JPH0184017U

JPH0184017U -

Info

Publication number: JPH0184017U
Application number: JP1987179221U
Authority: JP
Priority date: 1987-11-25
Filing date: 1987-11-25
Publication date: 1989-06-05

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示すシンクロ・
デイジタル変換装置を示す構成図、第２図は従来
のシンクロ・デイジタル変換装置を示す構成図、
第３図は従来のシンクロ・デイジタル変換装置の
正常・異常の判定装置を示す図である。図において、１はスコツト・トランス、２は象
限選択回路、３は余弦乗算器、４ａ，４ｂは正弦
乗算器、５ａ，５ｂは引き算器、６はトランス、
７は位相検波器、８は電圧制御発振器、９は可逆
カウンタ、１０は基準値発生器、１１は比較器、
１２は従来のシンクロ・デイジタル変換装置、１
３はデイジタル・シンクロ変換装置、１４は切換
回路、１５は比較演算回路である。なお、各図中
同一符号は同一または相当部分を示す。 Figure 1 shows an embodiment of this invention.
A block diagram showing a digital converter; FIG. 2 is a block diagram showing a conventional synchro-digital converter;
FIG. 3 is a diagram showing a conventional device for determining whether a synchro-digital converter is normal or abnormal. In the figure, 1 is a Scott transformer, 2 is a quadrant selection circuit, 3 is a cosine multiplier, 4a, 4b are sine multipliers, 5a, 5b are subtracters, 6 is a transformer,
7 is a phase detector, 8 is a voltage controlled oscillator, 9 is a reversible counter, 10 is a reference value generator, 11 is a comparator,
12 is a conventional synchro-digital converter; 1
3 is a digital synchro conversion device, 14 is a switching circuit, and 15 is a comparison circuit. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

A Scotto transformer inputs a 3-phase synchronized signal and converts it into a 2-phase resolver signal, and inputs a sine wave signal from the Scotto transformer and the output of the reversible counter, and calculates the cosine of the output data of the reversible counter. a cosine multiplier that multiplies the sine wave signal by the value of a first sine multiplier that multiplies the above-mentioned cosine multiplier and the first sine multiplier, a first subtracter that inputs the output signals of the cosine multiplier and the first sine multiplier and outputs the difference between them; a phase detector that inputs the output signal of the first subtracter to an input terminal, inputs a carrier wave to a second input terminal, and detects and rectifies the carrier wave of the signal at the first input terminal; and the phase detector The output signal of the phase detector is input to the first input terminal of the two input terminals, and the output signal of the voltage controlled oscillator is input to the second input terminal. a reversible counter that inputs a clock signal and counts up or down, and a second circuit that inputs the carrier wave and the output of the reversible counter and multiplies the sine value of the output data of the reversible counter by the value of the carrier wave. and the second sine multiplier
a second subtracter that inputs the output signal of the sine multiplier of the sine wave and the sine wave output signal of the Scott transformer and outputs the difference therebetween; a reference value generator that generates a reference value signal; A synchro-digital conversion device comprising: a comparator that inputs the output of the subtracter and the reference value output from the reference generator, compares the two inputs, and outputs the result. .