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(Spreading o&hellip;","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":13388,"like_count":0,"has_summary":false,"last_poster_username":"santhosh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":2,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"Types of Thyristor Protection","id":2024,"title":"Types of Thyristor Protection","slug":"types-of-thyristor-protection","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T18:59:06.857Z","last_posted_at":"2018-01-19T18:59:06.983Z","bumped":true,"bumped_at":"2018-01-19T18:59:06.983Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"For  reliable operation of SCR, it should be operated within the specific ratings. \nSCRs are very delicate devices and so they must be protected against abnormal operating conditions. \nVarious protection of SCR are \n\ndi/&hellip;","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":1112,"like_count":0,"has_summary":false,"last_poster_username":"santhosh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":2,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"Why is pulse triggering preferred over RC triggering?","id":1892,"title":"Why is pulse triggering preferred over RC triggering?","slug":"why-is-pulse-triggering-preferred-over-rc-triggering","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T17:39:14.120Z","last_posted_at":"2018-01-19T17:39:14.222Z","bumped":true,"bumped_at":"2018-01-19T17:39:14.222Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"Pulse triggering is preferred higher than RC triggering because of its following advantages: \n\nThe SCR has small turn ON time ie, upto 5uS. 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Hence it is difficult to design exact filters\nThe control circuit becomes complex, since frequency is not fixed","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":1689,"like_count":0,"has_summary":false,"last_poster_username":"santhosh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":2,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"What is PWM? List its various techniques","id":1888,"title":"What is PWM? 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\n\nProvides inverted output\nBoth buck/boost operations achieved simultaneously\nHigh efficiency\nShort circuit protection can be easily implemented\n\nDisadvantages \n\nOutput voltage polarity opposite to that of inp&hellip;","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":5989,"like_count":0,"has_summary":false,"last_poster_username":"santhosh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":2,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"What is full converter? 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What is dual converter?","slug":"what-is-full-converter-what-is-dual-converter","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T17:31:17.926Z","last_posted_at":"2018-01-19T17:31:18.026Z","bumped":true,"bumped_at":"2018-01-19T17:31:18.026Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"Full converter: \nWhen positive as well as negative half cycles of the supply are rectified, it is called full converter. \nDual converter: \nWhen the polarities of output voltage as well as current can be reversed then it &hellip;","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":724,"like_count":0,"has_summary":false,"last_poster_username":"santhosh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":2,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"What are the control strategies of chopper?","id":1831,"title":"What are the control strategies of chopper?","slug":"what-are-the-control-strategies-of-chopper","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T09:49:58.397Z","last_posted_at":"2018-01-19T09:49:58.482Z","bumped":true,"bumped_at":"2018-01-19T09:49:58.482Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"The control strategies of chopper are \n\nPulse width modulation PWM (Variable TON, Constant frequency)\nFrequency modulation (Constant TON or TOFF, Variable frequency)\nCurrent Limit Control (CLC)","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":9738,"like_count":1,"has_summary":false,"last_poster_username":"vignesh","category_id":40,"op_like_count":1,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":18,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"For Selecting MOSFET, what are the major parameters we have to consider in the datasheet?","id":1830,"title":"For Selecting MOSFET, what are the major parameters we have to consider in the datasheet?","slug":"for-selecting-mosfet-what-are-the-major-parameters-we-have-to-consider-in-the-datasheet","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T09:49:38.004Z","last_posted_at":"2018-01-19T09:49:38.092Z","bumped":true,"bumped_at":"2018-01-19T09:49:38.092Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"In MOSFET datasheet, we have to focus on following parameters: \n\nDrain to Source Voltage VDSS\nOn state Drain to Source Resistance RDS(ON)\nReverse Recovery Current IRR\nReverse Recovery Charge QRR\nGate Charge QG\nBody Diode&hellip;","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":1268,"like_count":0,"has_summary":false,"last_poster_username":"vignesh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":18,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"What are the various parameters we have to consider, while selecting IGBT?","id":1829,"title":"What are the various parameters we have to consider, while selecting IGBT?","slug":"what-are-the-various-parameters-we-have-to-consider-while-selecting-igbt","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T09:49:21.368Z","last_posted_at":"2018-01-19T09:49:21.444Z","bumped":true,"bumped_at":"2018-01-19T09:49:21.444Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"In IGBT datasheet, we have to focus on following parameters \n\nCollector to emitter voltage VCES\nCollector Current IC\nCollector Dissipation PC\nJunction Temperature Tj","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":1059,"like_count":0,"has_summary":false,"last_poster_username":"vignesh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":18,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"For High frequency applications will you prefer MOSFET or IGBT?  Why?","id":1828,"title":"For High frequency applications will you prefer MOSFET or IGBT?  Why?","slug":"for-high-frequency-applications-will-you-prefer-mosfet-or-igbt-why","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T09:48:50.377Z","last_posted_at":"2018-01-19T09:48:50.489Z","bumped":true,"bumped_at":"2018-01-19T09:48:50.489Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"For High frequency applications, MOSFET is the right choice of the device.\nBecause MOSFET has low switching losses compare to that of IGBT.\nGeneral rule of thumb is for low-frequency applications having frequency range &hellip;","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":1441,"like_count":0,"has_summary":false,"last_poster_username":"vignesh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":18,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"For High voltage applications will you prefer MOSFET or IGBT?","id":1827,"title":"For High voltage applications will you prefer MOSFET or IGBT?","slug":"for-high-voltage-applications-will-you-prefer-mosfet-or-igbt","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T09:48:34.174Z","last_posted_at":"2018-01-19T09:48:34.282Z","bumped":true,"bumped_at":"2018-01-19T09:48:34.282Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"For High voltage applications we have to use IGBT.\nBecause MOSFETs are low voltage devices. ie, Their voltage rating is lesser than IGBT.\nGeneral rule is MOSFETs are suitable for applications which has breakdown voltage&hellip;","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":1171,"like_count":0,"has_summary":false,"last_poster_username":"vignesh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":18,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"What is duty-cycle?","id":1293,"title":"What is duty-cycle?","slug":"what-is-duty-cycle","posts_count":2,"reply_count":0,"highest_post_number":2,"image_url":null,"created_at":"2018-01-19T04:46:57.611Z","last_posted_at":"2018-01-19T09:47:25.143Z","bumped":true,"bumped_at":"2018-01-19T09:47:25.143Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"Duty cycle is defined as the ratio of the on time of the chopper to the total time period of the chopper. It is denoted by α.","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":1165,"like_count":0,"has_summary":false,"last_poster_username":"vignesh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":18,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"Name some of the current controlled (current driven) devices","id":1824,"title":"Name some of the current controlled (current driven) devices","slug":"name-some-of-the-current-controlled-current-driven-devices","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T09:47:03.322Z","last_posted_at":"2018-01-19T09:47:03.402Z","bumped":true,"bumped_at":"2018-01-19T09:47:03.402Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"current controlled (current driven) devices \n\nSCR,\nGTO,\nGTR","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":1631,"like_count":0,"has_summary":false,"last_poster_username":"vignesh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":18,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"What is meant by SOA?","id":1823,"title":"What is meant by SOA?","slug":"what-is-meant-by-soa","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T09:46:31.393Z","last_posted_at":"2018-01-19T09:46:31.470Z","bumped":true,"bumped_at":"2018-01-19T09:46:31.470Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"SOA – Safe Operating Area determines the voltage and current boundary within which the Power Device can be operated without destructive failure.","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":706,"like_count":0,"has_summary":false,"last_poster_username":"vignesh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":18,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"What is firing angle?","id":1822,"title":"What is firing angle?","slug":"what-is-firing-angle","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T09:46:17.241Z","last_posted_at":"2018-01-19T09:46:17.320Z","bumped":true,"bumped_at":"2018-01-19T09:46:17.320Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"The angle between the zero crossing of the input voltage and the instant the SCR is fired is called as delay angle or firing angle.","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":1555,"like_count":0,"has_summary":false,"last_poster_username":"vignesh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":18,"primary_group_id":null,"flair_group_id":null}]},{"fancy_title":"What is hard switching of the thyristor?","id":1821,"title":"What is hard switching of the thyristor?","slug":"what-is-hard-switching-of-the-thyristor","posts_count":1,"reply_count":0,"highest_post_number":1,"image_url":null,"created_at":"2018-01-19T09:46:01.518Z","last_posted_at":"2018-01-19T09:46:01.589Z","bumped":true,"bumped_at":"2018-01-19T09:46:01.589Z","archetype":"regular","unseen":false,"pinned":false,"unpinned":null,"excerpt":"When gate current is several times higher than the required gate current, the SCR is said to be hard fired. It reduces the turn ON time and enhances the di/dt capability.","visible":true,"closed":false,"archived":false,"bookmarked":null,"liked":null,"tags":[],"tags_descriptions":{},"views":1728,"like_count":0,"has_summary":false,"last_poster_username":"vignesh","category_id":40,"op_like_count":0,"pinned_globally":false,"featured_link":null,"is_hot":false,"has_accepted_answer":false,"can_vote":false,"posters":[{"extras":"latest single","description":"Original Poster, Most Recent Poster","user_id":18,"primary_group_id":null,"flair_group_id":null}]}]}}