Resolver feedback signal frequency division method and system based on ad2s1210 resolver decoder chip

Abstract

A method for frequency division of a resolver feedback signal based on the AD2S1210 resolver decoder chip, comprising: first obtaining the A-phase pulse signal, the B-phase pulse signal and the NM-phase pulse signal output by the AD2S1210 resolver decoder chip according to a preset number of lines; Obtain the frequency division coefficient sel, and obtain the period value reset of the frequency division pulse count of the leading phase pulse signal according to the frequency division coefficient sel cnt and the period value half of the frequency division pulse count of the lagging phase pulse signal cnt . Then XOR the A-phase pulse signal and the B-phase pulse signal to obtain the pulse signal clk AB , according to the period value half cnt and period value reset cnt For pulse signal clk AB The rising or falling edge marks the edge information, and according to the pulse signal clk AB and edge information to obtain the frequency-divided outA pulse signal and outB pulse signal. Due to the pulse signal clk AB Rising edge or falling edge is marked with edge information to carry out frequency division to realize arbitrary integer frequency division processing of the orthogonal pulse signal output by AD2S1210 resolver decoding, which not only simplifies the frequency division process, but also is convenient and flexible.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a resolver feedback signal frequency division method and system based on an AD2S1210 resolver decoding chip. Background technique [0002] A resolver is a precision angle, position and speed detection device. For a motor with a resolver, the resolver decoding system can analyze the position and speed information of the motor rotor from the analog signal output by the resolver with the angle change of the motor rotor. And provide it to the motor driver (inverter, servo driver, etc.) for the closed-loop control of the motor's own speed and position. At the same time, the resolver decoding system can also output the rotor position and speed information of the motor to the post-stage control in the form of quadrature pulses. system, so as to achieve multi-level control system linkage control. However, due to the different transmission ratios between different control systems, ...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a frequency division method of a resolver feedback signal based on the AD2S1210 resolver decoding chip to solve the technical problem in the prior art that the orthogonal pulse signal output by the AD2S1210 resolver decoding chip cannot be divided by any integer multiple.

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