ENCLOSURE AND ELECTRIC DEVICE

• Main Authors: HAKODA SATOSHI, SAKATA KAZUKI
• Format: Patent
• Language: English; Japanese
• Published: 18.10.2022
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PRINTED CIRCUITS

To provide an enclosure and an electric device capable of suppressing noise generated from the enclosure itself.SOLUTION: A housing 50 for holding an electric circuit portion that performs pulse width modulation control inside includes a body portion 201 and a plurality of convex portions 202. A plurality of convex portions 202 are formed on the surface of the body portion 201. Intervals P1 and P2 between a pair of adjacent convex portions 202 in the plurality of convex portions 202 are less than 0.5 times the wavelength λ1 of the sound wave having the same frequency as the carrier frequency in pulse width modulation control.SELECTED DRAWING: Figure 7 【課題】筐体自体から発生する騒音を抑制する事が可能な筐体および電気機器を提供する。【解決手段】筐体５０は、パルス幅変調制御を行う電気回路部を内部に保持するための筐体５０であって、本体部２０１と、複数の凸部２０２とを備える。複数の凸部２０２は、本体部２０１の表面に形成されている。複数の凸部２０２において隣接する１組の凸部２０２の間隔Ｐ１、Ｐ２は、パルス幅変調制御におけるキャリア周波数と同じ周波数を有する音波の波長λ１の０．５倍未満である。【選択図】図７