The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 2024
Filed:
Mar. 22, 2023
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Hiroyuki Takatsuji, Nagaokakyo, JP;
Tatsuya Hosotani, Nagaokakyo, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A switching power-supply unit includes a power conversion circuit, a control circuit, a common-mode choke coil, and half-bridge capacitors. The common-mode choke coil is connected to the control circuit on its side of a direct-current power supply. The half-bridge capacitor is connected to the power conversion circuit on its side of a direct-current power supply, and is connected to the control circuit on its side of the direct-current power supply. A midway point of the half-bridge capacitor is electrically connected to a midway point of the half-bridge capacitor. A noise balancing circuit is configured as a closed circuit including the power conversion circuit, the control circuit, the half-bridge capacitors, and the common-mode choke coil, and causes common-mode currents to be confined and canceled out each other. The common-mode currents are switching noise generated in multiple parts of the closed circuit due to a switching operation of power-conversion switching devices.