Synchrone Taktverfahren mit Variablen Oberen Grenzen der Schaltfrequenz von Ausgewählten Pulszahlen

Details

Veröffentlichungs-Nr.

EP4800909

Anmeldetag

9. Januar 2026

Veröffentlichung

2. September 2026

Rechtsraum

EP

IPC

H02M7/5395, // H02P27/08

Abstract

A power conversion device includes a circuit that converts DC power into AC power by a pulse width modulation method, and a control device that controls the circuit. A control device executes: processing of controlling the circuit to operate in an asynchronous mode that asynchronously generates a carrier and a modulation wave and a synchronous mode that is used in an output frequency region higher than an output frequency region in the asynchronous mode and in which a carrier pulse number per modulation wave cycle is set from a first order to an n-th order as a multiple of 3 from a high frequency side to a low frequency side; processing of setting an upper limit frequency of a k-th-order (k<n) carrier frequency region to a high frequency side of a common upper limit frequency initially set for each order of the synchronous mode; and processing of setting an upper limit frequency of a (k+1) th-order carrier frequency region to a low frequency side of the common upper limit frequency.

Anmelder

Firma

Hitachi Industrial Equipment Systems Co., Ltd.

Land

🇯🇵 Japan

Fachgebiete