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(11) | EP 2 262 092 A8 |
(12) | CORRECTED EUROPEAN PATENT APPLICATION |
Note: Bibliography reflects the latest situation |
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(54) | Inverter controlling apparatus, and air conditioner and washer using the same |
(57) Provided is an inverter control apparatus (5) incorporating therein a current reproduction
unit (6) which inputs information from a DC-bus current detector 4 for detecting the
instantaneous phase currents that flows into an electric motor (1) and that is contained
in the DC-bus current flowing into the inverter (2) from a DC power source (3), and
which reproduces phase currents that flow into the motor (1) on the basis of the values
of the instantaneous phase currents, wherein, in the voltage saturation range, the
current production unit (6) calculates the phase currents flowing into the motor (1)
on the basis of the average DC-bus current obtained through filtering the DC-bus current
and an instantaneous phase current for a single phase; and the voltage commands for
the voltages to be applied to the inverter (2) is calculated by using the phase currents.
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