TY - JOUR

T1 - Optimal Pulse Patterns of Six-Phase Voltage Source PWM Inverter for Double Three-Phase Wound AC Motors

AU - Matsumoto, Hisao

AU - Takami, Hiroshi

PY - 1990

Y1 - 1990

N2 - In this work, we successfully applied a six-phase voltage source PWM inverter to a double threephase wound AC motor to attain both an increase in the capacity of the PWM inverter and a reduction in higher harmonics of the phase voltages of the motor. The system uses a coupling reactor, which has the same configuration as that of a three-phase transformer, inserted between the inverter and the motor by means of special windings. This eliminates the need for control to balance output currents from a pair of three-phase inverters. If six-phase voltages are controlled so that there exists no even-number harmonics in the same wave pattern, the coupling reactor concerned absorbs odd-number harmonic voltages other than the orders of 12p±1 (p=1, 2, 3, …). Hence the elimination of these harmonics from the phase voltages of the motor is achieved. It was possible to eliminate the higher harmonics of the phase voltages of the motor most effectively by applying the optimal pulse patterns obtained through the modern theory of control using Lagrange multipliers, resulting in the motor phase voltage patterns being substantially improved.

AB - In this work, we successfully applied a six-phase voltage source PWM inverter to a double threephase wound AC motor to attain both an increase in the capacity of the PWM inverter and a reduction in higher harmonics of the phase voltages of the motor. The system uses a coupling reactor, which has the same configuration as that of a three-phase transformer, inserted between the inverter and the motor by means of special windings. This eliminates the need for control to balance output currents from a pair of three-phase inverters. If six-phase voltages are controlled so that there exists no even-number harmonics in the same wave pattern, the coupling reactor concerned absorbs odd-number harmonic voltages other than the orders of 12p±1 (p=1, 2, 3, …). Hence the elimination of these harmonics from the phase voltages of the motor is achieved. It was possible to eliminate the higher harmonics of the phase voltages of the motor most effectively by applying the optimal pulse patterns obtained through the modern theory of control using Lagrange multipliers, resulting in the motor phase voltage patterns being substantially improved.

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U2 - 10.1541/ieejias.110.966

DO - 10.1541/ieejias.110.966

M3 - Article

AN - SCOPUS:85007731955

SN - 0913-6339

VL - 110

SP - 966

EP - 974

JO - IEEJ Transactions on Industry Applications

JF - IEEJ Transactions on Industry Applications

IS - 9

ER -