POWER SUPPLY BOARD, POWER SUPPLY UNIT AND REFRIGERATOR

• Main Authors: HIRAOKA NOBUYASU, FUJIWARA MASAHIDE, KODERA YOSHIHITO, ISHIZEKI SHINICHI
• Format: Patent
• Language: English; Japanese
• Published: 20.09.2018
• Subjects: AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING; 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; BLASTING; COMBINED HEATING AND REFRIGERATION SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; HEAT PUMP SYSTEMS; HEATING; LIGHTING; LIQUEFACTION SOLIDIFICATION OF GASES; MANUFACTURE OR STORAGE OF ICE; MECHANICAL ENGINEERING; RANGES; REFRIGERATION MACHINES, PLANTS OR SYSTEMS; REFRIGERATION OR COOLING; VENTILATING; WEAPONS

PROBLEM TO BE SOLVED: To miniaturize as much as possible a printed circuit board without much reducing a reduction effect of common mode noise.SOLUTION: A power supply board (20) includes a first power generation circuit (24) for generating first output power of three-phase on the basis of input AC power supplied from a three-phase four-wire AC power supply (91) and a second power generation circuit (25) for generating second output power of single-phase. Further, the power supply board (20) includes: a three-wire first common mode choke coil (27) connected to three-phase wires (31r, 31s, 31t) between an input terminal (21) and the first power generation circuit (24); and a two-wire second common mode choke coil (28) connected to a predetermined wire (31s) and a neutral point wire (31n) between the input terminal (21) and the second power generation circuit (25).SELECTED DRAWING: Figure 2 【課題】コモンモードノイズの低減効果をさほど落とすことなく、プリント基板をできるだけ小型化する。【解決手段】電源基板（20）は、３相４線式の交流電源（91）からの入力交流電力に基づいて３相の第１出力電力を生成する第１電力生成回路（24）と単相の第２出力電力を生成する第２電力生成回路（25）とを備える。更に電源基板（20）は、入力端子（21）と第１電力生成回路（24）との間において３相配線（31r,31s,31t）に接続された３線式の第１コモンモードチョークコイル（27）と、入力端子（21）と第２電力生成回路（25）との間において所定配線（31s）及び中性点配線（31n）に接続された２線式の第２コモンモードチョークコイル（28）とを備える。【選択図】図２