DC INVERTER MULTI VRF MAINTENANCE
191
IPM
module
The IPM module integrates 3
pairs of complementary IGBT
tube and controls their
connection and disconnection
via PWM wave, so that the DC
bus voltage is applied to
different stator windings of the
compressor in different time
section and the current is hence
generated on the stator.
Meanwhile, magnetic field is
induced on the rotor windings,
thus to push the rotor and drive
the compressor to run.
PFC
module
The PFC module integrates 4
diode tubes and 2 MOS tubes.
They convert the AC input
power into DC power.
Meanwhile, the connection and
disconnection of MOS tube is
controlled via PWM wave, thus
to realize the voltage rise under
the function of electric induction.
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