Inverter apparatus for air conditioner

Details Inverter apparatus for air conditioner Inverter apparatus for air conditioner

1995-09-11

1997-02-18

Hecker, Stuart N.

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

363 41, 318811, H02M 324, H02P 528

Patent

active

056046723

ABSTRACT:
In an inverter apparatus for air conditioner for converting DC voltage supplied from a DC power source into pseudo AC voltage of variable voltage and variable frequency by means of pulse-width modulation, a control circuit varies pulse-widths of the pseudo AC voltage in response to degree of rise/drop of the DC voltage from the nominal DC voltage; and when the voltage has an insufficient value to obtain the frequency-voltage characteristic, the control circuit controls switching devices to issue a maximum AC voltage obtained by the present DC voltage independent of frequency.

REFERENCES:
patent: 4315203 (1982-02-01), Ibamoto et al.
patent: 4678063 (1987-07-01), Kitaoka et al.
patent: 4924168 (1990-05-01), Horie et al.
patent: 5072354 (1991-12-01), Katto et al.
patent: 5086266 (1992-02-01), Shiga et al.
patent: 5519301 (1996-05-01), Yoshida et al.

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