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Sender: "piclist-bounces@mit.edu" Date: Sat, 22 Feb 2020 09:57:43 -0800 Subject: Re: [EE] Simulating a push pull converter Thread-Topic: [EE] Simulating a push pull converter Thread-Index: AdXpqtT2anOTnqmrRHmJjfpKIx7T6Q== Message-ID: References: List-Help: List-Subscribe: , List-Unsubscribe: , In-Reply-To: Reply-To: Microcontroller discussion list - Public. Accept-Language: en-US X-MS-Exchange-Organization-AuthAs: Anonymous X-MS-Exchange-Organization-AuthSource: TS500.efplus4.local X-MS-Has-Attach: X-Auto-Response-Suppress: All X-MS-Exchange-Organization-SenderIdResult: Pass X-MS-Exchange-Organization-PRD: mit.edu X-MS-TNEF-Correlator: received-spf: Pass (protection.outlook.com: domain of gmail.com designates 209.85.219.174 as permitted sender) receiver=protection.outlook.com; client-ip=209.85.219.174; helo=mail-yb1-f174.google.com; dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=UBpHQ1lZ+4L5tMUm070TVfxBHAW1cf+dXpH7MRn6ebg=; b=akVtBHU1FAFoQKz+ECiPtmLRXK67DTwye7JISBBeVwnxoT2vJCdRPvkkMhthzpM6mp Gya8oNXwNbbL8FLElb8HExEpwz205PurFW7/PrM+SXMN/Amxi3BKMjQhyO6MW73D5bHp 8dtD/Rt5zZWRV4Le2ZUwAXdBawNEW3Nzu0FH1C2wwkY44uNqz8Q+Oa4NnYFqHNeVQFqT DfDtkmhLXewC+CwkkHw4vOpDVDHjRjmHMIpkH9jOZg+J+rYaSJ+T/BYtmUUhJD+fDerT JuOzlf7zcSAwnOUl8hPDCuW/IpPXC+CYRcS2JAKL8WWwrjWCVbEFsD8/92OWppZRZEtT oZ4Q== authentication-results: spf=pass (sender IP is 209.85.219.174) smtp.mailfrom=gmail.com; mit.edu; dkim=pass (signature was verified) header.d=gmail.com;mit.edu; dmarc=pass action=none header.from=gmail.com;compauth=pass reason=100 errors-to: piclist-bounces@mit.edu list-id: "Microcontroller discussion list - Public." list-post: x-beenthere: piclist@mit.edu x-mailman-version: 2.1.6 x-received: by 2002:a25:b84e:: with SMTP id b14mr89374ybm.200.1582394270290; Sat, 22 Feb 2020 09:57:50 -0800 (PST) x-topics: [EE] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Greetings Bob, Adding in Rise and Fall time improved the symmetricity of the waveform, though negligible, but there still exists a small difference -421V vs 431V. If it were a practical scenario, it could be assumed that it were the magnetization current. But does LTSpice know about magnetization current in this situation ? Cheers, Manu On Sat, Feb 22, 2020 at 10:54 PM Bob Blick wrote: > > Greetings Manu, > > LTSpice always needs to have a rise and fall time specified for all pulse= sources. Make them some tiny value, say 0.01u and everything works fine. > > Cheerful regards, Bob > > ________________________________________ > From: piclist-bounces@mit.edu on behalf of Manu= Abraham > Sent: Saturday, February 22, 2020 1:17 AM > To: Microcontroller discussion list - Public. > Subject: [EE] Simulating a push pull converter > > Hi, > > Simulating a push pull converter in LTSpice, I get an asymmetric output s= wing. > > Any thoughts, why the swing is asymmetric ? > > Thanks, > Manu > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .