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To,
The Project Incharge
ECE Department
Sobhasaria Engineering College
Sikar (Rajasthan)
Sub: Requesting for Project Guide for completion of Project as
per RTU norms.
Respected Sir,
This is to inform you that we are student of 4th year VIIIth
Sem.(ECE) is planning to give Project onWashing Machine Motor
Controller as per RTU norms. So, We are requesting you to give
us
a permission to work under the guidance Mr. Hitesh Kr. Bajaj
(Sr. Lecturer of ECE Department).for completion of our Project
successfully.
Kindly allow us for the same. We will be highly obliged to you
for this act of kindness.
Thanking you,
Yours Sincerely
Date: 24-02-13
1. Name : Vinod kumar
Roll. No. : 09ESOEC126
Phone No : 9509509710
Mr. Hitesh Kr. Bajaj (Project guide) 2. Name : Sunit
parashar
(Sr. Lecturer, ECE Department) Roll. No. : 09ESOEC119
Phone No : 9636157413
Mr. Indranil Sarkar 3. Name : Prabhudayal
(Asst. Prof., ECE Department) Roll. No. : 09ESOEC085
Phone No : 7877258504
Mr. Devendra Singh
(HOD, ECE Department)
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ABSTRACT
Major Project Title
Washing Machine Motor Controller
Washing machines usually employ a single-phase motor. In
semiautomatic washing machines, a purely
mechanical switch controls the timing and direction of the
motor. These switches are costly and wear out
easily. Heres a controller for single-phase motors of washing
machines that efficiently replaces its
mechanical equivalent. Basically, a single-phase motor requires
a master timer, which decides the time for
which the motor should keep rotating (washing time), and a spin
direction controller, which stops the
motor for 3 seconds after every 10 seconds and then resumes
rotation in opposite direction.
The direction of rotation can be controlled. When switch S1 is
in position A, coil L1 of the motor receives
the current directly, whereas coil L2 receives the current with
a phase shift due to capacitor C. So the rotor
rotates in clockwise direction. When switch S1 is in position B,
the reverse happens and the rotor rotates in
anti-clockwise direction. Thus switch S1 can change the rotation
direction. The motor cannot be reversed
instantly. It needs a brief pause between switching directions,
or else it may get damaged. For this purpose,
another spin direction control timer (IC2)is employed. It is
realized with an IC 555. This timer gives an
alternate on and off time duration of 10 seconds and 3 seconds,
respectively. So after every l0 seconds of
running (either in clockwise or anticlockwise direction), the
motor stops for a brief duration of 3 seconds.
The values of R3 and R4 are calculated accordingly.
Guides Name :
Mr. Hitesh Kr. Bajaj
1. Name : Vinod kumar
Enroll. No.:09E1SOECM10P126
Contact No. : 9509509710
2. Name : Sunit parashar
Enroll. No.:09E1SOECM10P119Contact No. : 9636157413
3. Name : PrabhudayalEnroll. No.:09E1SOECM10P085Contact No. :
7877258504
