Abstract: A multiple PWM cycloconverter or matrix converter uses reactors to connect various phase output terminals in parallel.

Abstract: A multiple PWM cycloconverter or matrix converter uses reactors to connect various phase output terminals in parallel.

Abstract: The controller for a power converter of the present invention:calculates the range number in which the voltage command vector for a multi-level converter is present;rotates the voltage command vector through a specified angle;performs coordinate transformation of that vector to a vector in an oblique coordinate system which takes the vector in the a axis direction and a vector which has been rotated through a specified angle anti-clockwise from the a axis as two unit vectors;splits the converter output-enabled portion of the vector diagram of the -30 degrees +30 degrees range of the spatial vector diagram in which output vector is positioned, which has undergone oblique coordinate transformation, into square-shape patterns so that the outputs vector is positioned in the upper left/the lower right/both the lower left and upper right of each square-shape pattern;splits any square-shape pattern which holds the output vector in both its lower left and its upper right into two triangular domains by a segment which

Abstract: In a control apparatus for a power converter for controlling a power converter on the basis of stored values of a memory adapted to store variables over a fixed time period of the power converter while sequentially updating them, when an abnormal state occurs in the power converter, writing into the memory is stopped to effect a control using data having been stored immediately before that abnormal state occurs, thus to restart writing into the memory at the time when that abnormal state is removed.