Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1984-05-08
1987-02-03
Smith, Jr., David
Electricity: motive power systems
Induction motor systems
Primary circuit control
363 42, H02P 540
Patent
active
046410759
ABSTRACT:
An inverter current controlling method wherein output currents of an inverter having a plurality of switching elements and connected to a three-phase load are detected, and the switching elements are ON/OFF controlled so that the waveforms of the output currents are approximated to set output current wave commands, respectively, comprising: maintaining a specific switching element in a specific state so that a specific output terminal of the inverter is fixed to a specific polarity during a period of time when a specific ideal phase voltage of the three-phase load corresponding to the output current wave command is in a predetermined phase; and ON/OFF controlling the switching elements other than the specific switching element during the period of the predetermined phase so that the output current waveforms are approximated to the output current wave commands, respectively. Also disclosed is an inverter current controlling apparatus suitably employed in the above-mentioned method.
REFERENCES:
patent: 4028600 (1977-06-01), Blaschke et al.
patent: 4459534 (1984-07-01), Nagase et al.
patent: 4481457 (1984-11-01), Zach et al.
Asano Katsuhiro
Inaguma Yukio
Iwama Norio
Kabushiki Kaisha Toyota Chuo Kenkyusho
Smith Jr. David
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