Hitachi RAF-35NH5 Service Manual page 278

. Power Factor Control Circuit
ower factor is controlled by almost 100%. (Effective use of power)
With IC in ACT module, control is performed so that input current waveform will be similar to waveform of input
voltage.
Effective
voltage
area
Invalid power area
(Even if voltage is applied. current does not flow)
*Assuming the same current capacity (20A), power can be used about 10% effective, comparing with curent use
(power factor of 90%), and maximum capacity is thereby improved.
I (input current)
V (input voltage)
input voltage
Effective
voltage area
- 308 -
input current