Power Factor Control Circuit - Hitachi RAM-55QH5 Service Manual
Outdoor unit
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Also See for RAM-55QH5:
- Installation manual (2 pages) ,
- Information booklet & user manual (68 pages)
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12. Power Factor Control Circuit
Power 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.
I (input current)
input voltage
V (input voltage)
Effective
input current
voltage
area
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.
– 94 –
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