motor nameplate information #5 – Reliability

14/03/2011 by 1 Comment

This information is useful for troubleshooting and commisioning.It can tell us about the reliability of electric motor.We can design the area or room with such as good ventilation,enough space for maintenance works and suitable with motor application.

This information also can use for safety purpose.we can design the safety working area for that motor and can protect a user or operator from any electric shock or others danger.

The work load is important to ensure the motor can run efficient and not over their capacity.We must design the motor application suitable with working load. Read more

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motor nameplate information #4 – Safety

13/03/2011 by Leave a Comment

Now in stater motor industry,their design a new advance technology for control a electric motor.In industry the Variable speed drive,soft stater and inverter very common used.It is very efficient and can save a electricity cost.

This time i want explain about safety information for electric motor.This information is safety certificate from third party.For more better electric motor design and function,the manufacture must alert about new technology for motor.

They can design a motor suitable with new technology of motor controller.It can make motor more efficient and can running in full capacity.The important thing is the motor can have more long life span. read more

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How to replace bearings for electric induction motor?

25/02/2011 by 6 Comments

For electric motor failure causes,the common defected for mechanical part is bearing.Normally 1 unit motor have a 2 pieces of bearing and type of bearing for induction motor is ball bearing full metal cover ( ZZ ).

Root cause for bearings problem usually such as rusty due to condensation process,ball in housing broken,grease was burn out,a ball bearing nest broken and overload or motor shaft connected with load is not alignment properly.

For electrician or maintenance person,this is a routine jobs and it is a compulsory skills for this person who involved in electrical motor field.

This time i want share my little experience how to replaced bearing for electric induction motor.Don’t worry, i explain detail step by step how it done in my video.I hope it can be a guideline  to do it yourself in actual workplaces. Read more

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Auto transformer starter

10/10/2010 by 11 Comments

This starter produces high efficiency and have the option to be adjusted to obtain the necessary torque and in accordance with the system.It very efficiency stater but the disadvantage is it very high cost to setup control panel stater.

It can improved torque ratio is achieved and starting current is typically 3 times Full Load Current , depending on the voltage taps selected.Typically it have taps at 50%,65% and 80% voltage.

During start-up, the motor is connected to the auto transformer’s tapping. This means that the motor starts up with a reduced voltage and a correspondingly low current.

 

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Direct on line starter

08/10/2010 by 32 Comments

Around the world it famous with name DOL starter or direct on line starter.This is the most common starting method available on the market and at basic stater for all motor application.The starting equipment consists of only a main contactor and thermal or electronic overload relay.The disadvantage with DOL starter is that it gives the highest possible starting current.

A normal value is between 6 to 7 times the rated motor current but values of up to 9 or 10 times the rated current exist.Besides then DOL starter draw the starting current there also exists a current peak that can rise up to 14 times the rated current since the motor is not energized from the the first moment when starting. read more

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Frequency Inverter

07/10/2010 by 1 Comment

The Frequency Inverter or Frequency Converter is sometimes also called VSD (Variable Speed Drive), VFD (Variable Frequency Drive) or simply Drives, which is probably the most common name.

This device is very common use in industrial sector because it user friendly and easy to install.It usually can control many equipment or machinery such as :

  • Air-Condition
  • Blower & fan
  • Water pump
  • Food processor machine
  • Conveyance machinery
  • Packing machinery
  • Textile machine
  • Machine tools
  • Furnace
  • or ETC

read more

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Calculation of motor capacity

05/10/2010 by Leave a Comment

Electric motor is the one of common device for rotating equipment and it’s useful for smooth operation and make our process more faster and efficiency.

But we must remember,we should sizing the motor capacity properly and must suitable with load,system and application for our process.

We can connect the electric motor with several types of mechanical load with gearbox,pulley,timing chain and etc.Proper calculation is must to avoid overload,bearing damage and motor burn due to wrong estimation about load. read more

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