Caple C702G Wartungshandbuch PDF herunterladen (Seite 175)

8-50

8-11. Power Factor Controller Circuit

This circuit is composed of Low pass filter block and Power feedback block. AC input is rectified by D601,

then it charge C6Y2, C610 and C609.

C610 is not charged during period α and period γ from input voltage directly, because the voltage of

C6Y2 is smaller than the voltage of C610. Then, C610 is charged during period α and periodγby Power

feedback block. When TR1 (internal IC621) turn on, the N1 winding of T6Y1 is charged with energy. When

TR1(internal IC621) turn off, the N2 winding of T6Y1 discharge energy. So, the voltage of point A is the

part of slant line(Fig.8-12 : VC610-VC6Y2).And C610 is charged with feedback energy during period α

and period γ, because the voltage of point A is bigger than the voltage of C610.

C610 is charged during period β(Fig.8-12) from input voltage directly.(Power supply which doesn't have

“Power Factor Controller Circuit” is only charged during this period.)

Finally, the voltage of C610 and input current become Wave of Fig.8-12.The harmonic current is decrease,

and Power Factor is improved. Because C610 is charged not only period βbut also many parts of 1 cycle.

(Fig.8-12) VOLTAGE

・

INPUT CURRENT

C610

C6Y2

GND

Period

INPUT CURRENT

VOLTAGE

GND

C6Y2

C610

C6Y2

C610

C6Y2min

C6Y2

C610

C6Y2

C610

D6Y2

POWER FEEDBACK BLOCK

GND

TR1

IC621

C611

R605

L601

D603

T601

T6Y1

D6Y2

C610

D6Y1

D6Y3

L6Y1

C6Y2

C6Y1

D601

POINT A

LOW PASS FILTER BLOCK

(Fig.8-11) POWER FOCTER CONTROLLER CIRCUIT

C609

1 2 ... 170 171 172 173 174 175 176 177 178 179 180 ... 285 286

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