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Thyristor convertor type AVR(Automatic Voltage Regulator) is made of Thyristors(Silicon Controlled Rectifiers,SCRs). We know that output DC voltage from an SCR will not only depend upon the r.m.s. value of Input voltage applied, but also at the angle at which the input AC cycle is fired (using gate signal). If the firing angle is zero(in a simple circuit), then maximum DC output voltage will be obtained.If the firing angle is changed from 0 to 180,then maximum to minimum voltage is obtained. This property could be used to build an AVR. The firing angle proportional to Output voltage could be used to trigger the thyristor,in a closed loop manner and a nearly constant DC voltage(Average Value) can be obtained.An invertor circuitory could be utilised to get a regulated AC supply. Many other configurations can be build from thyristors to get a regulated AC supply.
Why is tetra-ethyl lead added to gasoline?
hi i want to know about examination of deputy field officer under cabinet secretary. when is it started. how many stage are completed to reached the interview board. actually i am b. com graduate. i send my application to the address of AD(Pers-A), post box no 3003 lodhi road post office new delhi-110003. i don't know about AD(Pers-A). but i write this word on the envelope which was send to the post office. is it correct addressed. have a any chanced to can celled my application. what type of question i have to faced in the written examination. can u give me any sample paper of this examination. thanks
i need some list of names in handicapped acheivers. where can i found? if anyone know please mail me janarthanan25@yahoo.co.in i need 5 persons of names in disabled acheivers. it is very urgent. please help me
Why are you applying to this particular teaching course?
Which classroom management structure would you prefer if we hire you?
Why do you want to teach?
What is Aggressive behavior needed in corporate world? how aggressive play a role on of the Employee?
What are some of the most successful strategies or techniques that have worked for you in the classroom?
Would you be able to manage/discipline a group of 35 pupils?
is there any jobs for 15 year olds?
HI FRIENDS, I AM RAJABALAN, HOW TO FILL THE BIO-DATA FORM IN SBI INTERVIEW LETTER?????
how will be the career growth in railways if we join as a asst. station master?
Pls send me the sbi bank recruitment question papers from last 5 years