Preventive Maintenance of 3 phase induction Motor

PREVENTIVE MAINTENANCE Most electrical equipment requires planned inspection and maintenance to keep it in proper working condition. Periodic inspections prevent serious damage to machinery by locating potential trouble areas. Observant personnel will make full use of their senses to diagnose and locate problems in electrical machinery: the sense of smell directs attention to burning insulation;…

Differences between Synchronous Motor and Induction Motor

  AC motors can be categorized into two types: asynchronous motor and synchronous motor. An asynchronous motor is also called as induction motor. The two types are very different from each other. This paper is focused on the differences between an induction motor and a synchronous motor. Difference on Construction Induction motor: the stator winding…

How to do Motor terminal connection

This part is very important to ensure our electric motor installation is done perfectly and running properly.If we wrong setting for voltage value connection for induction motor,it can cause serious damage. But dont worry,this time i explain detail how to determine a motor terminal connection for suitable with our power supply.The key is motor nameplate.We…

Motor current calculation using Winding resistance

Motor current calculation: The relationship between current (measured in amperes), resistance (measured in ohms) and voltage is found in one of the basic laws of electricity and electronics: Ohm’s Law. Ohm’s Law says that current is directly proportional to voltage and inversely proportional to resistance. This means that, if we know the resistance of a…

Difference between resistence and capacitance start induction motors

RESISTANCE-START INDUCTION- RUN AND CAPACITOR-START INDUCTION-RUN MOTORS Resistance-start induction-run and capacitor-start induction-run motors are very similar in construction. The stator winding of both motors contains both a start winding and a run winding. The start winding is made of smaller wire and placed higher in the metal core material than the run winding.                                            …

How to stop DC motor using electric breaking

Electrical braking The running motor sahll be stop  by either mechanical braking or electrical braking. For smooth operation we need electrical breaking.The electric braking of a DC motor is of three types, (i) Rheostatic or dynamic braking, (ii) Plugging or reverse current braking (iii) Regenerative beaking. (i) Rheostatic or dynamic braking: In case of DC…

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