Encoder is an electromechanical device used to give feedback to control systems regarding the object’s motion. So this feedback simply allows the control system to set up whether the object being checked is being properly positioned or moved or not and proper actions to be...
A permanent magnet synchronous motor (PMSM) - is a synchronous electric motor whose inductor consists of permanent magnets. The main difference between a permanent magnet synchronous motor (PMSM) and an induction motor is in the rotor. Studies show that the PMSM has...
An alternator is used to produce electrical current or power. Inside the alternator’s casing is the stator, a ring that is wound with copper wire. As the drive belt turns the alternator pulley, the rotor — a magnet that rotates within the stator — is rotated. This rotating magnetic field...
Explore the importance of motor balancing equipment, its role in detecting and correcting imbalances, types of balancing, and recent advancements. Understanding Motor Balancing Equipment: The importance of motor balancing equipment in industrial applications...
Maintenance professionals tasked with maintaining electric motor reliability are often concerned with testing their critical motors at voltages well above nameplate levels. It can certainly feel counterintuitive to test a 460V motor to 2,000V or a 4,160V motor to 9,320V. After all, the motor...
Wound-rotor synchronous motor is a synchronous electric motor, the rotor of which is made with a field winding. Construction of wound-rotor synchronous motor - Wound-rotor synchronous motor like any rotating electric motor, consists of a rotor and a stator. The stator is the fixed...
Most residential homes rely on an HVAC, whether it is for the furnace in the winter or the air conditioner in the hotter summer months. Of course, we always want to find any issues with this in the opposite season, but it doesn’t ever seem to work that way does it? An HVAC system...
Cooling Towers Have Been Used In Industry since the early 19th century. It is basically a heat rejection device or heat exchanger in which water and air are brought into contact with the purpose of lowering the temperature of the water. It’s not surprising that cooling tower technology...
Generally, an armature winding is like a conductor, and it covers with a single cotton cover, double cotton cover, otherwise cotton fiberglass and enamel. Usually, the rolls of the armature winding will bound mutually with the cotton tape. Thus the coils will be dipped in soaked...
In a synchronous generator, a DC current is applied to the rotor winding, which produces a rotor magnetic field. The rotor of the generator is then turned by a prime mover, producing a rotating magnetic field within the machine. This rotating magnetic field induces a three-phase set of...
Electrical maintenance personnel have for years been limited to troubleshooting with no more than a fluke and a Megger. This unfortunately does not provide enough information to allow most electricians to feel totally confident in determining if an electrical problem exists or not...
Preventive safety requires careful selection of equipment, particularly electric motors, in dangerous oil and gas recovery, chemical and petroleum refinery and mining environments. Motors can create an explosion by one of two means: A motor surface gets so hot during operation...
Electric motors - machines that transform electricity into mechanical energy - are ubiquitous in the engineering world. They are the cornerstone of engineering feats such as elevators, pumps, and even electric vehicles, thanks to the ability to leverage the electromagnetic induction...
The industry needs motors—lots of them—in all sizes and with wide-ranging features and capabilities. Depending on the application, these motors might be installed indoors or out, some in clean rooms and others in harsh industrial environments. Their power can range from less than...
There are various non-destructive testing (NDT) methods we can employ to evaluate the condition of different machine components, without the need to stop and disassemble the equipment. Vibration analysis is a prominent NDT tool used across many industries. In this article, we...
Almost every mechanical development that we see around us is accomplished by an electric motor. Electric machines are a method of converting energy. Motors take electrical energy and produce mechanical energy. Electric motors are utilized to power hundreds of devices we use...
You use electric motors for many of your appliances, and you see electric motors at work around you. After a few years of using your appliances and machines, however, you need to know how to be able to tell if you need to replace the electric motor of your appliance. Here are the signs...
According to the US Department of Energy, motor-driven equipment accounts for 64% of the electric consumption in the commercial and industrial sectors. This is understandable as most commercial and industrial operations are using a variety of motor-driven equipment, from conveyors...
For centuries, we’ve seen tremendous innovation in industrial operations. Our ancestors worked diligently to find solutions to the sluggish processes they experienced, which ultimately led us to the development of motors and automation. Today, countless companies rely...
There are certain considerations that you should keep in mind when you are operating a business. However, it is better to take more precautions when you are dealing with high voltage equipment. For ensuring that your business is running properly along with reducing...
Dynamic balancing is the practice of spinning an object at a high rate of speed and adjusting the balance or removing the vibration by subtracting or adding weight. This is the most common method of balancing a drive shaft, an engine crankshaft or an automobile tire...
Electricity does not exist naturally in any useful form. It has to be generated from any other sources of energy such as solar, wind, hydro, thermal, atom, etc. Photovoltaic cells help us trap energy from the sunlight and generators are used to convert mechanical power...
Every asset-intensive organization understands that the greater the uptime of machines, the more efficient and cost effective operations will be. Keeping your assets in optimal working order is easier and more cost efficient when advanced technology such as laser shaft alignment...
Motor rotor balancing can be a confusing topic leading to sometimes heated conversation, especially in motor shops where cultures have evolved so differently over the years. All rotors must be balanced, whether new from the factory OEM or recently repaired...
Proper motor shaft alignment increases the operating life span of rotating machinery. To achieve this goal, components that are the most likely to fail must be made to operate within their acceptable design limits. The Advanced Manufacturing Office of the U.S. Department of...
The following five factors can produce its own particular type of damage and leave its own special imprint on the bearing. Consequently, by examining a damaged bearing it is possible to determine the root cause of the damage so that the requisite actions can be...
A high voltage is used to verify that the clearances and solid insulation of components have adequate dielectric strength to resist expected overvoltage conditions. It also shows that the equipment is able to work safely over its complete lifetime. The objective sought during...
Proper motor shaft alignment increases the operating life span of rotating machinery. To achieve this goal, components that are the most likely to fail must be made to operate within their acceptable design limits...
Good motor repairs should maintain the efficiency level of the motor before its failure and last for a significant amount of time when placed back into operation. While this may seem obvious to many, the steps required in the repair process and the information needed...
In 1834, Thomas Davenport developed the first electric motor powerful enough to perform an actual task. However, there were earlier iterations developed by Michael Faraday and Joseph Henry, but their devices were not powerful enough to perform a task...
The ultimate goal in any piece of equipment is to have it operating free of any vibration while running smoothly for a long time. In reality, however, vibration is always going to be a part of any rotating machinery, and certain levels of vibration may even be acceptable...
An overheated electric motor will bring your equipment to a screeching halt. And while excessive heat may be the problem confronting you, knowing how and why your motor overheated is imperative. Until you get to the root of the problem, your motor will continue...
The use of electrical motors in vehicles is very common and useful. These small wonders are capable of converting electrical energy into mechanical energy to power windshield wipers, windows, antennas, seats and rear view mirrors...
Electric motors are one of the greatest innovations in history, and although motors may seem to be a modern invention, they’re not. William Sturgeon invented the first DC motor in 1832. You’d think most people who use electric motors would know how to maintain their motor...
Some people do not concern about the correct method to storage the electric motor. This matter look like simple and easy but if we not take serious action, it can cause serious damage and involve high cost for repairing when electric motor defect due to not proper...
It is essential to perform preventive maintenance (PM) checks on electric motors as a part of managing facility assets because they have a massive impact on a business' productivity and profit. Consider the five tips highlighted below...
Brushless DC motors are the technology of choice for applications operating at higher speeds. However, two different motor architectures can present a selection conundrum. The last decade has seen a growing acceptance of brushless DC motors as an alternative to brushed...
Electric motors are essentially the heartbeat behind many industrial companies. Whether you work in construction, manufacturing, or automotive, you’re going to work with electric motors frequently. Your daily operations are grounded in efficiency...
Almost any single device with an electrical and mechanical component can be referred to as electromechanical (EM). You might even call an electric motor an electromechanical device, because it turns electricity into rotary (mechanical) motion...
Predictive maintenance has become a worldwide accepted practice and is being implemented and finely tuned by nearly every industry category. Locating, defining, and acting on potential problems before they become catastrophic is the main objective of a predictive maintenance program...
DC motors were first developed in the early 19th century and continue to be used today. Ányos Jedlik is credited as being the first to experiment with DC motors in 1827. William Sturgeon (1832) and Thomas Davenport (1837) are credited with taking Jedlik's laboratory instrument and trying to commercialize it...
Machinery repairs can measurably improve machine uptime, if critical control points are observed to ensure proper shaft and housing repairs for machines with rolling element bearings. Starting with a typical industrial machine, the electric motor, the repair process will be examined, focusing on shaft and housing conformance.
Assess impact on production, reliability, suitability and cost. There are many software tools, spreadsheets and other freely available tools that one can use to make a sound judgment about the repair/replace decision for electric motors.