Capacitors store electric charge and consist of two conductors separated by an insulator. They have many applications in radios, electronic circuits, fans, and motors. There are two types of capacitors - fixed capacitors with a fixed capacitance value, and variable capacitors with an adjustable capacitance value. The charge stored by a capacitor is proportional to the potential difference between its plates, and the capacitance is the constant of proportionality. Energy efficient motors improve efficiency by reducing losses through improved design and materials, allowing them to provide the same energy output while using less energy input.

2. Capacitors
A capacitorisadevicethat storeselectric charge.
A capacitor consistsof two conductorsseparated by an
insulator.
Capacitorshavemany applications:
Radiosand electronic circuits.
Fans, motor e.t.c.
Thereare2 typesof capacitor.
 Fixed capacitorswith fixed capacitancevaluesand
variablecapacitorswith variable(or adjustable)
capacitancevalues.

3. A fixed capacitor isconstructed in such manner that it
possessesafixed valueof capacitancewhich cannot be
adjusted. A fixed capacitor isclassified according to thetype
of material used asitsdielectric, such aspaper, oil, mica, or
electrolyte.

4. VARIABLE CAPACITOR
A variablecapacitor isconstructed in such manner that its
valueof capacitancecan bevaried.
E.g tunearadio
Symmetric diagram of capactor

5. Capacitors and Capacitance
Charge Q stored:
CVQ =
Thestored chargeQ isproportional to thepotential difference
Vbetween theplates. ThecapacitanceCistheconstant of
proportionality, measured in Farads.
Farad = Coulomb /Volt
A capacitor in a simple
electric circuit.

6. ENERGY EFFICIENT MOTOR

7. Energy Efficiency Purpose
Thepurposeof energy efficient motorsisto beableto supply
thesamelevel of energy serviceonly using lessenergy.
Efficient energy useisachieved primarily by meansof amore
efficient technology or processrather than by changesin
individual behavior.
Energy conservation reducestheenergy consumption.

8. Efficiency
 Definition of "efficiency".
 For an electric motor, efficiency istheratio of mechanical
power delivered by themotor (output) to theelectrical
power supplied to themotor (input).
Efficiency = (Mechanical Power Output / Electrical Power
Input) x 100%

9. Thus, amotor that is85 percent efficient converts85
percent of theelectrical energy input into mechanical
energy.
Theremaining 15 percent of theelectrical energy is
dissipated asheat, evidenced by arisein motor
temperature.
Energy efficient electric motorsutilizeimproved motor
design and high quality materialsto reducemotor losses,
thereforeimproving motor efficiency.

10. Description of motor component’s losses
Copperloss:
Iron loss:
Friction and windage loss:

12. Cost of energy efficient motors:
Usually it is of normal cost and slightly more than
the normal motors. It is about 15% to 30% more
than the normal motors.
In Future, the initial cost may be available at the
same cost as a standard motor when the
population of EE Motors increases

13. Advantages
The EEM has a greater efficiency than a standard motor;
therefore they have less operating costs.
EEM has a lower slip so they have a higher speed than
standard motor.
EEM can reduce maintenance costs and improve
operations in industry due to robustness and reliability.

14. Application
Energy efficient motors are specially suited for
industries which are power intensive and equipments
which run on constant load for long duration.
For example: fans, blowers, pumps, compressors etc. are
some of the driven equipments and industries such as
textile, paper, cement, power generation etc.

15. THANK YOU