Sony PS-FL1 - FG Board Electromotance Explanation; System Block Diagram

PS-FL1/FL1C PS-FL1/FL1C
1-3. BLOCK DIAGRAM
ELECTROMOTANCE GENERATED ON FG BOARD
@) L-CH
fe) R-CH
On the FG board, if the radial pattern @ in Figure The frequencies detected on the FG board are ob-
1 is considered as one conductor, when the rotor tained as follows. = re
rotates, the conductor cuts the magnetic flux, electro- For one radial pattern, sine-wave electromotance is ee ' a
motance is generated on the conductor, and its generated one time for 2 SN poles. . 3 = i Ke R: = -
direction changes from the Fleming’s right-hand rule Therefore, when the rotor rotates one time: zs & < a
to that in Figure 1. 256 (poles) + 2 = 128 (times) e epcaciaiee: che tae
Overall, the spacing of the radial pattern on the FG For 45 rotations: S {i Z
board and the rotation speed detection sine-wave 128 (times) x 45 (rpm) + 60 (seconds) = 96 (Hz) = =e 2.
magnet peak is the same, so the electromotance In the same way, for 33!/3 rotations: ; ee SF Annan,
generated
in
all
of
the
patterns
is
directed
in
a
128
(times)
x
331/3
(rpm)
+
60
(seconds)
=
71.1
(Hz)
a8
re
COOOO
uniform direction as shown in Figure 2 if the pattern 2
is considered as one loop.
a
Therefore, the electromotance generated on the one Hie re £
pattern @) on the FG board has 256 poles worth of . pS ee =e e = cc
; . : magnet zs sg iat =o =
electromotance added. (circular integral method) i =, vetorrotatipin aa =z = 2 as
!
1
©
direction
E
3
= =
i:
=O
co i : 1 pattern
CH)
@)
ai
Sto-|
POWER
8V 50mA
STANDBY -» ON
)
PLIOl
Pero!
)
ied
Oo
.
FG
board
to
i
a
3 s s as we 8 o| ae] 5 g
; FG board pattern direction of current 2 Se za = we @ Wo (4) = 2 Sia ' eS
FG Board Pattern Diagram (pattern surface) eres = S= aes ae a a to ~ofels| tt te
“|
ci
«3
rane)
~~
nae
fa)
2°)
ole]
-
a
> SO of uj = Woo S B >
& ad Eo Oo? x y © z z
Electromotance 3 Qs g z Ai ° 7 a Zz
direction () Z r= 3 o ~ o
conductor
®
:
;
:
L
for N pole wo K
i
on
Sw
Fig. 2 Sw 2 Mw 8 & S tS)
ost? ms aw aN
°
N
es
©
ro)
g
® S z= z= 2 2 | |Z 2 =
Y N wt us =< = ad = o
° ° C= o= oF of
for
S
pole
=
ze
z
8
e
ES!
[ES
es
ES
ot a és a a a a 3
¥ Sz es am oz =
bed
© yy oO zs ze 0
a5 g ) O—®) ©)
External flux noise a2 2 or © © ri
negation pattern 2_ Ze 2 2 3
o oe 4 >
magnet
flux
Ge
QF
a
2
a
Fd
5 zs
a xs
Be ee gs electromotance = FS
cutting direction =
magnet flux 4
| :
| motion
SYSTEM CONTROL
INDICATION
-—=--—
_- —-—— — — >
Ag)
Nay,
> KEY INPUT
a
QoQ
°
2/3
Sr
> -| oe a
a 1} >- 5 Ga oO. a
N
Ww
2
a
2b
ow
2, = Zz >+ID ee
a = Hao o}Mk
ONY
—_
>
21s
eo}. oO = Sol
S
s
©
©
@
O—H)
EOE
se:
<x
1-607-274-11
5
=
nn
[Sl- 47
magnet pole movement
@) @) :
Sk =o
5} 2 oS
ing’s
ri
=
ua)
©
J
ES
Fleming's
right-hand
rule
4
2
=|
S|
pas
—~
s
Sw
2
=
=e
oO = a, Oo Q = > a mn ag
=
=
cs
=
Zw
Zw
a
°
S
of
=|) [ai za aa Fo
: =-1 a a w2 CoB =
cad
ZIT
[5
#8!
38
3
° < 2 =\0o Zo ° ° °
rn anh o On tH, c}S \ \
oe ae o ow aaw
= 2 ee ——
= Sa Ss re i
aie =a = NY NY ray a
~2
rlujoceZ
oF
aa
zo
ra
78)
eo BLS 0/Z3| ofES! zw ——~ —~
- a aia ot] Hee) Ow ws -
im oe so BG at) 6 FO ey
=
~
~
aay
or
—-Lte
on SS5 esa
oa
=
m=
-2h
st 6 WS Se
oO n
ow hes F,
wea
n
—19— . , —20—