---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 12/21/14: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 08:45 AM - Re: How does the Ducatti rectifier/regulator work? (user9253) 2. 03:16 PM - Re: How does the Ducatti rectifier/regulator work? (Robert L. Nuckolls, III) 3. 04:21 PM - Re: How does the Ducatti rectifier/regulator work? (C&K) 4. 04:34 PM - Power stabilizer wiring (Weaver, Erich) 5. 10:52 PM - Re: Power stabilizer wiring (Jeff Luckey) ________________________________ Message 1 _____________________________________ Time: 08:45:50 AM PST US Subject: AeroElectric-List: Re: How does the Ducatti rectifier/regulator work? From: "user9253" I assume that the SCRs conduct at low voltage and shut off when the voltage on terminal "C" reaches the set-point. And heat is generated due to the forward voltage drop across the SCRs. The battery symbol in the Rotax regulator/rectifier schematic looks upside down. According to this forum: http://www.edaboard.com/thread67699.html The "E" in resistor values stands for ohms. Thus I interpret 2E2 to be 2.2 ohms. Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=435958#435958 ________________________________ Message 2 _____________________________________ Time: 03:16:39 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: How does the Ducatti rectifier/regulator work? At 18:43 2014-12-20, you wrote: > >Can we assume that 820E and 2E2 resistors in the schematic are 820 >ohm and 2R2 (2.2) ohm resistors? >Ken Yes . . . Are you contemplating a DIY clone? Bob . . . ________________________________ Message 3 _____________________________________ Time: 04:21:01 PM PST US From: C&K Subject: Re: AeroElectric-List: How does the Ducatti rectifier/regulator work? On 21/12/2014 6:15 PM, Robert L. Nuckolls, III wrote: > > > At 18:43 2014-12-20, you wrote: >> >> Can we assume that 820E and 2E2 resistors in the schematic are 820 >> ohm and 2R2 (2.2) ohm resistors? >> Ken > > Yes . . . > > Are you contemplating a DIY clone? > Yes but not immediately. I did a one off many years ago for the positive side of a wound field alternator with a commercial IC that has worked out well. I'd like to regulate the charging on some small equipment that is hard on batteries and I also told myself that I'd roll my own if I ever need another John Deere unit for the airplane. I like more temperature compensation than commercial regulators incorporate (and my batteries seem to agree...) Ken ________________________________ Message 4 _____________________________________ Time: 04:34:53 PM PST US From: "Weaver, Erich" Subject: AeroElectric-List: Power stabilizer wiring Rather than a standby battery I am installing a 4 amp rated 'Intelligent Power Stabilizer' on my z-13/8 wired RV for brownout protection to one of my two EFIS screens during startup. The EFIS draws 1 amp. The manual says to install a 12 amp fuse on the power inlet to the IPS unit and a second 5 amp inline fuse on the wire providing power from the IPS to the secondary power inlet on the EFIS. First question: the 12 amp fuse can just be on my main bus so no hassle there but i would rather not have the 5 amp inline fuse buried behind the subpanel with the IPS if its not absolutely necessary. Do I definitely need both fuses for adequate protection? Second question: Any reason the IPS can't be used as the sole source of power to the EFIS rather than as backup? If I wired the IPS to the ebus I have the backup alternator I can use should the primary fail. Maybe the IPS is not intended for full time operation or perhaps it draws more current than practical for the ebus? Thanks Erich This e-mail and any attachments contain URS Corporation confidential information that may be proprietary or privileged. If you receive this message in error or are not the intended recipient, you should not retain, distribute, disclose or use any of this information and you should destroy the e-mail and any attachments or copies. ________________________________ Message 5 _____________________________________ Time: 10:52:26 PM PST US From: Jeff Luckey Subject: Re: AeroElectric-List: Power stabilizer wiring Eric wrote: Second question: Any reason the IPS can't be used as the sole source of power to the EFIS rather than as backup? ... If the IPS is the sole source of power & it fails then it takes-out your efis. Any component you add to the critical path decreases reliability. If you wire it as you described, then it helps w/ brownout and if it fails it's no big deal. -Jeff On Sunday, December 21, 2014 4:42 PM, "Weaver, Erich" wrote: Rather than a standby battery I am installing a 4 amp rated 'Intelligent Power Stabilizer' on my z-13/8 wired RV for brownout protection to one of my two EFIS screens during startup. The EFIS draws 1 amp. The manual says to install a 12 amp fuse on the power inlet to the IPS unit and a second 5 amp inline fuse on the wire providing power from the IPS to the secondary power inlet on the EFIS. First question: the 12 amp fuse can just be on my main bus so no hassle there but i would rather not have the 5 amp inline fuse buried behind the subpanel with the IPS if its not absolutely necessary. Do I definitely need both fuses for adequate protection? Second question: Any reason the IPS can't be used as the sole source of power to the EFIS rather than as backup? If I wired the IPS to the ebus I have the backup alternator I can use should the primary fail. Maybe the IPS is not intended for full time operation or perhaps it draws more current than practical for the ebus? Thanks Erich This e-mail and any attachments contain URS Corporation confidential information that may be proprietary or privileged. 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