Limbaja Energy

Electrical Motor Efficiency Study

Electrical Motor Efficiency Study

Overview

Electric motors are among the largest consumers of electricity in industrial facilities, making their performance and efficiency critical to overall energy management. Evaluating motor operating conditions helps identify energy losses, improper loading, and opportunities to improve system performance and reliability. At Limbaja Energy, we provide Motor Audit Services in Gujarat for industries across Gujarat and India. Our Motor Energy Audit Services include motor efficiency assessments, electric motor performance analysis, and efficiency testing to identify energy-saving opportunities, optimize motor operation, reduce power consumption, and improve the reliability and performance of industrial motor systems.

Losses considered:

Constant losses, Core losses, Friction and Windage losses
Stator copper losses
Rotor copper losses
Stray losses

The stray losses are difficult to measure with any accuracy. IEEE Standard 112 gives a complicated method. Which is rarely used on shop floor. IS & IEC standards take fixed value as 0.5% of output. It must be remarked that actual value of stray losses is likely to be more. IEEE – 112 specifies values from 0.9 to 1.8%.

Case Study

Overview

  • Application: All Induction motor more than 50HP.
  • Type of Audit: Motor Efficiency Study.

Motor Efficiency Calculation

SNDescriptionsUnitValue
1No of poles-6
2Winding connection-DELTA
3Type-TEFC
4OutputkW180
5VoltageVolts415
6Full load current, IflAmp311
7Phase current at Full load, Ifl-phAmp179.6
8Speedrpm990
9FrequencyHz50
10Full load slipp.u.0.010
11Efficiency%90
12Insulation-Class F
13Full load winding temperature0C85
--No load test----
14Line voltage, UVolts415.67
15Line Current, InlAmp118.7
16Phase current, Inl-phAmp68.5
17No load power input, Pi-nlWatts9183
18Stator phase resistance at cold conditionOhms0.4333
19Stator phase resistance after no load testOhms0.4333
20Ambient Temperature, Ta0C30
21Frequency, fHz50
22Winding resistance at full load Rph-flOhms0.5233
--Calculation of losses----
23No load power input, Pi-nlWatts9183.33
24No load stator copper loss at T1 Temp.Watts6102.1
25Iron, friction and windage lossWatts3081.23
26Stator full load copper lossWatts50611.24
27Synchronous speed-1000.0
28Full load slip-0.01
29Rotor Input powerkW181.82
30Rotor ohomic losskW1.8
31Stray loss 1.5%kW2.7
32Total losskW58.21
33Motor full load input powerkW238.2
34Efficiency%75.563

Explore Related Services

Detailed Energy Audit
View Details
Detailed Energy Audit

Energy Audit is defined as “the verification, monitoring and analysis of use of energy including submission of technical report containing recommendations for improving energy efficiency with cost benefit analysis and an action plan to reduce energy consumption”. It builds on the principle "you can't manage what you don't measure". It essentially combines the principles of energy use and statistics.

Energy Conservation
View Details
Energy Conservation

Energy conservation is the practice of reducing energy consumption through efficient energy management and the optimal use of resources. This can be achieved by using energy more efficiently to deliver the same level of performance or by minimizing unnecessary energy usage. At Limbaja Energy, we provide Energy Conservation Services in Gujarat for industries across Gujarat and India, offering energy-saving solutions, energy efficiency consulting, and industrial energy optimization services. Our expert team helps businesses reduce operating costs, improve equipment performance, and achieve long-term energy efficiency through practical and sustainable solutions.

Harmonic Analysis
View Details
Harmonic Analysis

Harmonic analysis is a technique used to study and analyze the harmonic components in electrical power systems. It helps identify the presence and impact of harmonic currents and voltages, which are integer multiples of the fundamental frequency and are commonly generated by non-linear loads such as power electronics, variable speed drives, and certain lighting systems. At Limbaja Energy, we provide Harmonic Analysis Services in Gujarat for industries across Gujarat and India. Our Power Quality Analysis and Electrical Harmonic Study Services help identify harmonic distortion, improve power quality, protect sensitive equipment, and enhance the reliability and efficiency of electrical systems. We also recommend effective harmonic mitigation solutions to reduce power losses and ensure stable system performance.

Compressor Air Flow Audit
View Details
Compressor Air Flow Audit

A compressed air audit helps identify system inefficiencies, reduce energy costs, and improve the overall performance of compressed air systems. Many industrial air compressors operate inefficiently due to air leaks, artificial demand, pressure losses, and incorrect operating pressures, resulting in unnecessary energy consumption and increased operating costs. At Limbaja Energy, we provide Compressor Audit Services in Gujarat for industries across Gujarat and India. Our Compressed Air Energy Audit Services include compressor efficiency assessments, performance analysis, and compressed air system optimization to identify energy-saving opportunities, improve system reliability, reduce power consumption, and maximize the efficiency of industrial compressed air systems.

View All Services
Chat with us