JPH0189319U

JPH0189319U -

Info

Publication number: JPH0189319U
Application number: JP18519187U
Authority: JP
Priority date: 1987-12-04
Filing date: 1987-12-04
Publication date: 1989-06-13

Description

[Brief explanation of drawings]

第１図はこの考案の一実施例を示す図、第２図
は従来のＳ／Ｄ変換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はアナ
ログ・デイジタル変換器、３は象限選択回路、４
は余弦乗算器、５は正弦乗算器、６は引き算器、
７は選択器、８は加算器、９はレジスタ、１０は
トランス、１１は符号判定器、１２は位相検波器
、１３は電圧制御発信器、１４は可逆カウンタ、
１５は符号反転器である。なお、各図中同一符号
は同一又は相当部分を示す。 FIG. 1 is a diagram showing an embodiment of this invention, and FIG. 2 is a diagram showing a conventional S/D conversion device. In the figure, 1 is a Scott transformer, 2 is an analog-to-digital converter, 3 is a quadrant selection circuit, and 4 is a quadrant selection circuit.
is a cosine multiplier, 5 is a sine multiplier, 6 is a subtracter,
7 is a selector, 8 is an adder, 9 is a register, 10 is a transformer, 11 is a sign determiner, 12 is a phase detector, 13 is a voltage controlled oscillator, 14 is a reversible counter,
15 is a sign inverter. 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 or a conversion circuit that inputs a 3-phase synchro signal and converts it into a 2-phase resolver signal, and 2 outputs of the Scotto transformer at the input end.
A first analog-to-digital converter inputs a sine wave signal of one of the two-phase resolver signals and converts it into a digital signal; a second analog-to-digital converter for inputting a signal and converting it into a digital signal; and a second analog-to-digital converter for inputting a signal and converting it into a digital signal;
a quadrant selection circuit that inputs an output signal of a digital converter, inputs an output signal of the second analog-to-digital converter to a second input terminal, and outputs two signals according to an angular quadrant; a cosine multiplier that inputs and multiplies by the cosine value of the first input signal and the second input signal; A sine multiplier that inputs two signals and subtracts the two signals, a sign inverter that inputs one signal and inverts its sign, and a selection that inputs two signals and selects and outputs one of them. an adder that inputs two signals and adds the two signals;
When two signals are input, the first input signal causes the second
In a synchro-digital converter, the synchro-digital converter is configured with a register that temporarily holds an input signal, and a sign determiner that determines the sign of the input signal. a cosine multiplier that inputs a wave, inputs the signal of the register to a second input terminal, and multiplies the signal of the first input terminal by the value of the cosine of the angle at the second input terminal; The cosine wave of one of the two output signals of the quadrant selection circuit is input to one end, the signal of the register is input to the second input end, and the value of the sine of the angle at the second input end is input to the first input end. a sine multiplier that multiplies the signal at the end; a first input terminal of the two input terminals receives the output signal of the cosine multiplier, and a second input terminal receives the output signal of the sine multiplier; A subtracter that subtracts two signals, a sign inverter that inputs the output of the subtracter to its input terminal and inverts its sign, and a sign determiner that inputs a reference signal to its input terminal and determines its sign. The output signal of the subtracter is inputted to a first input terminal of the input terminals, the output signal of the sign inverter is inputted to a second input terminal, and the output signal of the sign determiner is inputted to a third input terminal. a selector that selects and outputs the signal given to the first input terminal or the signal given to the second input terminal according to the signal given to the third input terminal; an adder that inputs the output signal of the register to one input terminal, inputs the output signal of the selector to a second input terminal, and adds the two signals; A register that inputs a clock signal to an input terminal, inputs the output signal of the adder to a second input terminal, and temporarily holds the signal given to the second input terminal with the signal given to the first input terminal. A synchro-digital conversion device characterized by comprising: