上来就扣帽子大概是你们红卫兵小将传统吧，哈哈哈
BMW是交流电机，用了slip ring结构也是跟传统的直流机电刷有本质的区别的。视频博主说BMW这种算有刷机就算了，居然真的拿了一个玩具的有刷直流机来类比宝马的电机，这不就是典型的一知半解，乱扯淡么？或者是故意的误导观众，也就不得而知了。
至于你说的船用电动舷外机我还真不了解，轮船有些技术没跟上有可能，但是电车的电动机基本代表了电机领域最先进的design了，是不可能还用有刷直流机的。
随手搜个专利
https://patentimages.storage.googleapis.com/d9/67/24/c6e8285c09fd64/US8575807.pdf
greverbal 发表于 2023-09-22 09:09
继续打脸！
你 再google 搜 “ bmw edrive i3 brush motor ” 看看怎么回事
下面是第一个结果： eDrive Electric Motors
BMW''s Fifth-Generation eDrive Electric Motors Explained （这还是篇公关文通稿，来作解释，来做开脱的，但也不敢否认自己是 “有刷电机”）
The i4, iX, and iX3, along with the upcoming i7, all rely on what BMW refers to as fifth-generation eDrive units to move down the road. These eDrive units, more commonly known as electric motors, boast the unique advantage of not requiring any rare-earth metals or magnets in their construction, and instead rely on a brushed design, the origins of which can be traced back over a century. The benefits of eschewing the use of rare-earth metals (which must be mined for their extraction) are obvious, as China controls over 90% of the world''s resources in regard to the materials, like neodymium. However, with nearly every other electric vehicle on the market using brushless motors, and the latest generation of power tools offering previously unrealized capability thanks to brushless technology, one has to wonder what BMW is up to.
Brushed electric motors are typically associated with having a shorter lifespan thanks to the internal brushes generating dust and other debris, and causing wear during operation. In the old days, replacing the brushes in a tool or alternator was a part of the scheduled maintenance, but in the world of EVs and the modern automobile, such expensive servicing and downtime is considered unacceptable. To overcome these obstacles, BMW is making use of cutting-edge sealant technology to extend the lifespan of its brushed motors by encapsulating them in an enclosure which eliminates dust contamination inside the stator and wiring from the brushes making contact with the commutator.
https://bimmerlife.com/2022/04/23/bmws-fifth-generation-edrive-electric-motors-explained/
回复 20楼的帖子
就是想做电动车，一时拿不出东西。
那混动能用的直接做电动车。
怎么理解？就是给凯美瑞hybrid，加了个大电池，然后卸掉发动机。为了不让人跑远门，再把车变小，让人觉得就是买菜车
技术还不如中国老头乐，人家还是正儿八经的电动车
minqidev 发表于 2023-09-22 09:46
所以，说，日系德系的传统油车和老式混动，在改成新式的插电混动模式时，都是凑合凑合的。
没有重新设计整体结构，以及B柱的加强，且电池形状也不是完全平板状，而是，不得不古古怪怪的，对于散热很不好，会降低那些较厚位置电池芯的寿命，也难以保障受撞击时的安全性。
回复 20楼的帖子
就是想做电动车，一时拿不出东西。
那混动能用的直接做电动车。
怎么理解？就是给凯美瑞hybrid，加了个大电池，然后卸掉发动机。为了不让人跑远门，再把车变小，让人觉得就是买菜车
技术还不如中国老头乐，人家还是正儿八经的电动车
minqidev 发表于 2023-09-22 09:46
混动用电机和纯电车电机设计不会有什么本质区别。100kW以上这个level 永磁同步机基本上已经在电车里统一天下。不为别的，就是体积小效率高。
最近其他方案多起来无非是防止使用稀土永磁材料而已。
说技术不如老头乐，这就纯搞笑了。中国要是这种心态永远无法领先世界。
继续打脸！
你 再google 搜 “ bmw edrive i3 brush motor ” 看看怎么回事
下面是第一个结果： eDrive Electric Motors
BMW''s Fifth-Generation eDrive Electric Motors Explained （这还是篇公关文通稿，来作解释，来做开脱的，但也不敢否认自己是 “有刷电机”）
The i4, iX, and iX3, along with the upcoming i7, all rely on what BMW refers to as fifth-generation eDrive units to move down the road. These eDrive units, more commonly known as electric motors, boast the unique advantage of not requiring any rare-earth metals or magnets in their construction, and instead rely on a brushed design, the origins of which can be traced back over a century. The benefits of eschewing the use of rare-earth metals (which must be mined for their extraction) are obvious, as China controls over 90% of the world''s resources in regard to the materials, like neodymium. However, with nearly every other electric vehicle on the market using brushless motors, and the latest generation of power tools offering previously unrealized capability thanks to brushless technology, one has to wonder what BMW is up to.
Brushed electric motors are typically associated with having a shorter lifespan thanks to the internal brushes generating dust and other debris, and causing wear during operation. In the old days, replacing the brushes in a tool or alternator was a part of the scheduled maintenance, but in the world of EVs and the modern automobile, such expensive servicing and downtime is considered unacceptable. To overcome these obstacles, BMW is making use of cutting-edge sealant technology to extend the lifespan of its brushed motors by encapsulating them in an enclosure which eliminates dust contamination inside the stator and wiring from the brushes making contact with the commutator.
https://bimmerlife.com/2022/04/23/bmws-fifth-generation-edrive-electric-motors-explained/
B777 发表于 2023-09-22 09:48
嗯，你也就配看看这种公关文吧。
我指出的很清楚，宝马这是交流电机，跟传统有刷直流机有本质区别。
此“刷”非彼“刷”明白么？单单指出宝马这种slip ring设计有可靠性问题，这没啥。类比玩具直流机的电刷这就属于纯傻x了。给你贴了专利你也看不懂。
还是那句话，在高科技领域，汉字的翻译局限性会导致本质上的误解，这也是为什么汉字锁死了中国高科技上限的原因。两千年以来，凭着中国人的聪明材才智为什么没有产生现代数学，物理，化学，本质上还是汉字限制了想象力。汉字在创立抽象概念方面有天然困难，更不用说辨识汉字以及联系发言带来的额外认知负担了。
可惜这认知负担玩意验证做实验只能用小鼠，中国倒是可以养猴子。
打压是必然的，等你花了很多钱进来了，再打压你，进退两难，撤吧很多sunk cost就浪费了，不撤吧各种受气。只要别的地也能赚到钱，犯不着着急来美国市场，尽管我个人是很希望他们能来的，我也想买一辆国产车开开。
wyzds 发表于 2023-09-21 21:42
华为进入美国各家电信公司合约机之前几天被禁售，前期钱都白花了。
嗯，你也就配看看这种公关文吧。
我指出的很清楚，宝马这是交流电机，跟传统有刷直流机有本质区别。
此“刷”非彼“刷”明白么？单单指出宝马这种slip ring设计有可靠性问题，这没啥。类比玩具直流机的电刷这就属于纯傻x了。给你贴了专利你也看不懂。
还是那句话，在高科技领域，汉字的翻译局限性会导致本质上的误解，这也是为什么汉字锁死了中国高科技上限的原因。两千年以来，凭着中国人的聪明材才智为什么没有产生现代数学，物理，化学，本质上还是汉字限制了想象力。汉字在创立抽象概念方面有天然困难，更不用说辨识汉字以及联系发言带来的额外认知负担了。
可惜这认知负担玩意验证做实验只能用小鼠，中国倒是可以养猴子。
greverbal 发表于 2023-09-22 10:48
看来，你是装作没看到 第 20 层的 “电机拆开后的实拍图，实拍有碳粉，也有碳刷”“在路上抛锚，提示传动系统故障”“有车主更换下来的驱动电机的滑环碳刷，可以看出黑色的碳刷粉末还是不少的”“正反两面各有三个碳刷”，以及那几张转载的实拍小图片！
扯什么高级，扯什么不一样，结果，还是一样的 往下掉碳刷粉末，一样的路上抛锚故障。
国产车真的进步很多，现在就是地缘政治问题困扰。如果byd等进入美国，那各位大概率能买到更便宜的特斯拉了，多的不说，5000的便宜能占到了。
isUNsHine 发表于 2023-09-21 21:44
近几年，日系燃油车的品质也在大退步，例如，减薄发动机和变速箱的腔壁，不思上进在各种看不到的地方减配，反正消费者关心的长期使用，也得几年后才会暴雷才会骂，当前能压榨利润就好。
上来就扣帽子大概是你们红卫兵小将传统吧，哈哈哈
BMW是交流电机，用了slip ring结构也是跟传统的直流机电刷有本质的区别的。视频博主说BMW这种算有刷机就算了，居然真的拿了一个玩具的有刷直流机来类比宝马的电机，这不就是典型的一知半解，乱扯淡么？或者是故意的误导观众，也就不得而知了。
至于你说的船用电动舷外机我还真不了解，轮船有些技术没跟上有可能，但是电车的电动机基本代表了电机领域最先进的design了，是不可能还用有刷直流机的。
随手搜个专利
https://patentimages.storage.googleapis.com/d9/67/24/c6e8285c09fd64/US8575807.pdf
greverbal 发表于 2023-09-22 09:09
谁跟你交流直流，我就问你有没有碳刷连接定子跟动子
有这个刷子，那就叫有刷电机
到底了
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