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(1) Boosting and varying DC voltage Vd
It boosts the DC voltage to the valve corresponds to the rotation speed with a detected DC voltage by the micro computer.
Its component is basically made of a boosting chopper circuit.
The current I
is absorbed into the reactor for On time and discharged to the capacitor for Off time with high frequency
1
chopping. (I
)
2
It controls a chopper duty of Q1 so that a current be absorbed into the reactor and a current be consumed by the inverter are
balanced. At high loading, DC voltage is boosted as many duties (absorbing current much).
Reactor
IC
Analog voltage
D-bus filter
Instructions voltage
(PWM output)
ACT element
+
Q1
I
1
I
DC voltage
234
P
Compressor
M
2
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