Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2007-12-04
2007-12-04
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S807000, C318S805000, C318S801000, C318S810000
Reexamination Certificate
active
10593285
ABSTRACT:
A motor control apparatus capable of expanding a voltage output and a modulating wave signal generating method for a PWM inverter apparatus of the motor control apparatus, which is controlled by a pulse width modulating signal obtained by comparing a modulating wave signal of a voltage instruction with a carrier wave are provided.An upper limit value calculation unit105and a modulation wave limiter unit4are provided, and an upper limit value14of a modulating wave, which is equal to or smaller than the maximum value of the carrier wave and equal to or larger than the minimum value of the carrier wave is produced in the upper limit value calculation unit105and modulating wave instructions13for a plurality of phases are corrected by the modulating wave control unit4by using the upper limit value14of the modulating wave.
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Ahmet M. Hava et al., “Carrier-Based PWM-VSI Overmodulation Strategies: Analysis, Comparison, and Design”, IEEE Transactions on Power Electronics, vol. 13, No. 4, pp. 674-689, (Jul. 1998).
Morimoto Shinya
Sasaki Akira
Kabushiki Kaisha Yasakawa Denki
Leykin Rita
Sughrue Mion Pllc.
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