Home
Forums
New posts
Search forums
What's new
New posts
Latest activity
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Home
Forums
All Topics
Education
Physics
Buck- Boost converter failed on surge at 500volts
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Prashant Kumar" data-source="post: 740012"><p><h4>Basic Technical Details</h4><p></p><p>The driver is basically a DC solar charge controller, it's used in solar street lights, it requires a battery and panel. This driver uses the Buck-Boost Topology. At night it behaves as a Boost converter from battery to the lamp load. In sunlight - when charging - it behaves as a Buck converter.</p><p></p><ul> <li data-xf-list-type="ul"><br /> Load - 12W<br /> <br /> </li> <li data-xf-list-type="ul"><br /> Battery - Li-Po4 (12.8v)<br /> <br /> </li> <li data-xf-list-type="ul"><br /> Panel - 75W (21VDC)<br /> </li> </ul><h4>Problem</h4><p></p><p>To cope with thunderstorms and other upsets, we need to test the driver circuit to withstand overvoltages on the connections to battery and load.</p><p></p><p>The test procedure uses a 1000V pulse, of either polarity, at the panel input side.</p><p></p><p>Our initial choice of circuit protection is a MOV as shown in the circuit diagram below. The MOV part# is CVR 40D14. With this MOV, the circuit failed at a positive surge of 750 volts and also failed at a negative surge of 500 volts. The mosfets are rated 40V maximum.</p><p></p><h4>Question</h4><p></p><p>How to choose the right protection circuitry to pass 1000 volts surge ?</p><p></p><p>If you want any other technical details please let me know.</p><p></p><p><a href="https://i.sstatic.net/UsMjH.jpg"><img src="https://i.sstatic.net/UsMjH.jpg" alt="a fragment of the schematic of the driver circuit, showing the buck-boost mosfets, and the location of the MOV" class="fr-fic fr-dii fr-draggable " style="" /></a></p></blockquote><p></p>
[QUOTE="Prashant Kumar, post: 740012"] [HEADING=3]Basic Technical Details[/HEADING] The driver is basically a DC solar charge controller, it's used in solar street lights, it requires a battery and panel. This driver uses the Buck-Boost Topology. At night it behaves as a Boost converter from battery to the lamp load. In sunlight - when charging - it behaves as a Buck converter. [LIST] [*] Load - 12W [*] Battery - Li-Po4 (12.8v) [*] Panel - 75W (21VDC) [/LIST] [HEADING=3]Problem[/HEADING] To cope with thunderstorms and other upsets, we need to test the driver circuit to withstand overvoltages on the connections to battery and load. The test procedure uses a 1000V pulse, of either polarity, at the panel input side. Our initial choice of circuit protection is a MOV as shown in the circuit diagram below. The MOV part# is CVR 40D14. With this MOV, the circuit failed at a positive surge of 750 volts and also failed at a negative surge of 500 volts. The mosfets are rated 40V maximum. [HEADING=3]Question[/HEADING] How to choose the right protection circuitry to pass 1000 volts surge ? If you want any other technical details please let me know. [URL='https://i.sstatic.net/UsMjH.jpg'][IMG alt="a fragment of the schematic of the driver circuit, showing the buck-boost mosfets, and the location of the MOV"]https://i.sstatic.net/UsMjH.jpg[/IMG][/URL] [/QUOTE]
Name
Verification
Post reply
Home
Forums
All Topics
Education
Physics
Buck- Boost converter failed on surge at 500volts
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top