Engineering seminar report and ppt representation
- 1. BASAVAKALYAN ENGINEERING COLLOGE BASAVAKALYAN A Presentation on “ Energy efficient motors” Name: bhuvaneshwari Usn : 3BK20CS006
- 2. Contents What is energy efficient motors? Determining and comparing motor efficiency Requirement of Increasing Efficiency of Induction Motor Restrictions to The Development of Energy Efficient Motors Ways of improving efficiency Advantages Disadvantages
- 3. What is energy efficient motor? An energy efficient motor is a motor that gives you the same output strength by consuming lesser amount of power.
- 4. . Fig: Energy efficient motor
- 5. Determining and comparing motor efficiency Apparent Efficiency Apparent efficiency is the product of motor power factor and minimum efficiency. With this definition energy consumption can vary considerably with the power factor. Calculated Efficiency This term refers to an average expected efficiency based upon a relationship between design parameters and test results. Specifications should not be based on calculated efficiency values.
- 6. Requirement of Increasing Efficiency of Induction Motor Here are some fundamental considerations that would increase the importance of electric motor efficiency . These are: In the present scenario electric motors are consuming about 40% to 50% of the total generated electrical energy. The cost of total electrical energy used by an electric motor is about 120% of its purchase price.
- 7. Fig : Power flow in conventional pumping set
- 8. Fig : Power flow in energy efficient pumping set
- 9. Restrictions to The Development of Energy Efficient Motors There are number of factors that restrict the development of energy efficient electric motors. The following are few principle factors among these: Ignorance Mental structure of consumers International standards
- 10. WAYS OF IMPROVING EFFICIENCY The various ways of improving efficiency includes: a) Reduction of iron losses b) Reduction of flux density c) Usage of low loss magnetic material d) Reduction of stator and rotor copper losses e) Increasing the copper section i.e., the stator slot area or rotor bar section f) Increasing stator yoke g) Reducing rotor diameter
- 11. Advantages Increasing the productivity. Efficiencies are 3% to 7% higher compared with standard motors. Design improvements focus on reducing intrinsic motor losses.
- 12. Disadvantages 1)High initial cost. 2)Less torque. 3)Unable to use for multi-speed applications. 4)Doesn’t suitable for interrnittent duty cycle.
- 13. Conclusion Higher efficiency motors (HEMS OR EEMS) are preferred than that of standard efficiency motors ,because increased efficiency saves significant amount of energy consumed and therefore saves energy bill, costs incurred over maintenance of the standard motor. However EEMS may not always lead to lower power consumption . Sometimes there would be an increase in energy consumption rather than a decrease due to the smaller slip in selecting a suitable motor.
- 14. Thank you