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

Claim 2:
3. The power conversion device according to claim 2, wherein
the steps further include
generating a first function for ensuring the modulation factor and associating a fundamental wave component of an output waveform of the inverter and the modulation factor with each other, with the switching phases used as variables,
generating a second function that is a sum value of harmonic elements for the respective orders determined by the harmonic components for the respective orders of the output waveform of the inverter, with the switching phases used as variables,
generating a third function for prescribing the phase difference between the predetermined adjacent two switching phases, with the two switching phases used as variables,
generating a fourth function for prescribing the difference between the phase width of the switching phase region where the voltage difference between the positive-side capacitor and the negative-side capacitor increases and the phase width of the switching phase region where the voltage difference decreases, with the switching phases used as variables,
setting an evaluation function composed of the first function, the second function, the third function, the fourth function, and one or more additional variables, with the switching phases and the additional variables used as variables, and
calculating the switching pattern by minimizing the evaluation function with respect to the switching phases and the additional variables.