JPH0184018U

JPH0184018U -

Info

Publication number: JPH0184018U
Application number: JP1987179222U
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、３ａ，３ｂは余弦乗算器、４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 synchronized 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, 3a, 3b are cosine multipliers, 4 is a sine multiplier, 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 calculation 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, inputs the sine wave signal from the Scottsto transformer and the output of a reversible counter, and calculates the cosine of the output data of the reversible counter. a first cosine multiplier that multiplies the sine wave signal by a value; inputting the cosine wave signal from the Scott transformer and the output of the reversible counter;
a sine multiplier that multiplies the cosine wave signal by the sine value of the output data of the reversible counter; a subtracter, inputting the output signal of the first subtracter to the first input terminal of the two input terminals, inputting the carrier wave to the second input terminal,
a phase detector that detects and rectifies the carrier wave of the signal at the first input terminal; a voltage controlled oscillator that receives the output signal of the phase detector and outputs a clock signal;
the reversible counter which inputs the output signal of the phase detector to a first input terminal of the two input terminals, inputs the clock signal of the voltage controlled oscillator to a second input terminal, and counts up or down; a second cosine multiplier that receives the carrier wave and the output of the reversible counter and multiplies the cosine value of the output data of the reversible counter by the value of the carrier wave; and the output signal of the second cosine multiplier and the a second subtracter that inputs the cosine wave output signal of the Scott transformer and outputs the difference therebetween; a reference value generator that generates a reference value signal; and the output of the second subtracter and the reference value. A synchro-digital conversion device comprising: a comparator that inputs a reference value output from a generator, compares the two inputs, and outputs the result.