tag:blogger.com,1999:blog-6338993703407602171.post3856680225147709926..comments2024-03-28T23:21:04.213-07:00Comments on Tahmid's blog: Research and Design of Solar ProductsTahmidhttp://www.blogger.com/profile/09117804893438710050noreply@blogger.comBlogger59125tag:blogger.com,1999:blog-6338993703407602171.post-10281877241420363782020-04-17T02:09:57.604-07:002020-04-17T02:09:57.604-07:00Nice one tahmid you are doing wellNice one tahmid you are doing wellEMERITUS-TECHNOLOGYhttps://www.blogger.com/profile/09345055812175868767noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-84239982014922428492019-07-20T08:13:41.958-07:002019-07-20T08:13:41.958-07:00Hi Tahmid,
I was looking for your advice in solvi...Hi Tahmid,<br /><br />I was looking for your advice in solving a very common problem i am facing solar charge controller circuit. I have designed and installed 48V, 30Amp On/Off based solar in many live sites for telecoms. The circuit worked well for most of the installation but in certain instances i am facing problem of MOSFET getting shorted (Drain and Source) which i have not been able to identify the reason. <br /><br />I understand that MOSFET becoming shorted while switching such large current is quite common because i have seen similar MOSFET shorting problem in good controllers like "Morningstar". The biggest problem in my design is that in case MOSFET Drain and source get shorted then it becomes like direct connection from Solar to Battery resulting battery overcharge further causing damage to battery. Is there any way i can enhance my circuit to avoid this situation.<br /><br />I have been looking for answer to this issue for years and have posted my request in many blog but i have not found a concrete answer from any one so far. In fact this is my second request in this blog too. Will you be able to help me?<br /><br />Deepak <br />Deepakhttps://www.blogger.com/profile/08111280040198924535noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-70896230515996720032018-04-24T06:54:40.045-07:002018-04-24T06:54:40.045-07:00Hi Tahmid,
I am posting this request assuming you ...Hi Tahmid,<br />I am posting this request assuming you will be able to help me solving my problem. I have designed Solar charge controller using 555 as a comparator that drives 4xMOSFET (IRF4321) in parallel. The circuit is meant for charging 48V batteries with max charging of 30-40 Amps. The circuit works well in most of installations. However in the situation where the batteries are faulty or bad or deeply worn, i am experiencing many cases of MOSFET burned or shorted. So my questions are:<br /><br />1. What could be the reason of MOSFET going faulty, shorted due to battery fault. My circuit is just comparing the battery voltage to turn on or off the MOSFET. It doesnot monitor other parameters like battery temperature, batttery type (Flooded, AGM, VRLA). FYI my switching circuit is ON/OFF type not PWM.<br /><br />2. In case the MOSFET is shorted then all the power generated by solar goes to battery as there is nothing to control by control circuit. The result in such case is that battery is overcharged and damaged too. Is there any way to avoid this situation such that battery charging is stopped if MOSFET gets shorted?<br /><br />Looking forward for your valuable suggestion please.<br /><br />Regards,<br />Deepak Deepakhttps://www.blogger.com/profile/08111280040198924535noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-50000878584524324692016-03-27T03:44:48.462-07:002016-03-27T03:44:48.462-07:00Hi,
10% of the battery capacity is ideal for maxim...Hi,<br />10% of the battery capacity is ideal for maximum battery life. However can charge upto 20% of battery capacity because we have limited time available from solar system.Anonymoushttps://www.blogger.com/profile/00912355188054786087noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-19848987530452115882015-05-20T04:34:03.452-07:002015-05-20T04:34:03.452-07:00Hey Tahmid ,
I am getting very low value of curre...Hey Tahmid ,<br />I am getting very low value of current ( in micro amp) after the mosfet. Please tell me how to improve it.<br />And its really difficult for me to design ferrite based transformer tell me how to proceed .<br />towardsonedirection@gmail.com <br />its my humble request to all of you please give me appropriate path.<br />Thanks- Gizem <br />Anonymoushttps://www.blogger.com/profile/03901549033667835948noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-68387110104777447312015-02-05T11:13:07.151-08:002015-02-05T11:13:07.151-08:00hi
kindly send me all details if possible
adityap...hi <br />kindly send me all details if possible<br />adityapurwar007@gmail.comAnonymoushttps://www.blogger.com/profile/06342785369956048282noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-56694810838924273262014-01-02T00:31:21.035-08:002014-01-02T00:31:21.035-08:00Hi Tahmid,
Please send me schematic diagram of MP...Hi Tahmid, <br />Please send me schematic diagram of MPPT based charge controller circuit. pooja mehtahttps://www.blogger.com/profile/04221419617592812330noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-35117239005278266622013-12-29T07:12:02.253-08:002013-12-29T07:12:02.253-08:00For just on/off control, you can just drive the MO...For just on/off control, you can just drive the MOSFET on. For PWM or MPPT, you need pulsed drive.<br /><br />Regards,<br />Tahmid.Tahmidhttps://www.blogger.com/profile/09117804893438710050noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-30981394518524753932013-12-29T07:10:49.018-08:002013-12-29T07:10:49.018-08:00You can get one here (not mine): http://archive.si...You can get one here (not mine): http://archive.siliconchip.com.au/cms/A_112794/article.htmlTahmidhttps://www.blogger.com/profile/09117804893438710050noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-81333536857361822222013-12-29T07:10:12.927-08:002013-12-29T07:10:12.927-08:00http://archive.siliconchip.com.au/cms/A_112794/art...http://archive.siliconchip.com.au/cms/A_112794/article.htmlTahmidhttps://www.blogger.com/profile/09117804893438710050noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-87390690450125264162013-12-29T07:09:52.055-08:002013-12-29T07:09:52.055-08:00http://archive.siliconchip.com.au/cms/A_112794/art...http://archive.siliconchip.com.au/cms/A_112794/article.htmlTahmidhttps://www.blogger.com/profile/09117804893438710050noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-72406451363039706782013-12-29T07:08:59.084-08:002013-12-29T07:08:59.084-08:00A simple Google search returns a lot of useful res...A simple Google search returns a lot of useful results.<br /><br />Here's one you can use to get started: http://en.wikipedia.org/wiki/Maximum_power_point_tracking<br /><br />Regards,<br />Tahmid.Tahmidhttps://www.blogger.com/profile/09117804893438710050noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-68326619861489432052013-12-29T07:06:46.764-08:002013-12-29T07:06:46.764-08:00Typically, a buck converter, compared to the input...Typically, a buck converter, compared to the input, reduces the output voltage and increases output current.<br /><br />Regards,<br />Tahmid.Tahmidhttps://www.blogger.com/profile/09117804893438710050noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-12534780840780505072013-12-27T00:33:07.383-08:002013-12-27T00:33:07.383-08:00i am designing the circuit for solar charge contro...i am designing the circuit for solar charge controller using PIC16f676 ,<br />my logic is clear but i doubt the initialization process is wrong thats why i am not getting the desired result .<br />my input output pin are not working as per my requirment , can you provide your email id so that i can send you the file and you can check it there<br />Anonymoushttps://www.blogger.com/profile/00911706077706014008noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-75266968444508863192013-12-25T22:38:51.181-08:002013-12-25T22:38:51.181-08:00Hi Tahmid,
I am new in your blog.
I want to make ...Hi Tahmid, <br />I am new in your blog.<br />I want to make a MPPT based Charge controller plz help me to make this project.<br />Please send me basic concept on my mail id.<br />missmehta1988@gmail.com<br />Anonymoushttps://www.blogger.com/profile/18361722960168349379noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-17914423398638274812013-10-21T06:00:55.895-07:002013-10-21T06:00:55.895-07:00I enjoy the stuff you put in here. Very pertinent ...I enjoy the stuff you put in here. Very pertinent information. Consider yourself book-marked. <a href="http://www.tpc-india.com/company.php" rel="nofollow">solar inverters manufacturers in bangalore</a><br />Anonymoushttps://www.blogger.com/profile/13693535292606702890noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-59217974044246170332013-06-11T23:57:59.141-07:002013-06-11T23:57:59.141-07:00hi thamid ....if the current in was 30 amp ..then ...hi thamid ....if the current in was 30 amp ..then what will be the current out for this above specification buck converter?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-71795032877659779002013-06-07T02:31:07.269-07:002013-06-07T02:31:07.269-07:00hi thamid ..is buck converter will give more outpu...hi thamid ..is buck converter will give more output current than input current?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-89277103706403254712013-05-25T00:35:40.902-07:002013-05-25T00:35:40.902-07:00can you please send me complete circuit and source...can you please send me complete circuit and source code of any charge controller plz<br />sunilraheja24@yahoo.in<br />thank you<br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-5363687981957520522013-04-11T23:12:07.847-07:002013-04-11T23:12:07.847-07:00sir i need a mppt charger conroller circuit for 10...sir i need a mppt charger conroller circuit for 100wAnonymoushttps://www.blogger.com/profile/04432466872568555002noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-20767471319719600552013-03-31T07:37:12.326-07:002013-03-31T07:37:12.326-07:00It depends on your choice of components selection ...It depends on your choice of components selection - the microcontroller you choose, the switching components, drivers, etc. It costs more than linear type on/off controllers, but not too much more if you just want simple MPPT charge controlling without much other "advanced" features.<br /><br />Regards,<br />Tahmid.Tahmidhttps://www.blogger.com/profile/09117804893438710050noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-47288423944214107902013-03-28T08:17:29.009-07:002013-03-28T08:17:29.009-07:00hey tahmid can u tell me how much it costs for MPP...hey tahmid can u tell me how much it costs for MPPT charge controllerMahesh Gadagihttps://www.blogger.com/profile/09636364885120889086noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-42545195330257217032013-02-15T04:22:08.332-08:002013-02-15T04:22:08.332-08:00You need to adjust the feedback in the circuit to ...You need to adjust the feedback in the circuit to slightly increase the voltage. This can usually be done simply by rotating a variable resistor (pot) in the correct way.<br /><br />Increase the voltage to 230VAC and this usually works! Don't increase beyond 230V though - you might damage your fans if the voltage is too high!<br /><br />Regards,<br />Tahmid.Tahmidhttps://www.blogger.com/profile/09117804893438710050noreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-61017741638426123022013-02-14T12:45:18.417-08:002013-02-14T12:45:18.417-08:00Dear Tahmid,
Please send the complete schematic w...Dear Tahmid,<br /><br />Please send the complete schematic with source code of your solar charge controllers & inverter if it possible.<br />Thanks<br /> uzeyirilden@hotmail.comAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-6338993703407602171.post-88159405032487328612013-02-13T10:04:04.471-08:002013-02-13T10:04:04.471-08:00Hi,
I am having 850va inverter ,which gives 220vo...Hi,<br /><br />I am having 850va inverter ,which gives 220volts output.<br />on ups mode my fans are becoming slow.<br />how to increase output voltage?<br /><br />Regards<br />rajeshAnonymoushttps://www.blogger.com/profile/10642822740143898822noreply@blogger.com