JPH0239118U

JPH0239118U -

Info

Publication number: JPH0239118U
Application number: JP11765488U
Authority: JP
Priority date: 1988-09-07
Filing date: 1988-09-07
Publication date: 1990-03-15

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は排他的論理和ゲート、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 an exclusive OR gate, 12 is a phase detector, 13 is a voltage controlled oscillator, 14 is a reversible counter, and 15 is a sign inverter. be. 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 receives two signals and multiplies them by the cosine values of the first and second input signals; and a cosine multiplier that receives two signals and multiplies them by the sine values of the first and second input signals 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 the synchro-digital conversion device, the synchro-digital conversion device is constituted by a register that temporarily holds an input signal of two signals, and an exclusive OR gate that outputs an exclusive OR of two signals. Cosine multiplication that inputs one sine wave of two output signals, inputs the signal of the register to the second input terminal, and multiplies the signal at the first input terminal by the value of the cosine of the angle at the second input terminal. input the residual wave of one of the two output signals of the quadrant selection circuit to the first input terminal, input the signal of the register to the second input terminal, and calculate the sine of the angle at the second input terminal. a sine multiplier that multiplies a value by a signal at a first input terminal; 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 inputs an output signal and subtracts the two signals;
a sign inverter that inputs the output of the subtracter to an input terminal and inverts the sign; a sign inverter that inputs the output signal of the register to a first input terminal, and a reference signal to a second input terminal; an exclusive OR gate that outputs the exclusive OR of the subtracter, the output signal of the subtracter is input to the first input terminal of the three input terminals, and the output signal of the sign inverter is input to the second input terminal. Enter the third
The output signal of the exclusive OR gate is input to the input terminal of , and the signal applied to the first input terminal or the signal applied to the second input terminal is controlled by the signal applied to the third input terminal. The output signal of the register is input to the first input terminal of the selector for selecting and outputting, and the output signal of the selector is input to the second input terminal, and the two signals are added. a clock signal is input to the first input terminal of the two input terminals, an output signal of the adder is input to the second input terminal, and the second 1. A synchro-digital conversion device comprising: a register for temporarily holding a signal applied to an input terminal of the synchro-digital converter.