26-08-2011, 01:23 PM
I am RAHUL MARATHE..now i am final year B.Tech ELECTRICAL studant.
My seminar topic is ENERGY EFFICIENT MOTOR.
I want some data from u about my seminar topic,for guidance n best result.
please provide me data.
26-08-2011, 01:23 PM
I am RAHUL MARATHE..now i am final year B.Tech ELECTRICAL studant. My seminar topic is ENERGY EFFICIENT MOTOR. I want some data from u about my seminar topic,for guidance n best result. please provide me data.
18-01-2012, 01:47 PM
I am anjali ..now i am final year B.Tech ELECTRICAL studant.
My seminar topic is ENERGY EFFICIENT MOTOR. I want some data from u about my seminar topic,for guidance n best result. please provide me data. on my gmail anjalibrahmi[at]gmail.com
05-11-2012, 02:11 PM
ENERGY EFFICIENT MOTOR
ENERGY EFFICIENT.docx (Size: 15.43 KB / Downloads: 69) INTRODUCTION Thus energy-efficient electric motors reduce energy losses through improved design, better materials, and improved manufacturing techniques. Replacing a motor may be justifiable solely on the electricity cost savings derived from an energy-efficient replacement. This is true if the motor runs continuously, power rates are high, the motor is oversized for the application, or its nominal efficiency has been reduced by damage or previous rewinds. The electric motors consume a significant amount of electricity in the industrial and in the tertiary sectors of the European Union. Because of its simplicity and robustness the three-phase squirrel-cage induction motor is the prime mover of the modern industry. The electric motor manufacturers are seeking methods for improving the motor efficiencies, which resulted in a new generation of electric motors that are known as energy efficient motors. Analysis of energy efficiency motors and power controllers Voltage Control Voltage alone can be used as a source of intelligence when the switched capacitors are applied at point where the circuit voltage decreases as circuit load increases. Generally, where they are applied the voltage should decrease as circuit load increases and the drop in voltage should be around 4 – 5 % with increasing load. Voltage is the most common type of intelligence used in substation applications, when maintaining a particular voltage is of prime importance. This type of control is independent of load cycle. During light load time and low source voltage, this may give leading PF at the substation, which is to be taken note of. KILOVAR Control Automatic Power Factor Control Relay It controls the power factor of the installation by giving signals to switch on or off power factor correction capacitors. Relay is the brain of control circuit and needs contactors of appropriate rating for switching on/off the capacitors. There is a built-in power factor transducer, which measures the power factor of the installation and converts it to a DC voltage of appropriate polarity. This is compared with a reference voltage, which can be set by means of a knob calibrated in terms of power factor. Intelligent Power Factor Controller (IPFC) This controller determines the rating of capacitance connected in each step during the first hour of its operation and stores them in memory. Based on this measurement, the IPFC switches on the most appropriate steps, thus eliminating the hunting problems normally associated with capacitor switching. Technical aspect of energy efficiency motors 1) Energy-efficient motors last longer, and may require less maintenance. At lower temperatures, bearing grease lasts longer; required time between re-greasing increases. Lower temperatures translate to long lasting insulation. Generally, motor life doubles for each 10°C reduction in operating temperature 2) Select energy-efficient motors with a 1.15 service factor, and design for operation at 85% of the rated motor load 3) Electrical power problems, especially poor incoming power quality can affect the operation of energy-efficient motors 4) Speed control is crucial in some applications. In polyphase induction motors, slip is a measure of motor winding losses. The lower the slip, the higher the efficiency. Less slippage in energy efficient motors results in speeds about 1% faster than in standard counterparts. 5) Starting torque for efficient motors may be lower than for standard motors. Facility managers should be careful when applying efficient motors to high torque applications.
22-02-2014, 08:36 AM
iam ram,, my topic in energy saving motors or energy efficient motos
please mail me total document.. my mail raamasolar45[at]gmail.com please send me energy efficient motors document my mail id raamasolar45[at]gmail.com please send me energy efficient motors document my mail id raamasolar45[at]gmail.com |
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