Samsung F1015JGB/YLP Service Manual page 10

5. Main function
12) Unbalance detecting & laundry balance positioning system
① Just before the hydrating process and just after reversal rotation for balancing laundry position, this function is
carried out
② The initial 6 sec is the period of reversal rotation for balancing laundry position , Drum rotates 50rpm for
initial 6 sec
③ Next 10 sec, the rotation increases the speed from 50 rpm to 90 rpm slowly
④ During the next 18 sec, drum rotates at the speed of 90 rpm, the sensor decides the degree of laundry
unbalance with TACHO data which is attached to motor
⑤ If the degree of unbalanced laundry is over 6 times to default value, laundry balancing system carries out
feed back process 6 times
Unbalance detecting & laundry balance positioning system
600rpm
500rpm
90rpm
13) R.P.M control
The rotating motor enables the magnetics( i.e generator) to generate magnetic flux in proportion to r.p.m,
magnetic flux induced by coil sensor in the opposite side produces the wave like the figure below to d Φ /dt and
via rectangual wave generating citcuit, the waves reaches MICOM and micom controls r.p.m with the pulse,
count and cycle inputted by program.
<COIL electrical wave at both ends>
20 sec
laundry scattering
unbalance
detecting range
500rpm
V (VOLT)
9
600rpm
Vp
T (HOUR)