DIRECT-TYPE CONVERTING APPARATUS AND METHOD FOR CONTROLLING THE SAME
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Abstract
An output voltage of a converter is given to a pair of DC power supply lines. Inverters are connected in parallel with each other between the DC power supply lines. When one inverter is operated based on a first zero vector and the other inverter is operated based on a second zero vector, a commutation is caused in the converter. The first zero vector and the second zero vector are different from each other. For example, all of high-arm side switching elements of the one inverter and low-arm side switching elements of the other inverter are rendered non-conducting, and all of side switching elements of the one inverter and high-arm side switching elements of the other inverter are rendered conducting.
25 Citations
26 Claims
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1-10. -10. (canceled)
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11. A method for controlling a direct-type converting apparatus, said direct-type converting apparatus comprising:
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a converter configured to rectify multi-phase AC voltages to output them to a pair of DC power supply lines; and a first inverter and a second inverter being connected in parallel with each other between said pair of DC power supply lines, either of them being operated in a pulse-width modulation according to an instantaneous space vector control, said method comprising; causing a commutation in said converter, when said first inverter is operated based on a first zero vector while said second inverter is operated based on a second zero vector, said first zero vector and said second zero vector being different from each other. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A direct-type converting apparatus comprising:
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a converter configured to rectify multi-phase AC voltages to output them to a pair of DC power supply lines; a first inverter and a second inverter being connected in parallel with each other between said pair of DC power supply lines; a first inverter control section configured to output a first control signal for operating said first inverter in a pulse-width modulation according to an instantaneous space vector control; a second inverter control section configured to output a second control signal for operating said second inverter in a pulse-width modulation according to an instantaneous space vector control; and a converter control section configured to output a third control signal for causing a commutation in said converter when said first inverter is operated based on a first zero vector while said second inverter is operated based on a second zero vector different from said first zero vector. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification