{"id":10779,"date":"2026-08-29T23:43:16","date_gmt":"2026-08-29T15:43:16","guid":{"rendered":"https:\/\/q8bbzjnpm5.wpdns.site\/?p=10779"},"modified":"2026-08-29T23:43:16","modified_gmt":"2026-08-29T15:43:16","slug":"new-amorphous-alloy-dry-type-transformer-debuts-propelling-the-transformation-of-the-power-industry","status":"publish","type":"post","link":"https:\/\/subian-electric.com\/ja\/news\/new-amorphous-alloy-dry-type-transformer-debuts-propelling-the-transformation-of-the-power-industry\/","title":{"rendered":"\u65b0\u3057\u3044\u30a2\u30e2\u30eb\u30d5\u30a1\u30b9\u5408\u91d1\u4e7e\u5f0f\u30c8\u30e9\u30f3\u30b9\u304c\u767b\u5834\u3057\u3001\u96fb\u529b\u696d\u754c\u306e\u5909\u9769\u3092\u63a8\u9032\u3057\u307e\u3059"},"content":{"rendered":"

On a hot summer afternoon, an energy auditor equipped with a handheld power quality checker was walking through a textiles factory in southern Vietnam. The 1,000 kVA distribution transformer at the factory had been running at a load of only about 35 percent for almost the entire day – weekend shifts, part-time production lines, and air conditioning usage only on hot afternoons. The readings on the power logger showed what the owner of the factory had thought – the transformer consumed a larger quantity of energy being kept in the activated state than it was supplying to the machines. The reason for the problem was no-load losses – a sneak thief. The very essence of the problem is that new amorphous alloy transformers were created specifically to prevent it.<\/p>\n

The invention of the amorphous alloy, dry transformer is a considerable shift in efficiency perception by the power industry, not in terms of a few clicks here and there, but in terms of a drop in the no-load losses for 60-80 percent compared to traditional silicon steel cores. This paper explains what amorphous alloy transformers are, how they work, how they function in reality, and what the numbers mean for customers.<\/p>\n

Brief explanation: The amorphous alloy dry transformer utilizes the same design of fireproof cast resin or VPI transformer of dry type, but the core of the transformer is made of amorphous alloy instead of silicon steel. Because of the absence of grains in the alloy, it becomes easier to magnetize the transformer and as a result, the no-load loss is reduced by 60 to 80%.<\/p><\/blockquote>\n

\"New<\/p>\n

\n

What Is an Amorphous Alloy Transformer?<\/h2>\n

An amorphous metal transformer is defined as a transformer utilizing a core made from amorphous metal, which is blended from iron, boron and silicon, cooled rapidly from molten state, about 1 million \u00b0C per second, rendering it cool without forming crystalline structure. The result is obtained in the form of very thin pieces of ribbon, the thickness being generally 0.02-0.03mm, with randomly arranged atoms. The importance of randomness of core is that because there are no grains to interrupt the magnetic field, the core loses less energy from hysteresis during each magnetization cycle.<\/p>\n

In case of a dry-type transformer, this low-loss core is combined with either air or resin cooling system, allowing to obtain a safe and highly efficient unit in light load operation. However, historically, the main disadvantage of this type of metal was purely mechanical; amorphous metal ribbons have proven to be more complicated in handling than steel plates as they are brittle and more susceptible to stress. However, modern production, use of step-lap cores and careful fixing of parts have resolved the issues; therefore, the technology has progressed from pilot projects into actual practical use.<\/p>\n

Why the Core Material Changes Everything<\/h2>\n

No-load losses are the energy used by the transformer to keep the core magnetized and are of course constant throughout the day and night over the weekends and holidays also. Silicon-steel cores require extensive magnetization and need much stronger magnetic fields to reverse the magnetic domains during each half cycle of alternating current, while amorphous cores require much less energy for the magnetization process. For example, when looking at a distribution transformer rated at 1000 kVA:<\/p>\n\n\n\n\n\n\n\n
\u30b3\u30a2\u6750\u6599<\/th>\nRibbon Thickness<\/th>\nNo-Load Loss (1,000 kVA)<\/th>\nRelative Loss<\/th>\n<\/tr>\n<\/thead>\n
Grain-oriented silicon steel (CRGO)<\/td>\n0.23\u20130.30 mm<\/td>\n2,000\u20132,600 W<\/td>\n100% baseline<\/td>\n<\/tr>\n
High-grade CRGO (thin gauge)<\/td>\n0.18\u20130.23 mm<\/td>\n1,500\u20132,000 W<\/td>\n~75\u201385%<\/td>\n<\/tr>\n
Amorphous alloy (2605SA1)<\/td>\n0.02\u20130.03 mm<\/td>\n800\u20131,100 W<\/td>\n~35\u201345%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The maximum possible improvement to be gained by customers of transformers today is realized in connection with no-load losses, which can be reduced by 60\u201380%.<\/p>\n

\"How<\/p>\n

How the New Dry-Type Design Is Built<\/h2>\n

The manufacturing process of an amorphous alloy dry-type transformer takes place in six major stages. There is no need to go deep into understanding the construction and the principles of how they work to see that those units are more expensive than other types of transformers and that they function differently:<\/p>\n