Archive for the ‘Energy Efficiency – motors’ Category

Causes of faults in electric motors and their effects

October 21st, 2016 | 5 Comments | Posted in Energy Efficiency - motors
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Toay, A.N. tells us about AC motors/electric motors and the causes of faults. If like him you want to discuss a topic that you like, send us a mail and we will publish it after a short review!

Failure in electric motors may occur at start-up or during operation. Most of the electric motor failures occur at start up due factors such as low insulation resistance, over-current or mechanical failures. Other causes include issues with the supply, operation environment or lack of maintenance.

Most of the motors, regardless of type and rating have a long service life and only require a minimum maintenance to ensure they do not malfunction. It is recommended to regularly maintain the motors and associated equipment, and to check for signs of aging of the insulation or other parts that may degrade the motor.

Main parts of an electric motor

Main parts of an electric motor | image: je-bearing.com


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Industrial application of Synchronous motors

July 14th, 2016 | 2 Comments | Posted in Energy Efficiency - motors
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D.Ros is so crazy about motors that everytime we receive an article from him, we know what it’ll be about. Despite of this, his material is always very interesting and well explained.

For our pleasure, here’s the latest article from him. He chose to make an insight to typical start-up profiles… Let’s read!

Understanding the basics of how synchronous motors work will surely help you take good decisions upon whether or not to use this type of motor, if you rather get a brushless exciter or not, and choose the right start-up method suitable for your application and power system’s availability.

The next thing you should get to know is how a typical start-up looks like, what problems you might encounter and what are the possible solutions to them.

Normal reactor assisted start-up profile of synchronous motors

Figure 1: Normal reactor assisted start-up profile of a synchronous motor

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Synchronous motors: Motor start-up strategies

June 6th, 2016 | 4 Comments | Posted in Energy Efficiency - motors
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Last day, D.Ros told us about brushless synchronous motor field exciters. Today, he focuses on motor start-up strategies. Enjoy and ask questions if you have any!

As time goes by and industries keep growing and growing exponentially, motors keep getting larger and sites keep moving further away from the power sources, however, most of the times, power systems can’t keep up with the voracious rhythm of industrial growth.

Figure 1 Motor start-up strategies: Failed control panel for an assisted starting method of a synchronous motor

Figure 1: Failed control panel for an assisted starting method of a synchronous motor

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Brushless synchronous motor field exciters

May 12th, 2016 | 3 Comments | Posted in Energy Efficiency - motors
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If either your industrial operations already use synchronous motors or if you are designing a new industrial process that could greatly benefit from the perks of a synchronous motor, probably you have given some thought about the guts of this type of motor.

Now let one of our fellow members of the community D.Ros tell you more about it. Enjoy!

Synchronous motor

Synchronous motor


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The renaissance of synchronous motor control strategies

May 5th, 2016 | 2 Comments | Posted in Energy Efficiency - motors
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Hi dears! Today D.Ros gives us the next article of his article series about motors. As usual, it is very interesting ; just judge by yourself:

Since electrical motors have been around, the cornerstone of heavy duty industrial operations (as crushers, grinders, mills, hoists, blowers, chippers, mixers, compressors, centrifugal pumps, exhausters, etc.) have been driven with synchronous motors for their high power and most efficient way to convert alternating current into mechanical energy; as for, different to asynchronous (induction) motors, their main source of magnetic field is derived from direct current injection rather than through the air-gap.

Ball and SAG mills powered by synchronous motors

Figure 1: Ball & SAG mills powered by synchronous motors in an ore crushing operation

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