless Steel Motors
Stainless steel motors stand up to wet or corrosive environments better than any other kind of motor. That makes them the best choice for food processing, pharmaceutical, and other environments demanding extreme cleanliness while experiencing frequent wash downs.
Vertical AC Motors
Vertical AC motors work well with centrifugal pumps, sump pumps, turbine pumps, fans, aerators, cooling towers and more. These motors are available in many types of enclosures and thrust valves specified for your application.
If you have a facility where you need to expose a motor to certain chemicals, washdown procedures, humidity, and moisture, then a washdown motor is what you need.
Open Drip Proof versus Fan Cooled, Open Drip Proof
An open drip proof motor usually does not overheat because it runs cooler. A fan cooled open drip motor needs an external fan to blow air over the motor to cool it down.
6 Things to Know About Electric Motors
When electric motors are well cared for, not only will they last for years, they provide you with ongoing reliable service. It really doesn’t matter where the motor is used in your place of business; it is important to ensure that it is cared for properly.
Electric motors will last for years and give you regular steady service, providing they are well cared for. It does not matter where they are used; proper care is important.
Here are six things to know about electric motors.
Do: if you need to store your motors for a long time, keep them away from any source of vibration if possible. Try to keep the storage dry and clean and keep an eye on the relative humidity. The moisture in the air will affect the motor.
Don’t: don’t just start the motor up after it has been stored for a long time. Check to see if moisture damaged anything. Also, look at the insulation resistance and check the windings against
Do: perform routine maintenance. Regular maintenance is crucial to extend the life of your motor. Look into starting a predictive and preventative maintenance program.
Do: check shaft alignment every 2,000 hours the motor has been running. As part of a routine maintenance program, inspect the bearings, belts, rotor/stator, and lubrication. Follow the lubrication guidelines provided by the motor manufacturer. Also, inspect brushes, the motor mounts, and have a vibration test performed at least on an annual basis.
Don’t: do not over-lubricate the bearings! Try to prevent the buildup of dust in the cooling passages.
Do: consider the following during the normal operation of your motors:
- Make sure the minimum loads are normal, so there is rotation of the shaft
- Consider adding a VFD or soft starter to improve energy efficiency, cut expenses, and save wear and tear on the motor.
- Should the motor fail, look at repairing or replacing it. New motors meet the new efficiency standards determined by the US Department of Energy.
Don’t: do not use an oversized motor, which may use more energy and still not perform very well. Always use an electric motor that is sized properly and fits your specific needs.
Do: keep an ear out for any strange or new noises. If you hear something that you have not before, it may be a sign that the shaft or bearings are damaged.
This is not a complete list, but it does cover some key information to keep your electric motor running properly.
If you have any questions or need some advice, let us know, and we will help.
- A.O. Smith/Century Electric
- General Electric
- Lafert North America
- Leroy Somer
- Marathon Electric
- Nidec/US Motors
- North American Electric
- Worldwide Electric