| 摘要 |
1,127,379. Trigonometrical conversion circuits. GENERAL PRECISION SYSTEMS Inc. 19 June, 1967 [28 June, 1966], No. 28202/67. Heading G4G. A threephase synchro S wherein an A.C. energized rotor (not shown) is positioned by angular input # relative to windings 1, 2, 3 produces signals E sin # sin wt over resistor 7 to the input amplifier 5 with feedback resistor 9 whose input - E sin # sin wt is fed back over resistor 11 to the input amplifier 6 with feedback resistor 10; also receiving E sin (# + 60‹) sin wt from winding 2 over resistor 8. If resistors 7, 8, 9 are equal; resistor 11 is twice resistor 9 and resistor 10 is 2/#3 resistor 9; it is shown that the outputs at 12,13 13 are proportional to - E sin # sin wt and - E cos # sin wt respectively, wherein E sin wt is the excitation of the synchro rotor. |
