Used Motors

How Industrial Electric Motor Works?

Induction motor is the most common type of industrial motor used in the world. It is made of two main parts – a stator and a rotor. These parts are named on the basis of their rotation. For instance, the stator is the stationary part and the rotor is the rotating part. The stator features a three coil winding and a three-phase power input is given to it. The winding moves through the stator slots, which is made using thin and permeable steel laminations. When the electric current passes through the winding a rotating magnetic field is produced, which makes the rotor to turn. The magnet rotates at a certain speed, and this speed is known as the synchronous speed. According to the Faraday’s Law, an EMF is induced in the loop due to the varying magnetic field. This EMF produces current in the loop. The Lorentz Force Law states that electromagnetic force is produced in the loop, which makes it rotate. In short, electricity is induced in this rotor owing to electromagnetic induction rather than direct connection. The insulated iron core lamina is found inside the rotor, and it induces electromagnetic induction. Small iron cores are chosen for the purpose, because they help minimize the Eddy current losses. Unlike other motors, the induction motor has one major advantage – it is self-starting. They do not require permanent magnets, commutator rings, or brushes like other machine counterparts. The speed of induction motors can be easily controlled by managing the input power frequency. In these motors, the speed of RMF is proportional to the power applied, because the rotor tries to match up the RMF.  The speed of these motors is usually controlled using variable frequency drives.

How to Choose Between an AC Motor and a DC Motor?

A motor is termed as an AC motor or a DC motor based on the power source— the alternating current and direct current sources. Motor vehicles, batteries, and rectifiers are a few examples of DC sources. On the other hand, inverters, power grid, and electrical generators are a few examples of AC sources.

AC motors are mainly of two types – single-phase and three-phase electric motors. These motors are commonly used in various industrial applications owing to the advantages offered by them. The following are few of them:

• The motor possesses a simple design, and can be easily built.
• It requires low power for start-up, thus is more economical than its DC counterpart.
• It is sturdy and has a long lifespan among the two.
• An AC motor requires less maintenance than the DC motor.
• The speed of these motors remain constant, so they are particularly suited for applications where continuous movements and fewer gear changes are required. This type of motor is suited for conveyors, pumps, and fans.
• Often AC motors are integrated into variable speed systems where high accuracy is not required.
• If equipped with speed control functions, these motors may be expensive among the two.

A DC motor is designed for industrial environments and they offer several advantages. The following are a few of them:

• The motor is fast and ensures accuracy in terms of speed.
• The speed of the motor can be easily controlled by varying the voltage.
• They enable easy starting, acceleration, stopping, and reversing.
• They are easy to install in any application.
• These motors are suited for high power applications, too.

Owing to these advantages, these motors are widely used in dynamic applications demanding accuracy such as machine tools, elevators, robots, and so on. 

What Is Differences between Single-Phase and Three-Phase Electric Motors

Single-phase and three-phase electric motors have some fundamental differences in terms of their design, construction, and performance. Here are some of the key differences:

• Power Supply: The most significant difference between single-phase and three-phase electric motors is the power supply they require. Single-phase motors run on a single-phase AC power supply, while three-phase motors require a three-phase AC power supply.
• Starting Mechanism: Single-phase motors typically use a capacitor or start winding to provide the initial starting torque, while three-phase motors are self-starting and require no additional starting mechanism.
• Efficiency: Three-phase motors are generally more efficient than single-phase electric motors due to their design and construction. They have a more balanced load distribution, which results in smoother operation and less energy loss.
• Size: Three-phase motors are typically larger than single-phase motors of the same power rating. This is because three-phase motors require more windings and other components to handle the three-phase power supply.
• Power Rating: Three-phase electric motors can handle higher power ratings than single-phase motors. This is because three-phase power supplies can deliver more power than single-phase power supplies.
• Cost: Three-phase motors are generally more expensive than single-phase motors due to their larger size, more complex design, and higher power ratings.
• Applications: Single-phase motors are commonly used in residential and small commercial applications, such as fans, pumps, and compressors. Three-phase motors are commonly used in larger commercial and industrial applications, such as large HVAC systems, manufacturing equipment, and heavy machinery.

Applications of Used and Surplus Electric Motors

Industrial electric motors are designed to provide reliable and efficient power for a wide range of industrial applications. Here are some common applications of used electric motors:

• Pumps: Electric motors are used to power pumps for various applications, including water supply, wastewater treatment, oil and gas processing, and chemical processing.
• Compressors: Industrial electric motors are used to power compressors for air and gas compression applications, such as refrigeration, HVAC, and pneumatic tools.
• Fans: Electric motors are used to power fans for ventilation, cooling, and heating systems in industrial facilities.
• Conveyors: Electric motors are used to power conveyors for material handling applications in manufacturing, mining, and logistics.
• Mixers: Electric motors are used to power mixers for blending and mixing applications in chemical processing, food processing, and pharmaceutical manufacturing.
• Cranes: Industrial electric motors are used to power cranes for lifting and moving heavy loads in construction, manufacturing, and transportation.
• Machine Tools: Electric motors are used to power machine tools, such as lathes, mills, and grinders, in manufacturing and metalworking.
• Generators: Industrial electric motors are used to power generators for backup power and portable power applications in industrial settings.

Benefits of Choosing Used and Surplus Electric Motors

At JM Industrial, we take pride in our collection of unused and used electric motors for sale. These motors have been widely chosen for several distinct advantages that they offer. The following are a few advantages offered by them:

• Cost Reduction: We stock used and surplus industrial electric motors from industry leading brands. These motors are made available in lower prices than their original ones. This makes it possible for businesses to take advantage of these motors without spending a huge amount of them.
• Rebuilt Motors: Used motors doesn’t always mean ones with torn or worn parts. At JM Industrial we rebuild motors before offering them for sale. This makes it easier for users to achieve their industrial goals without overspending or worrying on the condition of these motors.
• Environmentally friendly: As known, the manufacturing of mechanical devices is energy-intensive. So, producing new ones requires lots of energy, which in a way increases your carbon footprint. By buying industrial electric motors for sale at JM Industrial, you are not only reducing your carbon footprint but also making an economically and environmentally wise decision.
• Faster Turnaround: Used or Surplus electric motor can be made available in the shortest turnaround times as compared to new ones.

Do you have used or surplus electrical motor in your facility that you no longer require? J&M Industrial is the platform that connects both buyers and sellers. If you own any kind of used Motors & Drives such as, used Gear Motors, used Gear Reducers, Power Pack Drives & Variable Speed Drives and more which you want to cash on or wish to sell, we can help you in both scenarios. Send us an inquiry containing the specifications and condition of the electrical motor.