基于求模运算的旋转变压器解码算法的研究

文中提出了一种基于求模运算的旋转变压器解码算法并进行了研究。首先分析了旋转变压器求模运算解码算法的原理,给出了转角的正弦、余弦函数和转速的计算方法。然后在CORDIC算法基础上简化了求模运算,提高了FPGA求模运算的速度和减少硬件实现的资源量。接着旋变解码算法进行了FPGA纯硬件实现,即基于Quartus II平台用Verilog实现语言编程。最后利用Modelsim软件验证了该设计模块的可行性和正确性。通过与基于转子位置角进行解码的方法进行相比,证实了本文所提出的对旋变信号进行基于求模运算的解码方法不仅可以简化永磁电动机矢量控制系统的硬件和软件,而且可以提高控制的实时性。

Research of Decoding algorithm of resolver based on Modulo Operation

This paper presents a decoding algorithm of resolver based on modulo operation.Firstly,it analyzes principle of the decoding algorithm based on modulo operation and puts out the method of sine and cosine of the rotor angle and speed.Secondly it simplifies the modulo operation based on CORDIC algorithm and improves the FPGA implementation speed and reduces the amount of resources.Then the decoding algorithm of resolver is hardware implemented with FPGA,that is on Quartus II platform with Verilog language programming.Finally,the design modules is verified by Modelsim software,and the results is feasible and correct.Compared with the current decoding algorithm of rotor angle,decoding algorithm based on modulo operation proposed in this paper not only can simplify the hardware and software of permanent magnet motor control system,but also can improve the real-time controlling.