Patent ID: 11923759
Assignee: TOSHIBA MITSUBISHI—ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. The power conversion device according to claim 1, wherein
the steps further include calculating, for each number of pulses in a predetermined range, over a predetermined range of modulation factors, switching patterns in advance by performing calculation so as to satisfy conditions for
ensuring the modulation factor,
eliminating the harmonic components for the respective orders of the output voltage of the inverter,
ensuring the predetermined value for the phase difference between the predetermined adjacent two switching phases, and
ensuring that, regarding regions of switching phases where current flows from the inverter to the neutral point in the half cycle of the fundamental wave, a difference between
a phase width of the region where a voltage difference between the positive-side capacitor and the negative-side capacitor increases, and a phase width of the region where the voltage difference decreases, becomes equal to or smaller than a predetermined value,

storing the calculated switching patterns, for each number of pulses in the predetermined range, over the predetermined range of the modulation factors,
reading a switching pattern corresponding to the calculated modulation factor and the determined number of pulses, and generating the gate signal for ON/OFF driving the switching elements on the basis of the read switching pattern.