Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Patent
1997-06-20
1999-06-01
Wong, Peter S.
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
363 17, H02M 7515
Patent
active
059093668
ABSTRACT:
A controller for controlling power transducers to maintain a balanced three-phase output voltage with no influence on current control even when an unbalanced load is connected to a three-phase output of an inverter of the power transducer. The controller provides a stable high-precision three-phase voltage to a load by suppressing higher harmonic voltage components even when a non-linear load is connected. The controller includes a voltage regulator circuit having, for each phase, circuitry calculating a mean value of the output voltage of the inverter. The controller detects and controls deviation in the output voltage from a single-phase mean voltage command. The controller determines a voltage deviation ratio from the deviation and multiplies each output voltage value by the voltage deviation ratio and uses the product as a new voltage detection value.
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"A Matrix Technique Used for Configuring Non-Interference Control System for PWM Inverters". Japan Society for Power Electronics, vol. 14 (pp. 128-137).
Jardieu Derek J.
Mitsubishi Denki & Kabushiki Kaisha
Wong Peter S.
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