gezgin
Posts: 18
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Ya benim bi projem var ama denemek imkanı olmadı.okulda hoca bi olay anlatmışdı, ordan esinlemiştim. labaratuvarda öğrencinin biri seri dc motor çalışırken, uyarma akımını kesince motor birden hızlanmaya başlamış, hız sürekli artıp nerdeyse paramparça olup dağıtacak herşeyi..neyse hoca hızlı hareket edip şalteri kapatmış, ve motoru durdurabilirmiş. Bu yöntemle dc motorun uyarma akımını elektronik olarak kontrol edip, enerji üretmek..hızını kontrol etmek.. aslında teoroik olarak sonuz enerji gibi duruyor. tek sorun sürtünme vb. ve fırçalar..fırçasız yapılabilirse.. This type of motor develops a very large amount of turning force, called torque, from a standstill. Because of this characteristic, the series dc motor can be used to operate small electric appliances, portable electric tools, cranes, winches, hoists, and the like. Another characteristic is that the speed varies widely between no-load and full-load. Series motors cannot be used where a relatively constant speed is required under conditions of varying load. A major disadvantage of the series motor is related to the speed characteristic mentioned in the last paragraph. The speed of a series motor with no load connected to it increases to the point where the motor may become damaged. Usually, either the bearings are damaged or the windings fly out of the slots in the armature. There is a danger to both equipment and personnel. Some load must ALWAYS be connected to a series motor before you turn it on. This precaution is primarily for large motors. Small motors, such as those used in electric hand drills, have enough internal friction to load themselves.
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