- 1、本文档共12页,可阅读全部内容。
- 2、原创力文档(book118)网站文档一经付费(服务费),不意味着购买了该文档的版权,仅供个人/单位学习、研究之用,不得用于商业用途,未经授权,严禁复制、发行、汇编、翻译或者网络传播等,侵权必究。
- 3、本站所有内容均由合作方或网友上传,本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺!文档内容仅供研究参考,付费前请自行鉴别。如您付费,意味着您自己接受本站规则且自行承担风险,本站不退款、不进行额外附加服务;查看《如何避免下载的几个坑》。如果您已付费下载过本站文档,您可以点击 这里二次下载。
- 4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等,请点击“版权申诉”(推荐),也可以打举报电话:400-050-0827(电话支持时间:9:00-18:30)。
- 5、该文档为VIP文档,如果想要下载,成为VIP会员后,下载免费。
- 6、成为VIP后,下载本文档将扣除1次下载权益。下载后,不支持退款、换文档。如有疑问请联系我们。
- 7、成为VIP后,您将拥有八大权益,权益包括:VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
- 8、VIP文档为合作方或网友上传,每下载1次, 网站将根据用户上传文档的质量评分、类型等,对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档
查看更多
httpPPTSWorld.blogspot.comDIRECTCURRENT.doc
DIRECT CURRENT MACHINES
ABSTRACT:
D.C.machine is a highly versatile energy conversion device. It can meet the demand of loads requiring high starting torques, high accelerating and decelerating torques d.c.machine is easily adaptable for drives requiring wide-range speed controls and quick circuits. In d.c machines, the field poles are on the stator called yoke .Armature windings and commutator are on the rotor .brushes are pressed on the commutator surface to collect current from commutator
These machines are classified into two categories i.e . Generators and motors
Generators are mainly used to convert mechanical energy into electrical energy
Motors are used to convert electrical energy. to mechanical.
Generators are classified into many types depending upon their excitations
they are self separately exited .Again these self exited generators are of three types
1) Series generators
2) Shunt generators
3) Compound generators
There are some losses in generators some of them are listed below
Frictional losses
Iron losses
Field winding losses
Now-a-days these d.c.machines are applied in many aspects.
INTRODUCTION
A d.c,machine is a highly versversatile energy conversion device.In normal dc machines,
stator pole is not laminated,armature core is always laminated to reduce eddy -current losses
d.c.machines used in control systems
These d.c machines mainly consists of two types .i.e generators motors,
In the year1821 Michael faraday invented these machines i.e.generatorsmotors basing on
his laws of magnetic induction
CLASSIFICATION OF D.C.MACHINES:
D.C.machine’s are classified mainly into two types basing on their useful functions
D.C Generators
D.C Motors
D.C.GEN
您可能关注的文档
- GrindstoneScenicByway-UpperValleyEconomicCouncil.PDF
- GrindstoneTheatreThe11O'ClockNumber-Fringe.PDF
- GrinforKids.PDF
- GRINGRoupversusINdividualphysiotherapyfollowing.PDF
- GRINlensrodbasedprobeforendoscopicspectraldomain.PDF
- GrinMagazineSummer2015-DeltaDentalofWisconsin.PDF
- GRINplanarwaveguideconcentratorusedwithasingle.PDF
- GRINREALNATUREBRINGSYOUTHEgfruit.PDF
- GrinSpring2015-LuciaMarUnifiedSchoolDistrict.PDF
- GRINSQvalidationstudy-GRINHowtoletpeoplebe.PDF
- 2024年05月山东交通职业学院招考聘用博士研究生50人笔试历年典型题及考点剖析附带答案含详解.docx
- 2024年05月安徽芜湖市弋江区老年学校(大学)工作人员特设岗位公开招聘2人笔试历年典型题及考点剖析附带答案含详解.docx
- 2024年05月山东东营河口区教育类事业单位招考聘用22人笔试历年典型题及考点剖析附带答案含详解.docx
- 2024年05月山东交通职业学院招考聘用100人笔试历年典型题及考点剖析附带答案含详解.docx
- 2024年05月山东威海职业学院招考聘用高层次人才2人笔试历年典型题及考点剖析附带答案含详解.docx
- 2024年05月安徽石台县事业单位工作人员33人笔试历年典型题及考点剖析附带答案含详解.docx
- 2024年05月山东滨州市博兴县事业单位公开招聘考察笔试历年典型题及考点剖析附带答案含详解.docx
- 2024年05月安徽蚌埠固镇县湖沟镇选聘村级后备干部7人笔试历年典型题及考点剖析附带答案含详解.docx
- 2024年05月山东省安丘市教育和体育局所属事业单位学校公开2024年招考232名工作人员笔试历年典型题及考点剖析附带答案含详解.docx
- 2024年05月山东临沂临港经济开发区工作人员(5人)笔试历年典型题及考点剖析附带答案含详解.docx
文档评论(0)