Homepage - RF Cafe
Webmaster: Kirt Blattenberger | KB3UON | Sitemap | ©1996-2014     Visit RF Cafe on
      Menu below is just a small sample of what is here!          Visit RF Cafe on Facebook Visit RF Cafe on Twitter Visit RF Cafe on LinkedIn
Custom Search
More than 10,000 searchable pages indexed.
•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Phase Method of Resolver Decoding - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


RennieD
Post subject: Phase Method of Resolver Decoding
Unread post Posted: Thu Mar 03, 2005 3:18 pm

RESOLVER DECODING (PHASE METHOD)

Looking for any information on circuits that will decode analog resolver signals into unambiguous binary positional data.

I'm specifically looking for information on a technique called the PHASE METHOD of decoding, wherein the sin & cosine windings are driven and the position data is extracted from the rotor signal. The rotor phase, relative to the reference signal phase, is compared to determine the amount of shaft rotation. The phases are compared by keeping track of their zero crossings, and a binary count output that represents their phase difference, (zero crossings) is generated. The binary output is generated by utilizing zero crossing detectors on the reference signal to start a binary up/down counter and alternately, zero crossings from the rotor signal are used to latch the binary count when they occur, the count that is latched by the rotor's zero crossing represents the difference in phase between the two signals and thus the amount of angular rotation of the shaft in binary. For example, a zero count, would mean the two signals are in phase, a 1/2 max count, signals are 180 out of phase, and so on. One must also keep track of rotation direction so the counter can count up or down in coordination with the direction. This system is not as complicated as it might first seem but I am looking for help from anyone who has experience with this technique.

I am specifically NOT looking for information on ratiometric tracking converters that typically drive the resolver's rotor and decode the sine and cosine signals. But rather, only information on this alternate PHASE METHOD.

Any info on this subject is wanted, explanations, insights, schematics, IC's, etc.

Thanks,

D. Rennie

(I apologize if this is the wrong forum for this post. Please point me to the correct one.)



Posted  11/12/2012
A Disruptive Web Presence

Custom Search
Over 10,000 pages indexed! (none duped or pirated)

Read About RF Cafe
Webmaster: Kirt Blattenberger
    KB3UON

RF Cafe Software

RF Cascade Workbook
RF Cascade Workbook is a very extensive system cascaded component Excel workbook that includes the standard Gain, NF, IP2, IP3, Psat calculations, input & output VSWR, noise BW, min/max tolerance, DC power cauculations, graphing of all RF parameters, and has a graphical block diagram tool. An extensive User's Guide is also included. - Only $35.
RF system analysis including
frequency conversion & filters

RF & EE Symbols Word
RF Stencils for Visio

Product & Service Directory
Personally Selected Manufacturers
RF Cafe T-Shirts & Mugs

RF Cafe Software

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
Your RF Cafe Progenitor & Webmaster
Click here to read about RF CafeKirt Blattenberger... single-handedly redefining what an
                                 engineering website should be.

View the YouTube RF Cafe Intro Video Carpe Diem! (Seize the Day!)

5CCG (5th MOB): My USAF radar shop

Airplanes and Rockets: My personal hobby website

Equine Kingdom: My daughter Sally's horse riding website