电机效率更高是个好事——任何设计工程师都不可能说：“下一次设计中，我要找到真正低效率电机”。我在今年夏天写过一篇文章designingwithenergy-efficientpermanentmagnetmotors，介绍洗衣机成为控制电子卖主和电机厂商使用的成熟应用，如何在家庭中广泛使用。然而，大多数人买洗衣机不是因为它们的能源效率，而是出于能够将衣服洗干净。根据消费者报道，许多新型洗衣机在洗衣效果上很差。根据消费者报道，“2007年1月，美国能源
电机效率更高是个好事——任何设计工程师都不可能说：“下一次设计中，我要找到真正低效率电机”。我在今年夏天写过一篇文章designing with energy-efficient permanent magnet motors，介绍洗衣机成为控制
电子卖主和电机厂商使用的成熟应用，如何在家庭中广泛使用。然而，大多数人买洗衣机不是因为它们的能源效率，而是出于能够将衣服洗干净。根据消费者报道，许多新型洗衣机在洗衣效果上很差。
根据消费者报道，“2007年1月，美国能源部要求洗衣机降低21%的能耗，这是我们诚恳支持的目标”。但是测试发现，常见中心加速激励的顶部装载型洗衣机洗涤需要一段难熬的时间，没有浪费的清洗能力，成为购买洗衣机的主要原因。
幸亏，新型前端装载洗衣机普遍使用永磁电机，符合能量效率标准，完成洗衣工作时也不会毁坏。不幸的是，洗衣/干洗设备要花费接近$1000的价格。大多数消费者出于熟悉和价格低廉的原因，似乎更喜欢顶部装载型。但是顶部装载型在获得能量效率的同时，放弃了清洗能力，大多数消费者很可能仍选择更廉价、效率低的顶部装载型。
记得许多州对存水马桶提出要求是在30年前吗？但可笑的是，理论上节省水，但与目标相悖，实际上浪费的更多。如果不得不洗反复洗衣服，洗衣机真的有能源效率吗？
好吧，原因是便宜。我希望存水马桶的类推是正确的，因为在铅工业设计者证明其正确不是太久的事情。今天的存水马桶和水龙头使用的还不错。但是这是一个暗示：也许想要拖延几年再购买顶部装载型洗衣机。
英文原文：
W
ashing machine motor efficiency and the Law of Unintended C
onsequences
Higher motor efficiency is a Good Thing – It’s unlikely that any design engineer ever said, “
Gee, if only I could find a really inefficient motor for my next design.” When I was working on an article this summer on designing with energy-efficient permanent magnet motors and how their use is expanding in home appliances, washing machines were the poster-child application that all control electronics vendors and motor manufacturers used. However, most people buy washing machines not because they are energy-efficient, but because they want to get their clothes clean, and according to Consumer Reports, many of the new washing machines are pretty poor at cleaning clothes.
According to Consumer Reports, “As of January [2007], the U.S. Department of Energy has required washers to use 21 percent less energy, a goal we wholeheartedly support. But our tests have found that traditional top-loaders, those with the familiar center-post agitators, are having a tough time wringing
outthose savings without sacrificing cleaning ability, the main reason you buy a washer.”
Happily, the new front-loading washers, which universally use permanent magnet motors, meet the energy efficiency standards and do a good job of cleaning clothes without destroying them. Unhappily, they cost in the neighborhood of $1000 for a washer/dryer
set. And most consumers seem to prefer top-loaders, both out of familiarity and because they’re less expensive. But the top-loaders gave up cleaning ability when they gained energy efficiency, and most consumers will probably stay with the less expensive, less effective top-loaders.
