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Article #12Re: Using AC fan in casing
From: Jeff Jonas
Date: Mon, 21 Dec 1998 00:00
Date: Mon, 21 Dec 1998 00:00
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2349 bytes
>>My question is, since it is an AC fan, will there be the issue of emf >>from the fan and its power cord? I am worry that the emf will interfere >>with the other devices inside the casing. >No. Usually AC motors do not give interference since you are not using >speed control chopper drives. Ah, thank you for noting that caveat that I forgot. I'm unsure what is gained by thermostatically controller fans since in my case, the fan makes awful noise at the lower speeds! I fear it's contributing to the bearing wear by varying the speed instead of just spinning at a constant speed. And what's the worst that will happen: my computer will be cooled too much? >DC motors with brush will give interferece >But even DC motors have brushless type now I daresay that all the DC cooling fans I've seen or taken apart were brushless since brush commutator motors are loud with the buzzing and are used in high power situations such as hair dryers. Apparently the brushless DC motor controllers are so cheap there's no excuse to use anything else. -- Jeffrey Jonas jeffj@panix(dot)com The original Dr. JCL and Mr .hide
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 106eab,7dce2c6648040120 X-Google-Attributes: gid106eab,public X-Google-Thread: fa57c,7dce2c6648040120 X-Google-Attributes: gidfa57c,public X-Google-Thread: f8e37,7dce2c6648040120 X-Google-Attributes: gidf8e37,public X-Google-Thread: 115102,7dce2c6648040120 X-Google-Attributes: gid115102,public X-Google-Thread: 1081b0,7dce2c6648040120 X-Google-Attributes: gid1081b0,public X-Google-Thread: f70d1,7dce2c6648040120 X-Google-Attributes: gidf70d1,public X-Google-Thread: 109e38,7dce2c6648040120 X-Google-Attributes: gid109e38,public X-Google-Thread: fe176,7dce2c6648040120 X-Google-Attributes: gidfe176,public From: jeffj@panix.com (Jeff Jonas) Subject: Re: Using AC fan in casing Date: 1998/12/21 Message-ID: <75m2rd$nq8@panix.com> X-Deja-AN: 424567710 References: <367BDE24.CCA3F4AC@mbox5.singnet.com.sg> <75hbr4$of5$1@mawar.singnet.com.sg> Organization: Jeff's House of Electronic Parts Newsgroups: sg.comp.hardware.ibmpc,alt.comp.hardware.homebuilt,comp.sys.ibm.pc.hardware.misc,alt.comp.hardware.homedesigned,biz.comp.hardware,sg.consumers,sg.marketplace,sg.singnet.marketplace X-Newsposter: trn 4.0-test55 (26 Feb 97)