A Resolver Software Decoding Method Applicable to Motor Control
A resolver and software decoding technology, applied in the field of resolvers, can solve the problems of requiring DSP chips and increasing the software load of the control processor, so as to achieve the effects of improving reliability, reducing system costs and improving accuracy
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[0046](1) A resolver software decoding method, the method adopts the eTPU module of the MPC57xx series chip of NXP to realize resolver decoding. The eTPU (Enhanced Time Processor Uint) module is a programmable I / O controller with its own core and memory system that can perform complex timing and I / O management independently of the CPU. Firstly, sample the excitation signal and modulation signal by configuring the analog to digital converter ADC (analog to digital converter) module of the microcontroller; then configure the channel of the direct memory access module DMA() to transmit the sampled data and store it in the data RAM area of the eTPU; Finally, the data is processed in the eTPU module, by using the peak value of the sampled data, and then the angle tracking observer estimates the position of the rotor, so as to realize the decoding function. The control includes the following steps:
[0047] a. Configure the ADC module and DMA module during CPU initialization. Acco...
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