基于求模运算的旋转变压器解码算法的研究  

Research on the decoding algorithm of the resolver based on the modulo operation

作　　者：黄劭刚[1] 宋凤林[1] 刘辉[1] 

机构地区：[1]南昌大学信息工程学院,南昌330031

出　　处：《电测与仪表》2015年第2期85-89,共5页Electrical Measurement & Instrumentation

摘　　要：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。This paper presented and studied a decoding algorithm of the resolver based on the modulo operation. Firstly,the principle of the decoding algorithm of the resolver based on the modulo operation was analyzed,and the calculation method of the sine and cosine functions of the rotor angle and speed was presented. Secondly the modulo operation was simplified based on the CORDIC algorithm so as to improve the speed of the FPGA modulo operation and reduce the resources amount of the hardware implementation. Then the decoding algorithm of the resolver was hardware implemented with FPGA,that is,on the Quartus II platform language programming was realized with Verilog. Finally,the feasibility and correctness of the design modulewas verified by the Modelsim software. Compared with the decoding algorithm based on the rotor angle,the proposed decoding algorithm based on the modulo operation could not only simplify the hardware and software of the permanent magnet motor control system,but also improve the real-time control.

关 键 词：旋变解码 求模运算 CORDIC算法 FPGA实现 

分 类 号：TM383[电气工程—电机]