A transformer (2) steps down an input AC power, and supplies the AC power to a converter (3). The primary voltage of the transformer (2) detected by a voltage detector (8) is supplied to a converter controller (4) and a frequency detector (6) via a BPF (5). The converter controller (4) controls the converter (3) such that a power factor is equal to or greater than a predetermined value based on the primary voltage, and the converter (3) converts the AC power into DC power. The frequency detector (6) detects the frequency of the primary voltage based on an interval between time points at which the primary voltage via the BPF (5) exceeds a threshold. A filter adjuster (7) calculates a filter characteristic with the detected frequency as a center frequency of the BPF (5), and adjusts the BPF (5) based on the filter characteristic.
POWER CONVERSION DEVICE AND POWER CONVERSION METHOD
STROMWANDLERVORRICHTUNG UND STROMUMWANDLUNGSVERFAHREN
DISPOSITIF DE CONVERSION DE PUISSANCE ET PROCÉDÉ DE CONVERSION DE PUISSANCE
2017-08-23
Patent
Electronic Resource
English
IPC: | H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES |
Power conversion device, power conversion system, and power conversion method
European Patent Office | 2018
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