Current Regulator - Piper PA-24 Comanche Service Manual

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PIPER COMANCHE SERVICE MANUAL
CIIIIIJIT
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FIGURE 9-3. WIRIHG CIRCUIT 0' THRII UNIT REGULATOR
openinl the rei'll_or poiAtl opla the rep1ater . . .a willdilll circ1&it
10
tbt ita
lD"-tic
field
collapses completely. The caaaequenc. ia that the lUpatie fieW fa
redl&Cad sqfficiatly to .110.
the spital sprinl to pull the .rmature .way &c. tile cara so that tile CClatact
poUlts
.Iain clo...
This directly Itouads the tenerator field circuit so til. . . .rator volt. cd output bleN.e.
The above cyde of actiClll .pill
c....
place
.d
the cycle coatiJl.e••t • rate
of 50
to
200
tilDes
a secCllld. teplatinl the volt• • to a predetenlliaed value. With the volta.. thu
ll_ited the
pa-
atatCl' suppU•• varyiDl _OIUltli
of
curreat to JHet the vuyiDl
_at..
IX bettery ch. . . aad elec-
trical lotld.
9-24.
Curren'
"'uletor.
a. The cUlTent replater (Fipre 9-03) h.. a seri•• wiIldiq IX a fe. tUlU
r.I. heavy
wire
which
carries aU pnerater output. The wiDdml con is
u._bled into a
f~.
A fl.t . . . 1 araaatww
is
attached to the frame
by • nexible hiDle so til. it
is jast
.bove the
care.
n.
umature
has
a
e ent.ct point which is jut belQW a Itatiaaary CaDtect point. Whee the ClIINIlt recuJator is
Qot
operatiaa, the te.iOll of a spiral -prilla hoJd. the
armature
a. . y ftOlD the core
'0
th. the poillts
are
in
contact. In this sw-itiOll the .... rator neW cir=it is cOlllpleted to IfOUIld tllrcalP the
current feculator CCXltact points in serie. with the volt "'Plater COIltact poillts.
b. When
the
1* demuds
ItO
heavy, a. fer ple. wben electrical devic..
ate
tumed
OIl
and tha battery is in a disc:harpd coaditiOll. the volta.. lIIey aot iA=-se to a value sufficient to
cause the volt_p rel'll.tor to operate. COIl. . . . tly. . . . rater output will coatmue to ina.ea.
until the pnerator re*=hes rated maximum cunellt. This ill die current value fer which the cwrent
recul.tor is set. Therefore. when the leaerator re.a.. raed output. this output. nowiDl
throup
the currwnt repillter willdine. Cnlate. sufficiat 1Il8l.U-
to pull the cunent teaulator arm.ature
down and
Qpeft
the contact poin.ts. With the poillta
opeD.
,..istlllC8 is Lnerted iAto the . . . rator
field circuit so that the lenerator output is
reduc::ed.
c. As soon as
the pn.tatClt output stans to fall off. the mapetic
field of
the current recul.tor
ELECTRICAL SYSTEM
ISSUED: 8118172
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