基于AD698的旋转变压器驱动及解码电路设计

摘要

A kind of driving and decoding circuit based on AD698 is main designed, the circuit structure is simple, the excitation signal for resolver is produced by using the AD698 signal disposal added simple external components. The signal decoding uses AD698 chip A channel as the main control port, the B channel as a signal conditioning port, the angle signal is collected through the signal demodulation, and the standard signal is collected by A/D acquisition card. The driver decoding circuit board has been successfully used in a test of steering gear brushless DC motor for speed measuring devices.%主要设计了一种基于AD698芯片的旋转变压器的驱动和解码电路,该电路结构简单,采用AD698信号调理添加简单的外接元件产生旋变所需的励磁信号.信号的解码采用AD698芯片A通道作为主要控制端口,B通道作为信号调理端口,通过信号的调制解调来线性采集角度信号,并由A/D采集卡采集标准信号.该驱动解码电路板已成功应用于某舵机试验台直流无刷电机测速装置中.