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Electric Motor Bearing Failure: Symptoms and Causes
The majority of failures that take an electric motor out of service start not in the windings or the control board, but in its mechanical heart: the bearings. A bearing is the part... More Details
Mehmet Yılmaz
Chief Editor
Mehmet Yılmaz is the chief editor of the DRG Motor content team. For 3 years he has been producing content on industrial electric motors, focusing on IE3, IE4 and IE5 efficiency classes and energy-efficiency regulations. He oversees the accuracy and editorial quality of the published technical content.
Mehmet Yılmaz — Articles
Electric Motor Selection for Marine and Ship Applications
Equipment operating at sea faces a far harsher world than its land-based counterpart. Constant salt spray, high relative humidity, the changing inclination angles caused by the shi... More Details
Power Quality for Motors: Voltage Sags and Harmonics
An electric motor runs healthily only if the energy feeding it is as sound as the motor itself. Under ideal conditions, the voltage coming from the grid should have a constant ampl... More Details
Electric Motor Selection for Oil and Gas Facilities
Oil and gas facilities are industrial environments where electric motors must operate to the highest standards of reliability and safety. In the processes of refining, pumping, and... More Details
How to Reverse the Rotation Direction of an Electric Motor
The rotation direction of an electric motor may look like a minor detail at first glance, but in many applications it is a critical matter that determines whether the job can be do... More Details
Electric Motors for Rolling Mills and Metal Forming
Rolling mills and metal forming facilities are production environments where electric motors undergo some of their toughest tests. The process of crushing hot metal between rolls t... More Details
Motor Protection Relay Selection and Coordination
The lifespan of an electric motor largely depends on choosing the right electrical equipment to power and protect it. No matter how high the quality of the motor itself, if a suita... More Details
Electric Motor Selection for Wastewater Treatment Plants
Wastewater treatment plants are industrial facilities that play a critical role in protecting environmental health and must run without interruption around the clock. The process o... More Details
Electric Motor Selection for Cement Plants
Cement manufacturing represents one of the harshest operating environments in heavy industry. From crushing raw materials to firing clinker, from grinding to packing, hundreds of i... More Details
Motor Selection for Escalators and Moving Walkways
Escalators and moving walkways carry millions of people every day, from shopping malls and metro stations to airports and business centers, and they are expected to run without int... More Details
Mechanical Resonance and Critical Speed in Electric Motors
Every mechanical structure has a frequency at which it vibrates most easily when slightly disturbed; this is called the natural frequency. The sound you hear when you tap a glass w... More Details
Motor Room Ventilation and Heat Management
An electric motor cannot convert all the electricity it draws into mechanical power; some of it is inevitably turned into heat. For a single motor this heat may seem small, but in ... More Details