book on synchros/resolvers
in [Design]
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From: John Larkin on 19 Apr 2010 19:58 Can anybody suggest a good one? John
From: VWWall on 19 Apr 2010 20:24 John Larkin wrote: > Can anybody suggest a good one? > For their use in old time systems, Rad Lab Series Vol.21. If you need to connect between a synchro and a resolver, use a Scott-T transformer. :-) -- Virg Wall, P.E.
From: John Larkin on 19 Apr 2010 20:31 On Mon, 19 Apr 2010 17:24:14 -0700, VWWall <vwall(a)large.invalid> wrote: >John Larkin wrote: >> Can anybody suggest a good one? >> >For their use in old time systems, Rad Lab Series Vol.21. I have that. And most of the other books don't seem to be much newer! > >If you need to connect between a synchro and a resolver, use a Scott-T >transformer. :-) An expensive transformer seems to be a silly way to do a little trig. Adding another multiply to an ARM program costs ... calculates furiously ... $0.00. I'm contemplating designing an LVDT/synchro/resolver simulator. The sensible way seems to be to digitize the excitation voltage and make the various winding voltages with DACs, and do all the rest in a uP or FPGA. John
From: RogerN on 19 Apr 2010 21:57 "John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message news:q4tps5ht10fmc3mt20cof3m4d06ldaul3q(a)4ax.com... > On Mon, 19 Apr 2010 17:24:14 -0700, VWWall <vwall(a)large.invalid> > wrote: > >>John Larkin wrote: >>> Can anybody suggest a good one? >>> >>For their use in old time systems, Rad Lab Series Vol.21. > > I have that. And most of the other books don't seem to be much newer! > >> >>If you need to connect between a synchro and a resolver, use a Scott-T >>transformer. :-) > > An expensive transformer seems to be a silly way to do a little trig. > Adding another multiply to an ARM program costs ... calculates > furiously ... $0.00. > > I'm contemplating designing an LVDT/synchro/resolver simulator. The > sensible way seems to be to digitize the excitation voltage and make > the various winding voltages with DACs, and do all the rest in a uP or > FPGA. > > John I think some of the chip manufacturers have resolver to digital converters, they may have useful documentation or app. notes. I have some brushless servo motors with resolver feedback, I'm hoping to use someday in a CNC project. RogerN
From: Phil Hobbs on 19 Apr 2010 22:23
RogerN wrote: > "John Larkin" <jjlarkin(a)highNOTlandTHIStechnologyPART.com> wrote in message > news:q4tps5ht10fmc3mt20cof3m4d06ldaul3q(a)4ax.com... >> On Mon, 19 Apr 2010 17:24:14 -0700, VWWall <vwall(a)large.invalid> >> wrote: >> >>> John Larkin wrote: >>>> Can anybody suggest a good one? >>>> >>> For their use in old time systems, Rad Lab Series Vol.21. >> I have that. And most of the other books don't seem to be much newer! >> >>> If you need to connect between a synchro and a resolver, use a Scott-T >>> transformer. :-) >> An expensive transformer seems to be a silly way to do a little trig. >> Adding another multiply to an ARM program costs ... calculates >> furiously ... $0.00. >> >> I'm contemplating designing an LVDT/synchro/resolver simulator. The >> sensible way seems to be to digitize the excitation voltage and make >> the various winding voltages with DACs, and do all the rest in a uP or >> FPGA. >> >> John > > I think some of the chip manufacturers have resolver to digital converters, > they may have useful documentation or app. notes. I have some brushless > servo motors with resolver feedback, I'm hoping to use someday in a CNC > project. > > RogerN > > Old Analog Devices books. They used to have a "Synchro/Resolver Handbook" iirc. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal ElectroOptical Innovations 55 Orchard Rd Briarcliff Manor NY 10510 845-480-2058 hobbs at electrooptical dot net http://electrooptical.net |